]> git.uio.no Git - u/mrichter/AliRoot.git/blobdiff - ITS/AliITSvPPRsymm.cxx
Corrected setting of magnetic field
[u/mrichter/AliRoot.git] / ITS / AliITSvPPRsymm.cxx
index 82ea37da01a70f5a7a2fbf416b22c1092a7a29f1..537044f7549619b6836687053ca71dd5ef44d0c2 100644 (file)
@@ -1,4 +1,4 @@
-/**************************************************************************
+ /**************************************************************************
  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
  *                                                                        *
  * Author: The ALICE Off-line Project.                                    *
  * provided "as is" without express or implied warranty.                  *
  **************************************************************************/
 
-/*
-$Log$
-Revision 1.5  2001/02/09 20:06:26  nilsen
-Fixed bug in distructor. Can't distroy fixxed length arrays. Thanks Peter.
-
-Revision 1.4  2001/02/09 00:05:31  nilsen
-Added fMajor/MinorVersion variables and made other changes to better make
-use of the new code changes in AliITSgeom related classes.
-
-Revision 1.3  2001/01/30 09:23:13  hristov
-Streamers removed (R.Brun)
-
-Revision 1.2  2001/01/26 20:01:19  hristov
-Major upgrade of AliRoot code
-
-Revision 1.1.2.1  2001/01/15 13:38:32  barbera
-New ITS detailed geometry to be used for the PPR
-
-Revision 1.12  2000/12/10 16:00:44  barbera
-Added last definition of special media like end-ladder boxes and cones
-
-Revision 1.11  2000/10/30 08:02:25  barbera
-PCON's changed into simpler CONS and TUBS. Services now allow for the rails to go through them.
-
-Revision 1.3.2.7  2000/10/27 17:20:00  barbera
-Position of rails w.r.t. the interaction point corrected.
-
-Revision 1.9  2000/10/27 13:31:29  barbera
-Rails between ITS and TPC added.
-
-Revision 1.8  2000/10/27 13:03:08  barbera
-Small changes in the SPD volumes and materials
-
-Revision 1.6  2000/10/16 14:45:37  barbera
-Mother volume ITSD modified to avoid some overlaps
-
-Revision 1.5  2000/10/16 13:49:15  barbera
-Services volumes slightly modified and material added following Pierluigi Barberis' information
-
-Revision 1.4  2000/10/07 15:33:07  barbera
-Small corrections to the ITSV mother volume
-
-Revision 1.3  2000/10/07 13:06:50  barbera
-Some new materials and media defined
-
-Revision 1.2  2000/10/07 10:42:43  barbera
-Mother volume ITSV corrected
-
-Revision 1.1  2000/10/06 23:09:12  barbera
-New  geometry (symmetric services
-
-Revision 1.20  2000/10/02 21:28:08  fca
-Removal of useless dependecies via forward declarations
-
-Revision 1.19  2000/07/10 16:07:19  fca
-Release version of ITS code
-
-Revision 1.14.2.2  2000/05/19 10:09:21  nilsen
-fix for bug with HP and Sun unix + fix for event display in ITS-working branch
-
-Revision 1.14.2.1  2000/03/04 23:45:19  nilsen
-Fixed up the comments/documentation.
-
-Revision 1.14  1999/11/25 06:52:56  fca
-Correct value of drca
-
-Revision 1.13.2.1  1999/11/25 06:52:21  fca
-Correct value of drca
-
-Revision 1.13  1999/10/27 11:16:26  fca
-Correction of problem in geometry
-
-Revision 1.12  1999/10/22 08:25:25  fca
-remove double definition of destructors
-
-Revision 1.11  1999/10/22 08:16:49  fca
-Correct destructors, thanks to I.Hrivnacova
-
-Revision 1.10  1999/10/06 19:56:50  fca
-Add destructor
-
-Revision 1.9  1999/10/05 08:05:09  fca
-Minor corrections for uninitialised variables.
-
-Revision 1.8  1999/09/29 09:24:20  fca
-Introduction of the Copyright and cvs Log
-
-*/
+/* $Id$ */
 
 //////////////////////////////////////////////////////////////////////////////
 //                                                                          //
@@ -117,155 +30,69 @@ Introduction of the Copyright and cvs Log
 // strongly encouraged to uses AliITSv5.                                    //
 //                                                                          //
 //////////////////////////////////////////////////////////////////////////////
-#include <iostream.h>
-#include <iomanip.h>
-#include <TMath.h>
-#include <TRandom.h>
-#include <TVector.h>
+// See AliITSvPPRsymm::StepManager().
+#include <Riostream.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <TBRIK.h>
+#include <TCanvas.h>
+#include <TClonesArray.h>
+#include <TFile.h>    // only required for Tracking function?
 #include <TGeometry.h>
+#include <TLorentzVector.h>
+#include <TMath.h>
 #include <TNode.h>
-#include <TTUBE.h>
-#include <TFile.h>    // only required for Tracking function?
-#include <TCanvas.h>
 #include <TObjArray.h>
-#include <TClonesArray.h>
-
+#include <TObjString.h>
+#include <TPCON.h>
+#include <TSystem.h>
+#include <TTUBE.h>
+#include <TTUBS.h>
+#include <TVirtualMC.h>
 
-#include "AliMC.h"
+#include "AliRun.h"
 #include "AliMagF.h"
 #include "AliConst.h"
-
-#include "../TGeant3/TGeant3.h"
 #include "AliITSGeant3Geometry.h"
-#include "AliITShit.h"
-#include "AliITSvPPRsymm.h"
-#include "AliRun.h"
 #include "AliITSgeom.h"
-#include "AliITSgeomSPD.h"
 #include "AliITSgeomSDD.h"
+#include "AliITSgeomSPD.h"
 #include "AliITSgeomSSD.h"
-
+#include "AliITShit.h"
+#include "AliITSresponseSDD.h"
+#include "AliITSresponseSPD.h"
+#include "AliITSresponseSSD.h"
+#include "AliITSsegmentationSDD.h"
+#include "AliITSsegmentationSPD.h"
+#include "AliITSsegmentationSSD.h"
+#include "AliITSsimulationSDD.h"
+#include "AliITSsimulationSPD.h"
+#include "AliITSsimulationSSD.h"
+#include "AliITSvPPRsymm.h"
+#include "AliMagF.h"
+#include "AliRun.h"
 
 ClassImp(AliITSvPPRsymm)
  
 //_____________________________________________________________________________
-AliITSvPPRsymm::AliITSvPPRsymm() {
+AliITSvPPRsymm::AliITSvPPRsymm() : AliITSvPPRasymm() {
 ////////////////////////////////////////////////////////////////////////
 //    Standard default constructor for the ITS version 9.
 ////////////////////////////////////////////////////////////////////////
-    Int_t i;
-
-    fIdN       = 6;
-    fIdName    = 0;
-    fIdSens    = 0;
-    fEuclidOut    = kFALSE; // Don't write Euclide file
-    fGeomDetOut   = kFALSE; // Don't write .det file
-    fGeomDetIn    = kTRUE; // Read .det file
-    fMajorVersion = IsVersion();
-    fMinorVersion = -1;
-    for(i=0;i<60;i++) fRead[i] = '\0';
-    for(i=0;i<60;i++) fWrite[i] = '\0';
-    for(i=0;i<60;i++) fEuclidGeomDet[i] = '\0';
 }
 //_____________________________________________________________________________
-AliITSvPPRsymm::AliITSvPPRsymm(const char *name, const char *title) : AliITS(name, title){
+AliITSvPPRsymm::AliITSvPPRsymm(const char *name, const char *title) : AliITSvPPRasymm(name, title){
 ////////////////////////////////////////////////////////////////////////
 //    Standard constructor for the ITS version 9.
 ////////////////////////////////////////////////////////////////////////
-    Int_t i;
-
-    fIdN = 6;
-    fIdName = new TString[fIdN];
-    fIdName[0] = "ITS1";
-    fIdName[1] = "ITS2";
-    fIdName[2] = "ITS3";
-    fIdName[3] = "ITS4";
-    fIdName[4] = "ITS5";
-    fIdName[5] = "ITS6";
-    fIdSens    = new Int_t[fIdN];
-    for (i=0;i<fIdN;i++) fIdSens[i] = 0;
-    fMajorVersion = IsVersion();
-    fMinorVersion = 1;
-    fEuclidOut    = kFALSE; // Don't write Euclide file
-    fGeomDetOut   = kFALSE; // Don't write .det file
-    fGeomDetIn    = kTRUE; // Read .det file
-
-    fEuclidGeometry="$ALICE_ROOT/ITS/ITSgeometry_PPRsymm.euc";
-    strncpy(fEuclidGeomDet,"$ALICE_ROOT/ITS/ITSgeometry_PPR.det",60);
-    strncpy(fRead,fEuclidGeomDet,60);
-    strncpy(fWrite,fEuclidGeomDet,60);
-
-}
-//____________________________________________________________________________
-AliITSvPPRsymm::AliITSvPPRsymm(const AliITSvPPRsymm &source){
-////////////////////////////////////////////////////////////////////////
-//     Copy Constructor for ITS version 9.
-////////////////////////////////////////////////////////////////////////
-    if(&source == this) return;
-    Warning("Copy Constructor","Not allowed to copy AliITSvPPRsymm");
-    return;
-}
-//_____________________________________________________________________________
-AliITSvPPRsymm& AliITSvPPRsymm::operator=(const AliITSvPPRsymm &source){
-////////////////////////////////////////////////////////////////////////
-//    Assignment operator for the ITS version 7.
-////////////////////////////////////////////////////////////////////////
-    if(&source == this) return *this;
-    Warning("= operator","Not allowed to copy AliITSvPPRsymm");
-    return *this;
 }
 //_____________________________________________________________________________
 AliITSvPPRsymm::~AliITSvPPRsymm() {
 ////////////////////////////////////////////////////////////////////////
-//    Standard destructor for the ITS version 7.
+//    Standard destructor for the ITS version 9.
 ////////////////////////////////////////////////////////////////////////
 }
-//__________________________________________________________________________
-void AliITSvPPRsymm::BuildGeometry(){
-////////////////////////////////////////////////////////////////////////
-//    Geometry builder for the ITS version 9.
-////////////////////////////////////////////////////////////////////////
-    TNode *node, *top;
-    const int kColorITS=kYellow;
-    //
-    top = gAlice->GetGeometry()->GetNode("alice");
-
-    new TTUBE("S_layer1","Layer1 of ITS","void",3.95,3.95+0.05475,12.25);
-    top->cd();
-    node = new TNode("Layer1","Layer1","S_layer1",0,0,0,"");
-    node->SetLineColor(kColorITS);
-    fNodes->Add(node);
-
-    new TTUBE("S_layer2","Layer2 of ITS","void",7.,7.+0.05475,16.3);
-    top->cd();
-    node = new TNode("Layer2","Layer2","S_layer2",0,0,0,"");
-    node->SetLineColor(kColorITS);
-    fNodes->Add(node);
-
-    new TTUBE("S_layer3","Layer3 of ITS","void",15.,15.+0.05288,21.1);
-    top->cd();
-    node = new TNode("Layer3","Layer3","S_layer3",0,0,0,"");
-    node->SetLineColor(kColorITS);
-    fNodes->Add(node);
-
-    new TTUBE("S_layer4","Layer4 of ITS","void",24,24+0.05288,29.6);
-    top->cd();
-    node = new TNode("Layer4","Layer4","S_layer4",0,0,0,"");
-    node->SetLineColor(kColorITS);
-    fNodes->Add(node);
-
-    new TTUBE("S_layer5","Layer5 of ITS","void",40,40+0.05382,45.1);
-    top->cd();
-    node = new TNode("Layer5","Layer5","S_layer5",0,0,0,"");
-    node->SetLineColor(kColorITS);
-    fNodes->Add(node);
-
-    new TTUBE("S_layer6","Layer6 of ITS","void",45,45+0.05382,50.4);
-    top->cd();
-    node = new TNode("Layer6","Layer6","S_layer6",0,0,0,"");
-    node->SetLineColor(kColorITS);
-    fNodes->Add(node);
-}
 //_____________________________________________________________________________
 void AliITSvPPRsymm::CreateGeometry(){
 ////////////////////////////////////////////////////////////////////////
@@ -273,80 +100,339 @@ void AliITSvPPRsymm::CreateGeometry(){
 ////////////////////////////////////////////////////////////////////////
   
   //INNER RADII OF THE SILICON LAYERS 
-  //  Float_t rl[6]    = { 3.8095,7.,15.,24.,38.1,43.5765 };   
+  // Float_t rl[6]    = { 3.8095,7.,15.,24.,38.1,43.5765 };   
   //THICKNESSES OF LAYERS (in % radiation length)
   Float_t drl[6]   = { 1.03,1.03,0.94,0.95,0.91,0.87 };   
   //HALF LENGTHS OF LAYERS  
-  /*
-  Float_t dzl[6]   = { 14.35,14.35,25.1,32.1,49.405,55.27 };
+  // Float_t dzl[6]   = { 14.35,14.35,25.1,32.1,49.405,55.27 };
   //LENGTHS OF END-LADDER BOXES (ALL INCLUDED)
-  Float_t dzb[6]   = { 12.4,12.4,13.5,15.,7.5,7.5 };    
+  // Float_t dzb[6]   = { 12.4,12.4,13.5,15.,7.5,7.5 };   
   //THICKNESSES OF END-LADDER BOXES (ALL INCLUDED)
-  Float_t drb[6]   = { rl[1]-rl[0],0.2,5.,5.,4.,4. };         
-  */
+  // Float_t drb[6]   = { rl[1]-rl[0],0.2,5.,5.,4.,4. };        
 
  
-  Float_t dits[50], rlim, zmax;
-  Float_t xltpc;
-  Int_t idrotm[999], i;
-  Float_t dgh[50];
+  Float_t dits[100], rlim, zmax;
+  // Float_t zpos;
+  // Float_t pcits[50]
+  Float_t ztpc;
+  Int_t idrotm[1999], i;
+  Float_t dgh[100];
+
+
+  // Define some variables for SPD
+
+  Float_t dits1[3], di101[3], di107[3], di10b[3], di106[3];  // for layer 1 
+  Float_t di103[3], di10a[3], di102[3];                      // for layer 1
+  Float_t dits2[3], di1d1[3], di1d7[3], di20b[3], di1d6[3];  // for layer 2
+  Float_t di1d3[3], di20a[3], di1d2[3];                      // for layer 2  
+  Float_t di108[3], di104[3];                                // for both layers  
+
+  Float_t ddet1=200.;     // total detector thickness on layer 1 (micron)
+  Float_t dchip1=200.;    // total chip thickness on layer 1 (micron)
+  
+  Float_t ddet2=200.;     // total detector thickness on layer 2 (micron)                         
+  Float_t dchip2=200.;    // total chip thickness on layer 2 (micron)
+  
+  Float_t dbus=300.;      // total bus thickness on both layers (micron)
+
+  ddet1 = GetThicknessDet1();
+  ddet2 = GetThicknessDet2();
+  dchip1 = GetThicknessChip1();
+  dchip2 = GetThicknessChip2();    
+
+  if(ddet1 < 100. || ddet1 > 300.) {
+     cout << "ITS - WARNING: the detector thickness for layer 1 is outside the range of [100,300] microns."
+         " The default value of 200 microns will be used." << endl;
+         ddet1=200.;
+  }
+  
+  if(ddet2 < 100. || ddet2 > 300.) {
+     cout << "ITS - WARNING: the detector thickness for layer 2 is outside the range of [100,300] microns."
+         " The default value of 200 microns will be used." << endl;
+         ddet2=200.;
+  }
+  
+  if(dchip1 < 100. || dchip1 > 300.) {
+     cout << "ITS - WARNING: the chip thickness for layer 1 is outside the range of [100,300] microns."
+         " The default value of 200 microns will be used." << endl;
+         dchip1=200.;
+  }
+  
+  if(dchip2 < 100. || dchip2 > 300.) {
+     cout << "ITS - WARNING: the chip thickness for layer 2 is outside the range of [100,300] microns."
+         " The default value of 200 microns will be used." << endl;
+         dchip2=200.;
+  }      
+
+  Int_t rails = 1;       // flag for rails (1 --> rails in; 0 --> rails out)
+  
+  Int_t fluid = 1;       // flag for the cooling fluid (1 --> water; 0 --> freon)
+
+  rails = GetRails();
+
+  fluid = GetCoolingFluid();
+
+  if(rails != 0 && rails != 1) {
+     cout << "ITS - WARNING: the switch for rails is not set neither to 0 (rails out) nor to 1 (rails in)." 
+     " The default value of 1 (rails in) will be used." << endl;
+       
+  }  
+  
+  if(fluid != 0 && fluid != 1) {
+     cout << "ITS - WARNING: the switch for cooling fluid is not set neither to 0 (freon) nor to 1 (water)." 
+     " The default value of 1 (water) will be used." << endl;  
+  }       
+   
+  cout << "ITS: Detector thickness on layer 1 is set to " << ddet1 << " microns." << endl;
+  cout << "ITS: Chip thickness on layer 1 is set to " << dchip1 << " microns." << endl;
+  cout << "ITS: Detector thickness on layer 2 is set to " << ddet2 << " microns." << endl;
+  cout << "ITS: Chip thickness on layer 2 is set to " << dchip2 << " microns." << endl;
+  if(rails == 0 ) {
+     cout << "ITS: Rails are out." << endl; 
+  } else {
+     cout << "ITS: Rails are in." << endl;
+  }   
+  if(fluid == 0 ) {
+     cout << "ITS: The cooling fluid is freon." << endl; 
+  } else {
+     cout << "ITS: The cooling fluid is water." << endl;
+  }   
+
+  ddet1  = ddet1*0.0001/2.; // conversion from tot length in um to half in cm
+  ddet2  = ddet2*0.0001/2.; // conversion from tot length in um to half in cm  
+  dchip1 = dchip1*0.0001/2.;// conversion from tot length in um to half in cm  
+  dchip2 = dchip2*0.0001/2.;// conversion from tot length in um to half in cm  
+  dbus   = dbus*0.0001/2.;  // conversion from tot length in um to half in cm       
+               
+  Float_t deltax, deltay; 
+
+  Int_t thickness = GetMinorVersion()/10;
+  Int_t option    = GetMinorVersion() - 10*thickness;
+
+
+  // Define some variables for SDD
+
+
+  Float_t sin30, cos30;
+
+  // SDD electronics+services main volumes
+  Float_t I018dits[3], I024dits[3], I047dits[3], I048dits[3];
+
+  // SDD detector ladder
+
+  Float_t I302dits[3], I402dits[3], I004dits[3], I005dits[3];
+  Float_t Y_SDD_sep = 0.20;
+  Float_t ySDD;
+  Int_t   iSDD;
+  Float_t Z_SDD_lay3[6] = {18.55, 10.95, 3.70, -3.70, -11.20, -18.35};
+  Float_t Z_SDD_lay4[8] = {25.75, 18.60, 11.00, 3.70, -3.70, -11.20, -18.45, -26.05};
+
+  // ladder foot and end-ladder (frame and cooling)
+  Float_t I028dits[3], I420dits[3], I421dits[3], I422dits[6], I423dits[3];
+  Float_t I424dits[3], xI424, yI424;
+  Float_t I425dits[3];
+  Int_t    indI425;
+  Float_t I029dits[4], I030dits[4], I031dits[3], I032dits[3];
+
+  // SDD ladder frame and cooling
+  Float_t SDD_CoolPipe[3] = {1.7000, -0.5500, 0.0000};
+  Float_t I035dits[3], I037dits[3], I038dits[3];
+  Float_t I039dits[3], xI039, yI039;
+  Float_t I041dits[5];
+
+  // SDD hybrid, chips and capacitors
+  Float_t I050dits[3], xI050, yI050;
+  Float_t I052dits[3], xI052, yI052;
+  Float_t I042dits[3], xI042, yI042;
+  Float_t xI042space = 0.17;
+  Float_t I043dits[3], xI043, yI043;
+  Float_t xI043space = 0.17;
+  Float_t zchip, zChipSpace;
+  Float_t I051dits[3], xI051, yI051, zI051, yI051space, xcap;
+  Int_t     ichip, icap;
+
+  // SDD microcables
+  Float_t I044dits[4], xI044, yI044, volI044;
+  Float_t xHV, yHV, zHV, xLV, yLV, zLV;
+  Char_t   HVname[5], LVname[5];
+
+
+  // Define media off-set
   
   Int_t *idtmed = fIdtmed->GetArray()-199;
+
   
   // Rotation matrices
   
-  // SPD - version 'a'
-  
-  AliMatrix(idrotm[201],90.0,90.0,90.0,180.0,0.0,0.0);
-  AliMatrix(idrotm[202],90.0,90.0,90.0,0.0,0.0,0.0);
-  AliMatrix(idrotm[203],90.0,350.0,90.0,260.0,0.0,0.0);
-  AliMatrix(idrotm[204],90.0,170.0,90.0,80.0,0.0,0.0);
-  AliMatrix(idrotm[205],90.0,10.0,90.0,100.0,0.0,0.0);
-  AliMatrix(idrotm[206],90.0,190.0,90.0,280.0,0.0,0.0);
-  AliMatrix(idrotm[207],90.0,342.0,90.0,72.0,0.0,0.0);
-  AliMatrix(idrotm[208],90.0,156.999893,90.0,246.999893,0.0,0.0);
-  AliMatrix(idrotm[209],90.0,147.999802,90.0,237.999893,0.0,0.0);
-  AliMatrix(idrotm[210],90.0,138.999802,90.0,228.999802,0.0,0.0);
-  AliMatrix(idrotm[211],90.0,129.999802,90.0,219.999802,0.0,0.0);
-  AliMatrix(idrotm[212],90.0,36.7896,90.0,126.789597,0.0,0.0);
-  AliMatrix(idrotm[213],90.0,343.579712,90.0,73.579697,0.0,0.0);
-  AliMatrix(idrotm[214],90.0,95.413696,90.0,185.413696,0.0,0.0);
-  AliMatrix(idrotm[215],90.0,5.4141,90.0,95.414101,0.0,0.0);
-  AliMatrix(idrotm[216],90.0,318.296906,90.0,48.296902,0.0,0.0);
-  AliMatrix(idrotm[217],90.0,67.000099,90.0,157.000107,0.0,0.0);
-  AliMatrix(idrotm[218],90.0,337.003998,90.0,67.003998,0.0,0.0);
-  AliMatrix(idrotm[219],90.0,247.000305,90.0,337.000305,0.0,0.0);
-  AliMatrix(idrotm[220],90.0,305.633514,90.0,35.633499,0.0,0.0);
-  AliMatrix(idrotm[221],90.0,58.000198,90.0,148.000198,0.0,0.0);
-  AliMatrix(idrotm[222],90.0,327.997101,90.0,57.997101,0.0,0.0 );
-  AliMatrix(idrotm[223],90.0,237.994202,90.0,327.994202,0.0,0.0);
-  AliMatrix(idrotm[224],90.0,296.627502,90.0,26.627399,0.0,0.0);
-  AliMatrix(idrotm[225],90.0,48.994099,90.0,138.994095,0.0,0.0);
-  AliMatrix(idrotm[226],90.0,318.990997,90.0,48.991001,0.0,0.0);
-  AliMatrix(idrotm[227],90.0,228.988205,90.0,318.98819,0.0,0.0);
-  AliMatrix(idrotm[228],90.0,287.621399,90.0,17.621401,0.0,0.0);
-  AliMatrix(idrotm[229],90.0,39.988098,90.0,129.988098,0.0,0.0);
-  AliMatrix(idrotm[230],90.0,309.984985,90.0,39.985001,0.0,0.0);
-  AliMatrix(idrotm[231],90.0,327.2612,90.0,57.2612,0.0,0.0);
-  AliMatrix(idrotm[232],90.0,237.261398,90.0,327.261414,0.0,0.0);
-  AliMatrix(idrotm[233],90.0,252.000504,90.0,342.000488,0.0,0.0 );
-  AliMatrix(idrotm[234],90.0,71.9991,90.0,161.9991,0.0,0.0);
-  AliMatrix(idrotm[235],90.0,270.0,90.0,0.0,0.0,0.0);
-  AliMatrix(idrotm[236],90.0,180.013702,90.0,270.013702,0.0,0.0);
-  AliMatrix(idrotm[237],90.0,0.0,90.0,90.0,180.0,0.0);
-  AliMatrix(idrotm[238],90.0,144.0,90.0,234.0,0.0,0.0);
-  AliMatrix(idrotm[239],90.0,216.0,90.0,306.0,0.0,0.0);
-  AliMatrix(idrotm[240],90.0,288.0,90.0,18.0,0.0,0.0);
-  AliMatrix(idrotm[241],90.0,324.0,90.0,54.0,0.0,0.0);
-  AliMatrix(idrotm[242],90.0,36.0,90.0,126.0,0.0,0.0);
-  AliMatrix(idrotm[243],90.0,108.0,90.0,198.0,0.0,0.0);
-  AliMatrix(idrotm[244],90.0,0.0,90.0,270.0,180.0,0.0);
-  AliMatrix(idrotm[245],90.0,342.0,90.0,252.0,180.0,0.0);
-  AliMatrix(idrotm[246],90.0,130.0,90.0,40.0,180.0,0.0);
-  AliMatrix(idrotm[247],90.0,139.0,90.0,49.0,180.0,0.0);
-  AliMatrix(idrotm[248],90.0,148.0,90.0,58.0,180.0,0.0);
-  AliMatrix(idrotm[249],90.0,157.0,90.0,67.0,180.0,0.0);
+  // SPD - option 'a' (this is NOT the default so leave commented)
+  
+  
+  if (option == 1) {
+  
+     AliMatrix(idrotm[201],90.0,90.0,90.0,180.0,0.0,0.0);
+     AliMatrix(idrotm[202],90.0,90.0,90.0,0.0,0.0,0.0);
+     AliMatrix(idrotm[203],90.0,350.0,90.0,260.0,0.0,0.0);
+     AliMatrix(idrotm[204],90.0,170.0,90.0,80.0,0.0,0.0);
+     AliMatrix(idrotm[205],90.0,10.0,90.0,100.0,0.0,0.0);
+     AliMatrix(idrotm[206],90.0,190.0,90.0,280.0,0.0,0.0);
+     AliMatrix(idrotm[207],90.0,342.0,90.0,72.0,0.0,0.0);
+     AliMatrix(idrotm[208],90.0,156.999893,90.0,246.999893,0.0,0.0);
+     AliMatrix(idrotm[209],90.0,147.999802,90.0,237.999893,0.0,0.0);
+     AliMatrix(idrotm[210],90.0,138.999802,90.0,228.999802,0.0,0.0);
+     AliMatrix(idrotm[211],90.0,129.999802,90.0,219.999802,0.0,0.0);
+     AliMatrix(idrotm[212],90.0,36.7896,90.0,126.789597,0.0,0.0);
+     AliMatrix(idrotm[213],90.0,343.579712,90.0,73.579697,0.0,0.0);
+     AliMatrix(idrotm[214],90.0,95.413696,90.0,185.413696,0.0,0.0);
+     AliMatrix(idrotm[215],90.0,5.4141,90.0,95.414101,0.0,0.0);
+     AliMatrix(idrotm[216],90.0,318.296906,90.0,48.296902,0.0,0.0);
+     AliMatrix(idrotm[217],90.0,67.000099,90.0,157.000107,0.0,0.0);
+     AliMatrix(idrotm[218],90.0,337.003998,90.0,67.003998,0.0,0.0);
+     AliMatrix(idrotm[219],90.0,247.000305,90.0,337.000305,0.0,0.0);
+     AliMatrix(idrotm[220],90.0,305.633514,90.0,35.633499,0.0,0.0);
+     AliMatrix(idrotm[221],90.0,58.000198,90.0,148.000198,0.0,0.0);
+     AliMatrix(idrotm[222],90.0,327.997101,90.0,57.997101,0.0,0.0 );
+     AliMatrix(idrotm[223],90.0,237.994202,90.0,327.994202,0.0,0.0);
+     AliMatrix(idrotm[224],90.0,296.627502,90.0,26.627399,0.0,0.0);
+     AliMatrix(idrotm[225],90.0,48.994099,90.0,138.994095,0.0,0.0);
+     AliMatrix(idrotm[226],90.0,318.990997,90.0,48.991001,0.0,0.0);
+     AliMatrix(idrotm[227],90.0,228.988205,90.0,318.98819,0.0,0.0);
+     AliMatrix(idrotm[228],90.0,287.621399,90.0,17.621401,0.0,0.0);
+     AliMatrix(idrotm[229],90.0,39.988098,90.0,129.988098,0.0,0.0);
+     AliMatrix(idrotm[230],90.0,309.984985,90.0,39.985001,0.0,0.0);
+     AliMatrix(idrotm[231],90.0,327.2612,90.0,57.2612,0.0,0.0);
+     AliMatrix(idrotm[232],90.0,237.261398,90.0,327.261414,0.0,0.0);
+     AliMatrix(idrotm[233],90.0,252.000504,90.0,342.000488,0.0,0.0 );
+     AliMatrix(idrotm[234],90.0,71.9991,90.0,161.9991,0.0,0.0);
+     AliMatrix(idrotm[235],90.0,270.0,90.0,0.0,0.0,0.0);
+     AliMatrix(idrotm[236],90.0,180.013702,90.0,270.013702,0.0,0.0);
+     AliMatrix(idrotm[237],90.0,180.0,90.0,90.0,0.0,0.0);
+     AliMatrix(idrotm[238],90.0,144.0,90.0,234.0,0.0,0.0);
+     AliMatrix(idrotm[239],90.0,216.0,90.0,306.0,0.0,0.0);
+     AliMatrix(idrotm[240],90.0,288.0,90.0,18.0,0.0,0.0);
+     AliMatrix(idrotm[241],90.0,324.0,90.0,54.0,0.0,0.0);
+     AliMatrix(idrotm[242],90.0,36.0,90.0,126.0,0.0,0.0);
+     AliMatrix(idrotm[243],90.0,108.0,90.0,198.0,0.0,0.0);
+     AliMatrix(idrotm[244],90.0,180.0,90.0,270.0,0.0,0.0);
+     AliMatrix(idrotm[245],90.0,162.0,90.0,252.0,0.0,0.0);
+     AliMatrix(idrotm[246],90.0,310.0,90.0,40.0,0.0,0.0);
+     AliMatrix(idrotm[247],90.0,319.0,90.0,49.0,0.0,0.0);
+     AliMatrix(idrotm[248],90.0,328.0,90.0,58.0,0.0,0.0);
+     AliMatrix(idrotm[249],90.0,337.0,90.0,67.0,0.0,0.0);
+     AliMatrix(idrotm[1003],90.0,73.5,90.0,163.5,0.0,0.0);
+     AliMatrix(idrotm[1011],90.0,342.0,90.0,72.0,0.0,0.0);
+     AliMatrix(idrotm[1039],90.0,72.0,90.0,162.0,0.0,0.0);
+     AliMatrix(idrotm[1043],90.0,66.91,90.0,156.91,0.0,0.0);
+     AliMatrix(idrotm[1065],90.0,144.0,90.0,234.0,0.0,0.0);
+     AliMatrix(idrotm[1078],90.0,180.0,90.0,270.0,0.0,0.0);
+     AliMatrix(idrotm[1088],90.0,57.41,90.0,147.41,0.0,0.0);
+     AliMatrix(idrotm[1089],90.0,333.0,90.0,63.0,0.0,0.0);
+     AliMatrix(idrotm[1090],90.0,351.0,90.0,81.0,0.0,0.0);
+     AliMatrix(idrotm[1091],90.0,216.0,90.0,306.0,0.0,0.0);
+     AliMatrix(idrotm[1092],90.0,27.0,90.0,117.0,0.0,0.0);
+     AliMatrix(idrotm[1093],90.0,18.0,90.0,108.0,0.0,0.0);
+     AliMatrix(idrotm[1094],90.0,9.0,90.0,99.0,0.0,0.0);
+     AliMatrix(idrotm[1104],90.0,252.0,90.0,342.0,0.0,0.0);
+     AliMatrix(idrotm[1106],90.0,36.0,90.0,126.0,0.0,0.0);
+     AliMatrix(idrotm[1107],90.0,108.0,90.0,198.0,0.0,0.0);
+     AliMatrix(idrotm[1108],90.0,324.0,90.0,54.0,180.0,0.0);
+     AliMatrix(idrotm[1109],90.0,0.0,90.0,90.0,180.0,0.0);
+     AliMatrix(idrotm[1110],90.0,36.0,90.0,126.0,180.0,0.0);
+     AliMatrix(idrotm[1111],90.0,72.0,90.0,162.0,180.0,0.0);
+     AliMatrix(idrotm[1112],90.0,108.0,90.0,198.0,180.0,0.0);
+     AliMatrix(idrotm[1113],90.0,144.0,90.0,234.0,180.0,0.0);
+     AliMatrix(idrotm[1114],90.0,180.0,90.0,270.0,180.0,0.0);
+     AliMatrix(idrotm[1115],90.0,216.0,90.0,306.0,180.0,0.0);
+     AliMatrix(idrotm[1116],90.0,252.0,90.0,342.0,180.0,0.0);
+     AliMatrix(idrotm[1117],90.0,288.0,90.0,18.0,0.0,0.0);
+     AliMatrix(idrotm[1118],90.0,288.0,90.0,18.0,180.0,0.0);
+     AliMatrix(idrotm[1130],90.0,324.0,90.0,54.0,0.0,0.0);  
+
+  }
   
+  // SPD - option 'b' (this is the default)  
+    
+  if (option == 2) {
+
+     AliMatrix(idrotm[201],90.0,0.0,90.0,90.0,0.0,0.0);
+     AliMatrix(idrotm[202],90.0,90.0,90.0,0.0,0.0,0.0);
+     AliMatrix(idrotm[203],90.0,350.0,90.0,260.0,0.0,0.0);
+     AliMatrix(idrotm[204],90.0,170.0,90.0,80.0,0.0,0.0);
+     AliMatrix(idrotm[205],90.0,10.0,90.0,100.0,0.0,0.0);
+     AliMatrix(idrotm[206],90.0,190.0,90.0,280.0,0.0,0.0);
+     AliMatrix(idrotm[207],90.0,342.0,90.0,72.0,0.0,0.0);
+     AliMatrix(idrotm[208],90.0,156.999893,90.0,246.999893,0.0,0.0);
+     AliMatrix(idrotm[209],90.0,147.999802,90.0,237.999893,0.0,0.0);
+     AliMatrix(idrotm[210],90.0,138.999802,90.0,228.999802,0.0,0.0);
+     AliMatrix(idrotm[211],90.0,129.999802,90.0,219.999802,0.0,0.0);
+     AliMatrix(idrotm[212],90.0,36.7896,90.0,126.789597,0.0,0.0);
+     AliMatrix(idrotm[213],90.0,343.579712,90.0,73.579697,0.0,0.0);
+     AliMatrix(idrotm[214],90.0,95.413696,90.0,185.413696,0.0,0.0);
+     AliMatrix(idrotm[215],90.0,5.4141,90.0,95.414101,0.0,0.0);
+     AliMatrix(idrotm[216],90.0,318.296906,90.0,48.296902,0.0,0.0);
+     AliMatrix(idrotm[217],90.0,67.000099,90.0,157.000107,0.0,0.0);
+     AliMatrix(idrotm[218],90.0,337.003998,90.0,67.003998,0.0,0.0);
+     AliMatrix(idrotm[219],90.0,247.000305,90.0,337.000305,0.0,0.0);
+     AliMatrix(idrotm[220],90.0,305.633514,90.0,35.633499,0.0,0.0);
+     AliMatrix(idrotm[221],90.0,58.000198,90.0,148.000198,0.0,0.0);
+     AliMatrix(idrotm[222],90.0,327.997101,90.0,57.997101,0.0,0.0);
+     AliMatrix(idrotm[223],90.0,237.994202,90.0,327.994202,0.0,0.0);
+     AliMatrix(idrotm[224],90.0,296.627502,90.0,26.627399,0.0,0.0);
+     AliMatrix(idrotm[225],90.0,48.994099,90.0,138.994095,0.0,0.0);
+     AliMatrix(idrotm[226],90.0,318.990997,90.0,48.991001,0.0,0.0);
+     AliMatrix(idrotm[227],90.0,228.988205,90.0,318.98819,0.0,0.0);
+     AliMatrix(idrotm[228],90.0,287.621399,90.0,17.621401,0.0,0.0);
+     AliMatrix(idrotm[229],90.0,39.988098,90.0,129.988098,0.0,0.0);
+     AliMatrix(idrotm[230],90.0,309.984985,90.0,39.985001,0.0,0.0);
+     AliMatrix(idrotm[231],90.0,327.2612,90.0,57.2612,0.0,0.0);
+     AliMatrix(idrotm[232],90.0,237.261398,90.0,327.261414,0.0,0.0);
+     AliMatrix(idrotm[233],90.0,252.000504,90.0,342.000488,0.0,0.0);
+     AliMatrix(idrotm[234],90.0,71.9991,90.0,161.9991,0.0,0.0);
+     AliMatrix(idrotm[235],90.0,270.0,90.0,0.0,0.0,0.0);
+     AliMatrix(idrotm[236],90.0,180.013702,90.0,270.013702,0.0,0.0);
+     AliMatrix(idrotm[237],90.0,90.0,90.0,180.0,0.0,0.0);
+     AliMatrix(idrotm[238],90.0,180.0,90.0,270.0,0.0,0.0);
+     AliMatrix(idrotm[239],90.0,162.0,90.0,252.0,0.0,0.0);
+     AliMatrix(idrotm[240],90.0,310.0,90.0,40.0,0.0,0.0);
+     AliMatrix(idrotm[241],90.0,319.0,90.0,49.0,0.0,0.0);
+     AliMatrix(idrotm[242],90.0,328.0,90.0,58.0,0.0,0.0);
+     AliMatrix(idrotm[243],90.0,337.0,90.0,67.0,0.0,0.0);
+     AliMatrix(idrotm[244],90.0,216.0,90.0,306.0,0.0,0.0);
+     AliMatrix(idrotm[245],90.0,36.0,90.0,126.0,0.0,0.0);
+     AliMatrix(idrotm[246],90.0,108.0,90.0,198.0,0.0,0.0);
+     AliMatrix(idrotm[247],90.0,144.0,90.0,234.0,0.0,0.0);
+     AliMatrix(idrotm[248],90.0,288.0,90.0,18.0,0.0,0.0);
+     AliMatrix(idrotm[249],90.0,324.0,90.0,54.0,0.0,0.0);  
+     AliMatrix(idrotm[1003],90.0,73.5,90.0,163.5,0.0,0.0);
+     AliMatrix(idrotm[1011],90.0,342.0,90.0,72.0,0.0,0.0);
+     AliMatrix(idrotm[1039],90.0,72.0,90.0,162.0,0.0,0.0);
+     AliMatrix(idrotm[1043],90.0,66.91,90.0,156.91,0.0,0.0);
+     AliMatrix(idrotm[1065],90.0,144.0,90.0,234.0,0.0,0.0);
+     AliMatrix(idrotm[1078],90.0,180.0,90.0,270.0,0.0,0.0);
+     AliMatrix(idrotm[1088],90.0,57.41,90.0,147.41,0.0,0.0);
+     AliMatrix(idrotm[1089],90.0,333.0,90.0,63.0,0.0,0.0);
+     AliMatrix(idrotm[1090],90.0,351.0,90.0,81.0,0.0,0.0);
+     AliMatrix(idrotm[1091],90.0,216.0,90.0,306.0,0.0,0.0);
+     AliMatrix(idrotm[1092],90.0,27.0,90.0,117.0,0.0,0.0);
+     AliMatrix(idrotm[1093],90.0,18.0,90.0,108.0,0.0,0.0);
+     AliMatrix(idrotm[1094],90.0,9.0,90.0,99.0,0.0,0.0);
+     AliMatrix(idrotm[1104],90.0,252.0,90.0,342.0,0.0,0.0);
+     AliMatrix(idrotm[1106],90.0,36.0,90.0,126.0,0.0,0.0);
+     AliMatrix(idrotm[1107],90.0,108.0,90.0,198.0,0.0,0.0);
+     AliMatrix(idrotm[1108],90.0,324.0,90.0,54.0,180.0,0.0);
+     AliMatrix(idrotm[1109],90.0,0.0,90.0,90.0,180.0,0.0);
+     AliMatrix(idrotm[1110],90.0,36.0,90.0,126.0,180.0,0.0);
+     AliMatrix(idrotm[1111],90.0,72.0,90.0,162.0,180.0,0.0);
+     AliMatrix(idrotm[1112],90.0,108.0,90.0,198.0,180.0,0.0);
+     AliMatrix(idrotm[1113],90.0,144.0,90.0,234.0,180.0,0.0);
+     AliMatrix(idrotm[1114],90.0,180.0,90.0,270.0,180.0,0.0);
+     AliMatrix(idrotm[1115],90.0,216.0,90.0,306.0,180.0,0.0);
+     AliMatrix(idrotm[1116],90.0,252.0,90.0,342.0,180.0,0.0);
+     AliMatrix(idrotm[1117],90.0,288.0,90.0,18.0,0.0,0.0);
+     AliMatrix(idrotm[1118],90.0,288.0,90.0,18.0,180.0,0.0);
+     AliMatrix(idrotm[1130],90.0,324.0,90.0,54.0,0.0,0.0);  
+
+  }
+    
   // SDD
   
   AliMatrix(idrotm[301],0.0,0.0,90.0,90.0,90.0,180.0);  
@@ -443,7 +529,7 @@ void AliITSvPPRsymm::CreateGeometry(){
   AliMatrix(idrotm[532],90.0,360.0,90.0,90.0,0.0,0.0);
   AliMatrix(idrotm[533],90.0,180.0,90.0,270.0,0.0,0.0); 
   AliMatrix(idrotm[534],90.0,189.47,90.0,279.47,0.0,0.0);  
-  AliMatrix(idrotm[535],90.0,198.95,90.0,288.95,0.0,0.0 );  
+  AliMatrix(idrotm[535],90.0,198.95,90.0,288.95,0.0,0.0);  
   AliMatrix(idrotm[537],90.0,217.89,90.0,307.89,0.0,0.0);  
   AliMatrix(idrotm[538],90.0,227.37,90.0,317.37,0.0,0.0);
   AliMatrix(idrotm[539],90.0,236.84,90.0,326.84,0.0,0.0);
@@ -460,7 +546,7 @@ void AliITSvPPRsymm::CreateGeometry(){
   AliMatrix(idrotm[550],90.0,341.05,90.0,71.05,0.0,0.0);  
   AliMatrix(idrotm[551],90.0,350.53,90.0,80.53,0.0,0.0);
   AliMatrix(idrotm[552],90.0,9.47,90.0,99.47,0.0,0.0);
-  AliMatrix(idrotm[553],90.0,18.95,90.0,108.95,0.0,0.0 ); 
+  AliMatrix(idrotm[553],90.0,18.95,90.0,108.95,0.0,0.0); 
   AliMatrix(idrotm[555],90.0,37.89,90.0,127.89,0.0,0.0);  
   AliMatrix(idrotm[556],90.0,47.37,90.0,137.37,0.0,0.0);  
   AliMatrix(idrotm[557],90.0,56.84,90.0,146.84,0.0,0.0);  
@@ -495,632 +581,1427 @@ void AliITSvPPRsymm::CreateGeometry(){
   AliMatrix(idrotm[633],132.46,0.0,90.0,90.0,42.46,360.0);
   AliMatrix(idrotm[653],90.0,21.18,90.0,111.18,0.0,0.0); 
 
+  
+  // SDD cone
+
+  AliMatrix(idrotm[846],90.0,300.0,90.0,30.0,0.0,0.0);
+  AliMatrix(idrotm[851],90.0,305.0,90.0,35.0,0.0,0.0);
+  AliMatrix(idrotm[853],90.0,60.0,90.0,150.0,0.0,0.0);
+  AliMatrix(idrotm[856],90.0,0.0,90.0,90.0,180.0,0.0);
+  AliMatrix(idrotm[857],90.0,5.0,90.0,95.0,180.0,0.0);
+  AliMatrix(idrotm[858],90.0,65.0,90.0,155.0,180.0,0.0);
+  AliMatrix(idrotm[859],90.0,305.0,90.0,35.0,180.0,0.0);
+  AliMatrix(idrotm[860],90.0,245.0,90.0,335.0,180.0,0.0);
+  AliMatrix(idrotm[861],90.0,185.0,90.0,275.0,180.0,0.0);
+  AliMatrix(idrotm[862],90.0,125.0,90.0,215.0,180.0,0.0);
+  AliMatrix(idrotm[863],90.0,257.5,90.0,347.5,180.0,0.0);
+  AliMatrix(idrotm[864],90.0,227.5,90.0,317.5,180.0,0.0);
+  AliMatrix(idrotm[865],90.0,197.5,90.0,287.5,180.0,0.0);
+  AliMatrix(idrotm[867],90.0,167.5,90.0,257.5,180.0,0.0);
+  AliMatrix(idrotm[868],90.0,287.5,90.0,17.5,0.0,0.0);  
+  AliMatrix(idrotm[869],90.0,137.5,90.0,227.5,180.0,0.0);
+  AliMatrix(idrotm[870],90.0,107.5,90.0,197.5,180.0,0.0);
+  AliMatrix(idrotm[871],90.0,77.5,90.0,167.5,180.0,0.0);
+  AliMatrix(idrotm[872],90.0,47.5,90.0,137.5,180.0,0.0);
+  AliMatrix(idrotm[873],90.0,17.5,90.0,107.5,180.0,0.0);
+  AliMatrix(idrotm[874],90.0,347.5,90.0,77.5,180.0,0.0);
+  AliMatrix(idrotm[875],90.0,317.5,90.0,47.5,180.0,0.0);
+  AliMatrix(idrotm[876],90.0,287.5,90.0,17.5,180.0,0.0);
+  AliMatrix(idrotm[877],90.0,185.0,90.0,275.0,0.0,0.0);
+  AliMatrix(idrotm[878],90.0,180.0,90.0,270.0,0.0,0.0);  
+  AliMatrix(idrotm[879],90.0,125.0,90.0,215.0,0.0,0.0);
+  AliMatrix(idrotm[880],90.0,65.0,90.0,155.0,0.0,0.0);
+  AliMatrix(idrotm[881],90.0,5.0,90.0,95.0,0.0,0.0);
+  AliMatrix(idrotm[882],90.0,245.0,90.0,335.0,0.0,0.0);
+  AliMatrix(idrotm[883],90.0,47.5,90.0,137.5,0.0,0.0);
+  AliMatrix(idrotm[884],90.0,77.5,90.0,167.5,0.0,0.0);
+  AliMatrix(idrotm[885],90.0,107.5,90.0,197.5,0.0,0.0);
+  AliMatrix(idrotm[887],90.0,137.5,90.0,227.5,0.0,0.0);
+  AliMatrix(idrotm[888],90.0,167.5,90.0,257.5,0.0,0.0);
+  AliMatrix(idrotm[889],90.0,197.5,90.0,287.5,0.0,0.0);
+  AliMatrix(idrotm[890],90.0,227.5,90.0,317.5,0.0,0.0);
+  AliMatrix(idrotm[891],90.0,347.5,90.0,77.5,0.0,0.0);
+  AliMatrix(idrotm[892],90.0,317.5,90.0,47.5,0.0,0.0);
+  AliMatrix(idrotm[893],90.0,257.5,90.0,347.5,0.0,0.0);
+  AliMatrix(idrotm[894],90.0,270.0,0.0,0.0,90.0,180.0);
+  AliMatrix(idrotm[895],90.0,286.36,0.0,0.0,90.0,196.36);
+  AliMatrix(idrotm[896],90.0,302.73,0.0,0.0,90.0,212.73);
+  AliMatrix(idrotm[897],90.0,319.09,0.0,0.0,90.0,229.09);
+  AliMatrix(idrotm[898],90.0,17.5,90.0,107.5,0.0,0.0);
+  AliMatrix(idrotm[899],90.0,335.45,0.0,0.0,90.0,245.45);
+  AliMatrix(idrotm[900],90.0,351.82,0.0,0.0,90.0,261.82);
+  AliMatrix(idrotm[901],90.0,8.18,0.0,0.0,90.0,278.18);
+  AliMatrix(idrotm[902],90.0,24.55,0.0,0.0,90.0,294.55);
+  AliMatrix(idrotm[903],90.0,40.91,0.0,0.0,90.0,310.91);
+  AliMatrix(idrotm[904],90.0,57.27,0.0,0.0,90.0,327.27);
+  AliMatrix(idrotm[905],90.0,73.64,0.0,0.0,90.0,343.64);
+  AliMatrix(idrotm[906],90.0,90.0,0.0,0.0,90.0,360.0);
+  AliMatrix(idrotm[907],90.0,106.36,0.0,0.0,90.0,16.36);
+  AliMatrix(idrotm[908],90.0,122.73,0.0,0.0,90.0,32.73);
+  AliMatrix(idrotm[909],90.0,139.09,0.0,0.0,90.0,49.09);
+  AliMatrix(idrotm[910],90.0,155.45,0.0,0.0,90.0,65.45);
+  AliMatrix(idrotm[911],90.0,171.82,0.0,0.0,90.0,81.82);
+  AliMatrix(idrotm[912],90.0,188.18,0.0,0.0,90.0,98.18);
+  AliMatrix(idrotm[913],90.0,204.55,0.0,0.0,90.0,114.55);
+  AliMatrix(idrotm[914],90.0,220.91,0.0,0.0,90.0,130.91);
+  AliMatrix(idrotm[915],90.0,237.27,0.0,0.0,90.0,147.27);
+  AliMatrix(idrotm[916],90.0,253.64,0.0,0.0,90.0,163.64);
+  AliMatrix(idrotm[917],90.0,295.71,0.0,0.0,90.0,205.71);
+  AliMatrix(idrotm[918],90.0,321.43,0.0,0.0,90.0,231.43);
+  AliMatrix(idrotm[919],90.0,347.14,0.0,0.0,90.0,257.14);
+  AliMatrix(idrotm[920],90.0,12.86,0.0,0.0,90.0,282.86);
+  AliMatrix(idrotm[921],90.0,38.57,0.0,0.0,90.0,308.57);
+  AliMatrix(idrotm[922],90.0,64.29,0.0,0.0,90.0,334.29);
+  AliMatrix(idrotm[923],90.0,115.71,0.0,0.0,90.0,25.71);
+  AliMatrix(idrotm[924],90.0,141.43,0.0,0.0,90.0,51.43);
+  AliMatrix(idrotm[925],90.0,167.14,0.0,0.0,90.0,77.14);
+  AliMatrix(idrotm[926],90.0,192.86,0.0,0.0,90.0,102.86);
+  AliMatrix(idrotm[927],90.0,218.57,0.0,0.0,90.0,128.57);
+  AliMatrix(idrotm[928],90.0,244.29,0.0,0.0,90.0,154.29);
+  AliMatrix(idrotm[929],90.0,120.0,90.0,210.0,0.0,0.0);
+  AliMatrix(idrotm[930],90.0,240.0,90.0,330.0,0.0,0.0);
+  AliMatrix(idrotm[931],90.0,60.0,90.0,150.0,180.0,0.0);
+  AliMatrix(idrotm[932],90.0,120.0,90.0,210.0,180.0,0.0);
+  AliMatrix(idrotm[933],90.0,180.0,90.0,270.0,180.0,0.0);
+  AliMatrix(idrotm[934],90.0,240.0,90.0,330.0,180.0,0.0);
+  AliMatrix(idrotm[935],90.0,300.0,90.0,30.0,180.0,0.0);
+
+  // SSD cone
+
+  AliMatrix(idrotm[701],90.0,0.0,90.0,90.0,180.0,0.0);
+  AliMatrix(idrotm[702],90.0,347.5,90.0,77.5,180.0,0.0);
+  AliMatrix(idrotm[703],90.0,17.5,90.0,107.5,180.0,0.0);
+  AliMatrix(idrotm[704],90.0,47.5,90.0,137.5,180.0,0.0);
+  AliMatrix(idrotm[705],90.0,77.5,90.0,167.5,180.0,0.0);
+  AliMatrix(idrotm[706],90.0,107.5,90.0,197.5,180.0,0.0);
+  AliMatrix(idrotm[707],90.0,137.5,90.0,227.5,180.0,0.0);
+  AliMatrix(idrotm[708],90.0,167.5,90.0,257.5,180.0,0.0);
+  AliMatrix(idrotm[709],90.0,197.5,90.0,287.5,180.0,0.0);
+  AliMatrix(idrotm[710],90.0,227.5,90.0,317.5,180.0,0.0);
+  AliMatrix(idrotm[711],90.0,257.5,90.0,347.5,180.0,0.0);
+  AliMatrix(idrotm[712],90.0,287.5,90.0,17.5,180.0,0.0);
+  AliMatrix(idrotm[713],90.0,317.5,90.0,47.5,180.0,0.0);
+  AliMatrix(idrotm[714],90.0,328.4,90.0,58.4,180.0,0.0);
+  AliMatrix(idrotm[715],90.0,28.4,90.0,118.4,180.0,0.0);
+  AliMatrix(idrotm[716],90.0,88.4,90.0,178.4,180.0,0.0);
+  AliMatrix(idrotm[717],90.0,148.4,90.0,238.4,180.0,0.0);
+  AliMatrix(idrotm[718],90.0,208.4,90.0,298.4,180.0,0.0);
+  AliMatrix(idrotm[719],90.0,268.4,90.0,358.4,180.0,0.0);
+  AliMatrix(idrotm[720],90.0,28.4,90.0,118.4,0.0,0.0);
+  AliMatrix(idrotm[721],90.0,88.4,90.0,178.4,0.0,0.0);
+  AliMatrix(idrotm[722],90.0,148.4,90.0,238.4,0.0,0.0);
+  AliMatrix(idrotm[723],90.0,208.4,90.0,298.4,0.0,0.0);
+  AliMatrix(idrotm[724],90.0,268.4,90.0,358.4,0.0,0.0);
+  AliMatrix(idrotm[725],90.0,328.4,90.0,58.4,0.0,0.0);
+  AliMatrix(idrotm[726],90.0,77.5,90.0,167.5,0.0,0.0);
+  AliMatrix(idrotm[727],90.0,107.5,90.0,197.5,0.0,0.0);
+  AliMatrix(idrotm[728],90.0,137.5,90.0,227.5,0.0,0.0);
+  AliMatrix(idrotm[729],90.0,167.5,90.0,257.5,0.0,0.0);
+  AliMatrix(idrotm[730],90.0,227.5,90.0,317.5,0.0,0.0);
+  AliMatrix(idrotm[731],90.0,257.5,90.0,347.5,0.0,0.0);
+  AliMatrix(idrotm[732],90.0,317.5,90.0,47.5,0.0,0.0);  
+  AliMatrix(idrotm[733],90.0,197.5,90.0,287.5,0.0,0.0);
+  AliMatrix(idrotm[734],90.0,347.5,90.0,77.5,0.0,0.0);
+  AliMatrix(idrotm[735],90.0,47.5,90.0,137.5,0.0,0.0);
+  AliMatrix(idrotm[768],90.0,287.5,90.0,17.5,0.0,0.0);
+  AliMatrix(idrotm[798],90.0,17.5,90.0,107.5,0.0,0.0);
+
+  // Services
+    
+  AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);  
 
 
   //     CONVERT INTO CM (RL(SI)=9.36 CM) 
+  
   for (i = 0; i < 6; ++i) {
     drl[i] = drl[i] / 100. * 9.36;
   }
     
   //     FIELD CAGE HALF LENGTH 
   
-  rlim  = 56.;
-  zmax  = 76.708;
-  xltpc = 284.;
-    
+  rlim  = 50.;
+  zmax  = 74.;
+  ztpc = 284.;
+  
   // --- Define ghost volume containing the whole ITS (including services) 
   //     and fill it with air 
   
   dgh[0] = 0.;
   dgh[1] = 360.;
-  dgh[2] = 12.;
-  dgh[3] = -xltpc-5.-0.1;
+  dgh[2] = 16.;
+  dgh[3] = -ztpc-5.-0.1;
   dgh[4] = 62.4;
   dgh[5] = 85.;
-  dgh[6] = -xltpc;
-  dgh[7] = 61.5;
+  dgh[6] = -ztpc;
+  dgh[7] = 62;
   dgh[8] = 85.;
-  dgh[9] = -xltpc;
-  dgh[10] = 61.5;
-  dgh[11] = 61.5+4.;
-  dgh[12] = -100.7;
-  dgh[13] = 44.9;
-  dgh[14] = 56.1;
-  dgh[15] = -77.2;
-  dgh[16] = 44.9;
-  dgh[17] = 56.1;
-  dgh[18] = -40.;
-  dgh[19] = 3.295;
-  dgh[20] = 56.1; 
-
-/*
-  dgh[21] = -35.;
-  dgh[22] = 3.295;
-  dgh[23] = 56.1;
-
-  dgh[24] = -35.;
-  dgh[25] = 5.;
-  dgh[26] = 56.1;
-
-  dgh[27] = -29.;
-  dgh[28] = 5.;
-  dgh[29] = 56.1;
-  
-  dgh[30] = -29.;
-  dgh[31] = 3.295;
-  dgh[32] = 56.1;
-
-*/
-
-
-  dgh[21] = 40.;
-  dgh[22] = 3.295;
-  dgh[23] = 56.1;
-  dgh[24] = 77.2;
-  dgh[25] = 44.9;
-  dgh[26] = 56.1;
-  dgh[27] = 100.7;
-  dgh[28] = 44.9;
-  dgh[29] = 56.1;
-  dgh[30] = xltpc;
-  dgh[31] = 61.5;
-  dgh[32] = 61.5+4.;
-  dgh[33] = xltpc;
-  dgh[34] = 61.5;
-  dgh[35] = 85.;
-  dgh[36] = xltpc+4.+0.1;
-  dgh[37] = 62.4;
-  dgh[38] = 85.;
-
-  gMC->Gsvolu("ITSV", "PCON", idtmed[275], dgh, 39);
+  dgh[9] = -ztpc;
+  dgh[10] = 62;
+  dgh[11] = 62+4.;
+  dgh[12] = -97.5;
+  dgh[13] = 46;
+  dgh[14] = rlim+6;
+  dgh[15] = -zmax;
+  dgh[16] = 46;
+  dgh[17] = rlim+6;
+  dgh[18] = -48;
+  dgh[19] = 6;
+  dgh[20] = rlim+6; 
+  dgh[21] = -28.6;
+  dgh[22] = 6;
+  dgh[23] = rlim+6;
+  dgh[24] = -27.6;
+  dgh[25] = 3.295;
+  dgh[26] = rlim+6;
+  dgh[27] = 27.6;
+  dgh[28] = 3.295;
+  dgh[29] = rlim+6;
+  dgh[30] = 28.6;
+  dgh[31] = 6;
+  dgh[32] = rlim+6;
+  dgh[33] = 48;
+  dgh[34] = 6;
+  dgh[35] = rlim+6;
+  dgh[36] = zmax;
+  dgh[37] = 46;
+  dgh[38] = rlim+6;
+  dgh[39] = 97.5;
+  dgh[40] = 46;
+  dgh[41] = rlim+6;
+  dgh[42] = ztpc;
+  dgh[43] = 62;
+  dgh[44] = 62+4.;
+  dgh[45] = ztpc;
+  dgh[46] = 62;
+  dgh[47] = 85.;
+  dgh[48] = ztpc+4.+0.1;
+  dgh[49] = 62.4;
+  dgh[50] = 85.;
+  gMC->Gsvolu("ITSV", "PCON", idtmed[205], dgh, 51);
+
+
   
   // --- Place the ghost volume in its mother volume (ALIC) and make it 
   //     invisible 
   
   gMC->Gspos("ITSV", 1, "ALIC", 0., 0., 0., 0, "ONLY");
   //gMC->Gsatt("ITSV", "SEEN", 0); 
-  
+
+
   // --- Define ghost volume containing the six layers and fill it with air 
   
   dgh[0] = 0.;
   dgh[1] = 360.;
-  dgh[2] = 4.;
-  dgh[3] = -77.2;
-  dgh[4] = 45.;
-  dgh[5] = 56.;
-  dgh[6] = -40.;     
-  dgh[7] = 3.3;
-  dgh[8] = 56.;
-  dgh[9] = 40.;
-  dgh[10] = 3.3;
-  dgh[11] = 56.;
-  dgh[12] = 77.2;
-  dgh[13] = 45.;
-  dgh[14] = 56.;
-  gMC->Gsvolu("ITSD", "PCON", idtmed[275], dgh, 15);
-  
-  // --- Place the ghost volume in its mother volume (ALIC) and make it 
+  dgh[2] = 8.;
+  dgh[3] = -zmax;  
+  dgh[4] = 46.;
+  dgh[5] = rlim;
+  dgh[6] = -47.5;    
+  dgh[7] = 6.005;
+  dgh[8] = rlim;
+  dgh[9] = -28.5;    
+  dgh[10] = 6.005;
+  dgh[11] = rlim;  
+  dgh[12] = -27.5;   
+  dgh[13] = 3.3;
+  dgh[14] = rlim;
+  dgh[15] = 27.5;    
+  dgh[16] = 3.3;
+  dgh[17] = rlim;
+  dgh[18] = 28.5;    
+  dgh[19] = 6.005;
+  dgh[20] = rlim;
+  dgh[21] = 47.5;    
+  dgh[22] = 6.005;
+  dgh[23] = rlim;
+  dgh[24] = zmax;    
+  dgh[25] = 46.;
+  dgh[26] = rlim;
+  gMC->Gsvolu("ITSD", "PCON", idtmed[205], dgh, 27);
+  
+  // --- Place the ghost volume in its mother volume (ITSV) and make it 
   //     invisible 
   
   gMC->Gspos("ITSD", 1, "ITSV", 0., 0., 0., 0, "ONLY");
   //gMC->Gsatt("ITSD", "SEEN", 0);
-  
-  // --- Define SPD (version 'a') volumes ----------------------------
-  
-  dits[0] = 3.7;
-  dits[1] = 7.75;
-  dits[2] = 24;
-  gMC->Gsvolu("IT12", "TUBE", idtmed[200], dits, 3);   
 
-  dits[0] = 3.7;
-  dits[1] = 7.7;
-  dits[2] = 24;
-  dits[3] = 57;
-  dits[4] = 100;
-  gMC->Gsvolu("I12A", "TUBS", idtmed[200], dits, 5); 
-  
-  dits[0] = 0.843;
-  dits[1] = 0.025;
-  dits[2] = 19.344;
-  gMC->Gsvolu("I10A", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.843;
-  dits[1] = 0.025;
-  dits[2] = 19.344;
-  gMC->Gsvolu("I20A", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 1.3673;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I123", "BOX ", idtmed[200], dits, 3);
-  
-  dits[0] = 0.06;
-  dits[1] = 0.08;
-  dits[2] = 24;
-  dits[3] = -36.79;
-  dits[4] = 21.834;
-  gMC->Gsvolu("I121", "TUBS", idtmed[200], dits, 5);  
-  
-  dits[0] = 0.1253;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I122", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.04;
-  dits[1] = 0.06 ;
-  dits[2] = 24;
-  dits[3] = 126.79;
-  dits[4] = 270;
-  gMC->Gsvolu("I120", "TUBS", idtmed[200], dits, 5);  
-  
-  dits[0] = 0.1134;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I144", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.25;
-  dits[1] = 0.06;
-  dits[2] = 24;
-  gMC->Gsvolu("I113", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.077;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I143", "BOX ", idtmed[200], dits, 3);   
-
-  dits[0] = 0.04;
-  dits[1] = 0.06;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 90;
-  gMC->Gsvolu("I142", "TUBS", idtmed[200], dits, 5); 
-  
-  dits[0] = 0.0695;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I141", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.06;
-  dits[1] = 0.08;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 108;
-  gMC->Gsvolu("I140", "TUBS", idtmed[200], dits, 5);  
-  
-  dits[0] = 0.1835;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I139", "BOX ", idtmed[200], dits, 3);
-  
-  dits[0] = 0.1894 ;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I138", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.04;
-  dits[1] = 0.06;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 75.261;
-  gMC->Gsvolu("I137", "TUBS", idtmed[200], dits, 5);  
-  
-  dits[0] = 1.3401;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I136", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.05;
-  dits[1] = 0.07;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 72.739;
-  gMC->Gsvolu("I135", "TUBS", idtmed[200], dits, 5);  
-  
-  dits[0] = 0.1193;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I134", "BOX ", idtmed[200], dits, 3);    
-  
-  dits[0] = 0.163;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I133", "BOX ", idtmed[200], dits, 3);   
+  // --- Define SPD (option 'a') volumes ----------------------------
+  
+  // SPD - option 'a' 
+  // (this is NOT the default)
+
+  if (option == 1) {
+  
+     dits[0] = 3.7;
+     dits[1] = 7.75;
+     dits[2] = 26.1;
+     gMC->Gsvolu("IT12", "TUBE", idtmed[254], dits, 3);   
+
+     dits[0] = 3.7;
+     dits[1] = 7.7;
+     dits[2] = 24;
+     dits[3] = 57;
+     dits[4] = 100;
+     gMC->Gsvolu("I12A", "TUBS", idtmed[254], dits, 5);    // sector
+
+     di10a[0] = 0.843;
+     di10a[1] = ddet1+dchip1+dbus+0.0025;
+     di10a[2] = 19.344;
+     gMC->Gsvolu("I10A", "BOX ", idtmed[254], di10a, 3);    // mother volume
+                                                            // on layer 1
+     di20a[0] = 0.843;
+     di20a[1] = ddet2+dchip2+dbus+0.0025;
+     di20a[2] = 19.344;
+     gMC->Gsvolu("I20A", "BOX ", idtmed[254], di20a, 3);    // mother volume
+                                                            // on layer 2
+     dits[0] = 1.3673;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I123", "BOX ", idtmed[253], dits, 3);
+
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = -36.79;
+     dits[4] = 21.834;
+     gMC->Gsvolu("I121", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.1253;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I122", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.04;
+     dits[1] = 0.06 ;
+     dits[2] = 24;
+     dits[3] = 126.79;
+     dits[4] = 270;
+     gMC->Gsvolu("I120", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.1134;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I144", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.25;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     gMC->Gsvolu("I113", "BOX ", idtmed[254], dits, 3);  
+
+     dits[0] = 0.077;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I143", "BOX ", idtmed[253], dits, 3);   
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 90;
+     gMC->Gsvolu("I142", "TUBS", idtmed[253], dits, 5); 
+
+     dits[0] = 0.0695;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I141", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 108;
+     gMC->Gsvolu("I140", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.1835;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I139", "BOX ", idtmed[253], dits, 3);
+
+     dits[0] = 0.1894 ;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I138", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 75.261;
+     gMC->Gsvolu("I137", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 1.3401;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I136", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.05;
+     dits[1] = 0.07;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 72.739;
+     gMC->Gsvolu("I135", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.1193;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I134", "BOX ", idtmed[253], dits, 3);    
+
+     dits[0] = 0.163;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I133", "BOX ", idtmed[253], dits, 3);   
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 157.633;
+     gMC->Gsvolu("I132", "TUBS", idtmed[253], dits, 5); 
+
+     dits[0] = 0.2497;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I131", "BOX ", idtmed[253], dits, 3); 
+
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 148.633;
+     gMC->Gsvolu("I130", "TUBS", idtmed[253], dits, 5); 
+
+     dits[0] = 0.292;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I129", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.163;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I128", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 161.297;
+     gMC->Gsvolu("I126", "TUBS", idtmed[253], dits, 5);
+
+     dits[0] = 0.2433;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I125", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 42.883;
+     gMC->Gsvolu("I124", "TUBS", idtmed[253], dits, 5);  
+
+     di103[0] = 0.793;
+     di103[1] = ddet1+dchip1;
+     di103[2] = 3.536;
+     gMC->Gsvolu("I103", "BOX ", idtmed[254], di103, 3); // contains det and chip  
+                                                         // layer 1
+     dits[0] = 0.793;
+     dits[1] = 0.475;  //0.685; 0.015
+     dits[2] = 2.5;
+     gMC->Gsvolu("I105", "BOX ", idtmed[290], dits, 3);  
+
+     di104[0] = 0.843;
+     di104[1] = dbus;
+     di104[2] = 14.344;
+     gMC->Gsvolu("I104", "BOX ", idtmed[275], di104, 3);  // bus for both layers
+
+     di1d3[0] = 0.793;
+     di1d3[1] = ddet2+dchip2;
+     di1d3[2] = 3.536;
+     gMC->Gsvolu("I1D3", "BOX ", idtmed[254], di1d3, 3); // contains det and chip
+                                                         // layer 2
+     dits[0] = 0.793;
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 80;
+     gMC->Gsvolu("I112", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 80;
+     gMC->Gsvolu("I111", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.15;
+     dits[1] = 0.0146;
+     dits[2] = 24;
+     gMC->Gsvolu("I118", "BOX ", idtmed[273], dits, 3);  
+
+     dits[0] = 0.1315;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I110", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.025;
+     dits[1] = 0.035;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 180;
+     gMC->Gsvolu("I114", "TUBS", idtmed[264], dits, 5);  
+
+     if (fluid == 1) {
+        dits[0] = 0;
+        dits[1] = 0.025;
+        dits[2] = 24;
+        dits[3] = 0;
+        dits[4] = 180;
+        gMC->Gsvolu("I115", "TUBS", idtmed[211], dits, 5); // set water as cooling fluid   
+     } else {
+        dits[0] = 0;
+        dits[1] = 0.025;
+        dits[2] = 24;
+        dits[3] = 0;
+        dits[4] = 180;
+        gMC->Gsvolu("I115", "TUBS", idtmed[212], dits, 5); // set freon as cooling fluid       
+     }
+     
+     dits[0] = 0.063;
+     dits[1] = 0.035;
+     dits[2] = 24;
+     gMC->Gsvolu("I116", "BOX ", idtmed[264], dits, 3); 
+
+     di102[0] = 0.793;
+     di102[1] = dchip1;
+     di102[2] = 0.68;
+     gMC->Gsvolu("I102", "BOX ", idtmed[201], di102, 3);   // chip layer 1
+         
+     di1d2[0] = 0.793;
+     di1d2[1] = dchip2;
+     di1d2[2] = 0.68;
+     gMC->Gsvolu("I1D2", "BOX ", idtmed[201], di1d2, 3);   // chip     layer 2
+
+     di101[0] = 0.705;
+     di101[1] = ddet1;
+     di101[2] = 3.536;
+     gMC->Gsvolu("I101", "BOX ", idtmed[250], di101, 3);   // contains detector 
+                                                           // layer 1
+     di1d1[0] = 0.705;
+     di1d1[1] = ddet2;
+     di1d1[2] = 3.536;
+     gMC->Gsvolu("I1D1", "BOX ", idtmed[250], di1d1, 3);   // contains detector 
+                                                           // layer 2
+     if (fluid == 1) {
+        dits[0] = 0.063;
+        dits[1] = 0.025;
+        dits[2] = 24;
+        gMC->Gsvolu("I117", "BOX ", idtmed[211], dits, 3); // set water as cooling fuid
+     } else {
+        dits[0] = 0.063;
+        dits[1] = 0.025;
+        dits[2] = 24;
+        gMC->Gsvolu("I117", "BOX ", idtmed[212], dits, 3); // set freon as cooling fluid
+     }
+
+     dits1[0] = 0.64;
+     dits1[1] = ddet1;
+     dits1[2] = 3.48;
+     gMC->Gsvolu("ITS1", "BOX ", idtmed[200], dits1, 3);   // detector layer 1
+
+     dits2[0] = 0.64;
+     dits2[1] = ddet2;
+     dits2[2] = 3.48;
+     gMC->Gsvolu("ITS2", "BOX ", idtmed[200], dits2, 3);   // detector layer 2
+
+     dits[0] = 3.701;
+     dits[1] = 7.699;
+     dits[2] = 4;
+     dits[3] = 57.1;
+     dits[4] = 99.9;  
+     gMC->Gsvolu("I650", "TUBS", idtmed[254], dits, 5);  // was I150 in old geom.
+
+     dits[0] = 0;
+     dits[1] = 0.5;
+     dits[2] = 1.5;
+     gMC->Gsvolu("I676", "TUBE", idtmed[274], dits, 3); // was I176 in old geom.
+
+     dits[0] = 0;
+     dits[1] = 0.18;
+     dits[2] = 0.8;
+     gMC->Gsvolu("I673", "TUBE", idtmed[274], dits, 3); // was I173 in old geom.
+
+     dits[0] = 0;
+     dits[1] = 0.18;
+     dits[2] = 3;
+     gMC->Gsvolu("I671", "TUBE", idtmed[274], dits, 3); // was I171 in old geom.
+
+     dits[0] = 0;
+     dits[1] = 0.075;
+     dits[2] = 0.8;
+     gMC->Gsvolu("I669", "TUBE", idtmed[264], dits, 3); // was I169 in old geom.
+
+     dits[0] = 3.5;
+     dits[1] = 5.6;
+     dits[2] = 0.55;
+     dits[3] = 0;
+     dits[4] = 38;
+     gMC->Gsvolu("I667", "TUBS", idtmed[263], dits, 5); // was I167 in old geom.
+
+     dits[0] = 6.6;
+     dits[1] = 7.6;
+     dits[2] = 0.5;
+     dits[3] = 0;
+     dits[4] = 9;
+     gMC->Gsvolu("I666", "TUBS", idtmed[263], dits, 5); // was I166 in old geom.
+
+     dits[0] = 0.26;
+     dits[1] = 0.32;
+     dits[2] = 0.55;
+     gMC->Gsvolu("I678", "TUBE", idtmed[263], dits, 3); // was I178 in old geom.
+
+     if (fluid == 1) {
+        dits[0] = 0;
+        dits[1] = 0.3;
+        dits[2] = 1.5;
+        gMC->Gsvolu("I677", "TUBE", idtmed[211], dits, 3); // set water as cooling fluid
+                                                          // was I177 in old geom.
+     } else {
+         dits[0] = 0;
+        dits[1] = 0.3;
+        dits[2] = 1.5;
+        gMC->Gsvolu("I677", "TUBE", idtmed[212], dits, 3); // set freon as cooling fluid
+                                                          // was I177 in old geom.    
+     }
+     
+     dits[0] = 0.07;
+     dits[1] = 0.125;
+     dits[2] = 0.3;
+     gMC->Gsvolu("I675", "TUBE", idtmed[263], dits, 3); // was I175 in old geom.
+
+     if (fluid == 1) {
+        dits[0] = 0;
+        dits[1] = 0.1;
+        dits[2] = 0.8;
+        gMC->Gsvolu("I674", "TUBE", idtmed[211], dits, 3); // set water as cooling fluid
+                                                          // was I174 in old geom.
+     } else {
+        dits[0] = 0;
+        dits[1] = 0.1;
+        dits[2] = 0.8;
+        gMC->Gsvolu("I674", "TUBE", idtmed[212], dits, 3); // set freon as cooling fluid
+                                                          // was I174 in old geom.     
+     }
+     
+     if (fluid == 1) {
+        dits[0] = 0;
+        dits[1] = 0.1;
+        dits[2] = 3;
+        gMC->Gsvolu("I672", "TUBE", idtmed[211], dits, 3); // set water as cooling fluid
+                                                          // was I172 in old geom.
+     } else {
+        dits[0] = 0;
+        dits[1] = 0.1;
+        dits[2] = 3;
+        gMC->Gsvolu("I672", "TUBE", idtmed[212], dits, 3); // set freon as cooling fluid
+                                                          // was I172 in old geom.        
+     }
+     
+     if (fluid == 1) {     
+        dits[0] = 0;
+        dits[1] = 0.0746;
+        dits[2] = 0.8;
+        gMC->Gsvolu("I670", "TUBE", idtmed[211], dits, 3); // set water as cooling fluid
+                                                          // was I170 in old geom.
+     } else {
+        dits[0] = 0;
+        dits[1] = 0.0746;
+        dits[2] = 0.8;
+        gMC->Gsvolu("I670", "TUBE", idtmed[212], dits, 3); // set freon as cooling fluid
+                                                          // was I170 in old geom.     
+     }
+     
+     if (fluid == 1) {     
+        dits[0] = 3.7;
+        dits[1] = 5.4;
+        dits[2] = 0.35;
+        dits[3] = 2;
+        dits[4] = 36;
+        gMC->Gsvolu("I668", "TUBS", idtmed[211], dits, 5); // set water as cooling fluid
+                                                          // was I168 in old geom.
+     } else {
+        dits[0] = 3.7;
+        dits[1] = 5.4;
+        dits[2] = 0.35;
+        dits[3] = 2;
+        dits[4] = 36;
+        gMC->Gsvolu("I668", "TUBS", idtmed[212], dits, 5); // set freon as cooling fluid
+                                                          // was I168 in old geom.
+     }
 
-  dits[0] = 0.04;
-  dits[1] = 0.06;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 157.633;
-  gMC->Gsvolu("I132", "TUBS", idtmed[200], dits, 5); 
-  
-  dits[0] = 0.2497;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I131", "BOX ", idtmed[200], dits, 3); 
-  
-  dits[0] = 0.06;
-  dits[1] = 0.08;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 148.633;
-  gMC->Gsvolu("I130", "TUBS", idtmed[200], dits, 5); 
 
-  dits[0] = 0.292;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I129", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.163;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I128", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.04;
-  dits[1] = 0.06;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 161.297;
-  gMC->Gsvolu("I126", "TUBS", idtmed[200], dits, 5);
-  
-  dits[0] = 0.2433;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I125", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.06;
-  dits[1] = 0.08;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 42.883;
-  gMC->Gsvolu("I124", "TUBS", idtmed[200], dits, 5);  
-  
-  dits[0] = 0.793;
-  dits[1] = 0.0125;
-  dits[2] = 3.536;
-  gMC->Gsvolu("I103", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.793;
-  dits[1] = 0.015 ;
-  dits[2] = 2.5;
-  gMC->Gsvolu("I105", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.843;
-  dits[1] = 0.01;
-  dits[2] = 19.344;
-  gMC->Gsvolu("I104", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.793;
-  dits[1] = 0.0125;
-  dits[2] = 3.536;
-  gMC->Gsvolu("I1D3", "BOX ", idtmed[200], dits, 3);
-  
-  dits[0] = 0.06;
-  dits[1] = 0.08;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 80;
-  gMC->Gsvolu("I112", "TUBS", idtmed[200], dits, 5);  
-  
-  dits[0] = 0.04;
-  dits[1] = 0.06;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 80;
-  gMC->Gsvolu("I111", "TUBS", idtmed[200], dits, 5);  
-  
-  dits[0] = 0.15;
-  dits[1] = 0.0146;
-  dits[2] = 24;
-  gMC->Gsvolu("I118", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.1315;
-  dits[1] = 0.01;
-  dits[2] = 24;
-  gMC->Gsvolu("I110", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.025;
-  dits[1] = 0.035;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 180;
-  gMC->Gsvolu("I114", "TUBS", idtmed[200], dits, 5);  
-  
-  dits[0] = 0;
-  dits[1] = 0.025;
-  dits[2] = 24;
-  dits[3] = 0;
-  dits[4] = 180;
-  gMC->Gsvolu("I115", "TUBS", idtmed[200], dits, 5);   
+  }
 
-  dits[0] = 0.063;
-  dits[1] = 0.035;
-  dits[2] = 24;
-  gMC->Gsvolu("I116", "BOX ", idtmed[200], dits, 3); 
-  
-  dits[0] = 0.705;
-  dits[1] = 0.005;
-  dits[2] = 3.536;
-  gMC->Gsvolu("I101", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.793;
-  dits[1] = 0.0075;
-  dits[2] = 0.68;
-  gMC->Gsvolu("I102", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.705;
-  dits[1] = 0.005;
-  dits[2] = 3.536;
-  gMC->Gsvolu("I1D1", "BOX ", idtmed[200], dits, 3);
-  
-  dits[0] = 0.063;
-  dits[1] = 0.025;
-  dits[2] = 24;
-  gMC->Gsvolu("I117", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.64;
-  dits[1] = 0.005;
-  dits[2] = 3.48;
-  gMC->Gsvolu("ITS1", "BOX ", idtmed[200], dits, 3);  
-  
-  dits[0] = 0.64;
-  dits[1] = 0.005;
-  dits[2] = 3.48;
-  gMC->Gsvolu("ITS2", "BOX ", idtmed[200], dits, 3);  
+  // --- Define SPD (option 'b') volumes ----------------------------
+  
+  // SPD - option 'b' 
+  // (this is the default)
+
+  if (option == 2) {
+  
+     dits[0] = 3.7;
+     dits[1] = 7.75;
+     dits[2] = 26.1;
+     gMC->Gsvolu("IT12", "TUBE", idtmed[254], dits, 3);   
+
+     dits[0] = 3.7;
+     dits[1] = 7.7;
+     dits[2] = 24;
+     dits[3] = 57;
+     dits[4] = 100;
+     gMC->Gsvolu("I12B", "TUBS", idtmed[254], dits, 5);   // sector
+
+     di10b[0] = 0.843;
+     di10b[1] = ddet1+dchip1+dbus+0.0025;  
+     di10b[2] = 19.344;
+     gMC->Gsvolu("I10B", "BOX ", idtmed[254], di10b, 3);   // mother volume 
+                                                               // on layer 1
+
+     di20b[0] = 0.843;
+     di20b[1] = ddet2+dchip2+dbus+0.0025;   
+     di20b[2] = 19.344;
+     gMC->Gsvolu("I20B", "BOX ", idtmed[254], di20b, 3);   // mother volume
+                                                               // layer 2
+
+     dits[0] = 1.3673;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I123", "BOX ", idtmed[253], dits, 3);
+
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = -36.79;
+     dits[4] = 21.834;
+     gMC->Gsvolu("I121", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.1253;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I122", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.04;
+     dits[1] = 0.06 ;
+     dits[2] = 24;
+     dits[3] = 126.79;
+     dits[4] = 270;
+     gMC->Gsvolu("I120", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.1134;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I144", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.25;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     gMC->Gsvolu("I113", "BOX ", idtmed[254], dits, 3);  
+
+     dits[0] = 0.077;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I143", "BOX ", idtmed[253], dits, 3);   
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 90;
+     gMC->Gsvolu("I142", "TUBS", idtmed[253], dits, 5); 
+
+     dits[0] = 0.0695;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I141", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 108;
+     gMC->Gsvolu("I140", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.1835;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I139", "BOX ", idtmed[253], dits, 3);
+
+     dits[0] = 0.1894 ;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I138", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 75.261;
+     gMC->Gsvolu("I137", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 1.3401;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I136", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.05;
+     dits[1] = 0.07;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 72.739;
+     gMC->Gsvolu("I135", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.1193;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I134", "BOX ", idtmed[253], dits, 3);    
+
+     dits[0] = 0.163;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I133", "BOX ", idtmed[253], dits, 3);   
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 157.633;
+     gMC->Gsvolu("I132", "TUBS", idtmed[253], dits, 5); 
+
+     dits[0] = 0.2497;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I131", "BOX ", idtmed[253], dits, 3); 
+
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 148.633;
+     gMC->Gsvolu("I130", "TUBS", idtmed[253], dits, 5); 
+
+     dits[0] = 0.292;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I129", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.163;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I128", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 161.297;
+     gMC->Gsvolu("I126", "TUBS", idtmed[253], dits, 5);
+
+     dits[0] = 0.2433;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I125", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 42.883;
+     gMC->Gsvolu("I124", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.793;
+     dits[1] = 0.475;  //0.685; 0.015
+     dits[2] = 2.5;
+     gMC->Gsvolu("I105", "BOX ", idtmed[290], dits, 3);  
+
+     di107[0] = 0.793;
+     di107[1] = ddet1+dchip1;
+     di107[2] = 3.536;
+     gMC->Gsvolu("I107", "BOX ", idtmed[254], di107, 3); // contains det and chip   
+                                                         // layer 1
+     dits[0] = 0.705;
+     dits[1] = 0.01;
+     dits[2] = 2.5;
+     gMC->Gsvolu("I109", "BOX ", idtmed[275], dits, 3);  
+
+     di108[0] = 0.705;
+     di108[1] = dbus;
+     di108[2] = 14.344;
+     gMC->Gsvolu("I108", "BOX ", idtmed[275], di108, 3); // bus for both layers 
+
+     di1d7[0] = 0.7975;
+     di1d7[1] = ddet2+dchip2;   
+     di1d7[2] = 3.536;
+     gMC->Gsvolu("I1D7", "BOX ", idtmed[254], di1d7, 3); // contains det and chip
+                                                         // layer 2
+     dits[0] = 0.06;
+     dits[1] = 0.08;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 80;
+     gMC->Gsvolu("I112", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.04;
+     dits[1] = 0.06;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 80;
+     gMC->Gsvolu("I111", "TUBS", idtmed[253], dits, 5);  
+
+     dits[0] = 0.15;
+     dits[1] = 0.0146;
+     dits[2] = 24;
+     gMC->Gsvolu("I118", "BOX ", idtmed[273], dits, 3);  
+
+     dits[0] = 0.1315;
+     dits[1] = 0.01;
+     dits[2] = 24;
+     gMC->Gsvolu("I110", "BOX ", idtmed[253], dits, 3);  
+
+     dits[0] = 0.025;
+     dits[1] = 0.035;
+     dits[2] = 24;
+     dits[3] = 0;
+     dits[4] = 180;
+     gMC->Gsvolu("I114", "TUBS", idtmed[264], dits, 5);  
+
+     if (fluid == 1) {
+        dits[0] = 0;
+        dits[1] = 0.025;
+        dits[2] = 24;
+        dits[3] = 0;
+        dits[4] = 180;
+        gMC->Gsvolu("I115", "TUBS", idtmed[211], dits, 5);  // set water as cooling fluid   
+     } else {
+        dits[0] = 0;
+        dits[1] = 0.025;
+        dits[2] = 24;
+        dits[3] = 0;
+        dits[4] = 180;
+        gMC->Gsvolu("I115", "TUBS", idtmed[212], dits, 5);  // set freon as cooling fluid
+     }
+     
+     dits[0] = 0.063;
+     dits[1] = 0.035;
+     dits[2] = 24;
+     gMC->Gsvolu("I116", "BOX ", idtmed[264], dits, 3); 
+
+     di106[0] = 0.7975;
+     di106[1] = dchip1;   
+     di106[2] = 0.68;
+     gMC->Gsvolu("I106", "BOX ", idtmed[201], di106, 3);   // chip layer 1
+
+     di1d6[0] = 0.7975;
+     di1d6[1] = dchip2;   
+     di1d6[2] = 0.68;
+     gMC->Gsvolu("I1D6", "BOX ", idtmed[201], di1d6, 3);   // chip layer 2
+
+     di101[0] = 0.705;
+     di101[1] = ddet1;
+     di101[2] = 3.536;
+     gMC->Gsvolu("I101", "BOX ", idtmed[250], di101, 3);  // contains detector  
+                                                          // layer 1
+     di1d1[0] = 0.705;
+     di1d1[1] = ddet2;   
+     di1d1[2] = 3.536;
+     gMC->Gsvolu("I1D1", "BOX ", idtmed[250], di1d1, 3);  // contains detector  
+                                                          // layer 2
+   
+     if (fluid == 1) {
+        dits[0] = 0.063;
+        dits[1] = 0.025;
+        dits[2] = 24;
+        gMC->Gsvolu("I117", "BOX ", idtmed[211], dits, 3); // set water as cooling fluid
+     } else {
+        dits[0] = 0.063;
+        dits[1] = 0.025;
+        dits[2] = 24;
+        gMC->Gsvolu("I117", "BOX ", idtmed[212], dits, 3); // set freon as cooling fluid
+     }
+
+     dits1[0] = 0.64;
+     dits1[1] = ddet1;
+     dits1[2] = 3.48;
+     gMC->Gsvolu("ITS1", "BOX ", idtmed[200], dits1, 3);   // detector layer 1
+
+     dits2[0] = 0.64;
+     dits2[1] = ddet2;  
+     dits2[2] = 3.48;
+     gMC->Gsvolu("ITS2", "BOX ", idtmed[200], dits2, 3);   // detector layer 2
+
+     dits[0] = 3.701;
+     dits[1] = 7.699;
+     dits[2] = 4;
+     dits[3] = 57.1;
+     dits[4] = 99.9;  
+     gMC->Gsvolu("I650", "TUBS", idtmed[254], dits, 5);  // was I150 in old geom.
+
+     dits[0] = 0;
+     dits[1] = 0.5;
+     dits[2] = 1.5;
+     gMC->Gsvolu("I676", "TUBE", idtmed[274], dits, 3); // was I176 in old geom.
+
+     dits[0] = 0;
+     dits[1] = 0.18;
+     dits[2] = 0.8;
+     gMC->Gsvolu("I673", "TUBE", idtmed[274], dits, 3); // was I173 in old geom.
+
+     dits[0] = 0;
+     dits[1] = 0.18;
+     dits[2] = 3;
+     gMC->Gsvolu("I671", "TUBE", idtmed[274], dits, 3); // was I171 in old geom.
+
+     dits[0] = 0;
+     dits[1] = 0.075;
+     dits[2] = 0.8;
+     gMC->Gsvolu("I669", "TUBE", idtmed[264], dits, 3); // was I169 in old geom.
+
+     dits[0] = 3.5;
+     dits[1] = 5.6;
+     dits[2] = 0.55;
+     dits[3] = 0;
+     dits[4] = 38;
+     gMC->Gsvolu("I667", "TUBS", idtmed[263], dits, 5); // was I167 in old geom.
+
+     dits[0] = 6.6;
+     dits[1] = 7.6;
+     dits[2] = 0.5;
+     dits[3] = 0;
+     dits[4] = 9;
+     gMC->Gsvolu("I666", "TUBS", idtmed[263], dits, 5); // was I166 in old geom.
+
+     dits[0] = 0.26;
+     dits[1] = 0.32;
+     dits[2] = 0.55;
+     gMC->Gsvolu("I678", "TUBE", idtmed[263], dits, 3); // was I178 in old geom.
+
+     if (fluid == 1) {
+        dits[0] = 0;
+        dits[1] = 0.3;
+        dits[2] = 1.5;
+        gMC->Gsvolu("I677", "TUBE", idtmed[211], dits, 3); //set water as cooling fluid
+                                                          // was I177 in old geom.
+     } else {
+        dits[0] = 0;
+        dits[1] = 0.3;
+        dits[2] = 1.5;
+        gMC->Gsvolu("I677", "TUBE", idtmed[212], dits, 3); //set freon as cooling fluid
+                                                          // was I177 in old geom.     
+     }
+
+     dits[0] = 0.07;
+     dits[1] = 0.125;
+     dits[2] = 0.3;
+     gMC->Gsvolu("I675", "TUBE", idtmed[263], dits, 3); // was I175 in old geom.
+
+     if (fluid == 1) {
+        dits[0] = 0;
+        dits[1] = 0.1;
+        dits[2] = 0.8;
+        gMC->Gsvolu("I674", "TUBE", idtmed[211], dits, 3); //set water as cooling fluid
+                                                          // was I174 in old geom.
+     } else {
+        dits[0] = 0;
+        dits[1] = 0.1;
+        dits[2] = 0.8;
+        gMC->Gsvolu("I674", "TUBE", idtmed[212], dits, 3); //set freon as cooling fluid
+                                                          // was I174 in old geom.     
+     }
+     
+     if (fluid == 1) {
+        dits[0] = 0;
+        dits[1] = 0.1;
+        dits[2] = 3;
+        gMC->Gsvolu("I672", "TUBE", idtmed[211], dits, 3); //set water as cooling fluid
+                                                          // was I172 in old geom.
+     } else {
+        dits[0] = 0;
+        dits[1] = 0.1;
+        dits[2] = 3;
+        gMC->Gsvolu("I672", "TUBE", idtmed[212], dits, 3); //set freon as cooling fluid
+                                                          // was I172 in old geom.     
+     }
+     
+     if (fluid == 1) {
+        dits[0] = 0;
+        dits[1] = 0.0746;
+        dits[2] = 0.8;
+        gMC->Gsvolu("I670", "TUBE", idtmed[211], dits, 3); //set water as cooling fluid
+                                                          // was I170 in old geom.
+     } else {
+        dits[0] = 0;
+        dits[1] = 0.0746;
+        dits[2] = 0.8;
+        gMC->Gsvolu("I670", "TUBE", idtmed[212], dits, 3); //set freon as cooling fluid
+                                                          // was I170 in old geom.     
+     }
+     
+     if (fluid == 1) {
+        dits[0] = 3.7;
+        dits[1] = 5.4;
+        dits[2] = 0.35;
+        dits[3] = 2;
+        dits[4] = 36;
+        gMC->Gsvolu("I668", "TUBS", idtmed[211], dits, 5); //set water as cooling fluid
+                                                          // was I168 in old geom.
+     } else {
+        dits[0] = 3.7;
+        dits[1] = 5.4;
+        dits[2] = 0.35;
+        dits[3] = 2;
+        dits[4] = 36;
+        gMC->Gsvolu("I668", "TUBS", idtmed[212], dits, 5); //set freon as cooling fluid
+                                                          // was I168 in old geom.     
+     }
+     
 
+  }
 
   // --- Define SDD volumes ------------------------------------------
 
+  
+  cos30 = cos(30.*3.14159/180.);
+  sin30 = sin(30.*3.14159/180.);
+
+  
   dits[0] = 0;
   dits[1] = 360;
   dits[2] = 6;
-  dits[3] = -34.6;
-  dits[4] = 23.495;
-  dits[5] = 28.5;
-  dits[6] = -23.7;
-  dits[7] = 23.495;
-  dits[8] = 28.5;
-  dits[9] = -23.7;
-  dits[10] = 14.595; 
-  dits[11] = 28.5;
-  dits[12] = 23.7;
-  dits[13] = 14.595;
-  dits[14] = 28.5;
-  dits[15] = 23.7;
-  dits[16] = 23.495;
-  dits[17] = 28.5;
-  dits[18] = 34.65;
-  dits[19] = 23.495;
-  dits[20] = 28.5;
-  gMC->Gsvolu("IT34", "PCON", idtmed[200], dits, 21);  
-
-  dits[0] = 3.2;
-  dits[1] = 2;
-  dits[2] = 34.65;
-  gMC->Gsvolu("I048", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 3.63;
-  dits[1] = 0.135;
-  dits[2] = 30.385;
-  gMC->Gsvolu("I005", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 3.2;
-  dits[1] = 2;
-  dits[2] = 23.7;
-  gMC->Gsvolu("I047", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 3.63;
-  dits[1] = 0.135;
-  dits[2] = 23.05;
-  gMC->Gsvolu("I004", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 3.2;
-  dits[1] = 2;
-  dits[2] = 2.725;
-  gMC->Gsvolu("I024", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 3.2;
-  dits[1] = 2;
-  dits[2] = 3.65;
-  gMC->Gsvolu("I018", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 3.625;
-  dits[1] = 0.015;
-  dits[2] = 4.382;
-  gMC->Gsvolu("I302", "BOX ", idtmed[200], dits, 3);  
+  dits[3] = -34.6; 
+  dits[4] = 23.49;
+  dits[5] = 28;
+  dits[6] = -23.65; 
+  dits[7] = 23.49;
+  dits[8] = 28;
+  dits[9] = -23.65;  
+  dits[10] = 14.59; 
+  dits[11] = 28;
+  dits[12] = 23.65;   
+  dits[13] = 14.59;
+  dits[14] = 28;
+  dits[15] = 23.65;    
+  dits[16] = 23.49;
+  dits[17] = 28;
+  dits[18] = 34.6;  
+  dits[19] = 23.49;
+  dits[20] = 28;
+  gMC->Gsvolu("IT34", "PCON", idtmed[209], dits, 21);  
+
+  // block of the SDD electronics and related ladder frame 
+  I018dits[0] = 3.2;
+  I018dits[1] = 2;
+  I018dits[2] = 3.65;
+  gMC->Gsvolu("I018", "BOX ", idtmed[209], I018dits, 3);  
+
+  // block of the SDD end ladder 
+  I024dits[0] = 3.2;
+  I024dits[1] = 2;
+  I024dits[2] = 2.725;
+  gMC->Gsvolu("I024", "BOX ", idtmed[209], I024dits, 3);  
+
+  // ladder frame of layer 3 - F.T. March,7-2001
+  I047dits[0] = I018dits[0];
+  I047dits[1] = I018dits[1];
+  I047dits[2] = 6*I018dits[2] + 2*I024dits[2]; 
+  gMC->Gsvolu("I047", "BOX ", idtmed[209], I047dits, 3);  
+
+  // ladder frame of layer 4 - F.T. March,7-2001
+  I048dits[0] = I018dits[0];
+  I048dits[1] = I018dits[1];
+  I048dits[2] = 8*I018dits[2] + 2*I024dits[2]; 
+  gMC->Gsvolu("I048", "BOX ", idtmed[209], I048dits, 3);  
+
+
+  // global SDD volume (sensitive + insensitive) 
+  I302dits[0] = 3.6250;
+  I302dits[1] = 0.0150;
+  I302dits[2] = 4.3794;
+  gMC->Gsvolu("I302", "BOX ", idtmed[278], I302dits, 3);
+
+  // Like for I302 - F.T. March,7-2001
+  I402dits[0] = 3.6250;
+  I402dits[1] = 0.0150;
+  I402dits[2] = 4.3794;
+  gMC->Gsvolu("I402", "BOX ", idtmed[278], I402dits, 3);  
+
+  // SDD ladder of layer 3 - F.T. March,7-2001
+  I004dits[0] = I302dits[0]+0.005;
+  I004dits[1] = 2*I302dits[1]+Y_SDD_sep/2.;
+  I004dits[2] = TMath::Abs(Z_SDD_lay3[0]);
+  if (I004dits[2] < TMath::Abs(Z_SDD_lay3[5])) {
+    I004dits[2] = TMath::Abs(Z_SDD_lay3[5]);
+  }
+  I004dits[2] = I004dits[2] + I302dits[2];
+  gMC->Gsvolu("I004", "BOX ", idtmed[209], I004dits, 3);  
+
+  // SDD ladder of layer 4 - F.T. March,7-2001
+  I005dits[0] = I402dits[0]+0.005;
+  I005dits[1] = 2*I402dits[1]+Y_SDD_sep/2.;
+  I005dits[2] = TMath::Abs(Z_SDD_lay4[0]);
+  if (I005dits[2] < TMath::Abs(Z_SDD_lay4[7])) {
+    I005dits[2] = TMath::Abs(Z_SDD_lay4[7]);
+  }
+  I005dits[2] = I005dits[2] + I402dits[2];
+  gMC->Gsvolu("I005", "BOX ", idtmed[209], I005dits, 3);  
+
+
+  // -- block of the SDD ladder foot and end ladder
+
+  // ladder foot mother volume
+  I028dits[0] = 3.0000;
+  I028dits[1] = 0.4000;
+  I028dits[2] = 0.9000;
+  gMC->Gsvolu("I028", "BOX ", idtmed[224], I028dits, 3);  
+
+  // positioning-box #1 at SDD end-ladder - F.T. March,7-2001
+  I420dits[0] = 0.4500;
+  I420dits[1] = 0.4000;
+  I420dits[2] = 0.4500;
+  gMC->Gsvolu("I420", "BOX ", idtmed[264], I420dits, 3);  
+
+  // positioning-box #2 at SDD end-ladder - F.T. March,7-2001
+  I421dits[0] = 0.;
+  I421dits[1] = 0.25;
+  I421dits[2] = I420dits[1];
+  gMC->Gsvolu("I421", "TUBE", idtmed[209], I421dits, 3);  
+
+  // reference ruby-sphere at SDD end-ladder - F.T. March,7-2001 
+  I422dits[0] = 0.0000;
+  I422dits[1] = 0.2000;
+  I422dits[2] = 0.0000;
+  I422dits[3] = 180.00;
+  I422dits[4] = 0.0000;
+  I422dits[5] = 360.00;
+  gMC->Gsvolu("I422", "SPHE", idtmed[277], I422dits, 6);  
+
+  // support for ruby-sphere (I422) - F.T. March,7-2001
+  I423dits[0] = 0.0000;
+  I423dits[1] = 0.1000;
+  I423dits[2] = (I420dits[1]-I422dits[1])/2.;
+  gMC->Gsvolu("I423", "TUBE", idtmed[264], I423dits, 3);  
+
+  // passage for HV microcables - F.T. March,7-2001
+  I424dits[0] = 1.5000;
+  I424dits[1] = 0.1500;
+  I424dits[2] = I421dits[2];
+  gMC->Gsvolu("I424", "BOX ", idtmed[209], I424dits, 3);  
+
+  // HV microcables segment at the end ladder - F.T. March,7-2001
+  I425dits[0] = 1.350000;
+  I425dits[1] = 0.015250;
+  I425dits[2] = I024dits[2];
+  gMC->Gsvolu("I425", "BOX ", idtmed[279], I425dits, 3);  
+
+  // lower edge of SDD ladder frame at end-ladder - part 1
+  dits[0] = 0.2;
+  dits[1] = 0.1815;
+  dits[2] = I024dits[2];
+  dits[3] = 0.015;
+  gMC->Gsvolu("I025", "TRD1", idtmed[208], dits, 4);  
 
-  dits[0] = 3.625;
-  dits[1] = 0.015;
-  dits[2] = 4.382;
-  gMC->Gsvolu("I402", "BOX ", idtmed[200], dits, 3);  
+  // lower edge of SDD ladder frame at end-ladder - part 2
+  dits[0] = 0.183;
+  dits[1] = 0.165;
+  dits[2] = I024dits[2];
+  dits[3] = 0.015;
+  gMC->Gsvolu("I026", "TRD1", idtmed[208], dits, 4);  
+
+  // new: for the 1st top rod of the structure 
+  // at the end-ladder - F.T. March,7-2001
+  I029dits[0] = 0.2;
+  I029dits[1] = 0.1815;
+  I029dits[2] = 1.0100;
+  I029dits[3] = 0.015;
+  gMC->Gsvolu("I029", "TRD1", idtmed[208], I029dits, 4);  
+
+  // new: for the 2nd top rod of the structure 
+  // at the end-ladder - F.T. March,7-2001
+  I030dits[0] = 0.1830;
+  I030dits[1] = 0.1650;
+  I030dits[2] = 1.0100;
+  I030dits[3] = 0.0150;
+  gMC->Gsvolu("I030", "TRD1", idtmed[208], I030dits, 4);  
+
+  // inox cooling tubes for the end ladder - F.T. March,7-2001
+  I031dits[0] = 0.093;
+  I031dits[1] = 0.1;
+  I031dits[2] = I024dits[2];
+  gMC->Gsvolu("I031", "TUBE", idtmed[264], I031dits, 3);  
+
+  if (fluid == 1) {
+     // cooling water for the end ladder - F.T. March,7-2001
+     I032dits[0] = 0;
+     I032dits[1] = I031dits[0];
+     I032dits[2] = I024dits[2];
+     gMC->Gsvolu("I032", "TUBE", idtmed[211], I032dits, 3);  
+  } else {
+     // cooling freon for the end ladder - R.B. March,21-2001
+     I032dits[0] = 0;
+     I032dits[1] = I031dits[0];
+     I032dits[2] = I024dits[2];
+     gMC->Gsvolu("I032", "TUBE", idtmed[212], I032dits, 3);    
+  }
+  
+  // -- block of the SDD ladder frame holding the electronics
 
+  // edge of the ladder frame - part 1
   dits[0] = 0.2;
-  dits[1] = 0.1815;
-  dits[2] = 2.725;
+  dits[1] = 0.182;
+  dits[2] = 3.65;
   dits[3] = 0.015;
-  gMC->Gsvolu("I025", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I019", "TRD1", idtmed[208], dits, 4);  
 
+  // edge of the ladder frame - part 2
   dits[0] = 0.183;
   dits[1] = 0.165;
-  dits[2] = 2.725;
+  dits[2] = 3.65;
   dits[3] = 0.015;
-  gMC->Gsvolu("I026", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I020", "TRD1", idtmed[208], dits, 4);  
 
+  // inclined segments of the ladder frame
   dits[0] = 2.23;
   dits[1] = 2.1;
   dits[2] = 0.05;
   dits[3] = 0.03;
-  gMC->Gsvolu("I021", "TRD1", idtmed[200], dits, 4);  
-
-  dits[0] = 2.615;
-  dits[1] = 2.465;
-  dits[2] = 0.06;
-  dits[3] = 0.04;
-  gMC->Gsvolu("I023", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I021", "TRD1", idtmed[208], dits, 4);  
 
+  // horiz.segments of the ladders, normal to ladder edges
   dits[0] = 2.1;
   dits[1] = 2;
   dits[2] = 0.06;
   dits[3] = 0.04;
-  gMC->Gsvolu("I022", "TRD1", idtmed[200], dits, 4);  
-
-  dits[0] = 2.15;
-  dits[1] = 0.2;
-  dits[2] = 0.85;
-  gMC->Gsvolu("I028", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 1.25;
-  dits[1] = 0.6;
-  dits[2] = 0.075;
-  gMC->Gsvolu("I029", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 1.25;
-  dits[1] = 0.1;
-  dits[2] = 0.075;
-  dits[3] = 1;
-  gMC->Gsvolu("I030", "TRD1", idtmed[200], dits, 4);  
-
-  dits[0] = 1.6;
-  dits[1] = 7;
-  dits[2] = 0;
-  dits[3] = 0.075;
-  dits[4] = 0.775;
-  dits[5] = 0.775;
-  dits[6] = 0;
-  dits[7] = 0.075;
-  dits[8] = 0.376;
-  dits[9] = 0.376;
-  dits[10] = 0;
-  gMC->Gsvolu("I027", "TRAP", idtmed[200], dits, 11);  
-
-  dits[0] = 0;
-  dits[1] = 0.093;
-  dits[2] = 2.725;
-  gMC->Gsvolu("I032", "TUBE", idtmed[200], dits, 3);  
-
-  dits[0] = 0.093;
-  dits[1] = 0.1;
-  dits[2] = 2.725;
-  gMC->Gsvolu("I031", "TUBE", idtmed[200], dits, 3);  
-
-  dits[0] = 0.7;
-  dits[1] = 0.002;
-  dits[2] = 2.725;
-  gMC->Gsvolu("I046", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 0.2;
-  dits[1] = 0.182;
-  dits[2] = 3.65;
-  dits[3] = 0.015;
-  gMC->Gsvolu("I019", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I022", "TRD1", idtmed[208], dits, 4);  
 
-  dits[0] = 0.183;
-  dits[1] = 0.165;
-  dits[2] = 3.65;
-  dits[3] = 0.015;
-  gMC->Gsvolu("I020", "TRD1", idtmed[200], dits, 4);  
+  // horiz.segments of the ladders, at 45 deg. to ladder edges
+  dits[0] = 2.615;
+  dits[1] = 2.465;
+  dits[2] = 0.06;
+  dits[3] = 0.04;
+  gMC->Gsvolu("I023", "TRD1", idtmed[208], dits, 4);  
 
+  // supports of the ceramic pins holding the detectors
   dits[0] = 0.3;
   dits[1] = 0.05;
   dits[2] = 0.15;
-  gMC->Gsvolu("I033", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 0.2;
-  dits[1] = 0.01;
-  dits[2] = 0.05;
-  gMC->Gsvolu("I036", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I033", "BOX ", idtmed[208], dits, 3);  
 
+  // ceramic pins holding the detectors
   dits[0] = 0;
   dits[1] = 0.05;
   dits[2] = 0.225;
-  gMC->Gsvolu("I034", "TUBE", idtmed[200], dits, 3);  
-
-  dits[0] = 0.1;
-  dits[1] = 0.15;
-  dits[2] = 0.2;
-  gMC->Gsvolu("I035", "TUBE", idtmed[200], dits, 3);
+  gMC->Gsvolu("I034", "TUBE", idtmed[277], dits, 3);  
 
-  dits[0] = 0.7;
-  dits[1] = 0.002;
-  dits[2] = 3.65;
-  gMC->Gsvolu("I045", "BOX ", idtmed[200], dits, 3);  
+  // holders of cooling tubes
+  I035dits[0] = 0.1;
+  I035dits[1] = 0.15;
+  I035dits[2] = 0.2;
+  gMC->Gsvolu("I035", "TUBE", idtmed[208], I035dits, 3);
 
-  dits[0] = 0;
-  dits[1] = 0.093;
-  dits[2] = 3.65;
-  gMC->Gsvolu("I038", "TUBE", idtmed[200], dits, 3);  
-
-  dits[0] = 0.093;
-  dits[1] = 0.1;
-  dits[2] = 3.65;
-  gMC->Gsvolu("I037", "TUBE", idtmed[200], dits, 3);
-  
-  dits[0] = 1;
-  dits[1] = 0.01;
-  dits[2] = 3.6;
-  gMC->Gsvolu("I039", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 0.25;
+  // top holders of microcables
+  dits[0] = 0.2;
   dits[1] = 0.01;
-  dits[2] = 3.4;
-  gMC->Gsvolu("I040", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 0.1;
-  dits[1] = 0.12;
-  dits[2] = 3.4;
-  dits[3] = 90;
-  dits[4] = 320;
-  gMC->Gsvolu("I041", "TUBS", idtmed[200], dits, 5);  
+  dits[2] = 0.05;
+  gMC->Gsvolu("I036", "BOX ", idtmed[208], dits, 3);  
+
+  // inox cooling tubes - F.T. March,7-2001
+  I037dits[0] = 0.093;
+  I037dits[1] = 0.1;
+  I037dits[2] = I018dits[2];
+  gMC->Gsvolu("I037", "TUBE", idtmed[264], I037dits, 3);
+
+  if (fluid == 1) {
+     // cooling water - F.T. March,7-2001
+     I038dits[0] = 0;
+     I038dits[1] = I037dits[0];
+     I038dits[2] = I018dits[2];
+     gMC->Gsvolu("I038", "TUBE", idtmed[211], I038dits, 3);  
+  } else {
+     // cooling freon - R.B. March,21-2001
+     I038dits[0] = 0;
+     I038dits[1] = I037dits[0];
+     I038dits[2] = I018dits[2];
+     gMC->Gsvolu("I038", "TUBE", idtmed[212], I038dits, 3);    
+  }
+  // -- block of the SDD electronics (heat bridge, chips, hybrid, anode microcable)
 
-  dits[0] = 0.4;
-  dits[1] = 0.015;
-  dits[2] = 0.4;
-  gMC->Gsvolu("I042", "BOX ", idtmed[200], dits, 3);  
+  // SDD heat bridge - F.T. March,7-2001
+  I039dits[0] = 1.1000;
+  I039dits[1] = 0.0087;
+  I039dits[2] = 3.2500;
+  gMC->Gsvolu("I039", "BOX ", idtmed[268], I039dits, 3);  
 
+  // SDD clip part 1
   dits[0] = 0.25;
-  dits[1] = 0.015;
-  dits[2] = 0.25;
-  gMC->Gsvolu("I043", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 0.75;
-  dits[1] = 0.002;
-  dits[2] = 3.4;
-  gMC->Gsvolu("I044", "BOX ", idtmed[200], dits, 3);  
-
-  dits[0] = 1.8125;
-  dits[1] = 3.81;
-  dits[2] = 0;
-  dits[3] = 0.015;
-  dits[4] = 0.242;
-  dits[5] = 0.242;
-  dits[6] = 0;
-  dits[7] = 0.015;
-  dits[8] = 1E-03;
-  dits[9] = 1E-03;
-  dits[10] = 0;
-  gMC->Gsvolu("I303", "TRAP", idtmed[200], dits, 11);  
-
-  dits[0] = 1.8125;
-  dits[1] = 3.81;
-  dits[2] = 0;
-  dits[3] = 0.015;
-  dits[4] = 0.242;
-  dits[5] = 0.242;
-  dits[6] = 0;
-  dits[7] = 0.015;
-  dits[8] = 1E-03;
-  dits[9] = 1E-03;
-  dits[10] = 0;
-  gMC->Gsvolu("I403", "TRAP", idtmed[200], dits, 11);  
-
-  dits[0] = 3.5;
-  dits[1] = 0.014;
-  dits[2] = 3.763;
+  dits[1] = 0.01;
+  dits[2] = I039dits[2];
+  gMC->Gsvolu("I040", "BOX ", idtmed[268], dits, 3);  
+
+  // SDD clip part 2
+  I041dits[0] = 0.1;
+  I041dits[1] = 0.12;
+  I041dits[2] = I039dits[2];
+  I041dits[3] = 90;
+  I041dits[4] = 320;
+  gMC->Gsvolu("I041", "TUBS", idtmed[268], I041dits, 5);  
+
+
+  // SDD PASCAL - F.T. March,7-2001
+  I042dits[0] = 0.5000;
+  I042dits[1] = 0.0175;
+  I042dits[2] = 0.5000;
+  gMC->Gsvolu("I042", "BOX ", idtmed[206], I042dits, 3);  
+
+  // SDD AMBRA - F.T. March,7-2001
+  I043dits[0] = 0.3500;
+  I043dits[1] = 0.0175;
+  I043dits[2] = 0.5000;
+  gMC->Gsvolu("I043", "BOX ", idtmed[206], I043dits, 3);  
+
+  // SDD capacitors - F.T. March,7-2001
+  I051dits[0] = 0.1400;
+  I051dits[1] = 0.0350;
+  I051dits[2] = 0.0625;
+  gMC->Gsvolu("I051", "BOX ", idtmed[276], I051dits, 3);  
+
+  // SDD hybrid circuit - F.T. March,7-2001
+  I052dits[0] = 1.725000;
+  I052dits[1] = 0.003743;
+  I052dits[2] = I039dits[2];
+  gMC->Gsvolu("I052", "BOX ", idtmed[281], I052dits, 3);
+
+  // SDD anode microcable : changed - F.T. March,7-2001
+  I044dits[0] = I018dits[2];
+  I044dits[1] = I039dits[2];
+  I044dits[2] = 0.00084;
+  I044dits[3] = (15.189149/(I044dits[0]+I044dits[1]))/2;
+  gMC->Gsvolu("I044", "TRD1", idtmed[282], I044dits, 4);  
+  volI044 = ((2*I044dits[0] + 2*I044dits[1]) * 2*I044dits[2])/2 * 2*I044dits[3];
+
+  // SDD electronics box - F.T. March,7-2001
+  I050dits[1] = I039dits[1]+I052dits[1]+I051dits[1]+I044dits[2];
+  I050dits[0] = I018dits[1]/cos(30.*3.14159/180.)-I050dits[1]*sin(30.*3.14159/180.);
+  I050dits[2] = I018dits[2];
+  gMC->Gsvolu("I050", "BOX ", idtmed[209], I050dits, 3);
+
+  // SDD sensitive volume
+  dits[0] = 3.50850;
+  dits[1] = 0.01499; // not 0.015 because it is included into I302 which is 0.015
+  dits[2] = 3.76320;
   gMC->Gsvolu("ITS3", "BOX ", idtmed[200], dits, 3);  
 
-  dits[0] = 3.5;
-  dits[1] = 0.014;
-  dits[2] = 3.763;
+  // Like for ITS3 - F.T. March,7-2001
+  dits[0] = 3.50850;
+  dits[1] = 0.01499; // not 0.015 because it is included into I402 which is 0.015
+  dits[2] = 3.76320;
   gMC->Gsvolu("ITS4", "BOX ", idtmed[200], dits, 3);  
 
 
@@ -1130,320 +2011,348 @@ void AliITSvPPRsymm::CreateGeometry(){
   dits[0] = 0;
   dits[1] = 360;
   dits[2] = 6;
-  dits[3] = -57.5;
-  dits[4] = 43.5;
+  dits[3] = -57.45;
+  dits[4] = 43.6;
   dits[5] = 48;  
-  dits[6] = -51.365;
-  dits[7] = 43.5;
+  dits[6] = -49.15; 
+  dits[7] = 43.6;
   dits[8] = 48;  
-  dits[9] = -51.365;
-  dits[10] = 36.7;
+  dits[9] = -49.15;  
+  dits[10] = 36.9;
   dits[11] = 48;  
-  dits[12] = 51.3651;
-  dits[13] = 36.7;
+  dits[12] = 50.55;  
+  dits[13] = 36.9;
   dits[14] = 48;  
-  dits[15] = 51.3651;
-  dits[16] = 43.5;
+  dits[15] = 50.55;  
+  dits[16] = 43.6;
   dits[17] = 48;  
-  dits[18] = 56.96;
-  dits[19] = 43.5;
+  dits[18] = 57.45;
+  dits[19] = 43.6;
   dits[20] = 48;   
-  gMC->Gsvolu("IT56", "PCON", idtmed[200], dits, 21);   
+  gMC->Gsvolu("IT56", "PCON", idtmed[220], dits, 21);   
   
   dits[0] =  3.4;
   dits[1] = 1.955;
-  dits[2] = 57.13;
-  gMC->Gsvolu("I570", "BOX ", idtmed[200], dits, 3);  
+  dits[2] = 56.5; 
+  gMC->Gsvolu("I570", "BOX ", idtmed[204], dits, 3);  
   
   dits[0] = 3.75;
   dits[1] = 0.045;
   dits[2] = 50.975;
-  gMC->Gsvolu("I569", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I569", "BOX ", idtmed[204], dits, 3);  
   
   dits[0] = 3.4;
   dits[1] = 1.955;
-  dits[2] = 57.13;
-  gMC->Gsvolu("I571", "BOX ", idtmed[200], dits, 3);  
+  dits[2] = 47; 
+  gMC->Gsvolu("I571", "BOX ", idtmed[204], dits, 3);  
   
   dits[0] = 3.75;
   dits[1] = 0.045;
-  dits[2] = 45.21;
-  gMC->Gsvolu("I565", "BOX ", idtmed[200], dits, 3);  
+  dits[2] = 43.3;  
+  gMC->Gsvolu("I565", "BOX ", idtmed[204], dits, 3);  
   
   dits[0] = 3.4;
   dits[1] = 1.955;
   dits[2] = 3.15;
-  gMC->Gsvolu("I553", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I553", "BOX ", idtmed[204], dits, 3);  
   
   dits[0] = 3.405;
   dits[1] = 1.955;
   dits[2] = 1.955;
-  gMC->Gsvolu("I523", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I523", "BOX ", idtmed[204], dits, 3);  
   
   dits[0] = 3.75;
   dits[1] = 0.015;
   dits[2] = 2.1;
-  gMC->Gsvolu("I566", "BOX ", idtmed[200], dits, 3); 
+  gMC->Gsvolu("I566", "BOX ", idtmed[206], dits, 3); 
   
   dits[0] = 3.4;
   dits[1] = 1.955;
   dits[2] = 3.15;
-  gMC->Gsvolu("I544", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I544", "BOX ", idtmed[204], dits, 3);  
   
   dits[0] = 3.41;
   dits[1] = 1.955;
   dits[2] = 1.955;
-  gMC->Gsvolu("I516", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I516", "BOX ", idtmed[204], dits, 3);  
   
   dits[0] = 3.75;
   dits[1] = 0.015;
   dits[2] = 2.1;
-  gMC->Gsvolu("I562", "BOX ", idtmed[200], dits, 3);   
-  
-  dits[0] = 0;
-  dits[1] = 0.07;
-  dits[2] = 3.15;
-  gMC->Gsvolu("I559", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I562", "BOX ", idtmed[206], dits, 3);   
+  
+  if (fluid == 1) {
+     dits[0] = 0;
+     dits[1] = 0.07;
+     dits[2] = 3.15;
+     gMC->Gsvolu("I559", "TUBE", idtmed[211], dits, 3);  // set water as cooling fluid
+  } else {
+     dits[0] = 0;
+     dits[1] = 0.07;
+     dits[2] = 3.15;
+     gMC->Gsvolu("I559", "TUBE", idtmed[212], dits, 3);  // set freon as cooling fluid
+  }
   
   dits[0] = 0.07;
   dits[1] = 0.1;
   dits[2] = 3.15;
-  gMC->Gsvolu("I560", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I560", "TUBE", idtmed[210], dits, 3);  
   
   dits[0] = 0.225;
   dits[1] = 0.195;
   dits[2] = 3.15;
   dits[3] = 0.025;
-  gMC->Gsvolu("I558", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I558", "TRD1", idtmed[203], dits, 4);  
   
   dits[0] = 0.25;
   dits[1] = 0.22;
   dits[2] = 3.15;
   dits[3] = 0.025;
-  gMC->Gsvolu("I557", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I557", "TRD1", idtmed[203], dits, 4);  
   
   dits[0] = 2.17;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I556", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I556", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 2 ;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I554", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I554", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 2.675;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I555", "BOX ", idtmed[200], dits, 3); 
+  gMC->Gsvolu("I555", "BOX ", idtmed[203], dits, 3); 
   
   dits[0] = 0.3;
   dits[1] = 0.15;
   dits[2] = 0.15;
-  gMC->Gsvolu("I561", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I561", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 0.025;
   dits[1] = 0.025;
   dits[2] = 0.05;
-  gMC->Gsvolu("I519", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I519", "BOX ", idtmed[214], dits, 3);  
   
   dits[0] = 0.304;
   dits[1] = 0.0275;
   dits[2] = 0.432;
-  gMC->Gsvolu("I521", "BOX ", idtmed[200], dits, 3);   
+  gMC->Gsvolu("I521", "BOX ", idtmed[206], dits, 3);   
   
   dits[0] = 0.16;
   dits[1] = 0.08;
   dits[2] = 0.08;
-  gMC->Gsvolu("I520", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I520", "BOX ", idtmed[214], dits, 3);  
   
   dits[0] = 3.4;
   dits[1] = 0.015;
   dits[2] = 0.525;
-  gMC->Gsvolu("I518", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I518", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 0.15;
   dits[1] = 0.105;
   dits[2] = 0.29;
   dits[3] = 0.08;
-  gMC->Gsvolu("I522", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I522", "TRD1", idtmed[203], dits, 4);  
   
   dits[0] = 0.07;
   dits[1] = 0.1;
   dits[2] = 1.955;
-  gMC->Gsvolu("I542", "TUBE", idtmed[200], dits, 3);  
-  
-  dits[0] = 0;
-  dits[1] = 0.07;
-  dits[2] = 1.955;
-  gMC->Gsvolu("I541", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I542", "TUBE", idtmed[210], dits, 3);  
+  
+  if (fluid == 1) {
+     dits[0] = 0;
+     dits[1] = 0.07;
+     dits[2] = 1.955;
+     gMC->Gsvolu("I541", "TUBE", idtmed[211], dits, 3);  // set water as cooling fluid 
+  } else {
+     dits[0] = 0;
+     dits[1] = 0.07;
+     dits[2] = 1.955;
+     gMC->Gsvolu("I541", "TUBE", idtmed[212], dits, 3);  // set freon as cooling fluid
+  }
   
   dits[0] = 0.3;
   dits[1] = 0.15;
   dits[2] = 0.15;
-  gMC->Gsvolu("I543", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I543", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 0.25;
   dits[1] = 0.22;
   dits[2] = 1.955;
   dits[3] = 0.025;
-  gMC->Gsvolu("I537", "TRD1", idtmed[200], dits, 4); 
+  gMC->Gsvolu("I537", "TRD1", idtmed[203], dits, 4); 
   
   dits[0] = 0.225;
   dits[1] = 0.195;
   dits[2] = 1.955;
   dits[4] = 0.025;
-  gMC->Gsvolu("I538", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I538", "TRD1", idtmed[203], dits, 4);  
   
   dits[0] = 2.17;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I536", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I536", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 2.675;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I535", "BOX ", idtmed[200], dits, 3);   
+  gMC->Gsvolu("I535", "BOX ", idtmed[203], dits, 3);   
   
   dits[0] = 2;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I534", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I534", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 0;
   dits[1] = 0.05;
   dits[2] = 0.17;
-  gMC->Gsvolu("I540", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I540", "TUBE", idtmed[203], dits, 3);  
   
   dits[0] = 0;
   dits[1] = 0.05;
   dits[2] = 0.205;
-  gMC->Gsvolu("I539", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I539", "TUBE", idtmed[203], dits, 3);  
   
   dits[0] = 3.65;
   dits[1] = 0.015;
   dits[2] = 2;
   gMC->Gsvolu("ITS6", "BOX ", idtmed[200], dits, 3);  
   
-  dits[0] = 0;
-  dits[1] = 0.07;
-  dits[2] = 3.15;
-  gMC->Gsvolu("I550", "TUBE", idtmed[200], dits, 3);  
+  if (fluid == 1) {
+     dits[0] = 0;
+     dits[1] = 0.07;
+     dits[2] = 3.15;
+     gMC->Gsvolu("I550", "TUBE", idtmed[211], dits, 3);  // set water as cooling fluid
+  } else {
+     dits[0] = 0;
+     dits[1] = 0.07;
+     dits[2] = 3.15;
+     gMC->Gsvolu("I550", "TUBE", idtmed[212], dits, 3);  // set freon as cooling fluid
+  }
   
   dits[0] = 0.07;
   dits[1] = 0.1;
   dits[2] = 3.15;
-  gMC->Gsvolu("I551", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I551", "TUBE", idtmed[210], dits, 3);  
   
   dits[0] = 0.225;
   dits[1] = 0.195;
   dits[2] = 3.15;
   dits[3] = 0.025;
-  gMC->Gsvolu("I549", "TRD1", idtmed[200], dits, 4); 
+  gMC->Gsvolu("I549", "TRD1", idtmed[203], dits, 4); 
   
   dits[0] = 0.25;
   dits[1] = 0.22;
   dits[2] = 3.15;
   dits[3] = 0.025;
-  gMC->Gsvolu("I548", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I548", "TRD1", idtmed[203], dits, 4);  
   
   dits[0] = 2.17;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I547", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I547", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 2;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I545", "BOX ", idtmed[200], dits, 3);   
+  gMC->Gsvolu("I545", "BOX ", idtmed[203], dits, 3);   
   
   dits[0] = 2.675;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I546", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I546", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 0.3;
   dits[1] = 0.15;
   dits[2] = 0.15;
-  gMC->Gsvolu("I552", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I552", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 0.304;
   dits[1] = 0.0275;
   dits[2] = 0.4322;
-  gMC->Gsvolu("I515", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I515", "BOX ", idtmed[206], dits, 3);  
   
   dits[0] = 0.025;
   dits[1] = 0.025;
   dits[2] = 0.05;
-  gMC->Gsvolu("I513", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I513", "BOX ", idtmed[214], dits, 3);  
   
   dits[0] = 0.16;
   dits[1] = 0.08;
   dits[2] = 0.08;
-  gMC->Gsvolu("I514", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I514", "BOX ", idtmed[214], dits, 3);  
   
   dits[0] = 3.4;
   dits[1] = 0.015;
   dits[2] = 0.525;
-  gMC->Gsvolu("I512", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I512", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 0.225;
   dits[1] = 0.195;
   dits[2] = 1.955;
   dits[3] = 0.025;
-  gMC->Gsvolu("I528", "TRD1", idtmed[200], dits, 4); 
+  gMC->Gsvolu("I528", "TRD1", idtmed[203], dits, 4); 
   
   dits[0] = 0.25;
   dits[1] = 0.22;
   dits[2] = 1.955;
   dits[3] = 0.025;
-  gMC->Gsvolu("I527", "TRD1", idtmed[200], dits, 4);  
+  gMC->Gsvolu("I527", "TRD1", idtmed[203], dits, 4);  
   
   dits[0] = 2.17;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I526", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I526", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 2.675;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I525", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I525", "BOX ", idtmed[203], dits, 3);  
    
   dits[0] = 2;
   dits[1] = 0.035;
   dits[2] = 0.05;
-  gMC->Gsvolu("I524", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I524", "BOX ", idtmed[203], dits, 3);  
    
   dits[0] = 0;
   dits[1] = 0.05;
   dits[2] = 0.205;
-  gMC->Gsvolu("I529", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I529", "TUBE", idtmed[203], dits, 3);  
    
   dits[0] = 0;
   dits[1] = 0.05;
   dits[2] = 0.17;
-  gMC->Gsvolu("I530", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I530", "TUBE", idtmed[203], dits, 3);  
    
   dits[0] = 0.15;
   dits[1] = 0.105;
   dits[2] = 0.29;
   dits[3] = 0.08;
-  gMC->Gsvolu("I517", "TRD1", idtmed[200], dits, 4);  
-  
-  dits[0] = 0;
-  dits[1] = 0.07;
-  dits[2] = 1.955;
-  gMC->Gsvolu("I531", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I517", "TRD1", idtmed[203], dits, 4);  
+  
+  if (fluid == 1) {
+     dits[0] = 0;
+     dits[1] = 0.07;
+     dits[2] = 1.955;
+     gMC->Gsvolu("I531", "TUBE", idtmed[211], dits, 3);  // set water as cooling fluid
+  } else {
+     dits[0] = 0;
+     dits[1] = 0.07;
+     dits[2] = 1.955;
+     gMC->Gsvolu("I531", "TUBE", idtmed[212], dits, 3);  // set freon as cooling fluid
+  }
      
   dits[0] = 0.07;
   dits[1] = 0.1;
   dits[2] = 1.955;
-  gMC->Gsvolu("I532", "TUBE", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I532", "TUBE", idtmed[210], dits, 3);  
  
   dits[0] = 0.3;
   dits[1] = 0.15;
   dits[2] = 0.15;
-  gMC->Gsvolu("I533", "BOX ", idtmed[200], dits, 3);  
+  gMC->Gsvolu("I533", "BOX ", idtmed[203], dits, 3);  
   
   dits[0] = 3.65;
   dits[1] = 0.015;
@@ -1451,339 +2360,1016 @@ void AliITSvPPRsymm::CreateGeometry(){
   gMC->Gsvolu("ITS5", "BOX ", idtmed[200], dits, 3);  
 
 
-     
-  // --- Place SPD (version 'a') volumes into their mother volume IT12
-
-  gMC->Gspos("I12A",5,"IT12",0.0,0.0,0.0,idrotm[238],"MANY");
-  gMC->Gspos("I12A",6,"IT12",0.0,0.0,0.0,idrotm[236],"MANY");
-  gMC->Gspos("I12A",7,"IT12",0.0,0.0,0.0,idrotm[239],"MANY");
-  gMC->Gspos("I12A",8,"IT12",0.0,0.0,0.0,idrotm[233],"MANY");
-  gMC->Gspos("I12A",9,"IT12",0.0,0.0,0.0,idrotm[240],"MANY");
-  gMC->Gspos("I12A",10,"IT12",0.0,0.0,0.0,idrotm[241],"MANY");
-  gMC->Gspos("I12A",2,"IT12",0.0,0.0,0.0,idrotm[242],"MANY");
-  gMC->Gspos("I12A",3,"IT12",0.0,0.0,0.0,idrotm[234],"MANY");
-  gMC->Gspos("I12A",4,"IT12",0.0,0.0,0.0,idrotm[243],"MANY");
-  gMC->Gspos("I12A",1,"IT12",0.0,0.0,0.0,0,"MANY");
-  gMC->Gspos("I10A",2,"I12A",0.203,3.8206,0.0,idrotm[244],"ONLY");
-  gMC->Gspos("I10A",1,"I12A",1.4531,3.8152,0.0,idrotm[245],"ONLY");
-  gMC->Gspos("I20A",1,"I12A",3.0174,6.5143,0.0,idrotm[246],"ONLY");
-  gMC->Gspos("I20A",2,"I12A",1.9612,6.9062,0.0,idrotm[247],"ONLY");
-  gMC->Gspos("I20A",3,"I12A",0.8567,7.1279,0.0,idrotm[248],"ONLY");
-  gMC->Gspos("I20A",4,"I12A",-0.2689,7.1742,0.0,idrotm[249],"ONLY");
-  gMC->Gspos("I123",2,"I12A",-0.2978,5.5196,0.0,idrotm[214],"ONLY");
-  gMC->Gspos("I121",2,"I12A",-0.2385,4.1518,0.0,idrotm[213],"ONLY");
-  gMC->Gspos("I122",2,"I12A",-0.2968,4.0207,0.0,idrotm[212],"ONLY");
-  gMC->Gspos("I120",2,"I12A",-0.3672,3.9056,0.0,0,"ONLY");
-  gMC->Gspos("I144",1,"I12A",-0.2538,3.8556,0.0,0,"ONLY");
-  gMC->Gspos("I113",3,"I12A",0.1095,3.9056,0.0,0,"ONLY");
-  gMC->Gspos("I143",1,"I12A",0.4365,3.8556,0.0,idrotm[236],"ONLY");
-  gMC->Gspos("I142",1,"I12A",0.5136,3.9056,0.0,idrotm[235],"ONLY");
-  gMC->Gspos("I141",1,"I12A",0.5636,3.9752,0.0,idrotm[201],"ONLY");
-  gMC->Gspos("I140",1,"I12A",0.6336,4.0447,0.0,idrotm[234],"ONLY");
-  gMC->Gspos("I139",1,"I12A",0.8297,4.0545,0.0,idrotm[207],"ONLY");
-  gMC->Gspos("I113",5,"I12A",1.2575,3.9681,0.0,idrotm[207],"ONLY");
-  gMC->Gspos("I138",1,"I12A",1.66,3.7848,0.0,idrotm[207],"ONLY");
-  gMC->Gspos("I137",1,"I12A",1.8556,3.7738,0.0,idrotm[233],"ONLY");
-  gMC->Gspos("I136",1,"I12A",2.6224,4.874,0.0,idrotm[232],"ONLY");
-  gMC->Gspos("I135",1,"I12A",3.2967,6.0337,0.0,idrotm[231],"ONLY");
-  gMC->Gspos("I134",1,"I12A",3.266,6.1636,0.0,idrotm[230],"ONLY");
-  gMC->Gspos("I113",1,"I12A",2.9903,6.4144,0.0,idrotm[211],"ONLY");
-  gMC->Gspos("I133",3,"I12A",2.7631,6.7627,0.0,idrotm[230],"ONLY");
-  gMC->Gspos("I132",3,"I12A",2.62,6.8555,0.0,idrotm[229],"ONLY");
-  gMC->Gspos("I131",3,"I12A",2.648,6.6023,0.0,idrotm[228],"ONLY");
-  gMC->Gspos("I130",3,"I12A",2.6569,6.3431,0.0,idrotm[227],"ONLY");
-  gMC->Gspos("I129",3,"I12A",2.3906,6.4819,0.0,idrotm[226],"ONLY");
-  gMC->Gspos("I113",2,"I12A",1.9488,6.7998,0.0,idrotm[210],"ONLY");
-  gMC->Gspos("I133",2,"I12A",1.6699,7.1085,0.0,idrotm[226],"ONLY");
-  gMC->Gspos("I132",2,"I12A",1.5142,7.1777,0.0,idrotm[225],"ONLY");
-  gMC->Gspos("I131",2,"I12A",1.5814,6.932,0.0,idrotm[224],"ONLY");
-  gMC->Gspos("I130",2,"I12A",1.6308,6.6774,0.0,idrotm[223],"ONLY");
-  gMC->Gspos("I129",2,"I12A",1.346,6.7728,0.0,idrotm[222],"ONLY");
-  gMC->Gspos("I113",6,"I12A",0.8599,7.0176,0.0,idrotm[209],"ONLY");
-  gMC->Gspos("I133",1,"I12A",0.5362,7.2789,0.0,idrotm[222],"ONLY");
-  gMC->Gspos("I132",1,"I12A",0.3715,7.3228,0.0,idrotm[221],"ONLY");
-  gMC->Gspos("I131",1,"I12A",0.4763,7.0907,0.0,idrotm[220],"ONLY");
-  gMC->Gspos("I130",1,"I12A",0.5649,6.8469,0.0,idrotm[219],"ONLY");
-  gMC->Gspos("I129",1,"I12A",0.2688,6.8966,0.0,idrotm[218],"ONLY");
-  gMC->Gspos("I113",4,"I12A",-0.2497,7.0624,0.0,idrotm[208],"ONLY");
-  gMC->Gspos("I128",1,"I12A",-0.6103,7.2698,0.0,idrotm[218],"ONLY");
-  gMC->Gspos("I126",2,"I12A",-0.7799,7.2874,0.0,idrotm[217],"ONLY");
-  gMC->Gspos("I125",2,"I12A",-0.6315,7.0883,0.0,idrotm[216],"ONLY");
-  gMC->Gspos("I124",2,"I12A",-0.4965,6.8742,0.0,idrotm[215],"ONLY");
-  gMC->Gspos("I103",3,"I10A",-0.05,0.0075,-3.536,idrotm[237],"ONLY");
-  gMC->Gspos("I103",4,"I10A",-0.05,0.0075,-10.708,idrotm[237],"ONLY");
-  gMC->Gspos("I103",1,"I10A",-0.05,0.0075,10.708,0,"ONLY");
-  gMC->Gspos("I103",2,"I10A",-0.05,0.0075,3.536,0,"ONLY");
-  gMC->Gspos("I105",1,"I10A",-0.05,0.01,-16.844,idrotm[237],"ONLY");
-  gMC->Gspos("I105",2,"I10A",-0.05,0.01,16.844,0,"ONLY");
-  gMC->Gspos("I104",1,"I10A",0.0,-0.015,0.0,0,"ONLY");
-  gMC->Gspos("I1D3",1,"I20A",-0.05,0.0075,-3.536,idrotm[237],"ONLY");
-  gMC->Gspos("I1D3",2,"I20A",-0.05,0.0075,-10.708,idrotm[237],"ONLY");
-  gMC->Gspos("I1D3",3,"I20A",-0.05,0.0075,10.708,0,"ONLY");
-  gMC->Gspos("I1D3",4,"I20A",-0.05,0.0075,3.536,0,"ONLY");
-  gMC->Gspos("I105",3,"I20A",-0.05,0.01,-16.844,idrotm[237],"ONLY");
-  gMC->Gspos("I105",4,"I20A",-0.05,0.01,16.844,0,"ONLY");
-  gMC->Gspos("I104",2,"I20A",0.0,-0.015,0.0,0,"ONLY");
-  gMC->Gspos("I112",2,"I113",0.25,0.02,0.0,idrotm[206],"ONLY");
-  gMC->Gspos("I111",2,"I113",0.1318,-0.0008,0.0,idrotm[205],"ONLY");
-  gMC->Gspos("I118",1,"I113",0.0,-0.0454,0.0,0,"ONLY");
-  gMC->Gspos("I110",1,"I113",0.0,0.0492,0.0,0,"ONLY");
-  gMC->Gspos("I114",1,"I113",0.063,0.0042,0.0,idrotm[202],"ONLY");
-  gMC->Gspos("I115",1,"I113",0.063,0.0042,0.0,idrotm[202],"ONLY");
-  gMC->Gspos("I115",2,"I113",-0.063,0.0042,0.0,idrotm[201],"ONLY");
-  gMC->Gspos("I114",2,"I113",-0.063,0.0042,0.0,idrotm[201],"ONLY");
-  gMC->Gspos("I116",1,"I113",0.0,0.0042,0.0,0,"ONLY");
-  gMC->Gspos("I111",1,"I113",-0.1318,-0.0008,0.0,idrotm[204],"ONLY");
-  gMC->Gspos("I112",1,"I113",-0.25,0.02,0.0,idrotm[203],"ONLY");
-  gMC->Gspos("I101",1,"I103",-0.088,0.0075,0.0,0,"ONLY");
-  gMC->Gspos("I102",1,"I103",0.0,-0.005,-2.8,0,"ONLY");
-  gMC->Gspos("I102",2,"I103",0.0,-0.005,-1.4,0,"ONLY");
-  gMC->Gspos("I102",3,"I103",0.0,-0.005,0.0,0,"ONLY");
-  gMC->Gspos("I102",4,"I103",0.0,-0.005,1.4,0,"ONLY");
-  gMC->Gspos("I102",5,"I103",0.0,-0.005,2.8,0,"ONLY");
-  gMC->Gspos("I1D1",1,"I1D3",-0.088,0.0075,0.0,0,"ONLY");
-  gMC->Gspos("I102",6,"I1D3",0.0,-0.005,-2.8,0,"ONLY");
-  gMC->Gspos("I102",7,"I1D3",0.0,-0.005,-1.4,0,"ONLY");
-  gMC->Gspos("I102",8,"I1D3",0.0,-0.005,0.0,0,"ONLY");
-  gMC->Gspos("I102",9,"I1D3",0.0,-0.005,1.4,0,"ONLY");
-  gMC->Gspos("I102",10,"I1D3",0.0,-0.005,2.8,0,"ONLY");
-  gMC->Gspos("I117",1,"I116",0.0,0.0,0.0,0,"ONLY");
-  gMC->Gspos("ITS1",1,"I101",0.0,0.0,0.0,0,"ONLY");
-  gMC->Gspos("ITS2",1,"I1D1",0.0,0.0,0.0,0,"ONLY");
+
+  // --- Define volumes of shield of SPD ----------------
+
+
+  dits[0] = 8.37;
+  dits[1] = 9.93;
+  dits[2] = 25;
+  gMC->Gsvolu("IC01", "TUBE", idtmed[289], dits, 3);   
+
+  dits[0] = 8.3;
+  dits[1] = 9.995;
+  dits[2] = 17.5/2.;
+  gMC->Gsvolu("IC02", "TUBE", idtmed[289], dits, 3);    
+  
+  // --- Define volume of first cylinder between SPD and SDD --------------
+  
+  dits[0] = (21.-0.128)/2.;      
+  dits[1] = 21./2.;
+  dits[2] = 39.4;      
+  gMC->Gsvolu("ICY1", "TUBE", idtmed[208], dits, 3);
+         
+  // --- Define volume of second cylinder between SDD and SSD --------------
+
+  dits[0] = (59.5-0.128)/2.;      
+  dits[1] = 59.5/2.;
+  dits[2] = 56.2;      // was 57
+  gMC->Gsvolu("ICY2", "TUBE", idtmed[208], dits, 3);
+
+  // --- Define volumes of SDD cone ---------------------------------- 
+
+  dits[0] = 0;
+  dits[1] = 360;
+  dits[2] = 12;
+  dits[3] = -59.7;
+  dits[4] = 27;
+  dits[5] = 28.6;
+  dits[6] = -42.7;
+  dits[7] = 10;
+  dits[8] = 28.6;
+  dits[9] = -34.65;
+  dits[10] = 10;
+  dits[11] = 28.6;
+  dits[12] = -34.65;
+  dits[13] = 10;
+  dits[14] = 23.495;
+  dits[15] = -23.7;
+  dits[16] = 10;
+  dits[17] = 23.495;
+  dits[18] = -23.7;
+  dits[19] = 10;
+  dits[20] = 14.595;
+  dits[21] = 23.7;
+  dits[22] = 10;
+  dits[23] = 14.595;
+  dits[24] = 23.7;
+  dits[25] = 10;
+  dits[26] = 23.495;
+  dits[27] = 34.65;
+  dits[28] = 10;
+  dits[29] = 23.495;
+  dits[30] = 34.65;
+  dits[31] = 10;
+  dits[32] = 28.6;
+  dits[33] = 42.7;
+  dits[34] = 10;
+  dits[35] = 28.6;
+  dits[36] = 59.7;
+  dits[37] = 27.2637;
+  dits[38] = 28.6;             
+  gMC->Gsvolu("IS02", "PCON", idtmed[204], dits, 39);
+  
+  dits[0] = 0;
+  dits[1] = 360;
+  dits[2] = 6;
+  dits[3] = 38.65;
+  dits[4] = 10.75;    
+  dits[5] = 12.25;      
+  dits[6] = 40.15;
+  dits[7] = 10.75;
+  dits[8] = 13.96;   
+  dits[9] = 40.15;
+  dits[10] = 12.46;  
+  dits[11] = 13.96;
+  dits[12] = 55.75;
+  dits[13] = 27;
+  dits[14] = 28.5;
+  dits[15] = 55.75;
+  dits[16] = 27;
+  dits[17] = 28.5;
+  dits[18] = 57.25;
+  dits[19] = 27;
+  dits[20] = 28.5;       
+  gMC->Gsvolu("I093", "PCON", idtmed[272], dits, 21);  // SDD cone
+
+  dits[0] = 0;
+  dits[1] = 50;
+  dits[2] = 3;
+  dits[3] = 39;  
+  dits[4] = 14;
+  dits[5] = 18.75;
+  dits[6] = 46.7-3;
+  dits[7] = 14;
+  dits[8] = 18.75;
+  dits[9] = 51.45-3;
+  dits[10] = 18.75;
+  dits[11] = 18.75;
+  gMC->Gsvolu("I099", "PCON", idtmed[204], dits, 12); // SDD 3 cone hole
+
+  dits[0] = 0;
+  dits[1] = 25;
+  dits[2] = 3;
+  dits[3] = 49;
+  dits[4] = 23.4;
+  dits[5] = 26.4;
+  dits[6] = 56.1-3;
+  dits[7] = 23.4;
+  dits[8] = 26.4;
+  dits[9] = 59.1-3;
+  dits[10] = 26.4;
+  dits[11] = 26.4;
+  gMC->Gsvolu("I200", "PCON", idtmed[204], dits, 12); // SDD 4 cone hole
+
+  dits[0] = 10.0;
+  dits[1] = 10.5;
+  dits[2] = 0.25;
+  gMC->Gsvolu("I090", "TUBE", idtmed[224], dits, 3);  // SDD cylinder flange
+
+  dits[0] = 21.95;
+  dits[1] = 22.95;    
+  dits[2] = 1;
+  gMC->Gsvolu("I098", "TUBE", idtmed[283], dits, 3);    // ladder support on layer 4
+
+  dits[0] = 13.1;    
+  dits[1] = 14.1;    
+  dits[2] = 1;
+  gMC->Gsvolu("I097", "TUBE", idtmed[283], dits, 3);    // ladder support on layer 3
+
+  dits[0] = 1;
+  dits[1] = 1;
+  dits[2] = 7.74;
+  gMC->Gsvolu("I202", "BOX ", idtmed[272], dits, 3);
+
+  dits[0] = 1;
+  dits[1] = 1;
+  dits[2] = 9.14;
+  gMC->Gsvolu("I203", "BOX ", idtmed[272], dits, 3);
+
+  dits[0] = 21.95;
+  dits[1] = 22.95;
+  dits[2] = 1;
+  gMC->Gsvolu("I095", "TUBE", idtmed[224], dits, 3);
+
+  dits[0] = 3;
+  dits[1] = 2.7;
+  dits[2] = 1;
+  dits[3] = 0.63;
+  gMC->Gsvolu("I096", "TRD1", idtmed[264], dits, 4);
+
+  dits[0] = 13.1;
+  dits[1] = 14.1;
+  dits[2] = 1;
+  gMC->Gsvolu("I094", "TUBE", idtmed[224], dits, 3);
+  
+  
+  // --- Define volumes of SSD cone ----------------------------------    
+            
+
+  dits[0] = 0;
+  dits[1] = 360;
+  dits[2] = 12;
+  dits[3] = -zmax;
+  dits[4] = 46;         
+  dits[5] = 49.25;       
+  dits[6] = -61.2;
+  dits[7] = 28.7;
+  dits[8] = 49.25;       
+  dits[9] = -57.5;
+  dits[10] = 28.7;
+  dits[11] = 49.25;      
+  dits[12] = -57.5;
+  dits[13] = 28.7;
+  dits[14] = 43.5;
+  dits[15] = -49.2;
+  dits[16] = 28.7;
+  dits[17] = 43.5;
+  dits[18] = -49.2;
+  dits[19] = 28.7;
+  dits[20] = 36.85;
+  dits[21] = 50.6;
+  dits[22] = 28.7;
+  dits[23] = 36.85;
+  dits[24] = 50.6;
+  dits[25] = 28.7;
+  dits[26] = 43.5;
+  dits[27] = 57.5;
+  dits[28] = 28.7;
+  dits[29] = 43.5;
+  dits[30] = 57.5;
+  dits[31] = 28.7;
+  dits[32] = 49.25;      
+  dits[33] = 61.2;
+  dits[34] = 28.7;
+  dits[35] = 49.25;      
+  dits[36] = zmax;
+  dits[37] = 46;      
+  dits[38] = 49.25;      
+  gMC->Gsvolu("IS01", "PCON", idtmed[204], dits, 39);   // SSD cone mother volume
+  
+  dits[0] = 0;
+  dits[1] = 360;
+  dits[2] = 6;
+  dits[3] = -zmax;  
+  dits[4] = 47.75;  
+  dits[5] = 49.25;  
+  dits[6] = -zmax+2.;  
+  dits[7] = 47.75;  
+  dits[8] = 49.25;   
+  dits[9] = -71.2819;
+  dits[10] = 46.75;   
+  dits[11] = 49.0319;
+  dits[12] = -57.25;   // was 58.5 
+  dits[13] = 32.9681;
+  dits[14] = 34.75;
+  dits[15] = -57.25;   // was 58.5   
+  dits[16] = 30;
+  dits[17] = 34.75;
+  dits[18] = -55.75;   // was 57 
+  dits[19] = 30;     
+  dits[20] = 32.25;    // was 31.5 
+  gMC->Gsvolu("I212", "PCON", idtmed[272], dits, 21);  // SSD cone
+  
+  dits[0] = 28.75;          
+  dits[1] = 29.75;   
+  dits[2] = 0.5;
+  gMC->Gsvolu("I211", "TUBE", idtmed[224], dits, 3);   // SSD cylinder flange
+  
+  dits[0] = 35.8;   
+  dits[1] = 36.8;   
+  dits[2] = 1;
+  gMC->Gsvolu("I217", "TUBE", idtmed[283], dits, 3);   // ladder support on layer 5 
+  
+  dits[0] = 41.4;  
+  dits[1] = 42.4;  
+  dits[2] = 1;
+  gMC->Gsvolu("I219", "TUBE", idtmed[283], dits, 3);   // ladder support on layer 6
+        
+  dits[0] = 42.05+5.;       
+  dits[1] = 42.55+5.;     
+  dits[2] = 1.25;
+  gMC->Gsvolu("I214", "TUBE", idtmed[224], dits, 3);   // layer 6 electronic support
+                                                       // this will change after PPR
+  dits[0] = 37.05+5.;   
+  dits[1] = 37.55+5.;   
+  dits[2] = 1.25;
+  gMC->Gsvolu("I213", "TUBE", idtmed[224], dits, 3);   // layer 5 electronic support
+                                                       // this will change after PPR
+  dits[0] = 0;
+  dits[1] = 25;
+  dits[2] = 5;
+  dits[3] = -zmax+3;
+  dits[4] = 45.5;
+  dits[5] = 45.5;
+  dits[6] = -69.7+3;
+  dits[7] = 37;
+  dits[8] = 45.5;
+  dits[9] = -68.5+3;
+  dits[10] = 37;
+  dits[11] = 45.5;
+  dits[12] = -68.5+4.8;  
+  dits[13] = 37;
+  dits[14] = 45.5; 
+  dits[15] = -63.5+4.8;
+  dits[16] = 37;
+  dits[17] = 45.5;   
+  gMC->Gsvolu("I215", "PCON", idtmed[204], dits, 18);  // SSD cone hole 
+  dits[0] = 0;
+  dits[1] = 3.2;
+  dits[2] = 9;
+  dits[3] = -14;
+  dits[4] = 30.5;
+  dits[5] = 33.5;
+  dits[6] = -9.85;
+  dits[7] = 30.5;
+  dits[8] = 33.5;
+  dits[9] = -9.85;
+  dits[10] = 30.5;
+  dits[11] = 43.45;
+  dits[12] = -7.85;
+  dits[13] = 30.5;
+  dits[14] = 43.45;
+  dits[15] = -7.85;
+  dits[16] = 30.5;
+  dits[17] = 36.5;
+  dits[18] = -7;
+  dits[19] = 30.5;
+  dits[20] = 36.5;
+  dits[21] = -4;
+  dits[22] = 33.0173;
+  dits[23] = 36.5;
+  dits[24] = -4;
+  dits[25] = 33.0173;
+  dits[26] = 36.80;
+  dits[27] = -2;
+  dits[28] = 34.6955;
+  dits[29] = 36.80;
+  gMC->Gsvolu("I216", "PCON", idtmed[272], dits, 30); // supports (1-6) of the ladders
+       
+       
+  // --- Place SPD (option 'a') volumes into their mother volume IT12
+  
+  // SPD - option 'a' 
+  // (this is NOT the default)
+
+  if (option == 1) {
+
+     gMC->Gspos("I12A",5,"IT12",0.0,0.0,0.0,idrotm[238],"MANY");
+     gMC->Gspos("I12A",6,"IT12",0.0,0.0,0.0,idrotm[236],"MANY");
+     gMC->Gspos("I12A",7,"IT12",0.0,0.0,0.0,idrotm[239],"MANY");
+     gMC->Gspos("I12A",8,"IT12",0.0,0.0,0.0,idrotm[233],"MANY");
+     gMC->Gspos("I12A",9,"IT12",0.0,0.0,0.0,idrotm[240],"MANY");
+     gMC->Gspos("I12A",10,"IT12",0.0,0.0,0.0,idrotm[241],"MANY");
+     gMC->Gspos("I12A",2,"IT12",0.0,0.0,0.0,idrotm[242],"MANY");
+     gMC->Gspos("I12A",3,"IT12",0.0,0.0,0.0,idrotm[234],"MANY");
+     gMC->Gspos("I12A",4,"IT12",0.0,0.0,0.0,idrotm[243],"MANY");
+     gMC->Gspos("I12A",1,"IT12",0.0,0.0,0.0,0,"MANY");
+     deltax=((ddet1-0.01/2.)+(dchip1-0.015/2.))*TMath::Cos(270.*TMath::Pi()/180.);  // see definition of idrotm[244]
+         deltay=((ddet1-0.01/2.)+(dchip1-0.015/2.))*TMath::Sin(270.*TMath::Pi()/180.);  // see definition of idrotm[244]
+     gMC->Gspos("I10A",2,"I12A",0.203+deltax,3.8206+deltay,0.0,idrotm[244],"ONLY");      
+     deltax=((ddet1-0.01/2.)+(dchip1-0.015/2.))*TMath::Cos(252.*TMath::Pi()/180.);  // see definition of idrotm[245]
+         deltay=((ddet1-0.01/2.)+(dchip1-0.015/2.))*TMath::Sin(252.*TMath::Pi()/180.);  // see definition of idrotm[245]  
+     gMC->Gspos("I10A",1,"I12A",1.4531+deltax,3.8152+deltay,0.0,idrotm[245],"ONLY");
+     deltax=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Cos(40.*TMath::Pi()/180.);  // see definition of idrotm[246]
+         deltay=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Sin(40.*TMath::Pi()/180.);  // see definition of idrotm[246]  
+     gMC->Gspos("I20A",1,"I12A",3.0174+deltax,6.5143+deltay,0.0,idrotm[246],"ONLY");
+     deltax=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Cos(49.*TMath::Pi()/180.);  // see definition of idrotm[247]
+         deltay=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Sin(49.*TMath::Pi()/180.);  // see definition of idrotm[247] 
+     gMC->Gspos("I20A",2,"I12A",1.9612+deltax,6.9062+deltay,0.0,idrotm[247],"ONLY");
+     deltax=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Cos(58.*TMath::Pi()/180.);  // see definition of idrotm[248]
+         deltay=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Sin(58.*TMath::Pi()/180.);  // see definition of idrotm[248] 
+     gMC->Gspos("I20A",3,"I12A",0.8567+deltax,7.1279+deltay,0.0,idrotm[248],"ONLY");
+     deltax=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Cos(67.*TMath::Pi()/180.);  // see definition of idrotm[249]
+         deltay=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Sin(67.*TMath::Pi()/180.);  // see definition of idrotm[249] 
+     gMC->Gspos("I20A",4,"I12A",-0.2689+deltax,7.1742+deltay,0.0,idrotm[249],"ONLY");
+     gMC->Gspos("I123",2,"I12A",-0.2978,5.5196,0.0,idrotm[214],"ONLY");
+     gMC->Gspos("I121",2,"I12A",-0.2385,4.1518,0.0,idrotm[213],"ONLY");
+     gMC->Gspos("I122",2,"I12A",-0.2968,4.0207,0.0,idrotm[212],"ONLY");
+     gMC->Gspos("I120",2,"I12A",-0.3672,3.9056,0.0,0,"ONLY");
+     gMC->Gspos("I144",1,"I12A",-0.2538,3.8556,0.0,0,"ONLY");
+     gMC->Gspos("I113",3,"I12A",0.1095,3.9056,0.0,0,"ONLY");
+     gMC->Gspos("I143",1,"I12A",0.4365,3.8556,0.0,idrotm[236],"ONLY");
+     gMC->Gspos("I142",1,"I12A",0.5136,3.9056,0.0,idrotm[235],"ONLY");
+     gMC->Gspos("I141",1,"I12A",0.5636,3.9752,0.0,idrotm[201],"ONLY");
+     gMC->Gspos("I140",1,"I12A",0.6336,4.0447,0.0,idrotm[234],"ONLY");
+     gMC->Gspos("I139",1,"I12A",0.8297,4.0545,0.0,idrotm[207],"ONLY");
+     gMC->Gspos("I113",5,"I12A",1.2575,3.9681,0.0,idrotm[207],"ONLY");
+     gMC->Gspos("I138",1,"I12A",1.66,3.7848,0.0,idrotm[207],"ONLY");
+     gMC->Gspos("I137",1,"I12A",1.8556,3.7738,0.0,idrotm[233],"ONLY");
+     gMC->Gspos("I136",1,"I12A",2.6224,4.874,0.0,idrotm[232],"ONLY");
+     gMC->Gspos("I135",1,"I12A",3.2967,6.0337,0.0,idrotm[231],"ONLY");
+     gMC->Gspos("I134",1,"I12A",3.266,6.1636,0.0,idrotm[230],"ONLY");
+     gMC->Gspos("I113",1,"I12A",2.9903,6.4144,0.0,idrotm[211],"ONLY");
+     gMC->Gspos("I133",3,"I12A",2.7631,6.7627,0.0,idrotm[230],"ONLY");
+     gMC->Gspos("I132",3,"I12A",2.62,6.8555,0.0,idrotm[229],"ONLY");
+     gMC->Gspos("I131",3,"I12A",2.648,6.6023,0.0,idrotm[228],"ONLY");
+     gMC->Gspos("I130",3,"I12A",2.6569,6.3431,0.0,idrotm[227],"ONLY");
+     gMC->Gspos("I129",3,"I12A",2.3906,6.4819,0.0,idrotm[226],"ONLY");
+     gMC->Gspos("I113",2,"I12A",1.9488,6.7998,0.0,idrotm[210],"ONLY");
+     gMC->Gspos("I133",2,"I12A",1.6699,7.1085,0.0,idrotm[226],"ONLY");
+     gMC->Gspos("I132",2,"I12A",1.5142,7.1777,0.0,idrotm[225],"ONLY");
+     gMC->Gspos("I131",2,"I12A",1.5814,6.932,0.0,idrotm[224],"ONLY");
+     gMC->Gspos("I130",2,"I12A",1.6308,6.6774,0.0,idrotm[223],"ONLY");
+     gMC->Gspos("I129",2,"I12A",1.346,6.7728,0.0,idrotm[222],"ONLY");
+     gMC->Gspos("I113",6,"I12A",0.8599,7.0176,0.0,idrotm[209],"ONLY");
+     gMC->Gspos("I133",1,"I12A",0.5362,7.2789,0.0,idrotm[222],"ONLY");
+     gMC->Gspos("I132",1,"I12A",0.3715,7.3228,0.0,idrotm[221],"ONLY");
+     gMC->Gspos("I131",1,"I12A",0.4763,7.0907,0.0,idrotm[220],"ONLY");
+     gMC->Gspos("I130",1,"I12A",0.5649,6.8469,0.0,idrotm[219],"ONLY");
+     gMC->Gspos("I129",1,"I12A",0.2688,6.8966,0.0,idrotm[218],"ONLY");
+     gMC->Gspos("I113",4,"I12A",-0.2497,7.0624,0.0,idrotm[208],"ONLY");
+     gMC->Gspos("I128",1,"I12A",-0.6103,7.2698,0.0,idrotm[218],"ONLY");
+     gMC->Gspos("I126",2,"I12A",-0.7799,7.2874,0.0,idrotm[217],"ONLY");
+     gMC->Gspos("I125",2,"I12A",-0.6315,7.0883,0.0,idrotm[216],"ONLY");
+     gMC->Gspos("I124",2,"I12A",-0.4965,6.8742,0.0,idrotm[215],"ONLY");
+     gMC->Gspos("I103",3,"I10A",-0.05,-di10a[1]+2.*di104[1]+di103[1],-3.536,0,"ONLY");
+     gMC->Gspos("I103",4,"I10A",-0.05,-di10a[1]+2.*di104[1]+di103[1],-10.708,0,"ONLY");
+     gMC->Gspos("I103",1,"I10A",-0.05,-di10a[1]+2.*di104[1]+di103[1],10.708,0,"ONLY");
+     gMC->Gspos("I103",2,"I10A",-0.05,-di10a[1]+2.*di104[1]+di103[1],3.536,0,"ONLY");
+     gMC->Gspos("I105",1,"I10A",-0.05,0.01,-16.844,idrotm[237],"ONLY");
+     gMC->Gspos("I105",2,"I10A",-0.05,0.01,16.844,0,"ONLY");
+     gMC->Gspos("I104",1,"I10A",0.0,-di10a[1]+di104[1],0.0,0,"ONLY");
+     gMC->Gspos("I1D3",3,"I20A",-0.05,-di20a[1]+2.*di104[1]+di1d3[1],-3.536,0,"ONLY");
+     gMC->Gspos("I1D3",4,"I20A",-0.05,-di20a[1]+2.*di104[1]+di1d3[1],-10.708,0,"ONLY");
+     gMC->Gspos("I1D3",1,"I20A",-0.05,-di20a[1]+2.*di104[1]+di1d3[1],10.708,0,"ONLY");
+     gMC->Gspos("I1D3",2,"I20A",-0.05,-di20a[1]+2.*di104[1]+di1d3[1],3.536,0,"ONLY");
+     gMC->Gspos("I105",3,"I20A",-0.05,0.01,-16.844,idrotm[237],"ONLY");
+     gMC->Gspos("I105",4,"I20A",-0.05,0.01,16.844,0,"ONLY");
+     gMC->Gspos("I104",2,"I20A",0.0,-di20a[1]+di104[1],0.0,0,"ONLY");
+     gMC->Gspos("I112",2,"I113",0.25,0.02,0.0,idrotm[206],"ONLY");
+     gMC->Gspos("I111",2,"I113",0.1318,-0.0008,0.0,idrotm[205],"ONLY");
+     gMC->Gspos("I118",1,"I113",0.0,-0.0454,0.0,0,"ONLY");
+     gMC->Gspos("I110",1,"I113",0.0,0.0492,0.0,0,"ONLY");
+     gMC->Gspos("I114",1,"I113",0.063,0.0042,0.0,idrotm[202],"ONLY");
+     gMC->Gspos("I115",1,"I113",0.063,0.0042,0.0,idrotm[202],"ONLY");
+     gMC->Gspos("I115",2,"I113",-0.063,0.0042,0.0,idrotm[201],"ONLY");
+     gMC->Gspos("I114",2,"I113",-0.063,0.0042,0.0,idrotm[201],"ONLY");
+     gMC->Gspos("I116",1,"I113",0.0,0.0042,0.0,0,"ONLY");
+     gMC->Gspos("I111",1,"I113",-0.1318,-0.0008,0.0,idrotm[204],"ONLY");
+     gMC->Gspos("I112",1,"I113",-0.25,0.02,0.0,idrotm[203],"ONLY");
+     gMC->Gspos("I101",1,"I103",-0.088,ddet1,0.0,0,"ONLY");
+     gMC->Gspos("I102",1,"I103",0.0,-dchip1,-2.8,0,"ONLY");
+     gMC->Gspos("I102",2,"I103",0.0,-dchip1,-1.4,0,"ONLY");
+     gMC->Gspos("I102",3,"I103",0.0,-dchip1,0.0,0,"ONLY");
+     gMC->Gspos("I102",4,"I103",0.0,-dchip1,1.4,0,"ONLY");
+     gMC->Gspos("I102",5,"I103",0.0,-dchip1,2.8,0,"ONLY");
+     gMC->Gspos("I1D1",1,"I1D3",-0.088,ddet2,0.0,0,"ONLY");
+     gMC->Gspos("I1D2",1,"I1D3",0.0,-dchip2,-2.8,0,"ONLY");
+     gMC->Gspos("I1D2",2,"I1D3",0.0,-dchip2,-1.4,0,"ONLY");
+     gMC->Gspos("I1D2",3,"I1D3",0.0,-dchip2,0.0,0,"ONLY");
+     gMC->Gspos("I1D2",4,"I1D3",0.0,-dchip2,1.4,0,"ONLY");
+     gMC->Gspos("I1D2",5,"I1D3",0.0,-dchip2,2.8,0,"ONLY");
+     gMC->Gspos("I117",1,"I116",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("ITS1",1,"I101",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("ITS2",1,"I1D1",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("I650",16,"IT12",0.0,0.0,22.0,idrotm[1104],"MANY");
+     gMC->Gspos("I650",20,"IT12",0.0,0.0,22.0,idrotm[1130],"MANY");
+     gMC->Gspos("I650",18,"IT12",0.0,0.0,22.0,idrotm[1117],"MANY");
+     gMC->Gspos("I650",1,"IT12",0.0,0.0,22.0,0,"MANY");
+     gMC->Gspos("I650",4,"IT12",0.0,0.0,22.0,idrotm[1106],"MANY");
+     gMC->Gspos("I650",6,"IT12",0.0,0.0,22.0,idrotm[1039],"MANY");
+     gMC->Gspos("I650",8,"IT12",0.0,0.0,22.0,idrotm[1107],"MANY");
+     gMC->Gspos("I650",10,"IT12",0.0,0.0,22.0,idrotm[1065],"MANY");
+     gMC->Gspos("I650",12,"IT12",0.0,0.0,22.0,idrotm[1078],"MANY");
+     gMC->Gspos("I650",14,"IT12",0.0,0.0,22.0,idrotm[1091],"MANY");
+     gMC->Gspos("I650",19,"IT12",0.0,0.0,-22.0,idrotm[1108],"MANY");
+     gMC->Gspos("I650",2,"IT12",0.0,0.0,-22.0,idrotm[1109],"MANY");
+     gMC->Gspos("I650",3,"IT12",0.0,0.0,-22.0,idrotm[1110],"MANY");
+     gMC->Gspos("I650",5,"IT12",0.0,0.0,-22.0,idrotm[1111],"MANY");
+     gMC->Gspos("I650",7,"IT12",0.0,0.0,-22.0,idrotm[1112],"MANY");
+     gMC->Gspos("I650",9,"IT12",0.0,0.0,-22.0,idrotm[1113],"MANY");
+     gMC->Gspos("I650",11,"IT12",0.0,0.0,-22.0,idrotm[1114],"MANY");
+     gMC->Gspos("I650",13,"IT12",0.0,0.0,-22.0,idrotm[1115],"MANY");
+     gMC->Gspos("I650",15,"IT12",0.0,0.0,-22.0,idrotm[1116],"MANY");
+     gMC->Gspos("I650",17,"IT12",0.0,0.0,-22.0,idrotm[1118],"MANY");
+     gMC->Gspos("I666",1,"I650",0.0,0.0,0.25,idrotm[1003],"MANY");
+     gMC->Gspos("I667",1,"I650",0.1102,0.9945,0.45,idrotm[1088],"ONLY");
+     gMC->Gspos("I669",3,"I650",0.1883,4.0372,-3.2,0,"ONLY");
+     gMC->Gspos("I671",3,"I650",0.1883,4.0372,0.6,0,"ONLY");
+     gMC->Gspos("I669",2,"I650",1.3343,4.0609,-3.2,0,"ONLY");
+     gMC->Gspos("I671",2,"I650",1.3343,4.0609,0.6,0,"ONLY");
+     gMC->Gspos("I669",6,"I650",2.9567,6.1959,-3.2,idrotm[1089],"ONLY");
+     gMC->Gspos("I671",6,"I650",2.9567,6.1959,0.6,idrotm[1089],"ONLY");
+     gMC->Gspos("I669",5,"I650",1.9511,6.5822,-3.2,idrotm[1011],"ONLY");
+     gMC->Gspos("I671",5,"I650",1.9511,6.5822,0.6,idrotm[1011],"ONLY");
+     gMC->Gspos("I669",4,"I650",0.8974,6.8064,-3.2,idrotm[1090],"ONLY");
+     gMC->Gspos("I671",4,"I650",0.8974,6.8064,0.6,idrotm[1090],"ONLY");
+     gMC->Gspos("I669",1,"I650",-0.1784,6.863,-3.2,0,"ONLY");
+     gMC->Gspos("I671",1,"I650",-0.1784,6.863,0.6,0,"ONLY");
+     gMC->Gspos("I673",1,"I650",0.2173,4.8037,1.8,0,"ONLY");
+     gMC->Gspos("I673",6,"I650",1.5093,4.5605,1.8,0,"ONLY");
+     gMC->Gspos("I673",4,"I650",-0.173,6.2531,1.8,idrotm[1092],"ONLY");
+     gMC->Gspos("I673",3,"I650",0.8073,6.2032,1.8,idrotm[1093],"ONLY");
+     gMC->Gspos("I673",2,"I650",1.7678,6.0005,1.8,idrotm[1094],"ONLY");
+     gMC->Gspos("I673",5,"I650",2.6847,5.6501,1.8,0,"ONLY");
+     gMC->Gspos("I676",2,"I650",1.7618,5.2269,2.5,0,"ONLY");
+     gMC->Gspos("I676",1,"I650",0.4018,5.5869,2.5,0,"ONLY");
+     gMC->Gspos("I668",1,"I667",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("I670",1,"I669",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("I672",1,"I671",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("I674",1,"I673",0.0,0.0,0.0,0,"MANY");
+     gMC->Gspos("I675",1,"I673",0.0,0.0,-0.5,0,"ONLY");
+     gMC->Gspos("I677",1,"I676",0.0,0.0,0.0,0,"MANY");
+     gMC->Gspos("I678",1,"I676",0.0,0.0,-0.95,0,"ONLY");    
+
+  }
+
+
+  // --- Place SPD (option 'b') volumes into their mother volume IT12
+  
+  // SPD - option 'b' 
+  // (this is the default)
+
+  if (option == 2) {
+
+     gMC->Gspos("I12B",1,"IT12",0.0,0.0,0.0,0,"MANY");
+     gMC->Gspos("I12B",8,"IT12",0.0,0.0,0.0,idrotm[233],"MANY");
+     gMC->Gspos("I12B",7,"IT12",0.0,0.0,0.0,idrotm[244],"MANY");
+     gMC->Gspos("I12B",6,"IT12",0.0,0.0,0.0,idrotm[236],"MANY");
+     gMC->Gspos("I12B",2,"IT12",0.0,0.0,0.0,idrotm[245],"MANY");
+     gMC->Gspos("I12B",3,"IT12",0.0,0.0,0.0,idrotm[234],"MANY");
+     gMC->Gspos("I12B",4,"IT12",0.0,0.0,0.0,idrotm[246],"MANY");
+     gMC->Gspos("I12B",5,"IT12",0.0,0.0,0.0,idrotm[247],"MANY");
+     gMC->Gspos("I12B",9,"IT12",0.0,0.0,0.0,idrotm[248],"MANY");
+     gMC->Gspos("I12B",10,"IT12",0.0,0.0,0.0,idrotm[249],"MANY");
+     deltax=((ddet1-0.01/2.)+(dchip1-0.015/2.))*TMath::Cos(270.*TMath::Pi()/180.);  // see definition of idrotm[238]
+         deltay=((ddet1-0.01/2.)+(dchip1-0.015/2.))*TMath::Sin(270.*TMath::Pi()/180.);  // see definition of idrotm[238]
+     gMC->Gspos("I10B",2,"I12B",0.203+deltax,3.8206+deltay,0.0,idrotm[238],"ONLY");      
+     deltax=((ddet1-0.01/2.)+(dchip1-0.015/2.))*TMath::Cos(252.*TMath::Pi()/180.);  // see definition of idrotm[239]
+         deltay=((ddet1-0.01/2.)+(dchip1-0.015/2.))*TMath::Sin(252.*TMath::Pi()/180.);  // see definition of idrotm[239]  
+     gMC->Gspos("I10B",1,"I12B",1.4531+deltax,3.8152+deltay,0.0,idrotm[239],"ONLY");
+     deltax=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Cos(40.*TMath::Pi()/180.);  // see definition of idrotm[240]
+         deltay=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Sin(40.*TMath::Pi()/180.);  // see definition of idrotm[240]  
+     gMC->Gspos("I20B",1,"I12B",3.0174+deltax,6.5143+deltay,0.0,idrotm[240],"ONLY");
+     deltax=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Cos(49.*TMath::Pi()/180.);  // see definition of idrotm[241]
+         deltay=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Sin(49.*TMath::Pi()/180.);  // see definition of idrotm[241] 
+     gMC->Gspos("I20B",2,"I12B",1.9612+deltax,6.9062+deltay,0.0,idrotm[241],"ONLY");
+     deltax=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Cos(58.*TMath::Pi()/180.);  // see definition of idrotm[242]
+         deltay=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Sin(58.*TMath::Pi()/180.);  // see definition of idrotm[242] 
+     gMC->Gspos("I20B",3,"I12B",0.8567+deltax,7.1279+deltay,0.0,idrotm[242],"ONLY");
+     deltax=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Cos(67.*TMath::Pi()/180.);  // see definition of idrotm[243]
+         deltay=((ddet2-0.01/2.)+(dchip2-0.015/2.))*TMath::Sin(67.*TMath::Pi()/180.);  // see definition of idrotm[243] 
+     gMC->Gspos("I20B",4,"I12B",-0.2689+deltax,7.1742+deltay,0.0,idrotm[243],"ONLY");
+     gMC->Gspos("I123",1,"I12B",-0.2978,5.5196,0.0,idrotm[214],"ONLY");
+     gMC->Gspos("I121",1,"I12B",-0.2385,4.1518,0.0,idrotm[213],"ONLY");
+     gMC->Gspos("I122",1,"I12B",-0.2968,4.0207,0.0,idrotm[212],"ONLY");
+     gMC->Gspos("I120",1,"I12B",-0.3672,3.9056,0.0,0,"ONLY");
+     gMC->Gspos("I144",1,"I12B",-0.2538,3.8556,0.0,0,"ONLY");
+     gMC->Gspos("I113",3,"I12B",0.1095,3.9056,0.0,0,"ONLY");
+     gMC->Gspos("I143",1,"I12B",0.4365,3.8556,0.0,idrotm[236],"ONLY");
+     gMC->Gspos("I142",1,"I12B",0.5136,3.9056,0.0,idrotm[235],"ONLY");
+     gMC->Gspos("I141",1,"I12B",0.5636,3.9752,0.0,idrotm[237],"ONLY");
+     gMC->Gspos("I140",1,"I12B",0.6336,4.0447,0.0,idrotm[234],"ONLY");
+     gMC->Gspos("I139",1,"I12B",0.8297,4.0545,0.0,idrotm[207],"ONLY");
+     gMC->Gspos("I113",5,"I12B",1.2575,3.9681,0.0,idrotm[207],"ONLY");
+     gMC->Gspos("I138",1,"I12B",1.66,3.7848,0.0,idrotm[207],"ONLY");
+     gMC->Gspos("I137",1,"I12B",1.8556,3.7738,0.0,idrotm[233],"ONLY");
+     gMC->Gspos("I136",1,"I12B",2.6224,4.874,0.0,idrotm[232],"ONLY");
+     gMC->Gspos("I135",1,"I12B",3.2967,6.0337,0.0,idrotm[231],"ONLY");
+     gMC->Gspos("I134",1,"I12B",3.266,6.1636,0.0,idrotm[230],"ONLY");
+     gMC->Gspos("I113",1,"I12B",2.9903,6.4144,0.0,idrotm[211],"ONLY");
+     gMC->Gspos("I133",3,"I12B",2.7631,6.7627,0.0,idrotm[230],"ONLY");
+     gMC->Gspos("I132",3,"I12B",2.62,6.8555,0.0,idrotm[229],"ONLY");
+     gMC->Gspos("I131",3,"I12B",2.648,6.6023,0.0,idrotm[228],"ONLY");
+     gMC->Gspos("I130",3,"I12B",2.6569,6.3431,0.0,idrotm[227],"ONLY");
+     gMC->Gspos("I129",3,"I12B",2.3906,6.4819,0.0,idrotm[226],"ONLY");
+     gMC->Gspos("I113",2,"I12B",1.9488,6.7998,0.0,idrotm[210],"ONLY");
+     gMC->Gspos("I133",2,"I12B",1.6699,7.1085,0.0,idrotm[226],"ONLY");
+     gMC->Gspos("I132",2,"I12B",1.5142,7.1777,0.0,idrotm[225],"ONLY");
+     gMC->Gspos("I131",2,"I12B",1.5814,6.932,0.0,idrotm[224],"ONLY");
+     gMC->Gspos("I130",2,"I12B",1.6308,6.6774,0.0,idrotm[223],"ONLY");
+     gMC->Gspos("I129",2,"I12B",1.346,6.7728,0.0,idrotm[222],"ONLY");
+     gMC->Gspos("I113",6,"I12B",0.8599,7.0176,0.0,idrotm[209],"ONLY");
+     gMC->Gspos("I133",1,"I12B",0.5362,7.2789,0.0,idrotm[222],"ONLY");
+     gMC->Gspos("I132",1,"I12B",0.3715,7.3228,0.0,idrotm[221],"ONLY");
+     gMC->Gspos("I131",1,"I12B",0.4763,7.0907,0.0,idrotm[220],"ONLY");
+     gMC->Gspos("I130",1,"I12B",0.5649,6.8469,0.0,idrotm[219],"ONLY");
+     gMC->Gspos("I129",1,"I12B",0.2688,6.8966,0.0,idrotm[218],"ONLY");
+     gMC->Gspos("I113",4,"I12B",-0.2497,7.0624,0.0,idrotm[208],"ONLY");
+     gMC->Gspos("I128",1,"I12B",-0.6103,7.2698,0.0,idrotm[218],"ONLY");
+     gMC->Gspos("I126",1,"I12B",-0.7799,7.2874,0.0,idrotm[217],"ONLY");
+     gMC->Gspos("I125",1,"I12B",-0.6315,7.0883,0.0,idrotm[216],"ONLY");
+     gMC->Gspos("I124",1,"I12B",-0.4965,6.8742,0.0,idrotm[215],"ONLY");
+     gMC->Gspos("I105",3,"I10B",-0.05,-0.01,-16.844,idrotm[201],"ONLY");
+     gMC->Gspos("I105",4,"I10B",-0.05,-0.01,16.844,0,"ONLY");
+     gMC->Gspos("I107",2,"I10B",-0.0455,-di10b[1]+di107[1],3.536,0,"ONLY");
+     gMC->Gspos("I107",1,"I10B",-0.0455,-di10b[1]+di107[1],10.708,0,"ONLY");
+     gMC->Gspos("I107",4,"I10B",-0.0455,-di10b[1]+di107[1],-10.708,0,"ONLY");
+     gMC->Gspos("I107",3,"I10B",-0.0455,-di10b[1]+di107[1],-3.536,0,"ONLY");
+     gMC->Gspos("I109",1,"I10B",-0.138,0.015,-16.844,idrotm[201],"ONLY");
+     gMC->Gspos("I109",2,"I10B",-0.138,0.015,16.844,0,"ONLY");
+     gMC->Gspos("I108",1,"I10B",-0.138,-di10b[1]+2.*di107[1]+di108[1],0.0,0,"ONLY");
+     gMC->Gspos("I105",1,"I20B",-0.05,-0.01,-16.844,idrotm[201],"ONLY");
+     gMC->Gspos("I105",2,"I20B",-0.05,-0.01,16.844,0,"ONLY");
+     gMC->Gspos("I1D7",2,"I20B",-0.0455,-di20b[1]+di1d7[1],3.536,0,"ONLY");
+     gMC->Gspos("I1D7",1,"I20B",-0.0455,-di20b[1]+di1d7[1],10.708,0,"ONLY");
+     gMC->Gspos("I1D7",4,"I20B",-0.0455,-di20b[1]+di1d7[1],-10.708,idrotm[201],"ONLY");
+     gMC->Gspos("I1D7",3,"I20B",-0.0455,-di20b[1]+di1d7[1],-3.536,idrotm[201],"ONLY");
+     gMC->Gspos("I109",3,"I20B",-0.138,0.015,-16.844,idrotm[201],"ONLY");
+     gMC->Gspos("I109",4,"I20B",-0.138,0.015,16.844,0,"ONLY");
+     gMC->Gspos("I108",2,"I20B",-0.138,-di20b[1]+2.*di1d7[1]+di108[1],0.0,0,"ONLY");
+     gMC->Gspos("I112",2,"I113",0.25,0.02,0.0,idrotm[206],"ONLY");
+     gMC->Gspos("I111",2,"I113",0.1318,-0.0008,0.0,idrotm[205],"ONLY");
+     gMC->Gspos("I118",1,"I113",0.0,-0.0454,0.0,0,"ONLY");
+     gMC->Gspos("I110",1,"I113",0.0,0.0492,0.0,0,"ONLY");
+     gMC->Gspos("I114",1,"I113",0.063,0.0042,0.0,idrotm[202],"ONLY");
+     gMC->Gspos("I115",1,"I113",0.063,0.0042,0.0,idrotm[202],"ONLY");
+     gMC->Gspos("I115",2,"I113",-0.063,0.0042,0.0,idrotm[237],"ONLY");
+     gMC->Gspos("I114",2,"I113",-0.063,0.0042,0.0,idrotm[237],"ONLY");
+     gMC->Gspos("I116",1,"I113",0.0,0.0042,0.0,0,"ONLY");
+     gMC->Gspos("I111",1,"I113",-0.1318,-0.0008,0.0,idrotm[204],"ONLY");
+     gMC->Gspos("I112",1,"I113",-0.25,0.02,0.0,idrotm[203],"ONLY");
+     gMC->Gspos("I106",1,"I107",0.0,-dchip1,-1.4,0,"ONLY");
+     gMC->Gspos("I106",2,"I107",0.0,-dchip1,0.0,0,"ONLY");
+     gMC->Gspos("I106",3,"I107",0.0,-dchip1,1.4,0,"ONLY");
+     gMC->Gspos("I106",4,"I107",0.0,-dchip1,2.8,0,"ONLY");
+     gMC->Gspos("I106",5,"I107",0.0,-dchip1,-2.8,0,"ONLY");
+     gMC->Gspos("I101",1,"I107",0.0,ddet1,0.0,0,"ONLY");
+     gMC->Gspos("I1D6",1,"I1D7",0.0,-dchip2,-1.4,0,"ONLY");
+     gMC->Gspos("I1D6",2,"I1D7",0.0,-dchip2,0.0,0,"ONLY");
+     gMC->Gspos("I1D6",3,"I1D7",0.0,-dchip2,1.4,0,"ONLY");
+     gMC->Gspos("I1D6",4,"I1D7",0.0,-dchip2,2.8,0,"ONLY");
+     gMC->Gspos("I1D6",5,"I1D7",0.0,-dchip2,-2.8,0,"ONLY");
+     gMC->Gspos("I1D1",1,"I1D7",0.0,ddet2,0.0,0,"ONLY");
+     gMC->Gspos("I117",1,"I116",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("ITS1",1,"I101",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("ITS2",1,"I1D1",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("I650",16,"IT12",0.0,0.0,22.0,idrotm[1104],"MANY");
+     gMC->Gspos("I650",20,"IT12",0.0,0.0,22.0,idrotm[1130],"MANY");
+     gMC->Gspos("I650",18,"IT12",0.0,0.0,22.0,idrotm[1117],"MANY");
+     gMC->Gspos("I650",1,"IT12",0.0,0.0,22.0,0,"MANY");
+     gMC->Gspos("I650",4,"IT12",0.0,0.0,22.0,idrotm[1106],"MANY");
+     gMC->Gspos("I650",6,"IT12",0.0,0.0,22.0,idrotm[1039],"MANY");
+     gMC->Gspos("I650",8,"IT12",0.0,0.0,22.0,idrotm[1107],"MANY");
+     gMC->Gspos("I650",10,"IT12",0.0,0.0,22.0,idrotm[1065],"MANY");
+     gMC->Gspos("I650",12,"IT12",0.0,0.0,22.0,idrotm[1078],"MANY");
+     gMC->Gspos("I650",14,"IT12",0.0,0.0,22.0,idrotm[1091],"MANY");
+     gMC->Gspos("I650",19,"IT12",0.0,0.0,-22.0,idrotm[1108],"MANY");
+     gMC->Gspos("I650",2,"IT12",0.0,0.0,-22.0,idrotm[1109],"MANY");
+     gMC->Gspos("I650",3,"IT12",0.0,0.0,-22.0,idrotm[1110],"MANY");
+     gMC->Gspos("I650",5,"IT12",0.0,0.0,-22.0,idrotm[1111],"MANY");
+     gMC->Gspos("I650",7,"IT12",0.0,0.0,-22.0,idrotm[1112],"MANY");
+     gMC->Gspos("I650",9,"IT12",0.0,0.0,-22.0,idrotm[1113],"MANY");
+     gMC->Gspos("I650",11,"IT12",0.0,0.0,-22.0,idrotm[1114],"MANY");
+     gMC->Gspos("I650",13,"IT12",0.0,0.0,-22.0,idrotm[1115],"MANY");
+     gMC->Gspos("I650",15,"IT12",0.0,0.0,-22.0,idrotm[1116],"MANY");
+     gMC->Gspos("I650",17,"IT12",0.0,0.0,-22.0,idrotm[1118],"MANY");
+     gMC->Gspos("I666",1,"I650",0.0,0.0,0.25,idrotm[1003],"MANY");
+     gMC->Gspos("I667",1,"I650",0.1102,0.9945,0.45,idrotm[1088],"ONLY");
+     gMC->Gspos("I669",3,"I650",0.1883,4.0372,-3.2,0,"ONLY");
+     gMC->Gspos("I671",3,"I650",0.1883,4.0372,0.6,0,"ONLY");
+     gMC->Gspos("I669",2,"I650",1.3343,4.0609,-3.2,0,"ONLY");
+     gMC->Gspos("I671",2,"I650",1.3343,4.0609,0.6,0,"ONLY");
+     gMC->Gspos("I669",6,"I650",2.9567,6.1959,-3.2,idrotm[1089],"ONLY");
+     gMC->Gspos("I671",6,"I650",2.9567,6.1959,0.6,idrotm[1089],"ONLY");
+     gMC->Gspos("I669",5,"I650",1.9511,6.5822,-3.2,idrotm[1011],"ONLY");
+     gMC->Gspos("I671",5,"I650",1.9511,6.5822,0.6,idrotm[1011],"ONLY");
+     gMC->Gspos("I669",4,"I650",0.8974,6.8064,-3.2,idrotm[1090],"ONLY");
+     gMC->Gspos("I671",4,"I650",0.8974,6.8064,0.6,idrotm[1090],"ONLY");
+     gMC->Gspos("I669",1,"I650",-0.1784,6.863,-3.2,0,"ONLY");
+     gMC->Gspos("I671",1,"I650",-0.1784,6.863,0.6,0,"ONLY");
+     gMC->Gspos("I673",1,"I650",0.2173,4.8037,1.8,0,"ONLY");
+     gMC->Gspos("I673",6,"I650",1.5093,4.5605,1.8,0,"ONLY");
+     gMC->Gspos("I673",4,"I650",-0.173,6.2531,1.8,idrotm[1092],"ONLY");
+     gMC->Gspos("I673",3,"I650",0.8073,6.2032,1.8,idrotm[1093],"ONLY");
+     gMC->Gspos("I673",2,"I650",1.7678,6.0005,1.8,idrotm[1094],"ONLY");
+     gMC->Gspos("I673",5,"I650",2.6847,5.6501,1.8,0,"ONLY");
+     gMC->Gspos("I676",2,"I650",1.7618,5.2269,2.5,0,"ONLY");
+     gMC->Gspos("I676",1,"I650",0.4018,5.5869,2.5,0,"ONLY");
+     gMC->Gspos("I668",1,"I667",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("I670",1,"I669",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("I672",1,"I671",0.0,0.0,0.0,0,"ONLY");
+     gMC->Gspos("I674",1,"I673",0.0,0.0,0.0,0,"MANY");
+     gMC->Gspos("I675",1,"I673",0.0,0.0,-0.5,0,"ONLY");
+     gMC->Gspos("I677",1,"I676",0.0,0.0,0.0,0,"MANY");
+     gMC->Gspos("I678",1,"I676",0.0,0.0,-0.95,0,"ONLY");  
+
+  }
     
   // --- Place SDD volumes into their mother volume IT34
+
   
-  gMC->Gspos("I048",8,"IT34",-22.1376,-14.227,0.0,idrotm[328],"ONLY");
-  gMC->Gspos("I048",7,"IT34",-24.7213,-7.2588,0.0,idrotm[329],"ONLY");
-  gMC->Gspos("I048",6,"IT34",-26.315,0.0,0.0,idrotm[350],"ONLY");
-  gMC->Gspos("I048",5,"IT34",-24.7213,7.2588,0.0,idrotm[330],"ONLY");
-  gMC->Gspos("I048",4,"IT34",-22.1376,14.227,0.0,idrotm[366],"ONLY");
-  gMC->Gspos("I048",3,"IT34",-16.8725,19.4719,0.0,idrotm[331],"ONLY");
-  gMC->Gspos("I048",2,"IT34",-10.9317,23.937,0.0,idrotm[332],"ONLY");
-  gMC->Gspos("I048",1,"IT34",-3.6667,25.5027,0.0,idrotm[335],"ONLY");
-  gMC->Gspos("I048",22,"IT34",3.745,26.0472,0.0,idrotm[334],"ONLY");
-  gMC->Gspos("I048",21,"IT34",10.7032,23.4367,0.0,idrotm[314],"ONLY");
-  gMC->Gspos("I048",20,"IT34",17.2327,19.8876,0.0,idrotm[315],"ONLY");
-  gMC->Gspos("I048",19,"IT34",21.6749,13.9296,0.0,idrotm[316],"ONLY");
-  gMC->Gspos("I048",18,"IT34",25.2491,7.4138,0.0,idrotm[317],"ONLY");
-  gMC->Gspos("I048",17,"IT34",25.765,0.0,0.0,idrotm[318],"ONLY");
-  gMC->Gspos("I048",16,"IT34",25.2491,-7.4138,0.0,idrotm[319],"ONLY");
-  gMC->Gspos("I048",15,"IT34",21.6749,-13.9296,0.0,idrotm[320],"ONLY");
-  gMC->Gspos("I048",14,"IT34",17.2327,-19.8876,0.0,idrotm[322],"ONLY");
-  gMC->Gspos("I048",13,"IT34",10.7032,-23.4367,0.0,idrotm[323],"ONLY");
-  gMC->Gspos("I048",12,"IT34",3.745,-26.0472,0.0,idrotm[324],"ONLY");
-  gMC->Gspos("I048",11,"IT34",-3.6667,-25.5027,0.0,idrotm[325],"ONLY");
-  gMC->Gspos("I048",10,"IT34",-10.9316,-23.937,0.0,idrotm[326],"ONLY");
-  gMC->Gspos("I048",9,"IT34",-16.8725,-19.4719,0.0,idrotm[327],"ONLY");
-  gMC->Gspos("I005",9,"IT34",-15.4744,-17.8584,-0.15,idrotm[327],"ONLY");
-  gMC->Gspos("I005",8,"IT34",-20.3415,-13.0727,-0.15,idrotm[328],"ONLY");
-  gMC->Gspos("I005",7,"IT34",-22.6728,-6.6573,-0.15,idrotm[329],"ONLY");
-  gMC->Gspos("I005",6,"IT34",-24.18,0.0,-0.15,idrotm[350],"ONLY");
-  gMC->Gspos("I005",5,"IT34",-22.6728,6.6573,-0.15,idrotm[330],"ONLY");
-  gMC->Gspos("I005",4,"IT34",-20.3415,13.0727,-0.15,idrotm[366],"ONLY");
-  gMC->Gspos("I005",3,"IT34",-15.4744,17.8584,-0.15,idrotm[331],"ONLY");
-  gMC->Gspos("I005",2,"IT34",-10.0447,21.9949,-0.15,idrotm[332],"ONLY");
-  gMC->Gspos("I005",1,"IT34",-3.3629,23.3895,-0.15,idrotm[335],"ONLY");
-  gMC->Gspos("I005",22,"IT34",3.4412,23.9339,-0.15,idrotm[334],"ONLY");
-  gMC->Gspos("I005",21,"IT34",9.8163,21.4946,-0.15,idrotm[314],"ONLY");
-  gMC->Gspos("I005",20,"IT34",15.8345,18.274,-0.15,idrotm[315],"ONLY");
-  gMC->Gspos("I005",19,"IT34",19.8788,12.7753,-0.15,idrotm[316],"ONLY");
-  gMC->Gspos("I005",18,"IT34",23.2005,6.8123,-0.15,idrotm[317],"ONLY");
-  gMC->Gspos("I005",17,"IT34",23.63,0.0,-0.15,idrotm[318],"ONLY");
-  gMC->Gspos("I005",16,"IT34",23.2005,-6.8123,-0.15,idrotm[319],"ONLY");
-  gMC->Gspos("I005",15,"IT34",19.8788,-12.7753,-0.15,idrotm[320],"ONLY");
-  gMC->Gspos("I005",14,"IT34",15.8345,-18.274,-0.15,idrotm[322],"ONLY");
-  gMC->Gspos("I005",13,"IT34",9.8163,-21.4946,-0.15,idrotm[323],"ONLY");
-  gMC->Gspos("I005",12,"IT34",3.4412,-23.9339,-0.15,idrotm[324],"ONLY");
-  gMC->Gspos("I005",11,"IT34",-3.3629,-23.3895,-0.15,idrotm[325],"ONLY");
-  gMC->Gspos("I005",10,"IT34",-10.0447,-21.9949,-0.15,idrotm[326],"ONLY");
-  gMC->Gspos("I047",6,"IT34",-10.8893,-13.6547,0.0,idrotm[311],"ONLY");
-  gMC->Gspos("I047",5,"IT34",-15.1948,-7.3174,0.0,idrotm[313],"ONLY");
-  gMC->Gspos("I047",4,"IT34",-17.465,0.0,0.0,idrotm[350],"ONLY");
-  gMC->Gspos("I047",3,"IT34",-15.1948,7.3175,0.0,idrotm[336],"ONLY");
-  gMC->Gspos("I047",2,"IT34",-10.8892,13.6547,0.0,idrotm[333],"ONLY");
-  gMC->Gspos("I047",1,"IT34",-3.7528,16.4422,0.0,idrotm[321],"ONLY");
-  gMC->Gspos("I047",14,"IT34",3.8863,17.0271,0.0,idrotm[305],"ONLY");
-  gMC->Gspos("I047",13,"IT34",10.5152,13.1856,0.0,idrotm[306],"ONLY");
-  gMC->Gspos("I047",12,"IT34",15.7354,7.5778,0.0,idrotm[307],"ONLY");
-  gMC->Gspos("I047",11,"IT34",16.865,0.0,0.0,idrotm[356],"ONLY");
-  gMC->Gspos("I047",10,"IT34",15.7354,-7.5778,0.0,idrotm[308],"ONLY");
-  gMC->Gspos("I047",9,"IT34",10.5152,-13.1856,0.0,idrotm[309],"ONLY");
-  gMC->Gspos("I047",8,"IT34",3.8863,-17.0271,0.0,idrotm[386],"ONLY");
-  gMC->Gspos("I047",7,"IT34",-3.7528,-16.4422,0.0,idrotm[310],"ONLY");
-  gMC->Gspos("I004",6,"IT34",-9.5581,-11.9855,0.0,idrotm[311],"ONLY");
-  gMC->Gspos("I004",5,"IT34",-13.2713,-6.3911,0.0,idrotm[313],"ONLY");
-  gMC->Gspos("I004",4,"IT34",-15.33,0.0,0.0,idrotm[350],"ONLY");
-  gMC->Gspos("I004",3,"IT34",-13.2713,6.3911,0.0,idrotm[336],"ONLY");
-  gMC->Gspos("I004",2,"IT34",-9.5581,11.9855,0.0,idrotm[333],"ONLY");
-  gMC->Gspos("I004",1,"IT34",-3.2777,14.3607,0.0,idrotm[321],"ONLY");
-  gMC->Gspos("I004",14,"IT34",3.4113,14.9456,0.0,idrotm[305],"ONLY");
-  gMC->Gspos("I004",13,"IT34",9.184,11.5164,0.0,idrotm[306],"ONLY");
-  gMC->Gspos("I004",12,"IT34",13.8119,6.6514,0.0,idrotm[307],"ONLY");
-  gMC->Gspos("I004",11,"IT34",14.73,0.0,0.0,idrotm[356],"ONLY");
-  gMC->Gspos("I004",10,"IT34",13.8119,-6.6514,0.0,idrotm[308],"ONLY");
-  gMC->Gspos("I004",9,"IT34",9.184,-11.5164,0.0,idrotm[309],"ONLY");
-  gMC->Gspos("I004",8,"IT34",3.4112,-14.9456,0.0,idrotm[386],"ONLY");
-  gMC->Gspos("I004",7,"IT34",-3.2777,-14.3607,0.0,idrotm[310],"ONLY");
-  gMC->Gspos("I024",3,"I048",-0.0001,0.0,31.925,0,"ONLY");
-  gMC->Gspos("I024",4,"I048",-0.0001,0.0,-31.925,idrotm[355],"ONLY");
-  gMC->Gspos("I018",13,"I048",-0.0001,0.0,-25.55,0,"ONLY");
-  gMC->Gspos("I018",12,"I048",-0.0001,0.0,-18.25,0,"ONLY");
-  gMC->Gspos("I018",11,"I048",-0.0001,0.0,-10.95,0,"ONLY");
-  gMC->Gspos("I018",10,"I048",-0.0001,0.0,25.55,0,"ONLY");
-  gMC->Gspos("I018",9,"I048",-0.0001,0.0,18.25,0,"ONLY");
-  gMC->Gspos("I018",8,"I048",-0.0001,0.0,10.95,0,"ONLY");
-  gMC->Gspos("I018",7,"I048",-0.0001,0.0,3.65,0,"ONLY");
-  gMC->Gspos("I018",6,"I048",-0.0001,0.0,3.65,0,"ONLY");
-  gMC->Gspos("I402",5,"I005",0.0,-0.115,-3.55,0,"ONLY");
-  gMC->Gspos("I402",4,"I005",0.0,0.115,3.85,0,"ONLY");
-  gMC->Gspos("I402",2,"I005",0.0,0.115,18.75,0,"ONLY");
-  gMC->Gspos("I402",3,"I005",0.0,-0.115,11.15,0,"ONLY");
-  gMC->Gspos("I402",1,"I005",0.0,-0.115,25.9,0,"ONLY");
-  gMC->Gspos("I402",6,"I005",0.0,0.115,-11.05,0,"ONLY");
-  gMC->Gspos("I402",7,"I005",0.0,-0.115,-18.3,0,"ONLY");
-  gMC->Gspos("I402",8,"I005",0.0,0.115,-25.9,0,"ONLY");
-  gMC->Gspos("I024",1,"I047",0.0,0.0,20.975,0,"ONLY");
-  gMC->Gspos("I018",4,"I047",0.0,0.0,7.3,0,"ONLY");
-  gMC->Gspos("I018",5,"I047",0.0,0.0,14.6,0,"ONLY");
-  gMC->Gspos("I018",1,"I047",0.0,0.0,0.0,0,"ONLY");
-  gMC->Gspos("I018",3,"I047",0.0,0.0,-14.6,0,"ONLY");
-  gMC->Gspos("I018",2,"I047",0.0,0.0,-7.3,0,"ONLY");
-  gMC->Gspos("I024",2,"I047",0.0,0.0,-20.975,idrotm[355],"ONLY");
-  gMC->Gspos("I302",4,"I004",0.0,-0.115,-3.7,0,"ONLY");
-  gMC->Gspos("I302",3,"I004",0.0,0.115,3.7,0,"ONLY");
-  gMC->Gspos("I302",6,"I004",0.0,-0.115,-18.35,0,"ONLY");
-  gMC->Gspos("I302",5,"I004",0.0,0.115,-11.2,0,"ONLY");
-  gMC->Gspos("I302",2,"I004",0.0,-0.115,10.95,0,"ONLY");
-  gMC->Gspos("I302",1,"I004",0.0,0.115,18.55,0,"ONLY");
-  gMC->Gspos("I025",2,"I024",1.987,-1.5842,0.0,idrotm[343],"ONLY");
-  gMC->Gspos("I026",2,"I024",1.8824,-1.7349,0.0,idrotm[344],"ONLY");
-  gMC->Gspos("I025",1,"I024",-1.9,-1.7349,0.0,idrotm[344],"ONLY");
-  gMC->Gspos("I026",1,"I024",-1.9782,-1.5689,0.0,idrotm[342],"ONLY");
-  gMC->Gspos("I026",3,"I024",0.0958,1.6914,0.0,idrotm[343],"ONLY");
-  gMC->Gspos("I025",3,"I024",-0.087,1.7067,0.0,idrotm[342],"ONLY");
-  gMC->Gspos("I021",10,"I024",1.0761,0.0836,1.7742,idrotm[337],"ONLY");
-  gMC->Gspos("I021",9,"I024",-1.0761,0.0836,1.7742,idrotm[339],"ONLY");
-  gMC->Gspos("I021",12,"I024",1.0761,0.0836,-0.1242,idrotm[340],"ONLY");
-  gMC->Gspos("I021",11,"I024",-1.0761,0.0836,-0.1242,idrotm[338],"ONLY");
-  gMC->Gspos("I021",13,"I024",-1.0761,0.0836,-1.8758,idrotm[339],"ONLY");
-  gMC->Gspos("I021",14,"I024",1.0761,0.0836,-1.8758,idrotm[337],"ONLY");
-  gMC->Gspos("I023",3,"I024",0.0,-1.7899,-1.0,idrotm[341],"ONLY");
-  gMC->Gspos("I022",3,"I024",0.0,-1.7899,0.825,idrotm[312],"ONLY");
-  gMC->Gspos("I028",1,"I024",0.0,-1.7999,1.875,0,"MANY");
-  gMC->Gspos("I029",1,"I024",0.0,-0.9999,2.65,0,"ONLY");
-  gMC->Gspos("I030",1,"I024",0.0,0.6001,2.65,idrotm[344],"ONLY");
-  gMC->Gspos("I027",1,"I024",0.0,0.0001,1.9965,idrotm[352],"ONLY");
-  gMC->Gspos("I032",1,"I024",1.7,-0.4999,0.0,0,"ONLY");
-  gMC->Gspos("I031",1,"I024",1.7,-0.4999,0.0,0,"ONLY");
-  gMC->Gspos("I031",2,"I024",-1.7,-0.4999,0.0,0,"ONLY");
-  gMC->Gspos("I032",2,"I024",-1.7,-0.4999,0.0,0,"ONLY");
-  gMC->Gspos("I046",6,"I024",-0.616,1.1702,0.0,idrotm[353],"ONLY");
-  gMC->Gspos("I046",5,"I024",-0.566,1.1702,0.0,idrotm[353],"ONLY");
-  gMC->Gspos("I046",4,"I024",0.616,1.1702,0.0,idrotm[354],"ONLY");
-  gMC->Gspos("I046",3,"I024",0.566,1.1702,0.0,idrotm[354],"ONLY");
-  gMC->Gspos("I046",2,"I024",0.516,1.1702,0.0,idrotm[354],"ONLY");
-  gMC->Gspos("I046",1,"I024",-0.516,1.1702,0.0,idrotm[353],"ONLY");
-  gMC->Gspos("I022",2,"I018",0.0,-1.79,-0.1,idrotm[312],"ONLY");
-  gMC->Gspos("I021",8,"I018",1.0761,0.0835,0.8492,idrotm[337],"ONLY");
-  gMC->Gspos("I021",7,"I018",-1.0761,0.0835,2.6008,idrotm[338],"ONLY");
-  gMC->Gspos("I021",6,"I018",-1.0761,0.0835,0.8492,idrotm[339],"ONLY");
-  gMC->Gspos("I021",5,"I018",1.0761,0.0835,-1.0492,idrotm[340],"ONLY");
-  gMC->Gspos("I021",4,"I018",1.0761,0.0835,-2.8008,idrotm[337],"ONLY");
-  gMC->Gspos("I021",3,"I018",-1.0761,0.0835,-1.0492,idrotm[338],"ONLY");
-  gMC->Gspos("I021",2,"I018",-1.0761,0.0835,-2.8008,idrotm[339],"ONLY");
-  gMC->Gspos("I023",2,"I018",0.0,-1.79,-1.925,idrotm[341],"ONLY");
-  gMC->Gspos("I019",3,"I018",-0.087,1.7066,0.0,idrotm[342],"ONLY");
-  gMC->Gspos("I020",3,"I018",0.0958,1.6913,0.0,idrotm[343],"ONLY");
-  gMC->Gspos("I019",2,"I018",1.987,-1.5843,0.0,idrotm[343],"ONLY");
-  gMC->Gspos("I020",2,"I018",1.8824,-1.735,0.0,idrotm[344],"ONLY");
-  gMC->Gspos("I022",1,"I018",0.0,-1.79,3.55,idrotm[312],"ONLY");
-  gMC->Gspos("I021",1,"I018",1.0761,0.0835,2.6008,idrotm[340],"ONLY");
-  gMC->Gspos("I023",1,"I018",0.0,-1.79,1.725,idrotm[341],"ONLY");
-  gMC->Gspos("I019",1,"I018",-1.9,-1.735,0.0,idrotm[344],"ONLY");
-  gMC->Gspos("I020",1,"I018",-1.9782,-1.569,0.0,idrotm[342],"ONLY");
-  gMC->Gspos("I033",1,"I018",1.8,-1.75,1.35,0,"MANY");
-  gMC->Gspos("I033",4,"I018",1.8,-1.75,-2.65,0,"MANY");
-  gMC->Gspos("I033",2,"I018",-1.8,-1.75,-2.65,idrotm[345],"MANY");
-  gMC->Gspos("I033",3,"I018",-1.8,-1.75,1.35,idrotm[345],"MANY");
-  gMC->Gspos("I036",1,"I018",0.3087,1.7191,3.56,idrotm[346],"ONLY");
-  gMC->Gspos("I036",4,"I018",-0.3087,1.7191,3.56,idrotm[347],"ONLY");
-  gMC->Gspos("I036",2,"I018",0.3087,1.7191,-0.11,idrotm[346],"ONLY");
-  gMC->Gspos("I036",3,"I018",-0.3087,1.7191,-0.11,idrotm[347],"ONLY");
-  gMC->Gspos("I034",1,"I018",1.6,-1.775,1.35,idrotm[312],"ONLY");
-  gMC->Gspos("I034",4,"I018",1.6,-1.775,-2.65,idrotm[312],"ONLY");
-  gMC->Gspos("I034",2,"I018",-1.6,-1.775,-2.65,idrotm[348],"ONLY");
-  gMC->Gspos("I034",3,"I018",-1.6,-1.775,1.35,idrotm[348],"ONLY");
-  gMC->Gspos("I035",2,"I018",-1.7,-0.55,2.8581,idrotm[345],"MANY");
-  gMC->Gspos("I035",1,"I018",1.7,-0.55,2.8581,0,"MANY");
-  gMC->Gspos("I045",1,"I018",0.7483,0.9337,0.0,idrotm[346],"ONLY");
-  gMC->Gspos("I045",2,"I018",0.7065,0.9337,0.0,idrotm[346],"ONLY");
-  gMC->Gspos("I045",3,"I018",-0.7483,0.9337,0.0,idrotm[347],"ONLY");
-  gMC->Gspos("I045",4,"I018",-0.7065,0.9337,0.0,idrotm[347],"ONLY");
-  gMC->Gspos("I038",1,"I018",1.7,-0.55,0.0,idrotm[346],"ONLY");
-  gMC->Gspos("I037",1,"I018",1.7,-0.55,0.0,idrotm[346],"ONLY");
-  gMC->Gspos("I037",2,"I018",-1.7,-0.55,0.0,idrotm[347],"ONLY");
-  gMC->Gspos("I038",2,"I018",-1.7,-0.55,0.0,idrotm[347],"ONLY");
-  gMC->Gspos("I039",1,"I018",1.8126,-0.485,0.0,idrotm[346],"ONLY");
-  gMC->Gspos("I040",1,"I018",1.9204,-0.7118,0.0,idrotm[346],"ONLY");
-  gMC->Gspos("I041",1,"I018",1.7,-0.55,0.0,idrotm[346],"ONLY");
-  gMC->Gspos("I042",1,"I018",2.0342,-0.8189,3.12,idrotm[346],"ONLY");
-  gMC->Gspos("I042",2,"I018",2.0342,-0.8189,2.28,idrotm[346],"ONLY");
-  gMC->Gspos("I042",3,"I018",2.0342,-0.8189,1.38,idrotm[346],"ONLY");
-  gMC->Gspos("I042",4,"I018",2.0342,-0.8189,0.48,idrotm[346],"ONLY");
-  gMC->Gspos("I042",5,"I018",2.0342,-0.8189,-0.42,idrotm[346],"ONLY");
-  gMC->Gspos("I042",6,"I018",2.0342,-0.8189,-1.32,idrotm[346],"ONLY");
-  gMC->Gspos("I042",7,"I018",2.0342,-0.8189,-2.22,idrotm[346],"ONLY");
-  gMC->Gspos("I042",8,"I018",2.0342,-0.8189,-3.12,idrotm[346],"ONLY");
-  gMC->Gspos("I043",8,"I018",1.5592,0.0038,-3.15,idrotm[346],"ONLY");
-  gMC->Gspos("I043",7,"I018",1.5592,0.0038,-2.25,idrotm[346],"ONLY");
-  gMC->Gspos("I043",6,"I018",1.5592,0.0038,-1.35,idrotm[346],"ONLY");
-  gMC->Gspos("I043",5,"I018",1.5592,0.0038,-0.45,idrotm[346],"ONLY");
-  gMC->Gspos("I043",4,"I018",1.5592,0.0038,0.45,idrotm[346],"ONLY");
-  gMC->Gspos("I043",3,"I018",1.5592,0.0038,1.35,idrotm[346],"ONLY");
-  gMC->Gspos("I043",2,"I018",1.5592,0.0038,2.25,idrotm[346],"ONLY");
-  gMC->Gspos("I043",1,"I018",1.5592,0.0038,3.15,idrotm[346],"ONLY");
-  gMC->Gspos("I039",2,"I018",-1.8126,-0.485,0.0,idrotm[347],"ONLY");
-  gMC->Gspos("I041",2,"I018",-1.7,-0.55,0.0,idrotm[347],"ONLY");
-  gMC->Gspos("I040",2,"I018",-1.9204,-0.7118,0.0,idrotm[347],"ONLY");
-  gMC->Gspos("I043",16,"I018",-1.5592,0.0038,-3.15,idrotm[347],"ONLY");
-  gMC->Gspos("I042",9,"I018",-2.0342,-0.8189,-3.12,idrotm[347],"ONLY");
-  gMC->Gspos("I043",15,"I018",-1.5592,0.0038,-2.25,idrotm[347],"ONLY");
-  gMC->Gspos("I042",10,"I018",-2.0342,-0.8189,-2.22,idrotm[347],"ONLY");
-  gMC->Gspos("I042",11,"I018",-2.0342,-0.8189,-1.32,idrotm[347],"ONLY");
-  gMC->Gspos("I043",14,"I018",-1.5592,0.0038,-1.35,idrotm[347],"ONLY");
-  gMC->Gspos("I042",12,"I018",-2.0342,-0.8189,-0.42,idrotm[347],"ONLY");
-  gMC->Gspos("I043",13,"I018",-1.5592,0.0038,-0.45,idrotm[347],"ONLY");
-  gMC->Gspos("I043",12,"I018",-1.5592,0.0038,0.45,idrotm[347],"ONLY");
-  gMC->Gspos("I043",11,"I018",-1.5592,0.0038,1.35,idrotm[347],"ONLY");
-  gMC->Gspos("I043",10,"I018",-1.5592,0.0038,2.25,idrotm[347],"ONLY");
-  gMC->Gspos("I043",9,"I018",-1.5592,0.0038,3.15,idrotm[347],"ONLY");
-  gMC->Gspos("I042",16,"I018",-2.0342,-0.8189,3.12,idrotm[347],"ONLY");
-  gMC->Gspos("I042",15,"I018",-2.0342,-0.8189,2.28,idrotm[347],"ONLY");
-  gMC->Gspos("I042",14,"I018",-2.0342,-0.8189,1.38,idrotm[347],"ONLY");
-  gMC->Gspos("I042",13,"I018",-2.0342,-0.8189,0.48,idrotm[347],"ONLY");
-  gMC->Gspos("I044",2,"I018",-2.7487,-1.3673,-0.2,idrotm[349],"ONLY");
-  gMC->Gspos("I044",1,"I018",2.7487,-1.3673,-0.2,idrotm[351],"ONLY");
-  gMC->Gspos("I303",1,"I302",1.8125,0.0,4.2605,idrotm[301],"ONLY");
-  gMC->Gspos("I303",2,"I302",-1.8125,0.0,4.2605,idrotm[302],"ONLY");
-  gMC->Gspos("I303",3,"I302",-1.8125,0.0,-4.2605,idrotm[303],"ONLY");
-  gMC->Gspos("I303",4,"I302",1.8125,0.0,-4.2605,idrotm[304],"ONLY");
-  gMC->Gspos("I403",1,"I402",1.8125,0.0,4.2605,idrotm[301],"ONLY");
-  gMC->Gspos("I403",2,"I402",-1.8125,0.0,4.2605,idrotm[302],"ONLY");
-  gMC->Gspos("I403",3,"I402",-1.8125,0.0,-4.2605,idrotm[303],"ONLY");
-  gMC->Gspos("I403",4,"I402",1.8125,0.0,-4.2605,idrotm[304],"ONLY");
-  gMC->Gspos("ITS3",1,"I302",0.0,0.0,0.0,0,"ONLY");
-  gMC->Gspos("ITS4",1,"I402",0.0,0.0,0.0,0,"ONLY");
+  // -- position SDD detectors of ladder 3 / layer 3
+
+  gMC->Gspos("ITS3", 1,"I302",  0.0,      0.0,    0.0,    0,           "ONLY");
+  ySDD = Y_SDD_sep/2.+I302dits[1];
+  for (iSDD=0; iSDD<6; iSDD++) {
+    gMC->Gspos("I302", iSDD+1, "I004",  0.0, ySDD,  Z_SDD_lay3[iSDD], 0, "ONLY");
+    ySDD = -ySDD;
+  }
+
+  gMC->Gspos("I004", 1,"IT34", -3.2777,  14.3607, 0.0,   idrotm[321],"ONLY");
+  gMC->Gspos("I004", 2,"IT34", -9.5581,  11.9855, 0.0,   idrotm[333],"ONLY");
+  gMC->Gspos("I004", 3,"IT34",-13.2713,   6.3911, 0.0,   idrotm[336],"ONLY");
+  gMC->Gspos("I004", 4,"IT34",-15.33,     0.0,    0.0,   idrotm[350],"ONLY");
+  gMC->Gspos("I004", 5,"IT34",-13.2713,  -6.3911, 0.0,   idrotm[313],"ONLY");
+  gMC->Gspos("I004", 6,"IT34", -9.5581, -11.9855, 0.0,   idrotm[311],"ONLY");
+  gMC->Gspos("I004", 7,"IT34", -3.2777, -14.3607, 0.0,   idrotm[310],"ONLY");
+  gMC->Gspos("I004", 8,"IT34",  3.4112, -14.9456, 0.0,   idrotm[386],"ONLY");
+  gMC->Gspos("I004", 9,"IT34",  9.184,  -11.5164, 0.0,   idrotm[309],"ONLY");
+  gMC->Gspos("I004",10,"IT34", 13.8119,  -6.6514, 0.0,   idrotm[308],"ONLY");
+  gMC->Gspos("I004",11,"IT34", 14.73,     0.0,    0.0,   idrotm[356],"ONLY");
+  gMC->Gspos("I004",12,"IT34", 13.8119,   6.6514, 0.0,   idrotm[307],"ONLY");
+  gMC->Gspos("I004",13,"IT34",  9.184,   11.5164, 0.0,   idrotm[306],"ONLY");
+  gMC->Gspos("I004",14,"IT34",  3.4113,  14.9456, 0.0,   idrotm[305],"ONLY");
+
+
+  // -- position SDD detectors of ladder 4 / layer 4
+
+  gMC->Gspos("ITS4", 1,"I402",  0.0,      0.000,  0.0,   0,"ONLY");
+  ySDD = -(Y_SDD_sep/2.+I402dits[1]);
+  for (iSDD=0; iSDD<8; iSDD++) {
+    gMC->Gspos("I402", iSDD+1, "I005",  0.0, ySDD,  Z_SDD_lay4[iSDD], 0, "ONLY");
+    ySDD = -ySDD;
+  }
   
-  // --- Place SSD volumes into their mother volume IT56  
+  gMC->Gspos("I005", 1,"IT34", -3.3629,  23.3895,-0.15,  idrotm[335],"ONLY");
+  gMC->Gspos("I005", 2,"IT34",-10.0447,  21.9949,-0.15,  idrotm[332],"ONLY");
+  gMC->Gspos("I005", 3,"IT34",-15.4744,  17.8584,-0.15,  idrotm[331],"ONLY");
+  gMC->Gspos("I005", 4,"IT34",-20.3415,  13.0727,-0.15,  idrotm[366],"ONLY");
+  gMC->Gspos("I005", 5,"IT34",-22.6728,   6.6573,-0.15,  idrotm[330],"ONLY");
+  gMC->Gspos("I005", 6,"IT34",-24.18,     0.0,   -0.15,  idrotm[350],"ONLY");
+  gMC->Gspos("I005", 7,"IT34",-22.6728,  -6.6573,-0.15,  idrotm[329],"ONLY");
+  gMC->Gspos("I005", 8,"IT34",-20.3415, -13.0727,-0.15,  idrotm[328],"ONLY");
+  gMC->Gspos("I005", 9,"IT34",-15.4744, -17.8584,-0.15,  idrotm[327],"ONLY");
+  gMC->Gspos("I005",10,"IT34",-10.0447, -21.9949,-0.15,  idrotm[326],"ONLY");
+  gMC->Gspos("I005",11,"IT34", -3.3629, -23.3895,-0.15,  idrotm[325],"ONLY");
+  gMC->Gspos("I005",12,"IT34",  3.4412, -23.9339,-0.15,  idrotm[324],"ONLY");
+  gMC->Gspos("I005",13,"IT34",  9.8163, -21.4946,-0.15,  idrotm[323],"ONLY");
+  gMC->Gspos("I005",14,"IT34", 15.8345, -18.274, -0.15,  idrotm[322],"ONLY");
+  gMC->Gspos("I005",15,"IT34", 19.8788, -12.7753,-0.15,  idrotm[320],"ONLY");
+  gMC->Gspos("I005",16,"IT34", 23.2005,  -6.8123,-0.15,  idrotm[319],"ONLY");
+  gMC->Gspos("I005",17,"IT34", 23.63,     0.0,   -0.15,  idrotm[318],"ONLY");
+  gMC->Gspos("I005",18,"IT34", 23.2005,   6.8123,-0.15,  idrotm[317],"ONLY");
+  gMC->Gspos("I005",19,"IT34", 19.8788,  12.7753,-0.15,  idrotm[316],"ONLY");
+  gMC->Gspos("I005",20,"IT34", 15.8345,  18.274, -0.15,  idrotm[315],"ONLY");
+  gMC->Gspos("I005",21,"IT34",  9.8163,  21.4946,-0.15,  idrotm[314],"ONLY");
+  gMC->Gspos("I005",22,"IT34",  3.4412,  23.9339,-0.15,  idrotm[334],"ONLY");
+
+
+  // -- build block of the SDD ladder frame holding the electronics
+
+  gMC->Gspos("I019", 1,"I018", -1.9,     -1.735,  0.0, idrotm[344], "ONLY");
+  gMC->Gspos("I019", 2,"I018",  1.987,   -1.5843, 0.0, idrotm[343], "ONLY");
+  gMC->Gspos("I019", 3,"I018", -0.087,    1.7066, 0.0, idrotm[342], "ONLY");
+
+  gMC->Gspos("I020", 1,"I018", -1.9782,  -1.569,  0.0, idrotm[342], "ONLY");
+  gMC->Gspos("I020", 2,"I018",  1.8824,  -1.735,  0.0, idrotm[344], "ONLY");
+  gMC->Gspos("I020", 3,"I018",  0.0958,   1.6913, 0.0, idrotm[343], "ONLY");
+
+  gMC->Gspos("I021", 1,"I018",  1.0761,   0.0835, 2.6008, idrotm[340], "ONLY");
+  gMC->Gspos("I021", 2,"I018", -1.0761,   0.0835,-2.8008, idrotm[339], "ONLY");
+  gMC->Gspos("I021", 3,"I018", -1.0761,   0.0835,-1.0492, idrotm[338], "ONLY");
+  gMC->Gspos("I021", 4,"I018",  1.0761,   0.0835,-2.8008, idrotm[337], "ONLY");
+  gMC->Gspos("I021", 5,"I018",  1.0761,   0.0835,-1.0492, idrotm[340], "ONLY");
+  gMC->Gspos("I021", 6,"I018", -1.0761,   0.0835, 0.8492, idrotm[339], "ONLY");
+  gMC->Gspos("I021", 7,"I018", -1.0761,   0.0835, 2.6008, idrotm[338], "ONLY");
+  gMC->Gspos("I021", 8,"I018",  1.0761,   0.0835, 0.8492, idrotm[337], "ONLY");
+
+  gMC->Gspos("I022", 1,"I018",  0.0,     -1.79,   3.55,   idrotm[312], "ONLY");
+  gMC->Gspos("I022", 2,"I018",  0.0,     -1.79,  -0.1,    idrotm[312], "ONLY");
+
+  gMC->Gspos("I023", 1,"I018",  0.0,     -1.79,   1.725,  idrotm[341], "ONLY");
+  gMC->Gspos("I023", 2,"I018",  0.0,     -1.79,  -1.925,  idrotm[341], "ONLY");
+
+  gMC->Gspos("I033", 1,"I018",  1.8,     -1.75,   1.35,   0,           "MANY");
+  gMC->Gspos("I033", 2,"I018", -1.8,     -1.75,  -2.65,   idrotm[345], "MANY");
+  gMC->Gspos("I033", 3,"I018", -1.8,     -1.75,   1.35,   idrotm[345], "MANY");
+  gMC->Gspos("I033", 4,"I018",  1.8,     -1.75,  -2.65,   0,           "MANY");
+
+  gMC->Gspos("I034", 1,"I018",  1.6,     -1.775,  1.35,   idrotm[312], "ONLY");
+  gMC->Gspos("I034", 2,"I018", -1.6,     -1.775, -2.65,   idrotm[348], "ONLY");
+  gMC->Gspos("I034", 3,"I018", -1.6,     -1.775,  1.35,   idrotm[348], "ONLY");
+  gMC->Gspos("I034", 4,"I018",  1.6,     -1.775, -2.65,   idrotm[312], "ONLY");
+
+  gMC->Gspos("I035", 1,"I018",  1.7,     -0.55, I018dits[2]-I035dits[2], 0, "MANY");
+  gMC->Gspos("I035", 2,"I018", -1.7,     -0.55, I018dits[2]-I035dits[2], 0, "MANY");
+
+  gMC->Gspos("I036", 1,"I018",  0.3087,   1.7191, 3.56,   idrotm[346], "ONLY");
+  gMC->Gspos("I036", 2,"I018",  0.3087,   1.7191,-0.11,   idrotm[346], "ONLY");
+  gMC->Gspos("I036", 3,"I018", -0.3087,   1.7191,-0.11,   idrotm[347], "ONLY");
+  gMC->Gspos("I036", 4,"I018", -0.3087,   1.7191, 3.56,   idrotm[347], "ONLY");
+
+  gMC->Gspos("I037", 1,"I018",  SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], 0 , "ONLY");
+  gMC->Gspos("I037", 2,"I018", -SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], 0 , "ONLY");
+
+  gMC->Gspos("I038", 1,"I018",  SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], 0 , "ONLY");
+  gMC->Gspos("I038", 2,"I018", -SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], 0 , "ONLY");
+
+  gMC->Gspos("I040", 1,"I018",  1.9204,  -0.7118, 0.0, idrotm[346],"ONLY");
+  gMC->Gspos("I040", 2,"I018", -1.9204,  -0.7118, 0.0, idrotm[347],"ONLY");
+  gMC->Gspos("I041", 1,"I018",  SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], idrotm[346], "ONLY");
+  gMC->Gspos("I041", 2,"I018", -SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], idrotm[347], "ONLY");
+
+
+  // -- build block of the SDD electronics (heat bridge, chips, hybrid, anode microcable)
+
+  xI050 = SDD_CoolPipe[0]+SDD_CoolPipe[1]*sin30+I050dits[1]/cos30+I041dits[1];
+  yI050 = 0;
+  xI039 = -SDD_CoolPipe[1]/cos30;
+  yI039 = -I050dits[1]+I039dits[1];
+  gMC->Gspos("I039", 1,"I050",  xI039, yI039, 0.0, 0, "ONLY");
+  xI042 = xI039+I039dits[0]-xI042space-I042dits[0];
+  yI042 = yI039+I039dits[1]+I042dits[1];
+  xI043 = xI039-I039dits[0]+xI043space+I043dits[0];
+  yI043 = yI039+I039dits[1]+I043dits[1];
+  zChipSpace = I042dits[2];
+  if (zChipSpace < I043dits[2]) {
+    zChipSpace = I043dits[2];
+  }
+  zChipSpace = zChipSpace * 2;
+  yI051space = (2*I039dits[2] - 4*zChipSpace)/5;
+  zchip = -I039dits[2] + yI051space + zChipSpace/2.;
+  for (ichip=0; ichip<4; ichip++) { 
+    gMC->Gspos("I042", ichip+1, "I050", xI042, yI042, zchip, 0, "ONLY");
+    gMC->Gspos("I043", ichip+1, "I050", xI043, yI043, zchip, 0, "ONLY");
+    zchip += zChipSpace + yI051space;
+  }
+  xcap = 2*I039dits[0]/5.;
+  yI051 = yI039+I039dits[1]+I051dits[1];
+  zI051 = -I039dits[2] + yI051space/3.;
+  icap = 1;
+  for (ichip=0; ichip<5; ichip++) { 
+    xI051 = xI039-I039dits[0]+xcap;
+    gMC->Gspos("I051", icap++,"I050", xI051, yI051, zI051, 0, "ONLY");
+    zI051 += yI051space/3.;
+    gMC->Gspos("I051", icap++,"I050", xI051, yI051, zI051, 0, "ONLY");
+    xI051 += xcap;
+    gMC->Gspos("I051", icap++,"I050", xI051, yI051, zI051, 0, "ONLY");
+    xI051 += xcap;
+    gMC->Gspos("I051", icap++,"I050", xI051, yI051, zI051, 0, "ONLY");
+    xI051 += xcap;
+    gMC->Gspos("I051", icap++,"I050", xI051, yI051, zI051, 0, "ONLY");
+    zI051 -= yI051space/3.;
+    if (ichip == 0) {
+      gMC->Gspos("I051", icap++,"I050", xI051, yI051, zI051, 0, "ONLY");
+    }
+    zI051 += zChipSpace + yI051space;
+  }
+  xI052 = -I050dits[0]+I052dits[0];
+  yI052 = yI051+I051dits[1]+I052dits[1];
+  gMC->Gspos("I052", 1,"I050", xI052, yI052, 0.0, 0, "ONLY");
+  xI044 = I050dits[0]-I044dits[3];
+  yI044 = yI052+I052dits[1]+I044dits[2];
+  gMC->Gspos("I044", 1,"I050", xI044, yI044, 0.0, idrotm[301], "ONLY");
+  gMC->Gspos("I050", 1,"I018",  xI050,  yI050,  0.0, idrotm[346],"ONLY");
+  gMC->Gspos("I050", 2,"I018", -xI050,  yI050,  0.0, idrotm[347],"ONLY");
+
+
+  // -- build block of the SDD ladder frame at the end ladders
+
+  gMC->Gspos("I021",12,"I024",  1.0761,   0.0836,-0.1242, idrotm[340], "ONLY");
+  gMC->Gspos("I021",11,"I024", -1.0761,   0.0836,-0.1242, idrotm[338], "ONLY");
+  gMC->Gspos("I021",13,"I024", -1.0761,   0.0836,-1.8758, idrotm[339], "ONLY");
+  gMC->Gspos("I021",14,"I024",  1.0761,   0.0836,-1.8758, idrotm[337], "ONLY");
+
+  gMC->Gspos("I022", 3,"I024",  0.0,     -1.7899, 0.825,  idrotm[312], "ONLY");
+
+  gMC->Gspos("I023", 3,"I024",  0.0,     -1.7899,-1.0,    idrotm[341], "ONLY");
+
+  gMC->Gspos("I025", 1,"I024", -1.9,     -1.7349, 0.0,    idrotm[344], "ONLY");
+  gMC->Gspos("I025", 2,"I024",  1.987,   -1.5842, 0.0,    idrotm[343], "ONLY");
+
+  gMC->Gspos("I026", 1,"I024", -1.9782,  -1.5689, 0.0,    idrotm[342], "ONLY");
+  gMC->Gspos("I026", 2,"I024",  1.8824,  -1.7349, 0.0,    idrotm[344], "ONLY");
+
+  gMC->Gspos("I029", 1,"I024", -0.087,    1.7067, I029dits[2]-I024dits[2], idrotm[342], "ONLY");
+
+  gMC->Gspos("I030", 1,"I024",  0.0958,   1.6914, I030dits[2]-I024dits[2], idrotm[343], "ONLY");
+
+  gMC->Gspos("I031", 1,"I024",  SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], 0 ,"ONLY");
+  gMC->Gspos("I031", 2,"I024", -SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], 0 ,"ONLY");
+
+  gMC->Gspos("I032", 1,"I024",  SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], 0 ,"ONLY");
+  gMC->Gspos("I032", 2,"I024", -SDD_CoolPipe[0], SDD_CoolPipe[1], SDD_CoolPipe[2], 0 ,"ONLY");
+
+
+  xI424 = I028dits[0]/3.;
+  yI424 = -I028dits[1]+I424dits[1];
+  gMC->Gspos("I422", 1,"I421", 0.0, 0.0, 0.0, 0, "ONLY");
+  gMC->Gspos("I423", 1,"I421", 0.0, 0.0, I421dits[2]-I423dits[2], 0, "ONLY");
+  gMC->Gspos("I421", 1,"I420", 0.0, 0.0, 0.0, idrotm[312], "ONLY");
+  gMC->Gspos("I420", 1,"I028", -I028dits[0]/3., I028dits[1]-I420dits[1], 0.0, 0, "ONLY");
+  gMC->Gspos("I424", 1,"I028", xI424, yI424, 0.0, 0, "ONLY");
+  gMC->Gspos("I028", 1,"I024", 0.0, I028dits[1]-I024dits[1], I024dits[2]-I028dits[2], 0, "MANY");
+
+
+  // -- build the SDD ladder 3
+
+  indI425 = 1;
+  gMC->Gspos("I024", 1,"I047",  0.0,      0.0,   24.625, 0,           "ONLY");  
+  gMC->Gspos("I018", 1,"I047",  0.0,      0.0,    3.65,  0,           "ONLY");
+  gMC->Gspos("I018", 2,"I047",  0.0,      0.0,   10.95,  0,           "ONLY");
+  gMC->Gspos("I018", 3,"I047",  0.0,      0.0,   18.25,  0,           "ONLY");
+  gMC->Gspos("I018", 4,"I047",  0.0,      0.0,   -3.65,  0,           "ONLY");
+  gMC->Gspos("I018", 5,"I047",  0.0,      0.0,  -10.95,  0,           "ONLY");
+  gMC->Gspos("I018", 6,"I047",  0.0,      0.0,  -18.25,  0,           "ONLY");
+  gMC->Gspos("I024", 2,"I047",  0.0,      0.0,  -24.625, idrotm[355], "ONLY");
+  HVname[0] = 'I';
+  HVname[1] = '3';
+  HVname[2] = '1';  
+  HVname[4] = '\0';
+  for (iSDD=0; iSDD<3; iSDD++) {
+    HVname[3] = (Char_t)(48+iSDD+5);
+    dits[0] = 1.350000;
+    dits[1] = I425dits[1];
+    dits[2] = (I047dits[2] - 2*I024dits[2] - Z_SDD_lay3[iSDD])/2.;
+    gMC->Gsvolu(HVname, "BOX ", idtmed[279], dits, 3);
+    xHV = 0.0;
+    yHV = -I047dits[1] + (2*iSDD+1)*dits[1];
+    zHV = I047dits[2] - 2*I024dits[2] - dits[2];
+    gMC->Gspos(HVname, 1,"I047", xHV, yHV,  zHV, 0, "ONLY");
+    gMC->Gspos(HVname, 2,"I047", xHV, yHV, -zHV, 0, "ONLY");
+    gMC->Gspos("I425", indI425++,"I047",  xI424, yHV,   24.625, 0, "ONLY");
+    gMC->Gspos("I425", indI425++,"I047", -xI424, yHV,  -24.625, 0, "ONLY");
+  }
+  LVname[0] = 'I';
+  LVname[1] = '3';
+  LVname[2] = '1';  
+  LVname[4] = '\0';
+  for (iSDD=0; iSDD<3; iSDD++) {
+    LVname[3] = (Char_t)(48+iSDD+1);
+    dits[0] = 1.350000;
+    dits[1] = 0.004423;
+    dits[2] = (I047dits[2] - (2*iSDD+1)*I018dits[2] - I039dits[2])/2.;
+    gMC->Gsvolu(LVname, "BOX ", idtmed[280], dits, 3);
+    yLV = I018dits[1] - dits[0]*cos30 - dits[1]*sin30;
+    xLV = xI050 -
+          fabs(yI050-yLV)*sin30/cos30 +
+          (I050dits[1]+(2*iSDD+1)*dits[1])/cos30;
+    zLV = I047dits[2] - dits[2];
+    gMC->Gspos(LVname, 1,"I047",  xLV, yLV,  zLV, idrotm[346], "ONLY");
+    gMC->Gspos(LVname, 2,"I047",  xLV, yLV, -zLV, idrotm[346], "ONLY");
+    gMC->Gspos(LVname, 3,"I047", -xLV, yLV,  zLV, idrotm[347], "ONLY");
+    gMC->Gspos(LVname, 4,"I047", -xLV, yLV, -zLV, idrotm[347], "ONLY");
+  }
+
+
+  // -- build the SDD ladder 4
+
+
+  gMC->Gspos("I024", 3,"I048", -0.0001,   0.0,   31.925, 0,           "ONLY");
+  gMC->Gspos("I018", 7,"I048", -0.0001,   0.0,   -3.65,  0,           "ONLY");
+  gMC->Gspos("I018", 8,"I048", -0.0001,   0.0,    3.65,  0,           "ONLY");
+  gMC->Gspos("I018", 9,"I048", -0.0001,   0.0,   10.95,  0,           "ONLY");
+  gMC->Gspos("I018",10,"I048", -0.0001,   0.0,   18.25,  0,           "ONLY");
+  gMC->Gspos("I018",11,"I048", -0.0001,   0.0,   25.55,  0,           "ONLY");
+  gMC->Gspos("I018",12,"I048", -0.0001,   0.0,  -10.95,  0,           "ONLY");
+  gMC->Gspos("I018",13,"I048", -0.0001,   0.0,  -18.25,  0,           "ONLY");
+  gMC->Gspos("I018",14,"I048", -0.0001,   0.0,  -25.55,  0,           "ONLY");
+  gMC->Gspos("I024", 4,"I048", -0.0001,   0.0,  -31.925, idrotm[355], "ONLY");
+  HVname[0] = 'I';
+  HVname[1] = '4';
+  HVname[2] = '1';  
+  HVname[4] = '\0';  
+  for (iSDD=0; iSDD<4; iSDD++) {
+    HVname[3] = (Char_t)(48+iSDD+5);
+    dits[0] = 1.350000;
+    dits[1] = I425dits[1];
+    dits[2] = (I048dits[2] - 2*I024dits[2] - Z_SDD_lay4[iSDD])/2.;
+    gMC->Gsvolu(HVname, "BOX ", idtmed[279], dits, 3);
+    xHV = -0.0001;
+    yHV = -I048dits[1] + (2*iSDD+1)*dits[1];
+    zHV = I048dits[2] - 2*I024dits[2] - dits[2];
+    gMC->Gspos(HVname, 1,"I048", xHV, yHV,  zHV, 0, "ONLY");
+    gMC->Gspos(HVname, 2,"I048", xHV, yHV, -zHV, 0, "ONLY");
+    gMC->Gspos("I425", indI425++,"I048",  xI424, yHV,   31.925, 0, "ONLY");
+    gMC->Gspos("I425", indI425++,"I048", -xI424, yHV,  -31.925, 0, "ONLY");
+  }
+  LVname[0] = 'I';
+  LVname[1] = '4';
+  LVname[2] = '1';  
+  LVname[4] = '\0';
+  for (iSDD=0; iSDD<4; iSDD++) {
+    LVname[3] = (Char_t)(48+iSDD+1);
+    dits[0] = 1.350000;
+    dits[1] = 0.004423;
+    dits[2] = (I048dits[2] - (2*iSDD+1)*I018dits[2] - I039dits[2])/2.;
+    gMC->Gsvolu(LVname, "BOX ", idtmed[280], dits, 3);
+    yLV = I018dits[1] - dits[0]*cos30 - dits[1]*sin30;
+    xLV = xI050 -
+          fabs(yI050-yLV)*sin30/cos30 +
+          (I050dits[1]+(2*iSDD+1)*dits[1])/cos30;
+    zLV = I048dits[2] - dits[2];
+    gMC->Gspos(LVname, 1,"I048",  xLV, yLV,  zLV, idrotm[346], "ONLY");
+    gMC->Gspos(LVname, 2,"I048",  xLV, yLV, -zLV, idrotm[346], "ONLY");
+    gMC->Gspos(LVname, 3,"I048", -xLV, yLV,  zLV, idrotm[347], "ONLY");
+    gMC->Gspos(LVname, 4,"I048", -xLV, yLV, -zLV, idrotm[347], "ONLY");
+  }
+
 
+  // -- build the SDD barrel (layers 3 and 4)
+
+  gMC->Gspos("I047", 1,"IT34", -3.7528,  16.4422, 0.0,   idrotm[321], "ONLY");
+  gMC->Gspos("I047", 2,"IT34",-10.8892,  13.6547, 0.0,   idrotm[333], "ONLY");
+  gMC->Gspos("I047", 3,"IT34",-15.1948,   7.3175, 0.0,   idrotm[336], "ONLY");
+  gMC->Gspos("I047", 4,"IT34",-17.465,    0.0,    0.0,   idrotm[350], "ONLY");
+  gMC->Gspos("I047", 5,"IT34",-15.1948,  -7.3174, 0.0,   idrotm[313], "ONLY");
+  gMC->Gspos("I047", 6,"IT34",-10.8893, -13.6547, 0.0,   idrotm[311], "ONLY");
+  gMC->Gspos("I047", 7,"IT34", -3.7528, -16.4422, 0.0,   idrotm[310], "ONLY");
+  gMC->Gspos("I047", 8,"IT34",  3.8863, -17.0271, 0.0,   idrotm[386], "ONLY");
+  gMC->Gspos("I047", 9,"IT34", 10.5152, -13.1856, 0.0,   idrotm[309], "ONLY");
+  gMC->Gspos("I047",10,"IT34", 15.7354,  -7.5778, 0.0,   idrotm[308], "ONLY");
+  gMC->Gspos("I047",11,"IT34", 16.865,    0.0,    0.0,   idrotm[356], "ONLY");
+  gMC->Gspos("I047",12,"IT34", 15.7354,   7.5778, 0.0,   idrotm[307], "ONLY");
+  gMC->Gspos("I047",13,"IT34", 10.5152,  13.1856, 0.0,   idrotm[306], "ONLY");
+  gMC->Gspos("I047",14,"IT34",  3.8863,  17.0271, 0.0,   idrotm[305], "ONLY");
+
+  gMC->Gspos("I048", 1,"IT34", -3.6667,  25.5027, 0.0,   idrotm[335], "ONLY");
+  gMC->Gspos("I048", 2,"IT34",-10.9317,  23.937,  0.0,   idrotm[332], "ONLY");
+  gMC->Gspos("I048", 3,"IT34",-16.8725,  19.4719, 0.0,   idrotm[331], "ONLY");
+  gMC->Gspos("I048", 4,"IT34",-22.1376,  14.227,  0.0,   idrotm[366], "ONLY");
+  gMC->Gspos("I048", 5,"IT34",-24.7213,   7.2588, 0.0,   idrotm[330], "ONLY");
+  gMC->Gspos("I048", 6,"IT34",-26.315,    0.0,    0.0,   idrotm[350], "ONLY");
+  gMC->Gspos("I048", 7,"IT34",-24.7213,  -7.2588, 0.0,   idrotm[329], "ONLY");
+  gMC->Gspos("I048", 8,"IT34",-22.1376, -14.227,  0.0,   idrotm[328], "ONLY");
+  gMC->Gspos("I048", 9,"IT34",-16.8725, -19.4719, 0.0,   idrotm[327], "ONLY");
+  gMC->Gspos("I048",10,"IT34",-10.9316, -23.937,  0.0,   idrotm[326], "ONLY");
+  gMC->Gspos("I048",11,"IT34", -3.6667, -25.5027, 0.0,   idrotm[325], "ONLY");
+  gMC->Gspos("I048",12,"IT34",  3.745,  -26.0472, 0.0,   idrotm[324], "ONLY");
+  gMC->Gspos("I048",13,"IT34", 10.7032, -23.4367, 0.0,   idrotm[323], "ONLY");
+  gMC->Gspos("I048",14,"IT34", 17.2327, -19.8876, 0.0,   idrotm[322], "ONLY");
+  gMC->Gspos("I048",15,"IT34", 21.6749, -13.9296, 0.0,   idrotm[320], "ONLY");
+  gMC->Gspos("I048",16,"IT34", 25.2491,  -7.4138, 0.0,   idrotm[319], "ONLY");
+  gMC->Gspos("I048",17,"IT34", 25.765,    0.0,    0.0,   idrotm[318], "ONLY");
+  gMC->Gspos("I048",18,"IT34", 25.2491,   7.4138, 0.0,   idrotm[317], "ONLY");
+  gMC->Gspos("I048",19,"IT34", 21.6749,  13.9296, 0.0,   idrotm[316], "ONLY");
+  gMC->Gspos("I048",20,"IT34", 17.2327,  19.8876, 0.0,   idrotm[315], "ONLY");
+  gMC->Gspos("I048",21,"IT34", 10.7032,  23.4367, 0.0,   idrotm[314], "ONLY");
+  gMC->Gspos("I048",22,"IT34", 3.745,    26.0472, 0.0,   idrotm[334], "ONLY");
 
+  
+  // --- Place SSD volumes into their mother volume IT56  
 
-  gMC->Gspos("I570",14,"IT56",-28.0681,-36.0619,-0.27,idrotm[566],"ONLY");
+
+  gMC->Gspos("I570",14,"IT56",-28.0681,-36.0619,-0.27,idrotm[566],"ONLY"); 
   gMC->Gspos("I570",15,"IT56",-21.677,-40.0556,-0.27,idrotm[567],"ONLY");
   gMC->Gspos("I570",16,"IT56",-14.838,-43.2217,-0.27,idrotm[568],"ONLY");
   gMC->Gspos("I570",17,"IT56",-7.4965,-44.9238,-0.27,idrotm[569],"ONLY");
-  gMC->Gspos("I570",18,"IT56",0.0,-45.6977,-0.27,idrotm[533],"ONLY");
+  gMC->Gspos("I570",18,"IT56",-0.27,-45.6977,-0.27,idrotm[533],"ONLY");
   gMC->Gspos("I570",19,"IT56",7.4965,-44.9238,-0.27,idrotm[534],"ONLY");
   gMC->Gspos("I570",20,"IT56",14.838,-43.2217,-0.27,idrotm[535],"ONLY");
   gMC->Gspos("I570",21,"IT56",21.677,-40.0556,-0.27,idrotm[623],"ONLY");
@@ -1802,7 +3388,7 @@ void AliITSvPPRsymm::CreateGeometry(){
   gMC->Gspos("I570",34,"IT56",21.7497,40.1899,-0.27,idrotm[549],"ONLY");
   gMC->Gspos("I570",35,"IT56",14.7884,43.0772,-0.27,idrotm[550],"ONLY");
   gMC->Gspos("I570",36,"IT56",7.5216,45.0744,-0.27,idrotm[551],"ONLY");
-  gMC->Gspos("I570",37,"IT56",0.0,45.545,-0.27,0,"ONLY");
+  gMC->Gspos("I570",37,"IT56",0.,45.545,-0.27,0,"ONLY");
   gMC->Gspos("I570",38,"IT56",-7.5216,45.0744,-0.27,idrotm[552],"ONLY");
   gMC->Gspos("I570",1,"IT56",-14.7884,43.0772,-0.27,idrotm[553],"ONLY");
   gMC->Gspos("I570",2,"IT56",-21.7497,40.1899,-0.27,idrotm[620],"ONLY");
@@ -1923,34 +3509,33 @@ void AliITSvPPRsymm::CreateGeometry(){
   gMC->Gspos("I565",16,"IT56",-13.9434,-35.992,0.0,idrotm[531],"ONLY");
   gMC->Gspos("I565",15,"IT56",-20.2387,-32.6866,0.0,idrotm[501],"ONLY");
   gMC->Gspos("I565",14,"IT56",-26.0036,-28.5246,0.0,idrotm[503],"ONLY");
-  gMC->Gspos("I553",1,"I570",0.005,0.0,53.98,0,"ONLY");
-  gMC->Gspos("I523",2,"I570",0.0,0.0,48.875,0,"ONLY");
-  gMC->Gspos("I523",3,"I570",0.0,0.0,44.965,0,"ONLY");
-  gMC->Gspos("I523",4,"I570",0.0,0.0,41.055,0,"ONLY");
-  gMC->Gspos("I523",5,"I570",0.0,0.0,33.235,0,"ONLY");
-  gMC->Gspos("I523",6,"I570",0.0,0.0,37.145,0,"ONLY");
-  gMC->Gspos("I523",7,"I570",0.0,0.0,29.325,0,"ONLY");
-  gMC->Gspos("I523",8,"I570",0.0,0.0,25.415,0,"ONLY");
-  gMC->Gspos("I523",9,"I570",0.0,0.0,21.505,0,"ONLY");
-  gMC->Gspos("I523",10,"I570",0.0,0.0,13.685,0,"ONLY");
-  gMC->Gspos("I523",11,"I570",0.0,0.0,17.595,0,"ONLY");
-  gMC->Gspos("I523",12,"I570",0.0,0.0,9.775,0,"ONLY");
-  gMC->Gspos("I523",13,"I570",0.0,0.0,5.865,0,"ONLY");
-  gMC->Gspos("I523",14,"I570",0.0,0.0,1.955,0,"ONLY");
-  gMC->Gspos("I523",15,"I570",0.0,0.0,-1.955,0,"ONLY");
-  gMC->Gspos("I523",16,"I570",0.0,0.0,-9.775,0,"ONLY");
-  gMC->Gspos("I523",17,"I570",0.0,0.0,-5.865,0,"ONLY");
-  gMC->Gspos("I523",18,"I570",0.0,0.0,-13.685,0,"ONLY");
-  gMC->Gspos("I523",19,"I570",0.0,0.0,-21.505,0,"ONLY");
-  gMC->Gspos("I523",20,"I570",0.0,0.0,-17.595,0,"ONLY");
-  gMC->Gspos("I523",21,"I570",0.0,0.0,-25.415,0,"ONLY");
-  gMC->Gspos("I523",22,"I570",0.0,0.0,-29.325,0,"ONLY");
-  gMC->Gspos("I523",23,"I570",0.0,0.0,-37.145,0,"ONLY");
-  gMC->Gspos("I523",24,"I570",0.0,0.0,-33.235,0,"ONLY");
-  gMC->Gspos("I523",25,"I570",0.0,0.0,-44.965,0,"ONLY");
-  gMC->Gspos("I523",26,"I570",0.0,0.0,-41.055,0,"ONLY");
-  gMC->Gspos("I553",2,"I570",-0.005,0.0,-53.98,idrotm[570],"ONLY");
-  gMC->Gspos("I523",1,"I570",0.0,0.0,-48.875,0,"ONLY");
+  gMC->Gspos("I553",1,"I570",0.005,0.0,52.8453,0,"ONLY");
+  gMC->Gspos("I523",1,"I570",0.0,0.0,46.9203+0.82,0,"ONLY");
+  gMC->Gspos("I523",2,"I570",0.0,0.0,43.0103+0.82,0,"ONLY");
+  gMC->Gspos("I523",3,"I570",0.0,0.0,39.1003+0.82,0,"ONLY");
+  gMC->Gspos("I523",4,"I570",0.0,0.0,35.1903+0.82,0,"ONLY");
+  gMC->Gspos("I523",5,"I570",0.0,0.0,31.2803+0.82,0,"ONLY");
+  gMC->Gspos("I523",6,"I570",0.0,0.0,27.3703+0.82,0,"ONLY");
+  gMC->Gspos("I523",7,"I570",0.0,0.0,23.4603+0.82,0,"ONLY");
+  gMC->Gspos("I523",8,"I570",0.0,0.0,19.5503+0.82,0,"ONLY");
+  gMC->Gspos("I523",9,"I570",0.0,0.0,15.6403+0.82,0,"ONLY");
+  gMC->Gspos("I523",10,"I570",0.0,0.0,11.7303+0.82,0,"ONLY");
+  gMC->Gspos("I523",11,"I570",0.0,0.0,7.8203+0.82,0,"ONLY");
+  gMC->Gspos("I523",12,"I570",0.0,0.0,3.9103+0.82,0,"ONLY");
+  gMC->Gspos("I523",13,"I570",0.0,0.0,0.0003+0.82,0,"ONLY");
+  gMC->Gspos("I523",14,"I570",0.0,0.0,-3.9097+0.82,0,"ONLY");
+  gMC->Gspos("I523",15,"I570",0.0,0.0,-7.8197+0.82,0,"ONLY");
+  gMC->Gspos("I523",16,"I570",0.0,0.0,-11.7297+0.82,0,"ONLY");
+  gMC->Gspos("I523",17,"I570",0.0,0.0,-15.6397+0.82,0,"ONLY");
+  gMC->Gspos("I523",18,"I570",0.0,0.0,-19.5497+0.82,0,"ONLY");
+  gMC->Gspos("I523",19,"I570",0.0,0.0,-23.4597+0.82,0,"ONLY");
+  gMC->Gspos("I523",20,"I570",0.0,0.0,-27.3697+0.82,0,"ONLY");
+  gMC->Gspos("I523",21,"I570",0.0,0.0,-31.2797+0.82,0,"ONLY");
+  gMC->Gspos("I523",22,"I570",0.0,0.0,-35.1897+0.82,0,"ONLY");
+  gMC->Gspos("I523",23,"I570",0.0,0.0,-39.0997+0.82,0,"ONLY");
+  gMC->Gspos("I523",24,"I570",0.0,0.0,-43.0097+0.82,0,"ONLY");
+  gMC->Gspos("I523",25,"I570",0.0,0.0,-46.9197+0.82,0,"ONLY");
+  gMC->Gspos("I553",2,"I570",-0.005,0.0,-51.2047,idrotm[570],"ONLY");
   gMC->Gspos("I566",1,"I569",0.0,-0.03,46.9203,idrotm[532],"ONLY");
   gMC->Gspos("I566",2,"I569",0.0,0.03,43.0103,0,"ONLY");
   gMC->Gspos("I566",3,"I569",0.0,-0.03,39.1003,idrotm[532],"ONLY");
@@ -1976,31 +3561,28 @@ void AliITSvPPRsymm::CreateGeometry(){
   gMC->Gspos("I566",23,"I569",0.0,-0.03,-39.0997,0,"ONLY");
   gMC->Gspos("I566",24,"I569",0.0,0.03,-43.0097,0,"ONLY");
   gMC->Gspos("I566",25,"I569",0.0,-0.03,-46.9197,idrotm[532],"ONLY");
-  gMC->Gspos("I544",1,"I571",0.0101,0.0,48.115,0,"ONLY");
-  gMC->Gspos("I516",23,"I571",0.0001,0.0,43.01,0,"ONLY");
-  gMC->Gspos("I516",22,"I571",0.0001,0.0,39.1,0,"ONLY");
-  gMC->Gspos("I516",21,"I571",0.0001,0.0,35.19,0,"ONLY");
-  gMC->Gspos("I516",20,"I571",0.0001,0.0,31.28,0,"ONLY");
-  gMC->Gspos("I516",19,"I571",0.0001,0.0,27.37,0,"ONLY");
-  gMC->Gspos("I516",18,"I571",0.0001,0.0,23.46,0,"ONLY");
-  gMC->Gspos("I516",17,"I571",0.0001,0.0,19.55,0,"ONLY");
-  gMC->Gspos("I516",16,"I571",0.0001,0.0,15.64,0,"ONLY");
-  gMC->Gspos("I516",15,"I571",0.0001,0.0,11.73,0,"ONLY");
-  gMC->Gspos("I516",14,"I571",0.0001,0.0,7.82,0,"ONLY");
-  gMC->Gspos("I516",13,"I571",0.0001,0.0,3.91,0,"ONLY");
-  gMC->Gspos("I516",12,"I571",0.0001,0.0,0.0,0,"ONLY");
-  gMC->Gspos("I516",11,"I571",0.0001,0.0,-3.91,0,"ONLY");
-  gMC->Gspos("I516",10,"I571",0.0001,0.0,-7.82,0,"ONLY");
-  gMC->Gspos("I516",9,"I571",0.0001,0.0,-11.73,0,"ONLY");
-  gMC->Gspos("I516",8,"I571",0.0001,0.0,-15.64,0,"ONLY");
-  gMC->Gspos("I516",7,"I571",0.0001,0.0,-19.55,0,"ONLY");
-  gMC->Gspos("I516",6,"I571",0.0001,0.0,-23.46,0,"ONLY");
-  gMC->Gspos("I516",5,"I571",0.0001,0.0,-27.37,0,"ONLY");
-  gMC->Gspos("I516",4,"I571",0.0001,0.0,-31.28,0,"ONLY");
-  gMC->Gspos("I516",3,"I571",0.0001,0.0,-35.19,0,"ONLY");
-  gMC->Gspos("I516",2,"I571",0.0001,0.0,-39.1,0,"ONLY");
-  gMC->Gspos("I516",1,"I571",0.0001,0.0,-43.01,0,"ONLY");
-  gMC->Gspos("I544",2,"I571",-0.0099,0.0,-48.115,idrotm[570],"ONLY");
+  gMC->Gspos("I544",1,"I571",0.0101,0.0,43.125,0,"ONLY");
+  gMC->Gspos("I516",20,"I571",0.0001,0.0,39.1-1.08,0,"ONLY");
+  gMC->Gspos("I516",19,"I571",0.0001,0.0,35.19-1.08,0,"ONLY");
+  gMC->Gspos("I516",18,"I571",0.0001,0.0,31.28-1.08,0,"ONLY");
+  gMC->Gspos("I516",17,"I571",0.0001,0.0,27.37-1.08,0,"ONLY");
+  gMC->Gspos("I516",16,"I571",0.0001,0.0,23.46-1.08,0,"ONLY");
+  gMC->Gspos("I516",15,"I571",0.0001,0.0,19.55-1.08,0,"ONLY");
+  gMC->Gspos("I516",14,"I571",0.0001,0.0,15.64-1.08,0,"ONLY");
+  gMC->Gspos("I516",13,"I571",0.0001,0.0,11.73-1.08,0,"ONLY");
+  gMC->Gspos("I516",12,"I571",0.0001,0.0,7.82-1.08,0,"ONLY");
+  gMC->Gspos("I516",11,"I571",0.0001,0.0,3.91-1.08,0,"ONLY");
+  gMC->Gspos("I516",10,"I571",0.0001,0.0,0.0-1.08,0,"ONLY");
+  gMC->Gspos("I516",9,"I571",0.0001,0.0,-3.91-1.08,0,"ONLY");
+  gMC->Gspos("I516",8,"I571",0.0001,0.0,-7.82-1.08,0,"ONLY");
+  gMC->Gspos("I516",7,"I571",0.0001,0.0,-11.73-1.08,0,"ONLY");
+  gMC->Gspos("I516",6,"I571",0.0001,0.0,-15.64-1.08,0,"ONLY");
+  gMC->Gspos("I516",5,"I571",0.0001,0.0,-19.55-1.08,0,"ONLY");
+  gMC->Gspos("I516",4,"I571",0.0001,0.0,-23.46-1.08,0,"ONLY");
+  gMC->Gspos("I516",3,"I571",0.0001,0.0,-27.37-1.08,0,"ONLY");
+  gMC->Gspos("I516",2,"I571",0.0001,0.0,-31.28-1.08,0,"ONLY");
+  gMC->Gspos("I516",1,"I571",0.0001,0.0,-35.19-1.08,0,"ONLY");
+  gMC->Gspos("I544",2,"I571",-0.0099,0.0,-41.375,idrotm[570],"ONLY");
   gMC->Gspos("I562",1,"I565",0.0,0.03,41.1546,0,"ONLY");
   gMC->Gspos("I562",2,"I565",0.0,-0.03,37.2246,0,"ONLY");
   gMC->Gspos("I562",3,"I565",0.0,0.03,33.3146,0,"ONLY");
@@ -2213,157 +3795,370 @@ void AliITSvPPRsymm::CreateGeometry(){
   gMC->Gspos("I533",1,"I516",2.1,-1.615,0.955,0,"MANY");
   gMC->Gspos("I533",2,"I516",-2.1,-1.615,0.955,idrotm[573],"MANY");
   gMC->Gspos("ITS5",1,"I562",0.0,0.0,0.0,0,"ONLY");
-  
-  
-  // --- Place subdetectors' mother volumes into ITS mother volume ITSD
-    
-  gMC->Gspos("IT12",1,"ITSD",0.0,0.0,0.0,0,"ONLY"); 
-  gMC->Gspos("IT34",1,"ITSD",0.0,0.0,0.0,0,"ONLY"); 
-  gMC->Gspos("IT56",1,"ITSD",0.0,0.0,0.0,0,"ONLY"); 
-  //gMC->Gspos("IS01",1,"ITSD",0.0,0.0,0.0,0,"ONLY"); 
-  //gMC->Gspos("IS02",1,"ITSD",0.0,0.0,0.0,0,"ONLY");         
-  
 
   
-  
-  
-  
-  
-  
-  // ********************************************************************
-
+  // --- Place volumes of shield between SPD and SDD 
+
+
+  gMC->Gspos("IC01",1,"ITSD",0.0,0.0,0.0,0,"ONLY");
+  gMC->Gspos("IC02",1,"ITSD",0.0,0.0,25.+8.75,0,"ONLY");  
+  gMC->Gspos("IC02",2,"ITSD",0.0,0.0,-25.-8.75,idrotm[200],"ONLY");  
+  //gMC->Gspos("IC03",1,"ITSD",0.0,0.0,25.+17.5+7.875,0,"ONLY");  
+  //gMC->Gspos("IC03",2,"ITSD",0.0,0.0,-25.-17.5-7.875,idrotm[200],"ONLY");   
+  
+  
+  // --- Place volumes of cylinders between SPD and SDD and SDD and SSD 
+  
+  gMC->Gspos("ICY1",1,"IS02",0.0,0.0,0.,0,"ONLY");    
+  gMC->Gspos("ICY2",1,"IS01",0.0,0.0,0.,0,"ONLY");    
+  
+
+  // --- Place volumes of SDD cone ---------------------------------- 
+  
+  
+  gMC->Gspos("I093",1,"IS02",0.0,0.0,0.0,0,"MANY");
+  gMC->Gspos("I093",2,"IS02",0.0,0.0,0.0,idrotm[856],"MANY");
+  gMC->Gspos("I099",4,"IS02",0.0,0.0,0.0,idrotm[857],"MANY");
+  gMC->Gspos("I099",3,"IS02",0.0,0.0,0.0,idrotm[858],"MANY");
+  gMC->Gspos("I099",5,"IS02",0.0,0.0,0.0,idrotm[859],"MANY");
+  gMC->Gspos("I099",6,"IS02",0.0,0.0,0.0,idrotm[860],"MANY");
+  gMC->Gspos("I099",7,"IS02",0.0,0.0,0.0,idrotm[861],"MANY");
+  gMC->Gspos("I099",2,"IS02",0.0,0.0,0.0,idrotm[862],"MANY");
+  gMC->Gspos("I200",4,"IS02",0.0,0.0,0.0,idrotm[863],"MANY");
+  gMC->Gspos("I200",3,"IS02",0.0,0.0,0.0,idrotm[864],"MANY");
+  gMC->Gspos("I200",2,"IS02",0.0,0.0,0.0,idrotm[865],"MANY");
+  gMC->Gspos("I200",13,"IS02",0.0,0.0,0.0,idrotm[867],"MANY");
+  gMC->Gspos("I200",12,"IS02",0.0,0.0,0.0,idrotm[869],"MANY");
+  gMC->Gspos("I200",11,"IS02",0.0,0.0,0.0,idrotm[870],"MANY");
+  gMC->Gspos("I200",10,"IS02",0.0,0.0,0.0,idrotm[871],"MANY");
+  gMC->Gspos("I200",9,"IS02",0.0,0.0,0.0,idrotm[872],"MANY");
+  gMC->Gspos("I200",8,"IS02",0.0,0.0,0.0,idrotm[873],"MANY");
+  gMC->Gspos("I200",7,"IS02",0.0,0.0,0.0,idrotm[874],"MANY");
+  gMC->Gspos("I200",6,"IS02",0.0,0.0,0.0,idrotm[875],"MANY");
+  gMC->Gspos("I200",5,"IS02",0.0,0.0,0.0,idrotm[876],"MANY");
+  gMC->Gspos("I090",2,"IS02",0.0,0.0,-39.4,0,"ONLY");    
+  gMC->Gspos("I090",1,"IS02",0.0,0.0,39.4,idrotm[856],"ONLY");  
+  gMC->Gspos("I099",9,"IS02",0.0,0.0,0.0,idrotm[877],"ONLY");
+  gMC->Gspos("I099",8,"IS02",0.0,0.0,0.0,idrotm[879],"ONLY");
+  gMC->Gspos("I099",1,"IS02",0.0,0.0,0.0,idrotm[880],"ONLY");
+  gMC->Gspos("I099",12,"IS02",0.0,0.0,0.0,idrotm[881],"ONLY");
+  gMC->Gspos("I099",11,"IS02",0.0,0.0,0.0,idrotm[851],"ONLY");
+  gMC->Gspos("I099",10,"IS02",0.0,0.0,0.0,idrotm[882],"ONLY");
+  gMC->Gspos("I200",23,"IS02",0.0,0.0,0.0,idrotm[898],"ONLY");
+  gMC->Gspos("I200",24,"IS02",0.0,0.0,0.0,idrotm[883],"ONLY");
+  gMC->Gspos("I200",1,"IS02",0.0,0.0,0.0,idrotm[884],"ONLY");
+  gMC->Gspos("I200",14,"IS02",0.0,0.0,0.0,idrotm[885],"ONLY");
+  gMC->Gspos("I200",15,"IS02",0.0,0.0,0.0,idrotm[887],"ONLY");
+  gMC->Gspos("I200",16,"IS02",0.0,0.0,0.0,idrotm[888],"ONLY");
+  gMC->Gspos("I200",17,"IS02",0.0,0.0,0.0,idrotm[889],"ONLY");
+  gMC->Gspos("I200",18,"IS02",0.0,0.0,0.0,idrotm[890],"ONLY");
+  gMC->Gspos("I200",22,"IS02",0.0,0.0,0.0,idrotm[891],"ONLY");
+  gMC->Gspos("I200",21,"IS02",0.0,0.0,0.0,idrotm[892],"ONLY");
+  gMC->Gspos("I200",20,"IS02",0.0,0.0,0.0,idrotm[868],"ONLY");
+  gMC->Gspos("I200",19,"IS02",0.0,0.0,0.0,idrotm[893],"ONLY");
+  gMC->Gspos("I098",1,"IS02",0.0,0.0,33.6,0,"ONLY");    
+  gMC->Gspos("I097",1,"IS02",0.0,0.0,26.6,0,"ONLY");    
+  gMC->Gspos("I097",2,"IS02",0.0,0.0,-26.6,idrotm[856],"ONLY");  
+  gMC->Gspos("I098",2,"IS02",0.0,0.0,-33.6,idrotm[856],"ONLY");  
+  gMC->Gspos("I202",1,"IS02",12.1,0.0,33.84,0,"ONLY");
+  gMC->Gspos("I202",6,"IS02",-6.05,-10.4789,33.84,idrotm[930],"ONLY");
+  gMC->Gspos("I202",5,"IS02",-6.05,10.4789,33.84,idrotm[929],"ONLY");
+  gMC->Gspos("I202",2,"IS02",12.1,0.0,-33.84,idrotm[856],"ONLY");
+  gMC->Gspos("I202",3,"IS02",-6.05,10.4789,-33.84,idrotm[932],"ONLY");
+  gMC->Gspos("I202",4,"IS02",-6.05,-10.4789,-33.84,idrotm[934],"ONLY");
+  gMC->Gspos("I203",12,"IS02",21.8453,0.0,-42.24,idrotm[856],"ONLY");
+  gMC->Gspos("I203",11,"IS02",10.9227,-18.9186,-42.24,idrotm[935],"ONLY");
+  gMC->Gspos("I203",10,"IS02",10.9227,-18.9186,42.24,idrotm[846],"ONLY");
+  gMC->Gspos("I203",9,"IS02",-10.9227,-18.9186,-42.24,idrotm[934],"ONLY");
+  gMC->Gspos("I203",8,"IS02",-10.9227,-18.9186,42.24,idrotm[930],"ONLY");
+  gMC->Gspos("I203",7,"IS02",-21.8453,0.0,-42.24,idrotm[933],"ONLY");
+  gMC->Gspos("I203",6,"IS02",-21.8453,0.0,42.24,idrotm[878],"ONLY");
+  gMC->Gspos("I203",5,"IS02",-10.9227,18.9186,-42.24,idrotm[932],"ONLY");
+  gMC->Gspos("I203",4,"IS02",-10.9227,18.9186,42.24,idrotm[929],"ONLY");
+  gMC->Gspos("I203",3,"IS02",10.9227,18.9186,-42.24,idrotm[931],"ONLY");
+  gMC->Gspos("I203",2,"IS02",10.9227,18.9186,42.24,idrotm[853],"ONLY");
+  gMC->Gspos("I203",1,"IS02",21.8453,0.0,42.24,0,"ONLY");
+  gMC->Gspos("I095",1,"I098",0.0,0.0,0.0,0,"ONLY");
+  gMC->Gspos("I096",23,"I098",22.77,0.0,0.0,idrotm[894],"MANY");
+  gMC->Gspos("I096",14,"I098",22.3754,6.57,0.0,idrotm[895],"MANY");
+  gMC->Gspos("I096",3,"I098",19.1553,12.3104,0.0,idrotm[896],"MANY");
+  gMC->Gspos("I096",16,"I098",15.2714,17.6241,0.0,idrotm[897],"MANY");
+  gMC->Gspos("I096",5,"I098",9.459,20.7123,0.0,idrotm[899],"MANY");
+  gMC->Gspos("I096",18,"I098",3.3188,23.0826,0.0,idrotm[900],"MANY");
+  gMC->Gspos("I096",7,"I098",-3.2405,22.5382,0.0,idrotm[901],"MANY");
+  gMC->Gspos("I096",20,"I098",-9.6875,21.2126,0.0,idrotm[902],"MANY");
+  gMC->Gspos("I096",9,"I098",-14.9112,17.2084,0.0,idrotm[903],"MANY");
+  gMC->Gspos("I096",22,"I098",-19.618,12.6077,0.0,idrotm[904],"MANY");
+  gMC->Gspos("I096",11,"I098",-21.8477,6.4151,0.0,idrotm[905],"MANY");
+  gMC->Gspos("I096",24,"I098",-23.32,0.0,0.0,idrotm[906],"MANY");
+  gMC->Gspos("I096",13,"I098",-21.8477,-6.4151,0.0,idrotm[907],"MANY");
+  gMC->Gspos("I096",4,"I098",-19.618,-12.6077,0.0,idrotm[908],"MANY");
+  gMC->Gspos("I096",15,"I098",-14.9112,-17.2084,0.0,idrotm[909],"MANY");
+  gMC->Gspos("I096",6,"I098",-9.6875,-21.2126,0.0,idrotm[910],"MANY");
+  gMC->Gspos("I096",17,"I098",-3.2405,-22.5382,0.0,idrotm[911],"MANY");
+  gMC->Gspos("I096",8,"I098",3.3188,-23.0826,0.0,idrotm[912],"MANY");
+  gMC->Gspos("I096",19,"I098",9.459,-20.7123,0.0,idrotm[913],"MANY");
+  gMC->Gspos("I096",10,"I098",15.2714,-17.6241,0.0,idrotm[914],"MANY");
+  gMC->Gspos("I096",21,"I098",19.1553,-12.3104,0.0,idrotm[915],"MANY");
+  gMC->Gspos("I096",12,"I098",22.3754,-6.57,0.0,idrotm[916],"MANY");
+  gMC->Gspos("I094",1,"I097",0.0,0.0,0.0,0,"ONLY");
+  gMC->Gspos("I096",1,"I097",13.87,0.0,0.0,idrotm[894],"MANY");
+  gMC->Gspos("I096",32,"I097",13.037,6.2783,0.0,idrotm[917],"MANY");
+  gMC->Gspos("I096",25,"I097",8.6478,10.844,0.0,idrotm[918],"MANY");
+  gMC->Gspos("I096",34,"I097",3.2199,14.1072,0.0,idrotm[919],"MANY");
+  gMC->Gspos("I096",27,"I097",-3.0864,13.5223,0.0,idrotm[920],"MANY");
+  gMC->Gspos("I096",36,"I097",-9.0219,11.3131,0.0,idrotm[921],"MANY");
+  gMC->Gspos("I096",29,"I097",-12.4964,6.018,0.0,idrotm[922],"MANY");
+  gMC->Gspos("I096",2,"I097",-14.47,0.0,0.0,idrotm[906],"MANY");
+  gMC->Gspos("I096",31,"I097",-12.4964,-6.018,0.0,idrotm[923],"MANY");
+  gMC->Gspos("I096",26,"I097",-9.0219,-11.3131,0.0,idrotm[924],"MANY");
+  gMC->Gspos("I096",33,"I097",-3.0864,-13.5223,0.0,idrotm[925],"MANY");
+  gMC->Gspos("I096",28,"I097",3.2199,-14.1072,0.0,idrotm[926],"MANY");
+  gMC->Gspos("I096",35,"I097",8.6478,-10.844,0.0,idrotm[927],"MANY");
+  gMC->Gspos("I096",30,"I097",13.037,-6.2783,0.0,idrotm[928],"MANY");
+  
+  
+  // --- Place volumes of SSD cone ----------------------------------    
 
+    
+  gMC->Gspos("I212",2,"IS01",0.0,0.0,0.0,idrotm[701],"MANY");
+  gMC->Gspos("I212",1,"IS01",0.0,0.0,0.0,0,"MANY");
+  gMC->Gspos("I211",1,"IS01",0.0,0.0,-56.5,0,"ONLY");
+  gMC->Gspos("I217",1,"IS01",0.0,0.0,-44.4,0,"ONLY");             // this will change after PPR to be symmetric
+  gMC->Gspos("I219",1,"IS01",0.0,0.0,-50.25,0,"ONLY");            // this will change after PPR to be symmetric
+  gMC->Gspos("I211",2,"IS01",0.0,0.0,56.5,idrotm[701],"ONLY");   
+  gMC->Gspos("I219",2,"IS01",0.0,0.0,51.65,idrotm[701],"ONLY");   // this will change after PPR to be symmetric
+  gMC->Gspos("I217",2,"IS01",0.0,0.0,45.8,idrotm[701],"ONLY");    // this will change after PPR to be symmetric
+  gMC->Gspos("I214",2,"IS01",0.0,0.0,67.25,idrotm[701],"ONLY");   
+  gMC->Gspos("I213",2,"IS01",0.0,0.0,62.25,idrotm[701],"ONLY");  
+  gMC->Gspos("I213",1,"IS01",0.0,0.0,-62.25,0,"ONLY");             
+  gMC->Gspos("I214",1,"IS01",0.0,0.0,-67.25,0,"ONLY");           
+  gMC->Gspos("I215",19,"IS01",0.0,0.0,0.0,idrotm[702],"MANY");
+  gMC->Gspos("I215",21,"IS01",0.0,0.0,0.0,idrotm[703],"MANY");
+  gMC->Gspos("I215",23,"IS01",0.0,0.0,0.0,idrotm[704],"MANY");
+  gMC->Gspos("I215",24,"IS01",0.0,0.0,0.0,idrotm[705],"MANY");
+  gMC->Gspos("I215",3,"IS01",0.0,0.0,0.0,idrotm[706],"MANY");
+  gMC->Gspos("I215",5,"IS01",0.0,0.0,0.0,idrotm[707],"MANY");
+  gMC->Gspos("I215",7,"IS01",0.0,0.0,0.0,idrotm[708],"MANY");
+  gMC->Gspos("I215",9,"IS01",0.0,0.0,0.0,idrotm[709],"MANY");
+  gMC->Gspos("I215",11,"IS01",0.0,0.0,0.0,idrotm[710],"MANY");
+  gMC->Gspos("I215",13,"IS01",0.0,0.0,0.0,idrotm[711],"MANY");
+  gMC->Gspos("I215",15,"IS01",0.0,0.0,0.0,idrotm[712],"MANY");
+  gMC->Gspos("I215",17,"IS01",0.0,0.0,0.0,idrotm[713],"MANY");
+  gMC->Gspos("I216",9,"IS01",0.0,0.0,45.5,idrotm[714],"ONLY");
+  gMC->Gspos("I216",11,"IS01",0.0,0.0,45.5,idrotm[715],"ONLY");
+  gMC->Gspos("I216",12,"IS01",0.0,0.0,45.5,idrotm[716],"ONLY");
+  gMC->Gspos("I216",3,"IS01",0.0,0.0,45.5,idrotm[717],"ONLY");
+  gMC->Gspos("I216",5,"IS01",0.0,0.0,45.5,idrotm[718],"ONLY");
+  gMC->Gspos("I216",7,"IS01",0.0,0.0,45.5,idrotm[719],"ONLY");
+  gMC->Gspos("I216",10,"IS01",0.0,0.0,-44,idrotm[720],"ONLY");
+  gMC->Gspos("I216",1,"IS01",0.0,0.0,-44,idrotm[721],"ONLY");
+  gMC->Gspos("I216",2,"IS01",0.0,0.0,-44,idrotm[722],"ONLY");
+  gMC->Gspos("I216",4,"IS01",0.0,0.0,-44,idrotm[723],"ONLY");
+  gMC->Gspos("I216",6,"IS01",0.0,0.0,-44,idrotm[724],"ONLY");
+  gMC->Gspos("I216",8,"IS01",0.0,0.0,-44,idrotm[725],"ONLY");
+  gMC->Gspos("I215",1,"IS01",0.0,0.0,0.0,idrotm[726],"MANY");
+  gMC->Gspos("I215",2,"IS01",0.0,0.0,0.0,idrotm[727],"MANY");
+  gMC->Gspos("I215",4,"IS01",0.0,0.0,0.0,idrotm[728],"MANY");
+  gMC->Gspos("I215",6,"IS01",0.0,0.0,0.0,idrotm[729],"MANY");
+  gMC->Gspos("I215",8,"IS01",0.0,0.0,0.0,idrotm[733],"MANY");
+  gMC->Gspos("I215",10,"IS01",0.0,0.0,0.0,idrotm[730],"MANY");
+  gMC->Gspos("I215",12,"IS01",0.0,0.0,0.0,idrotm[731],"MANY");
+  gMC->Gspos("I215",14,"IS01",0.0,0.0,0.0,idrotm[768],"MANY");
+  gMC->Gspos("I215",16,"IS01",0.0,0.0,0.0,idrotm[732],"MANY");
+  gMC->Gspos("I215",18,"IS01",0.0,0.0,0.0,idrotm[734],"MANY");
+  gMC->Gspos("I215",20,"IS01",0.0,0.0,0.0,idrotm[798],"MANY");
+  gMC->Gspos("I215",22,"IS01",0.0,0.0,0.0,idrotm[735],"MANY");
+           
+                   
+  // --- Place subdetectors' mother volumes and supports' mother volumes
+  //     into ITS mother volume ITSD
+    
+  gMC->Gspos("IT12",1,"ITSD",0.0,0.0,0.0,0,"ONLY");  // SPD mother volume
+  gMC->Gspos("IT34",1,"ITSD",0.0,0.0,0.0,0,"ONLY");  // SDD mother volume
+  gMC->Gspos("IT56",1,"ITSD",0.0,0.0,0.0,0,"ONLY");  // SSD mother volume
+  gMC->Gspos("IS02",1,"ITSD",0.0,0.0,0.0,0,"ONLY");  // SDD cones/supports
+  gMC->Gspos("IS01",1,"ITSD",0.0,0.0,0.0,0,"ONLY");  // SSD cones/supports
+        
 
+  // ****************************  SERVICES  *********************************
 
+   // --- DEFINE CABLES AT THE END OF THE ITS CONES - COPPER PART
+  //     UPPER PART
 
-  // SERVICES
+  dgh[0] = 46.;    
+  dgh[1] = 46.+1.0;  
+  dgh[2] = 9.5;
+  dgh[3] = 12.;
+  dgh[4] = 168.;
   
+  gMC->Gsvolu("I1CU", "TUBS", idtmed[213], dgh, 5);  
+  gMC->Gspos("I1CU", 1, "ITSV", 0., 0., 83.5, 0, "ONLY");
+  gMC->Gspos("I1CU", 2, "ITSV", 0., 0., -83.5, idrotm[200], "ONLY");
   
   // --- DEFINE CABLES AT THE END OF THE ITS CONES - COPPER PART
+  //     LOWER PART
+
+  dgh[0] = 46.;    
+  dgh[1] = 46.+1.0;  
+  dgh[2] = 9.5;
+  dgh[3] = 192.;
+  dgh[4] = 348.;
   
-  dgh[0] = 45.;
-  dgh[1] = 45.+1.0;
+  gMC->Gsvolu("I2CU", "TUBS", idtmed[213], dgh, 5);  
+  gMC->Gspos("I2CU", 1, "ITSV", 0., 0., 83.5, 0, "ONLY");
+  gMC->Gspos("I2CU", 2, "ITSV", 0., 0., -83.5, idrotm[200], "ONLY");
+
+
+  // --- DEFINE CABLES AT THE END OF THE ITS CONES - CARBON PART
+  //     UPPER PART
+  
+  dgh[0] = 46.+1.0;  
+  dgh[1] = 46.+1.0+1.5;   
   dgh[2] = 9.5;
+  dgh[3] = 12.;
+  dgh[4] = 168.;
   
-  gMC->Gsvolu("ICCU", "TUBE", idtmed[279], dgh, 3);  
-  gMC->Gspos("ICCU", 1, "ITSV", 0., 0., 86.7, 0, "ONLY");
-  gMC->Gspos("ICCU", 2, "ITSV", 0., 0., -86.7, idrotm[200], "ONLY");
+  gMC->Gsvolu("I1CC", "TUBS", idtmed[225], dgh, 5);  
+  gMC->Gspos("I1CC", 1, "ITSV", 0., 0., 83.5, 0, "ONLY");
+  gMC->Gspos("I1CC", 2, "ITSV", 0., 0., -83.5, idrotm[200], "ONLY");  
   
   // --- DEFINE CABLES AT THE END OF THE ITS CONES - CARBON PART
+  //     LOWER PART
   
-  dgh[0] = 45.+1.0;
-  dgh[1] = 45.+1.0+1.5;
+  dgh[0] = 46.+1.0;  
+  dgh[1] = 46.+1.0+1.5;   
   dgh[2] = 9.5;
+  dgh[3] = 192.;
+  dgh[4] = 348.;
   
-  gMC->Gsvolu("ICCC", "TUBE", idtmed[274], dgh, 3);  
-  gMC->Gspos("ICCC", 1, "ITSV", 0., 0., 86.7, 0, "ONLY");
-  gMC->Gspos("ICCC", 2, "ITSV", 0., 0., -86.7, idrotm[200], "ONLY");  
+  gMC->Gsvolu("I2CC", "TUBS", idtmed[225], dgh, 5);  
+  gMC->Gspos("I2CC", 1, "ITSV", 0., 0., 83.5, 0, "ONLY");
+  gMC->Gspos("I2CC", 2, "ITSV", 0., 0., -83.5, idrotm[200], "ONLY");  
+
+
+  // --- DEFINE PATCH PANELS AT THE END OF THE ITS CONES
+  //     UPPER PART
+  
+  dgh[0] = 46.;  
+  dgh[1] = 56.;
+  dgh[2] = 2.25;
+  dgh[3] = 12.;
+  dgh[4] = 168.;
+  
+  gMC->Gsvolu("IPA1", "TUBS", idtmed[210], dgh, 5);  
+  gMC->Gspos("IPA1", 1, "ITSV", 0., 0., 95.25, 0, "ONLY");  
+  gMC->Gspos("IPA1", 2, "ITSV", 0., 0., -95.25, idrotm[200], "ONLY"); 
   
   // --- DEFINE PATCH PANELS AT THE END OF THE ITS CONES
+  //     LOWER PART
   
-  dgh[0] = 45.;
+  dgh[0] = 46.;  
   dgh[1] = 56.;
   dgh[2] = 2.25;
+  dgh[3] = 192.;
+  dgh[4] = 348.;
   
-  gMC->Gsvolu("IPAN", "TUBE", idtmed[285], dgh, 3);  
-  gMC->Gspos("IPAN", 1, "ITSV", 0., 0., 98.45, 0, "ONLY");  
-  gMC->Gspos("IPAN", 2, "ITSV", 0., 0., -98.45, idrotm[200], "ONLY"); 
+  gMC->Gsvolu("IPA2", "TUBS", idtmed[210], dgh, 5);  
+  gMC->Gspos("IPA2", 1, "ITSV", 0., 0., 95.25, 0, "ONLY");  
+  gMC->Gspos("IPA2", 2, "ITSV", 0., 0., -95.25, idrotm[200], "ONLY"); 
   
   // --- DEFINE CABLES/COOLING BELOW THE TPC - COPPER PART - UPPER PART
  
-  dgh[0] = (xltpc-100.7)/2.;
-  dgh[1] = 45.2;
-  dgh[2] = 45.2+1.0;
-  dgh[3] = 61.8;
-  dgh[4] = 61.8+1.0;
+  dgh[0] = (ztpc-97.5)/2.;
+  dgh[1] = 46.2;
+  dgh[2] = 46.2+1.0;
+  dgh[3] = 62.3;
+  dgh[4] = 62.3+1.0;
   dgh[5] = 12.;    
   dgh[6] = 168.;
-  gMC->Gsvolu("ICU1", "CONS", idtmed[279], dgh, 7);    
-  gMC->Gspos("ICU1", 1, "ITSV", 0., 0., 100.7+dgh[0], 0, "ONLY");  
-  gMC->Gspos("ICU1", 2, "ITSV", 0., 0., -(100.7+dgh[0]), idrotm[200], "ONLY");   
+  gMC->Gsvolu("ICU1", "CONS", idtmed[213], dgh, 7);    
+  gMC->Gspos("ICU1", 1, "ITSV", 0., 0., 97.5+dgh[0], 0, "ONLY");  
+  gMC->Gspos("ICU1", 2, "ITSV", 0., 0., -(97.5+dgh[0]), idrotm[200], "ONLY");   
   
   // --- DEFINE CABLES/COOLING BELOW THE TPC - COPPER PART - LOWER PART
   
-  dgh[0] = (xltpc-100.7)/2.;
-  dgh[1] = 45.2;
-  dgh[2] = 45.2+1.0;
-  dgh[3] = 61.8;
-  dgh[4] = 61.8+1.0;
+  dgh[0] = (ztpc-97.5)/2.;
+  dgh[1] = 46.2;
+  dgh[2] = 46.2+1.0;
+  dgh[3] = 62.3;
+  dgh[4] = 62.3+1.0;
   dgh[5] = 192.;    
   dgh[6] = 348.;
-  gMC->Gsvolu("ICU2", "CONS", idtmed[279], dgh, 7);    
-  gMC->Gspos("ICU2", 1, "ITSV", 0., 0., 100.7+dgh[0], 0, "ONLY");  
-  gMC->Gspos("ICU2", 2, "ITSV", 0., 0., -(100.7+dgh[0]), idrotm[200], "ONLY");     
+  gMC->Gsvolu("ICU2", "CONS", idtmed[213], dgh, 7);    
+  gMC->Gspos("ICU2", 1, "ITSV", 0., 0., 97.5+dgh[0], 0, "ONLY");  
+  gMC->Gspos("ICU2", 2, "ITSV", 0., 0., -(97.5+dgh[0]), idrotm[200], "ONLY");     
   
   // --- DEFINE CABLES/COOLING BELOW THE TPC - CARBON PART - UPPER PART
   
-  dgh[0] = (xltpc-100.7)/2.;
-  dgh[1] = 45.2+1.0;
-  dgh[2] = 45.2+1.0+1.5;
-  dgh[3] = 61.8+1.0;
-  dgh[4] = 61.8+1.0+1.5;
+  dgh[0] = (ztpc-97.5)/2.;
+  dgh[1] = 46.2+1.0;
+  dgh[2] = 46.2+1.0+1.5;
+  dgh[3] = 62.3+1.0;
+  dgh[4] = 62.3+1.0+1.5;
   dgh[5] = 12.;    
   dgh[6] = 168.;  
-  gMC->Gsvolu("ICC1", "CONS", idtmed[274], dgh, 7);    
-  gMC->Gspos("ICC1", 1, "ITSV", 0., 0., 100.7+dgh[0], 0, "ONLY");  
-  gMC->Gspos("ICC1", 2, "ITSV", 0., 0., -(100.7+dgh[0]), idrotm[200], "ONLY");   
+  gMC->Gsvolu("ICC1", "CONS", idtmed[225], dgh, 7);    
+  gMC->Gspos("ICC1", 1, "ITSV", 0., 0., 97.5+dgh[0], 0, "ONLY");  
+  gMC->Gspos("ICC1", 2, "ITSV", 0., 0., -(97.5+dgh[0]), idrotm[200], "ONLY");   
   
   // --- DEFINE CABLES/COOLING BELOW THE TPC - CARBON PART - LOWER PART
   
-  dgh[0] = (xltpc-100.7)/2.;
-  dgh[1] = 45.2+1.0;
-  dgh[2] = 45.2+1.0+1.5;
-  dgh[3] = 61.8+1.0;
-  dgh[4] = 61.8+1.0+1.5;
+  dgh[0] = (ztpc-97.5)/2.;
+  dgh[1] = 46.2+1.0;
+  dgh[2] = 46.2+1.0+1.5;
+  dgh[3] = 62.3+1.0;
+  dgh[4] = 62.3+1.0+1.5;
   dgh[5] = 192.;    
   dgh[6] = 348.;  
-  gMC->Gsvolu("ICC2", "CONS", idtmed[274], dgh, 7);    
-  gMC->Gspos("ICC2", 1, "ITSV", 0., 0., 100.7+dgh[0], 0, "ONLY");  
-  gMC->Gspos("ICC2", 2, "ITSV", 0., 0., -(100.7+dgh[0]), idrotm[200], "ONLY");     
+  gMC->Gsvolu("ICC2", "CONS", idtmed[225], dgh, 7);    
+  gMC->Gspos("ICC2", 1, "ITSV", 0., 0., 97.5+dgh[0], 0, "ONLY");  
+  gMC->Gspos("ICC2", 2, "ITSV", 0., 0., -(97.5+dgh[0]), idrotm[200], "ONLY");     
     
   // --- DEFINE CABLES/COOLING BEHIND THE TPC - COPPER PART - UPPER PART
     
-  dgh[0] = 62.5;
+  dgh[0] = 62.1;
   dgh[1] = 74.5;
   dgh[2] = 0.5;
   dgh[3] = 12.;
   dgh[4] = 168.;
-  gMC->Gsvolu("ICU3", "TUBS", idtmed[279], dgh, 5);    
-  gMC->Gspos("ICU3", 1, "ITSV", 0., 0., xltpc+1.5+dgh[2], 0, "ONLY");  
-  gMC->Gspos("ICU3", 2, "ITSV", 0., 0., -(xltpc+1.5+dgh[2]), idrotm[200], "ONLY");      
+  gMC->Gsvolu("ICU3", "TUBS", idtmed[213], dgh, 5);    
+  gMC->Gspos("ICU3", 1, "ITSV", 0., 0., ztpc+1.5+dgh[2], 0, "ONLY");  
+  gMC->Gspos("ICU3", 2, "ITSV", 0., 0., -(ztpc+1.5+dgh[2]), idrotm[200], "ONLY");      
   
   // --- DEFINE CABLES/COOLING BEHIND THE TPC - COPPER PART - LOWER PART
   
-  dgh[0] = 62.5;
+  dgh[0] = 62.1;
   dgh[1] = 74.5;
   dgh[2] = 0.5;
   dgh[3] = 192.;
   dgh[4] = 348.;
-  gMC->Gsvolu("ICU4", "TUBS", idtmed[279], dgh, 5);    
-  gMC->Gspos("ICU4", 1, "ITSV", 0., 0., xltpc+1.5+dgh[2], 0, "ONLY");  
-  gMC->Gspos("ICU4", 2, "ITSV", 0., 0., -(xltpc+1.5+dgh[2]), idrotm[200], "ONLY");      
+  gMC->Gsvolu("ICU4", "TUBS", idtmed[213], dgh, 5);    
+  gMC->Gspos("ICU4", 1, "ITSV", 0., 0., ztpc+1.5+dgh[2], 0, "ONLY");  
+  gMC->Gspos("ICU4", 2, "ITSV", 0., 0., -(ztpc+1.5+dgh[2]), idrotm[200], "ONLY");      
      
   // --- DEFINE CABLES/COOLING BEHIND THE TPC - CARBON PART - UPPER PART
 
-  dgh[0] = 62.5;
+  dgh[0] = 62.1;
   dgh[1] = 74.5;
   dgh[2] = 0.75;
   dgh[3] = 12.;
   dgh[4] = 168.;
-  gMC->Gsvolu("ICC3", "TUBS", idtmed[274], dgh, 5);    
-  gMC->Gspos("ICC3", 1, "ITSV", 0., 0., xltpc+dgh[2], 0, "ONLY");  
-  gMC->Gspos("ICC3", 2, "ITSV", 0., 0., -(xltpc+dgh[2]), idrotm[200], "ONLY"); 
+  gMC->Gsvolu("ICC3", "TUBS", idtmed[225], dgh, 5);    
+  gMC->Gspos("ICC3", 1, "ITSV", 0., 0., ztpc+dgh[2], 0, "ONLY");  
+  gMC->Gspos("ICC3", 2, "ITSV", 0., 0., -(ztpc+dgh[2]), idrotm[200], "ONLY"); 
     
   // --- DEFINE CABLES/COOLING BEHIND THE TPC - CARBON PART - LOWER PART
 
-  dgh[0] = 62.5;
+  dgh[0] = 62.1;
   dgh[1] = 74.5;
   dgh[2] = 0.75;
   dgh[3] = 192.;
   dgh[4] = 348.;
-  gMC->Gsvolu("ICC4", "TUBS", idtmed[274], dgh, 5);    
-  gMC->Gspos("ICC4", 1, "ITSV", 0., 0., xltpc+dgh[2], 0, "ONLY");  
-  gMC->Gspos("ICC4", 2, "ITSV", 0., 0., -(xltpc+dgh[2]), idrotm[200], "ONLY"); 
+  gMC->Gsvolu("ICC4", "TUBS", idtmed[225], dgh, 5);    
+  gMC->Gspos("ICC4", 1, "ITSV", 0., 0., ztpc+dgh[2], 0, "ONLY");  
+  gMC->Gspos("ICC4", 2, "ITSV", 0., 0., -(ztpc+dgh[2]), idrotm[200], "ONLY"); 
 
   // --- DEFINE HOOK TO THE TPC ON OTHER SIDE W.R.T. THE ABSORBER - UPPER PART
   
@@ -2372,8 +4167,8 @@ void AliITSvPPRsymm::CreateGeometry(){
   dgh[2] = 2.5;
   dgh[3] = 12.;
   dgh[4] = 168.;
-  gMC->Gsvolu("IHK1", "TUBS", idtmed[284], dgh, 5);   
-  gMC->Gspos("IHK1", 1, "ITSV", 0., 0., -xltpc-dgh[2], 0, "ONLY");      
+  gMC->Gsvolu("IHK1", "TUBS", idtmed[264], dgh, 5);   
+  gMC->Gspos("IHK1", 1, "ITSV", 0., 0., -ztpc-dgh[2], 0, "ONLY");      
   
   // --- DEFINE HOOK TO THE TPC ON OTHER SIDE W.R.T. THE ABSORBER - LOWER PART
   
@@ -2382,516 +4177,86 @@ void AliITSvPPRsymm::CreateGeometry(){
   dgh[2] = 2.5;
   dgh[3] = 192.;
   dgh[4] = 348.;
-  gMC->Gsvolu("IHK2", "TUBS", idtmed[284], dgh, 5);   
-  gMC->Gspos("IHK2", 1, "ITSV", 0., 0., -xltpc-dgh[2], 0, "ONLY");        
+  gMC->Gsvolu("IHK2", "TUBS", idtmed[264], dgh, 5);   
+  gMC->Gspos("IHK2", 1, "ITSV", 0., 0., -ztpc-dgh[2], 0, "ONLY");        
   
   // --- DEFINE RAILS BETWEEN THE ITS AND THE TPC
   
-  //dgh[0] = 0.85;
-  //dgh[1] = 10.;
-  //dgh[2] = 190.;  
-  //gMC->Gsvolu("IRAI", "BOX ", idtmed[285], dgh, 3);   
-  //gMC->Gspos("IRAI", 1, "ITSV", 53., 0., -69.5, 0, "ONLY");
-  //gMC->Gspos("IRAI", 2, "ITSV", -53., 0., -69.5, 0, "ONLY");        
+  if (rails == 1) {
+  
+     dgh[0] = 2.;          
+     dgh[1] = 8.;           
+     dgh[2] = 190.;         
+     gMC->Gsvolu("IRA1", "BOX ", idtmed[268], dgh, 3);
+     gMC->Gspos("IRA1", 1, "ITSV", 53.5, 0., -69.5, 0, "ONLY");   
+     gMC->Gsvolu("IRA2", "BOX ", idtmed[268], dgh, 3);    
+     gMC->Gspos("IRA2", 1, "ITSV", -53.5, 0., -69.5, 0, "ONLY");    
+
+     dgh[0] = 2.-0.5;    // 0.5 was determined in such a way that the aluminum area is 20.9 cm^2      
+     dgh[1] = 8.-0.5;    // 0.5 was determined in such a way that the aluminum area is 20.9 cm^2       
+     dgh[2] = 190.;         
+     gMC->Gsvolu("IRA3", "BOX ", idtmed[205], dgh, 3);   
+     gMC->Gspos("IRA3", 1, "IRA1", 0., 0., 0., 0, "ONLY");   
+     gMC->Gsvolu("IRA4", "BOX ", idtmed[205], dgh, 3);     
+     gMC->Gspos("IRA4", 1, "IRA2", 0., 0., 0., 0, "ONLY");    
+
+  }
   
   // --- DEFINE CYLINDERS HOLDING RAILS BETWEEN THE ITS AND THE TPC
   
-
-  dgh[0] = 58.;
+  dgh[0] = 56.9;    
   dgh[1] = 59.;
-  dgh[2] = 0.6;   
-  gMC->Gsvolu("ICYL", "TUBE", idtmed[285], dgh, 3);   
-  gMC->Gspos("ICYL", 1, "ALIC", 0., 0., 74., 0, "ONLY");
-  gMC->Gspos("ICYL", 2, "ALIC", 0., 0., -74., idrotm[200], "ONLY");     
+  dgh[2] = 0.6;    
+  gMC->Gsvolu("ICYL", "TUBE", idtmed[210], dgh, 3);   
+  gMC->Gspos("ICYL", 1, "ALIC", 0., 0., 74.1, 0, "ONLY");       
+  gMC->Gspos("ICYL", 2, "ALIC", 0., 0., -74.1, idrotm[200], "ONLY");  
+
+  // --- DEFINE SUPPORTS FOR RAILS ATTACHED TO THE CYLINDERS
+
+  dgh[0] = 0.;        
+  dgh[1] = 3.;         
+  dgh[2] = 5.;  // 5. comes from the fact that the volume has to be 567.6/2 cm^3       
+  gMC->Gsvolu("ISR1", "TUBE", idtmed[284], dgh, 3);   
+  gMC->Gspos("ISR1", 1, "ITSV", 53.4292, 10.7053, 79.75, 0, "ONLY");    
+  gMC->Gspos("ISR1", 2, "ITSV", 53.4292, -10.7053, 79.75, 0, "ONLY");   
+  gMC->Gspos("ISR1", 3, "ITSV", -53.4292, 10.7053, 79.75, 0, "ONLY"); 
+  gMC->Gspos("ISR1", 4, "ITSV", -53.4292, -10.7053, 79.75, 0, "ONLY");  
+  gMC->Gspos("ISR1", 5, "ITSV", 53.4292, 10.7053, -79.75, 0, "ONLY");   
+  gMC->Gspos("ISR1", 6, "ITSV", 53.4292, -10.7053, -79.75, 0, "ONLY");   
+  gMC->Gspos("ISR1", 7, "ITSV", -53.4292, 10.7053, -79.75, 0, "ONLY"); 
+  gMC->Gspos("ISR1", 8, "ITSV", -53.4292, -10.7053, -79.75, 0, "ONLY");        
+  
+  // --- DEFINE SUPPORTS FOR RAILS ATTACHED TO THE ABSORBER
+
+  dgh[0] = 5.;        
+  dgh[1] = 12.;         
+  dgh[2] = 5.;         
+  gMC->Gsvolu("ISR2", "BOX ", idtmed[210], dgh, 3);   
+  gMC->Gspos("ISR2", 1, "ALIC", 53.5, 0., 125.5, 0, "ONLY");
+  gMC->Gsvolu("ISR3", "BOX ", idtmed[210], dgh, 3);   
+  gMC->Gspos("ISR3", 1, "ALIC", -53.5, 0., 125.5, 0, "ONLY");  
+  
+  dgh[0] = 5.-2.;        
+  dgh[1] = 12.-2.;         
+  dgh[2] = 5.;         
+  gMC->Gsvolu("ISR4", "BOX ", idtmed[205], dgh, 3);   
+  gMC->Gspos("ISR4", 1, "ISR2", 0., 0., 0., 0, "ONLY");     
+  gMC->Gsvolu("ISR5", "BOX ", idtmed[205], dgh, 3);   
+  gMC->Gspos("ISR5", 1, "ISR3", 0., 0., 0., 0, "ONLY");
+  
+  // --- DEFINE SUPPORTS TO ATTACH THE ITS TO THE TPC
+  
+  dgh[0] = 0.;        
+  dgh[1] = 5.;         
+  dgh[2] = 2.;         
+  gMC->Gsvolu("ISR6", "TUBE", idtmed[210], dgh, 3);   
+  gMC->Gspos("ISR6", 1, "ALIC", 0., 54., 77., 0, "ONLY"); 
+  gMC->Gspos("ISR6", 2, "ALIC", 0., 54., -77., 0, "ONLY"); 
+  gMC->Gspos("ISR6", 3, "ALIC", 0., -54., -77., 0, "ONLY");       
   
   // --- Outputs the geometry tree in the EUCLID/CAD format 
   
-  if (fEuclidOut) {
+  if (GetEUCLID()) {
     gMC->WriteEuclid("ITSgeometry", "ITSV", 1, 5);
   }
 }
-//_____________________________________________________________________________
-void AliITSvPPRsymm::CreateMaterials(){
-////////////////////////////////////////////////////////////////////////
-  //
-  // Create ITS materials
-  //     This function defines the default materials used in the Geant
-  // Monte Carlo simulations for the geometries AliITSv1, AliITSv3,
-  // AliITSvPPRsymm, AliITSvPPRasymm.
-  // In general it is automatically replaced by
-  // the CreatMaterials routine defined in AliITSv?. Should the function
-  // CreateMaterials not exist for the geometry version you are using this
-  // one is used. See the definition found in AliITSv5 or the other routine
-  // for a complete definition.
-  //
-  // Water H2O
-  Float_t awat[2]  = { 1.00794,15.9994 };
-  Float_t zwat[2]  = { 1.,8. };
-  Float_t wwat[2]  = { 2.,1. };
-  Float_t denswat  = 1.;
-  // Freon
-  Float_t afre[2]  = { 12.011,18.9984032 };
-  Float_t zfre[2]  = { 6.,9. };
-  Float_t wfre[2]  = { 5.,12. };
-  Float_t densfre  = 1.5;
-  // Ceramics
-  //     94.4% Al2O3 , 2.8% SiO2 , 2.3% MnO , 0.5% Cr2O3 
-  Float_t acer[5]  = { 26.981539,15.9994,28.0855,54.93805,51.9961 };
-  Float_t zcer[5]  = { 13.,8.,14.,25.,     24. };
-  Float_t wcer[5]  = { .49976,1.01233,.01307,      .01782,.00342 };
-  Float_t denscer  = 3.6;
-  //
-  //     60% SiO2 , 40% G10FR4 
-  // PC board
-  Float_t apcb[3]  = { 28.0855,15.9994,17.749 };
-  Float_t zpcb[3]  = { 14.,8.,8.875 };
-  Float_t wpcb[3]  = { .28,.32,.4 };
-  Float_t denspcb  = 1.8;
-  // POLYETHYL
-  Float_t apoly[2] = { 12.01,1. };
-  Float_t zpoly[2] = { 6.,1. };
-  Float_t wpoly[2] = { .33,.67 };
-  // old SERVICES
-  Float_t zserv[4] = { 1.,6.,26.,29. };
-  Float_t aserv[4] = { 1.,12.,55.8,63.5 };
-  Float_t wserv[4] = { .014,.086,.42,.48 };
-  // Stainless steel
-  Float_t asteel[4] = { 55.847,51.9961,58.6934,28.0855 };
-  Float_t zsteel[4] = { 26.,24.,28.,14. };
-  Float_t wsteel[4] = { .715,.18,.1,.005 };
-  
-  
-  Int_t  isxfld  = gAlice->Field()->Integ();
-  Float_t sxmgmx = gAlice->Field()->Max();
-  
-  
-  // --- Define the various materials for GEANT --- 
-  
-  //  200-224 --> Silicon Pixel Detectors (detectors, chips, buses, cooling,..)
-  
-  AliMaterial(0, "SPD Si$",      28.0855, 14., 2.33, 9.36, 999);
-  AliMaterial(1, "SPD Si chip$", 28.0855, 14., 2.33, 9.36, 999);
-  AliMaterial(2, "SPD Si bus$",  28.0855, 14., 2.33, 9.36, 999);
-  AliMaterial(3, "SPD C$",       12.011,   6., 2.265,18.8, 999);
-  // v. dens 
-  AliMaterial(4, "SPD Air$",    14.61, 7.3, .001205, 30423., 999);
-  AliMaterial(5, "SPD Vacuum$", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
-  AliMaterial(6, "SPD Al$",     26.981539, 13., 2.6989, 8.9, 999);
-  AliMixture( 7, "SPD Water $", awat, zwat, denswat, -2, wwat);
-  AliMixture( 8, "SPD Freon$",  afre, zfre, densfre, -2, wfre);
-  AliMaterial(9, "SPD End ladder$", 55.845, 26., 7.87/10., 1.76*10., 999); 
-  //AliMaterial(9, "SPD End ladder$", 55.845, 26., -7.87/10., -1.76*10., 999); 
-  AliMaterial(10, "SPD cone$",28.0855, 14., 2.33, 9.36, 999);       // check !!!!
-  // ** 
-  AliMedium(0, "SPD Si$",       0, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(1, "SPD Si chip$",  1, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(2, "SPD Si bus$",   2, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(3, "SPD C$",        3, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(4, "SPD Air$",      4, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(5, "SPD Vacuum$",   5, 0,isxfld,sxmgmx, 10.,1.00, .1, .100,10.00);
-  AliMedium(6, "SPD Al$",       6, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(7, "SPD Water $",   7, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(8, "SPD Freon$",    8, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(9, "SPD End ladder",9, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(10, "SPD cone$",   10, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);   
-  
-  //  225-249 --> Silicon Drift Detectors (detectors, chips, buses, cooling,..)
-  
-  AliMaterial(25, "SDD Si$",      28.0855, 14., 2.33,  9.36, 999);
-  AliMaterial(26, "SDD Si chip$", 28.0855, 14., 2.33,  9.36, 999);
-  AliMaterial(27, "SDD Si bus$",  28.0855, 14., 2.33,  9.36, 999);
-  AliMaterial(28, "SDD C$",       12.011,   6., 2.265,18.8,  999);
-  // v. dens 
-  AliMaterial(29, "SDD Air$",     14.61, 7.3, .001205, 30423., 999);
-  AliMaterial(30, "SDD Vacuum$",  1e-16, 1e-16, 1e-16, 1e16,  1e16);
-  AliMaterial(31, "SDD Al$",      26.981539, 13., 2.6989, 8.9, 999);
-  // After a call with ratios by number (negative number of elements), 
-  // the ratio array is changed to the ratio by weight, so all successive 
-  // calls with the same array must specify the number of elements as 
-  // positive 
-  AliMixture(32, "SDD Water $", awat, zwat, denswat, 2, wwat);
-  // After a call with ratios by number (negative number of elements), 
-  // the ratio array is changed to the ratio by weight, so all successive 
-  // calls with the same array must specify the number of elements as 
-  // positive 
-  AliMixture( 33, "SDD Freon$", afre, zfre, densfre, 2, wfre);
-  AliMixture( 34, "SDD PCB$",   apcb, zpcb, denspcb, 3, wpcb);
-  AliMaterial(35, "SDD Copper$", 63.546, 29., 8.96, 1.43, 999);
-  AliMixture( 36, "SDD Ceramics$", acer, zcer, denscer, -5, wcer);
-  AliMaterial(37, "SDD Kapton$", 12.011, 6., 1.3, 31.27, 999);
-  AliMaterial(38, "SDD End ladder$", 69.9298, 29.8246, 0.3824, 36.5103, 999); 
-  AliMaterial(39, "SDD cone$", 63.546, 29., 1.15, 1.265, 999);  
-  //AliMaterial(38, "SDD End ladder$", 69.9298, 29.8246, -0.3824, -36.5103, 999); 
-  //AliMaterial(39, "SDD cone$", 63.546, 29., -1.15, -1.265, 999);         
-  // ** 
-  // check A and Z 
-  AliMedium(25, "SDD Si$",      25, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(26, "SDD Si chip$", 26, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(27, "SDD Si bus$",  27, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(28, "SDD C$",       28, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(29, "SDD Air$",     29, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(30, "SDD Vacuum$",  30, 0,isxfld,sxmgmx, 10.,1.00, .1, .100,10.00);
-  AliMedium(31, "SDD Al$",      31, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(32, "SDD Water $",  32, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(33, "SDD Freon$",   33, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(34, "SDD PCB$",     34, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(35, "SDD Copper$",  35, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(36, "SDD Ceramics$",36, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(37, "SDD Kapton$",  37, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(38, "SDD End ladder",38, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(39, "SDD cone$",   39, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  
-  //  250-274 --> Silicon Strip Detectors (detectors, chips, buses, cooling,..)
-  
-  AliMaterial(50, "SSD Si$",      28.0855, 14., 2.33, 9.36, 999.);
-  AliMaterial(51, "SSD Si chip$", 28.0855, 14., 2.33, 9.36, 999.);
-  AliMaterial(52, "SSD Si bus$",  28.0855, 14., 2.33, 9.36, 999.);
-  AliMaterial(53, "SSD C$",       12.011,   6., 2.265,18.8, 999.);
-  // v. dens 
-  AliMaterial(54, "SSD Air$",     14.61, 7.3, .001205, 30423., 999);
-  AliMaterial(55, "SSD Vacuum$",  1e-16, 1e-16, 1e-16, 1e16, 1e16);
-  AliMaterial(56, "SSD Al$",      26.981539, 13., 2.6989, 8.9, 999);
-  // After a call with ratios by number (negative number of elements), 
-  // the ratio array is changed to the ratio by weight, so all successive 
-  // calls with the same array must specify the number of elements as 
-  // positive 
-  AliMixture(57, "SSD Water $", awat, zwat, denswat, 2, wwat);
-  // After a call with ratios by number (negative number of elements), 
-  // the ratio array is changed to the ratio by weight, so all successive 
-  // calls with the same array must specify the number of elements as 
-  // positive 
-  AliMixture(58, "SSD Freon$", afre, zfre, densfre, 2, wfre);
-  AliMixture(59, "SSD PCB$",   apcb, zpcb, denspcb, 3, wpcb);
-  AliMaterial(60, "SSD Copper$", 63.546, 29., 8.96, 1.43, 999.);
-  // After a call with ratios by number (negative number of elements), 
-  // the ratio array is changed to the ratio by weight, so all successive 
-  // calls with the same array must specify the number of elements as 
-  // positive 
-  AliMixture( 61, "SSD Ceramics$", acer, zcer, denscer, 5, wcer);
-  AliMaterial(62, "SSD Kapton$", 12.011, 6., 1.3, 31.27, 999.);
-  // check A and Z 
-  AliMaterial(63, "SSD G10FR4$", 17.749, 8.875, 1.8, 21.822, 999.);
-  AliMaterial(64, "SSD End ladder$", 32.0988, 15.4021, 0.68, 35.3238, 999); 
-  AliMaterial(65, "SSD cone$",63.546, 29., 1.15, 1.265, 999);   
-  //AliMaterial(64, "SSD End ladder$", 32.0988, 15.4021, -0.68, -35.3238, 999); 
-  //AliMaterial(65, "SSD cone$",63.546, 29., -1.15, -1.265, 999);     
-  // ** 
-  AliMedium(50, "SSD Si$",      50, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(51, "SSD Si chip$", 51, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(52, "SSD Si bus$",  52, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(53, "SSD C$",       53, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(54, "SSD Air$",     54, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(55, "SSD Vacuum$",  55, 0,isxfld,sxmgmx, 10.,1.00, .1, .100,10.00);
-  AliMedium(56, "SSD Al$",      56, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(57, "SSD Water $",  57, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(58, "SSD Freon$",   58, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(59, "SSD PCB$",     59, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(60, "SSD Copper$",  60, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(61, "SSD Ceramics$",61, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(62, "SSD Kapton$",  62, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(63, "SSD G10FR4$",  63, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(64, "SPD End ladder",64, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(65, "SPD cone$",   65, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  
-  //     275-299 --> General (end-caps, frames, cooling, cables, etc.) 
-  
-  AliMaterial(75, "GEN C$", 12.011, 6., 2.265, 18.8, 999.);
-  // verify density 
-  AliMaterial(76, "GEN Air$", 14.61, 7.3, .001205, 30423., 999);
-  AliMaterial(77, "GEN Vacuum$", 1e-16, 1e-16, 1e-16, 1e16, 1e16);
-  AliMixture( 78, "GEN POLYETHYL$", apoly, zpoly, .95, -2, wpoly);
-  AliMixture( 79, "GEN SERVICES$",  aserv, zserv, 4.68, 4, wserv);
-  AliMaterial(80, "GEN Copper$", 63.546, 29., 8.96, 1.43, 999.);  
-  // After a call with ratios by number (negative number of elements), 
-  // the ratio array is changed to the ratio by weight, so all successive 
-  // calls with the same array must specify the number of elements as 
-  // positive 
-  AliMixture(81, "GEN Water $", awat, zwat, denswat, 2, wwat);
-  //AliMaterial(82, "GEN Cables$", 12.011, 6., 2.265, 18.8, 999.);  // check !!!
-  //AliMaterial(83, "GEN patch pan$", 12.011, 6., 2.265, 18.8, 999.);  // check !!!  
-  //AliMaterial(84, "GEN serv$", 12.011, 6., 2.265, 18.8, 999.);  // check !!!  
-  AliMixture(85, "GEN Inox$", asteel, zsteel, 7.88, 4, wsteel);
-  AliMaterial(86, "GEN Al$",      26.981539, 13., 2.6989, 8.9, 999);
-  // ** 
-  AliMedium(75,"GEN C$",        75, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(76,"GEN Air$",      76, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(77,"GEN Vacuum$",   77, 0,isxfld,sxmgmx, 10., .10, .1, .100,10.00);
-  AliMedium(78,"GEN POLYETHYL$",78, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(79,"GEN SERVICES$", 79, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(80,"GEN Copper$",   80, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(81,"GEN Water $",   81, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  //AliMedium(82,"GEN Cables$",   82, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  //AliMedium(83,"GEN patch pan$",83, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);  
-  //AliMedium(84,"GEN serv$",     84, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(85,"GEN Inox$",     85, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-  AliMedium(86, "GEN Al$",      86, 0,isxfld,sxmgmx, 10., .01, .1, .003, .003);
-
-}
-//______________________________________________________________________
-void AliITSvPPRsymm::InitAliITSgeom(){
-//     Based on the geometry tree defined in Geant 3.21, this
-// routine initilizes the Class AliITSgeom from the Geant 3.21 ITS geometry
-// sturture.
-    if(!(dynamic_cast<TGeant3*>(gMC))) {
-       Error("InitAliITSgeom",
-               "Wrong Monte Carlo. InitAliITSgeom uses TGeant3 calls");
-       return;
-    } // end if
-    cout << "Reading Geometry transformation directly from Geant 3." << endl;
-    const Int_t nlayers = 6;
-    const Int_t ndeep = 7;
-    Int_t itsGeomTreeNames[nlayers][ndeep],lnam[20],lnum[20];
-    Int_t nlad[nlayers],ndet[nlayers];
-    Double_t t[3],r[10];
-    Float_t  par[20],att[20];
-    Int_t    npar,natt,idshape,imat,imed;
-    AliITSGeant3Geometry *ig = new AliITSGeant3Geometry();
-    Int_t mod,lay,lad,det,i,j,k;
-    char *names[nlayers][ndeep] = {
-     {"ALIC","ITSV","ITSD","IT12","I132","I186","ITS1"}, // lay=1
-     {"ALIC","ITSV","ITSD","IT12","I132","I131","ITS2"}, // lay=2
-     {"ALIC","ITSV","ITSD","IT34","I004","I302","ITS3"}, // lay=3
-     {"ALIC","ITSV","ITSD","IT34","I005","I402","ITS4"}, // lay=4
-     {"ALIC","ITSV","ITSD","IT56","I565","I562","ITS5"}, // lay=5
-     {"ALIC","ITSV","ITSD","IT56","I569","I566","ITS6"}};// lay=6
-    Int_t itsGeomTreeCopys[nlayers][ndeep] = {{1,1,1,1,10, 2, 4},// lay=1
-                                             {1,1,1,1,10, 4, 4},// lay=2
-                                             {1,1,1,1,14, 6, 1},// lay=3
-                                             {1,1,1,1,22, 8, 1},// lay=4
-                                             {1,1,1,1,34,22, 1},// lay=5
-                                             {1,1,1,1,38,25, 1}};//lay=6
-
-    // Sorry, but this is not very pritty code. It should be replaced
-    // at some point with a version that can search through the geometry
-    // tree its self.
-    cout << "Reading Geometry informaton from Geant3 common blocks" << endl;
-    for(i=0;i<20;i++) lnam[i] = lnum[i] = 0;
-    for(i=0;i<nlayers;i++)for(j=0;j<ndeep;j++) 
-       itsGeomTreeNames[i][j] = ig->StringToInt(names[i][j]);
-    mod = 0;
-    for(i=0;i<nlayers;i++){
-       k = 1;
-       for(j=0;j<ndeep;j++) if(itsGeomTreeCopys[i][j]!=0)
-           k *= TMath::Abs(itsGeomTreeCopys[i][j]);
-       mod += k;
-    } // end for i
-
-    if(fITSgeom!=0) delete fITSgeom;
-    nlad[0]=20;nlad[1]=40;nlad[2]=14;nlad[3]=22;nlad[4]=34;nlad[5]=38;
-    ndet[0]=4;ndet[1]=4;ndet[2]=6;ndet[3]=8;ndet[4]=23;ndet[5]=26;
-    fITSgeom = new AliITSgeom(0,6,nlad,ndet,mod);
-    mod = -1;
-    for(lay=1;lay<=nlayers;lay++){
-       for(j=0;j<ndeep;j++) lnam[j] = itsGeomTreeNames[lay-1][j];
-       for(j=0;j<ndeep;j++) lnum[j] = itsGeomTreeCopys[lay-1][j];
-       switch (lay){
-       case 1: case 2: // layers 1 and 2 are a bit special
-           lad = 0;
-           for(j=1;j<=itsGeomTreeCopys[lay-1][4];j++){
-               lnum[4] = j;
-               for(k=1;k<=itsGeomTreeCopys[lay-1][5];k++){
-                   lad++;
-                   lnum[5] = k;
-                   for(det=1;det<=itsGeomTreeCopys[lay-1][6];det++){
-                       lnum[6] = det;
-                       mod++;
-                       ig->GetGeometry(ndeep,lnam,lnum,t,r,idshape,npar,natt,
-                                       par,att,imat,imed);
-                       fITSgeom->CreatMatrix(mod,lay,lad,det,kSPD,t,r);
-                       if(!(fITSgeom->IsShapeDefined((Int_t)kSPD)))
-                           if(fMinorVersion==1){
-                             fITSgeom->ReSetShape(kSPD,
-                                                 new AliITSgeomSPD425Short());
-                           } else if(fMinorVersion==2)
-                             fITSgeom->ReSetShape(kSPD,
-                                                 new AliITSgeomSPD425Short());
-                   } // end for det
-               } // end for k
-            } // end for j
-           break;
-       case 3: case 4: case 5: case 6: // layers 3-6
-           lnum[6] = 1;
-           for(lad=1;lad<=itsGeomTreeCopys[lay-1][4];lad++){
-               lnum[4] = lad;
-               for(det=1;det<=itsGeomTreeCopys[lay-1][5];det++){
-                   lnum[5] = det;
-                   mod++;
-                   ig->GetGeometry(7,lnam,lnum,t,r,idshape,npar,natt,
-                                   par,att,imat,imed);
-                   switch (lay){
-                   case 3: case 4:
-                       fITSgeom->CreatMatrix(mod,lay,lad,det,kSDD,t,r);
-                       if(!(fITSgeom->IsShapeDefined(kSDD))) 
-                           fITSgeom->ReSetShape(kSDD,new AliITSgeomSDD256());
-                           break;
-                       case 5:
-                           fITSgeom->CreatMatrix(mod,lay,lad,det,kSSD,t,r);
-                           if(!(fITSgeom->IsShapeDefined(kSSD))) 
-                               fITSgeom->ReSetShape(kSSD,new AliITSgeomSSD275and75());
-                           break;
-                       case 6:
-                           fITSgeom->CreatMatrix(mod,lay,lad,det,kSSDp,t,r);
-                           if(!(fITSgeom->IsShapeDefined(kSSDp))) 
-                               fITSgeom->ReSetShape(kSSDp,new AliITSgeomSSD75and275());
-                           break;
-                       } // end switch
-               } // end for det
-           } // end for lad
-           break;
-       } // end switch
-    } // end for lay
-    return;
-}
-//_____________________________________________________________________________
-void AliITSvPPRsymm::Init(){
-////////////////////////////////////////////////////////////////////////
-//     Initialise the ITS after it has been created.
-////////////////////////////////////////////////////////////////////////
-    Int_t i;
-
-    cout << endl;
-    for(i=0;i<27;i++) cout << "*";cout << " ITSvPPRsymm_Init ";
-    for(i=0;i<27;i++) cout << "*";cout << endl;
-//
-    if(fRead[0]=='\0') strncpy(fRead,fEuclidGeomDet,60);
-    if(fWrite[0]=='\0') strncpy(fWrite,fEuclidGeomDet,60);
-    if(fITSgeom!=0) delete fITSgeom;
-    fITSgeom = new AliITSgeom();
-    if(fGeomDetIn) fITSgeom->ReadNewFile(fRead);
-    if(!fGeomDetIn) this->InitAliITSgeom();
-    if(fGeomDetOut) fITSgeom->WriteNewFile(fWrite);
-    AliITS::Init();
-//
-    for(i=0;i<72;i++) cout << "*";
-    cout << endl;
-}
-//_____________________________________________________________________________
-void AliITSvPPRsymm::DrawModule(){
-////////////////////////////////////////////////////////////////////////
-//     Draw a shaded view of the FMD version 9.
-////////////////////////////////////////////////////////////////////////
-  
-  // Set everything unseen
-  gMC->Gsatt("*", "seen", -1);
-  // 
-  // Set ALIC mother visible
-  gMC->Gsatt("ALIC","SEEN",0);
-  //
-  // Set the volumes visible
-  gMC->Gsatt("ITSD","SEEN",0);
-  gMC->Gsatt("ITS1","SEEN",1);
-  gMC->Gsatt("ITS2","SEEN",1);
-  gMC->Gsatt("ITS3","SEEN",1);
-  gMC->Gsatt("ITS4","SEEN",1);
-  gMC->Gsatt("ITS5","SEEN",1);
-  gMC->Gsatt("ITS6","SEEN",1);
-
-  gMC->Gsatt("IPCB","SEEN",1);
-  gMC->Gsatt("ICO2","SEEN",1);
-  gMC->Gsatt("ICER","SEEN",0);
-  gMC->Gsatt("ISI2","SEEN",0);
-  gMC->Gsatt("IPLA","SEEN",0);
-  gMC->Gsatt("ICO3","SEEN",0);
-  gMC->Gsatt("IEPX","SEEN",0);
-  gMC->Gsatt("ISI3","SEEN",1);
-  gMC->Gsatt("ISUP","SEEN",0);
-  gMC->Gsatt("ICHO","SEEN",0);
-  gMC->Gsatt("ICMO","SEEN",0);
-  gMC->Gsatt("ICMD","SEEN",0);
-  gMC->Gsatt("ICCO","SEEN",1);
-  gMC->Gsatt("ICCM","SEEN",0);
-  gMC->Gsatt("ITMD","SEEN",0);
-  gMC->Gsatt("ITTT","SEEN",1);
-
-  //
-  gMC->Gdopt("hide", "on");
-  gMC->Gdopt("shad", "on");
-  gMC->Gsatt("*", "fill", 7);
-  gMC->SetClipBox(".");
-  gMC->SetClipBox("*", 0, 300, -300, 300, -300, 300);
-  gMC->DefaultRange();
-  gMC->Gdraw("alic", 40, 30, 0, 11, 10, .07, .07);
-  gMC->Gdhead(1111, "Inner Tracking System Version 1");
-  gMC->Gdman(17, 6, "MAN");
-}
-//_____________________________________________________________________________
-void AliITSvPPRsymm::StepManager(){
-////////////////////////////////////////////////////////////////////////
-//    Called for every step in the ITS, then calls the AliITShit class
-// creator with the information to be recoreded about that hit.
-////////////////////////////////////////////////////////////////////////
-
-/*
-  Int_t         copy, id;
-  Float_t       hits[8];
-  Int_t         vol[4];
-  TLorentzVector position, momentum;
-//  TClonesArray &lhits = *fHits;
-//
-// no hits for this  symmetric version.
-//
-
-  //
-  // Track status
-  vol[3] = 0;
-  if(gMC->IsTrackInside())      vol[3] +=  1;
-  if(gMC->IsTrackEntering())    vol[3] +=  2;
-  if(gMC->IsTrackExiting())     vol[3] +=  4;
-  if(gMC->IsTrackOut())         vol[3] +=  8;
-  if(gMC->IsTrackDisappeared()) vol[3] += 16;
-  if(gMC->IsTrackStop())        vol[3] += 32;
-  if(gMC->IsTrackAlive())       vol[3] += 64;
-  //
-  // Fill hit structure.
-  if( !(gMC->TrackCharge()) ) return;
-    //
-    // Only entering charged tracks
-    if((id=gMC->CurrentVolID(copy))==fIdSens[0]) {  
-      vol[0]=1;
-      id=gMC->CurrentVolOffID(1,copy);      
-      vol[1]=copy;
-      id=gMC->CurrentVolOffID(2,copy);
-      vol[2]=copy;                       
-    } else if(id==fIdSens[1]) {
-      vol[0]=2;
-      id=gMC->CurrentVolOffID(1,copy);       
-      vol[1]=copy;
-      id=gMC->CurrentVolOffID(2,copy);
-      vol[2]=copy;                    
-    } else if(id==fIdSens[2]) {
-      vol[0]=3;
-      vol[1]=copy;
-      id=gMC->CurrentVolOffID(1,copy);
-      vol[2]=copy;             
-    } else if(id==fIdSens[3]) {
-      vol[0]=4;
-      vol[1]=copy;
-      id=gMC->CurrentVolOffID(1,copy);
-      vol[2]=copy;                  
-    } else if(id==fIdSens[4]) {
-      vol[0]=5;
-      vol[1]=copy;
-      id=gMC->CurrentVolOffID(1,copy);
-      vol[2]=copy;               
-    } else if(id==fIdSens[5]) {
-      vol[0]=6;
-      vol[1]=copy;
-      id=gMC->CurrentVolOffID(1,copy);
-      vol[2]=copy;                      
-    } else return;
-    gMC->TrackPosition(position);
-    gMC->TrackMomentum(momentum);
-    hits[0]=position[0];
-    hits[1]=position[1];
-    hits[2]=position[2];          
-    hits[3]=momentum[0];
-    hits[4]=momentum[1];
-    hits[5]=momentum[2];
-    hits[6]=gMC->Edep();
-    hits[7]=gMC->TrackTime();
-//    new(lhits[fNhits++]) AliITShit(fIshunt,gAlice->CurrentTrack(),vol,hits);
-//
-// no hits for this  symmetric version.
-//
-*/
-}