X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=TPC%2FAliTPCv0.cxx;h=1f1067dc4329f1ca2625f9d563170e735463f962;hb=dabc4c3539d0091176df20d5623ea57c298601df;hp=eedf1a07cee9c7b2b000434672eb04814505b131;hpb=cfce887023b4d349cb7b743880a8f9086a600d9d;p=u%2Fmrichter%2FAliRoot.git

diff --git a/TPC/AliTPCv0.cxx b/TPC/AliTPCv0.cxx
index eedf1a07cee..1f1067dc432 100644
--- a/TPC/AliTPCv0.cxx
+++ b/TPC/AliTPCv0.cxx
@@ -1,3 +1,21 @@
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ *                                                                        *
+ * Author: The ALICE Off-line Project.                                    *
+ * Contributors are mentioned in the code where appropriate.              *
+ *                                                                        *
+ * Permission to use, copy, modify and distribute this software and its   *
+ * documentation strictly for non-commercial purposes is hereby granted   *
+ * without fee, provided that the above copyright notice appears in all   *
+ * copies and that both the copyright notice and this permission notice   *
+ * appear in the supporting documentation. The authors make no claims     *
+ * about the suitability of this software for any purpose. It is          *
+ * provided "as is" without express or implied warranty.                  *
+ **************************************************************************/
+
+/* $Id$ */
+//
+
 ///////////////////////////////////////////////////////////////////////////////
 //                                                                           //
 //  Time Projection Chamber version 0 -- "coarse" TPC                        //
@@ -11,18 +29,29 @@
 //                                                                           //
 ///////////////////////////////////////////////////////////////////////////////
 
-#include <TMath.h>
+#include <Riostream.h>
+
 #include <TGeometry.h>
+#include <TMath.h>
 #include <TNode.h>
 #include <TTUBE.h>
-#include "AliTPCv0.h"
-#include "AliRun.h"
-#include <iostream.h>
-#include <fstream.h>
+#include <TVirtualMC.h>
+#include <TString.h>
+#include <TSystem.h>
 
-#include "AliMC.h"
 #include "AliConst.h"
-
+#include "AliRun.h"
+#include "AliTPCDigitsArray.h"
+#include "AliTPCParamSR.h"
+#include "AliTPCv0.h"
+#include "TGeoManager.h"
+#include "TGeoVolume.h"
+#include "TGeoPcon.h"
+#include "TGeoTube.h"
+#include "TGeoPgon.h"
+#include "TGeoTrd1.h"
+#include "TGeoCompositeShape.h"
+#include "TGeoPara.h"
 ClassImp(AliTPCv0)
  
 //_____________________________________________________________________________
@@ -32,18 +61,23 @@ AliTPCv0::AliTPCv0(const char *name, const char *title)
   //
   // Standard creator for TPC version 0
   //
+
+
+  if (fTPCParam)
+     fTPCParam->Write(fTPCParam->GetTitle());
 }
 
 //_____________________________________________________________________________
 void AliTPCv0::CreateGeometry()
 {
+
   //
-  // Creation of the TPC coarse geometry (version 0)
-  // Origin Marek Kowalski Crakow
+  // Creation of the TPC version 0, i.e. no sensitive volumes,
+  // only the material distribution
   //
   //Begin_Html
   /*
-    <img src="picts/AliTPCv0.gif">
+    <img src="picts/AliTPC.gif">
   */
   //End_Html
   //Begin_Html
@@ -52,469 +86,755 @@ void AliTPCv0::CreateGeometry()
   */
   //End_Html
 
-  Int_t *idtmed = fIdtmed->GetArray()-399;
-
-  Float_t tana, rlsl, wlsl, rssl, rlsu, wssl, wlsu,
-    rssu, wssu, alpha, x, y, sec_thick;
-  
-  Float_t x1, z0, z1, x2, theta1, theta2, theta3, dm[21];
-  Int_t il, iu;
-  Float_t z_side;
-  Int_t idrotm[100];
-  
-  Float_t x0l, x0u;
-  Int_t idr;
-  //Float_t thl, thu;
-  Float_t opl, opu, phi1, phi2, phi3;
-  
-  // ---------------------------------------------------- 
-  //          FIELD CAGE WITH ENDCAPS - CARBON FIBER 
-  //          THIS IS ALSO A TPC MOTHER VOLUME 
-  // ---------------------------------------------------- 
-  dm[0] = 76.;
-  dm[1] = 278.;
-  dm[2] = 275.;
-  
-  gMC->Gsvolu("TPC ", "TUBE", idtmed[407], dm, 3);
-  // ------------------------------------------------------- 
-  //     drift gas Ne/CO2 (90/10 volume) - nonsensitive 
-  //     field cage thickness = 0.52% X0 
-  // ---------------------------------------------------- 
-  dm[0] = 76.+0.09776;
-  dm[1] = 257.;
-  dm[2] = 250.;
+ //----------------------------------------------------------
+  // This geometry is written using TGeo class
+  // Firstly the shapes are defined, and only then the volumes
+  // What is recognized by the MC are volumes
+  //----------------------------------------------------------
+  //
+  //  tpc - this will be the mother volume
+  //
 
-  gMC->Gsvolu("TGAS", "TUBE", idtmed[402], dm, 3);
-  // ------------------------------------------------------ 
-  //     "side" gas volume (the same as drift gas) 
-  //     here the readout chambers are positioned 
-  // ------------------------------------------------------ 
-  dm[2]  = 0.5*(275.-250.);
-  z_side = dm[2];
-  
-  gMC->Gsvolu("TPSG", "TUBE", idtmed[401], dm, 3);
-  // ------------------------------------------------------ 
-  //      HV midplane - 20 microns of mylar 
-  // ----------------------------------------------------- 
-  dm[2] = .001;
-  
-  gMC->Gsvolu("TPHV", "TUBE", idtmed[405], dm, 3);
-  
-  // ==================================================== 
-  //   lower and upper readout chambers 
-  // ==================================================== 
-  //   sectros opening angles in degrees 
-  // --------------------------------------------------- 
-  opl = 30.;
-  opu = 15.;
-  //thl = TMath::Tan(opl * .5 * kDegrad);
-  //thu = TMath::Tan(opu * .5 * kDegrad);
-  // --------------------------------------------------- 
-  //         S and L-sectors radii 
-  // --------------------------------------------------- 
-  rssl = 88.;
-  rssu = 136.;
-  rlsl = 142.;
-  rlsu = 250.;
-  // -------------------------------------------------- 
-  //          Sectors widths 
-  // -------------------------------------------------- 
-  wssl = 46.5;
-  wssu = 72.2;
-  wlsl = 37.;
-  wlsu = 65.4;
-  // --------------------------------------------------- 
-  //    Sector thickness 25% of X0 (Al) 
-  // --------------------------------------------------- 
-  sec_thick = 2.225;
-  // --------------------------------------------------- 
-  //     S-sectors readout chambers (lower sectors) 
-  // --------------------------------------------------- 
-  dm[0] = wssl * .5;
-  dm[1] = wssu * .5;
-  dm[2] = sec_thick * .5;
-  dm[3] = (rssu - rssl) * .5;
-  
-  x0l = rssl + dm[3];
-  
-  gMC->Gsvolu("TRCS", "TRD1", idtmed[399], dm, 4);
-  // --------------------------------------------------- 
-  //     L-sectors readout chambers (upper sectors) 
-  // --------------------------------------------------- 
-  dm[0] = wlsl * .5;
-  dm[1] = wlsu * .5;
-  dm[2] = sec_thick * .5;
-  dm[3] = (rlsu - rlsl) * .5;
-  
-  x0u = rlsl + dm[3];
-  
-  gMC->Gsvolu("TRCL", "TRD1", idtmed[399], dm, 4);
-  // ---------------------------------------------------- 
-  //    positioning of the S-sector readout chambers 
-  //    rotation matices 1-12 
-  // ---------------------------------------------------- 
-  z1 = -z_side + sec_thick * .5;
+  //
+  // here I define a volume TPC
+  // retrive the medium name with "TPC_" as a leading string
+  //
+  TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
+  tpc->DefineSection(0,-290.,77.,278.);
+  tpc->DefineSection(1,-259.6,70.,278.);
+  //
+  tpc->DefineSection(2,-259.6,68.1,278.);
+  tpc->DefineSection(3,-253.6,68.1,278.);
+  //
+  tpc->DefineSection(4,-253.6,68.,278.);
+  tpc->DefineSection(5,-74.0,60.8,278.);
+  //
+  tpc->DefineSection(6,-74.0,60.1,278.);
+  tpc->DefineSection(7,-73.3,60.1,278.);
+  //
+  tpc->DefineSection(8,-73.3,56.9,278.); 
+  tpc->DefineSection(9,73.3,56.9,278.);
+  //
+  tpc->DefineSection(10,73.3,60.1,278.);
+  tpc->DefineSection(11,74.0,60.1,278.);
+  //
+  tpc->DefineSection(12,74.0,60.8,278.);
+  tpc->DefineSection(13,253.6,65.5,278.);
+  //
+  tpc->DefineSection(14,253.6,65.6,278.);
+  tpc->DefineSection(15,259.6,65.6,278.);
+  //
+  tpc->DefineSection(16,259.6,70.0,278.);
+  tpc->DefineSection(17,290.,77.,278.);
+  //
+  TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
+  TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
+  //
+  // drift volume - sensitive volume, extended beyond the
+  // endcaps, because of the alignment
+  //
+  TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
+  dvol->DefineSection(0,-260.,74.5,264.4);
+  dvol->DefineSection(1,-253.6,74.5,264.4);
+  //
+  dvol->DefineSection(2,-253.6,76.6774,258.);
+  dvol->DefineSection(3,253.6,76.6774,258.); 
+  //
+  dvol->DefineSection(4,253.6,74.5,264.4);
+  dvol->DefineSection(5,260.,74.5,264.4);
+  //
+  TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-1");
+  TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
+  //
+  v1->AddNode(v9,1);
+  //
+  // outer insulator
+  //
+  TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
+  //
+  tpco->DefineSection(0,-256.6,264.8,278.);
+  tpco->DefineSection(1,-253.6,264.8,278.);
+  //
+  tpco->DefineSection(2,-253.6,258.,278.);
+  tpco->DefineSection(3,250.6,258.,278.);
+  //
+  tpco->DefineSection(4,250.6,258.,275.5);
+  tpco->DefineSection(5,253.6,258.,275.5);
+  //
+  TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
+  TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
+  //
+  // outer containment vessel
+  //
+  TGeoPcon *tocv = new TGeoPcon(0.,360.,6);  // containment vessel
+  //
+  tocv->DefineSection(0,-256.6,264.8,278.);
+  tocv->DefineSection(1,-253.6,264.8,278.);
+  //
+  tocv->DefineSection(2,-253.6,274.8124,278.);
+  tocv->DefineSection(3,247.6,274.8124,278.);  
+  //
+  tocv->DefineSection(4,247.6,270.4,278.);
+  tocv->DefineSection(5,250.6,270.4,278.);
+  //
+  TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
+  TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3); 
+  //
+  TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
+  TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
+  TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
+  TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
+  //
+  TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
+  TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
+  TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
+  TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
+  //
+  TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
+  TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
+  TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
+  TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
+  //-------------------------------------------------------
+  //  Tpc Outer Field Cage
+  //  daughters - composite (sandwich)
+  //-------------------------------------------------------
 
-  for (il = 1; il <= 12; ++il) {
-    phi1 = (il - 1) * opl + 270.;
-    if (phi1 > 360.) {
-      phi1 += -360.;
-    }
-    theta1 = 90.;
-    phi2   = 90.;
-    theta2 = 180.;
-    phi3   = (il - 1) * opl;
-    theta3 = 90.;
-    
-    idr = il;
-    
-    alpha = (il - 1) * opl * kDegrad;
-    x     = x0l * TMath::Cos(alpha);
-    y     = x0l * TMath::Sin(alpha);
-    
-    AliMatrix(idrotm[idr], theta1, phi1, theta2, phi2, theta3, phi3);
-    gMC->Gspos("TRCS", il, "TPSG", x, y, z1, idrotm[idr], "ONLY");
-  }
-  // ---------------------------------------------------- 
-  //    positioning of the L-sector readout chambers 
-  //    rotation matices 13-36 
-  // ---------------------------------------------------- 
-  for (iu = 1; iu <= 24; ++iu) {
-    phi1 = (iu - 1) * opu + 270.;
-    if (phi1 > 360.) {
-      phi1 += -360.;
-    }
-    theta1 = 90.;
-    phi2   = 90.;
-    theta2 = 180.;
-    phi3   = (iu - 1) * opu;
-    theta3 = 90.;
-    
-    idr = iu + 12;
-    AliMatrix(idrotm[idr], theta1, phi1, theta2, phi2, theta3, phi3);
-    
-    alpha = (iu - 1) * opu * kDegrad;
-    x     = x0u * TMath::Cos(alpha);
-    y     = x0u * TMath::Sin(alpha);
-    
-    gMC->Gspos("TRCL", iu, "TPSG", x, y, z1, idrotm[idr], "ONLY");
-  }
-  // -------------------------------------------------------- 
-  //             Spoke wheel structures 
-  // -------------------------------------------------------- 
-  gMC->Gsvolu("TSWS", "TUBE", idtmed[399], dm, 0);
-  
-  z0 = -z_side + 2.;
-  
-  dm[0] = 82.;
-  dm[1] = 86.;
-  dm[2] = 1.;
-  
-  gMC->Gsposp("TSWS", 1, "TPSG", 0, 0, z0, 0, "ONLY", dm, 3);
-  
-  dm[0] = 253.;
-  dm[1] = 257.;
-  
-  gMC->Gsposp("TSWS", 2, "TPSG", 0, 0, z0, 0, "ONLY", dm, 3);
-  
-  dm[0] = 140.9;
-  dm[1] = 141.9;
-  
-  gMC->Gsposp("TSWS", 3, "TPSG", 0, 0, z0, 0, "ONLY", dm, 3);
-  
-  // ------------------------------------------------------- 
-  //    this volumes are to avoid overlaping 
-  // ------------------------------------------------------- 
-  z0 = 253.;
-  
-  dm[0] = 76.;
-  dm[1] = 76.+0.09776;
-  
-  gMC->Gsposp("TSWS", 4, "TPC ", 0, 0, z0, 0, "ONLY", dm, 3);
-  gMC->Gsposp("TSWS", 5, "TPC ", 0, 0, -z0,0, "ONLY", dm, 3);
-  
-  z0 += 21.;
-  
-  gMC->Gsposp("TSWS", 6, "TPC ", 0, 0, z0, 0, "ONLY", dm, 3);
-  gMC->Gsposp("TSWS", 7, "TPC ", 0, 0, -z0, 0, "ONLY", dm, 3);
-  
-  dm[0] = 257.;
-  dm[1] = 257.+0.09776;
-  dm[2] = 11.5;
-  
-  z0 = 263.5;
-  
-  gMC->Gsposp("TSWS", 8, "TPC ", 0, 0, z0, 0, "ONLY", dm, 3);
-  gMC->Gsposp("TSWS", 9, "TPC ", 0, 0, -z0, 0, "ONLY", dm, 3);
-  // ========================================================== 
-  //                  wheels 
-  // ========================================================== 
-  // ---------------------------------------------------------- 
-  //       Large wheel -> positioned in the TPC 
-  // ---------------------------------------------------------- 
-  dm[0] = 257.+0.09776;
-  dm[1] = 278.;
-  dm[2] = 11.5;
-  gMC->Gsvolu("TPW1", "TUBE", idtmed[399], dm, 3);
-  
-  dm[0] = 259.;
-  dm[1] = 278.;
-  dm[2] = 9.5;
-  
-  gMC->Gsvolu("TPW2", "TUBE", idtmed[498], dm, 3);
-  
-  gMC->Gspos("TPW2", 1, "TPW1", 0, 0, 0, 0, "ONLY");
-  
-  gMC->Gspos("TPW1", 1, "TPC ", 0, 0, z0, 0, "ONLY");
-  gMC->Gspos("TPW1", 2, "TPC ", 0, 0, -z0, 0, "ONLY");
-  // ----------------------------------------------------------- 
-  //     Small wheel -> positioned in the TPSG 
-  // ----------------------------------------------------------- 
-  dm[0] = 76.+0.09776;
-  dm[1] = 82.;
-  dm[2] = 11.5;
-  
-  gMC->Gsvolu("TPW3", "TUBE", idtmed[399], dm, 3);
-  
-  dm[0] = 76.+0.09776;
-  dm[1] = 80.;
-  dm[2] = 9.5;
-  
-  gMC->Gsvolu("TPW4", "TUBE", idtmed[401], dm, 3);
-  
-  gMC->Gspos("TPW4", 1, "TPW3", 0, 0, 0, 0, "ONLY");
-  
-  z0 = 1.;
-  
-  gMC->Gspos("TPW3", 1, "TPSG", 0, 0, z0, 0, "ONLY");
-  // --------------------------------------------------------- 
-  //       spokes, inner and outer, also the inner ring 
-  // --------------------------------------------------------- 
-  dm[0] = 0.5*(135.9-82.1);
-  dm[1] = 3.;
-  dm[2] = 2.;
-  
-  x1 = dm[0] + 82.;
-  
-  gMC->Gsvolu("TSPI", "BOX ", idtmed[399], dm, 3);
-  
-  dm[1] = 2.;
-  dm[2] = 1.;
-  
-  gMC->Gsvolu("TSP1", "BOX ", idtmed[498], dm, 3);
+  TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
+  //
+  tofc->DefineSection(0,-253.6,258.,269.6);
+  tofc->DefineSection(1,-250.6,258.,269.6);
+  //
+  tofc->DefineSection(2,-250.6,258.,260.0676); 
+  tofc->DefineSection(3,250.6,258.,260.0676);
+  //
+  tofc->DefineSection(4,250.6,258.,275.5);
+  tofc->DefineSection(5,253.6,258.,275.5);
+  //
+  TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3); 
+  //sandwich
+  TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
+  TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
+  TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
+  //
+  TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
+  //
+  TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
+  TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
+  TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
+  //
+  // outer part - positioning
+  //
+  tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
+  //
+  tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
+  //
+  v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
+  //
+  v2->AddNode(v3,1); v2->AddNode(v4,1); 
+  //
+  v1->AddNode(v2,1);
+  //-----------------------------------------------------------
+  //--------------------------------------------------------------------
+  // Tpc Inner INsulator (CO2) 
+  // the cones, the central drum and the inner f.c. sandwich with a piece
+  // of the flane will be placed in the TPC
+  //--------------------------------------------------------------------
+  TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
+  //
+  tpci->DefineSection(0,-253.6,68.4,76.6774);
+  tpci->DefineSection(1,-74.0,61.2,76.6774);
+  //
+  tpci->DefineSection(2,74.0,61.2,76.6774);  
+  //
+  tpci->DefineSection(3,253.6,65.9,76.6774);
+  //
+  TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
+  //
+  // now the inner field cage - only part of flanges (2 copies)
+  //
+  TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5); 
+  TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
+  //
+ //---------------------------------------------------------
+  // Tpc Inner Containment vessel - Muon side
+  //---------------------------------------------------------
+  TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
+  //
+  tcms->DefineSection(0,-259.1,68.1,74.2);
+  tcms->DefineSection(1,-253.6,68.1,74.2);
+  //
+  tcms->DefineSection(2,-253.6,68.1,68.4);
+  tcms->DefineSection(3,-74.0,60.9,61.2);
+  //
+  tcms->DefineSection(4,-74.0,60.1,61.2);
+  tcms->DefineSection(5,-73.3,60.1,61.2);
+  //
+  tcms->DefineSection(6,-73.3,56.9,61.2);
+  tcms->DefineSection(7,-73.0,56.9,61.2);
+  //
+  tcms->DefineSection(8,-73.0,56.9,58.8);
+  tcms->DefineSection(9,-71.3,56.9,58.8);
+  //
+  TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
+  //-----------------------------------------------
+  // inner containment vessel - shaft side
+  //-----------------------------------------------
+  TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
+  //
+  tcss->DefineSection(0,71.3,56.9,58.8);
+  tcss->DefineSection(1,73.0,56.9,58.8);
+  //
+  tcss->DefineSection(2,73.0,56.9,61.2);
+  tcss->DefineSection(3,73.3,56.9,61.2);
+  //  
+  tcss->DefineSection(4,73.3,60.1,61.2);
+  tcss->DefineSection(5,74.0,60.1,61.2);
+  //
+  tcss->DefineSection(6,74.0,60.9,61.2);
+  tcss->DefineSection(7,253.6,65.6,65.9);
+  //
+  tcss->DefineSection(8,253.6,65.6,74.2);
+  tcss->DefineSection(9,258.1,65.6,74.2);
+  //
+  TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
+  //-----------------------------------------------
+  //  Inner field cage
+  //  define 4 parts and make an assembly
+  //-----------------------------------------------
+  // part1 - Al - 2 copies
+  TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
+  TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
+  // sandwich - outermost parts - 2 copies
+  TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
+  TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
+  TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
+  TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
+  //
+  TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
+  TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
+  TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
+  TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
+  //
+  // middle parts - 2 copies
+  TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
+  TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
+  TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
+  TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
+  //
+  TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
+  TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
+  TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
+  TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
+  // central part - 1 copy
+  TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns 
+  TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
+  TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
+  //
+  TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
+  TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
+  TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
+  //
+  // inner part - positioning
+  //
+  // creating a sandwich
+  tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
+  //
+  tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
+  //
+  tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
+  //
+  TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
+  //
+  tv100->AddNode(tv10,1);
+  tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
+  tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
+  tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
+  tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
+  tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
+  tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
+  //
+  v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
+  v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
+  v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1); 
+  v9->AddNode(tv100,1);
+  //
+  // central drum 
+  //
+  // flange + sandwich
+  //
+  TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
+  cfl->DefineSection(0,-71.1,59.7,61.2);
+  cfl->DefineSection(1,-68.6,59.7,61.2);
+  //
+  cfl->DefineSection(2,-68.6,60.6324,61.2);
+  cfl->DefineSection(3,68.6,60.6324,61.2); 
+  //
+  cfl->DefineSection(4,68.6,59.7,61.2);
+  cfl->DefineSection(5,71.1,59.7,61.2);  
+  //
+  TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
+  // sandwich
+  TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
+  TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
+  TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);  
+  //
+  TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
+  TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
+  TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
+  TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
+  //
+  // seals for central drum 2 copies
+  //
+  TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
+  TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
+  TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
+  v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.));
+  v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.));
+  //
+  // seal collars 
+  TGeoPcon *se = new TGeoPcon(0.,360.,6);
+  se->DefineSection(0,-72.8,59.7,61.2);
+  se->DefineSection(1,-72.3,59.7,61.2);
+  //
+  se->DefineSection(2,-72.3,58.85,61.2);
+  se->DefineSection(3,-71.6,58.85,61.2); 
+  //
+  se->DefineSection(4,-71.6,59.7,61.2);
+  se->DefineSection(5,-71.3,59.7,61.2);  
+  //
+  TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
+  //
+  TGeoTube *si = new TGeoTube(56.9,58.8,1.); 
+  TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
+  //
+  // define reflection matrix 
+  //
+  TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
+  //
+  cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
+  //
+  v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
+  v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
+  v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
+  //
+  // central membrane - 2 rings and a mylar membrane - assembly
+  //
+  TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
+  TGeoTube *oh = new TGeoTube(250.,256.,.5);
+  TGeoTube *mem = new TGeoTube(84.05,250,0.01);
+  TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
+  TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
+  TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
+  //
+  TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
+  cm->AddNode(ihv,1);
+  cm->AddNode(ohv,1);
+  cm->AddNode(memv,1);
+  v9->AddNode(cm,1);
+  //
+  // end caps - they are make as an assembly of single segments
+  // containing both readout chambers
+  //
+  Double_t openingAngle = 10.*TMath::DegToRad();
+  Double_t thick=1.5; // rib
+  Double_t shift = thick/TMath::Sin(openingAngle);
+  //
+  Double_t lowEdge = 86.3; // hole in the wheel
+  Double_t upEdge = 240.4; // hole in the wheel
+  //
+  new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
+  //
+  TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
+  //
+  hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
+  hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
+  //
+  hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
+  hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
+  //
+  Double_t ys = shift*TMath::Sin(openingAngle); 
+  Double_t xs = shift*TMath::Cos(openingAngle);
+  TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);  
+  tr->RegisterYourself();
+  TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
+  TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
+  TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
+  bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
+  bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
+  TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
+  TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
+  //
+  ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
+  //
+  // readout chambers
+  //
+  // IROC first
+  //
+   TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
+   TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
+  // empty space
+   TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
+   TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
+   ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
+   //bars
+   Double_t tga = (19.8328-12.3742)/39.3;
+   Double_t xmin,xmax;
+   xmin = 9.55*tga+12.3742;
+   xmax = 9.95*tga+12.3742;
+   TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
+   TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
+   empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
+   xmin=19.4*tga+12.3742;
+   xmax=19.9*tga+12.3742;
+   TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
+   TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
+   empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
+   xmin=29.35*tga+12.3742;
+   xmax=29.75*tga+12.3742;
+   TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2); 
+   TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);    
+   empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
+   //
+   // holes for connectors
+   //
+   TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
+   TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
+   TString fileName(gSystem->Getenv("ALICE_ROOT"));
+   fileName += "/TPC/conn_iroc.dat";
+   ifstream in;
+   in.open(fileName.Data(), ios_base::in); // asci file
+   for(Int_t i =0;i<86;i++){
+      Double_t y = 3.99;
+      Double_t x,z,ang;
+      in>>x>>z>>ang;
+      z-=26.5;
+      TGeoRotation *rrr = new TGeoRotation();
+      rrr->RotateY(ang);
+      TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
+      ibdv->AddNode(connv,i+1,trans);
+   }
+   in.close();
+   // "cap"
+   new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
+   // "hole"
+   new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
+   TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);  
+   tr1->RegisterYourself();
+   TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
+   TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
+   //
+   // pad plane and wire fixations
+   //
+   TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
+   TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
+   TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
+   TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
+   TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
+   TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
+   TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
+   //
+   TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
+   //
+   iroc->AddNode(ibdv,1);
+   iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
+   iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
+   tga =(23.3521-14.5974)/49.65; 
+   Double_t xx = 24.825*tga+14.5974-0.6;
+   iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
+   iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
+   //
+   // OROC
+   //
+   TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
+   TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
+   TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
+   TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
+   obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
+   //horizontal bars
+   tga=(38.5084-20.2938)/99.3;
+   xmin=tga*10.2+20.2938;
+   xmax=tga*10.6+20.2938;
+   TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
+   TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
+   //
+   xmin=22.55*tga+20.2938;
+   xmax=24.15*tga+20.2938;
+   TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
+   TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
+   //
+   xmin=36.1*tga+20.2938;
+   xmax=36.5*tga+20.2938;
+   TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
+   TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
+   //
+   xmin=49.0*tga+20.2938;
+   xmax=50.6*tga+20.2938;   
+   TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
+   TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
+   //
+   xmin=63.6*tga+20.2938;
+   xmax=64.0*tga+20.2938;
+   TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
+   TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
+   //
+   xmin=75.5*tga+20.2938;
+   xmax=77.15*tga+20.2938;
+   TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
+   TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
+   //
+   xmin=88.7*tga+20.2938;
+   xmax=89.1*tga+20.2938;
+   TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
+   TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
+   //
+   oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
+   oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
+   oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
+   oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
+   oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
+   oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
+   oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
+   // vertical bars
+   TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1); 
+   TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
+   TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
+   TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
+   TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
+   //
+   TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
+   TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
+   TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
+   TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
+   TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
+   //
+   oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
+   oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
+   oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
+   oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
+   oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
+   oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
+   oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
+   oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
+   //
+   // holes for connectors
+   //
+   fileName = gSystem->Getenv("ALICE_ROOT");
+   fileName += "/TPC/conn_oroc.dat";
+   in.open(fileName.Data(), ios_base::in); // asci file
+   for(Int_t i =0;i<78;i++){
+      Double_t y =3.89;
+      Double_t x,z,ang;
+      Double_t x1,z1,x2,z2;
+      in>>x>>z>>ang;        
+      Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
+      Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
+      //
+      x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;      
+      //
+      TGeoRotation *rr = new TGeoRotation();
+      rr->RotateY(ang); 
+      z1-=54.95;
+      z2-=54.95;
+      TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
+      TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
+      obdv->AddNode(connv,i+1,trans1);
+      obdv->AddNode(connv,i+79,trans2);
+   }
+   in.close();
+   // cap
+   new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
+   new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
+   TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
+   tr5->RegisterYourself();
+   TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
+   TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
+   //
+   // pad plane and wire fixations
+   //
+   TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
+   TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
+   //
+   tga=(43.5239-23.3874)/114.2;
+   TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
+   TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);  
+   xx = 57.1*tga+23.3874-0.7;
+   TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
+   TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
+   //
+   TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
+   //
+   oroc->AddNode(obdv,1);
+   oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
+   oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
+   oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
+   oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
+   // 
+   // now iroc and oroc are placed into a sector...
+   //
+   TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
+   TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
+   //
 
-  gMC->Gspos("TSP1", 1, "TSPI", 0, 0, 0, 0, "ONLY");
-  
-  dm[0] = 0.5*(256.9-142.1);
-  dm[1] = 3.;
-  dm[2] = 2.;
-  
-  x2 = dm[0] + 142.;
-  
-  gMC->Gsvolu("TSPO", "BOX ", idtmed[399], dm, 3);
-  
-  dm[1] = 2.;
-  dm[2] = 1.;
-  
-  gMC->Gsvolu("TSP2", "BOX ", idtmed[498], dm, 3);
-  
-  gMC->Gspos("TSP2", 1, "TSPO", 0, 0, 0, 0, "ONLY");
-  // -------------------------------------------------------- 
-  dm[0] = 136.;
-  dm[1] = 142.;
-  dm[2] = 2.;
-  
-  gMC->Gsvolu("TSWH", "TUBE", idtmed[399], dm, 3);
-  
-  dm[0] = 137.;
-  dm[1] = 141.;
-  dm[2] = 1.;
-  
-  gMC->Gsvolu("TSW1", "TUBE", idtmed[498], dm, 3);
-  
-  gMC->Gspos("TSW1", 1, "TSWH", 0, 0, 0, 0, "ONLY");
+   TGeoRotation rot1("rot1",90.,90.,0.);
+   TGeoRotation rot2("rot2");
+   rot2.RotateY(10.);
+   TGeoRotation *rot = new TGeoRotation("rot");
+   *rot=rot1*rot2;
+   //
+   Double_t x0,y0;
+   x0=110.2*TMath::Cos(openingAngle);
+   y0=110.2*TMath::Sin(openingAngle);
+   TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //a-side 
+   TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //c-side
+   x0=188.45*TMath::Cos(openingAngle);
+   y0=188.45*TMath::Sin(openingAngle);
+   TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //a-side
+   TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //c-side
+   //
+   // A-side
+   //
+   secta->AddNode(ch,1);
+   secta->AddNode(iroc,1,combi1a);
+   secta->AddNode(oroc,1,combi2a);
+   //
+   // C-side
+   //
+   sectc->AddNode(ch,1);
+   sectc->AddNode(iroc,1,combi1c);
+   sectc->AddNode(oroc,1,combi2c);
+   //
+   // now I try to make  wheels...
+   //
+   TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
+   TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
+   //
+   for(Int_t i =0;i<18;i++){
+     Double_t phi = (20.*i);
+     TGeoRotation *r = new TGeoRotation();
+     r->RotateZ(phi);
+     wheela->AddNode(secta,i+1,r);
+     wheelc->AddNode(sectc,i+1,r);    
+   }
+   // wheels in the drift volume!
+   TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
+   v9->AddNode(wheela,1,combi3);
+   v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
+   //_____________________________________________________________
+   // service support wheel
+   //_____________________________________________________________
+  TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
+  sw->DefineSection(0,-4.,80.5,251.75);
+  sw->DefineSection(1,4.,80.5,251.75); 
+  TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
+  //
+  thick=1.;
+  shift = thick/TMath::Sin(openingAngle);
+  TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
+  sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
+  sh->DefineSection(1,4.,81.5-shift,250.75-shift);
+  TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
+  //
+  TGeoMedium *m9 =  gGeoManager->GetMedium("TPC_Si"); 
+  TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
+  el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
+  el->DefineSection(1,1.872,81.5-shift,250.75-shift);
+  TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si 
+  //
+  shv->AddNode(elv,1);
+  //
+  //
+  ys = shift*TMath::Sin(openingAngle);
+  xs = shift*TMath::Cos(openingAngle);
+  swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
+  // cover
+  TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
+  co->DefineSection(0,-0.5,77.,255.25);
+  co->DefineSection(1,0.5,77.,255.25);
+  TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
+  // hole in a cover
+  TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
+  shift=4./TMath::Sin(openingAngle);
+  coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
+  coh->DefineSection(1,0.5,85.-shift,247.25-shift);  
+  //
+  TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
+  //
+  ys = shift*TMath::Sin(openingAngle);
+  xs = shift*TMath::Cos(openingAngle);  
+  cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
+  //
+  // Sector as an Assembly
+  //
+  TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
+  swhs->AddNode(swv,1);
+  swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
+  swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
+  //
+  // SSW as an Assembly of sectors
+  //
+ TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
+   for(Int_t i =0;i<18;i++){
+     Double_t phi = (20.*i);
+     TGeoRotation *r = new TGeoRotation();
+     r->RotateZ(phi);
+     swheel->AddNode(swhs,i+1,r);   
+   }
+   v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
+   v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
+   //
+  //----------------------------------------------------------
+  // TPc Support Rods - MAKROLON
+  //----------------------------------------------------------
+  TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
+  TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
+  // upper and lower rods differ in length!
+  Double_t *upar;
+  upar=NULL;
+  gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
+  upar=new Double_t [3];
+  upar[0]=1.8;
+  upar[1]=2.2;
   
-  z0 = z_side - .16168 - 2.;
-  // -------------------------------------------------------- 
-  gMC->Gspos("TSWH", 1, "TPSG", 0, 0, z0, 0, "ONLY");
-  // ------------------------------------------------------- 
-  //     posiioning of the inner spokes 
-  // ------------------------------------------------------- 
-  for (il = 1; il <= 6; ++il) {
-    phi1 = opl * .5 + (il - 1) * 2. * opl;
-    theta1 = 90.;
-    phi2 = opl * .5 + 90. + (il - 1) * 2. * opl;
-    if (phi2 > 360.) {
-      phi2 += -360.;
+  //
+  //HV rods - makrolon + 0.58cm (diameter) Cu
+  TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
+  TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
+  //
+  TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
+  TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
+  hvrv->AddNode(hvcv,1);
+  for(Int_t i=0;i<18;i++){
+    Double_t angle,x,y;
+    Double_t z,r; 
+    angle=TMath::DegToRad()*20.*(Double_t)i;
+    r=81.5;
+    x=r * TMath::Cos(angle);
+    y=r * TMath::Sin(angle);
+    upar[2]=126.64; //lower
+    z= 126.96;
+    if(i==15){
+      v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
+      v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
     }
-    theta2 = 90.;
-    phi3   = 0.;
-    theta3 = 0.;
-    
-    alpha = phi1 * kDegrad;
-    x     = x1 * TMath::Cos(alpha);
-    y     = x1 * TMath::Sin(alpha);
-    
-    idr = il + 36;
-    
-    AliMatrix(idrotm[idr], theta1, phi1, theta2, phi2, theta3, phi3);
-    gMC->Gspos("TSPI", il, "TPSG", x, y, z0, idrotm[idr], "ONLY");
-    
-  }
-  
-  for (iu = 1; iu <= 12; ++iu) {
-    phi1 = opu * .5 + (iu - 1) * 2. * opu;
-    theta1 = 90.;
-    phi2 = opu * .5 + 90. + (iu - 1) * 2. * opu;
-    if (phi2 > 360.) {
-      phi2 += -360.;
+    else{
+     gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
+     gGeoManager->Node("TPC_Rod",i+18,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
     }
-    theta2 = 90.;
-    phi3   = 0.;
-    theta3 = 0.;
-    
-    alpha = phi1 * kDegrad;
-    x     = x2 * TMath::Cos(alpha);
-    y     = x2 * TMath::Sin(alpha);
-    
-    idr = iu + 42;
-    
-    AliMatrix(idrotm[idr], theta1, phi1, theta2, phi2, theta3, phi3);
-    gMC->Gspos("TSPO", iu, "TPSG", x, y, z0, idrotm[idr], "ONLY");
+    r=254.25;
+    x=r * TMath::Cos(angle);
+    y=r * TMath::Sin(angle);
+    upar[2]=126.54; //upper
+    z=127.06;
+    gGeoManager->Node("TPC_Rod",i+36,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
+    gGeoManager->Node("TPC_Rod",i+54,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
   }
-  // -------------------------------------------------------- 
-  //       endcap cover (C, 0.86% X0) 
-  // -------------------------------------------------------- 
-  dm[0] = 76.+0.09776;
-  dm[1] = 257.;
-  dm[2] = 0.16168*0.5;
-  
-  gMC->Gsvolu("TCOV", "TUBE", idtmed[407], dm, 3);
-  
-  z0 = z_side - dm[2];
-  
-  gMC->Gspos("TCOV", 1, "TPSG", 0, 0, z0, 0, "ONLY");
-  // -------------------------------------------------------- 
-  //         put the readout chambers into the TPC 
-  // -------------------------------------------------------- 
-  theta1 = 90.;
-  phi1   = 0.;
-  theta2 = 90.;
-  phi2   = 270.;
-  theta3 = 180.;
-  phi3   = 0.;
-  
-  AliMatrix(idrotm[55], theta1, phi1, theta2, phi2, theta3, phi3);
-  
-  z0 = z_side + 250.;
-  
-  gMC->Gspos("TPSG", 1, "TPC ", 0, 0, z0, 0, "ONLY");
-  gMC->Gspos("TPSG", 2, "TPC ", 0, 0, -z0, idrotm[55], "ONLY");
-  // --------------------------------------------------------- 
-  //     outer gas insulation (CO2) 
-  // --------------------------------------------------------- 
-  dm[0] = 257.+0.09776;
-  dm[1] = 278.-0.25004;
-  dm[2] = 275.-23.;
-  
-  gMC->Gsvolu("TPOI", "TUBE", idtmed[406], dm, 3);
-  
-  gMC->Gspos("TPHV", 1, "TGAS", 0, 0, 0, 0, "ONLY");
-  gMC->Gspos("TGAS", 1, "TPC ", 0, 0, 0, 0, "ONLY");
-  gMC->Gspos("TPOI", 1, "TPC ", 0, 0, 0, 0, "ONLY");
-  
-  gMC->Gspos("TPC ", 1, "ALIC", 0, 0, 0, 0, "ONLY");
-  // ====================================================== 
-  //      all volumes below are positioned in ALIC 
-  // ====================================================== 
-  // ------------------------------------------------------ 
-  //        the last parts of the smaller wheel (TSWS) 
-  // ------------------------------------------------------ 
-  dm[0] = 74.;
-  dm[1] = 76.;
-  dm[2] = 1.;
-  
-  z0 = 253.;
-  
-  gMC->Gsposp("TSWS", 10, "TPC ", 0, 0, z0, 0, "ONLY", dm, 3);
-  gMC->Gsposp("TSWS", 11, "TPC ", 0, 0, -z0, 0, "ONLY", dm, 3);
-  
-  dm[0] = 70.;
-  
-  z0 += 21.;
-  
-  gMC->Gsposp("TSWS", 12, "TPC ", 0, 0, z0, 0, "ONLY", dm, 3);
-  gMC->Gsposp("TSWS", 13, "TPC ", 0, 0, -z0, 0, "ONLY", dm, 3);
-  // ---------------------------------------------------- 
-  //             Inner vessel (PCON) 
-  //   This volume is to be positioned directly in ALIC 
-  // ---------------------------------------------------- 
-  dm[0] = 0.;
-  dm[1] = 360.;
-  dm[2] = 4.;
-  
-  dm[3] = -250.;
-  dm[4] = 75.;
-  dm[5] = 76.;
-  
-  dm[6] = -64.5;
-  dm[7] = 50.;
-  dm[8] = 76.;
-  
-  dm[9] = 64.5;
-  dm[10] = 50.;
-  dm[11] = 76.;
-  
-  dm[12] = 250.;
-  dm[13] = 75.;
-  dm[14] = 76.;
-  
-  gMC->Gsvolu("TPIV", "PCON", idtmed[407], dm, 15);
-  // -------------------------------------------------------- 
-  //     fill the inner vessel with CO2, (HV kDegrader) 
-  //     cone parts have different thickness 
-  //     than the central barrel, according to the TP 
-  // -------------------------------------------------------- 
-  tana = 75./185.5;
-  
-  dm[0] = 0.;
-  dm[1] = 360.;
-  dm[2] = 6.;
-  
-  dm[3] = -(250.-0.2162);
-  dm[4] = (185.5-0.2126)*tana+0.2126;
-  dm[5] = 76-0.001;
-  
-  dm[6] = -64.5;
-  dm[7] = 50.+0.2162;
-  dm[8] = 76-0.001;
-  
-  dm[9]  = -64.5;
-  dm[10] = 50+0.05076;
-  dm[11] = 76-0.001;
-  
-  dm[12] = 64.5;
-  dm[13] = 50+0.05076;
-  dm[14] = 76-0.001;
-  
-  dm[15] = 64.5;
-  dm[16] = 50.+0.2162;
-  dm[17] = 76-0.001;
-  
-  dm[18] = (250.-0.2162);
-  dm[19] = (185.5-0.2126)*tana+0.2126;
-  dm[20] = 76-0.001;
-  
-  gMC->Gsvolu("TPVD", "PCON", idtmed[406], dm, 21);
-  
-  gMC->Gspos("TPVD", 1, "TPIV", 0, 0, 0, 0, "ONLY");
+
+  TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
+  alice->AddNode(v1,1);
   
-  gMC->Gspos("TPIV", 1, "ALIC", 0, 0, 0, 0, "ONLY");
-  // --------------------------------------------------- 
-  //               volumes ordering 
-  // --------------------------------------------------- 
-  gMC->Gsord("TPSG", 6);
-}
+
+} // end of function
+
 
 //_____________________________________________________________________________
 void AliTPCv0::CreateMaterials()
@@ -539,32 +859,88 @@ void AliTPCv0::DrawDetector()
   gMC->Gsatt("ALIC","SEEN",0);
   //
   // Set the volumes visible
-  gMC->Gsatt("TPC","SEEN",0);
-  gMC->Gsatt("TGAS","SEEN",0);
-  gMC->Gsatt("TPSG","SEEN",0);
-  gMC->Gsatt("TPHV","SEEN",1);
-  gMC->Gsatt("TRCS","SEEN",1);
-  gMC->Gsatt("TRCL","SEEN",1);
-  gMC->Gsatt("TSWS","SEEN",1);
-  gMC->Gsatt("TPW1","SEEN",1);
-  gMC->Gsatt("TPW2","SEEN",1);
-  gMC->Gsatt("TPW3","SEEN",1);
-  gMC->Gsatt("TPW4","SEEN",1);
-  gMC->Gsatt("TSPI","SEEN",1);
-  gMC->Gsatt("TSP1","SEEN",0);
-  gMC->Gsatt("TSPO","SEEN",1);
-  gMC->Gsatt("TSP2","SEEN",0);
-  gMC->Gsatt("TSWH","SEEN",1);
-  gMC->Gsatt("TSW1","SEEN",1);
-  gMC->Gsatt("TPOI","SEEN",1);
-  gMC->Gsatt("TPIV","SEEN",1);
-  gMC->Gsatt("TPVD","SEEN",1);
+  gMC->Gsatt("TPC ","SEEN",0);
+  gMC->Gsatt("TOIN","SEEN",1);
+  gMC->Gsatt("TOIN","COLO",7);
+  gMC->Gsatt("TOCV","SEEN",1);
+  gMC->Gsatt("TOCV","COLO",4);
+  gMC->Gsatt("TSA1","SEEN",0);
+  gMC->Gsatt("TSA2","SEEN",0);
+  gMC->Gsatt("TSA3","SEEN",0);
+  gMC->Gsatt("TSA4","SEEN",0);  
+  gMC->Gsatt("TSA5","SEEN",0);
+  gMC->Gsatt("TOFC","SEEN",1);
+  gMC->Gsatt("TOFC","COLO",4);
+  gMC->Gsatt("TSA6","SEEN",0);
+  gMC->Gsatt("TSA7","SEEN",0);
+  gMC->Gsatt("TSA8","SEEN",0);    
+  gMC->Gsatt("TIIN","SEEN",1);
+  gMC->Gsatt("TIIN","COLO",7);
+  gMC->Gsatt("TII1","SEEN",0);
+  gMC->Gsatt("TIFC","SEEN",1);
+  gMC->Gsatt("TIFC","COLO",4);
+  gMC->Gsatt("TSA9","SEEN",0); 
+  gMC->Gsatt("TS10","SEEN",0);
+  gMC->Gsatt("TS11","SEEN",0);
+  gMC->Gsatt("TS12","SEEN",0);
+  gMC->Gsatt("TS13","SEEN",0);
+  gMC->Gsatt("TS14","SEEN",0);
+  gMC->Gsatt("TICC","SEEN",0);
+  gMC->Gsatt("TICM","SEEN",0);
+  gMC->Gsatt("TS15","SEEN",0);
+  gMC->Gsatt("TS16","SEEN",0);
+  gMC->Gsatt("TS17","SEEN",0);
+  gMC->Gsatt("TS18","SEEN",0);  
+  gMC->Gsatt("TS19","SEEN",0); 
+  gMC->Gsatt("TPJ1","SEEN",0);
+  gMC->Gsatt("TPJ2","SEEN",0);
+  gMC->Gsatt("TICS","SEEN",0);
+  gMC->Gsatt("TDGN","SEEN",0); 
+  gMC->Gsatt("TIRC","SEEN",0);
+  gMC->Gsatt("TIC1","SEEN",1);
+  gMC->Gsatt("TIPP","SEEN",0);
+  gMC->Gsatt("TIC3","SEEN",0);
+  gMC->Gsatt("TRCE","SEEN",0);
+  gMC->Gsatt("TPSC","SEEN",0);
+  gMC->Gsatt("TPCC","SEEN",0); 
+  gMC->Gsatt("TORC","SEEN",0);
+  gMC->Gsatt("TOPP","SEEN",0);
+  gMC->Gsatt("TOC3","SEEN",0);
+  gMC->Gsatt("TOC1","SEEN",1);
+  gMC->Gsatt("TSSW","SEEN",1);
+  gMC->Gsatt("TSWC","SEEN",1);
+  gMC->Gsatt("TSSW","COLO",3);
+  gMC->Gsatt("TSWC","COLO",3);
+  gMC->Gsatt("TSCE","COLO",6);
+  gMC->Gsatt("TSCE","SEEN",1);
+  gMC->Gsatt("TWES","SEEN",0);
+  gMC->Gsatt("TSWB","SEEN",0);
+  gMC->Gsatt("TPEL","SEEN",0);
+  gMC->Gsatt("TPMW","SEEN",1);
+  gMC->Gsatt("TESR","SEEN",1);
+  gMC->Gsatt("TPMW","COLO",12);
+  gMC->Gsatt("TIC1","COLO",5);
+  gMC->Gsatt("TOC1","COLO",5);
+  gMC->Gsatt("TESB","SEEN",0);
+  gMC->Gsatt("THVM","SEEN",1);
+  gMC->Gsatt("THVM","COLO",11);
+  gMC->Gsatt("THVH","SEEN",0);
+  gMC->Gsatt("TPSR","SEEN",0); 
+  gMC->Gsatt("THVL","SEEN",0);
+  gMC->Gsatt("THVC","SEEN",0);  
+  gMC->Gsatt("THVE","SEEN",0);
+  gMC->Gsatt("THVR","SEEN",0);
+
   //
   gMC->Gdopt("hide", "on");
   gMC->Gdopt("shad", "on");
   gMC->Gsatt("*", "fill", 7);
   gMC->SetClipBox(".");
-  gMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
+  gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
+  gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
+  gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
+  gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
+  gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
   gMC->DefaultRange();
   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
   gMC->Gdhead(1111, "Time Projection Chamber");
@@ -578,7 +954,10 @@ void AliTPCv0::Init()
   //
   // Initialise Time Projection Chamber version 0
   //
-  printf("TPC version 0 initialized\n");
+ 
+  printf("%s: *** TPC version 0 initialized***\n",ClassName()); 
+
+  //  printf("TPC version 0 initialized\n");
 }
 
 //_____________________________________________________________________________