]> git.uio.no Git - u/mrichter/AliRoot.git/blobdiff - MUON/AliMUONSt2GeometryBuilderV2.cxx
uniformize name of newer histograms added for primary decays with other existing...
[u/mrichter/AliRoot.git] / MUON / AliMUONSt2GeometryBuilderV2.cxx
index 46221614a43d3a6b3d54f646b61c3e949bd112ba..c86f3076712e352784844244a2c3dff3d8788b85 100644 (file)
  **************************************************************************/
 
 // $Id$
-//
+
+//-----------------------------------------------------------------------------
 // Class AliMUONSt2GeometryBuilderV2
-// -------------------------------
+// ---------------------------------
 // MUON Station2 coarse geometry construction class.
-// Extracted from AliMUONv1
-// Dummy version of station 2 with the right DE id (Ch. Finck)
+// Author: SANJOY PAL ,Prof. SUKALYAN CHATTOPADHAYAY  [SINP, KOLKATA]
+//         &  Dr.SHAKEEL AHMAD (AMU), INDIA
+//-----------------------------------------------------------------------------
 
 
 #include <TVirtualMC.h>
 #include <TGeoMatrix.h>
+#include <Riostream.h>
+#include <TArrayI.h>
 
+#include "AliRun.h"
 #include "AliLog.h"
 
 #include "AliMUONSt2GeometryBuilderV2.h"
 #include "AliMUON.h"
-#include "AliMUONChamber.h"
+#include "AliMUONConstants.h"
 #include "AliMUONGeometryModule.h"
 #include "AliMUONGeometryEnvelopeStore.h"
+#include "AliMUONConstants.h"
+
+#define PI 3.14159
 
+/// \cond CLASSIMP
 ClassImp(AliMUONSt2GeometryBuilderV2)
+/// \endcond
 
 //______________________________________________________________________________
 AliMUONSt2GeometryBuilderV2::AliMUONSt2GeometryBuilderV2(AliMUON* muon)
- : AliMUONVGeometryBuilder("st2V2.dat",
-                           muon->Chamber(2).GetGeometry(), 
-                          muon->Chamber(3).GetGeometry()),
+ : AliMUONVGeometryBuilder(2, 2),
    fMUON(muon)
 {
-// Standard constructor
+/// Standard constructor
 
 }
 
@@ -51,36 +59,13 @@ AliMUONSt2GeometryBuilderV2::AliMUONSt2GeometryBuilderV2()
  : AliMUONVGeometryBuilder(),
    fMUON(0)
 {
-// Default constructor
+/// Default constructor
 }
 
-
 //______________________________________________________________________________
-AliMUONSt2GeometryBuilderV2::AliMUONSt2GeometryBuilderV2(const AliMUONSt2GeometryBuilderV2& rhs)
-  : AliMUONVGeometryBuilder(rhs)
+AliMUONSt2GeometryBuilderV2::~AliMUONSt2GeometryBuilderV2() 
 {
-// Protected copy constructor
-
-  AliFatal("Copy constructor is not implemented.");
-}
-
-//______________________________________________________________________________
-AliMUONSt2GeometryBuilderV2::~AliMUONSt2GeometryBuilderV2() {
-//
-}
-
-//______________________________________________________________________________
-AliMUONSt2GeometryBuilderV2& 
-AliMUONSt2GeometryBuilderV2::operator = (const AliMUONSt2GeometryBuilderV2& rhs) 
-{
-// Protected assignement operator
-
-  // check assignement to self
-  if (this == &rhs) return *this;
-
-  AliFatal("Assignment operator is not implemented.");
-    
-  return *this;  
+/// Destructor
 }
 
 //
@@ -88,9 +73,9 @@ AliMUONSt2GeometryBuilderV2::operator = (const AliMUONSt2GeometryBuilderV2& rhs)
 //
 
 //______________________________________________________________________________
-void AliMUONSt2GeometryBuilderV2::CreateGeometry() 
+void AliMUONSt2GeometryBuilderV2::CreateGeometry()
 {
-// From AliMUONv1::CreateGeometry()
+/// Geometry construction
 
 //
 //********************************************************************
@@ -100,139 +85,726 @@ void AliMUONSt2GeometryBuilderV2::CreateGeometry()
      // iChamber (first chamber) kept for other quanties than Z,
      // assumed to be the same in both chambers
 
-     // Get tracking medias Ids     
+     // Get tracking medias Ids
      Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
-     Int_t idAir= idtmed[1100]; // medium 1
-  //     Int_t idAlu1=idtmed[1103]; // medium 4
-     //     Int_t idAlu2=idtmed[1104]; // medium 5
-     Int_t idGas=idtmed[1108];  // medium 9 = Ar-CO2 gas (80%+20%)
-
-     const Float_t kDeltaQuad = 0.01;//2.6; dummy value til we find the good value
-     const Float_t kDeltaZ = 6.5/2.;
-
-     // Rotation matrices in the x-y plane  
-     // phi= 0 deg
-     Int_t irot1;
-     fMUON->AliMatrix(irot1,  90.,   0., 90.,  90., 0., 0.);
-     // phi= 90 deg
-     Int_t irot2;
-     fMUON->AliMatrix(irot2,  90.,  90., 90., 180., 0., 0.);
-
-     AliMUONChamber* iChamber = &fMUON->Chamber(2);
-     //     AliMUONChamber* iChamber1 = iChamber;
-     //     AliMUONChamber* iChamber2 = &fMUON->Chamber(3);
+     Int_t idAir  = idtmed[1100]; // medium 1
+     Int_t idGas  = idtmed[1108]; // medium Ar-CO2 gas (80%+20%)
+     Int_t idPCB  = idtmed[1122]; // medium FR4
+     Int_t idCU   = idtmed[1110]; // medium copper
+     Int_t idRoha = idtmed[1113]; // medium roha cell
+     Int_t idPGF30= idtmed[1123]; // medium for Frame Eq.to Bakelite
+     //Int_t idScru = idtmed[1128]; // screw material - Stainless Steel(18%Cr,9%Ni,Fe)
+
+
+
+/*########################################################################################
+    Create volume for one Quadrant
+##########################################################################################*/
+     Float_t tpar1[5];
+     tpar1[0] = 20.55;
+     tpar1[1] = 123.5;
+     tpar1[2] = 6.8/2;
+     tpar1[3] = -12.0;
+     tpar1[4] = 102.0;
+
+
+     TVirtualMC::GetMC()->Gsvolu("SQM3","TUBS", idAir, tpar1, 5);
+     TVirtualMC::GetMC()->Gsvolu("SQM4","TUBS", idAir, tpar1, 5);
+
+
+//==================================================================================
+//                                Plane      
+//==================================================================================
+
+//Thickness of variour parts
+  Float_t zCu   = 0.005;      // eff. cu in cathode pcb
+  Float_t zCbb  = 0.04;       //cathode pcb
+  Float_t zRoha = 2.5;        // Rhocell
+  Float_t zMeb = 0.04;      //Mech. exit board //0.08
+  Float_t zEeb = 0.04;     //Effective electronic readout board //0.02
+
+  //starting Z-positions of various parts--- in Plane-1
+  Float_t zposCu    = 0.25;   // 2.5 mm => gap between anode & chatode plane
+  Float_t zposCbb   = zposCu + zCu;
+  Float_t zposRoha  = zposCbb + zCbb;
+  Float_t zposMeb   = zposRoha + zRoha;
+  Float_t zposEeb   = zposMeb + zMeb;
+
+  Float_t zposCuBar   = zposCu +  zCu/2.; //for segment 0 & 6
+  Float_t zposCbbBar  = zposCbb + zCbb/2.;  
+  Float_t zposRohaBar = zposRoha + zRoha/2.;
+  Float_t zposMebBar  = zposMeb + zMeb/2.;
+  Float_t zposEebBar  = zposEeb + zEeb/2.;
+
+
+ //Cathode PCB + Copper sheet + Rohacell + mech exit board + eff. electronic exit board
+
+ //Segment-0 ~~~Horizantal box  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  Float_t bparH[3];
+  bparH[0] = 95.5/2.; // extension beyond 0 deg in x direction // 94.5
+  bparH[1] = 1.2/2.;  // extension beyond 0 deg in y direction (3.7[total extn] - 2.5[frame dim])
+  bparH[2] = zCu/2.;     //Thickness of Copper sheet
+  TVirtualMC::GetMC()->Gsvolu("SCU0L", "BOX", idCU, bparH, 3);
+  
+  bparH[2] = zCbb/2.; // thickness of cathode sheet in z direction
+  TVirtualMC::GetMC()->Gsvolu("SCB0L", "BOX", idPCB, bparH, 3);
+  
+  bparH[2] = zRoha/2.;     //Thickness of Roha cell
+  TVirtualMC::GetMC()->Gsvolu("SRH0L", "BOX", idRoha, bparH, 3);
+
+  bparH[2] = zMeb/2;       //Thickness of mechanical exit board
+  TVirtualMC::GetMC()->Gsvolu("SMB0L", "BOX", idPCB, bparH, 3);
+  
+  bparH[2] = zEeb/2;          //Thickness of effective electronic  exit board
+  TVirtualMC::GetMC()->Gsvolu("SEB0L", "BOX", idCU, bparH, 3);
+  
+  //Segment-1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  Float_t pgpar[10]; // polygon
+  pgpar[0] = 0.;  // initial angle
+  pgpar[1] = 90.; // increment in angle starting from initial angle 
+  pgpar[2] = 5;   // number of side
+  pgpar[3] = 2.; // number of plane
+  pgpar[4] = -zCu/2.; // z-position of the first plane
+  pgpar[5] = 23.1; // innner radius first plane
+  pgpar[6] = 117.6;  // outer radious first plane
+  pgpar[7] = zCu/2.; // z-position of the second plane
+  pgpar[8] = pgpar[5];  // innner radius of second plane
+  pgpar[9] = pgpar[6];  // outer radious of second plane
+  TVirtualMC::GetMC()->Gsvolu("SCU1L", "PGON", idCU, pgpar, 10);
+
+  pgpar[4] = -zCbb/2.; // z-position of the first plane
+  pgpar[7] = zCbb/2.;  // Thickness of copper-sheet
+  TVirtualMC::GetMC()->Gsvolu("SCB1L", "PGON", idPCB, pgpar, 10);  
+  
+  pgpar[4] = -zRoha/2.;  // Thickness of Roha cell
+  pgpar[7] = zRoha/2.;  // Thickness of Roha cell
+  TVirtualMC::GetMC()->Gsvolu("SRH1L", "PGON", idRoha, pgpar, 10);
+       
+  pgpar[4] = -zMeb/2.;  // Thickness of mechanical exit board
+  pgpar[7] = zMeb/2.;  // Thickness of mechanical exit board
+  TVirtualMC::GetMC()->Gsvolu("SMB1L", "PGON", idPCB, pgpar, 10);
+  
+  pgpar[4] = -zEeb/2.;  // Thickness of electronic readout board
+  pgpar[7] = zEeb/2.;  // Thickness of electronic readout board
+  TVirtualMC::GetMC()->Gsvolu("SEB1L", "PGON", idCU, pgpar, 10);
+       
+
+//Segment-2 - vertical box (simalar to horizontal bar as in Segment 0)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+       
+  Float_t bparV[3];
+  
+  bparV[0] = 1.0/2.;
+  bparV[1] = 95.5/2.; // 94.5
+  bparV[2] = zCu/2.;
+  TVirtualMC::GetMC()->Gsvolu("SCU2L", "BOX", idCU, bparV, 3);
+  
+  bparV[2] = zCbb/2.;
+  TVirtualMC::GetMC()->Gsvolu("SCB2L", "BOX", idPCB, bparV, 3);
+  
+  
+  bparV[2] = zRoha/2.;
+  TVirtualMC::GetMC()->Gsvolu("SRH2L", "BOX", idRoha, bparV, 3);
+  
+  bparV[2] = zMeb/2;
+  TVirtualMC::GetMC()->Gsvolu("SMB2L", "BOX", idPCB, bparV, 3);
+  
+  bparV[2] = zEeb/2;
+  TVirtualMC::GetMC()->Gsvolu("SEB2L", "BOX", idCU, bparV, 3);
+       
+  //....(Setting posion of Segment 0,1,2)..................................................................
+  
+  Float_t xposHorBox =  bparH[0] + 23.1; // 23.1 = 20.6(inner radius of qrd) + 2.5 (width of frame)
+  Float_t yposHorBox = -bparH[1];  
+  
+  Float_t xposVerBox = -bparV[0];
+  Float_t yposVerBox =  bparV[1] + 23.1;
+  
+  
+  //Positioning the PCB
+  
+  
+  // chamber 3
+  TVirtualMC::GetMC()->Gspos("SCB0L",1, "SQM3",xposHorBox,yposHorBox,zposCbbBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCB1L",1, "SQM3", 0.0,0.0,zposCbbBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCB2L",1, "SQM3",xposVerBox,yposVerBox,zposCbbBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SCB0L",2, "SQM3",xposHorBox,yposHorBox,-zposCbbBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCB1L",2, "SQM3", 0.0,0.0,-zposCbbBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCB2L",2, "SQM3",xposVerBox,yposVerBox,-zposCbbBar,0, "ONLY");
+
+  // chamber 4
+  TVirtualMC::GetMC()->Gspos("SCB0L",3, "SQM4",xposHorBox,yposHorBox,zposCbbBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCB1L",3, "SQM4", 0.0,0.0,zposCbbBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCB2L",3, "SQM4",xposVerBox,yposVerBox,zposCbbBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SCB0L",4, "SQM4",xposHorBox,yposHorBox,-zposCbbBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCB1L",4, "SQM4", 0.0,0.0,-zposCbbBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCB2L",4, "SQM4",xposVerBox,yposVerBox,-zposCbbBar,0, "ONLY");
+  
+
+  //Positioning Copper sheet
+  
+  // chamber 3
+
+  TVirtualMC::GetMC()->Gspos("SCU0L",1, "SQM3",xposHorBox,yposHorBox,zposCuBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCU1L",1, "SQM3", 0.0,0.0,zposCuBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCU2L",1, "SQM3",xposVerBox,yposVerBox,zposCuBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SCU0L",2, "SQM3",xposHorBox,yposHorBox,-zposCuBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCU1L",2, "SQM3", 0.0,0.0,-zposCuBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCU2L",2, "SQM3",xposVerBox,yposVerBox,-zposCuBar,0, "ONLY");
+
+  // chamber 4
+  TVirtualMC::GetMC()->Gspos("SCU0L",3, "SQM4",xposHorBox,yposHorBox,zposCuBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCU1L",3, "SQM4", 0.0,0.0,zposCuBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCU2L",3, "SQM4",xposVerBox,yposVerBox,zposCuBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SCU0L",4, "SQM4",xposHorBox,yposHorBox,-zposCuBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCU1L",4, "SQM4", 0.0,0.0,-zposCuBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SCU2L",4, "SQM4",xposVerBox,yposVerBox,-zposCuBar,0, "ONLY");
      
-     // Half of the total thickness of frame crosses (including DAlu)
-     // for each chamber in stations 1 and 2:
-     // 3% of X0 of composite material,
-     // but taken as Aluminium here, with same thickness in number of X0
-     //     Float_t dframez = 3. * 8.9 / 100;
-     // DGas and DAlu not changed from standard values
-     //     Double_t zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
-             // The same parameters are defined in builder for station 1 
+  //Positioning Roha cell 
+  
+  // chamber 3
+  
+  TVirtualMC::GetMC()->Gspos("SRH0L",1, "SQM3",xposHorBox,yposHorBox,zposRohaBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SRH1L",1, "SQM3", 0.0,0.0,zposRohaBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SRH2L",1, "SQM3",xposVerBox,yposVerBox,zposRohaBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SRH0L",2, "SQM3",xposHorBox,yposHorBox,-zposRohaBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SRH1L",2, "SQM3", 0.0,0.0,-zposRohaBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SRH2L",2, "SQM3",xposVerBox,yposVerBox,-zposRohaBar,0, "ONLY");
+  
+  // chamber 4
+  
+  TVirtualMC::GetMC()->Gspos("SRH0L",3, "SQM4",xposHorBox,yposHorBox,zposRohaBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SRH1L",3, "SQM4", 0.0,0.0,zposRohaBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SRH2L",3, "SQM4",xposVerBox,yposVerBox,zposRohaBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SRH0L",4, "SQM4",xposHorBox,yposHorBox,-zposRohaBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SRH1L",4, "SQM4", 0.0,0.0,-zposRohaBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SRH2L",4, "SQM4",xposVerBox,yposVerBox,-zposRohaBar,0, "ONLY");
+
+  //Positioning of Mech. exit board
+  
+  // chamber 3
+  
+  TVirtualMC::GetMC()->Gspos("SMB0L",1, "SQM3",xposHorBox,yposHorBox,zposMebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SMB1L",1, "SQM3", 0.0,0.0,zposMebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SMB2L",1, "SQM3",xposVerBox,yposVerBox,zposMebBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SMB0L",2, "SQM3",xposHorBox,yposHorBox,-zposMebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SMB1L",2, "SQM3", 0.0,0.0,-zposMebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SMB2L",2, "SQM3",xposVerBox,yposVerBox,-zposMebBar,0, "ONLY");
+  // chamber 4
+  
+  TVirtualMC::GetMC()->Gspos("SMB0L",3, "SQM4",xposHorBox,yposHorBox,zposMebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SMB1L",3, "SQM4", 0.0,0.0,zposMebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SMB2L",3, "SQM4",xposVerBox,yposVerBox,zposMebBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SMB0L",4, "SQM4",xposHorBox,yposHorBox,-zposMebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SMB1L",4, "SQM4", 0.0,0.0,-zposMebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SMB2L",4, "SQM4",xposVerBox,yposVerBox,-zposMebBar,0, "ONLY");
+  
+  //Positioning of Electronic exit board
+  
+  
+  // chamber 3
+
+  TVirtualMC::GetMC()->Gspos("SEB0L",1, "SQM3",xposHorBox,yposHorBox,zposEebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SEB1L",1, "SQM3", 0.0,0.0,zposEebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SEB2L",1, "SQM3",xposVerBox,yposVerBox,zposEebBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SEB0L",2, "SQM3",xposHorBox,yposHorBox,-zposEebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SEB1L",2, "SQM3", 0.0,0.0,-zposEebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SEB2L",2, "SQM3",xposVerBox,yposVerBox,-zposEebBar,0, "ONLY");
+  // chamber 4
+
+  TVirtualMC::GetMC()->Gspos("SEB0L",3, "SQM4",xposHorBox,yposHorBox,zposEebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SEB1L",3, "SQM4", 0.0,0.0,zposEebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SEB2L",3, "SQM4",xposVerBox,yposVerBox,zposEebBar,0, "ONLY");
+  
+  TVirtualMC::GetMC()->Gspos("SEB0L",4, "SQM4",xposHorBox,yposHorBox,-zposEebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SEB1L",4, "SQM4", 0.0,0.0,-zposEebBar,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SEB2L",4, "SQM4",xposVerBox,yposVerBox,-zposEebBar,0, "ONLY");
+  
+  
+  //----------------------------------------------------------------------
+  //                         Frames
+  //----------------------------------------------------------------------
+  //Frame-1
+
+  Float_t frame1[3] ;                
+  frame1[0] = 101.0/2.;             //100.6 = 94.5 + 2.5 + 3.6 
+  frame1[1] = 2.5/2.;               
+  frame1[2] = 5.0/2.;
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRM1", "BOX", idPGF30, frame1, 3); //Frame - 1 // fill with pkk GF30
+  
+  Float_t arib1[3];
+  arib1[0] = frame1[0];
+  arib1[1] = 0.9/2.;
+  arib1[2] =(frame1[2]-0.95)/2.0;
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRA1", "BOX", idAir, arib1, 3); // fill with air
+  
+  Float_t xposarib1 = 0;
+  Float_t yposarib1 = -frame1[1] + arib1[1];
+  Float_t zposarib1 = frame1[2] - arib1[2];
+  
+  TVirtualMC::GetMC()->Gspos("SFRA1",1, "SFRM1", xposarib1, yposarib1, zposarib1,0, "ONLY");  //replace pkk GF30 with air(b)
+  TVirtualMC::GetMC()->Gspos("SFRA1",2, "SFRM1", xposarib1, yposarib1, -zposarib1,0, "ONLY"); //replace pkk GF30 with air(nb)
+  
+  Float_t rrib1[3];
+  rrib1[0] = frame1[0];
+  rrib1[1] = 0.6/2.;
+  rrib1[2] =(frame1[2]-0.95)/2.0;
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRR1", "BOX", idRoha, rrib1, 3); // fill with rohacell
+  
+  Float_t xposrrib1 = 0.0;
+  Float_t yposrrib1 = frame1[1] - rrib1[1];
+  Float_t zposrrib1 = frame1[2] - rrib1[2];
+  
+  TVirtualMC::GetMC()->Gspos("SFRR1",1, "SFRM1", xposrrib1, yposrrib1, zposrrib1,0, "ONLY");//replace pkk GF30 with rohacell
+  TVirtualMC::GetMC()->Gspos("SFRR1",2, "SFRM1", xposrrib1, yposrrib1, -zposrrib1,0, "ONLY");//replace pkk GF30 with rohacell
+  
+  
+  Float_t xposFr1 = frame1[0] + 20.6;
+  Float_t yposFr1 = -3.7 + frame1[1] ;
+  Float_t zposFr1 = 0.0;
+  
+  TVirtualMC::GetMC()->Gspos("SFRM1",1, "SQM3", xposFr1, yposFr1, zposFr1,0, "ONLY");// frame -1
+  TVirtualMC::GetMC()->Gspos("SFRM1",2, "SQM4", xposFr1, yposFr1, zposFr1,0, "ONLY");// frame -1
+  
+  
+  //......................................................................................
+  //Frame-2
+
+  Float_t frame2[3]; 
+  frame2[0] = 4.0/2.;
+  frame2[1] = 1.2/2.;
+  frame2[2] = 5.0/2;
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRM2", "BOX", idPGF30, frame2, 3); //Frame - 2
+  
+  Float_t rrib2[3];
+  rrib2[0] = frame2[0]-1.0/2.0;
+  rrib2[1] = frame2[1];
+  rrib2[2] =(frame2[2]-0.95)/2.0;
+
+  TVirtualMC::GetMC()->Gsvolu("SFRR2", "BOX", idRoha, rrib2, 3);
+      
+  Float_t xposrrib2 = -1.0/2.0;
+  Float_t yposrrib2 = 0.0;
+  Float_t zposrrib2 = frame2[2] - rrib2[2];
+  
+  TVirtualMC::GetMC()->Gspos("SFRR2",1, "SFRM2", xposrrib2, yposrrib2, zposrrib2,0, "ONLY");//replace pkk GF30 with rohacell
+  TVirtualMC::GetMC()->Gspos("SFRR2",2, "SFRM2", xposrrib2, yposrrib2, -zposrrib2,0, "ONLY");//replace pkk GF30 with roha
+  
+
+  
+  Float_t xposFr2 = frame2[0] + 117.6;
+  Float_t yposFr2 = -frame2[1];
+  Float_t zposFr2 = 0.0;
+  
+  TVirtualMC::GetMC()->Gspos("SFRM2",1, "SQM3", xposFr2, yposFr2, zposFr2,0, "MANY");//global positing of frame in SQM3
+  TVirtualMC::GetMC()->Gspos("SFRM2",2, "SQM4", xposFr2, yposFr2, zposFr2,0, "MANY");//global positing of frame in SQM4
+  
+  
+  //......................................................................................
+  
+  //Frame-3
+  
+  Float_t pgparFr3[10];
+  pgparFr3[0] = 0.;
+  pgparFr3[1] = 90.;
+  pgparFr3[2] = 5;
+  pgparFr3[3] = 2.;
+  pgparFr3[4] = 0.;
+  pgparFr3[5] = 117.6;
+  pgparFr3[6] = 121.6;
+  pgparFr3[7] = pgparFr3[4] + 5.0;
+  pgparFr3[8] = pgparFr3[5];
+  pgparFr3[9] = pgparFr3[6];
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRM3", "PGON", idPGF30, pgparFr3, 10);
+  
+  Float_t pgparRrib3[10];
+  pgparRrib3[0] = 0.;
+  pgparRrib3[1] = 90.;
+  pgparRrib3[2] = 5;
+  pgparRrib3[3] = 2.;
+  pgparRrib3[4] = 0.;
+  pgparRrib3[5] = 117.6;
+  pgparRrib3[6] = 120.6;
+  pgparRrib3[7] = pgparRrib3[4] +1.55 ;
+  pgparRrib3[8] = pgparRrib3[5];
+  pgparRrib3[9] = pgparRrib3[6];
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRR3", "PGON", idRoha, pgparRrib3, 10);
+  
+  Float_t xposrrib3 = 0.0;
+  Float_t yposrrib3 = 0.0;
+  Float_t zposrrib3 = 0.0;
+
+  TVirtualMC::GetMC()->Gspos("SFRR3",1, "SFRM3", xposrrib3, yposrrib3, zposrrib3,0, "ONLY");
+  
+  zposrrib3 = 3.45;
+  
+  TVirtualMC::GetMC()->Gspos("SFRR3",2, "SFRM3", xposrrib3, yposrrib3, zposrrib3,0, "ONLY");
+  
+      
+  
+  Float_t xposFr3 = 0.0;
+  Float_t yposFr3 = 0.0;
+  Float_t zposFr3 = -frame1[2];
+      
+  TVirtualMC::GetMC()->Gspos("SFRM3",1, "SQM3", xposFr3, yposFr3, zposFr3,0, "ONLY");// frame -1
+  TVirtualMC::GetMC()->Gspos("SFRM3",2, "SQM4", xposFr3, yposFr3, zposFr3,0, "ONLY");// frame -1
+  
+  
+  //......................................................................................
+  //Frame-4
+  
+  Float_t frame4[3]; 
+  frame4[0] = 1.0/2.;
+  frame4[1] = 4.0/2.;
+  frame4[2] = frame1[2];
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRM4", "BOX", idPGF30, frame4, 3); 
+  
+  Float_t rrib4[3];
+  rrib4[0] = frame4[0];
+  rrib4[1] = frame4[1]-1.0/2;
+  rrib4[2] =(frame4[2]-0.95)/2.0;
+
+  TVirtualMC::GetMC()->Gsvolu("SFRR4", "BOX", idRoha, rrib4, 3);
+  
+  Float_t xposrrib4 = 0.0;
+  Float_t yposrrib4 = -1.0/2;
+  Float_t zposrrib4 = frame4[2] - rrib4[2];
+  
+  TVirtualMC::GetMC()->Gspos("SFRR4",1, "SFRM4", xposrrib4, yposrrib4, zposrrib4,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SFRR4",2, "SFRM4", xposrrib4, yposrrib4, -zposrrib4,0, "ONLY");
+  
+
+  
+  Float_t xposFr4 = -frame4[0];
+  Float_t yposFr4 = -frame4[1] + 117.6;
+  Float_t zposFr4 = 0.0;
+  
+  TVirtualMC::GetMC()->Gspos("SFRM4",1, "SQM3", xposFr4, yposFr4, zposFr4,0, "MANY");
+  TVirtualMC::GetMC()->Gspos("SFRM4",2, "SQM4", xposFr4, yposFr4, zposFr4,0, "MANY");
+  
+  
+  //......................................................................................
+  //Frame-5
+  Float_t frame5[3] ;               
+  frame5[0] = 2.7/2.;            
+  frame5[1] = 101.0/2.;              
+  frame5[2] = 5.0/2.;
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRM5", "BOX", idPGF30, frame5, 3); //Frame - 1
+      
+  Float_t arib5[3];
+  arib5[0] = 0.9/2.0;
+  arib5[1] = frame5[1];
+  arib5[2] = (frame5[2]-0.95)/2.0;
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRA5", "BOX", idAir, arib5, 3);
+  
+  Float_t xposarib5 = -frame5[0] + arib5[0];
+  Float_t yposarib5 = 0.0;
+  Float_t zposarib5 = frame5[2] - arib5[2];
+      
+  TVirtualMC::GetMC()->Gspos("SFRA5",1, "SFRM5", xposarib5, yposarib5, zposarib5,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SFRA5",2, "SFRM5", xposarib5, yposarib5, -zposarib5,0, "ONLY");
+  
+  Float_t rrib5[3];
+  rrib5[0] = 0.8/2.0;
+  rrib5[1] = frame5[1];
+  rrib5[2] = (frame5[2]-0.95)/2.0;
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRR5", "BOX", idRoha, rrib5, 3);
+  
+  Float_t xposrrib5 = frame5[0] - rrib5[0];
+  Float_t yposrrib5 = 0.0;
+  Float_t zposrrib5 = frame5[2] - rrib5[2];
+  
+  TVirtualMC::GetMC()->Gspos("SFRR5",1, "SFRM5", xposrrib5, yposrrib5, zposrrib5,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SFRR5",2, "SFRM5", xposrrib5, yposrrib5, -zposrrib5,0, "ONLY");
+  
+  Float_t xposFr5 = -3.7 + frame5[0];
+  Float_t yposFr5 = frame5[1] + 20.6;
+  Float_t zposFr5 = 0.0;
+  
+  TVirtualMC::GetMC()->Gspos("SFRM5",1, "SQM3", xposFr5, yposFr5, zposFr5,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SFRM5",2, "SQM4", xposFr5, yposFr5, zposFr5,0, "ONLY");
+  
+  //......................................................................................
+  //Frame -6 
+  
+  Float_t frame6[3]; 
+  frame6[0] = 1.0/2.;
+  frame6[1] = 2.5/2.;
+  frame6[2] = frame1[2];
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRM6", "BOX", idPGF30, frame6, 3); 
+  
+  Float_t rrib6[3];
+  rrib6[0] = frame6[0];
+  rrib6[1] = 1.5/2.;
+  rrib6[2] =(frame2[2]-0.95)/2.0;
+
+  TVirtualMC::GetMC()->Gsvolu("SFRR6", "BOX", idRoha, rrib6, 3);
+  
+  Float_t xposrrib6 = 0.0;
+  Float_t yposrrib6 = 1.0/2.0;
+  Float_t zposrrib6 = frame6[2] - rrib6[2];
+
+  TVirtualMC::GetMC()->Gspos("SFRR6",1, "SFRM6", xposrrib6, yposrrib6, zposrrib6,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SFRR6",2, "SFRM6", xposrrib6, yposrrib6, -zposrrib6,0, "ONLY");
+  
+  
+  
+  Float_t xposFr6 = -frame6[0];
+  Float_t yposFr6 = frame6[1] + 20.6;
+  Float_t zposFr6 = 0.0;
+
+  TVirtualMC::GetMC()->Gspos("SFRM6",1, "SQM3", xposFr6, yposFr6, zposFr6,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SFRM6",2, "SQM4", xposFr6, yposFr6, zposFr6,0, "ONLY");
+  
+  
+//......................................................................................
+//Frame - 7 inner pgon
+  
+  Float_t pgparFr7[10];
+  pgparFr7[0] = 0.;
+  pgparFr7[1] = 90.;
+  pgparFr7[2] = 5;
+  pgparFr7[3] = 2.;
+  pgparFr7[4] = 0.;
+  pgparFr7[5] = 20.6;
+  pgparFr7[6] = 23.1;
+  pgparFr7[7] = pgparFr7[4] + 5.0;
+  pgparFr7[8] = pgparFr7[5];
+  pgparFr7[9] = pgparFr7[6];
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRM7", "PGON", idPGF30, pgparFr7, 10);
+  
+  Float_t pgparRrib7[10];
+  pgparRrib7[0] = 0.;
+  pgparRrib7[1] = 90.;
+  pgparRrib7[2] = 5;
+  pgparRrib7[3] = 2.;
+  pgparRrib7[4] = 0.;
+  pgparRrib7[5] = 21.6;
+  pgparRrib7[6] = 23.1;
+  pgparRrib7[7] = pgparRrib7[4] + 1.55;
+  pgparRrib7[8] = pgparRrib7[5];
+  pgparRrib7[9] = pgparRrib7[6];
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRR7", "PGON", idRoha, pgparRrib7, 10);
+  
+  Float_t xposrrib7 = 0.0;
+  Float_t yposrrib7 = 0.0;
+  Float_t zposrrib7 = 0.0;
+  
+  TVirtualMC::GetMC()->Gspos("SFRR7",1, "SFRM7", xposrrib7, yposrrib7, zposrrib7,0, "ONLY");
+  
+  zposrrib7 = 3.45;
+  
+  TVirtualMC::GetMC()->Gspos("SFRR7",2, "SFRM7", xposrrib7, yposrrib7, zposrrib7,0, "ONLY");
+  
+  Float_t xposFr7 = 0.0;
+  Float_t yposFr7 = 0.0;
+  Float_t zposFr7 = -frame1[2];
+  
+  TVirtualMC::GetMC()->Gspos("SFRM7",1, "SQM3", xposFr7, yposFr7, zposFr7,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SFRM7",2, "SQM4", xposFr7, yposFr7, zposFr7,0, "ONLY");
+  
+  
+  //......................................................................................
+  //Frame - 8 
+
+  
+  Float_t frame8[3] ;
+  frame8[0] = 2.5/2.0;
+  frame8[1] = 1.2/2.0;
+  frame8[2] = frame1[2];
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRM8", "BOX", idPGF30, frame8, 3); //Frame - 2
+      
+  Float_t rrib8[3];
+  rrib8[0] = frame8[0]-1.0/2;
+  rrib8[1] = frame8[1];
+  rrib8[2] =(frame8[2]-0.95)/2.0;
+  
+  TVirtualMC::GetMC()->Gsvolu("SFRR8", "BOX", idRoha, rrib8, 3);
+  
+  Float_t xposrrib8 = -1.0/2;
+  Float_t yposrrib8 = 0.0;
+  Float_t zposrrib8 = frame8[2] - rrib8[2];
+  
+  TVirtualMC::GetMC()->Gspos("SFRR8",1, "SFRM8", xposrrib8, yposrrib8, zposrrib8,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SFRR8",2, "SFRM8", xposrrib8, yposrrib8, -zposrrib8,0, "ONLY");
+  
+  
+  
+  Float_t xposFr8 = frame8[0] + 20.6;
+  Float_t yposFr8 = -frame8[1];
+  Float_t zposFr8 = 0.0;
+  
+  TVirtualMC::GetMC()->Gspos("SFRM8",1, "SQM3", xposFr8, yposFr8, zposFr8,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SFRM8",2, "SQM4", xposFr8, yposFr8, zposFr8,0, "ONLY");
+  
+  
+  
+
+  //^^^^^^^^^^^^^^^^^^^^^^^^^ Sensitive volumes ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  
+  Float_t zsenv = 0.5; // distance between two cathode plane
+  
+  //Segment-0 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  bparH[0] = 94.5/2.;
+  bparH[1] = 1.2/2.;
+  bparH[2] = zsenv/2.;
+  TVirtualMC::GetMC()->Gsvolu("SC3G0", "BOX", idGas, bparH, 3);
+  TVirtualMC::GetMC()->Gsvolu("SC4G0", "BOX", idGas, bparH, 3);
+  
+ //Segment-1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  pgpar[0] = 0.;
+  pgpar[1] = 90.;
+  pgpar[2] = 5;
+  pgpar[3] = 2.;
+  pgpar[4] = -zsenv/2.;
+  pgpar[5] = 23.1;
+  pgpar[6] = 117.6;
+  pgpar[7] = zsenv/2.;
+  pgpar[8] = pgpar[5];
+  pgpar[9] = pgpar[6];
+  TVirtualMC::GetMC()->Gsvolu("SC3G1", "PGON", idGas, pgpar, 10);
+  TVirtualMC::GetMC()->Gsvolu("SC4G1", "PGON", idGas, pgpar, 10);
+  
+
+  //Segment-2 - vertical box ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  
+  bparV[0] = 1.0/2.;
+  bparV[1] = 95.5/2.;
+  bparV[2] = zsenv/2.;
+  TVirtualMC::GetMC()->Gsvolu("SC3G2", "BOX", idGas, bparV, 3);
+  TVirtualMC::GetMC()->Gsvolu("SC4G2", "BOX", idGas, bparV, 3);
+  
+  //...........................................................................................
+  
+  xposHorBox =  bparH[0] + 23.1;
+  yposHorBox = -bparH[1];
+  
+  xposVerBox = -bparV[0];
+  yposVerBox = bparV[1] + 23.1;
+  
+  TVirtualMC::GetMC()->Gspos("SC3G0",1, "SQM3", xposHorBox,yposHorBox,0.,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SC3G1",1, "SQM3", 0.,0.,0.,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SC3G2",1, "SQM3", xposVerBox,yposVerBox,0.,0, "ONLY");
+     
+  
+  TVirtualMC::GetMC()->Gspos("SC4G0",1, "SQM4", xposHorBox,yposHorBox,0.,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SC4G1",1, "SQM4", 0.,0.,0.,0, "ONLY");
+  TVirtualMC::GetMC()->Gspos("SC4G2",1, "SQM4", xposVerBox,yposVerBox,0.,0, "ONLY");
      
-     // Mother volume
-     // Outer excess and inner recess for mother volume radius
-     // with respect to ROuter and RInner
-     //     Float_t dframep=.001; // Value for station 3 should be 6 ...
-     // Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
-     // Float_t dframep1=.001;
-     //     Float_t phi=2*TMath::Pi()/12/2;
-             // The same parameters are defined in builder for station 1 (30deg)
-
-     Float_t tpar[5];
-     //     Double_t dstation = (-iChamber2->Z()) - (-iChamber1->Z());
-
-
-     Float_t posx, posy, posz;
-//   Chamber Material represented by Alu sheet
-     tpar[0]= iChamber->RInner();
-     tpar[1]= iChamber->ROuter();
-     tpar[2] = (iChamber->DGas())/2;
-     tpar[3] = 0.;
-     tpar[4] = 90.;
-  
-//     
-//   Sensitive volumes
-     gMC->Gsvolu("S03G", "TUBS", idGas, tpar, 5);
-     gMC->Gsvolu("S04G", "TUBS", idGas, tpar, 5);
-
-     Int_t detElemId;
-
-     posx = kDeltaQuad;
-     posy = kDeltaQuad;
-     posz = -kDeltaZ;
-
-     detElemId = 301;
-     gMC->Gsvolu("LE01", "TUBS", idAir, tpar, 5);
-     GetEnvelopes(2)->AddEnvelope("LE01", detElemId, true, TGeoTranslation(posx, posy, posz),
-                                  TGeoRotation("rot1",90,0,90,90,0,0) );
-     detElemId = 401;
-     gMC->Gsvolu("LF01", "TUBS", idAir, tpar, 5);
-     GetEnvelopes(3)->AddEnvelope("LF01", detElemId, true, TGeoTranslation(posx, posy, posz),
-                                  TGeoRotation("rot1",90,0,90,90,0,0) );
-     detElemId = 300;
-     gMC->Gsvolu("LE02", "TUBS", idAir, tpar, 5);
-     GetEnvelopes(2)->AddEnvelope("LE02", detElemId, true, TGeoTranslation(-posx, posy,-posz),
-                                 TGeoRotation("rot2",90,180,90,90,180,0) );
-     detElemId = 400;
-     gMC->Gsvolu("LF02", "TUBS", idAir, tpar, 5);
-     GetEnvelopes(3)->AddEnvelope("LF02", detElemId, true, TGeoTranslation(-posx, posy,-posz),
-                                 TGeoRotation("rot2",90,180,90,90,180,0) );
-     detElemId = 302;
-     gMC->Gsvolu("LE03", "TUBS", idAir, tpar, 5);
-     GetEnvelopes(2)->AddEnvelope("LE03", detElemId, true, TGeoTranslation(posx, -posy, -posz),
-                                 TGeoRotation("rot3",90,0,90,270,180,0) );
-     detElemId = 402;
-     gMC->Gsvolu("LF03", "TUBS", idAir, tpar, 5);
-     GetEnvelopes(3)->AddEnvelope("LF03", detElemId, true, TGeoTranslation(posx, -posy, -posz),
-                                 TGeoRotation("rot3",90,0,90,270,180,0) );
-     detElemId = 303;
-     gMC->Gsvolu("LE04", "TUBS", idAir, tpar, 5);
-     GetEnvelopes(2)->AddEnvelope("LE04", detElemId, true, TGeoTranslation(-posx, -posy, posz),
-                                 TGeoRotation("rot4",90,180,90,270,0,0) );
-     detElemId = 403;
-     gMC->Gsvolu("LF04", "TUBS", idAir, tpar, 5);
-     GetEnvelopes(3)->AddEnvelope("LF04", detElemId, true, TGeoTranslation(-posx, -posy, posz),
-                                 TGeoRotation("rot4",90,180,90,270,0,0) );
-
-     GetEnvelopes(2)->AddEnvelopeConstituent("S03G", "LE01", 1);
-     GetEnvelopes(3)->AddEnvelopeConstituent("S04G", "LF01", 1);
-
-     GetEnvelopes(2)->AddEnvelopeConstituent("S03G", "LE02", 2);
-     GetEnvelopes(3)->AddEnvelopeConstituent("S04G", "LF02", 2);
-
-     GetEnvelopes(2)->AddEnvelopeConstituent("S03G", "LE03", 3);
-     GetEnvelopes(3)->AddEnvelopeConstituent("S04G", "LF03", 3);
-
-     GetEnvelopes(2)->AddEnvelopeConstituent("S03G", "LE04", 4);
-     GetEnvelopes(3)->AddEnvelopeConstituent("S04G", "LF04", 4);
+  
+  //^^^^^^^^^^^^^^^^^^^^^^^^^ Sensitive volumes ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+
+
+//##################################################################################################
+//   Positioning Quadrant  in chamber#3 and chamber#4
+//##################################################################################################
+/******Transformations for  Quadrant**********************************************
+      ||        I  => Quadrant I:   no rotation
+      ||
+  II. || I.    II  => Quadrant II:  Reflaction of Quadrant I in XZ plane
+      ||           => TGeoRotation("Qrot2",90.,180.,90.,90.,180.,0.);
+=============
+      ||       III => Quadrant III: 180 degree rotation of Quadrant I in XY plane
+ III. || IV.       => TGeoRotation("Qrot3",90.,180.,90.,90.,180.,0.);
+      ||        IV => Quadrant IV:-180 degree rotation of Quadrant II in XY plane
+                   => TGeoRotation("Qrot4",90.,0.,90.,-90.,180.,0.);
+**********************************************************************************************/
+
+ Int_t detElemId1 =  1;  // quadrant I
+ Int_t detElemId2 =  0;  // quadrant II
+ Int_t detElemId3 =  3;  // quadrant III
+ Int_t detElemId4 =  2;  // quadrant IV
+
+ //Float_t halfChamber = zCbb + zCu + zRoha + zMeb + zEeb + zsenv/2;
+//   cout<<  "\n half_chamber \t" << half_chamber << endl;
+
+ Float_t halfChamber = tpar1[2];// tpar1[2] = 6.8/2;
+
+// ------------------------------St2 Chamber3------------------------------------------------
+
+ //    GetEnvelopes(2)->AddEnvelope("S3M0", 300, true,TGeoTranslation(0.,0.,0.));
+    GetEnvelopes(2)->AddEnvelope("SQM3", 300+detElemId1, 1, TGeoTranslation( 0., 0., - halfChamber));
+    GetEnvelopes(2)->AddEnvelope("SQM3", 300+detElemId2, 2, TGeoTranslation( 0., 0., + halfChamber),
+                                 TGeoRotation("Qrot3",90.,180.,90.,90.,180.,0.));
+    GetEnvelopes(2)->AddEnvelope("SQM3", 300+detElemId3, 3, TGeoTranslation( 0., 0., - halfChamber),
+                                  TGeoRotation("Qrot3",90.,180.,90.,270.,0.,0.));
+    GetEnvelopes(2)->AddEnvelope("SQM3", 300+detElemId4, 4, TGeoTranslation( 0., 0., + halfChamber),
+                                  TGeoRotation("Qrot4",90.,0.,90.,-90.,180.,0.));
+
+//--------------------------------St2 Chamber4-------------------------------------------------
+
+    GetEnvelopes(3)->AddEnvelope("SQM4", 400+detElemId1, 1, TGeoTranslation( 0., 0., - halfChamber));
+    GetEnvelopes(3)->AddEnvelope("SQM4", 400+detElemId2, 2, TGeoTranslation( 0., 0., + halfChamber),
+                                 TGeoRotation("Qrot2",90.,180.,90.,90.,180.,0.));
+    GetEnvelopes(3)->AddEnvelope("SQM4", 400+detElemId3, 3, TGeoTranslation( 0., 0., - halfChamber),
+                                  TGeoRotation("Qrot3",90.,180.,90.,270.,0.,0.));
+    GetEnvelopes(3)->AddEnvelope("SQM4", 400+detElemId4, 4, TGeoTranslation( 0., 0., + halfChamber),
+                                  TGeoRotation("Qrot4",90.,0.,90.,-90.,180.,0.));
+
+//**********************************************************************************************
 
 }
+//______________________________________________________________________________
+void AliMUONSt2GeometryBuilderV2::SetVolumes()
+{
+/// Defines the volumes for the station2 chambers.
+
+  if (gAlice->GetModule("SHIL")) {
+    SetMotherVolume(2, "YOUT1");
+    SetMotherVolume(3, "YOUT1");
+  }  
+
+  // Define chamber volumes as virtual
+  SetVolume(2, "SC03", true);
+  SetVolume(3, "SC04", true);
+}
 
 //______________________________________________________________________________
 void AliMUONSt2GeometryBuilderV2::SetTransformations()
 {
-// Defines the transformations for the station2 chambers.
-// ---
-
-  AliMUONChamber* iChamber1 = &fMUON->Chamber(2);
-  Double_t zpos1 = - iChamber1->Z(); 
-  iChamber1->GetGeometry()
-    ->SetTranslation(TGeoTranslation(0., 0., zpos1));
-
-  AliMUONChamber* iChamber2 = &fMUON->Chamber(3);
-  Double_t zpos2 = - iChamber2->Z(); 
-  iChamber2->GetGeometry()
-    ->SetTranslation(TGeoTranslation(0., 0., zpos2));
+/// Defines the transformations for the station2 chambers.
+
+  Double_t zpos1 = - AliMUONConstants::DefaultChamberZ(2); 
+  SetTranslation(2, TGeoTranslation(0., 0., zpos1));
+
+  Double_t zpos2 = - AliMUONConstants::DefaultChamberZ(3); 
+  SetTranslation(3, TGeoTranslation(0., 0., zpos2));
 }
 
 //______________________________________________________________________________
 void AliMUONSt2GeometryBuilderV2::SetSensitiveVolumes()
 {
-// Defines the sensitive volumes for station2 chambers.
-// ---
+/// Defines the sensitive volumes for station2 chambers.
 
-  GetGeometry(2)->SetSensitiveVolume("S03G");
-  GetGeometry(3)->SetSensitiveVolume("S04G");
+  GetGeometry(2)->SetSensitiveVolume("SC3G0");
+  GetGeometry(2)->SetSensitiveVolume("SC3G1");
+  GetGeometry(2)->SetSensitiveVolume("SC3G2");
+
+  GetGeometry(3)->SetSensitiveVolume("SC4G0");
+  GetGeometry(3)->SetSensitiveVolume("SC4G1");
+  GetGeometry(3)->SetSensitiveVolume("SC4G2");
 }
+