[u/mrichter/AliRoot.git] / MUON / AliMUONSt1GeometryBuilder.cxx

/**************************************************************************
 * 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.                  *
 **************************************************************************/

// $Id$

//-----------------------------------------------------------------------------
// Class AliMUONSt1GeometryBuilder
// -------------------------------
// MUON Station1 coarse geometry construction class.
// Extracted from AliMUONv1
// by Ivana Hrivnacova, IPN Orsay
// Included in AliRoot 2004/01/23
//-----------------------------------------------------------------------------

#include <TVirtualMC.h>
#include <TGeoMatrix.h>

#include "AliLog.h"

#include "AliMUONSt1GeometryBuilder.h"
#include "AliMUON.h"
#include "TArrayI.h"
#include "AliMUONConstants.h"
#include "AliMUONGeometryModule.h"
#include "AliMUONGeometryEnvelopeStore.h"

/// \cond CLASSIMP
ClassImp(AliMUONSt1GeometryBuilder)
/// \endcond

//______________________________________________________________________________
AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder(AliMUON* muon)
 : AliMUONVGeometryBuilder(0, 2),
   fMUON(muon)
{
/// Standard constructor

}

//______________________________________________________________________________
AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder()
 : AliMUONVGeometryBuilder(),
   fMUON(0)
{
/// Default constructor
}

//______________________________________________________________________________
AliMUONSt1GeometryBuilder::~AliMUONSt1GeometryBuilder() 
{
/// Destructor
}

//
// public methods
//

//______________________________________________________________________________
void AliMUONSt1GeometryBuilder::CreateGeometry()
{
/// From AliMUONv1::CreateGeometry()

//********************************************************************
//                            Station 1                             **
//********************************************************************
//  CONCENTRIC
     // indices 1 and 2 for first and second chambers in the station
     // iChamber (first chamber) kept for other quanties than Z,
     // assumed to be the same in both chambers

     // 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%)
     Bool_t frameCrosses=kTRUE;     

     // 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.);

     // DGas decreased from standard one (0.5)
     const Float_t kDGas = 0.4;

     // DAlu increased from standard one (3% of X0),
     // because more electronics with smaller pads
     const Float_t kDAlu = 3.5 * 8.9 / 100.;

     // 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;
     Float_t zfpos=-(kDGas+dframez+kDAlu)/2;
             // The same parameters are defined in builder for station 2 

     // 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 dframep1 = 11.0;
     Float_t phi=2*TMath::Pi()/12/2;
             // The same parameters are defined in builder for station 2 

     Float_t tpar[3];
     Float_t dstation = (-AliMUONConstants::DefaultChamberZ(1)) - 
                        (-AliMUONConstants::DefaultChamberZ(0));
     tpar[0] = AliMUONConstants::Rmin(0)-dframep; 
     tpar[1] = (AliMUONConstants::Rmax(0)+dframep)/TMath::Cos(phi);
     tpar[2] = dstation/5;

     gMC->Gsvolu("S01M", "TUBE", idAir, tpar, 3);
     gMC->Gsvolu("S02M", "TUBE", idAir, tpar, 3);

     // CHANGED
     //gMC->Gspos("S01M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
     //gMC->Gspos("S02M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
     
     GetEnvelopes(0)->AddEnvelope("S01M", 100, false);
     GetEnvelopes(1)->AddEnvelope("S02M", 200, false);
         

// // Aluminium frames
// // Outer frames
//      pgpar[0] = 360/12/2;
//      pgpar[1] = 360.;
//      pgpar[2] = 12.;
//      pgpar[3] =   2;
//      pgpar[4] = -dframez/2;
//      pgpar[5] = AliMUONConstants::Rmax(0);
//      pgpar[6] = pgpar[5]+dframep1;
//      pgpar[7] = +dframez/2;
//      pgpar[8] = pgpar[5];
//      pgpar[9] = pgpar[6];
//      gMC->Gsvolu("S01O", "PGON", idAlu1, pgpar, 10);
//      gMC->Gsvolu("S02O", "PGON", idAlu1, pgpar, 10);
//      gMC->Gspos("S01O",1,"S01M", 0.,0.,-zfpos,  0,"ONLY");
//      gMC->Gspos("S01O",2,"S01M", 0.,0.,+zfpos,  0,"ONLY");
//      gMC->Gspos("S02O",1,"S02M", 0.,0.,-zfpos,  0,"ONLY");
//      gMC->Gspos("S02O",2,"S02M", 0.,0.,+zfpos,  0,"ONLY");
// //
// // Inner frame
//      tpar[0]= AliMUONConstants::Rmin(0)-dframep1;
//      tpar[1]= AliMUONConstants::Rmin(0);
//      tpar[2]= dframez/2;
//      gMC->Gsvolu("S01I", "TUBE", idAlu1, tpar, 3);
//      gMC->Gsvolu("S02I", "TUBE", idAlu1, tpar, 3);

//      gMC->Gspos("S01I",1,"S01M", 0.,0.,-zfpos,  0,"ONLY");
//      gMC->Gspos("S01I",2,"S01M", 0.,0.,+zfpos,  0,"ONLY");
//      gMC->Gspos("S02I",1,"S02M", 0.,0.,-zfpos,  0,"ONLY");
//      gMC->Gspos("S02I",2,"S02M", 0.,0.,+zfpos,  0,"ONLY");
//
// Frame Crosses
     if (frameCrosses) {
         // outside gas
         // security for inside mother volume
         Float_t bpar[3];
	 bpar[0] = (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0))
	   * TMath::Cos(TMath::ASin(dframep1 /
		   (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0))))
	   / 2.0;
	 bpar[1] = dframep1/2;
	 // total thickness will be (4 * bpar[2]) for each chamber,
	 // which has to be equal to (2 * dframez) - DAlu
	 bpar[2] = (2.0 * dframez - kDAlu) / 4.0;
	 gMC->Gsvolu("S01B", "BOX", idAlu1, bpar, 3);
	 gMC->Gsvolu("S02B", "BOX", idAlu1, bpar, 3);
	 
	 gMC->Gspos("S01B",1,"S01M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,-zfpos, 
		    irot1,"ONLY");
	 gMC->Gspos("S01B",2,"S01M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,-zfpos, 
		    irot1,"ONLY");
	 gMC->Gspos("S01B",3,"S01M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,-zfpos, 
		    irot2,"ONLY");
	 gMC->Gspos("S01B",4,"S01M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,-zfpos, 
		    irot2,"ONLY");
	 gMC->Gspos("S01B",5,"S01M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,+zfpos, 
		    irot1,"ONLY");
	 gMC->Gspos("S01B",6,"S01M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,+zfpos, 
		    irot1,"ONLY");
	 gMC->Gspos("S01B",7,"S01M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,+zfpos, 
		    irot2,"ONLY");
	 gMC->Gspos("S01B",8,"S01M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,+zfpos, 
		    irot2,"ONLY");
	 
	 gMC->Gspos("S02B",1,"S02M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,-zfpos, 
		    irot1,"ONLY");
	 gMC->Gspos("S02B",2,"S02M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,-zfpos, 
		    irot1,"ONLY");
	 gMC->Gspos("S02B",3,"S02M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,-zfpos, 
		    irot2,"ONLY");
	 gMC->Gspos("S02B",4,"S02M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,-zfpos, 
		    irot2,"ONLY");
	 gMC->Gspos("S02B",5,"S02M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,+zfpos, 
		    irot1,"ONLY");
	 gMC->Gspos("S02B",6,"S02M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,+zfpos, 
		    irot1,"ONLY");
	 gMC->Gspos("S02B",7,"S02M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,+zfpos, 
		    irot2,"ONLY");
	 gMC->Gspos("S02B",8,"S02M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,+zfpos, 
		    irot2,"ONLY");
     }
//
//   Chamber Material represented by Alu sheet
     tpar[0]= AliMUONConstants::Rmin(0);
     tpar[1]= AliMUONConstants::Rmax(0);
     tpar[2] = (kDGas+kDAlu)/2;
     gMC->Gsvolu("S01A", "TUBE",  idAlu2, tpar, 3);
     gMC->Gsvolu("S02A", "TUBE",idAlu2, tpar, 3);
     gMC->Gspos("S01A", 1, "S01M", 0., 0., 0.,  0, "ONLY");
     gMC->Gspos("S02A", 1, "S02M", 0., 0., 0.,  0, "ONLY");
//     
//   Sensitive volumes
     // tpar[2] = kDGas;
     tpar[2] = kDGas/2;
     gMC->Gsvolu("S01G", "TUBE", idGas, tpar, 3);
     gMC->Gsvolu("S02G", "TUBE", idGas, tpar, 3);
     gMC->Gspos("S01G", 1, "S01A", 0., 0., 0.,  0, "ONLY");
     gMC->Gspos("S02G", 1, "S02A", 0., 0., 0.,  0, "ONLY");
//
// Frame Crosses to be placed inside gas
     // NONE: chambers are sensitive everywhere
//      if (frameCrosses) {

// 	 dr = (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0));
// 	 bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
// 	 bpar[1] = dframep1/2;
// 	 bpar[2] = kDGas/2;
// 	 gMC->Gsvolu("S01F", "BOX", idAlu1, bpar, 3);
// 	 gMC->Gsvolu("S02F", "BOX", idAlu1, bpar, 3);
	 
// 	 gMC->Gspos("S01F",1,"S01G", +AliMUONConstants::Rmin(0)+bpar[0] , 0, 0, 
// 		    irot1,"ONLY");
// 	 gMC->Gspos("S01F",2,"S01G", -AliMUONConstants::Rmin(0)-bpar[0] , 0, 0, 
// 		    irot1,"ONLY");
// 	 gMC->Gspos("S01F",3,"S01G", 0, +AliMUONConstants::Rmin(0)+bpar[0] , 0, 
// 		    irot2,"ONLY");
// 	 gMC->Gspos("S01F",4,"S01G", 0, -AliMUONConstants::Rmin(0)-bpar[0] , 0, 
// 		    irot2,"ONLY");
	 
// 	 gMC->Gspos("S02F",1,"S02G", +AliMUONConstants::Rmin(0)+bpar[0] , 0, 0, 
// 		    irot1,"ONLY");
// 	 gMC->Gspos("S02F",2,"S02G", -AliMUONConstants::Rmin(0)-bpar[0] , 0, 0, 
// 		    irot1,"ONLY");
// 	 gMC->Gspos("S02F",3,"S02G", 0, +AliMUONConstants::Rmin(0)+bpar[0] , 0, 
// 		    irot2,"ONLY");
// 	 gMC->Gspos("S02F",4,"S02G", 0, -AliMUONConstants::Rmin(0)-bpar[0] , 0, 
// 		    irot2,"ONLY");
//      }
}

//______________________________________________________________________________
void AliMUONSt1GeometryBuilder::SetVolumes() 
{
/// Define the volumes for the station2 chambers.
}

//______________________________________________________________________________
void AliMUONSt1GeometryBuilder::SetTransformations()
{
/// Define the transformations for the station2 chambers.

  Double_t zpos1= - AliMUONConstants::DefaultChamberZ(0); 
  SetTranslation(0, TGeoTranslation(0., 0., zpos1));

  Double_t zpos2 = - AliMUONConstants::DefaultChamberZ(1); 
  SetTranslation(0, TGeoTranslation(0., 0., zpos2));
}

//______________________________________________________________________________
void AliMUONSt1GeometryBuilder::SetSensitiveVolumes()
{
/// Define the sensitive volumes for station1 chambers.

  GetGeometry(0)->SetSensitiveVolume("S01G");
  GetGeometry(1)->SetSensitiveVolume("S02G");
}
Commit	Line	Data
	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	// $Id$
	17
	18	//-----------------------------------------------------------------------------
	19	// Class AliMUONSt1GeometryBuilder
	20	// -------------------------------
	21	// MUON Station1 coarse geometry construction class.
	22	// Extracted from AliMUONv1
	23	// by Ivana Hrivnacova, IPN Orsay
	24	// Included in AliRoot 2004/01/23
	25	//-----------------------------------------------------------------------------
	26
	27	#include <TVirtualMC.h>
	28	#include <TGeoMatrix.h>
	29
	30	#include "AliLog.h"
	31
	32	#include "AliMUONSt1GeometryBuilder.h"
	33	#include "AliMUON.h"
	34	#include "TArrayI.h"
	35	#include "AliMUONConstants.h"
	36	#include "AliMUONGeometryModule.h"
	37	#include "AliMUONGeometryEnvelopeStore.h"
	38
	39	/// \cond CLASSIMP
	40	ClassImp(AliMUONSt1GeometryBuilder)
	41	/// \endcond
	42
	43	//______________________________________________________________________________
	44	AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder(AliMUON* muon)
	45	: AliMUONVGeometryBuilder(0, 2),
	46	fMUON(muon)
	47	{
	48	/// Standard constructor
	49
	50	}
	51
	52	//______________________________________________________________________________
	53	AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder()
	54	: AliMUONVGeometryBuilder(),
	55	fMUON(0)
	56	{
	57	/// Default constructor
	58	}
	59
	60	//______________________________________________________________________________
	61	AliMUONSt1GeometryBuilder::~AliMUONSt1GeometryBuilder()
	62	{
	63	/// Destructor
	64	}
	65
	66	//
	67	// public methods
	68	//
	69
	70	//______________________________________________________________________________
	71	void AliMUONSt1GeometryBuilder::CreateGeometry()
	72	{
	73	/// From AliMUONv1::CreateGeometry()
	74
	75	//********************************************************************
	76	// Station 1 **
	77	//********************************************************************
	78	// CONCENTRIC
	79	// indices 1 and 2 for first and second chambers in the station
	80	// iChamber (first chamber) kept for other quanties than Z,
	81	// assumed to be the same in both chambers
	82
	83	// Get tracking medias Ids
	84	Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
	85	Int_t idAir= idtmed[1100]; // medium 1
	86	Int_t idAlu1=idtmed[1103]; // medium 4
	87	Int_t idAlu2=idtmed[1104]; // medium 5
	88	Int_t idGas=idtmed[1108]; // medium 9 = Ar-CO2 gas (80%+20%)
	89	Bool_t frameCrosses=kTRUE;
	90
	91	// Rotation matrices in the x-y plane
	92	// phi= 0 deg
	93	Int_t irot1;
	94	fMUON->AliMatrix(irot1, 90., 0., 90., 90., 0., 0.);
	95	// phi= 90 deg
	96	Int_t irot2;
	97	fMUON->AliMatrix(irot2, 90., 90., 90., 180., 0., 0.);
	98
	99	// DGas decreased from standard one (0.5)
	100	const Float_t kDGas = 0.4;
	101
	102	// DAlu increased from standard one (3% of X0),
	103	// because more electronics with smaller pads
	104	const Float_t kDAlu = 3.5 * 8.9 / 100.;
	105
	106	// Half of the total thickness of frame crosses (including DAlu)
	107	// for each chamber in stations 1 and 2:
	108	// 3% of X0 of composite material,
	109	// but taken as Aluminium here, with same thickness in number of X0
	110	Float_t dframez = 3. * 8.9 / 100;
	111	Float_t zfpos=-(kDGas+dframez+kDAlu)/2;
	112	// The same parameters are defined in builder for station 2
	113
	114	// Mother volume
	115	// Outer excess and inner recess for mother volume radius
	116	// with respect to ROuter and RInner
	117	Float_t dframep=.001; // Value for station 3 should be 6 ...
	118	// Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
	119	// Float_t dframep1=.001;
	120	Float_t dframep1 = 11.0;
	121	Float_t phi=2*TMath::Pi()/12/2;
	122	// The same parameters are defined in builder for station 2
	123
	124	Float_t tpar[3];
	125	Float_t dstation = (-AliMUONConstants::DefaultChamberZ(1)) -
	126	(-AliMUONConstants::DefaultChamberZ(0));
	127	tpar[0] = AliMUONConstants::Rmin(0)-dframep;
	128	tpar[1] = (AliMUONConstants::Rmax(0)+dframep)/TMath::Cos(phi);
	129	tpar[2] = dstation/5;
	130
	131	gMC->Gsvolu("S01M", "TUBE", idAir, tpar, 3);
	132	gMC->Gsvolu("S02M", "TUBE", idAir, tpar, 3);
	133
	134	// CHANGED
	135	//gMC->Gspos("S01M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
	136	//gMC->Gspos("S02M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
	137
	138	GetEnvelopes(0)->AddEnvelope("S01M", 100, false);
	139	GetEnvelopes(1)->AddEnvelope("S02M", 200, false);
	140
	141
	142	// // Aluminium frames
	143	// // Outer frames
	144	// pgpar[0] = 360/12/2;
	145	// pgpar[1] = 360.;
	146	// pgpar[2] = 12.;
	147	// pgpar[3] = 2;
	148	// pgpar[4] = -dframez/2;
	149	// pgpar[5] = AliMUONConstants::Rmax(0);
	150	// pgpar[6] = pgpar[5]+dframep1;
	151	// pgpar[7] = +dframez/2;
	152	// pgpar[8] = pgpar[5];
	153	// pgpar[9] = pgpar[6];
	154	// gMC->Gsvolu("S01O", "PGON", idAlu1, pgpar, 10);
	155	// gMC->Gsvolu("S02O", "PGON", idAlu1, pgpar, 10);
	156	// gMC->Gspos("S01O",1,"S01M", 0.,0.,-zfpos, 0,"ONLY");
	157	// gMC->Gspos("S01O",2,"S01M", 0.,0.,+zfpos, 0,"ONLY");
	158	// gMC->Gspos("S02O",1,"S02M", 0.,0.,-zfpos, 0,"ONLY");
	159	// gMC->Gspos("S02O",2,"S02M", 0.,0.,+zfpos, 0,"ONLY");
	160	// //
	161	// // Inner frame
	162	// tpar[0]= AliMUONConstants::Rmin(0)-dframep1;
	163	// tpar[1]= AliMUONConstants::Rmin(0);
	164	// tpar[2]= dframez/2;
	165	// gMC->Gsvolu("S01I", "TUBE", idAlu1, tpar, 3);
	166	// gMC->Gsvolu("S02I", "TUBE", idAlu1, tpar, 3);
	167
	168	// gMC->Gspos("S01I",1,"S01M", 0.,0.,-zfpos, 0,"ONLY");
	169	// gMC->Gspos("S01I",2,"S01M", 0.,0.,+zfpos, 0,"ONLY");
	170	// gMC->Gspos("S02I",1,"S02M", 0.,0.,-zfpos, 0,"ONLY");
	171	// gMC->Gspos("S02I",2,"S02M", 0.,0.,+zfpos, 0,"ONLY");
	172	//
	173	// Frame Crosses
	174	if (frameCrosses) {
	175	// outside gas
	176	// security for inside mother volume
	177	Float_t bpar[3];
	178	bpar[0] = (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0))
	179	* TMath::Cos(TMath::ASin(dframep1 /
	180	(AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0))))
	181	/ 2.0;
	182	bpar[1] = dframep1/2;
	183	// total thickness will be (4 * bpar[2]) for each chamber,
	184	// which has to be equal to (2 * dframez) - DAlu
	185	bpar[2] = (2.0 * dframez - kDAlu) / 4.0;
	186	gMC->Gsvolu("S01B", "BOX", idAlu1, bpar, 3);
	187	gMC->Gsvolu("S02B", "BOX", idAlu1, bpar, 3);
	188
	189	gMC->Gspos("S01B",1,"S01M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,-zfpos,
	190	irot1,"ONLY");
	191	gMC->Gspos("S01B",2,"S01M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,-zfpos,
	192	irot1,"ONLY");
	193	gMC->Gspos("S01B",3,"S01M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,-zfpos,
	194	irot2,"ONLY");
	195	gMC->Gspos("S01B",4,"S01M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,-zfpos,
	196	irot2,"ONLY");
	197	gMC->Gspos("S01B",5,"S01M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,+zfpos,
	198	irot1,"ONLY");
	199	gMC->Gspos("S01B",6,"S01M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,+zfpos,
	200	irot1,"ONLY");
	201	gMC->Gspos("S01B",7,"S01M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,+zfpos,
	202	irot2,"ONLY");
	203	gMC->Gspos("S01B",8,"S01M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,+zfpos,
	204	irot2,"ONLY");
	205
	206	gMC->Gspos("S02B",1,"S02M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,-zfpos,
	207	irot1,"ONLY");
	208	gMC->Gspos("S02B",2,"S02M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,-zfpos,
	209	irot1,"ONLY");
	210	gMC->Gspos("S02B",3,"S02M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,-zfpos,
	211	irot2,"ONLY");
	212	gMC->Gspos("S02B",4,"S02M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,-zfpos,
	213	irot2,"ONLY");
	214	gMC->Gspos("S02B",5,"S02M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,+zfpos,
	215	irot1,"ONLY");
	216	gMC->Gspos("S02B",6,"S02M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,+zfpos,
	217	irot1,"ONLY");
	218	gMC->Gspos("S02B",7,"S02M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,+zfpos,
	219	irot2,"ONLY");
	220	gMC->Gspos("S02B",8,"S02M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,+zfpos,
	221	irot2,"ONLY");
	222	}
	223	//
	224	// Chamber Material represented by Alu sheet
	225	tpar[0]= AliMUONConstants::Rmin(0);
	226	tpar[1]= AliMUONConstants::Rmax(0);
	227	tpar[2] = (kDGas+kDAlu)/2;
	228	gMC->Gsvolu("S01A", "TUBE", idAlu2, tpar, 3);
	229	gMC->Gsvolu("S02A", "TUBE",idAlu2, tpar, 3);
	230	gMC->Gspos("S01A", 1, "S01M", 0., 0., 0., 0, "ONLY");
	231	gMC->Gspos("S02A", 1, "S02M", 0., 0., 0., 0, "ONLY");
	232	//
	233	// Sensitive volumes
	234	// tpar[2] = kDGas;
	235	tpar[2] = kDGas/2;
	236	gMC->Gsvolu("S01G", "TUBE", idGas, tpar, 3);
	237	gMC->Gsvolu("S02G", "TUBE", idGas, tpar, 3);
	238	gMC->Gspos("S01G", 1, "S01A", 0., 0., 0., 0, "ONLY");
	239	gMC->Gspos("S02G", 1, "S02A", 0., 0., 0., 0, "ONLY");
	240	//
	241	// Frame Crosses to be placed inside gas
	242	// NONE: chambers are sensitive everywhere
	243	// if (frameCrosses) {
	244
	245	// dr = (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0));
	246	// bpar[0] = TMath::Sqrt(drdr-dframep1dframep1/4)/2;
	247	// bpar[1] = dframep1/2;
	248	// bpar[2] = kDGas/2;
	249	// gMC->Gsvolu("S01F", "BOX", idAlu1, bpar, 3);
	250	// gMC->Gsvolu("S02F", "BOX", idAlu1, bpar, 3);
	251
	252	// gMC->Gspos("S01F",1,"S01G", +AliMUONConstants::Rmin(0)+bpar[0] , 0, 0,
	253	// irot1,"ONLY");
	254	// gMC->Gspos("S01F",2,"S01G", -AliMUONConstants::Rmin(0)-bpar[0] , 0, 0,
	255	// irot1,"ONLY");
	256	// gMC->Gspos("S01F",3,"S01G", 0, +AliMUONConstants::Rmin(0)+bpar[0] , 0,
	257	// irot2,"ONLY");
	258	// gMC->Gspos("S01F",4,"S01G", 0, -AliMUONConstants::Rmin(0)-bpar[0] , 0,
	259	// irot2,"ONLY");
	260
	261	// gMC->Gspos("S02F",1,"S02G", +AliMUONConstants::Rmin(0)+bpar[0] , 0, 0,
	262	// irot1,"ONLY");
	263	// gMC->Gspos("S02F",2,"S02G", -AliMUONConstants::Rmin(0)-bpar[0] , 0, 0,
	264	// irot1,"ONLY");
	265	// gMC->Gspos("S02F",3,"S02G", 0, +AliMUONConstants::Rmin(0)+bpar[0] , 0,
	266	// irot2,"ONLY");
	267	// gMC->Gspos("S02F",4,"S02G", 0, -AliMUONConstants::Rmin(0)-bpar[0] , 0,
	268	// irot2,"ONLY");
	269	// }
	270	}
	271
	272	//______________________________________________________________________________
	273	void AliMUONSt1GeometryBuilder::SetVolumes()
	274	{
	275	/// Define the volumes for the station2 chambers.
	276	}
	277
	278	//______________________________________________________________________________
	279	void AliMUONSt1GeometryBuilder::SetTransformations()
	280	{
	281	/// Define the transformations for the station2 chambers.
	282
	283	Double_t zpos1= - AliMUONConstants::DefaultChamberZ(0);
	284	SetTranslation(0, TGeoTranslation(0., 0., zpos1));
	285
	286	Double_t zpos2 = - AliMUONConstants::DefaultChamberZ(1);
	287	SetTranslation(0, TGeoTranslation(0., 0., zpos2));
	288	}
	289
	290	//______________________________________________________________________________
	291	void AliMUONSt1GeometryBuilder::SetSensitiveVolumes()
	292	{
	293	/// Define the sensitive volumes for station1 chambers.
	294
	295	GetGeometry(0)->SetSensitiveVolume("S01G");
	296	GetGeometry(1)->SetSensitiveVolume("S02G");
	297	}