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