[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"

using std::endl;
using std::cout;
/// \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	using std::endl;
	40	using std::cout;
	41	/// \cond CLASSIMP
	42	ClassImp(AliMUONSt1GeometryBuilder)
	43	/// \endcond
	44
	45	//______________________________________________________________________________
	46	AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder(AliMUON* muon)
	47	: AliMUONVGeometryBuilder(0, 2),
	48	fMUON(muon)
	49	{
	50	/// Standard constructor
	51
	52	}
	53
	54	//______________________________________________________________________________
	55	AliMUONSt1GeometryBuilder::AliMUONSt1GeometryBuilder()
	56	: AliMUONVGeometryBuilder(),
	57	fMUON(0)
	58	{
	59	/// Default constructor
	60	}
	61
	62	//______________________________________________________________________________
	63	AliMUONSt1GeometryBuilder::~AliMUONSt1GeometryBuilder()
	64	{
	65	/// Destructor
	66	}
	67
	68	//
	69	// public methods
	70	//
	71
	72	//______________________________________________________________________________
	73	void AliMUONSt1GeometryBuilder::CreateGeometry()
	74	{
	75	/// From AliMUONv1::CreateGeometry()
	76
	77	//********************************************************************
	78	// Station 1 **
	79	//********************************************************************
	80	// CONCENTRIC
	81	// indices 1 and 2 for first and second chambers in the station
	82	// iChamber (first chamber) kept for other quanties than Z,
	83	// assumed to be the same in both chambers
	84
	85	// Get tracking medias Ids
	86	Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
	87	Int_t idAir= idtmed[1100]; // medium 1
	88	Int_t idAlu1=idtmed[1103]; // medium 4
	89	Int_t idAlu2=idtmed[1104]; // medium 5
	90	Int_t idGas=idtmed[1108]; // medium 9 = Ar-CO2 gas (80%+20%)
	91	Bool_t frameCrosses=kTRUE;
	92
	93	// Rotation matrices in the x-y plane
	94	// phi= 0 deg
	95	Int_t irot1;
	96	fMUON->AliMatrix(irot1, 90., 0., 90., 90., 0., 0.);
	97	// phi= 90 deg
	98	Int_t irot2;
	99	fMUON->AliMatrix(irot2, 90., 90., 90., 180., 0., 0.);
	100
	101	// DGas decreased from standard one (0.5)
	102	const Float_t kDGas = 0.4;
	103
	104	// DAlu increased from standard one (3% of X0),
	105	// because more electronics with smaller pads
	106	const Float_t kDAlu = 3.5 * 8.9 / 100.;
	107
	108	// Half of the total thickness of frame crosses (including DAlu)
	109	// for each chamber in stations 1 and 2:
	110	// 3% of X0 of composite material,
	111	// but taken as Aluminium here, with same thickness in number of X0
	112	Float_t dframez = 3. * 8.9 / 100;
	113	Float_t zfpos=-(kDGas+dframez+kDAlu)/2;
	114	// The same parameters are defined in builder for station 2
	115
	116	// Mother volume
	117	// Outer excess and inner recess for mother volume radius
	118	// with respect to ROuter and RInner
	119	Float_t dframep=.001; // Value for station 3 should be 6 ...
	120	// Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
	121	// Float_t dframep1=.001;
	122	Float_t dframep1 = 11.0;
	123	Float_t phi=2*TMath::Pi()/12/2;
	124	// The same parameters are defined in builder for station 2
	125
	126	Float_t tpar[3];
	127	Float_t dstation = (-AliMUONConstants::DefaultChamberZ(1)) -
	128	(-AliMUONConstants::DefaultChamberZ(0));
	129	tpar[0] = AliMUONConstants::Rmin(0)-dframep;
	130	tpar[1] = (AliMUONConstants::Rmax(0)+dframep)/TMath::Cos(phi);
	131	tpar[2] = dstation/5;
	132
	133	gMC->Gsvolu("S01M", "TUBE", idAir, tpar, 3);
	134	gMC->Gsvolu("S02M", "TUBE", idAir, tpar, 3);
	135
	136	// CHANGED
	137	//gMC->Gspos("S01M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
	138	//gMC->Gspos("S02M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
	139
	140	GetEnvelopes(0)->AddEnvelope("S01M", 100, false);
	141	GetEnvelopes(1)->AddEnvelope("S02M", 200, false);
	142
	143
	144	// // Aluminium frames
	145	// // Outer frames
	146	// pgpar[0] = 360/12/2;
	147	// pgpar[1] = 360.;
	148	// pgpar[2] = 12.;
	149	// pgpar[3] = 2;
	150	// pgpar[4] = -dframez/2;
	151	// pgpar[5] = AliMUONConstants::Rmax(0);
	152	// pgpar[6] = pgpar[5]+dframep1;
	153	// pgpar[7] = +dframez/2;
	154	// pgpar[8] = pgpar[5];
	155	// pgpar[9] = pgpar[6];
	156	// gMC->Gsvolu("S01O", "PGON", idAlu1, pgpar, 10);
	157	// gMC->Gsvolu("S02O", "PGON", idAlu1, pgpar, 10);
	158	// gMC->Gspos("S01O",1,"S01M", 0.,0.,-zfpos, 0,"ONLY");
	159	// gMC->Gspos("S01O",2,"S01M", 0.,0.,+zfpos, 0,"ONLY");
	160	// gMC->Gspos("S02O",1,"S02M", 0.,0.,-zfpos, 0,"ONLY");
	161	// gMC->Gspos("S02O",2,"S02M", 0.,0.,+zfpos, 0,"ONLY");
	162	// //
	163	// // Inner frame
	164	// tpar[0]= AliMUONConstants::Rmin(0)-dframep1;
	165	// tpar[1]= AliMUONConstants::Rmin(0);
	166	// tpar[2]= dframez/2;
	167	// gMC->Gsvolu("S01I", "TUBE", idAlu1, tpar, 3);
	168	// gMC->Gsvolu("S02I", "TUBE", idAlu1, tpar, 3);
	169
	170	// gMC->Gspos("S01I",1,"S01M", 0.,0.,-zfpos, 0,"ONLY");
	171	// gMC->Gspos("S01I",2,"S01M", 0.,0.,+zfpos, 0,"ONLY");
	172	// gMC->Gspos("S02I",1,"S02M", 0.,0.,-zfpos, 0,"ONLY");
	173	// gMC->Gspos("S02I",2,"S02M", 0.,0.,+zfpos, 0,"ONLY");
	174	//
	175	// Frame Crosses
	176	if (frameCrosses) {
	177	// outside gas
	178	// security for inside mother volume
	179	Float_t bpar[3];
	180	bpar[0] = (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0))
	181	* TMath::Cos(TMath::ASin(dframep1 /
	182	(AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0))))
	183	/ 2.0;
	184	bpar[1] = dframep1/2;
	185	// total thickness will be (4 * bpar[2]) for each chamber,
	186	// which has to be equal to (2 * dframez) - DAlu
	187	bpar[2] = (2.0 * dframez - kDAlu) / 4.0;
	188	gMC->Gsvolu("S01B", "BOX", idAlu1, bpar, 3);
	189	gMC->Gsvolu("S02B", "BOX", idAlu1, bpar, 3);
	190
	191	gMC->Gspos("S01B",1,"S01M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,-zfpos,
	192	irot1,"ONLY");
	193	gMC->Gspos("S01B",2,"S01M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,-zfpos,
	194	irot1,"ONLY");
	195	gMC->Gspos("S01B",3,"S01M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,-zfpos,
	196	irot2,"ONLY");
	197	gMC->Gspos("S01B",4,"S01M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,-zfpos,
	198	irot2,"ONLY");
	199	gMC->Gspos("S01B",5,"S01M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,+zfpos,
	200	irot1,"ONLY");
	201	gMC->Gspos("S01B",6,"S01M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,+zfpos,
	202	irot1,"ONLY");
	203	gMC->Gspos("S01B",7,"S01M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,+zfpos,
	204	irot2,"ONLY");
	205	gMC->Gspos("S01B",8,"S01M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,+zfpos,
	206	irot2,"ONLY");
	207
	208	gMC->Gspos("S02B",1,"S02M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,-zfpos,
	209	irot1,"ONLY");
	210	gMC->Gspos("S02B",2,"S02M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,-zfpos,
	211	irot1,"ONLY");
	212	gMC->Gspos("S02B",3,"S02M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,-zfpos,
	213	irot2,"ONLY");
	214	gMC->Gspos("S02B",4,"S02M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,-zfpos,
	215	irot2,"ONLY");
	216	gMC->Gspos("S02B",5,"S02M", +AliMUONConstants::Rmin(0)+bpar[0] , 0,+zfpos,
	217	irot1,"ONLY");
	218	gMC->Gspos("S02B",6,"S02M", -AliMUONConstants::Rmin(0)-bpar[0] , 0,+zfpos,
	219	irot1,"ONLY");
	220	gMC->Gspos("S02B",7,"S02M", 0, +AliMUONConstants::Rmin(0)+bpar[0] ,+zfpos,
	221	irot2,"ONLY");
	222	gMC->Gspos("S02B",8,"S02M", 0, -AliMUONConstants::Rmin(0)-bpar[0] ,+zfpos,
	223	irot2,"ONLY");
	224	}
	225	//
	226	// Chamber Material represented by Alu sheet
	227	tpar[0]= AliMUONConstants::Rmin(0);
	228	tpar[1]= AliMUONConstants::Rmax(0);
	229	tpar[2] = (kDGas+kDAlu)/2;
	230	gMC->Gsvolu("S01A", "TUBE", idAlu2, tpar, 3);
	231	gMC->Gsvolu("S02A", "TUBE",idAlu2, tpar, 3);
	232	gMC->Gspos("S01A", 1, "S01M", 0., 0., 0., 0, "ONLY");
	233	gMC->Gspos("S02A", 1, "S02M", 0., 0., 0., 0, "ONLY");
	234	//
	235	// Sensitive volumes
	236	// tpar[2] = kDGas;
	237	tpar[2] = kDGas/2;
	238	gMC->Gsvolu("S01G", "TUBE", idGas, tpar, 3);
	239	gMC->Gsvolu("S02G", "TUBE", idGas, tpar, 3);
	240	gMC->Gspos("S01G", 1, "S01A", 0., 0., 0., 0, "ONLY");
	241	gMC->Gspos("S02G", 1, "S02A", 0., 0., 0., 0, "ONLY");
	242	//
	243	// Frame Crosses to be placed inside gas
	244	// NONE: chambers are sensitive everywhere
	245	// if (frameCrosses) {
	246
	247	// dr = (AliMUONConstants::Rmax(0) - AliMUONConstants::Rmin(0));
	248	// bpar[0] = TMath::Sqrt(drdr-dframep1dframep1/4)/2;
	249	// bpar[1] = dframep1/2;
	250	// bpar[2] = kDGas/2;
	251	// gMC->Gsvolu("S01F", "BOX", idAlu1, bpar, 3);
	252	// gMC->Gsvolu("S02F", "BOX", idAlu1, bpar, 3);
	253
	254	// gMC->Gspos("S01F",1,"S01G", +AliMUONConstants::Rmin(0)+bpar[0] , 0, 0,
	255	// irot1,"ONLY");
	256	// gMC->Gspos("S01F",2,"S01G", -AliMUONConstants::Rmin(0)-bpar[0] , 0, 0,
	257	// irot1,"ONLY");
	258	// gMC->Gspos("S01F",3,"S01G", 0, +AliMUONConstants::Rmin(0)+bpar[0] , 0,
	259	// irot2,"ONLY");
	260	// gMC->Gspos("S01F",4,"S01G", 0, -AliMUONConstants::Rmin(0)-bpar[0] , 0,
	261	// irot2,"ONLY");
	262
	263	// gMC->Gspos("S02F",1,"S02G", +AliMUONConstants::Rmin(0)+bpar[0] , 0, 0,
	264	// irot1,"ONLY");
	265	// gMC->Gspos("S02F",2,"S02G", -AliMUONConstants::Rmin(0)-bpar[0] , 0, 0,
	266	// irot1,"ONLY");
	267	// gMC->Gspos("S02F",3,"S02G", 0, +AliMUONConstants::Rmin(0)+bpar[0] , 0,
	268	// irot2,"ONLY");
	269	// gMC->Gspos("S02F",4,"S02G", 0, -AliMUONConstants::Rmin(0)-bpar[0] , 0,
	270	// irot2,"ONLY");
	271	// }
	272	}
	273
	274	//______________________________________________________________________________
	275	void AliMUONSt1GeometryBuilder::SetVolumes()
	276	{
	277	/// Define the volumes for the station2 chambers.
	278	}
	279
	280	//______________________________________________________________________________
	281	void AliMUONSt1GeometryBuilder::SetTransformations()
	282	{
	283	/// Define the transformations for the station2 chambers.
	284
	285	Double_t zpos1= - AliMUONConstants::DefaultChamberZ(0);
	286	SetTranslation(0, TGeoTranslation(0., 0., zpos1));
	287
	288	Double_t zpos2 = - AliMUONConstants::DefaultChamberZ(1);
	289	SetTranslation(0, TGeoTranslation(0., 0., zpos2));
	290	}
	291
	292	//______________________________________________________________________________
	293	void AliMUONSt1GeometryBuilder::SetSensitiveVolumes()
	294	{
	295	/// Define the sensitive volumes for station1 chambers.
	296
	297	GetGeometry(0)->SetSensitiveVolume("S01G");
	298	GetGeometry(1)->SetSensitiveVolume("S02G");
	299	}