MUON/AliMUONSt2GeometryBuilder.cxx

   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 AliMUONSt2GeometryBuilder
  19 // -------------------------------
  20 // MUON Station2 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 "AliMUONSt2GeometryBuilder.h"
  29 #include "AliMUON.h"
  30 #include "AliMUONChamber.h"
  31 #include "AliMUONChamberGeometry.h"
  32 #include "AliMUONGeometryEnvelopeStore.h"
  33 #include "AliLog.h"
  34
  35 ClassImp(AliMUONSt2GeometryBuilder)
  36
  37 //______________________________________________________________________________
  38 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder(AliMUON* muon)
  39  : AliMUONVGeometryBuilder("st2.dat",
  40                            &muon->Chamber(2), &muon->Chamber(3)),
  41    fMUON(muon)
  42 {
  43 // Standard constructor
  44
  45 }
  46
  47 //______________________________________________________________________________
  48 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder()
  49  : AliMUONVGeometryBuilder(),
  50    fMUON(0)
  51 {
  52 // Default constructor
  53 }
  54
  55
  56 //______________________________________________________________________________
  57 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder(const AliMUONSt2GeometryBuilder& rhs)
  58   : AliMUONVGeometryBuilder(rhs)
  59 {
  60 // Protected copy constructor
  61
  62   AliFatal("Copy constructor is not implemented.");
  63 }
  64
  65 //______________________________________________________________________________
  66 AliMUONSt2GeometryBuilder::~AliMUONSt2GeometryBuilder() {
  67 //
  68 }
  69
  70 //______________________________________________________________________________
  71 AliMUONSt2GeometryBuilder&
  72 AliMUONSt2GeometryBuilder::operator = (const AliMUONSt2GeometryBuilder& rhs)
  73 {
  74 // Protected assignement operator
  75
  76   // check assignement to self
  77   if (this == &rhs) return *this;
  78
  79   AliFatal("Assignment operator is not implemented.");
  80
  81   return *this;
  82 }
  83
  84 //
  85 // public methods
  86 //
  87
  88 //______________________________________________________________________________
  89 void AliMUONSt2GeometryBuilder::CreateGeometry()
  90 {
  91 // From AliMUONv1::CreateGeometry()
  92
  93 //
  94 //********************************************************************
  95 //                            Station 2                             **
  96 //********************************************************************
  97      // indices 1 and 2 for first and second chambers in the station
  98      // iChamber (first chamber) kept for other quanties than Z,
  99      // assumed to be the same in both chambers
 100
 101      // Get tracking medias Ids
 102      Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
 103      Int_t idAir= idtmed[1100]; // medium 1
 104      Int_t idAlu1=idtmed[1103]; // medium 4
 105      Int_t idAlu2=idtmed[1104]; // medium 5
 106      Int_t idGas=idtmed[1108];  // medium 9 = Ar-CO2 gas (80%+20%)
 107      Bool_t frameCrosses=kTRUE;
 108
 109      // Rotation matrices in the x-y plane
 110      // phi= 0 deg
 111      Int_t irot1;
 112      fMUON->AliMatrix(irot1,  90.,   0., 90.,  90., 0., 0.);
 113      // phi= 90 deg
 114      Int_t irot2;
 115      fMUON->AliMatrix(irot2,  90.,  90., 90., 180., 0., 0.);
 116
 117      AliMUONChamber* iChamber = GetChamber(2);
 118      AliMUONChamber* iChamber1 = iChamber;
 119      AliMUONChamber* iChamber2 = GetChamber(3);
 120
 121      // Half of the total thickness of frame crosses (including DAlu)
 122      // for each chamber in stations 1 and 2:
 123      // 3% of X0 of composite material,
 124      // but taken as Aluminium here, with same thickness in number of X0
 125      Float_t dframez = 3. * 8.9 / 100;
 126      // DGas and DAlu not changed from standard values
 127      Double_t zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
 128              // The same parameters are defined in builder for station 1
 129
 130      // Mother volume
 131      // Outer excess and inner recess for mother volume radius
 132      // with respect to ROuter and RInner
 133      Float_t dframep=.001; // Value for station 3 should be 6 ...
 134      // Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
 135      // Float_t dframep1=.001;
 136      Float_t phi=2*TMath::Pi()/12/2;
 137              // The same parameters are defined in builder for station 1
 138
 139      Float_t tpar[3];
 140      Double_t dstation = (-iChamber2->Z()) - (-iChamber1->Z());
 141      tpar[0] = iChamber->RInner()-dframep;
 142      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 143      tpar[2] = dstation/5;
 144
 145      gMC->Gsvolu("S03M", "TUBE", idAir, tpar, 3);
 146      gMC->Gsvolu("S04M", "TUBE", idAir, tpar, 3);
 147
 148      // CHANGED
 149      //gMC->Gspos("S03M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 150      //gMC->Gspos("S04M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 151
 152      GetEnvelopes(2)->AddEnvelope("S03M", 300, false);
 153      GetEnvelopes(3)->AddEnvelope("S04M", 400, false);
 154
 155      gMC->Gsbool("S03M", "L3DO");
 156      gMC->Gsbool("S03M", "L3O1");
 157      gMC->Gsbool("S03M", "L3O2");
 158      gMC->Gsbool("S04M", "L3DO");
 159      gMC->Gsbool("S04M", "L3O1");
 160      gMC->Gsbool("S04M", "L3O2");
 161
 162 // // Aluminium frames
 163 // // Outer frames
 164 //      pgpar[0] = 360/12/2;
 165 //      pgpar[1] = 360.;
 166 //      pgpar[2] = 12.;
 167 //      pgpar[3] =   2;
 168 //      pgpar[4] = -dframez/2;
 169 //      pgpar[5] = iChamber->ROuter();
 170 //      pgpar[6] = pgpar[5]+dframep;
 171 //      pgpar[7] = +dframez/2;
 172 //      pgpar[8] = pgpar[5];
 173 //      pgpar[9] = pgpar[6];
 174 //      gMC->Gsvolu("S03O", "PGON", idAlu1, pgpar, 10);
 175 //      gMC->Gsvolu("S04O", "PGON", idAlu1, pgpar, 10);
 176 //      gMC->Gspos("S03O",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 177 //      gMC->Gspos("S03O",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 178 //      gMC->Gspos("S04O",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 179 //      gMC->Gspos("S04O",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 180 // //
 181 // // Inner frame
 182 //      tpar[0]= iChamber->RInner()-dframep;
 183 //      tpar[1]= iChamber->RInner();
 184 //      tpar[2]= dframez/2;
 185 //      gMC->Gsvolu("S03I", "TUBE", idAlu1, tpar, 3);
 186 //      gMC->Gsvolu("S04I", "TUBE", idAlu1, tpar, 3);
 187
 188 //      gMC->Gspos("S03I",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 189 //      gMC->Gspos("S03I",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 190 //      gMC->Gspos("S04I",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 191 //      gMC->Gspos("S04I",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 192 //
 193 // Frame Crosses
 194      if (frameCrosses) {
 195          // outside gas
 196          // security for inside mother volume
 197
 198          // ADDED !! Repeated
 199          Float_t dframep1 = 11.0;
 200          Float_t dframez = 3. * 8.9 / 100;
 201
 202          Float_t bpar[3];
 203          bpar[0] = (iChamber->ROuter() - iChamber->RInner())
 204            * TMath::Cos(TMath::ASin(dframep1 /
 205                                    (iChamber->ROuter() - iChamber->RInner())))
 206            / 2.0;
 207          bpar[1] = dframep1/2;
 208          // total thickness will be (4 * bpar[2]) for each chamber,
 209          // which has to be equal to (2 * dframez) - DAlu
 210          bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
 211          gMC->Gsvolu("S03B", "BOX", idAlu1, bpar, 3);
 212          gMC->Gsvolu("S04B", "BOX", idAlu1, bpar, 3);
 213
 214          gMC->Gspos("S03B",1,"S03M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 215                     irot1,"ONLY");
 216          gMC->Gspos("S03B",2,"S03M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 217                     irot1,"ONLY");
 218          gMC->Gspos("S03B",3,"S03M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 219                     irot2,"ONLY");
 220          gMC->Gspos("S03B",4,"S03M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 221                     irot2,"ONLY");
 222          gMC->Gspos("S03B",5,"S03M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
 223                     irot1,"ONLY");
 224          gMC->Gspos("S03B",6,"S03M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
 225                     irot1,"ONLY");
 226          gMC->Gspos("S03B",7,"S03M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
 227                     irot2,"ONLY");
 228          gMC->Gspos("S03B",8,"S03M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
 229                     irot2,"ONLY");
 230
 231          gMC->Gspos("S04B",1,"S04M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 232                     irot1,"ONLY");
 233          gMC->Gspos("S04B",2,"S04M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 234                     irot1,"ONLY");
 235          gMC->Gspos("S04B",3,"S04M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 236                     irot2,"ONLY");
 237          gMC->Gspos("S04B",4,"S04M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 238                     irot2,"ONLY");
 239          gMC->Gspos("S04B",5,"S04M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
 240                     irot1,"ONLY");
 241          gMC->Gspos("S04B",6,"S04M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
 242                     irot1,"ONLY");
 243          gMC->Gspos("S04B",7,"S04M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
 244                     irot2,"ONLY");
 245          gMC->Gspos("S04B",8,"S04M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
 246                     irot2,"ONLY");
 247      }
 248 //
 249 //   Chamber Material represented by Alu sheet
 250      tpar[0]= iChamber->RInner();
 251      tpar[1]= iChamber->ROuter();
 252      tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
 253      gMC->Gsvolu("S03A", "TUBE", idAlu2, tpar, 3);
 254      gMC->Gsvolu("S04A", "TUBE", idAlu2, tpar, 3);
 255      gMC->Gspos("S03A", 1, "S03M", 0., 0., 0.,  0, "ONLY");
 256      gMC->Gspos("S04A", 1, "S04M", 0., 0., 0.,  0, "ONLY");
 257 //
 258 //   Sensitive volumes
 259      // tpar[2] = iChamber->DGas();
 260      tpar[2] = iChamber->DGas()/2;
 261      gMC->Gsvolu("S03G", "TUBE", idGas, tpar, 3);
 262      gMC->Gsvolu("S04G", "TUBE", idGas, tpar, 3);
 263      gMC->Gspos("S03G", 1, "S03A", 0., 0., 0.,  0, "ONLY");
 264      gMC->Gspos("S04G", 1, "S04A", 0., 0., 0.,  0, "ONLY");
 265 //
 266 // Frame Crosses to be placed inside gas
 267      // NONE: chambers are sensitive everywhere
 268 //      if (frameCrosses) {
 269
 270 //       dr = (iChamber->ROuter() - iChamber->RInner());
 271 //       bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
 272 //       bpar[1] = dframep1/2;
 273 //       bpar[2] = iChamber->DGas()/2;
 274 //       gMC->Gsvolu("S03F", "BOX", idAlu1, bpar, 3);
 275 //       gMC->Gsvolu("S04F", "BOX", idAlu1, bpar, 3);
 276
 277 //       gMC->Gspos("S03F",1,"S03G", +iChamber->RInner()+bpar[0] , 0, 0,
 278 //                  irot1,"ONLY");
 279 //       gMC->Gspos("S03F",2,"S03G", -iChamber->RInner()-bpar[0] , 0, 0,
 280 //                  irot1,"ONLY");
 281 //       gMC->Gspos("S03F",3,"S03G", 0, +iChamber->RInner()+bpar[0] , 0,
 282 //                  irot2,"ONLY");
 283 //       gMC->Gspos("S03F",4,"S03G", 0, -iChamber->RInner()-bpar[0] , 0,
 284 //                  irot2,"ONLY");
 285
 286 //       gMC->Gspos("S04F",1,"S04G", +iChamber->RInner()+bpar[0] , 0, 0,
 287 //                  irot1,"ONLY");
 288 //       gMC->Gspos("S04F",2,"S04G", -iChamber->RInner()-bpar[0] , 0, 0,
 289 //                  irot1,"ONLY");
 290 //       gMC->Gspos("S04F",3,"S04G", 0, +iChamber->RInner()+bpar[0] , 0,
 291 //                  irot2,"ONLY");
 292 //       gMC->Gspos("S04F",4,"S04G", 0, -iChamber->RInner()-bpar[0] , 0,
 293 //                  irot2,"ONLY");
 294 //      }
 295 /*
 296      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[2];
 297      iChamber2 =(AliMUONChamber*) (*fChambers)[3];
 298      zpos1=iChamber1->Z();
 299      zpos2=iChamber2->Z();
 300      dstation = zpos2 - zpos1;
 301      // DGas and DAlu not changed from standard values
 302      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
 303
 304 //
 305 //   Mother volume
 306      tpar[0] = iChamber->RInner()-dframep;
 307      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 308      tpar[2] = dstation/5;
 309
 310      gMC->Gsvolu("S03M", "TUBE", idAir, tpar, 3);
 311      gMC->Gsvolu("S04M", "TUBE", idAir, tpar, 3);
 312      gMC->Gspos("S03M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 313      gMC->Gspos("S04M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 314      gMC->Gsbool("S03M", "L3DO");
 315      gMC->Gsbool("S03M", "L3O1");
 316      gMC->Gsbool("S03M", "L3O2");
 317      gMC->Gsbool("S04M", "L3DO");
 318      gMC->Gsbool("S04M", "L3O1");
 319      gMC->Gsbool("S04M", "L3O2");
 320
 321 // // Aluminium frames
 322 // // Outer frames
 323 //      pgpar[0] = 360/12/2;
 324 //      pgpar[1] = 360.;
 325 //      pgpar[2] = 12.;
 326 //      pgpar[3] =   2;
 327 //      pgpar[4] = -dframez/2;
 328 //      pgpar[5] = iChamber->ROuter();
 329 //      pgpar[6] = pgpar[5]+dframep;
 330 //      pgpar[7] = +dframez/2;
 331 //      pgpar[8] = pgpar[5];
 332 //      pgpar[9] = pgpar[6];
 333 //      gMC->Gsvolu("S03O", "PGON", idAlu1, pgpar, 10);
 334 //      gMC->Gsvolu("S04O", "PGON", idAlu1, pgpar, 10);
 335 //      gMC->Gspos("S03O",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 336 //      gMC->Gspos("S03O",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 337 //      gMC->Gspos("S04O",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 338 //      gMC->Gspos("S04O",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 339 // //
 340 // // Inner frame
 341 //      tpar[0]= iChamber->RInner()-dframep;
 342 //      tpar[1]= iChamber->RInner();
 343 //      tpar[2]= dframez/2;
 344 //      gMC->Gsvolu("S03I", "TUBE", idAlu1, tpar, 3);
 345 //      gMC->Gsvolu("S04I", "TUBE", idAlu1, tpar, 3);
 346
 347 //      gMC->Gspos("S03I",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 348 //      gMC->Gspos("S03I",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 349 //      gMC->Gspos("S04I",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 350 //      gMC->Gspos("S04I",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 351 //
 352 // Frame Crosses
 353      if (frameCrosses) {
 354          // outside gas
 355          // security for inside mother volume
 356          bpar[0] = (iChamber->ROuter() - iChamber->RInner())
 357            * TMath::Cos(TMath::ASin(dframep1 /
 358                                    (iChamber->ROuter() - iChamber->RInner())))
 359            / 2.0;
 360          bpar[1] = dframep1/2;
 361          // total thickness will be (4 * bpar[2]) for each chamber,
 362          // which has to be equal to (2 * dframez) - DAlu
 363          bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
 364          gMC->Gsvolu("S03B", "BOX", idAlu1, bpar, 3);
 365          gMC->Gsvolu("S04B", "BOX", idAlu1, bpar, 3);
 366
 367          gMC->Gspos("S03B",1,"S03M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 368                     irot1,"ONLY");
 369          gMC->Gspos("S03B",2,"S03M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 370                     irot1,"ONLY");
 371          gMC->Gspos("S03B",3,"S03M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 372                     irot2,"ONLY");
 373          gMC->Gspos("S03B",4,"S03M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 374                     irot2,"ONLY");
 375          gMC->Gspos("S03B",5,"S03M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
 376                     irot1,"ONLY");
 377          gMC->Gspos("S03B",6,"S03M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
 378                     irot1,"ONLY");
 379          gMC->Gspos("S03B",7,"S03M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
 380                     irot2,"ONLY");
 381          gMC->Gspos("S03B",8,"S03M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
 382                     irot2,"ONLY");
 383
 384          gMC->Gspos("S04B",1,"S04M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 385                     irot1,"ONLY");
 386          gMC->Gspos("S04B",2,"S04M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 387                     irot1,"ONLY");
 388          gMC->Gspos("S04B",3,"S04M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 389                     irot2,"ONLY");
 390          gMC->Gspos("S04B",4,"S04M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 391                     irot2,"ONLY");
 392          gMC->Gspos("S04B",5,"S04M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
 393                     irot1,"ONLY");
 394          gMC->Gspos("S04B",6,"S04M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
 395                     irot1,"ONLY");
 396          gMC->Gspos("S04B",7,"S04M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
 397                     irot2,"ONLY");
 398          gMC->Gspos("S04B",8,"S04M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
 399                     irot2,"ONLY");
 400      }
 401 //
 402 //   Chamber Material represented by Alu sheet
 403      tpar[0]= iChamber->RInner();
 404      tpar[1]= iChamber->ROuter();
 405      tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
 406      gMC->Gsvolu("S03A", "TUBE", idAlu2, tpar, 3);
 407      gMC->Gsvolu("S04A", "TUBE", idAlu2, tpar, 3);
 408      gMC->Gspos("S03A", 1, "S03M", 0., 0., 0.,  0, "ONLY");
 409      gMC->Gspos("S04A", 1, "S04M", 0., 0., 0.,  0, "ONLY");
 410 //
 411 //   Sensitive volumes
 412      // tpar[2] = iChamber->DGas();
 413      tpar[2] = iChamber->DGas()/2;
 414      gMC->Gsvolu("S03G", "TUBE", idGas, tpar, 3);
 415      gMC->Gsvolu("S04G", "TUBE", idGas, tpar, 3);
 416      gMC->Gspos("S03G", 1, "S03A", 0., 0., 0.,  0, "ONLY");
 417      gMC->Gspos("S04G", 1, "S04A", 0., 0., 0.,  0, "ONLY");
 418 //
 419 // Frame Crosses to be placed inside gas
 420      // NONE: chambers are sensitive everywhere
 421 //      if (frameCrosses) {
 422
 423 //       dr = (iChamber->ROuter() - iChamber->RInner());
 424 //       bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
 425 //       bpar[1] = dframep1/2;
 426 //       bpar[2] = iChamber->DGas()/2;
 427 //       gMC->Gsvolu("S03F", "BOX", idAlu1, bpar, 3);
 428 //       gMC->Gsvolu("S04F", "BOX", idAlu1, bpar, 3);
 429
 430 //       gMC->Gspos("S03F",1,"S03G", +iChamber->RInner()+bpar[0] , 0, 0,
 431 //                  irot1,"ONLY");
 432 //       gMC->Gspos("S03F",2,"S03G", -iChamber->RInner()-bpar[0] , 0, 0,
 433 //                  irot1,"ONLY");
 434 //       gMC->Gspos("S03F",3,"S03G", 0, +iChamber->RInner()+bpar[0] , 0,
 435 //                  irot2,"ONLY");
 436 //       gMC->Gspos("S03F",4,"S03G", 0, -iChamber->RInner()-bpar[0] , 0,
 437 //                  irot2,"ONLY");
 438
 439 //       gMC->Gspos("S04F",1,"S04G", +iChamber->RInner()+bpar[0] , 0, 0,
 440 //                  irot1,"ONLY");
 441 //       gMC->Gspos("S04F",2,"S04G", -iChamber->RInner()-bpar[0] , 0, 0,
 442 //                  irot1,"ONLY");
 443 //       gMC->Gspos("S04F",3,"S04G", 0, +iChamber->RInner()+bpar[0] , 0,
 444 //                  irot2,"ONLY");
 445 //       gMC->Gspos("S04F",4,"S04G", 0, -iChamber->RInner()-bpar[0] , 0,
 446 //                  irot2,"ONLY");
 447 //      }
 448      }
 449 */
 450 }
 451
 452 //______________________________________________________________________________
 453 void AliMUONSt2GeometryBuilder::SetTransformations()
 454 {
 455 // Defines the transformations for the station2 chambers.
 456 // ---
 457
 458   AliMUONChamber* iChamber1 = GetChamber(2);
 459   Double_t zpos1 = - iChamber1->Z();
 460   iChamber1->GetGeometry()
 461     ->SetTranslation(TGeoTranslation(0., 0., zpos1));
 462
 463   AliMUONChamber* iChamber2 = GetChamber(3);
 464   Double_t zpos2 = - iChamber2->Z();
 465   iChamber2->GetGeometry()
 466     ->SetTranslation(TGeoTranslation(0., 0., zpos2));
 467 }
 468
 469 //______________________________________________________________________________
 470 void AliMUONSt2GeometryBuilder::SetSensitiveVolumes()
 471 {
 472 // Defines the sensitive volumes for station2 chambers.
 473 // ---
 474
 475   GetChamber(2)->GetGeometry()->SetSensitiveVolume("S03G");
 476   GetChamber(3)->GetGeometry()->SetSensitiveVolume("S04G");
 477 }