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
  34 ClassImp(AliMUONSt2GeometryBuilder)
  35
  36 //______________________________________________________________________________
  37 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder(AliMUON* muon)
  38  : AliMUONVGeometryBuilder("st2.dat",
  39                            &muon->Chamber(2), &muon->Chamber(3)),
  40    fMUON(muon)
  41 {
  42 // Standard constructor
  43
  44 }
  45
  46 //______________________________________________________________________________
  47 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder()
  48  : AliMUONVGeometryBuilder(),
  49    fMUON(0)
  50 {
  51 // Default constructor
  52 }
  53
  54
  55 //______________________________________________________________________________
  56 AliMUONSt2GeometryBuilder::AliMUONSt2GeometryBuilder(const AliMUONSt2GeometryBuilder& rhs)
  57   : AliMUONVGeometryBuilder(rhs)
  58 {
  59 // Protected copy constructor
  60
  61   Fatal("Copy constructor",
  62         "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   Fatal("operator=",
  80         "Assignment operator is not implemented.");
  81
  82   return *this;
  83 }
  84
  85 //
  86 // public methods
  87 //
  88
  89 //______________________________________________________________________________
  90 void AliMUONSt2GeometryBuilder::CreateGeometry()
  91 {
  92 // From AliMUONv1::CreateGeometry()
  93
  94 //
  95 //********************************************************************
  96 //                            Station 2                             **
  97 //********************************************************************
  98      // indices 1 and 2 for first and second chambers in the station
  99      // iChamber (first chamber) kept for other quanties than Z,
 100      // assumed to be the same in both chambers
 101
 102      // Get tracking medias Ids
 103      Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
 104      Int_t idAir= idtmed[1100]; // medium 1
 105      Int_t idAlu1=idtmed[1103]; // medium 4
 106      Int_t idAlu2=idtmed[1104]; // medium 5
 107      Int_t idGas=idtmed[1108];  // medium 9 = Ar-CO2 gas (80%+20%)
 108      Bool_t frameCrosses=kTRUE;
 109
 110      // Rotation matrices in the x-y plane
 111      // phi= 0 deg
 112      Int_t irot1;
 113      fMUON->AliMatrix(irot1,  90.,   0., 90.,  90., 0., 0.);
 114      // phi= 90 deg
 115      Int_t irot2;
 116      fMUON->AliMatrix(irot2,  90.,  90., 90., 180., 0., 0.);
 117
 118      AliMUONChamber* iChamber = GetChamber(2);
 119      AliMUONChamber* iChamber1 = iChamber;
 120      AliMUONChamber* iChamber2 = GetChamber(3);
 121
 122      // Half of the total thickness of frame crosses (including DAlu)
 123      // for each chamber in stations 1 and 2:
 124      // 3% of X0 of composite material,
 125      // but taken as Aluminium here, with same thickness in number of X0
 126      Float_t dframez = 3. * 8.9 / 100;
 127      // DGas and DAlu not changed from standard values
 128      Double_t zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
 129              // The same parameters are defined in builder for station 1
 130
 131      // Mother volume
 132      // Outer excess and inner recess for mother volume radius
 133      // with respect to ROuter and RInner
 134      Float_t dframep=.001; // Value for station 3 should be 6 ...
 135      // Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
 136      // Float_t dframep1=.001;
 137      Float_t phi=2*TMath::Pi()/12/2;
 138              // The same parameters are defined in builder for station 1
 139
 140      Float_t tpar[3];
 141      Double_t dstation = (-iChamber2->Z()) - (-iChamber1->Z());
 142      tpar[0] = iChamber->RInner()-dframep;
 143      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 144      tpar[2] = dstation/5;
 145
 146      gMC->Gsvolu("S03M", "TUBE", idAir, tpar, 3);
 147      gMC->Gsvolu("S04M", "TUBE", idAir, tpar, 3);
 148
 149      // CHANGED
 150      //gMC->Gspos("S03M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 151      //gMC->Gspos("S04M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 152
 153      GetEnvelopes(2)->AddEnvelope("S03M", 300, false);
 154      GetEnvelopes(3)->AddEnvelope("S04M", 400, false);
 155
 156      gMC->Gsbool("S03M", "L3DO");
 157      gMC->Gsbool("S03M", "L3O1");
 158      gMC->Gsbool("S03M", "L3O2");
 159      gMC->Gsbool("S04M", "L3DO");
 160      gMC->Gsbool("S04M", "L3O1");
 161      gMC->Gsbool("S04M", "L3O2");
 162
 163 // // Aluminium frames
 164 // // Outer frames
 165 //      pgpar[0] = 360/12/2;
 166 //      pgpar[1] = 360.;
 167 //      pgpar[2] = 12.;
 168 //      pgpar[3] =   2;
 169 //      pgpar[4] = -dframez/2;
 170 //      pgpar[5] = iChamber->ROuter();
 171 //      pgpar[6] = pgpar[5]+dframep;
 172 //      pgpar[7] = +dframez/2;
 173 //      pgpar[8] = pgpar[5];
 174 //      pgpar[9] = pgpar[6];
 175 //      gMC->Gsvolu("S03O", "PGON", idAlu1, pgpar, 10);
 176 //      gMC->Gsvolu("S04O", "PGON", idAlu1, pgpar, 10);
 177 //      gMC->Gspos("S03O",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 178 //      gMC->Gspos("S03O",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 179 //      gMC->Gspos("S04O",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 180 //      gMC->Gspos("S04O",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 181 // //
 182 // // Inner frame
 183 //      tpar[0]= iChamber->RInner()-dframep;
 184 //      tpar[1]= iChamber->RInner();
 185 //      tpar[2]= dframez/2;
 186 //      gMC->Gsvolu("S03I", "TUBE", idAlu1, tpar, 3);
 187 //      gMC->Gsvolu("S04I", "TUBE", idAlu1, tpar, 3);
 188
 189 //      gMC->Gspos("S03I",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 190 //      gMC->Gspos("S03I",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 191 //      gMC->Gspos("S04I",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 192 //      gMC->Gspos("S04I",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 193 //
 194 // Frame Crosses
 195      if (frameCrosses) {
 196          // outside gas
 197          // security for inside mother volume
 198
 199          // ADDED !! Repeated
 200          Float_t dframep1 = 11.0;
 201          Float_t dframez = 3. * 8.9 / 100;
 202
 203          Float_t bpar[3];
 204          bpar[0] = (iChamber->ROuter() - iChamber->RInner())
 205            * TMath::Cos(TMath::ASin(dframep1 /
 206                                    (iChamber->ROuter() - iChamber->RInner())))
 207            / 2.0;
 208          bpar[1] = dframep1/2;
 209          // total thickness will be (4 * bpar[2]) for each chamber,
 210          // which has to be equal to (2 * dframez) - DAlu
 211          bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
 212          gMC->Gsvolu("S03B", "BOX", idAlu1, bpar, 3);
 213          gMC->Gsvolu("S04B", "BOX", idAlu1, bpar, 3);
 214
 215          gMC->Gspos("S03B",1,"S03M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 216                     irot1,"ONLY");
 217          gMC->Gspos("S03B",2,"S03M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 218                     irot1,"ONLY");
 219          gMC->Gspos("S03B",3,"S03M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 220                     irot2,"ONLY");
 221          gMC->Gspos("S03B",4,"S03M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 222                     irot2,"ONLY");
 223          gMC->Gspos("S03B",5,"S03M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
 224                     irot1,"ONLY");
 225          gMC->Gspos("S03B",6,"S03M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
 226                     irot1,"ONLY");
 227          gMC->Gspos("S03B",7,"S03M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
 228                     irot2,"ONLY");
 229          gMC->Gspos("S03B",8,"S03M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
 230                     irot2,"ONLY");
 231
 232          gMC->Gspos("S04B",1,"S04M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 233                     irot1,"ONLY");
 234          gMC->Gspos("S04B",2,"S04M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 235                     irot1,"ONLY");
 236          gMC->Gspos("S04B",3,"S04M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 237                     irot2,"ONLY");
 238          gMC->Gspos("S04B",4,"S04M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 239                     irot2,"ONLY");
 240          gMC->Gspos("S04B",5,"S04M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
 241                     irot1,"ONLY");
 242          gMC->Gspos("S04B",6,"S04M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
 243                     irot1,"ONLY");
 244          gMC->Gspos("S04B",7,"S04M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
 245                     irot2,"ONLY");
 246          gMC->Gspos("S04B",8,"S04M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
 247                     irot2,"ONLY");
 248      }
 249 //
 250 //   Chamber Material represented by Alu sheet
 251      tpar[0]= iChamber->RInner();
 252      tpar[1]= iChamber->ROuter();
 253      tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
 254      gMC->Gsvolu("S03A", "TUBE", idAlu2, tpar, 3);
 255      gMC->Gsvolu("S04A", "TUBE", idAlu2, tpar, 3);
 256      gMC->Gspos("S03A", 1, "S03M", 0., 0., 0.,  0, "ONLY");
 257      gMC->Gspos("S04A", 1, "S04M", 0., 0., 0.,  0, "ONLY");
 258 //
 259 //   Sensitive volumes
 260      // tpar[2] = iChamber->DGas();
 261      tpar[2] = iChamber->DGas()/2;
 262      gMC->Gsvolu("S03G", "TUBE", idGas, tpar, 3);
 263      gMC->Gsvolu("S04G", "TUBE", idGas, tpar, 3);
 264      gMC->Gspos("S03G", 1, "S03A", 0., 0., 0.,  0, "ONLY");
 265      gMC->Gspos("S04G", 1, "S04A", 0., 0., 0.,  0, "ONLY");
 266 //
 267 // Frame Crosses to be placed inside gas
 268      // NONE: chambers are sensitive everywhere
 269 //      if (frameCrosses) {
 270
 271 //       dr = (iChamber->ROuter() - iChamber->RInner());
 272 //       bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
 273 //       bpar[1] = dframep1/2;
 274 //       bpar[2] = iChamber->DGas()/2;
 275 //       gMC->Gsvolu("S03F", "BOX", idAlu1, bpar, 3);
 276 //       gMC->Gsvolu("S04F", "BOX", idAlu1, bpar, 3);
 277
 278 //       gMC->Gspos("S03F",1,"S03G", +iChamber->RInner()+bpar[0] , 0, 0,
 279 //                  irot1,"ONLY");
 280 //       gMC->Gspos("S03F",2,"S03G", -iChamber->RInner()-bpar[0] , 0, 0,
 281 //                  irot1,"ONLY");
 282 //       gMC->Gspos("S03F",3,"S03G", 0, +iChamber->RInner()+bpar[0] , 0,
 283 //                  irot2,"ONLY");
 284 //       gMC->Gspos("S03F",4,"S03G", 0, -iChamber->RInner()-bpar[0] , 0,
 285 //                  irot2,"ONLY");
 286
 287 //       gMC->Gspos("S04F",1,"S04G", +iChamber->RInner()+bpar[0] , 0, 0,
 288 //                  irot1,"ONLY");
 289 //       gMC->Gspos("S04F",2,"S04G", -iChamber->RInner()-bpar[0] , 0, 0,
 290 //                  irot1,"ONLY");
 291 //       gMC->Gspos("S04F",3,"S04G", 0, +iChamber->RInner()+bpar[0] , 0,
 292 //                  irot2,"ONLY");
 293 //       gMC->Gspos("S04F",4,"S04G", 0, -iChamber->RInner()-bpar[0] , 0,
 294 //                  irot2,"ONLY");
 295 //      }
 296 /*
 297      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[2];
 298      iChamber2 =(AliMUONChamber*) (*fChambers)[3];
 299      zpos1=iChamber1->Z();
 300      zpos2=iChamber2->Z();
 301      dstation = zpos2 - zpos1;
 302      // DGas and DAlu not changed from standard values
 303      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
 304
 305 //
 306 //   Mother volume
 307      tpar[0] = iChamber->RInner()-dframep;
 308      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 309      tpar[2] = dstation/5;
 310
 311      gMC->Gsvolu("S03M", "TUBE", idAir, tpar, 3);
 312      gMC->Gsvolu("S04M", "TUBE", idAir, tpar, 3);
 313      gMC->Gspos("S03M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 314      gMC->Gspos("S04M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 315      gMC->Gsbool("S03M", "L3DO");
 316      gMC->Gsbool("S03M", "L3O1");
 317      gMC->Gsbool("S03M", "L3O2");
 318      gMC->Gsbool("S04M", "L3DO");
 319      gMC->Gsbool("S04M", "L3O1");
 320      gMC->Gsbool("S04M", "L3O2");
 321
 322 // // Aluminium frames
 323 // // Outer frames
 324 //      pgpar[0] = 360/12/2;
 325 //      pgpar[1] = 360.;
 326 //      pgpar[2] = 12.;
 327 //      pgpar[3] =   2;
 328 //      pgpar[4] = -dframez/2;
 329 //      pgpar[5] = iChamber->ROuter();
 330 //      pgpar[6] = pgpar[5]+dframep;
 331 //      pgpar[7] = +dframez/2;
 332 //      pgpar[8] = pgpar[5];
 333 //      pgpar[9] = pgpar[6];
 334 //      gMC->Gsvolu("S03O", "PGON", idAlu1, pgpar, 10);
 335 //      gMC->Gsvolu("S04O", "PGON", idAlu1, pgpar, 10);
 336 //      gMC->Gspos("S03O",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 337 //      gMC->Gspos("S03O",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 338 //      gMC->Gspos("S04O",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 339 //      gMC->Gspos("S04O",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 340 // //
 341 // // Inner frame
 342 //      tpar[0]= iChamber->RInner()-dframep;
 343 //      tpar[1]= iChamber->RInner();
 344 //      tpar[2]= dframez/2;
 345 //      gMC->Gsvolu("S03I", "TUBE", idAlu1, tpar, 3);
 346 //      gMC->Gsvolu("S04I", "TUBE", idAlu1, tpar, 3);
 347
 348 //      gMC->Gspos("S03I",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 349 //      gMC->Gspos("S03I",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 350 //      gMC->Gspos("S04I",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 351 //      gMC->Gspos("S04I",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 352 //
 353 // Frame Crosses
 354      if (frameCrosses) {
 355          // outside gas
 356          // security for inside mother volume
 357          bpar[0] = (iChamber->ROuter() - iChamber->RInner())
 358            * TMath::Cos(TMath::ASin(dframep1 /
 359                                    (iChamber->ROuter() - iChamber->RInner())))
 360            / 2.0;
 361          bpar[1] = dframep1/2;
 362          // total thickness will be (4 * bpar[2]) for each chamber,
 363          // which has to be equal to (2 * dframez) - DAlu
 364          bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
 365          gMC->Gsvolu("S03B", "BOX", idAlu1, bpar, 3);
 366          gMC->Gsvolu("S04B", "BOX", idAlu1, bpar, 3);
 367
 368          gMC->Gspos("S03B",1,"S03M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 369                     irot1,"ONLY");
 370          gMC->Gspos("S03B",2,"S03M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 371                     irot1,"ONLY");
 372          gMC->Gspos("S03B",3,"S03M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 373                     irot2,"ONLY");
 374          gMC->Gspos("S03B",4,"S03M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 375                     irot2,"ONLY");
 376          gMC->Gspos("S03B",5,"S03M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
 377                     irot1,"ONLY");
 378          gMC->Gspos("S03B",6,"S03M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
 379                     irot1,"ONLY");
 380          gMC->Gspos("S03B",7,"S03M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
 381                     irot2,"ONLY");
 382          gMC->Gspos("S03B",8,"S03M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
 383                     irot2,"ONLY");
 384
 385          gMC->Gspos("S04B",1,"S04M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 386                     irot1,"ONLY");
 387          gMC->Gspos("S04B",2,"S04M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 388                     irot1,"ONLY");
 389          gMC->Gspos("S04B",3,"S04M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 390                     irot2,"ONLY");
 391          gMC->Gspos("S04B",4,"S04M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 392                     irot2,"ONLY");
 393          gMC->Gspos("S04B",5,"S04M", +iChamber->RInner()+bpar[0] , 0,+zfpos,
 394                     irot1,"ONLY");
 395          gMC->Gspos("S04B",6,"S04M", -iChamber->RInner()-bpar[0] , 0,+zfpos,
 396                     irot1,"ONLY");
 397          gMC->Gspos("S04B",7,"S04M", 0, +iChamber->RInner()+bpar[0] ,+zfpos,
 398                     irot2,"ONLY");
 399          gMC->Gspos("S04B",8,"S04M", 0, -iChamber->RInner()-bpar[0] ,+zfpos,
 400                     irot2,"ONLY");
 401      }
 402 //
 403 //   Chamber Material represented by Alu sheet
 404      tpar[0]= iChamber->RInner();
 405      tpar[1]= iChamber->ROuter();
 406      tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
 407      gMC->Gsvolu("S03A", "TUBE", idAlu2, tpar, 3);
 408      gMC->Gsvolu("S04A", "TUBE", idAlu2, tpar, 3);
 409      gMC->Gspos("S03A", 1, "S03M", 0., 0., 0.,  0, "ONLY");
 410      gMC->Gspos("S04A", 1, "S04M", 0., 0., 0.,  0, "ONLY");
 411 //
 412 //   Sensitive volumes
 413      // tpar[2] = iChamber->DGas();
 414      tpar[2] = iChamber->DGas()/2;
 415      gMC->Gsvolu("S03G", "TUBE", idGas, tpar, 3);
 416      gMC->Gsvolu("S04G", "TUBE", idGas, tpar, 3);
 417      gMC->Gspos("S03G", 1, "S03A", 0., 0., 0.,  0, "ONLY");
 418      gMC->Gspos("S04G", 1, "S04A", 0., 0., 0.,  0, "ONLY");
 419 //
 420 // Frame Crosses to be placed inside gas
 421      // NONE: chambers are sensitive everywhere
 422 //      if (frameCrosses) {
 423
 424 //       dr = (iChamber->ROuter() - iChamber->RInner());
 425 //       bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
 426 //       bpar[1] = dframep1/2;
 427 //       bpar[2] = iChamber->DGas()/2;
 428 //       gMC->Gsvolu("S03F", "BOX", idAlu1, bpar, 3);
 429 //       gMC->Gsvolu("S04F", "BOX", idAlu1, bpar, 3);
 430
 431 //       gMC->Gspos("S03F",1,"S03G", +iChamber->RInner()+bpar[0] , 0, 0,
 432 //                  irot1,"ONLY");
 433 //       gMC->Gspos("S03F",2,"S03G", -iChamber->RInner()-bpar[0] , 0, 0,
 434 //                  irot1,"ONLY");
 435 //       gMC->Gspos("S03F",3,"S03G", 0, +iChamber->RInner()+bpar[0] , 0,
 436 //                  irot2,"ONLY");
 437 //       gMC->Gspos("S03F",4,"S03G", 0, -iChamber->RInner()-bpar[0] , 0,
 438 //                  irot2,"ONLY");
 439
 440 //       gMC->Gspos("S04F",1,"S04G", +iChamber->RInner()+bpar[0] , 0, 0,
 441 //                  irot1,"ONLY");
 442 //       gMC->Gspos("S04F",2,"S04G", -iChamber->RInner()-bpar[0] , 0, 0,
 443 //                  irot1,"ONLY");
 444 //       gMC->Gspos("S04F",3,"S04G", 0, +iChamber->RInner()+bpar[0] , 0,
 445 //                  irot2,"ONLY");
 446 //       gMC->Gspos("S04F",4,"S04G", 0, -iChamber->RInner()-bpar[0] , 0,
 447 //                  irot2,"ONLY");
 448 //      }
 449      }
 450 */
 451 }
 452
 453 //______________________________________________________________________________
 454 void AliMUONSt2GeometryBuilder::SetTransformations()
 455 {
 456 // Defines the transformations for the station2 chambers.
 457 // ---
 458
 459   AliMUONChamber* iChamber1 = GetChamber(2);
 460   Double_t zpos1 = - iChamber1->Z();
 461   iChamber1->GetGeometry()
 462     ->SetTranslation(TGeoTranslation(0., 0., zpos1));
 463
 464   AliMUONChamber* iChamber2 = GetChamber(3);
 465   Double_t zpos2 = - iChamber2->Z();
 466   iChamber2->GetGeometry()
 467     ->SetTranslation(TGeoTranslation(0., 0., zpos2));
 468 }
 469
 470 //______________________________________________________________________________
 471 void AliMUONSt2GeometryBuilder::SetSensitiveVolumes()
 472 {
 473 // Defines the sensitive volumes for station2 chambers.
 474 // ---
 475
 476   GetChamber(2)->GetGeometry()->SetSensitiveVolume("S03G");
 477   GetChamber(3)->GetGeometry()->SetSensitiveVolume("S04G");
 478 }