MUON/AliMUONv3.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *      SigmaEffect_thetadegrees                                                                  *
   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 purpeateose. It is      *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 /////////////////////////////////////////////////////////
  19 //  Manager and hits classes for set:MUON version 3    //
  20 /////////////////////////////////////////////////////////
  21
  22 // Old MUONv1 class
  23 // (AliMUONv1.h 1.11, AliMUONv1.cxx 1.60)
  24 // - now replaced with a new one where geometry and materials
  25 // are created using new geometry builders
  26 // (See ALIMUON*GeometryBuilder classes)
  27 // To be removed later
  28
  29 #include <TRandom.h>
  30 #include <TF1.h>
  31 #include <TClonesArray.h>
  32 #include <TRandom.h>
  33 #include <TVirtualMC.h>
  34
  35 #include "AliMUONv3.h"
  36 #include "AliConst.h"
  37 #include "AliMUONChamber.h"
  38 #include "AliMUONConstants.h"
  39 #include "AliMUONFactory.h"
  40 #include "AliMUONHit.h"
  41 #include "AliMUONTriggerCircuit.h"
  42 #include "AliMUONChamberGeometry.h"
  43 #include "AliMagF.h"
  44 #include "AliRun.h"
  45 #include "AliMC.h"
  46 #include "AliLog.h"
  47
  48 ClassImp(AliMUONv3)
  49
  50 //___________________________________________
  51 AliMUONv3::AliMUONv3()
  52  : AliMUON(),
  53    fTrackMomentum(), fTrackPosition()
  54 {
  55 // Constructor
  56     fChambers   = 0;
  57     fStations   = 0;
  58     fStepManagerVersionOld  = kFALSE;
  59     fAngleEffect = kTRUE;
  60     fStepMaxInActiveGas     = 0.6;
  61     fStepSum    =  0x0;
  62     fDestepSum  =  0x0;
  63     fElossRatio =  0x0;
  64     fAngleEffect10   = 0x0;
  65     fAngleEffectNorma= 0x0;
  66 }
  67 //___________________________________________
  68 AliMUONv3::AliMUONv3(const char *name, const char *title)
  69   : AliMUON(name,title),
  70     fTrackMomentum(), fTrackPosition()
  71 {
  72 // Constructor
  73     // By default include all stations
  74     fStations = new Int_t[5];
  75     for (Int_t i=0; i<5; i++) fStations[i] = 1;
  76
  77     AliMUONFactory factory;
  78     factory.Build(this, title);
  79
  80     fStepManagerVersionOld = kFALSE;
  81     fAngleEffect = kTRUE;
  82     fStepMaxInActiveGas = 0.6;
  83
  84     fStepSum   = new Float_t [AliMUONConstants::NCh()];
  85     fDestepSum = new Float_t [AliMUONConstants::NCh()];
  86     for (Int_t i=0; i<AliMUONConstants::NCh(); i++) {
  87       fStepSum[i] =0.0;
  88       fDestepSum[i]=0.0;
  89     }
  90     // Ratio of particle mean eloss with respect MIP's Khalil Boudjemline, sep 2003, PhD.Thesis and Particle Data Book
  91     fElossRatio = new TF1("ElossRatio","[0]+[1]*x+[2]*x*x+[3]*x*x*x+[4]*x*x*x*x",0.5,5.);
  92     fElossRatio->SetParameter(0,1.02138);
  93     fElossRatio->SetParameter(1,-9.54149e-02);
  94     fElossRatio->SetParameter(2,+7.83433e-02);
  95     fElossRatio->SetParameter(3,-9.98208e-03);
  96     fElossRatio->SetParameter(4,+3.83279e-04);
  97
  98     // Angle effect in tracking chambers at theta =10 degres as a function of ElossRatio (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) (in micrometers)
  99     fAngleEffect10 = new TF1("AngleEffect10","[0]+[1]*x+[2]*x*x",0.5,3.0);
 100     fAngleEffect10->SetParameter(0, 1.90691e+02);
 101     fAngleEffect10->SetParameter(1,-6.62258e+01);
 102     fAngleEffect10->SetParameter(2,+1.28247e+01);
 103     // Angle effect: Normalisation form theta=10 degres to theta between 0 and 10 (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis)
 104     // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
 105     fAngleEffectNorma = new TF1("AngleEffectNorma","[0]+[1]*x+[2]*x*x+[3]*x*x*x",0.0,10.0);
 106     fAngleEffectNorma->SetParameter(0,4.148);
 107     fAngleEffectNorma->SetParameter(1,-6.809e-01);
 108     fAngleEffectNorma->SetParameter(2,5.151e-02);
 109     fAngleEffectNorma->SetParameter(3,-1.490e-03);
 110 }
 111
 112 //_____________________________________________________________________________
 113 AliMUONv3::AliMUONv3(const AliMUONv3& right)
 114   : AliMUON(right)
 115 {
 116   // copy constructor (not implemented)
 117
 118   AliFatal("Copy constructor not provided.");
 119 }
 120
 121 //_____________________________________________________________________________
 122 AliMUONv3& AliMUONv3::operator=(const AliMUONv3& right)
 123 {
 124   // assignement operator (not implemented)
 125
 126   // check assignement to self
 127   if (this == &right) return *this;
 128
 129   AliFatal("Assignement operator not provided.");
 130
 131   return *this;
 132 }
 133
 134 //___________________________________________
 135 void AliMUONv3::CreateGeometry()
 136 {
 137 //
 138 //   Note: all chambers have the same structure, which could be
 139 //   easily parameterised. This was intentionally not done in order
 140 //   to give a starting point for the implementation of the actual
 141 //   design of each station.
 142   Int_t *idtmed = fIdtmed->GetArray()-1099;
 143
 144 //   Distance between Stations
 145 //
 146      Float_t bpar[3];
 147      Float_t tpar[3];
 148 //      Float_t pgpar[10];
 149      Float_t zpos1, zpos2, zfpos;
 150      // Outer excess and inner recess for mother volume radius
 151      // with respect to ROuter and RInner
 152      Float_t dframep=.001; // Value for station 3 should be 6 ...
 153      // Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
 154 //      Float_t dframep1=.001;
 155      Float_t dframep1 = 11.0;
 156 //      Bool_t frameCrosses=kFALSE;
 157      Bool_t frameCrosses=kTRUE;
 158      Float_t *dum=0;
 159
 160 //      Float_t dframez=0.9;
 161      // Half of the total thickness of frame crosses (including DAlu)
 162      // for each chamber in stations 1 and 2:
 163      // 3% of X0 of composite material,
 164      // but taken as Aluminium here, with same thickness in number of X0
 165      Float_t dframez = 3. * 8.9 / 100;
 166 //      Float_t dr;
 167      Float_t dstation;
 168
 169 //
 170 //   Rotation matrices in the x-y plane
 171      Int_t idrotm[1199];
 172 //   phi=   0 deg
 173      AliMatrix(idrotm[1100],  90.,   0., 90.,  90., 0., 0.);
 174 //   phi=  90 deg
 175      AliMatrix(idrotm[1101],  90.,  90., 90., 180., 0., 0.);
 176 //   phi= 180 deg
 177      AliMatrix(idrotm[1102],  90., 180., 90., 270., 0., 0.);
 178 //   phi= 270 deg
 179      AliMatrix(idrotm[1103],  90., 270., 90.,   0., 0., 0.);
 180 //
 181      Float_t phi=2*TMath::Pi()/12/2;
 182
 183 //
 184 //   pointer to the current chamber
 185 //   pointer to the current chamber
 186      Int_t idAlu1=idtmed[1103]; // medium 4
 187      Int_t idAlu2=idtmed[1104]; // medium 5
 188 //     Int_t idAlu1=idtmed[1100];
 189 //     Int_t idAlu2=idtmed[1100];
 190      Int_t idAir=idtmed[1100]; // medium 1
 191 //      Int_t idGas=idtmed[1105]; // medium 6 = Ar-isoC4H10 gas
 192      Int_t idGas=idtmed[1108]; // medium 9 = Ar-CO2 gas (80%+20%)
 193
 194
 195      AliMUONChamber *iChamber, *iChamber1, *iChamber2;
 196
 197      if (fStations[0]) {
 198
 199 //********************************************************************
 200 //                            Station 1                             **
 201 //********************************************************************
 202 //  CONCENTRIC
 203      // indices 1 and 2 for first and second chambers in the station
 204      // iChamber (first chamber) kept for other quanties than Z,
 205      // assumed to be the same in both chambers
 206      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[0];
 207      iChamber2 =(AliMUONChamber*) (*fChambers)[1];
 208      zpos1=iChamber1->Z();
 209      zpos2=iChamber2->Z();
 210      dstation = TMath::Abs(zpos2 - zpos1);
 211      // DGas decreased from standard one (0.5)
 212      iChamber->SetDGas(0.4); iChamber2->SetDGas(0.4);
 213      // DAlu increased from standard one (3% of X0),
 214      // because more electronics with smaller pads
 215      iChamber->SetDAlu(3.5 * 8.9 / 100.); iChamber2->SetDAlu(3.5 * 8.9 / 100.);
 216      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
 217
 218 //
 219 //   Mother volume
 220      tpar[0] = iChamber->RInner()-dframep;
 221      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 222      tpar[2] = dstation/5;
 223
 224      gMC->Gsvolu("S01M", "TUBE", idAir, tpar, 3);
 225      gMC->Gsvolu("S02M", "TUBE", idAir, tpar, 3);
 226      gMC->Gspos("S01M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 227      gMC->Gspos("S02M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 228 // // Aluminium frames
 229 // // Outer frames
 230 //      pgpar[0] = 360/12/2;
 231 //      pgpar[1] = 360.;
 232 //      pgpar[2] = 12.;
 233 //      pgpar[3] =   2;
 234 //      pgpar[4] = -dframez/2;
 235 //      pgpar[5] = iChamber->ROuter();
 236 //      pgpar[6] = pgpar[5]+dframep1;
 237 //      pgpar[7] = +dframez/2;
 238 //      pgpar[8] = pgpar[5];
 239 //      pgpar[9] = pgpar[6];
 240 //      gMC->Gsvolu("S01O", "PGON", idAlu1, pgpar, 10);
 241 //      gMC->Gsvolu("S02O", "PGON", idAlu1, pgpar, 10);
 242 //      gMC->Gspos("S01O",1,"S01M", 0.,0.,-zfpos,  0,"ONLY");
 243 //      gMC->Gspos("S01O",2,"S01M", 0.,0.,+zfpos,  0,"ONLY");
 244 //      gMC->Gspos("S02O",1,"S02M", 0.,0.,-zfpos,  0,"ONLY");
 245 //      gMC->Gspos("S02O",2,"S02M", 0.,0.,+zfpos,  0,"ONLY");
 246 // //
 247 // // Inner frame
 248 //      tpar[0]= iChamber->RInner()-dframep1;
 249 //      tpar[1]= iChamber->RInner();
 250 //      tpar[2]= dframez/2;
 251 //      gMC->Gsvolu("S01I", "TUBE", idAlu1, tpar, 3);
 252 //      gMC->Gsvolu("S02I", "TUBE", idAlu1, tpar, 3);
 253
 254 //      gMC->Gspos("S01I",1,"S01M", 0.,0.,-zfpos,  0,"ONLY");
 255 //      gMC->Gspos("S01I",2,"S01M", 0.,0.,+zfpos,  0,"ONLY");
 256 //      gMC->Gspos("S02I",1,"S02M", 0.,0.,-zfpos,  0,"ONLY");
 257 //      gMC->Gspos("S02I",2,"S02M", 0.,0.,+zfpos,  0,"ONLY");
 258 //
 259 // Frame Crosses
 260      if (frameCrosses) {
 261          // outside gas
 262          // security for inside mother volume
 263          bpar[0] = (iChamber->ROuter() - iChamber->RInner())
 264            * TMath::Cos(TMath::ASin(dframep1 /
 265                                    (iChamber->ROuter() - iChamber->RInner())))
 266            / 2.0;
 267          bpar[1] = dframep1/2;
 268          // total thickness will be (4 * bpar[2]) for each chamber,
 269          // which has to be equal to (2 * dframez) - DAlu
 270          bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
 271          gMC->Gsvolu("S01B", "BOX", idAlu1, bpar, 3);
 272          gMC->Gsvolu("S02B", "BOX", idAlu1, bpar, 3);
 273
 274          gMC->Gspos("S01B",1,"S01M", -iChamber->RInner()-bpar[0] , 0, zfpos,
 275                     idrotm[1100],"ONLY");
 276          gMC->Gspos("S01B",2,"S01M",  iChamber->RInner()+bpar[0] , 0, zfpos,
 277                     idrotm[1100],"ONLY");
 278          gMC->Gspos("S01B",3,"S01M", 0, -iChamber->RInner()-bpar[0] , zfpos,
 279                     idrotm[1101],"ONLY");
 280          gMC->Gspos("S01B",4,"S01M", 0,  iChamber->RInner()+bpar[0] , zfpos,
 281                     idrotm[1101],"ONLY");
 282          gMC->Gspos("S01B",5,"S01M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 283                     idrotm[1100],"ONLY");
 284          gMC->Gspos("S01B",6,"S01M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 285                     idrotm[1100],"ONLY");
 286          gMC->Gspos("S01B",7,"S01M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 287                     idrotm[1101],"ONLY");
 288          gMC->Gspos("S01B",8,"S01M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 289                     idrotm[1101],"ONLY");
 290
 291          gMC->Gspos("S02B",1,"S02M", -iChamber->RInner()-bpar[0] , 0, zfpos,
 292                     idrotm[1100],"ONLY");
 293          gMC->Gspos("S02B",2,"S02M",  iChamber->RInner()+bpar[0] , 0, zfpos,
 294                     idrotm[1100],"ONLY");
 295          gMC->Gspos("S02B",3,"S02M", 0, -iChamber->RInner()-bpar[0] , zfpos,
 296                     idrotm[1101],"ONLY");
 297          gMC->Gspos("S02B",4,"S02M", 0,  iChamber->RInner()+bpar[0] , zfpos,
 298                     idrotm[1101],"ONLY");
 299          gMC->Gspos("S02B",5,"S02M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 300                     idrotm[1100],"ONLY");
 301          gMC->Gspos("S02B",6,"S02M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 302                     idrotm[1100],"ONLY");
 303          gMC->Gspos("S02B",7,"S02M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 304                     idrotm[1101],"ONLY");
 305          gMC->Gspos("S02B",8,"S02M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 306                     idrotm[1101],"ONLY");
 307      }
 308 //
 309 //   Chamber Material represented by Alu sheet
 310      tpar[0]= iChamber->RInner();
 311      tpar[1]= iChamber->ROuter();
 312      tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
 313      gMC->Gsvolu("S01A", "TUBE",  idAlu2, tpar, 3);
 314      gMC->Gsvolu("S02A", "TUBE",idAlu2, tpar, 3);
 315      gMC->Gspos("S01A", 1, "S01M", 0., 0., 0.,  0, "ONLY");
 316      gMC->Gspos("S02A", 1, "S02M", 0., 0., 0.,  0, "ONLY");
 317 //
 318 //   Sensitive volumes
 319      // tpar[2] = iChamber->DGas();
 320      tpar[2] = iChamber->DGas()/2;
 321      gMC->Gsvolu("S01G", "TUBE", idGas, tpar, 3);
 322      gMC->Gsvolu("S02G", "TUBE", idGas, tpar, 3);
 323      gMC->Gspos("S01G", 1, "S01A", 0., 0., 0.,  0, "ONLY");
 324      gMC->Gspos("S02G", 1, "S02A", 0., 0., 0.,  0, "ONLY");
 325 //
 326 // Frame Crosses to be placed inside gas
 327      // NONE: chambers are sensitive everywhere
 328 //      if (frameCrosses) {
 329
 330 //       dr = (iChamber->ROuter() - iChamber->RInner());
 331 //       bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
 332 //       bpar[1] = dframep1/2;
 333 //       bpar[2] = iChamber->DGas()/2;
 334 //       gMC->Gsvolu("S01F", "BOX", idAlu1, bpar, 3);
 335 //       gMC->Gsvolu("S02F", "BOX", idAlu1, bpar, 3);
 336
 337 //       gMC->Gspos("S01F",1,"S01G", +iChamber->RInner()+bpar[0] , 0, 0,
 338 //                  idrotm[1100],"ONLY");
 339 //       gMC->Gspos("S01F",2,"S01G", -iChamber->RInner()-bpar[0] , 0, 0,
 340 //                  idrotm[1100],"ONLY");
 341 //       gMC->Gspos("S01F",3,"S01G", 0, +iChamber->RInner()+bpar[0] , 0,
 342 //                  idrotm[1101],"ONLY");
 343 //       gMC->Gspos("S01F",4,"S01G", 0, -iChamber->RInner()-bpar[0] , 0,
 344 //                  idrotm[1101],"ONLY");
 345
 346 //       gMC->Gspos("S02F",1,"S02G", +iChamber->RInner()+bpar[0] , 0, 0,
 347 //                  idrotm[1100],"ONLY");
 348 //       gMC->Gspos("S02F",2,"S02G", -iChamber->RInner()-bpar[0] , 0, 0,
 349 //                  idrotm[1100],"ONLY");
 350 //       gMC->Gspos("S02F",3,"S02G", 0, +iChamber->RInner()+bpar[0] , 0,
 351 //                  idrotm[1101],"ONLY");
 352 //       gMC->Gspos("S02F",4,"S02G", 0, -iChamber->RInner()-bpar[0] , 0,
 353 //                  idrotm[1101],"ONLY");
 354 //      }
 355      }
 356      if (fStations[1]) {
 357
 358 //********************************************************************
 359 //                            Station 2                             **
 360 //********************************************************************
 361      // indices 1 and 2 for first and second chambers in the station
 362      // iChamber (first chamber) kept for other quanties than Z,
 363      // assumed to be the same in both chambers
 364      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[2];
 365      iChamber2 =(AliMUONChamber*) (*fChambers)[3];
 366      zpos1=iChamber1->Z();
 367      zpos2=iChamber2->Z();
 368      dstation = TMath::Abs(zpos2 - zpos1);
 369      // DGas and DAlu not changed from standard values
 370      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
 371
 372 //
 373 //   Mother volume
 374      tpar[0] = iChamber->RInner()-dframep;
 375      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 376      tpar[2] = dstation/5;
 377
 378      gMC->Gsvolu("S03M", "TUBE", idAir, tpar, 3);
 379      gMC->Gsvolu("S04M", "TUBE", idAir, tpar, 3);
 380      gMC->Gspos("S03M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 381      gMC->Gspos("S04M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 382      gMC->Gsbool("S03M", "L3DO");
 383      gMC->Gsbool("S03M", "L3O1");
 384      gMC->Gsbool("S03M", "L3O2");
 385      gMC->Gsbool("S04M", "L3DO");
 386      gMC->Gsbool("S04M", "L3O1");
 387      gMC->Gsbool("S04M", "L3O2");
 388
 389 // // Aluminium frames
 390 // // Outer frames
 391 //      pgpar[0] = 360/12/2;
 392 //      pgpar[1] = 360.;
 393 //      pgpar[2] = 12.;
 394 //      pgpar[3] =   2;
 395 //      pgpar[4] = -dframez/2;
 396 //      pgpar[5] = iChamber->ROuter();
 397 //      pgpar[6] = pgpar[5]+dframep;
 398 //      pgpar[7] = +dframez/2;
 399 //      pgpar[8] = pgpar[5];
 400 //      pgpar[9] = pgpar[6];
 401 //      gMC->Gsvolu("S03O", "PGON", idAlu1, pgpar, 10);
 402 //      gMC->Gsvolu("S04O", "PGON", idAlu1, pgpar, 10);
 403 //      gMC->Gspos("S03O",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 404 //      gMC->Gspos("S03O",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 405 //      gMC->Gspos("S04O",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 406 //      gMC->Gspos("S04O",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 407 // //
 408 // // Inner frame
 409 //      tpar[0]= iChamber->RInner()-dframep;
 410 //      tpar[1]= iChamber->RInner();
 411 //      tpar[2]= dframez/2;
 412 //      gMC->Gsvolu("S03I", "TUBE", idAlu1, tpar, 3);
 413 //      gMC->Gsvolu("S04I", "TUBE", idAlu1, tpar, 3);
 414
 415 //      gMC->Gspos("S03I",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 416 //      gMC->Gspos("S03I",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 417 //      gMC->Gspos("S04I",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 418 //      gMC->Gspos("S04I",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 419 //
 420 // Frame Crosses
 421      if (frameCrosses) {
 422          // outside gas
 423          // security for inside mother volume
 424          bpar[0] = (iChamber->ROuter() - iChamber->RInner())
 425            * TMath::Cos(TMath::ASin(dframep1 /
 426                                    (iChamber->ROuter() - iChamber->RInner())))
 427            / 2.0;
 428          bpar[1] = dframep1/2;
 429          // total thickness will be (4 * bpar[2]) for each chamber,
 430          // which has to be equal to (2 * dframez) - DAlu
 431          bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
 432          gMC->Gsvolu("S03B", "BOX", idAlu1, bpar, 3);
 433          gMC->Gsvolu("S04B", "BOX", idAlu1, bpar, 3);
 434
 435          gMC->Gspos("S03B",1,"S03M", -iChamber->RInner()-bpar[0] , 0, zfpos,
 436                     idrotm[1100],"ONLY");
 437          gMC->Gspos("S03B",2,"S03M", +iChamber->RInner()+bpar[0] , 0, zfpos,
 438                     idrotm[1100],"ONLY");
 439          gMC->Gspos("S03B",3,"S03M", 0, -iChamber->RInner()-bpar[0] , zfpos,
 440                     idrotm[1101],"ONLY");
 441          gMC->Gspos("S03B",4,"S03M", 0, +iChamber->RInner()+bpar[0] , zfpos,
 442                     idrotm[1101],"ONLY");
 443          gMC->Gspos("S03B",5,"S03M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 444                     idrotm[1100],"ONLY");
 445          gMC->Gspos("S03B",6,"S03M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 446                     idrotm[1100],"ONLY");
 447          gMC->Gspos("S03B",7,"S03M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 448                     idrotm[1101],"ONLY");
 449          gMC->Gspos("S03B",8,"S03M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 450                     idrotm[1101],"ONLY");
 451
 452          gMC->Gspos("S04B",1,"S04M", -iChamber->RInner()-bpar[0] , 0, zfpos,
 453                     idrotm[1100],"ONLY");
 454          gMC->Gspos("S04B",2,"S04M", +iChamber->RInner()+bpar[0] , 0, zfpos,
 455                     idrotm[1100],"ONLY");
 456          gMC->Gspos("S04B",3,"S04M", 0, -iChamber->RInner()-bpar[0] , zfpos,
 457                     idrotm[1101],"ONLY");
 458          gMC->Gspos("S04B",4,"S04M", 0, +iChamber->RInner()+bpar[0] , zfpos,
 459                     idrotm[1101],"ONLY");
 460          gMC->Gspos("S04B",5,"S04M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 461                     idrotm[1100],"ONLY");
 462          gMC->Gspos("S04B",6,"S04M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 463                     idrotm[1100],"ONLY");
 464          gMC->Gspos("S04B",7,"S04M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 465                     idrotm[1101],"ONLY");
 466          gMC->Gspos("S04B",8,"S04M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 467                     idrotm[1101],"ONLY");
 468      }
 469 //
 470 //   Chamber Material represented by Alu sheet
 471      tpar[0]= iChamber->RInner();
 472      tpar[1]= iChamber->ROuter();
 473      tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
 474      gMC->Gsvolu("S03A", "TUBE", idAlu2, tpar, 3);
 475      gMC->Gsvolu("S04A", "TUBE", idAlu2, tpar, 3);
 476      gMC->Gspos("S03A", 1, "S03M", 0., 0., 0.,  0, "ONLY");
 477      gMC->Gspos("S04A", 1, "S04M", 0., 0., 0.,  0, "ONLY");
 478 //
 479 //   Sensitive volumes
 480      // tpar[2] = iChamber->DGas();
 481      tpar[2] = iChamber->DGas()/2;
 482      gMC->Gsvolu("S03G", "TUBE", idGas, tpar, 3);
 483      gMC->Gsvolu("S04G", "TUBE", idGas, tpar, 3);
 484      gMC->Gspos("S03G", 1, "S03A", 0., 0., 0.,  0, "ONLY");
 485      gMC->Gspos("S04G", 1, "S04A", 0., 0., 0.,  0, "ONLY");
 486 //
 487 // Frame Crosses to be placed inside gas
 488      // NONE: chambers are sensitive everywhere
 489 //      if (frameCrosses) {
 490
 491 //       dr = (iChamber->ROuter() - iChamber->RInner());
 492 //       bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
 493 //       bpar[1] = dframep1/2;
 494 //       bpar[2] = iChamber->DGas()/2;
 495 //       gMC->Gsvolu("S03F", "BOX", idAlu1, bpar, 3);
 496 //       gMC->Gsvolu("S04F", "BOX", idAlu1, bpar, 3);
 497
 498 //       gMC->Gspos("S03F",1,"S03G", +iChamber->RInner()+bpar[0] , 0, 0,
 499 //                  idrotm[1100],"ONLY");
 500 //       gMC->Gspos("S03F",2,"S03G", -iChamber->RInner()-bpar[0] , 0, 0,
 501 //                  idrotm[1100],"ONLY");
 502 //       gMC->Gspos("S03F",3,"S03G", 0, +iChamber->RInner()+bpar[0] , 0,
 503 //                  idrotm[1101],"ONLY");
 504 //       gMC->Gspos("S03F",4,"S03G", 0, -iChamber->RInner()-bpar[0] , 0,
 505 //                  idrotm[1101],"ONLY");
 506
 507 //       gMC->Gspos("S04F",1,"S04G", +iChamber->RInner()+bpar[0] , 0, 0,
 508 //                  idrotm[1100],"ONLY");
 509 //       gMC->Gspos("S04F",2,"S04G", -iChamber->RInner()-bpar[0] , 0, 0,
 510 //                  idrotm[1100],"ONLY");
 511 //       gMC->Gspos("S04F",3,"S04G", 0, +iChamber->RInner()+bpar[0] , 0,
 512 //                  idrotm[1101],"ONLY");
 513 //       gMC->Gspos("S04F",4,"S04G", 0, -iChamber->RInner()-bpar[0] , 0,
 514 //                  idrotm[1101],"ONLY");
 515 //      }
 516      }
 517      // define the id of tracking media:
 518      Int_t idCopper = idtmed[1110];
 519      Int_t idGlass  = idtmed[1111];
 520      Int_t idCarbon = idtmed[1112];
 521      Int_t idRoha   = idtmed[1113];
 522
 523       // sensitive area: 40*40 cm**2
 524      const Float_t ksensLength = 40.;
 525      const Float_t ksensHeight = 40.;
 526      const Float_t ksensWidth  = 0.5; // according to TDR fig 2.120
 527      const Int_t ksensMaterial = idGas;
 528      const Float_t kyOverlap   = 1.5;
 529
 530      // PCB dimensions in cm; width: 30 mum copper
 531      const Float_t kpcbLength  = ksensLength;
 532      const Float_t kpcbHeight  = 60.;
 533      const Float_t kpcbWidth   = 0.003;
 534      const Int_t   kpcbMaterial= idCopper;
 535
 536      // Insulating material: 200 mum glass fiber glued to pcb
 537      const Float_t kinsuLength = kpcbLength;
 538      const Float_t kinsuHeight = kpcbHeight;
 539      const Float_t kinsuWidth  = 0.020;
 540      const Int_t kinsuMaterial = idGlass;
 541
 542      // Carbon fiber panels: 200mum carbon/epoxy skin
 543      const Float_t kpanelLength = ksensLength;
 544      const Float_t kpanelHeight = ksensHeight;
 545      const Float_t kpanelWidth  = 0.020;
 546      const Int_t kpanelMaterial = idCarbon;
 547
 548      // rohacell between the two carbon panels
 549      const Float_t krohaLength = ksensLength;
 550      const Float_t krohaHeight = ksensHeight;
 551      const Float_t krohaWidth  = 0.5;
 552      const Int_t krohaMaterial = idRoha;
 553
 554      // Frame around the slat: 2 sticks along length,2 along height
 555      // H: the horizontal ones
 556      const Float_t khFrameLength = kpcbLength;
 557      const Float_t khFrameHeight = 1.5;
 558      const Float_t khFrameWidth  = ksensWidth;
 559      const Int_t khFrameMaterial = idGlass;
 560
 561      // V: the vertical ones
 562      const Float_t kvFrameLength = 4.0;
 563      const Float_t kvFrameHeight = ksensHeight + khFrameHeight;
 564      const Float_t kvFrameWidth  = ksensWidth;
 565      const Int_t kvFrameMaterial = idGlass;
 566
 567      // B: the horizontal border filled with rohacell
 568      const Float_t kbFrameLength = khFrameLength;
 569      const Float_t kbFrameHeight = (kpcbHeight - ksensHeight)/2. - khFrameHeight;
 570      const Float_t kbFrameWidth  = khFrameWidth;
 571      const Int_t kbFrameMaterial = idRoha;
 572
 573      // NULOC: 30 mum copper + 200 mum vetronite (same radiation length as 14mum copper)
 574      const Float_t knulocLength = 2.5;
 575      const Float_t knulocHeight = 7.5;
 576      const Float_t knulocWidth  = 0.0030 + 0.0014; // equivalent copper width of vetronite;
 577      const Int_t   knulocMaterial = idCopper;
 578
 579      const Float_t kslatHeight = kpcbHeight;
 580      const Float_t kslatWidth = ksensWidth + 2.*(kpcbWidth + kinsuWidth +
 581                                                2.* kpanelWidth + krohaWidth);
 582      const Int_t kslatMaterial = idAir;
 583      const Float_t kdSlatLength = kvFrameLength; // border on left and right
 584
 585      Float_t spar[3];
 586      Int_t i, j;
 587
 588      // the panel volume contains the rohacell
 589
 590      Float_t twidth = 2 * kpanelWidth + krohaWidth;
 591      Float_t panelpar[3] = { kpanelLength/2., kpanelHeight/2., twidth/2. };
 592      Float_t rohapar[3] = { krohaLength/2., krohaHeight/2., krohaWidth/2. };
 593
 594      // insulating material contains PCB-> gas-> 2 borders filled with rohacell
 595
 596      twidth = 2*(kinsuWidth + kpcbWidth) + ksensWidth;
 597      Float_t insupar[3] = { kinsuLength/2., kinsuHeight/2., twidth/2. };
 598      twidth -= 2 * kinsuWidth;
 599      Float_t pcbpar[3] = { kpcbLength/2., kpcbHeight/2., twidth/2. };
 600      Float_t senspar[3] = { ksensLength/2., ksensHeight/2., ksensWidth/2. };
 601      Float_t theight = 2*khFrameHeight + ksensHeight;
 602      Float_t hFramepar[3]={khFrameLength/2., theight/2., khFrameWidth/2.};
 603      Float_t bFramepar[3]={kbFrameLength/2., kbFrameHeight/2., kbFrameWidth/2.};
 604      Float_t vFramepar[3]={kvFrameLength/2., kvFrameHeight/2., kvFrameWidth/2.};
 605      Float_t nulocpar[3]={knulocLength/2., knulocHeight/2., knulocWidth/2.};
 606      Float_t xx;
 607      Float_t xxmax = (kbFrameLength - knulocLength)/2.;
 608      Int_t index=0;
 609
 610      if (fStations[2]) {
 611
 612 //********************************************************************
 613 //                            Station 3                             **
 614 //********************************************************************
 615      // indices 1 and 2 for first and second chambers in the station
 616      // iChamber (first chamber) kept for other quanties than Z,
 617      // assumed to be the same in both chambers
 618      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[4];
 619      iChamber2 =(AliMUONChamber*) (*fChambers)[5];
 620      zpos1=iChamber1->Z();
 621      zpos2=iChamber2->Z();
 622      dstation = TMath::Abs(zpos2 - zpos1);
 623
 624 //
 625 //   Mother volume
 626      tpar[0] = iChamber->RInner()-dframep;
 627      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 628      tpar[2] = dstation/5;
 629
 630      const char *slats5Mother = "S05M";
 631      const char *slats6Mother = "S06M";
 632      Float_t zoffs5 = 0;
 633      Float_t zoffs6 = 0;
 634
 635      if (gAlice->GetModule("DIPO")) {
 636        slats5Mother="DDIP";
 637        slats6Mother="DDIP";
 638
 639        zoffs5 = TMath::Abs(zpos1);
 640        zoffs6 = TMath::Abs(zpos2);
 641      }
 642
 643      else {
 644        gMC->Gsvolu("S05M", "TUBE", idAir, tpar, 3);
 645        gMC->Gsvolu("S06M", "TUBE", idAir, tpar, 3);
 646        gMC->Gspos("S05M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 647        gMC->Gspos("S06M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 648      }
 649
 650      // volumes for slat geometry (xx=5,..,10 chamber id):
 651      // Sxx0 Sxx1 Sxx2 Sxx3  -->   Slat Mother volumes
 652      // SxxG                          -->   Sensitive volume (gas)
 653      // SxxP                          -->   PCB (copper)
 654      // SxxI                          -->   Insulator (vetronite)
 655      // SxxC                          -->   Carbon panel
 656      // SxxR                          -->   Rohacell
 657      // SxxH, SxxV                    -->   Horizontal and Vertical frames (vetronite)
 658      // SB5x                          -->   Volumes for the 35 cm long PCB
 659      // slat dimensions: slat is a MOTHER volume!!! made of air
 660
 661      // only for chamber 5: slat 1 has a PCB shorter by 5cm!
 662
 663      Float_t tlength = 35.;
 664      Float_t panelpar2[3]  = { tlength/2., panelpar[1],  panelpar[2]};
 665      Float_t rohapar2[3]   = { tlength/2., rohapar[1],   rohapar[2]};
 666      Float_t insupar2[3]   = { tlength/2., insupar[1],   insupar[2]};
 667      Float_t pcbpar2[3]    = { tlength/2., pcbpar[1],    pcbpar[2]};
 668      Float_t senspar2[3]   = { tlength/2., senspar[1],   senspar[2]};
 669      Float_t hFramepar2[3] = { tlength/2., hFramepar[1], hFramepar[2]};
 670      Float_t bFramepar2[3] = { tlength/2., bFramepar[1], bFramepar[2]};
 671
 672      const Int_t knSlats3 = 5;  // number of slats per quadrant
 673      const Int_t knPCB3[knSlats3] = {3,3,4,3,2}; // n PCB per slat
 674      const Float_t kxpos3[knSlats3] = {31., 40., 0., 0., 0.};
 675      Float_t slatLength3[knSlats3];
 676
 677      // create and position the slat (mother) volumes
 678
 679      char volNam5[5];
 680      char volNam6[5];
 681      Float_t xSlat3;
 682
 683      Float_t spar2[3];
 684      for (i = 0; i<knSlats3; i++){
 685        slatLength3[i] = kpcbLength * knPCB3[i] + 2. * kdSlatLength;
 686        xSlat3 = slatLength3[i]/2. - kvFrameLength/2. + kxpos3[i];
 687        if (i==1 || i==0) slatLength3[i] -=  2. *kdSlatLength; // frame out in PCB with circular border
 688        Float_t ySlat31 =  ksensHeight * i - kyOverlap * i;
 689        Float_t ySlat32 = -ksensHeight * i + kyOverlap * i;
 690        spar[0] = slatLength3[i]/2.;
 691        spar[1] = kslatHeight/2.;
 692        spar[2] = kslatWidth/2. * 1.01;
 693        // take away 5 cm from the first slat in chamber 5
 694        Float_t xSlat32 = 0;
 695        if (i==1 || i==2) { // 1 pcb is shortened by 5cm
 696          spar2[0] = spar[0]-5./2.;
 697          xSlat32 = xSlat3 - 5/2.;
 698        }
 699        else {
 700          spar2[0] = spar[0];
 701          xSlat32 = xSlat3;
 702        }
 703        spar2[1] = spar[1];
 704        spar2[2] = spar[2];
 705        Float_t dzCh3=spar[2] * 1.01;
 706        // zSlat to be checked (odd downstream or upstream?)
 707        Float_t zSlat = (i%2 ==0)? -spar[2] : spar[2];
 708
 709         if (gAlice->GetModule("DIPO")) {zSlat*=-1.;}
 710
 711        sprintf(volNam5,"S05%d",i);
 712        gMC->Gsvolu(volNam5,"BOX",kslatMaterial,spar2,3);
 713        gMC->Gspos(volNam5, i*4+1,slats5Mother, -xSlat32, ySlat31, zoffs5-zSlat-2.*dzCh3, 0, "ONLY");
 714        gMC->Gspos(volNam5, i*4+2,slats5Mother, +xSlat32, ySlat31, zoffs5-zSlat+2.*dzCh3, 0, "ONLY");
 715
 716         if (i>0) {
 717          gMC->Gspos(volNam5, i*4+3,slats5Mother,-xSlat32, ySlat32, zoffs5-zSlat-2.*dzCh3, 0, "ONLY");
 718          gMC->Gspos(volNam5, i*4+4,slats5Mother,+xSlat32, ySlat32, zoffs5-zSlat+2.*dzCh3, 0, "ONLY");
 719        }
 720        sprintf(volNam6,"S06%d",i);
 721        gMC->Gsvolu(volNam6,"BOX",kslatMaterial,spar,3);
 722        gMC->Gspos(volNam6, i*4+1,slats6Mother,-xSlat3, ySlat31, zoffs6-zSlat-2.*dzCh3, 0, "ONLY");
 723        gMC->Gspos(volNam6, i*4+2,slats6Mother,+xSlat3, ySlat31, zoffs6-zSlat+2.*dzCh3, 0, "ONLY");
 724        if (i>0) {
 725          gMC->Gspos(volNam6, i*4+3,slats6Mother,-xSlat3, ySlat32, zoffs6-zSlat-2.*dzCh3, 0, "ONLY");
 726          gMC->Gspos(volNam6, i*4+4,slats6Mother,+xSlat3, ySlat32, zoffs6-zSlat+2.*dzCh3, 0, "ONLY");
 727        }
 728      }
 729
 730      // create the panel volume
 731
 732      gMC->Gsvolu("S05C","BOX",kpanelMaterial,panelpar,3);
 733      gMC->Gsvolu("SB5C","BOX",kpanelMaterial,panelpar2,3);
 734      gMC->Gsvolu("S06C","BOX",kpanelMaterial,panelpar,3);
 735
 736      // create the rohacell volume
 737
 738      gMC->Gsvolu("S05R","BOX",krohaMaterial,rohapar,3);
 739      gMC->Gsvolu("SB5R","BOX",krohaMaterial,rohapar2,3);
 740      gMC->Gsvolu("S06R","BOX",krohaMaterial,rohapar,3);
 741
 742      // create the insulating material volume
 743
 744      gMC->Gsvolu("S05I","BOX",kinsuMaterial,insupar,3);
 745      gMC->Gsvolu("SB5I","BOX",kinsuMaterial,insupar2,3);
 746      gMC->Gsvolu("S06I","BOX",kinsuMaterial,insupar,3);
 747
 748      // create the PCB volume
 749
 750      gMC->Gsvolu("S05P","BOX",kpcbMaterial,pcbpar,3);
 751      gMC->Gsvolu("SB5P","BOX",kpcbMaterial,pcbpar2,3);
 752      gMC->Gsvolu("S06P","BOX",kpcbMaterial,pcbpar,3);
 753
 754      // create the sensitive volumes,
 755      gMC->Gsvolu("S05G","BOX",ksensMaterial,dum,0);
 756      gMC->Gsvolu("S06G","BOX",ksensMaterial,dum,0);
 757
 758
 759      // create the vertical frame volume
 760
 761      gMC->Gsvolu("S05V","BOX",kvFrameMaterial,vFramepar,3);
 762      gMC->Gsvolu("S06V","BOX",kvFrameMaterial,vFramepar,3);
 763
 764      // create the horizontal frame volume
 765
 766      gMC->Gsvolu("S05H","BOX",khFrameMaterial,hFramepar,3);
 767      gMC->Gsvolu("SB5H","BOX",khFrameMaterial,hFramepar2,3);
 768      gMC->Gsvolu("S06H","BOX",khFrameMaterial,hFramepar,3);
 769
 770      // create the horizontal border volume
 771
 772      gMC->Gsvolu("S05B","BOX",kbFrameMaterial,bFramepar,3);
 773      gMC->Gsvolu("SB5B","BOX",kbFrameMaterial,bFramepar2,3);
 774      gMC->Gsvolu("S06B","BOX",kbFrameMaterial,bFramepar,3);
 775
 776      index=0;
 777      for (i = 0; i<knSlats3; i++){
 778        sprintf(volNam5,"S05%d",i);
 779        sprintf(volNam6,"S06%d",i);
 780        Float_t xvFrame  = (slatLength3[i] - kvFrameLength)/2.;
 781        Float_t xvFrame2  = xvFrame;
 782        if ( i==1 || i ==2 ) xvFrame2 -= 5./2.;
 783        // position the vertical frames
 784        if (i!=1 && i!=0) {
 785          gMC->Gspos("S05V",2*i-1,volNam5, xvFrame2, 0., 0. , 0, "ONLY");
 786          gMC->Gspos("S05V",2*i  ,volNam5,-xvFrame2, 0., 0. , 0, "ONLY");
 787          gMC->Gspos("S06V",2*i-1,volNam6, xvFrame, 0., 0. , 0, "ONLY");
 788          gMC->Gspos("S06V",2*i  ,volNam6,-xvFrame, 0., 0. , 0, "ONLY");
 789        }
 790        // position the panels and the insulating material
 791        for (j=0; j<knPCB3[i]; j++){
 792          index++;
 793          Float_t xx = ksensLength * (-knPCB3[i]/2.+j+.5);
 794          Float_t xx2 = xx + 5/2.;
 795
 796          Float_t zPanel = spar[2] - panelpar[2];
 797          if ( (i==1 || i==2) && j == knPCB3[i]-1) { // 1 pcb is shortened by 5cm
 798            gMC->Gspos("SB5C",2*index-1,volNam5, xx, 0., zPanel , 0, "ONLY");
 799            gMC->Gspos("SB5C",2*index  ,volNam5, xx, 0.,-zPanel , 0, "ONLY");
 800            gMC->Gspos("SB5I",index    ,volNam5, xx, 0., 0      , 0, "ONLY");
 801          }
 802          else if ( (i==1 || i==2) && j < knPCB3[i]-1) {
 803            gMC->Gspos("S05C",2*index-1,volNam5, xx2, 0., zPanel , 0, "ONLY");
 804            gMC->Gspos("S05C",2*index  ,volNam5, xx2, 0.,-zPanel , 0, "ONLY");
 805            gMC->Gspos("S05I",index    ,volNam5, xx2, 0., 0 , 0, "ONLY");
 806          }
 807          else {
 808            gMC->Gspos("S05C",2*index-1,volNam5, xx, 0., zPanel , 0, "ONLY");
 809            gMC->Gspos("S05C",2*index  ,volNam5, xx, 0.,-zPanel , 0, "ONLY");
 810            gMC->Gspos("S05I",index    ,volNam5, xx, 0., 0 , 0, "ONLY");
 811          }
 812          gMC->Gspos("S06C",2*index-1,volNam6, xx, 0., zPanel , 0, "ONLY");
 813          gMC->Gspos("S06C",2*index  ,volNam6, xx, 0.,-zPanel , 0, "ONLY");
 814          gMC->Gspos("S06I",index,volNam6, xx, 0., 0 , 0, "ONLY");
 815        }
 816      }
 817
 818      // position the rohacell volume inside the panel volume
 819      gMC->Gspos("S05R",1,"S05C",0.,0.,0.,0,"ONLY");
 820      gMC->Gspos("SB5R",1,"SB5C",0.,0.,0.,0,"ONLY");
 821      gMC->Gspos("S06R",1,"S06C",0.,0.,0.,0,"ONLY");
 822
 823      // position the PCB volume inside the insulating material volume
 824      gMC->Gspos("S05P",1,"S05I",0.,0.,0.,0,"ONLY");
 825      gMC->Gspos("SB5P",1,"SB5I",0.,0.,0.,0,"ONLY");
 826      gMC->Gspos("S06P",1,"S06I",0.,0.,0.,0,"ONLY");
 827      // position the horizontal frame volume inside the PCB volume
 828      gMC->Gspos("S05H",1,"S05P",0.,0.,0.,0,"ONLY");
 829      gMC->Gspos("SB5H",1,"SB5P",0.,0.,0.,0,"ONLY");
 830      gMC->Gspos("S06H",1,"S06P",0.,0.,0.,0,"ONLY");
 831      // position the sensitive volume inside the horizontal frame volume
 832      gMC->Gsposp("S05G",1,"S05H",0.,0.,0.,0,"ONLY",senspar,3);
 833      gMC->Gsposp("S05G",1,"SB5H",0.,0.,0.,0,"ONLY",senspar2,3);
 834      gMC->Gsposp("S06G",1,"S06H",0.,0.,0.,0,"ONLY",senspar,3);
 835      // position the border volumes inside the PCB volume
 836      Float_t yborder = ( kpcbHeight - kbFrameHeight ) / 2.;
 837      gMC->Gspos("S05B",1,"S05P",0., yborder,0.,0,"ONLY");
 838      gMC->Gspos("S05B",2,"S05P",0.,-yborder,0.,0,"ONLY");
 839      gMC->Gspos("SB5B",1,"SB5P",0., yborder,0.,0,"ONLY");
 840      gMC->Gspos("SB5B",2,"SB5P",0.,-yborder,0.,0,"ONLY");
 841      gMC->Gspos("S06B",1,"S06P",0., yborder,0.,0,"ONLY");
 842      gMC->Gspos("S06B",2,"S06P",0.,-yborder,0.,0,"ONLY");
 843
 844      // create the NULOC volume and position it in the horizontal frame
 845
 846      gMC->Gsvolu("S05N","BOX",knulocMaterial,nulocpar,3);
 847      gMC->Gsvolu("S06N","BOX",knulocMaterial,nulocpar,3);
 848      index = 0;
 849      Float_t xxmax2 = xxmax - 5./2.;
 850      for (xx = -xxmax; xx<=xxmax; xx+=2*knulocLength) {
 851        index++;
 852        gMC->Gspos("S05N",2*index-1,"S05B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
 853        gMC->Gspos("S05N",2*index  ,"S05B", xx, 0., kbFrameWidth/4., 0, "ONLY");
 854        if (xx > -xxmax2 && xx< xxmax2) {
 855          gMC->Gspos("S05N",2*index-1,"SB5B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
 856          gMC->Gspos("S05N",2*index  ,"SB5B", xx, 0., kbFrameWidth/4., 0, "ONLY");
 857        }
 858        gMC->Gspos("S06N",2*index-1,"S06B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
 859        gMC->Gspos("S06N",2*index  ,"S06B", xx, 0., kbFrameWidth/4., 0, "ONLY");
 860      }
 861
 862      // position the volumes approximating the circular section of the pipe
 863      Float_t yoffs = ksensHeight/2. - kyOverlap;
 864      Float_t epsilon = 0.001;
 865      Int_t ndiv=6;
 866      Float_t divpar[3];
 867      Double_t dydiv= ksensHeight/ndiv;
 868      Double_t ydiv = yoffs -dydiv;
 869      Int_t imax=0;
 870      imax = 1;
 871      Float_t rmin = 33.;
 872      Float_t z1 = spar[2], z2=2*spar[2]*1.01;
 873      if (gAlice->GetModule("DIPO")) {z1*=-1.;}
 874      for (Int_t idiv=0;idiv<ndiv; idiv++){
 875        ydiv+= dydiv;
 876        Float_t xdiv = 0.;
 877        if (ydiv<rmin) xdiv= rmin * TMath::Sin( TMath::ACos(ydiv/rmin) );
 878        divpar[0] = (kpcbLength-xdiv)/2.;
 879        divpar[1] = dydiv/2. - epsilon;
 880        divpar[2] = ksensWidth/2.;
 881        Float_t xvol=(kpcbLength+xdiv)/2.+1.999;
 882        Float_t yvol=ydiv + dydiv/2.;
 883        //printf ("y ll = %f y ur = %f \n",yvol - divpar[1], yvol + divpar[1]);
 884        gMC->Gsposp("S05G",imax+4*idiv+1,slats5Mother,-xvol, yvol, zoffs5-z1-z2, 0, "ONLY",divpar,3);
 885        gMC->Gsposp("S06G",imax+4*idiv+1,slats6Mother,-xvol, yvol, zoffs6-z1-z2, 0, "ONLY",divpar,3);
 886        gMC->Gsposp("S05G",imax+4*idiv+2,slats5Mother,-xvol,-yvol, zoffs5-z1-z2, 0, "ONLY",divpar,3);
 887        gMC->Gsposp("S06G",imax+4*idiv+2,slats6Mother,-xvol,-yvol, zoffs6-z1-z2, 0, "ONLY",divpar,3);
 888        gMC->Gsposp("S05G",imax+4*idiv+3,slats5Mother,+xvol, yvol, zoffs5-z1+z2, 0, "ONLY",divpar,3);
 889        gMC->Gsposp("S06G",imax+4*idiv+3,slats6Mother,+xvol, yvol, zoffs6-z1+z2, 0, "ONLY",divpar,3);
 890        gMC->Gsposp("S05G",imax+4*idiv+4,slats5Mother,+xvol,-yvol, zoffs5-z1+z2, 0, "ONLY",divpar,3);
 891        gMC->Gsposp("S06G",imax+4*idiv+4,slats6Mother,+xvol,-yvol, zoffs6-z1+z2, 0, "ONLY",divpar,3);
 892      }
 893      }
 894
 895  if (fStations[3]) {
 896
 897 //********************************************************************
 898 //                            Station 4                             **
 899 //********************************************************************
 900      // indices 1 and 2 for first and second chambers in the station
 901      // iChamber (first chamber) kept for other quanties than Z,
 902      // assumed to be the same in both chambers
 903      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[6];
 904      iChamber2 =(AliMUONChamber*) (*fChambers)[7];
 905      zpos1=iChamber1->Z();
 906      zpos2=iChamber2->Z();
 907      dstation = TMath::Abs(zpos2 - zpos1);
 908 //      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2; // not used any more
 909
 910 //
 911 //   Mother volume
 912      tpar[0] = iChamber->RInner()-dframep;
 913      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 914      tpar[2] = dstation/4;
 915
 916      gMC->Gsvolu("S07M", "TUBE", idAir, tpar, 3);
 917      gMC->Gsvolu("S08M", "TUBE", idAir, tpar, 3);
 918      gMC->Gspos("S07M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 919      gMC->Gspos("S08M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 920
 921
 922      const Int_t knSlats4 = 6;  // number of slats per quadrant
 923      const Int_t knPCB4[knSlats4] = {4,4,5,5,4,3}; // n PCB per slat
 924      const Float_t kxpos4[knSlats4] = {38.5, 40., 0., 0., 0., 0.};
 925      Float_t slatLength4[knSlats4];
 926
 927      // create and position the slat (mother) volumes
 928
 929      char volNam7[5];
 930      char volNam8[5];
 931      Float_t xSlat4;
 932      Float_t ySlat4;
 933
 934      for (i = 0; i<knSlats4; i++){
 935        slatLength4[i] = kpcbLength * knPCB4[i] + 2. * kdSlatLength;
 936        xSlat4 = slatLength4[i]/2. - kvFrameLength/2. + kxpos4[i];
 937        if (i==1) slatLength4[i] -=  2. *kdSlatLength; // frame out in PCB with circular border
 938        ySlat4 =  ksensHeight * i - kyOverlap *i;
 939
 940        spar[0] = slatLength4[i]/2.;
 941        spar[1] = kslatHeight/2.;
 942        spar[2] = kslatWidth/2.*1.01;
 943        Float_t dzCh4=spar[2]*1.01;
 944        // zSlat to be checked (odd downstream or upstream?)
 945        Float_t zSlat = (i%2 ==0)? spar[2] : -spar[2];
 946        sprintf(volNam7,"S07%d",i);
 947        gMC->Gsvolu(volNam7,"BOX",kslatMaterial,spar,3);
 948        gMC->Gspos(volNam7, i*4+1,"S07M",-xSlat4, ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
 949        gMC->Gspos(volNam7, i*4+2,"S07M",+xSlat4, ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
 950        if (i>0) {
 951          gMC->Gspos(volNam7, i*4+3,"S07M",-xSlat4,-ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
 952          gMC->Gspos(volNam7, i*4+4,"S07M",+xSlat4,-ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
 953        }
 954        sprintf(volNam8,"S08%d",i);
 955        gMC->Gsvolu(volNam8,"BOX",kslatMaterial,spar,3);
 956        gMC->Gspos(volNam8, i*4+1,"S08M",-xSlat4, ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
 957        gMC->Gspos(volNam8, i*4+2,"S08M",+xSlat4, ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
 958        if (i>0) {
 959          gMC->Gspos(volNam8, i*4+3,"S08M",-xSlat4,-ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
 960          gMC->Gspos(volNam8, i*4+4,"S08M",+xSlat4,-ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
 961        }
 962      }
 963
 964
 965      // create the panel volume
 966
 967      gMC->Gsvolu("S07C","BOX",kpanelMaterial,panelpar,3);
 968      gMC->Gsvolu("S08C","BOX",kpanelMaterial,panelpar,3);
 969
 970      // create the rohacell volume
 971
 972      gMC->Gsvolu("S07R","BOX",krohaMaterial,rohapar,3);
 973      gMC->Gsvolu("S08R","BOX",krohaMaterial,rohapar,3);
 974
 975      // create the insulating material volume
 976
 977      gMC->Gsvolu("S07I","BOX",kinsuMaterial,insupar,3);
 978      gMC->Gsvolu("S08I","BOX",kinsuMaterial,insupar,3);
 979
 980      // create the PCB volume
 981
 982      gMC->Gsvolu("S07P","BOX",kpcbMaterial,pcbpar,3);
 983      gMC->Gsvolu("S08P","BOX",kpcbMaterial,pcbpar,3);
 984
 985      // create the sensitive volumes,
 986
 987      gMC->Gsvolu("S07G","BOX",ksensMaterial,dum,0);
 988      gMC->Gsvolu("S08G","BOX",ksensMaterial,dum,0);
 989
 990      // create the vertical frame volume
 991
 992      gMC->Gsvolu("S07V","BOX",kvFrameMaterial,vFramepar,3);
 993      gMC->Gsvolu("S08V","BOX",kvFrameMaterial,vFramepar,3);
 994
 995      // create the horizontal frame volume
 996
 997      gMC->Gsvolu("S07H","BOX",khFrameMaterial,hFramepar,3);
 998      gMC->Gsvolu("S08H","BOX",khFrameMaterial,hFramepar,3);
 999
1000      // create the horizontal border volume
1001
1002      gMC->Gsvolu("S07B","BOX",kbFrameMaterial,bFramepar,3);
1003      gMC->Gsvolu("S08B","BOX",kbFrameMaterial,bFramepar,3);
1004
1005      index=0;
1006      for (i = 0; i<knSlats4; i++){
1007        sprintf(volNam7,"S07%d",i);
1008        sprintf(volNam8,"S08%d",i);
1009        Float_t xvFrame  = (slatLength4[i] - kvFrameLength)/2.;
1010        // position the vertical frames
1011        if (i!=1 && i!=0) {
1012          gMC->Gspos("S07V",2*i-1,volNam7, xvFrame, 0., 0. , 0, "ONLY");
1013          gMC->Gspos("S07V",2*i  ,volNam7,-xvFrame, 0., 0. , 0, "ONLY");
1014          gMC->Gspos("S08V",2*i-1,volNam8, xvFrame, 0., 0. , 0, "ONLY");
1015          gMC->Gspos("S08V",2*i  ,volNam8,-xvFrame, 0., 0. , 0, "ONLY");
1016        }
1017        // position the panels and the insulating material
1018        for (j=0; j<knPCB4[i]; j++){
1019          index++;
1020          Float_t xx = ksensLength * (-knPCB4[i]/2.+j+.5);
1021
1022          Float_t zPanel = spar[2] - panelpar[2];
1023          gMC->Gspos("S07C",2*index-1,volNam7, xx, 0., zPanel , 0, "ONLY");
1024          gMC->Gspos("S07C",2*index  ,volNam7, xx, 0.,-zPanel , 0, "ONLY");
1025          gMC->Gspos("S08C",2*index-1,volNam8, xx, 0., zPanel , 0, "ONLY");
1026          gMC->Gspos("S08C",2*index  ,volNam8, xx, 0.,-zPanel , 0, "ONLY");
1027
1028          gMC->Gspos("S07I",index,volNam7, xx, 0., 0 , 0, "ONLY");
1029          gMC->Gspos("S08I",index,volNam8, xx, 0., 0 , 0, "ONLY");
1030        }
1031      }
1032
1033      // position the rohacell volume inside the panel volume
1034      gMC->Gspos("S07R",1,"S07C",0.,0.,0.,0,"ONLY");
1035      gMC->Gspos("S08R",1,"S08C",0.,0.,0.,0,"ONLY");
1036
1037      // position the PCB volume inside the insulating material volume
1038      gMC->Gspos("S07P",1,"S07I",0.,0.,0.,0,"ONLY");
1039      gMC->Gspos("S08P",1,"S08I",0.,0.,0.,0,"ONLY");
1040      // position the horizontal frame volume inside the PCB volume
1041      gMC->Gspos("S07H",1,"S07P",0.,0.,0.,0,"ONLY");
1042      gMC->Gspos("S08H",1,"S08P",0.,0.,0.,0,"ONLY");
1043      // position the sensitive volume inside the horizontal frame volume
1044      gMC->Gsposp("S07G",1,"S07H",0.,0.,0.,0,"ONLY",senspar,3);
1045      gMC->Gsposp("S08G",1,"S08H",0.,0.,0.,0,"ONLY",senspar,3);
1046      // position the border volumes inside the PCB volume
1047      Float_t yborder = ( kpcbHeight - kbFrameHeight ) / 2.;
1048      gMC->Gspos("S07B",1,"S07P",0., yborder,0.,0,"ONLY");
1049      gMC->Gspos("S07B",2,"S07P",0.,-yborder,0.,0,"ONLY");
1050      gMC->Gspos("S08B",1,"S08P",0., yborder,0.,0,"ONLY");
1051      gMC->Gspos("S08B",2,"S08P",0.,-yborder,0.,0,"ONLY");
1052
1053      // create the NULOC volume and position it in the horizontal frame
1054
1055      gMC->Gsvolu("S07N","BOX",knulocMaterial,nulocpar,3);
1056      gMC->Gsvolu("S08N","BOX",knulocMaterial,nulocpar,3);
1057      index = 0;
1058      for (xx = -xxmax; xx<=xxmax; xx+=2*knulocLength) {
1059        index++;
1060        gMC->Gspos("S07N",2*index-1,"S07B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
1061        gMC->Gspos("S07N",2*index  ,"S07B", xx, 0., kbFrameWidth/4., 0, "ONLY");
1062        gMC->Gspos("S08N",2*index-1,"S08B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
1063        gMC->Gspos("S08N",2*index  ,"S08B", xx, 0., kbFrameWidth/4., 0, "ONLY");
1064      }
1065
1066      // position the volumes approximating the circular section of the pipe
1067      Float_t yoffs = ksensHeight/2. - kyOverlap;
1068      Float_t epsilon = 0.001;
1069      Int_t ndiv=6;
1070      Float_t divpar[3];
1071      Double_t dydiv= ksensHeight/ndiv;
1072      Double_t ydiv = yoffs -dydiv;
1073      Int_t imax=0;
1074      imax = 1;
1075      Float_t rmin = 40.;
1076      Float_t z1 = -spar[2], z2=2*spar[2]*1.01;
1077      for (Int_t idiv=0;idiv<ndiv; idiv++){
1078        ydiv+= dydiv;
1079        Float_t xdiv = 0.;
1080        if (ydiv<rmin) xdiv= rmin * TMath::Sin( TMath::ACos(ydiv/rmin) );
1081        divpar[0] = (kpcbLength-xdiv)/2.;
1082        divpar[1] = dydiv/2. - epsilon;
1083        divpar[2] = ksensWidth/2.;
1084        Float_t xvol=(kpcbLength+xdiv)/2.+1.999;
1085        Float_t yvol=ydiv + dydiv/2.;
1086        gMC->Gsposp("S07G",imax+4*idiv+1,"S07M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
1087        gMC->Gsposp("S08G",imax+4*idiv+1,"S08M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
1088        gMC->Gsposp("S07G",imax+4*idiv+2,"S07M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
1089        gMC->Gsposp("S08G",imax+4*idiv+2,"S08M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
1090        gMC->Gsposp("S07G",imax+4*idiv+3,"S07M", xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
1091        gMC->Gsposp("S08G",imax+4*idiv+3,"S08M", xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
1092        gMC->Gsposp("S07G",imax+4*idiv+4,"S07M", xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
1093        gMC->Gsposp("S08G",imax+4*idiv+4,"S08M", xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
1094      }
1095
1096
1097
1098
1099
1100  }
1101
1102  if (fStations[4]) {
1103
1104
1105 //********************************************************************
1106 //                            Station 5                             **
1107 //********************************************************************
1108      // indices 1 and 2 for first and second chambers in the station
1109      // iChamber (first chamber) kept for other quanties than Z,
1110      // assumed to be the same in both chambers
1111      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[8];
1112      iChamber2 =(AliMUONChamber*) (*fChambers)[9];
1113      zpos1=iChamber1->Z();
1114      zpos2=iChamber2->Z();
1115      dstation = TMath::Abs(zpos2 - zpos1);
1116 //      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2; // not used any more
1117
1118 //
1119 //   Mother volume
1120      tpar[0] = iChamber->RInner()-dframep;
1121      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
1122      tpar[2] = dstation/5.;
1123
1124      gMC->Gsvolu("S09M", "TUBE", idAir, tpar, 3);
1125      gMC->Gsvolu("S10M", "TUBE", idAir, tpar, 3);
1126      gMC->Gspos("S09M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
1127      gMC->Gspos("S10M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
1128
1129
1130      const Int_t knSlats5 = 7;  // number of slats per quadrant
1131      const Int_t knPCB5[knSlats5] = {5,5,6,6,5,4,3}; // n PCB per slat
1132      const Float_t kxpos5[knSlats5] = {38.5, 40., 0., 0., 0., 0., 0.};
1133      Float_t slatLength5[knSlats5];
1134      char volNam9[5];
1135      char volNam10[5];
1136      Float_t xSlat5;
1137      Float_t ySlat5;
1138
1139      for (i = 0; i<knSlats5; i++){
1140        slatLength5[i] = kpcbLength * knPCB5[i] + 2. * kdSlatLength;
1141        xSlat5 = slatLength5[i]/2. - kvFrameLength/2. +kxpos5[i];
1142        if (i==1 || i==0) slatLength5[i] -=  2. *kdSlatLength; // frame out in PCB with circular border
1143        ySlat5 = ksensHeight * i - kyOverlap * i;
1144        spar[0] = slatLength5[i]/2.;
1145        spar[1] = kslatHeight/2.;
1146        spar[2] = kslatWidth/2. * 1.01;
1147        Float_t dzCh5=spar[2]*1.01;
1148        // zSlat to be checked (odd downstream or upstream?)
1149        Float_t zSlat = (i%2 ==0)? -spar[2] : spar[2];
1150        sprintf(volNam9,"S09%d",i);
1151        gMC->Gsvolu(volNam9,"BOX",kslatMaterial,spar,3);
1152        gMC->Gspos(volNam9, i*4+1,"S09M",-xSlat5, ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
1153        gMC->Gspos(volNam9, i*4+2,"S09M",+xSlat5, ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
1154        if (i>0) {
1155            gMC->Gspos(volNam9, i*4+3,"S09M",-xSlat5,-ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
1156            gMC->Gspos(volNam9, i*4+4,"S09M",+xSlat5,-ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
1157        }
1158        sprintf(volNam10,"S10%d",i);
1159        gMC->Gsvolu(volNam10,"BOX",kslatMaterial,spar,3);
1160        gMC->Gspos(volNam10, i*4+1,"S10M",-xSlat5, ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
1161        gMC->Gspos(volNam10, i*4+2,"S10M",+xSlat5, ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
1162        if (i>0) {
1163            gMC->Gspos(volNam10, i*4+3,"S10M",-xSlat5,-ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
1164            gMC->Gspos(volNam10, i*4+4,"S10M",+xSlat5,-ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
1165        }
1166      }
1167
1168      // create the panel volume
1169
1170      gMC->Gsvolu("S09C","BOX",kpanelMaterial,panelpar,3);
1171      gMC->Gsvolu("S10C","BOX",kpanelMaterial,panelpar,3);
1172
1173      // create the rohacell volume
1174
1175      gMC->Gsvolu("S09R","BOX",krohaMaterial,rohapar,3);
1176      gMC->Gsvolu("S10R","BOX",krohaMaterial,rohapar,3);
1177
1178      // create the insulating material volume
1179
1180      gMC->Gsvolu("S09I","BOX",kinsuMaterial,insupar,3);
1181      gMC->Gsvolu("S10I","BOX",kinsuMaterial,insupar,3);
1182
1183      // create the PCB volume
1184
1185      gMC->Gsvolu("S09P","BOX",kpcbMaterial,pcbpar,3);
1186      gMC->Gsvolu("S10P","BOX",kpcbMaterial,pcbpar,3);
1187
1188      // create the sensitive volumes,
1189
1190      gMC->Gsvolu("S09G","BOX",ksensMaterial,dum,0);
1191      gMC->Gsvolu("S10G","BOX",ksensMaterial,dum,0);
1192
1193      // create the vertical frame volume
1194
1195      gMC->Gsvolu("S09V","BOX",kvFrameMaterial,vFramepar,3);
1196      gMC->Gsvolu("S10V","BOX",kvFrameMaterial,vFramepar,3);
1197
1198      // create the horizontal frame volume
1199
1200      gMC->Gsvolu("S09H","BOX",khFrameMaterial,hFramepar,3);
1201      gMC->Gsvolu("S10H","BOX",khFrameMaterial,hFramepar,3);
1202
1203      // create the horizontal border volume
1204
1205      gMC->Gsvolu("S09B","BOX",kbFrameMaterial,bFramepar,3);
1206      gMC->Gsvolu("S10B","BOX",kbFrameMaterial,bFramepar,3);
1207
1208      index=0;
1209      for (i = 0; i<knSlats5; i++){
1210        sprintf(volNam9,"S09%d",i);
1211        sprintf(volNam10,"S10%d",i);
1212        Float_t xvFrame  = (slatLength5[i] - kvFrameLength)/2.;
1213        // position the vertical frames
1214        if (i!=1 && i!=0) {
1215          gMC->Gspos("S09V",2*i-1,volNam9, xvFrame, 0., 0. , 0, "ONLY");
1216          gMC->Gspos("S09V",2*i  ,volNam9,-xvFrame, 0., 0. , 0, "ONLY");
1217          gMC->Gspos("S10V",2*i-1,volNam10, xvFrame, 0., 0. , 0, "ONLY");
1218          gMC->Gspos("S10V",2*i  ,volNam10,-xvFrame, 0., 0. , 0, "ONLY");
1219        }
1220
1221        // position the panels and the insulating material
1222        for (j=0; j<knPCB5[i]; j++){
1223          index++;
1224          Float_t xx = ksensLength * (-knPCB5[i]/2.+j+.5);
1225
1226          Float_t zPanel = spar[2] - panelpar[2];
1227          gMC->Gspos("S09C",2*index-1,volNam9, xx, 0., zPanel , 0, "ONLY");
1228          gMC->Gspos("S09C",2*index  ,volNam9, xx, 0.,-zPanel , 0, "ONLY");
1229          gMC->Gspos("S10C",2*index-1,volNam10, xx, 0., zPanel , 0, "ONLY");
1230          gMC->Gspos("S10C",2*index  ,volNam10, xx, 0.,-zPanel , 0, "ONLY");
1231
1232          gMC->Gspos("S09I",index,volNam9, xx, 0., 0 , 0, "ONLY");
1233          gMC->Gspos("S10I",index,volNam10, xx, 0., 0 , 0, "ONLY");
1234        }
1235      }
1236
1237      // position the rohacell volume inside the panel volume
1238      gMC->Gspos("S09R",1,"S09C",0.,0.,0.,0,"ONLY");
1239      gMC->Gspos("S10R",1,"S10C",0.,0.,0.,0,"ONLY");
1240
1241      // position the PCB volume inside the insulating material volume
1242      gMC->Gspos("S09P",1,"S09I",0.,0.,0.,0,"ONLY");
1243      gMC->Gspos("S10P",1,"S10I",0.,0.,0.,0,"ONLY");
1244      // position the horizontal frame volume inside the PCB volume
1245      gMC->Gspos("S09H",1,"S09P",0.,0.,0.,0,"ONLY");
1246      gMC->Gspos("S10H",1,"S10P",0.,0.,0.,0,"ONLY");
1247      // position the sensitive volume inside the horizontal frame volume
1248      gMC->Gsposp("S09G",1,"S09H",0.,0.,0.,0,"ONLY",senspar,3);
1249      gMC->Gsposp("S10G",1,"S10H",0.,0.,0.,0,"ONLY",senspar,3);
1250      // position the border volumes inside the PCB volume
1251      Float_t yborder = ( kpcbHeight - kbFrameHeight ) / 2.;
1252      gMC->Gspos("S09B",1,"S09P",0., yborder,0.,0,"ONLY");
1253      gMC->Gspos("S09B",2,"S09P",0.,-yborder,0.,0,"ONLY");
1254      gMC->Gspos("S10B",1,"S10P",0., yborder,0.,0,"ONLY");
1255      gMC->Gspos("S10B",2,"S10P",0.,-yborder,0.,0,"ONLY");
1256
1257      // create the NULOC volume and position it in the horizontal frame
1258
1259      gMC->Gsvolu("S09N","BOX",knulocMaterial,nulocpar,3);
1260      gMC->Gsvolu("S10N","BOX",knulocMaterial,nulocpar,3);
1261      index = 0;
1262      for (xx = -xxmax; xx<=xxmax; xx+=2*knulocLength) {
1263        index++;
1264        gMC->Gspos("S09N",2*index-1,"S09B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
1265        gMC->Gspos("S09N",2*index  ,"S09B", xx, 0., kbFrameWidth/4., 0, "ONLY");
1266        gMC->Gspos("S10N",2*index-1,"S10B", xx, 0.,-kbFrameWidth/4., 0, "ONLY");
1267        gMC->Gspos("S10N",2*index  ,"S10B", xx, 0., kbFrameWidth/4., 0, "ONLY");
1268      }
1269      // position the volumes approximating the circular section of the pipe
1270      Float_t yoffs = ksensHeight/2. - kyOverlap;
1271      Float_t epsilon = 0.001;
1272      Int_t ndiv=6;
1273      Float_t divpar[3];
1274      Double_t dydiv= ksensHeight/ndiv;
1275      Double_t ydiv = yoffs -dydiv;
1276      Int_t imax=0;
1277      //     for (Int_t islat=0; islat<knSlats3; islat++) imax += knPCB3[islat];
1278      imax = 1;
1279      Float_t rmin = 40.;
1280      Float_t z1 = spar[2], z2=2*spar[2]*1.01;
1281      for (Int_t idiv=0;idiv<ndiv; idiv++){
1282        ydiv+= dydiv;
1283        Float_t xdiv = 0.;
1284        if (ydiv<rmin) xdiv= rmin * TMath::Sin( TMath::ACos(ydiv/rmin) );
1285        divpar[0] = (kpcbLength-xdiv)/2.;
1286        divpar[1] = dydiv/2. - epsilon;
1287        divpar[2] = ksensWidth/2.;
1288        Float_t xvol=(kpcbLength+xdiv)/2. + 1.999;
1289        Float_t yvol=ydiv + dydiv/2.;
1290        gMC->Gsposp("S09G",imax+4*idiv+1,"S09M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
1291        gMC->Gsposp("S10G",imax+4*idiv+1,"S10M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
1292        gMC->Gsposp("S09G",imax+4*idiv+2,"S09M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
1293        gMC->Gsposp("S10G",imax+4*idiv+2,"S10M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
1294        gMC->Gsposp("S09G",imax+4*idiv+3,"S09M", +xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
1295        gMC->Gsposp("S10G",imax+4*idiv+3,"S10M", +xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
1296        gMC->Gsposp("S09G",imax+4*idiv+4,"S09M", +xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
1297        gMC->Gsposp("S10G",imax+4*idiv+4,"S10M", +xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
1298      }
1299
1300  }
1301
1302 //********************************************************************
1303 //                            Trigger                               **
1304 //********************************************************************
1305  /*
1306     zpos1 and zpos2 are the middle of the first and second
1307     planes of station 1 (+1m for second station):
1308     zpos1=(zpos1m+zpos1p)/2=(15999+16071)/2=16035 mm, thick/2=40 mm
1309     zpos2=(zpos2m+zpos2p)/2=(16169+16241)/2=16205 mm, thick/2=40 mm
1310     zposxm and zposxp= middles of gaz gaps within a detection plane
1311     rem: the total thickness accounts for 1 mm of al on both
1312     side of the RPCs (see zpos1 and zpos2)
1313  */
1314
1315 // vertical gap between right and left chambers (kDXZERO*2=4cm)
1316  const Float_t kDXZERO=2.;
1317 // main distances for chamber definition in first plane/first station
1318  const Float_t kXMIN=34.;
1319  const Float_t kXMED=51.;
1320  const Float_t kXMAX=272.;
1321 // kXMAX will become 255. in real life. segmentation to be updated accordingly
1322 // (see fig.2-4 & 2-5 of Local Trigger Board PRR)
1323  const Float_t kYMIN=34.;
1324  const Float_t kYMAX=51.;
1325 // inner/outer radius of flange between beam shield. and chambers (1/station)
1326  const Float_t kRMIN[2]={50.,50.};
1327  const Float_t kRMAX[2]={64.,68.};
1328 // z position of the middle of the gas gap in mother vol
1329  const Float_t kZm=-3.6;
1330  const Float_t kZp=+3.6;
1331
1332  iChamber1 = (AliMUONChamber*) (*fChambers)[10];
1333  zpos1 = iChamber1->Z();
1334
1335 // ratio of zpos1m/zpos1p and inverse for first plane
1336  Float_t zmp=(zpos1+3.6)/(zpos1-3.6);
1337  Float_t zpm=1./zmp;
1338
1339  Int_t icount=0; // chamber counter (0 1 2 3)
1340
1341  for (Int_t istation=0; istation<2; istation++) { // loop on stations
1342      for (Int_t iplane=0; iplane<2; iplane++) {   // loop on detection planes
1343
1344          Int_t iVolNum=1; // counter Volume Number
1345          icount = Int_t(iplane*TMath::Power(2,0))+
1346              Int_t(istation*TMath::Power(2,1));
1347
1348          char volPlane[5];
1349          sprintf(volPlane,"SM%d%d",istation+1,iplane+1);
1350
1351          iChamber = (AliMUONChamber*) (*fChambers)[10+icount];
1352          Float_t zpos = iChamber->Z();
1353
1354 // mother volume
1355          tpar[0] = iChamber->RInner();
1356          tpar[1] = iChamber->ROuter();
1357          tpar[2] = 4.0;
1358          gMC->Gsvolu(volPlane,"TUBE",idAir,tpar,3);
1359
1360 // Flange between beam shielding and RPC
1361          tpar[0]= kRMIN[istation];
1362          tpar[1]= kRMAX[istation];
1363          tpar[2]= 4.0;
1364
1365          char volFlange[5];
1366          sprintf(volFlange,"SF%dA",icount+1);
1367          gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     //Al
1368          gMC->Gspos(volFlange,1,volPlane,0.,0.,0.,0,"MANY");
1369
1370 // scaling factor
1371          Float_t zRatio = zpos / zpos1;
1372
1373 // chamber prototype
1374          tpar[0]= 0.;
1375          tpar[1]= 0.;
1376          tpar[2]= 0.;
1377
1378          char volAlu[5]; // Alu
1379          char volBak[5]; // Bakelite
1380          char volGaz[5]; // Gas streamer
1381
1382          sprintf(volAlu,"SC%dA",icount+1);
1383          sprintf(volBak,"SB%dA",icount+1);
1384          sprintf(volGaz,"SG%dA",icount+1);
1385
1386          gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);           // Al
1387          gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);     // Bakelite
1388          gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);     // Gas streamer
1389
1390 // chamber type A
1391          tpar[0] = -1.;
1392          tpar[1] = -1.;
1393
1394          Float_t xA=(kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
1395          Float_t yAm=0.;
1396          Float_t yAp=0.;
1397
1398          tpar[2] = 0.1;
1399          gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
1400          tpar[2] = 0.3;
1401          gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
1402
1403          tpar[2] = 0.4;
1404          tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
1405          tpar[1] = kYMIN*zRatio;
1406
1407          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xA,yAm,-kZm,0,"ONLY",tpar,3);
1408          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xA,yAp,-kZp,0,"ONLY",tpar,3);
1409          gMC->Gsbool(volAlu,volFlange);
1410
1411 // chamber type B
1412          Float_t tpar1save=tpar[1];
1413          Float_t y1msave=yAm;
1414          Float_t y1psave=yAp;
1415
1416          tpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
1417          tpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
1418
1419          Float_t xB=(kDXZERO+kXMIN)*zRatio+tpar[0];
1420          Float_t yBp=(y1msave+tpar1save)*zpm+tpar[1];
1421          Float_t yBm=(y1psave+tpar1save)*zmp+tpar[1];
1422
1423          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xB, yBp,-kZp,0,"ONLY",tpar,3);
1424          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xB, yBm,-kZm,0,"ONLY",tpar,3);
1425          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xB,-yBp,-kZp,0,"ONLY",tpar,3);
1426          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xB,-yBm,-kZm,0,"ONLY",tpar,3);
1427
1428 // chamber type C (note : same Z than type B)
1429          tpar1save=tpar[1];
1430          y1msave=yBm;
1431          y1psave=yBp;
1432
1433          tpar[0] = (kXMAX/2)*zRatio;
1434          tpar[1] = (kYMAX/2)*zRatio;
1435
1436          Float_t xC=kDXZERO*zRatio+tpar[0];
1437          Float_t yCp=(y1psave+tpar1save)*1.+tpar[1];
1438          Float_t yCm=(y1msave+tpar1save)*1.+tpar[1];
1439
1440          gMC->Gsposp(volAlu,iVolNum++,volPlane,-xC, yCp,-kZp,0,"ONLY",tpar,3);
1441          gMC->Gsposp(volAlu,iVolNum++,volPlane, xC, yCm,-kZm,0,"ONLY",tpar,3);
1442          gMC->Gsposp(volAlu,iVolNum++,volPlane,-xC,-yCp,-kZp,0,"ONLY",tpar,3);
1443          gMC->Gsposp(volAlu,iVolNum++,volPlane, xC,-yCm,-kZm,0,"ONLY",tpar,3);
1444
1445 // chamber type D, E and F (same size)
1446          tpar1save=tpar[1];
1447          y1msave=yCm;
1448          y1psave=yCp;
1449
1450          tpar[0] = (kXMAX/2.)*zRatio;
1451          tpar[1] =  kYMIN*zRatio;
1452
1453          Float_t xD=kDXZERO*zRatio+tpar[0];
1454          Float_t yDp=(y1msave+tpar1save)*zpm+tpar[1];
1455          Float_t yDm=(y1psave+tpar1save)*zmp+tpar[1];
1456
1457          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD, yDm,-kZm,0,"ONLY",tpar,3);
1458          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD, yDp,-kZp,0,"ONLY",tpar,3);
1459          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD,-yDm,-kZm,0,"ONLY",tpar,3);
1460          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD,-yDp,-kZp,0,"ONLY",tpar,3);
1461
1462          tpar1save=tpar[1];
1463          y1msave=yDm;
1464          y1psave=yDp;
1465          Float_t yEp=(y1msave+tpar1save)*zpm+tpar[1];
1466          Float_t yEm=(y1psave+tpar1save)*zmp+tpar[1];
1467
1468          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD, yEp,-kZp,0,"ONLY",tpar,3);
1469          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD, yEm,-kZm,0,"ONLY",tpar,3);
1470          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD,-yEp,-kZp,0,"ONLY",tpar,3);
1471          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD,-yEm,-kZm,0,"ONLY",tpar,3);
1472
1473          tpar1save=tpar[1];
1474          y1msave=yEm;
1475          y1psave=yEp;
1476          Float_t yFp=(y1msave+tpar1save)*zpm+tpar[1];
1477          Float_t yFm=(y1psave+tpar1save)*zmp+tpar[1];
1478
1479          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD, yFm,-kZm,0,"ONLY",tpar,3);
1480          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD, yFp,-kZp,0,"ONLY",tpar,3);
1481          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD,-yFm,-kZm,0,"ONLY",tpar,3);
1482          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD,-yFp,-kZp,0,"ONLY",tpar,3);
1483
1484 // Positioning plane in ALICE
1485          gMC->Gspos(volPlane,1,"ALIC",0.,0.,zpos,0,"ONLY");
1486
1487      } // end loop on detection planes
1488  } // end loop on stations
1489
1490 }
1491
1492
1493 //___________________________________________
1494 void AliMUONv3::CreateMaterials()
1495 {
1496   // *** DEFINITION OF AVAILABLE MUON MATERIALS ***
1497   //
1498   //     Ar-CO2 gas (80%+20%)
1499     Float_t ag1[3]   = { 39.95,12.01,16. };
1500     Float_t zg1[3]   = { 18.,6.,8. };
1501     Float_t wg1[3]   = { .8,.0667,.13333 };
1502     Float_t dg1      = .001821;
1503     //
1504     //     Ar-buthane-freon gas -- trigger chambers
1505     Float_t atr1[4]  = { 39.95,12.01,1.01,19. };
1506     Float_t ztr1[4]  = { 18.,6.,1.,9. };
1507     Float_t wtr1[4]  = { .56,.1262857,.2857143,.028 };
1508     Float_t dtr1     = .002599;
1509     //
1510     //     Ar-CO2 gas
1511     Float_t agas[3]  = { 39.95,12.01,16. };
1512     Float_t zgas[3]  = { 18.,6.,8. };
1513     Float_t wgas[3]  = { .74,.086684,.173316 };
1514     Float_t dgas     = .0018327;
1515     //
1516     //     Ar-Isobutane gas (80%+20%) -- tracking
1517     Float_t ag[3]    = { 39.95,12.01,1.01 };
1518     Float_t zg[3]    = { 18.,6.,1. };
1519     Float_t wg[3]    = { .8,.057,.143 };
1520     Float_t dg       = .0019596;
1521     //
1522     //     Ar-Isobutane-Forane-SF6 gas (49%+7%+40%+4%) -- trigger
1523     Float_t atrig[5] = { 39.95,12.01,1.01,19.,32.066 };
1524     Float_t ztrig[5] = { 18.,6.,1.,9.,16. };
1525     Float_t wtrig[5] = { .49,1.08,1.5,1.84,0.04 };
1526     Float_t dtrig    = .0031463;
1527     //
1528     //     bakelite
1529
1530     Float_t abak[3] = {12.01 , 1.01 , 16.};
1531     Float_t zbak[3] = {6.     , 1.   , 8.};
1532     Float_t wbak[3] = {6.     , 6.   , 1.};
1533     Float_t dbak = 1.4;
1534
1535     Float_t epsil, stmin, deemax, tmaxfd, stemax;
1536
1537     Int_t iSXFLD   = gAlice->Field()->Integ();
1538     Float_t sXMGMX = gAlice->Field()->Max();
1539     //
1540     // --- Define the various materials for GEANT ---
1541     AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
1542     AliMaterial(10, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
1543     // Air
1544     Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
1545     Float_t zAir[4]={6.,7.,8.,18.};
1546     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
1547     Float_t dAir = 1.20479E-3;
1548     AliMixture(15, "AIR$      ", aAir,  zAir, dAir,4, wAir);
1549     //    AliMaterial(15, "AIR$      ", 14.61, 7.3, .001205, 30423.24, 67500);
1550     AliMixture(19, "Bakelite$", abak, zbak, dbak, -3, wbak);
1551     AliMixture(20, "ArC4H10 GAS$", ag, zg, dg, 3, wg);
1552     AliMixture(21, "TRIG GAS$", atrig, ztrig, dtrig, -5, wtrig);
1553     AliMixture(22, "ArCO2 80%$", ag1, zg1, dg1, 3, wg1);
1554     AliMixture(23, "Ar-freon $", atr1, ztr1, dtr1, 4, wtr1);
1555     AliMixture(24, "ArCO2 GAS$", agas, zgas, dgas, 3, wgas);
1556     // materials for slat:
1557     //     Sensitive area: gas (already defined)
1558     //     PCB: copper
1559     //     insulating material and frame: vetronite
1560     //     walls: carbon, rohacell, carbon
1561   Float_t aglass[5]={12.01, 28.09, 16.,   10.8,  23.};
1562   Float_t zglass[5]={ 6.,   14.,    8.,    5.,   11.};
1563   Float_t wglass[5]={ 0.5,  0.105, 0.355, 0.03,  0.01};
1564   Float_t dglass=1.74;
1565
1566   // rohacell: C9 H13 N1 O2
1567   Float_t arohac[4] = {12.01,  1.01, 14.010, 16.};
1568   Float_t zrohac[4] = { 6.,    1.,    7.,     8.};
1569   Float_t wrohac[4] = { 9.,   13.,    1.,     2.};
1570   Float_t drohac    = 0.03;
1571
1572   AliMaterial(31, "COPPER$",   63.54,    29.,   8.96,  1.4, 0.);
1573   AliMixture(32, "Vetronite$",aglass, zglass, dglass,    5, wglass);
1574   AliMaterial(33, "Carbon$",   12.01,     6.,  2.265, 18.8, 49.9);
1575   AliMixture(34, "Rohacell$", arohac, zrohac, drohac,   -4, wrohac);
1576
1577
1578     epsil  = .001; // Tracking precision,
1579     stemax = -1.;  // Maximum displacement for multiple scat
1580     tmaxfd = -20.; // Maximum angle due to field deflection
1581     deemax = -.3;  // Maximum fractional energy loss, DLS
1582     stmin  = -.8;
1583     //
1584     //    Air
1585     AliMedium(1, "AIR_CH_US         ", 15, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
1586     //
1587     //    Aluminum
1588
1589     AliMedium(4, "ALU_CH_US          ", 9, 0, iSXFLD, sXMGMX, tmaxfd, fMaxStepAlu,
1590             fMaxDestepAlu, epsil, stmin);
1591     AliMedium(5, "ALU_CH_US          ", 10, 0, iSXFLD, sXMGMX, tmaxfd, fMaxStepAlu,
1592             fMaxDestepAlu, epsil, stmin);
1593     //
1594     //    Ar-isoC4H10 gas
1595
1596     AliMedium(6, "AR_CH_US          ", 20, 1, iSXFLD, sXMGMX, tmaxfd, fMaxStepGas,
1597             fMaxDestepGas, epsil, stmin);
1598 //
1599     //    Ar-Isobuthane-Forane-SF6 gas
1600
1601     AliMedium(7, "GAS_CH_TRIGGER    ", 21, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
1602
1603     AliMedium(8, "BAKE_CH_TRIGGER   ", 19, 0, iSXFLD, sXMGMX, tmaxfd, fMaxStepAlu,
1604             fMaxDestepAlu, epsil, stmin);
1605
1606     AliMedium(9, "ARG_CO2   ", 22, 1, iSXFLD, sXMGMX, tmaxfd, fMaxStepGas,
1607             fMaxDestepAlu, epsil, stmin);
1608     // tracking media for slats: check the parameters!!
1609     AliMedium(11, "PCB_COPPER        ", 31, 0, iSXFLD, sXMGMX, tmaxfd,
1610               fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1611     AliMedium(12, "VETRONITE         ", 32, 0, iSXFLD, sXMGMX, tmaxfd,
1612               fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1613     AliMedium(13, "CARBON            ", 33, 0, iSXFLD, sXMGMX, tmaxfd,
1614               fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1615     AliMedium(14, "Rohacell          ", 34, 0, iSXFLD, sXMGMX, tmaxfd,
1616               fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1617 }
1618
1619 //___________________________________________
1620
1621 void AliMUONv3::Init()
1622 {
1623    //
1624    // Initialize Tracking Chambers
1625    //
1626
1627    AliDebug(0,"Start Init for version 1 - CPC chamber type");
1628    Int_t i;
1629    for (i=0; i<AliMUONConstants::NCh(); i++) {
1630        ( (AliMUONChamber*) (*fChambers)[i])->Init();
1631    }
1632
1633    //
1634    // Set the chamber (sensitive region) GEANT identifier
1635    ((AliMUONChamber*)(*fChambers)[0])->GetGeometry()->SetSensitiveVolume("S01G");
1636    ((AliMUONChamber*)(*fChambers)[1])->GetGeometry()->SetSensitiveVolume("S02G");
1637
1638    ((AliMUONChamber*)(*fChambers)[2])->GetGeometry()->SetSensitiveVolume("S03G");
1639    ((AliMUONChamber*)(*fChambers)[3])->GetGeometry()->SetSensitiveVolume("S04G");
1640
1641    ((AliMUONChamber*)(*fChambers)[4])->GetGeometry()->SetSensitiveVolume("S05G");
1642    ((AliMUONChamber*)(*fChambers)[5])->GetGeometry()->SetSensitiveVolume("S06G");
1643
1644    ((AliMUONChamber*)(*fChambers)[6])->GetGeometry()->SetSensitiveVolume("S07G");
1645    ((AliMUONChamber*)(*fChambers)[7])->GetGeometry()->SetSensitiveVolume("S08G");
1646
1647    ((AliMUONChamber*)(*fChambers)[8])->GetGeometry()->SetSensitiveVolume("S09G");
1648    ((AliMUONChamber*)(*fChambers)[9])->GetGeometry()->SetSensitiveVolume("S10G");
1649
1650    ((AliMUONChamber*)(*fChambers)[10])->GetGeometry()->SetSensitiveVolume("SG1A");
1651    ((AliMUONChamber*)(*fChambers)[11])->GetGeometry()->SetSensitiveVolume("SG2A");
1652    ((AliMUONChamber*)(*fChambers)[12])->GetGeometry()->SetSensitiveVolume("SG3A");
1653    ((AliMUONChamber*)(*fChambers)[13])->GetGeometry()->SetSensitiveVolume("SG4A");
1654
1655    AliDebug(0,"Finished Init for version 1 - CPC chamber type");
1656    //cp
1657    AliDebug(0,"Start Init for Trigger Circuits");
1658    for (i=0; i<AliMUONConstants::NTriggerCircuit(); i++) {
1659      ( (AliMUONTriggerCircuit*) (*fTriggerCircuits)[i])->Init(i);
1660    }
1661    AliDebug(0,"Finished Init for Trigger Circuits");
1662    //cp
1663
1664 }
1665
1666 //_______________________________________________________________________________
1667 Int_t  AliMUONv3::GetChamberId(Int_t volId) const
1668 {
1669 // Check if the volume with specified  volId is a sensitive volume (gas)
1670 // of some chamber and returns the chamber number;
1671 // if not sensitive volume - return 0.
1672 // ---
1673
1674   for (Int_t i = 1; i <= AliMUONConstants::NCh(); i++)
1675     if ( ((AliMUONChamber*)(*fChambers)[i-1])->IsSensId(volId) ) return i;
1676
1677   return 0;
1678 }
1679 //_______________________________________________________________________________
1680 void AliMUONv3::StepManager()
1681 {
1682   // Stepmanager for the chambers
1683
1684  if (fStepManagerVersionOld) {
1685     StepManagerOld();
1686     return;
1687   }
1688
1689   // Only charged tracks
1690   if( !(gMC->TrackCharge()) ) return;
1691   // Only charged tracks
1692
1693   // Only gas gap inside chamber
1694   // Tag chambers and record hits when track enters
1695   Int_t   idvol=-1;
1696   Int_t   iChamber=0;
1697   Int_t   id=0;
1698   Int_t   copy;
1699   const  Float_t kBig = 1.e10;
1700
1701   id=gMC->CurrentVolID(copy);
1702   iChamber = GetChamberId(id);
1703   idvol=GetChamberId(id)-1;
1704
1705   if (idvol == -1) return;
1706
1707    if( gMC->IsTrackEntering() ) {
1708      Float_t theta = fTrackMomentum.Theta();
1709      if ((TMath::Pi()-theta)*kRaddeg>=15.) gMC->SetMaxStep(fStepMaxInActiveGas); // We use Pi-theta because z is negative
1710   }
1711
1712 //  if (GetDebug()) {
1713 //     Float_t z = ( (AliMUONChamber*)(*fChambers)[idvol])->Z() ;
1714 //      Info("StepManager Step","Active volume found %d chamber %d Z chamber is %f ",idvol,iChamber, z);
1715 //   }
1716   // Particule id and mass,
1717   Int_t     ipart = gMC->TrackPid();
1718   Float_t   mass  = gMC->TrackMass();
1719
1720   fDestepSum[idvol]+=gMC->Edep();
1721   // Get current particle id (ipart), track position (pos)  and momentum (mom)
1722   if ( fStepSum[idvol]==0.0 )  gMC->TrackMomentum(fTrackMomentum);
1723   fStepSum[idvol]+=gMC->TrackStep();
1724
1725 //   if (GetDebug()) {
1726 //     Info("StepManager Step","iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g",
1727 //       iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg, mass, fStepSum[idvol], gMC->Edep());
1728 //     Info("StepManager Step","Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(), fTrackMomentum.Z()) ;
1729 //     gMC->TrackPosition(fTrackPosition);
1730 //     Info("StepManager Step","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
1731 //   }
1732
1733   // Track left chamber or StepSum larger than fStepMaxInActiveGas
1734   if ( gMC->IsTrackExiting() ||
1735        gMC->IsTrackStop() ||
1736        gMC->IsTrackDisappeared()||
1737        (fStepSum[idvol]>fStepMaxInActiveGas) ) {
1738
1739     if   ( gMC->IsTrackExiting() ||
1740            gMC->IsTrackStop() ||
1741            gMC->IsTrackDisappeared() ) gMC->SetMaxStep(kBig);
1742
1743     gMC->TrackPosition(fTrackPosition);
1744     Float_t theta = fTrackMomentum.Theta();
1745     Float_t phi   = fTrackMomentum.Phi();
1746
1747     TLorentzVector backToWire( fStepSum[idvol]/2.*sin(theta)*cos(phi),
1748                                fStepSum[idvol]/2.*sin(theta)*sin(phi),
1749                                fStepSum[idvol]/2.*cos(theta),0.0       );
1750     //     if (GetDebug())
1751     //       Info("StepManager Exit","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
1752     //     if (GetDebug())
1753     //        Info("StepManager Exit ","Track backToWire %f %f %f",backToWire.X(),backToWire.Y(),backToWire.Z()) ;
1754     fTrackPosition-=backToWire;
1755
1756     //-------------- Angle effect
1757     // Ratio between energy loss of particle and Mip as a function of BetaGamma of particle (Energy/Mass)
1758
1759     Float_t betaxGamma    = fTrackMomentum.P()/mass;//  pc/mc2
1760     Float_t sigmaEffect10degrees;
1761     Float_t sigmaEffectThetadegrees;
1762     Float_t eLossParticleELossMip;
1763     Float_t yAngleEffect=0.;
1764     Float_t thetawires      =  TMath::Abs( TMath::ASin( TMath::Sin(TMath::Pi()-theta) * TMath::Sin(phi) ) );// We use Pi-theta because z is negative
1765
1766
1767     if (fAngleEffect){
1768     if ( (betaxGamma >3.2)   &&  (thetawires*kRaddeg<=15.) ) {
1769       betaxGamma=TMath::Log(betaxGamma);
1770       eLossParticleELossMip = fElossRatio->Eval(betaxGamma);
1771       // 10 degrees is a reference for a model (arbitrary)
1772       sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers
1773       // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
1774       sigmaEffectThetadegrees =  sigmaEffect10degrees/fAngleEffectNorma->Eval(thetawires*kRaddeg);  // For 5mm gap
1775       if ( (iChamber==1)  ||  (iChamber==2) )
1776         sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm)
1777       yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm
1778     }
1779     }
1780
1781     // One hit per chamber
1782     GetMUONData()->AddHit(fIshunt, gAlice->GetMCApp()->GetCurrentTrackNumber(), iChamber, ipart,
1783                           fTrackPosition.X(), fTrackPosition.Y()+yAngleEffect, fTrackPosition.Z(), 0.0,
1784                           fTrackMomentum.P(),theta, phi, fStepSum[idvol], fDestepSum[idvol],
1785                           fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z());
1786 //     if (GetDebug()){
1787 //       Info("StepManager Exit","Particle exiting from chamber %d",iChamber);
1788 //       Info("StepManager Exit","StepSum %f eloss geant %g ",fStepSum[idvol],fDestepSum[idvol]);
1789 //       Info("StepManager Exit","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
1790 //     }
1791     fStepSum[idvol]  =0; // Reset for the next event
1792     fDestepSum[idvol]=0; // Reset for the next event
1793   }
1794 }
1795
1796 //__________________________________________
1797 void AliMUONv3::StepManagerOld()
1798 {
1799   // Old Stepmanager for the chambers
1800   Int_t          copy, id;
1801   static Int_t   idvol;
1802   static Int_t   vol[2];
1803   Int_t          ipart;
1804   TLorentzVector pos;
1805   TLorentzVector mom;
1806   Float_t        theta,phi;
1807   Float_t        destep, step;
1808
1809   static Float_t sstep;
1810   static Float_t eloss, eloss2, xhit, yhit, zhit, tof, tlength;
1811   const  Float_t kBig = 1.e10;
1812   static Float_t hits[15];
1813
1814   TClonesArray &lhits = *fHits;
1815
1816   //
1817   //
1818   // Only charged tracks
1819   if( !(gMC->TrackCharge()) ) return;
1820   //
1821   // Only gas gap inside chamber
1822   // Tag chambers and record hits when track enters
1823   id=gMC->CurrentVolID(copy);
1824   vol[0] = GetChamberId(id);
1825   idvol = vol[0] -1;
1826
1827   if (idvol == -1) return;
1828
1829   //
1830   // Get current particle id (ipart), track position (pos)  and momentum (mom)
1831   gMC->TrackPosition(pos);
1832   gMC->TrackMomentum(mom);
1833
1834   ipart  = gMC->TrackPid();
1835
1836   //
1837   // momentum loss and steplength in last step
1838   destep = gMC->Edep();
1839   step   = gMC->TrackStep();
1840   // cout<<"------------"<<step<<endl;
1841   //
1842   // record hits when track enters ...
1843   if( gMC->IsTrackEntering()) {
1844
1845       gMC->SetMaxStep(fMaxStepGas);
1846       Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
1847       Double_t rt = TMath::Sqrt(tc);
1848       Double_t pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
1849       Double_t tx = mom[0]/pmom;
1850       Double_t ty = mom[1]/pmom;
1851       Double_t tz = mom[2]/pmom;
1852       Double_t s  = ((AliMUONChamber*)(*fChambers)[idvol])
1853           ->ResponseModel()
1854           ->Pitch()/tz;
1855       theta   = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
1856       phi     = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1857       hits[0] = Float_t(ipart);         // Geant3 particle type
1858       hits[1] = pos[0]+s*tx;            // X-position for hit
1859       hits[2] = pos[1]+s*ty;            // Y-position for hit
1860       hits[3] = pos[2]+s*tz;            // Z-position for hit
1861       hits[4] = theta;                  // theta angle of incidence
1862       hits[5] = phi;                    // phi angle of incidence
1863       hits[8] = 0;//PadHits does not exist anymore  (Float_t) fNPadHits;    // first padhit
1864       hits[9] = -1;                     // last pad hit
1865       hits[10] = mom[3];                // hit momentum P
1866       hits[11] = mom[0];                // Px
1867       hits[12] = mom[1];                // Py
1868       hits[13] = mom[2];                // Pz
1869       tof=gMC->TrackTime();
1870       hits[14] = tof;                   // Time of flight
1871       tlength  = 0;
1872       eloss    = 0;
1873       eloss2   = 0;
1874       sstep=0;
1875       xhit     = pos[0];
1876       yhit     = pos[1];
1877       zhit     = pos[2];
1878       Chamber(idvol).ChargeCorrelationInit();
1879       // Only if not trigger chamber
1880
1881 //       printf("---------------------------\n");
1882 //       printf(">>>> Y =  %f \n",hits[2]);
1883 //       printf("---------------------------\n");
1884
1885
1886
1887      //  if(idvol < AliMUONConstants::NTrackingCh()) {
1888 //        //
1889 //        //  Initialize hit position (cursor) in the segmentation model
1890 //        ((AliMUONChamber*) (*fChambers)[idvol])
1891 //            ->SigGenInit(pos[0], pos[1], pos[2]);
1892 //       } else {
1893 //        //geant3->Gpcxyz();
1894 //        //printf("In the Trigger Chamber #%d\n",idvol-9);
1895 //       }
1896   }
1897   eloss2+=destep;
1898   sstep+=step;
1899
1900   // cout<<sstep<<endl;
1901
1902   //
1903   // Calculate the charge induced on a pad (disintegration) in case
1904   //
1905   // Mip left chamber ...
1906   if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1907       gMC->SetMaxStep(kBig);
1908       eloss   += destep;
1909       tlength += step;
1910
1911       Float_t x0,y0,z0;
1912       Float_t localPos[3];
1913       Float_t globalPos[3] = {pos[0], pos[1], pos[2]};
1914       gMC->Gmtod(globalPos,localPos,1);
1915
1916       if(idvol < AliMUONConstants::NTrackingCh()) {
1917 // tracking chambers
1918           x0 = 0.5*(xhit+pos[0]);
1919           y0 = 0.5*(yhit+pos[1]);
1920           z0 = 0.5*(zhit+pos[2]);
1921       } else {
1922 // trigger chambers
1923           x0 = xhit;
1924           y0 = yhit;
1925           z0 = 0.;
1926       }
1927
1928
1929       //      if (eloss >0)  MakePadHits(x0,y0,z0,eloss,tof,idvol);
1930
1931
1932       hits[6] = tlength;   // track length
1933       hits[7] = eloss2;    // de/dx energy loss
1934
1935
1936       //      if (fNPadHits > (Int_t)hits[8]) {
1937       //          hits[8] = hits[8]+1;
1938       //          hits[9] = 0: // PadHits does not exist anymore (Float_t) fNPadHits;
1939       //}
1940 //
1941 //    new hit
1942
1943       new(lhits[fNhits++])
1944           AliMUONHit(fIshunt, gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1945       eloss = 0;
1946       //
1947       // Check additional signal generation conditions
1948       // defined by the segmentation
1949       // model (boundary crossing conditions)
1950       // only for tracking chambers
1951   } else if
1952       ((idvol < AliMUONConstants::NTrackingCh()) &&
1953        ((AliMUONChamber*) (*fChambers)[idvol])->SigGenCond(pos[0], pos[1], pos[2]))
1954   {
1955       ((AliMUONChamber*) (*fChambers)[idvol])
1956           ->SigGenInit(pos[0], pos[1], pos[2]);
1957
1958       Float_t localPos[3];
1959       Float_t globalPos[3] = {pos[0], pos[1], pos[2]};
1960       gMC->Gmtod(globalPos,localPos,1);
1961
1962       eloss    += destep;
1963
1964       // if (eloss > 0 && idvol < AliMUONConstants::NTrackingCh())
1965       //        MakePadHits(0.5*(xhit+pos[0]),0.5*(yhit+pos[1]),pos[2],eloss,tof,idvol);
1966       xhit     = pos[0];
1967       yhit     = pos[1];
1968       zhit     = pos[2];
1969       eloss = 0;
1970       tlength += step ;
1971       //
1972       // nothing special  happened, add up energy loss
1973   } else {
1974       eloss   += destep;
1975       tlength += step ;
1976   }
1977 }
1978
1979