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