MUON/AliMUONv1.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any 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 <Riostream.h>
  24 #include <TClonesArray.h>
  25 #include <TLorentzVector.h>
  26 #include <TNode.h>
  27 #include <TRandom.h>
  28 #include <TTUBE.h>
  29 #include <TVirtualMC.h>
  30 #include <TParticle.h>
  31
  32 #include "AliCallf77.h"
  33 #include "AliConst.h"
  34 #include "AliMUONChamber.h"
  35 #include "AliMUONConstants.h"
  36 #include "AliMUONFactory.h"
  37 #include "AliMUONHit.h"
  38 #include "AliMUONPadHit.h"
  39 #include "AliMUONTriggerCircuit.h"
  40 #include "AliMUONv1.h"
  41 #include "AliMagF.h"
  42 #include "AliRun.h"
  43
  44 ClassImp(AliMUONv1)
  45
  46 //___________________________________________
  47 AliMUONv1::AliMUONv1() : AliMUON()
  48   ,fTrackMomentum(), fTrackPosition()
  49 {
  50 // Constructor
  51     fChambers   = 0;
  52     fStations   = 0;
  53     fStepManagerVersionOld  = kFALSE;
  54     fStepMaxInActiveGas     = 0.6;
  55     fStepSum    =  0x0;
  56     fDestepSum  =  0x0;
  57     fElossRatio =  0x0;
  58     fAngleEffect10   = 0x0;
  59     fAngleEffectNorma= 0x0;
  60 }
  61 //___________________________________________
  62 AliMUONv1::AliMUONv1(const char *name, const char *title)
  63   : AliMUON(name,title), fTrackMomentum(), fTrackPosition()
  64 {
  65 // Constructor
  66     // By default include all stations
  67     fStations = new Int_t[5];
  68     for (Int_t i=0; i<5; i++) fStations[i] = 1;
  69
  70     AliMUONFactory factory;
  71     factory.Build(this, title);
  72
  73     fStepManagerVersionOld = kFALSE;
  74
  75     fStepMaxInActiveGas = 0.6;
  76
  77     fStepSum   = new Float_t [AliMUONConstants::NCh()];
  78     fDestepSum = new Float_t [AliMUONConstants::NCh()];
  79     for (Int_t i=0; i<AliMUONConstants::NCh(); i++) {
  80       fStepSum[i] =0.0;
  81       fDestepSum[i]=0.0;
  82     }
  83     // Ratio of particle mean eloss with respect MIP's Khalil Boudjemline, sep 2003, PhD.Thesis and Particle Data Book
  84     fElossRatio = new TF1("ElossRatio","[0]+[1]*x+[2]*x*x+[3]*x*x*x+[4]*x*x*x*x",0.5,5.);
  85     fElossRatio->SetParameter(0,1.02138);
  86     fElossRatio->SetParameter(1,-9.54149e-02);
  87     fElossRatio->SetParameter(2,+7.83433e-02);
  88     fElossRatio->SetParameter(3,-9.98208e-03);
  89     fElossRatio->SetParameter(4,+3.83279e-04);
  90
  91     // Angle effect in tracking chambers at theta =10 degres as a function of ElossRatio (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) (in micrometers)
  92     fAngleEffect10 = new TF1("AngleEffect10","[0]+[1]*x+[2]*x*x",0.5,3.0);
  93     fAngleEffect10->SetParameter(0, 1.90691e+02);
  94     fAngleEffect10->SetParameter(1,-6.62258e+01);
  95     fAngleEffect10->SetParameter(2,+1.28247e+01);
  96     // Angle effect: Normalisation form theta=10 degres to theta between 0 and 10 (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis)
  97     // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
  98     fAngleEffectNorma = new TF1("AngleEffectNorma","[0]+[1]*x+[2]*x*x+[3]*x*x*x",0.0,10.0);
  99     fAngleEffectNorma->SetParameter(0,4.148);
 100     fAngleEffectNorma->SetParameter(1,-6.809e-01);
 101     fAngleEffectNorma->SetParameter(2,5.151e-02);
 102     fAngleEffectNorma->SetParameter(3,-1.490e-03);
 103 }
 104
 105 //___________________________________________
 106 void AliMUONv1::CreateGeometry()
 107 {
 108 //
 109 //   Note: all chambers have the same structure, which could be
 110 //   easily parameterised. This was intentionally not done in order
 111 //   to give a starting point for the implementation of the actual
 112 //   design of each station.
 113   Int_t *idtmed = fIdtmed->GetArray()-1099;
 114
 115 //   Distance between Stations
 116 //
 117      Float_t bpar[3];
 118      Float_t tpar[3];
 119 //      Float_t pgpar[10];
 120      Float_t zpos1, zpos2, zfpos;
 121      // Outer excess and inner recess for mother volume radius
 122      // with respect to ROuter and RInner
 123      Float_t dframep=.001; // Value for station 3 should be 6 ...
 124      // Width (RdPhi) of the frame crosses for stations 1 and 2 (cm)
 125 //      Float_t dframep1=.001;
 126      Float_t dframep1 = 11.0;
 127 //      Bool_t frameCrosses=kFALSE;
 128      Bool_t frameCrosses=kTRUE;
 129      Float_t *dum=0;
 130
 131 //      Float_t dframez=0.9;
 132      // Half of the total thickness of frame crosses (including DAlu)
 133      // for each chamber in stations 1 and 2:
 134      // 3% of X0 of composite material,
 135      // but taken as Aluminium here, with same thickness in number of X0
 136      Float_t dframez = 3. * 8.9 / 100;
 137 //      Float_t dr;
 138      Float_t dstation;
 139
 140 //
 141 //   Rotation matrices in the x-y plane
 142      Int_t idrotm[1199];
 143 //   phi=   0 deg
 144      AliMatrix(idrotm[1100],  90.,   0., 90.,  90., 0., 0.);
 145 //   phi=  90 deg
 146      AliMatrix(idrotm[1101],  90.,  90., 90., 180., 0., 0.);
 147 //   phi= 180 deg
 148      AliMatrix(idrotm[1102],  90., 180., 90., 270., 0., 0.);
 149 //   phi= 270 deg
 150      AliMatrix(idrotm[1103],  90., 270., 90.,   0., 0., 0.);
 151 //
 152      Float_t phi=2*TMath::Pi()/12/2;
 153
 154 //
 155 //   pointer to the current chamber
 156 //   pointer to the current chamber
 157      Int_t idAlu1=idtmed[1103]; // medium 4
 158      Int_t idAlu2=idtmed[1104]; // medium 5
 159 //     Int_t idAlu1=idtmed[1100];
 160 //     Int_t idAlu2=idtmed[1100];
 161      Int_t idAir=idtmed[1100]; // medium 1
 162 //      Int_t idGas=idtmed[1105]; // medium 6 = Ar-isoC4H10 gas
 163      Int_t idGas=idtmed[1108]; // medium 9 = Ar-CO2 gas (80%+20%)
 164
 165
 166      AliMUONChamber *iChamber, *iChamber1, *iChamber2;
 167
 168      if (fStations[0]) {
 169
 170 //********************************************************************
 171 //                            Station 1                             **
 172 //********************************************************************
 173 //  CONCENTRIC
 174      // indices 1 and 2 for first and second chambers in the station
 175      // iChamber (first chamber) kept for other quanties than Z,
 176      // assumed to be the same in both chambers
 177      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[0];
 178      iChamber2 =(AliMUONChamber*) (*fChambers)[1];
 179      zpos1=iChamber1->Z();
 180      zpos2=iChamber2->Z();
 181      dstation = TMath::Abs(zpos2 - zpos1);
 182      // DGas decreased from standard one (0.5)
 183      iChamber->SetDGas(0.4); iChamber2->SetDGas(0.4);
 184      // DAlu increased from standard one (3% of X0),
 185      // because more electronics with smaller pads
 186      iChamber->SetDAlu(3.5 * 8.9 / 100.); iChamber2->SetDAlu(3.5 * 8.9 / 100.);
 187      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
 188
 189 //
 190 //   Mother volume
 191      tpar[0] = iChamber->RInner()-dframep;
 192      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 193      tpar[2] = dstation/5;
 194
 195      gMC->Gsvolu("S01M", "TUBE", idAir, tpar, 3);
 196      gMC->Gsvolu("S02M", "TUBE", idAir, tpar, 3);
 197      gMC->Gspos("S01M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 198      gMC->Gspos("S02M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 199 // // Aluminium frames
 200 // // Outer frames
 201 //      pgpar[0] = 360/12/2;
 202 //      pgpar[1] = 360.;
 203 //      pgpar[2] = 12.;
 204 //      pgpar[3] =   2;
 205 //      pgpar[4] = -dframez/2;
 206 //      pgpar[5] = iChamber->ROuter();
 207 //      pgpar[6] = pgpar[5]+dframep1;
 208 //      pgpar[7] = +dframez/2;
 209 //      pgpar[8] = pgpar[5];
 210 //      pgpar[9] = pgpar[6];
 211 //      gMC->Gsvolu("S01O", "PGON", idAlu1, pgpar, 10);
 212 //      gMC->Gsvolu("S02O", "PGON", idAlu1, pgpar, 10);
 213 //      gMC->Gspos("S01O",1,"S01M", 0.,0.,-zfpos,  0,"ONLY");
 214 //      gMC->Gspos("S01O",2,"S01M", 0.,0.,+zfpos,  0,"ONLY");
 215 //      gMC->Gspos("S02O",1,"S02M", 0.,0.,-zfpos,  0,"ONLY");
 216 //      gMC->Gspos("S02O",2,"S02M", 0.,0.,+zfpos,  0,"ONLY");
 217 // //
 218 // // Inner frame
 219 //      tpar[0]= iChamber->RInner()-dframep1;
 220 //      tpar[1]= iChamber->RInner();
 221 //      tpar[2]= dframez/2;
 222 //      gMC->Gsvolu("S01I", "TUBE", idAlu1, tpar, 3);
 223 //      gMC->Gsvolu("S02I", "TUBE", idAlu1, tpar, 3);
 224
 225 //      gMC->Gspos("S01I",1,"S01M", 0.,0.,-zfpos,  0,"ONLY");
 226 //      gMC->Gspos("S01I",2,"S01M", 0.,0.,+zfpos,  0,"ONLY");
 227 //      gMC->Gspos("S02I",1,"S02M", 0.,0.,-zfpos,  0,"ONLY");
 228 //      gMC->Gspos("S02I",2,"S02M", 0.,0.,+zfpos,  0,"ONLY");
 229 //
 230 // Frame Crosses
 231      if (frameCrosses) {
 232          // outside gas
 233          // security for inside mother volume
 234          bpar[0] = (iChamber->ROuter() - iChamber->RInner())
 235            * TMath::Cos(TMath::ASin(dframep1 /
 236                                    (iChamber->ROuter() - iChamber->RInner())))
 237            / 2.0;
 238          bpar[1] = dframep1/2;
 239          // total thickness will be (4 * bpar[2]) for each chamber,
 240          // which has to be equal to (2 * dframez) - DAlu
 241          bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
 242          gMC->Gsvolu("S01B", "BOX", idAlu1, bpar, 3);
 243          gMC->Gsvolu("S02B", "BOX", idAlu1, bpar, 3);
 244
 245          gMC->Gspos("S01B",1,"S01M", -iChamber->RInner()-bpar[0] , 0, zfpos,
 246                     idrotm[1100],"ONLY");
 247          gMC->Gspos("S01B",2,"S01M",  iChamber->RInner()+bpar[0] , 0, zfpos,
 248                     idrotm[1100],"ONLY");
 249          gMC->Gspos("S01B",3,"S01M", 0, -iChamber->RInner()-bpar[0] , zfpos,
 250                     idrotm[1101],"ONLY");
 251          gMC->Gspos("S01B",4,"S01M", 0,  iChamber->RInner()+bpar[0] , zfpos,
 252                     idrotm[1101],"ONLY");
 253          gMC->Gspos("S01B",5,"S01M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 254                     idrotm[1100],"ONLY");
 255          gMC->Gspos("S01B",6,"S01M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 256                     idrotm[1100],"ONLY");
 257          gMC->Gspos("S01B",7,"S01M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 258                     idrotm[1101],"ONLY");
 259          gMC->Gspos("S01B",8,"S01M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 260                     idrotm[1101],"ONLY");
 261
 262          gMC->Gspos("S02B",1,"S02M", -iChamber->RInner()-bpar[0] , 0, zfpos,
 263                     idrotm[1100],"ONLY");
 264          gMC->Gspos("S02B",2,"S02M",  iChamber->RInner()+bpar[0] , 0, zfpos,
 265                     idrotm[1100],"ONLY");
 266          gMC->Gspos("S02B",3,"S02M", 0, -iChamber->RInner()-bpar[0] , zfpos,
 267                     idrotm[1101],"ONLY");
 268          gMC->Gspos("S02B",4,"S02M", 0,  iChamber->RInner()+bpar[0] , zfpos,
 269                     idrotm[1101],"ONLY");
 270          gMC->Gspos("S02B",5,"S02M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 271                     idrotm[1100],"ONLY");
 272          gMC->Gspos("S02B",6,"S02M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 273                     idrotm[1100],"ONLY");
 274          gMC->Gspos("S02B",7,"S02M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 275                     idrotm[1101],"ONLY");
 276          gMC->Gspos("S02B",8,"S02M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 277                     idrotm[1101],"ONLY");
 278      }
 279 //
 280 //   Chamber Material represented by Alu sheet
 281      tpar[0]= iChamber->RInner();
 282      tpar[1]= iChamber->ROuter();
 283      tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
 284      gMC->Gsvolu("S01A", "TUBE",  idAlu2, tpar, 3);
 285      gMC->Gsvolu("S02A", "TUBE",idAlu2, tpar, 3);
 286      gMC->Gspos("S01A", 1, "S01M", 0., 0., 0.,  0, "ONLY");
 287      gMC->Gspos("S02A", 1, "S02M", 0., 0., 0.,  0, "ONLY");
 288 //
 289 //   Sensitive volumes
 290      // tpar[2] = iChamber->DGas();
 291      tpar[2] = iChamber->DGas()/2;
 292      gMC->Gsvolu("S01G", "TUBE", idGas, tpar, 3);
 293      gMC->Gsvolu("S02G", "TUBE", idGas, tpar, 3);
 294      gMC->Gspos("S01G", 1, "S01A", 0., 0., 0.,  0, "ONLY");
 295      gMC->Gspos("S02G", 1, "S02A", 0., 0., 0.,  0, "ONLY");
 296 //
 297 // Frame Crosses to be placed inside gas
 298      // NONE: chambers are sensitive everywhere
 299 //      if (frameCrosses) {
 300
 301 //       dr = (iChamber->ROuter() - iChamber->RInner());
 302 //       bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
 303 //       bpar[1] = dframep1/2;
 304 //       bpar[2] = iChamber->DGas()/2;
 305 //       gMC->Gsvolu("S01F", "BOX", idAlu1, bpar, 3);
 306 //       gMC->Gsvolu("S02F", "BOX", idAlu1, bpar, 3);
 307
 308 //       gMC->Gspos("S01F",1,"S01G", +iChamber->RInner()+bpar[0] , 0, 0,
 309 //                  idrotm[1100],"ONLY");
 310 //       gMC->Gspos("S01F",2,"S01G", -iChamber->RInner()-bpar[0] , 0, 0,
 311 //                  idrotm[1100],"ONLY");
 312 //       gMC->Gspos("S01F",3,"S01G", 0, +iChamber->RInner()+bpar[0] , 0,
 313 //                  idrotm[1101],"ONLY");
 314 //       gMC->Gspos("S01F",4,"S01G", 0, -iChamber->RInner()-bpar[0] , 0,
 315 //                  idrotm[1101],"ONLY");
 316
 317 //       gMC->Gspos("S02F",1,"S02G", +iChamber->RInner()+bpar[0] , 0, 0,
 318 //                  idrotm[1100],"ONLY");
 319 //       gMC->Gspos("S02F",2,"S02G", -iChamber->RInner()-bpar[0] , 0, 0,
 320 //                  idrotm[1100],"ONLY");
 321 //       gMC->Gspos("S02F",3,"S02G", 0, +iChamber->RInner()+bpar[0] , 0,
 322 //                  idrotm[1101],"ONLY");
 323 //       gMC->Gspos("S02F",4,"S02G", 0, -iChamber->RInner()-bpar[0] , 0,
 324 //                  idrotm[1101],"ONLY");
 325 //      }
 326      }
 327      if (fStations[1]) {
 328
 329 //********************************************************************
 330 //                            Station 2                             **
 331 //********************************************************************
 332      // indices 1 and 2 for first and second chambers in the station
 333      // iChamber (first chamber) kept for other quanties than Z,
 334      // assumed to be the same in both chambers
 335      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[2];
 336      iChamber2 =(AliMUONChamber*) (*fChambers)[3];
 337      zpos1=iChamber1->Z();
 338      zpos2=iChamber2->Z();
 339      dstation = TMath::Abs(zpos2 - zpos1);
 340      // DGas and DAlu not changed from standard values
 341      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2;
 342
 343 //
 344 //   Mother volume
 345      tpar[0] = iChamber->RInner()-dframep;
 346      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 347      tpar[2] = dstation/5;
 348
 349      gMC->Gsvolu("S03M", "TUBE", idAir, tpar, 3);
 350      gMC->Gsvolu("S04M", "TUBE", idAir, tpar, 3);
 351      gMC->Gspos("S03M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 352      gMC->Gspos("S04M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 353      gMC->Gsbool("S03M", "L3DO");
 354      gMC->Gsbool("S03M", "L3O1");
 355      gMC->Gsbool("S03M", "L3O2");
 356      gMC->Gsbool("S04M", "L3DO");
 357      gMC->Gsbool("S04M", "L3O1");
 358      gMC->Gsbool("S04M", "L3O2");
 359
 360 // // Aluminium frames
 361 // // Outer frames
 362 //      pgpar[0] = 360/12/2;
 363 //      pgpar[1] = 360.;
 364 //      pgpar[2] = 12.;
 365 //      pgpar[3] =   2;
 366 //      pgpar[4] = -dframez/2;
 367 //      pgpar[5] = iChamber->ROuter();
 368 //      pgpar[6] = pgpar[5]+dframep;
 369 //      pgpar[7] = +dframez/2;
 370 //      pgpar[8] = pgpar[5];
 371 //      pgpar[9] = pgpar[6];
 372 //      gMC->Gsvolu("S03O", "PGON", idAlu1, pgpar, 10);
 373 //      gMC->Gsvolu("S04O", "PGON", idAlu1, pgpar, 10);
 374 //      gMC->Gspos("S03O",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 375 //      gMC->Gspos("S03O",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 376 //      gMC->Gspos("S04O",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 377 //      gMC->Gspos("S04O",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 378 // //
 379 // // Inner frame
 380 //      tpar[0]= iChamber->RInner()-dframep;
 381 //      tpar[1]= iChamber->RInner();
 382 //      tpar[2]= dframez/2;
 383 //      gMC->Gsvolu("S03I", "TUBE", idAlu1, tpar, 3);
 384 //      gMC->Gsvolu("S04I", "TUBE", idAlu1, tpar, 3);
 385
 386 //      gMC->Gspos("S03I",1,"S03M", 0.,0.,-zfpos,  0,"ONLY");
 387 //      gMC->Gspos("S03I",2,"S03M", 0.,0.,+zfpos,  0,"ONLY");
 388 //      gMC->Gspos("S04I",1,"S04M", 0.,0.,-zfpos,  0,"ONLY");
 389 //      gMC->Gspos("S04I",2,"S04M", 0.,0.,+zfpos,  0,"ONLY");
 390 //
 391 // Frame Crosses
 392      if (frameCrosses) {
 393          // outside gas
 394          // security for inside mother volume
 395          bpar[0] = (iChamber->ROuter() - iChamber->RInner())
 396            * TMath::Cos(TMath::ASin(dframep1 /
 397                                    (iChamber->ROuter() - iChamber->RInner())))
 398            / 2.0;
 399          bpar[1] = dframep1/2;
 400          // total thickness will be (4 * bpar[2]) for each chamber,
 401          // which has to be equal to (2 * dframez) - DAlu
 402          bpar[2] = (2.0 * dframez - iChamber->DAlu()) / 4.0;
 403          gMC->Gsvolu("S03B", "BOX", idAlu1, bpar, 3);
 404          gMC->Gsvolu("S04B", "BOX", idAlu1, bpar, 3);
 405
 406          gMC->Gspos("S03B",1,"S03M", -iChamber->RInner()-bpar[0] , 0, zfpos,
 407                     idrotm[1100],"ONLY");
 408          gMC->Gspos("S03B",2,"S03M", +iChamber->RInner()+bpar[0] , 0, zfpos,
 409                     idrotm[1100],"ONLY");
 410          gMC->Gspos("S03B",3,"S03M", 0, -iChamber->RInner()-bpar[0] , zfpos,
 411                     idrotm[1101],"ONLY");
 412          gMC->Gspos("S03B",4,"S03M", 0, +iChamber->RInner()+bpar[0] , zfpos,
 413                     idrotm[1101],"ONLY");
 414          gMC->Gspos("S03B",5,"S03M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 415                     idrotm[1100],"ONLY");
 416          gMC->Gspos("S03B",6,"S03M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 417                     idrotm[1100],"ONLY");
 418          gMC->Gspos("S03B",7,"S03M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 419                     idrotm[1101],"ONLY");
 420          gMC->Gspos("S03B",8,"S03M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 421                     idrotm[1101],"ONLY");
 422
 423          gMC->Gspos("S04B",1,"S04M", -iChamber->RInner()-bpar[0] , 0, zfpos,
 424                     idrotm[1100],"ONLY");
 425          gMC->Gspos("S04B",2,"S04M", +iChamber->RInner()+bpar[0] , 0, zfpos,
 426                     idrotm[1100],"ONLY");
 427          gMC->Gspos("S04B",3,"S04M", 0, -iChamber->RInner()-bpar[0] , zfpos,
 428                     idrotm[1101],"ONLY");
 429          gMC->Gspos("S04B",4,"S04M", 0, +iChamber->RInner()+bpar[0] , zfpos,
 430                     idrotm[1101],"ONLY");
 431          gMC->Gspos("S04B",5,"S04M", -iChamber->RInner()-bpar[0] , 0,-zfpos,
 432                     idrotm[1100],"ONLY");
 433          gMC->Gspos("S04B",6,"S04M", +iChamber->RInner()+bpar[0] , 0,-zfpos,
 434                     idrotm[1100],"ONLY");
 435          gMC->Gspos("S04B",7,"S04M", 0, -iChamber->RInner()-bpar[0] ,-zfpos,
 436                     idrotm[1101],"ONLY");
 437          gMC->Gspos("S04B",8,"S04M", 0, +iChamber->RInner()+bpar[0] ,-zfpos,
 438                     idrotm[1101],"ONLY");
 439      }
 440 //
 441 //   Chamber Material represented by Alu sheet
 442      tpar[0]= iChamber->RInner();
 443      tpar[1]= iChamber->ROuter();
 444      tpar[2] = (iChamber->DGas()+iChamber->DAlu())/2;
 445      gMC->Gsvolu("S03A", "TUBE", idAlu2, tpar, 3);
 446      gMC->Gsvolu("S04A", "TUBE", idAlu2, tpar, 3);
 447      gMC->Gspos("S03A", 1, "S03M", 0., 0., 0.,  0, "ONLY");
 448      gMC->Gspos("S04A", 1, "S04M", 0., 0., 0.,  0, "ONLY");
 449 //
 450 //   Sensitive volumes
 451      // tpar[2] = iChamber->DGas();
 452      tpar[2] = iChamber->DGas()/2;
 453      gMC->Gsvolu("S03G", "TUBE", idGas, tpar, 3);
 454      gMC->Gsvolu("S04G", "TUBE", idGas, tpar, 3);
 455      gMC->Gspos("S03G", 1, "S03A", 0., 0., 0.,  0, "ONLY");
 456      gMC->Gspos("S04G", 1, "S04A", 0., 0., 0.,  0, "ONLY");
 457 //
 458 // Frame Crosses to be placed inside gas
 459      // NONE: chambers are sensitive everywhere
 460 //      if (frameCrosses) {
 461
 462 //       dr = (iChamber->ROuter() - iChamber->RInner());
 463 //       bpar[0] = TMath::Sqrt(dr*dr-dframep1*dframep1/4)/2;
 464 //       bpar[1] = dframep1/2;
 465 //       bpar[2] = iChamber->DGas()/2;
 466 //       gMC->Gsvolu("S03F", "BOX", idAlu1, bpar, 3);
 467 //       gMC->Gsvolu("S04F", "BOX", idAlu1, bpar, 3);
 468
 469 //       gMC->Gspos("S03F",1,"S03G", +iChamber->RInner()+bpar[0] , 0, 0,
 470 //                  idrotm[1100],"ONLY");
 471 //       gMC->Gspos("S03F",2,"S03G", -iChamber->RInner()-bpar[0] , 0, 0,
 472 //                  idrotm[1100],"ONLY");
 473 //       gMC->Gspos("S03F",3,"S03G", 0, +iChamber->RInner()+bpar[0] , 0,
 474 //                  idrotm[1101],"ONLY");
 475 //       gMC->Gspos("S03F",4,"S03G", 0, -iChamber->RInner()-bpar[0] , 0,
 476 //                  idrotm[1101],"ONLY");
 477
 478 //       gMC->Gspos("S04F",1,"S04G", +iChamber->RInner()+bpar[0] , 0, 0,
 479 //                  idrotm[1100],"ONLY");
 480 //       gMC->Gspos("S04F",2,"S04G", -iChamber->RInner()-bpar[0] , 0, 0,
 481 //                  idrotm[1100],"ONLY");
 482 //       gMC->Gspos("S04F",3,"S04G", 0, +iChamber->RInner()+bpar[0] , 0,
 483 //                  idrotm[1101],"ONLY");
 484 //       gMC->Gspos("S04F",4,"S04G", 0, -iChamber->RInner()-bpar[0] , 0,
 485 //                  idrotm[1101],"ONLY");
 486 //      }
 487      }
 488      // define the id of tracking media:
 489      Int_t idCopper = idtmed[1110];
 490      Int_t idGlass  = idtmed[1111];
 491      Int_t idCarbon = idtmed[1112];
 492      Int_t idRoha   = idtmed[1113];
 493
 494       // sensitive area: 40*40 cm**2
 495      const Float_t sensLength = 40.;
 496      const Float_t sensHeight = 40.;
 497      const Float_t sensWidth  = 0.5; // according to TDR fig 2.120
 498      const Int_t sensMaterial = idGas;
 499      const Float_t yOverlap   = 1.5;
 500
 501      // PCB dimensions in cm; width: 30 mum copper
 502      const Float_t pcbLength  = sensLength;
 503      const Float_t pcbHeight  = 60.;
 504      const Float_t pcbWidth   = 0.003;
 505      const Int_t pcbMaterial  = idCopper;
 506
 507      // Insulating material: 200 mum glass fiber glued to pcb
 508      const Float_t insuLength = pcbLength;
 509      const Float_t insuHeight = pcbHeight;
 510      const Float_t insuWidth  = 0.020;
 511      const Int_t insuMaterial = idGlass;
 512
 513      // Carbon fiber panels: 200mum carbon/epoxy skin
 514      const Float_t panelLength = sensLength;
 515      const Float_t panelHeight = sensHeight;
 516      const Float_t panelWidth  = 0.020;
 517      const Int_t panelMaterial = idCarbon;
 518
 519      // rohacell between the two carbon panels
 520      const Float_t rohaLength = sensLength;
 521      const Float_t rohaHeight = sensHeight;
 522      const Float_t rohaWidth  = 0.5;
 523      const Int_t rohaMaterial = idRoha;
 524
 525      // Frame around the slat: 2 sticks along length,2 along height
 526      // H: the horizontal ones
 527      const Float_t hFrameLength = pcbLength;
 528      const Float_t hFrameHeight = 1.5;
 529      const Float_t hFrameWidth  = sensWidth;
 530      const Int_t hFrameMaterial = idGlass;
 531
 532      // V: the vertical ones
 533      const Float_t vFrameLength = 4.0;
 534      const Float_t vFrameHeight = sensHeight + hFrameHeight;
 535      const Float_t vFrameWidth  = sensWidth;
 536      const Int_t vFrameMaterial = idGlass;
 537
 538      // B: the horizontal border filled with rohacell
 539      const Float_t bFrameLength = hFrameLength;
 540      const Float_t bFrameHeight = (pcbHeight - sensHeight)/2. - hFrameHeight;
 541      const Float_t bFrameWidth  = hFrameWidth;
 542      const Int_t bFrameMaterial = idRoha;
 543
 544      // NULOC: 30 mum copper + 200 mum vetronite (same radiation length as 14mum copper)
 545      const Float_t nulocLength = 2.5;
 546      const Float_t nulocHeight = 7.5;
 547      const Float_t nulocWidth  = 0.0030 + 0.0014; // equivalent copper width of vetronite;
 548      const Int_t   nulocMaterial = idCopper;
 549
 550      const Float_t slatHeight = pcbHeight;
 551      const Float_t slatWidth = sensWidth + 2.*(pcbWidth + insuWidth +
 552                                                2.* panelWidth + rohaWidth);
 553      const Int_t slatMaterial = idAir;
 554      const Float_t dSlatLength = vFrameLength; // border on left and right
 555
 556      Float_t spar[3];
 557      Int_t i, j;
 558
 559      // the panel volume contains the rohacell
 560
 561      Float_t twidth = 2 * panelWidth + rohaWidth;
 562      Float_t panelpar[3] = { panelLength/2., panelHeight/2., twidth/2. };
 563      Float_t rohapar[3] = { rohaLength/2., rohaHeight/2., rohaWidth/2. };
 564
 565      // insulating material contains PCB-> gas-> 2 borders filled with rohacell
 566
 567      twidth = 2*(insuWidth + pcbWidth) + sensWidth;
 568      Float_t insupar[3] = { insuLength/2., insuHeight/2., twidth/2. };
 569      twidth -= 2 * insuWidth;
 570      Float_t pcbpar[3] = { pcbLength/2., pcbHeight/2., twidth/2. };
 571      Float_t senspar[3] = { sensLength/2., sensHeight/2., sensWidth/2. };
 572      Float_t theight = 2*hFrameHeight + sensHeight;
 573      Float_t hFramepar[3]={hFrameLength/2., theight/2., hFrameWidth/2.};
 574      Float_t bFramepar[3]={bFrameLength/2., bFrameHeight/2., bFrameWidth/2.};
 575      Float_t vFramepar[3]={vFrameLength/2., vFrameHeight/2., vFrameWidth/2.};
 576      Float_t nulocpar[3]={nulocLength/2., nulocHeight/2., nulocWidth/2.};
 577      Float_t xx;
 578      Float_t xxmax = (bFrameLength - nulocLength)/2.;
 579      Int_t index=0;
 580
 581      if (fStations[2]) {
 582
 583 //********************************************************************
 584 //                            Station 3                             **
 585 //********************************************************************
 586      // indices 1 and 2 for first and second chambers in the station
 587      // iChamber (first chamber) kept for other quanties than Z,
 588      // assumed to be the same in both chambers
 589      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[4];
 590      iChamber2 =(AliMUONChamber*) (*fChambers)[5];
 591      zpos1=iChamber1->Z();
 592      zpos2=iChamber2->Z();
 593      dstation = TMath::Abs(zpos2 - zpos1);
 594
 595 //
 596 //   Mother volume
 597      tpar[0] = iChamber->RInner()-dframep;
 598      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 599      tpar[2] = dstation/5;
 600
 601      char *slats5Mother = "S05M";
 602      char *slats6Mother = "S06M";
 603      Float_t zoffs5 = 0;
 604      Float_t zoffs6 = 0;
 605
 606      if (gAlice->GetModule("DIPO")) {
 607        slats5Mother="DDIP";
 608        slats6Mother="DDIP";
 609
 610        zoffs5 = TMath::Abs(zpos1);
 611        zoffs6 = TMath::Abs(zpos2);
 612      }
 613      else {
 614        gMC->Gsvolu("S05M", "TUBE", idAir, tpar, 3);
 615        gMC->Gsvolu("S06M", "TUBE", idAir, tpar, 3);
 616        gMC->Gspos("S05M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 617        gMC->Gspos("S06M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 618      }
 619
 620      // volumes for slat geometry (xx=5,..,10 chamber id):
 621      // Sxx0 Sxx1 Sxx2 Sxx3  -->   Slat Mother volumes
 622      // SxxG                          -->   Sensitive volume (gas)
 623      // SxxP                          -->   PCB (copper)
 624      // SxxI                          -->   Insulator (vetronite)
 625      // SxxC                          -->   Carbon panel
 626      // SxxR                          -->   Rohacell
 627      // SxxH, SxxV                    -->   Horizontal and Vertical frames (vetronite)
 628      // SB5x                          -->   Volumes for the 35 cm long PCB
 629      // slat dimensions: slat is a MOTHER volume!!! made of air
 630
 631      // only for chamber 5: slat 1 has a PCB shorter by 5cm!
 632
 633      Float_t tlength = 35.;
 634      Float_t panelpar2[3]  = { tlength/2., panelpar[1],  panelpar[2]};
 635      Float_t rohapar2[3]   = { tlength/2., rohapar[1],   rohapar[2]};
 636      Float_t insupar2[3]   = { tlength/2., insupar[1],   insupar[2]};
 637      Float_t pcbpar2[3]    = { tlength/2., pcbpar[1],    pcbpar[2]};
 638      Float_t senspar2[3]   = { tlength/2., senspar[1],   senspar[2]};
 639      Float_t hFramepar2[3] = { tlength/2., hFramepar[1], hFramepar[2]};
 640      Float_t bFramepar2[3] = { tlength/2., bFramepar[1], bFramepar[2]};
 641
 642      const Int_t nSlats3 = 5;  // number of slats per quadrant
 643      const Int_t nPCB3[nSlats3] = {3,3,4,3,2}; // n PCB per slat
 644      const Float_t xpos3[nSlats3] = {31., 40., 0., 0., 0.};
 645      Float_t slatLength3[nSlats3];
 646
 647      // create and position the slat (mother) volumes
 648
 649      char volNam5[5];
 650      char volNam6[5];
 651      Float_t xSlat3;
 652
 653      Float_t spar2[3];
 654      for (i = 0; i<nSlats3; i++){
 655        slatLength3[i] = pcbLength * nPCB3[i] + 2. * dSlatLength;
 656        xSlat3 = slatLength3[i]/2. - vFrameLength/2. + xpos3[i];
 657        if (i==1 || i==0) slatLength3[i] -=  2. *dSlatLength; // frame out in PCB with circular border
 658        Float_t ySlat31 =  sensHeight * i - yOverlap * i;
 659        Float_t ySlat32 = -sensHeight * i + yOverlap * i;
 660        spar[0] = slatLength3[i]/2.;
 661        spar[1] = slatHeight/2.;
 662        spar[2] = slatWidth/2. * 1.01;
 663        // take away 5 cm from the first slat in chamber 5
 664        Float_t xSlat32 = 0;
 665        if (i==1 || i==2) { // 1 pcb is shortened by 5cm
 666          spar2[0] = spar[0]-5./2.;
 667          xSlat32 = xSlat3 - 5/2.;
 668        }
 669        else {
 670          spar2[0] = spar[0];
 671          xSlat32 = xSlat3;
 672        }
 673        spar2[1] = spar[1];
 674        spar2[2] = spar[2];
 675        Float_t dzCh3=spar[2] * 1.01;
 676        // zSlat to be checked (odd downstream or upstream?)
 677        Float_t zSlat = (i%2 ==0)? -spar[2] : spar[2];
 678        sprintf(volNam5,"S05%d",i);
 679        gMC->Gsvolu(volNam5,"BOX",slatMaterial,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",slatMaterial,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",panelMaterial,panelpar,3);
 700      gMC->Gsvolu("SB5C","BOX",panelMaterial,panelpar2,3);
 701      gMC->Gsvolu("S06C","BOX",panelMaterial,panelpar,3);
 702
 703      // create the rohacell volume
 704
 705      gMC->Gsvolu("S05R","BOX",rohaMaterial,rohapar,3);
 706      gMC->Gsvolu("SB5R","BOX",rohaMaterial,rohapar2,3);
 707      gMC->Gsvolu("S06R","BOX",rohaMaterial,rohapar,3);
 708
 709      // create the insulating material volume
 710
 711      gMC->Gsvolu("S05I","BOX",insuMaterial,insupar,3);
 712      gMC->Gsvolu("SB5I","BOX",insuMaterial,insupar2,3);
 713      gMC->Gsvolu("S06I","BOX",insuMaterial,insupar,3);
 714
 715      // create the PCB volume
 716
 717      gMC->Gsvolu("S05P","BOX",pcbMaterial,pcbpar,3);
 718      gMC->Gsvolu("SB5P","BOX",pcbMaterial,pcbpar2,3);
 719      gMC->Gsvolu("S06P","BOX",pcbMaterial,pcbpar,3);
 720
 721      // create the sensitive volumes,
 722      gMC->Gsvolu("S05G","BOX",sensMaterial,dum,0);
 723      gMC->Gsvolu("S06G","BOX",sensMaterial,dum,0);
 724
 725
 726      // create the vertical frame volume
 727
 728      gMC->Gsvolu("S05V","BOX",vFrameMaterial,vFramepar,3);
 729      gMC->Gsvolu("S06V","BOX",vFrameMaterial,vFramepar,3);
 730
 731      // create the horizontal frame volume
 732
 733      gMC->Gsvolu("S05H","BOX",hFrameMaterial,hFramepar,3);
 734      gMC->Gsvolu("SB5H","BOX",hFrameMaterial,hFramepar2,3);
 735      gMC->Gsvolu("S06H","BOX",hFrameMaterial,hFramepar,3);
 736
 737      // create the horizontal border volume
 738
 739      gMC->Gsvolu("S05B","BOX",bFrameMaterial,bFramepar,3);
 740      gMC->Gsvolu("SB5B","BOX",bFrameMaterial,bFramepar2,3);
 741      gMC->Gsvolu("S06B","BOX",bFrameMaterial,bFramepar,3);
 742
 743      index=0;
 744      for (i = 0; i<nSlats3; i++){
 745        sprintf(volNam5,"S05%d",i);
 746        sprintf(volNam6,"S06%d",i);
 747        Float_t xvFrame  = (slatLength3[i] - vFrameLength)/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<nPCB3[i]; j++){
 759          index++;
 760          Float_t xx = sensLength * (-nPCB3[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 == nPCB3[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 < nPCB3[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 = ( pcbHeight - bFrameHeight ) / 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",nulocMaterial,nulocpar,3);
 814      gMC->Gsvolu("S06N","BOX",nulocMaterial,nulocpar,3);
 815      index = 0;
 816      Float_t xxmax2 = xxmax - 5./2.;
 817      for (xx = -xxmax; xx<=xxmax; xx+=2*nulocLength) {
 818        index++;
 819        gMC->Gspos("S05N",2*index-1,"S05B", xx, 0.,-bFrameWidth/4., 0, "ONLY");
 820        gMC->Gspos("S05N",2*index  ,"S05B", xx, 0., bFrameWidth/4., 0, "ONLY");
 821        if (xx > -xxmax2 && xx< xxmax2) {
 822          gMC->Gspos("S05N",2*index-1,"SB5B", xx, 0.,-bFrameWidth/4., 0, "ONLY");
 823          gMC->Gspos("S05N",2*index  ,"SB5B", xx, 0., bFrameWidth/4., 0, "ONLY");
 824        }
 825        gMC->Gspos("S06N",2*index-1,"S06B", xx, 0.,-bFrameWidth/4., 0, "ONLY");
 826        gMC->Gspos("S06N",2*index  ,"S06B", xx, 0., bFrameWidth/4., 0, "ONLY");
 827      }
 828
 829      // position the volumes approximating the circular section of the pipe
 830      Float_t yoffs = sensHeight/2. - yOverlap;
 831      Float_t epsilon = 0.001;
 832      Int_t ndiv=6;
 833      Float_t divpar[3];
 834      Double_t dydiv= sensHeight/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      for (Int_t idiv=0;idiv<ndiv; idiv++){
 841        ydiv+= dydiv;
 842        Float_t xdiv = 0.;
 843        if (ydiv<rmin) xdiv= rmin * TMath::Sin( TMath::ACos(ydiv/rmin) );
 844        divpar[0] = (pcbLength-xdiv)/2.;
 845        divpar[1] = dydiv/2. - epsilon;
 846        divpar[2] = sensWidth/2.;
 847        Float_t xvol=(pcbLength+xdiv)/2.+1.999;
 848        Float_t yvol=ydiv + dydiv/2.;
 849        //printf ("y ll = %f y ur = %f \n",yvol - divpar[1], yvol + divpar[1]);
 850        gMC->Gsposp("S05G",imax+4*idiv+1,slats5Mother,-xvol, yvol, zoffs5-z1-z2, 0, "ONLY",divpar,3);
 851        gMC->Gsposp("S06G",imax+4*idiv+1,slats6Mother,-xvol, yvol, zoffs6-z1-z2, 0, "ONLY",divpar,3);
 852        gMC->Gsposp("S05G",imax+4*idiv+2,slats5Mother,-xvol,-yvol, zoffs5-z1-z2, 0, "ONLY",divpar,3);
 853        gMC->Gsposp("S06G",imax+4*idiv+2,slats6Mother,-xvol,-yvol, zoffs6-z1-z2, 0, "ONLY",divpar,3);
 854        gMC->Gsposp("S05G",imax+4*idiv+3,slats5Mother,+xvol, yvol, zoffs5-z1+z2, 0, "ONLY",divpar,3);
 855        gMC->Gsposp("S06G",imax+4*idiv+3,slats6Mother,+xvol, yvol, zoffs6-z1+z2, 0, "ONLY",divpar,3);
 856        gMC->Gsposp("S05G",imax+4*idiv+4,slats5Mother,+xvol,-yvol, zoffs5-z1+z2, 0, "ONLY",divpar,3);
 857        gMC->Gsposp("S06G",imax+4*idiv+4,slats6Mother,+xvol,-yvol, zoffs6-z1+z2, 0, "ONLY",divpar,3);
 858      }
 859      }
 860
 861  if (fStations[3]) {
 862
 863 //********************************************************************
 864 //                            Station 4                             **
 865 //********************************************************************
 866      // indices 1 and 2 for first and second chambers in the station
 867      // iChamber (first chamber) kept for other quanties than Z,
 868      // assumed to be the same in both chambers
 869      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[6];
 870      iChamber2 =(AliMUONChamber*) (*fChambers)[7];
 871      zpos1=iChamber1->Z();
 872      zpos2=iChamber2->Z();
 873      dstation = TMath::Abs(zpos2 - zpos1);
 874 //      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2; // not used any more
 875
 876 //
 877 //   Mother volume
 878      tpar[0] = iChamber->RInner()-dframep;
 879      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
 880      tpar[2] = dstation/4;
 881
 882      gMC->Gsvolu("S07M", "TUBE", idAir, tpar, 3);
 883      gMC->Gsvolu("S08M", "TUBE", idAir, tpar, 3);
 884      gMC->Gspos("S07M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
 885      gMC->Gspos("S08M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
 886
 887
 888      const Int_t nSlats4 = 6;  // number of slats per quadrant
 889      const Int_t nPCB4[nSlats4] = {4,4,5,5,4,3}; // n PCB per slat
 890      const Float_t xpos4[nSlats4] = {38.5, 40., 0., 0., 0., 0.};
 891      Float_t slatLength4[nSlats4];
 892
 893      // create and position the slat (mother) volumes
 894
 895      char volNam7[5];
 896      char volNam8[5];
 897      Float_t xSlat4;
 898      Float_t ySlat4;
 899
 900      for (i = 0; i<nSlats4; i++){
 901        slatLength4[i] = pcbLength * nPCB4[i] + 2. * dSlatLength;
 902        xSlat4 = slatLength4[i]/2. - vFrameLength/2. + xpos4[i];
 903        if (i==1) slatLength4[i] -=  2. *dSlatLength; // frame out in PCB with circular border
 904        ySlat4 =  sensHeight * i - yOverlap *i;
 905
 906        spar[0] = slatLength4[i]/2.;
 907        spar[1] = slatHeight/2.;
 908        spar[2] = slatWidth/2.*1.01;
 909        Float_t dzCh4=spar[2]*1.01;
 910        // zSlat to be checked (odd downstream or upstream?)
 911        Float_t zSlat = (i%2 ==0)? spar[2] : -spar[2];
 912        sprintf(volNam7,"S07%d",i);
 913        gMC->Gsvolu(volNam7,"BOX",slatMaterial,spar,3);
 914        gMC->Gspos(volNam7, i*4+1,"S07M",-xSlat4, ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
 915        gMC->Gspos(volNam7, i*4+2,"S07M",+xSlat4, ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
 916        if (i>0) {
 917          gMC->Gspos(volNam7, i*4+3,"S07M",-xSlat4,-ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
 918          gMC->Gspos(volNam7, i*4+4,"S07M",+xSlat4,-ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
 919        }
 920        sprintf(volNam8,"S08%d",i);
 921        gMC->Gsvolu(volNam8,"BOX",slatMaterial,spar,3);
 922        gMC->Gspos(volNam8, i*4+1,"S08M",-xSlat4, ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
 923        gMC->Gspos(volNam8, i*4+2,"S08M",+xSlat4, ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
 924        if (i>0) {
 925          gMC->Gspos(volNam8, i*4+3,"S08M",-xSlat4,-ySlat4, -zSlat-2.*dzCh4, 0, "ONLY");
 926          gMC->Gspos(volNam8, i*4+4,"S08M",+xSlat4,-ySlat4, -zSlat+2.*dzCh4, 0, "ONLY");
 927        }
 928      }
 929
 930
 931      // create the panel volume
 932
 933      gMC->Gsvolu("S07C","BOX",panelMaterial,panelpar,3);
 934      gMC->Gsvolu("S08C","BOX",panelMaterial,panelpar,3);
 935
 936      // create the rohacell volume
 937
 938      gMC->Gsvolu("S07R","BOX",rohaMaterial,rohapar,3);
 939      gMC->Gsvolu("S08R","BOX",rohaMaterial,rohapar,3);
 940
 941      // create the insulating material volume
 942
 943      gMC->Gsvolu("S07I","BOX",insuMaterial,insupar,3);
 944      gMC->Gsvolu("S08I","BOX",insuMaterial,insupar,3);
 945
 946      // create the PCB volume
 947
 948      gMC->Gsvolu("S07P","BOX",pcbMaterial,pcbpar,3);
 949      gMC->Gsvolu("S08P","BOX",pcbMaterial,pcbpar,3);
 950
 951      // create the sensitive volumes,
 952
 953      gMC->Gsvolu("S07G","BOX",sensMaterial,dum,0);
 954      gMC->Gsvolu("S08G","BOX",sensMaterial,dum,0);
 955
 956      // create the vertical frame volume
 957
 958      gMC->Gsvolu("S07V","BOX",vFrameMaterial,vFramepar,3);
 959      gMC->Gsvolu("S08V","BOX",vFrameMaterial,vFramepar,3);
 960
 961      // create the horizontal frame volume
 962
 963      gMC->Gsvolu("S07H","BOX",hFrameMaterial,hFramepar,3);
 964      gMC->Gsvolu("S08H","BOX",hFrameMaterial,hFramepar,3);
 965
 966      // create the horizontal border volume
 967
 968      gMC->Gsvolu("S07B","BOX",bFrameMaterial,bFramepar,3);
 969      gMC->Gsvolu("S08B","BOX",bFrameMaterial,bFramepar,3);
 970
 971      index=0;
 972      for (i = 0; i<nSlats4; i++){
 973        sprintf(volNam7,"S07%d",i);
 974        sprintf(volNam8,"S08%d",i);
 975        Float_t xvFrame  = (slatLength4[i] - vFrameLength)/2.;
 976        // position the vertical frames
 977        if (i!=1 && i!=0) {
 978          gMC->Gspos("S07V",2*i-1,volNam7, xvFrame, 0., 0. , 0, "ONLY");
 979          gMC->Gspos("S07V",2*i  ,volNam7,-xvFrame, 0., 0. , 0, "ONLY");
 980          gMC->Gspos("S08V",2*i-1,volNam8, xvFrame, 0., 0. , 0, "ONLY");
 981          gMC->Gspos("S08V",2*i  ,volNam8,-xvFrame, 0., 0. , 0, "ONLY");
 982        }
 983        // position the panels and the insulating material
 984        for (j=0; j<nPCB4[i]; j++){
 985          index++;
 986          Float_t xx = sensLength * (-nPCB4[i]/2.+j+.5);
 987
 988          Float_t zPanel = spar[2] - panelpar[2];
 989          gMC->Gspos("S07C",2*index-1,volNam7, xx, 0., zPanel , 0, "ONLY");
 990          gMC->Gspos("S07C",2*index  ,volNam7, xx, 0.,-zPanel , 0, "ONLY");
 991          gMC->Gspos("S08C",2*index-1,volNam8, xx, 0., zPanel , 0, "ONLY");
 992          gMC->Gspos("S08C",2*index  ,volNam8, xx, 0.,-zPanel , 0, "ONLY");
 993
 994          gMC->Gspos("S07I",index,volNam7, xx, 0., 0 , 0, "ONLY");
 995          gMC->Gspos("S08I",index,volNam8, xx, 0., 0 , 0, "ONLY");
 996        }
 997      }
 998
 999      // position the rohacell volume inside the panel volume
1000      gMC->Gspos("S07R",1,"S07C",0.,0.,0.,0,"ONLY");
1001      gMC->Gspos("S08R",1,"S08C",0.,0.,0.,0,"ONLY");
1002
1003      // position the PCB volume inside the insulating material volume
1004      gMC->Gspos("S07P",1,"S07I",0.,0.,0.,0,"ONLY");
1005      gMC->Gspos("S08P",1,"S08I",0.,0.,0.,0,"ONLY");
1006      // position the horizontal frame volume inside the PCB volume
1007      gMC->Gspos("S07H",1,"S07P",0.,0.,0.,0,"ONLY");
1008      gMC->Gspos("S08H",1,"S08P",0.,0.,0.,0,"ONLY");
1009      // position the sensitive volume inside the horizontal frame volume
1010      gMC->Gsposp("S07G",1,"S07H",0.,0.,0.,0,"ONLY",senspar,3);
1011      gMC->Gsposp("S08G",1,"S08H",0.,0.,0.,0,"ONLY",senspar,3);
1012      // position the border volumes inside the PCB volume
1013      Float_t yborder = ( pcbHeight - bFrameHeight ) / 2.;
1014      gMC->Gspos("S07B",1,"S07P",0., yborder,0.,0,"ONLY");
1015      gMC->Gspos("S07B",2,"S07P",0.,-yborder,0.,0,"ONLY");
1016      gMC->Gspos("S08B",1,"S08P",0., yborder,0.,0,"ONLY");
1017      gMC->Gspos("S08B",2,"S08P",0.,-yborder,0.,0,"ONLY");
1018
1019      // create the NULOC volume and position it in the horizontal frame
1020
1021      gMC->Gsvolu("S07N","BOX",nulocMaterial,nulocpar,3);
1022      gMC->Gsvolu("S08N","BOX",nulocMaterial,nulocpar,3);
1023      index = 0;
1024      for (xx = -xxmax; xx<=xxmax; xx+=2*nulocLength) {
1025        index++;
1026        gMC->Gspos("S07N",2*index-1,"S07B", xx, 0.,-bFrameWidth/4., 0, "ONLY");
1027        gMC->Gspos("S07N",2*index  ,"S07B", xx, 0., bFrameWidth/4., 0, "ONLY");
1028        gMC->Gspos("S08N",2*index-1,"S08B", xx, 0.,-bFrameWidth/4., 0, "ONLY");
1029        gMC->Gspos("S08N",2*index  ,"S08B", xx, 0., bFrameWidth/4., 0, "ONLY");
1030      }
1031
1032      // position the volumes approximating the circular section of the pipe
1033      Float_t yoffs = sensHeight/2. - yOverlap;
1034      Float_t epsilon = 0.001;
1035      Int_t ndiv=6;
1036      Float_t divpar[3];
1037      Double_t dydiv= sensHeight/ndiv;
1038      Double_t ydiv = yoffs -dydiv;
1039      Int_t imax=0;
1040      imax = 1;
1041      Float_t rmin = 40.;
1042      Float_t z1 = -spar[2], z2=2*spar[2]*1.01;
1043      for (Int_t idiv=0;idiv<ndiv; idiv++){
1044        ydiv+= dydiv;
1045        Float_t xdiv = 0.;
1046        if (ydiv<rmin) xdiv= rmin * TMath::Sin( TMath::ACos(ydiv/rmin) );
1047        divpar[0] = (pcbLength-xdiv)/2.;
1048        divpar[1] = dydiv/2. - epsilon;
1049        divpar[2] = sensWidth/2.;
1050        Float_t xvol=(pcbLength+xdiv)/2.+1.999;
1051        Float_t yvol=ydiv + dydiv/2.;
1052        gMC->Gsposp("S07G",imax+4*idiv+1,"S07M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
1053        gMC->Gsposp("S08G",imax+4*idiv+1,"S08M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
1054        gMC->Gsposp("S07G",imax+4*idiv+2,"S07M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
1055        gMC->Gsposp("S08G",imax+4*idiv+2,"S08M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
1056        gMC->Gsposp("S07G",imax+4*idiv+3,"S07M", xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
1057        gMC->Gsposp("S08G",imax+4*idiv+3,"S08M", xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
1058        gMC->Gsposp("S07G",imax+4*idiv+4,"S07M", xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
1059        gMC->Gsposp("S08G",imax+4*idiv+4,"S08M", xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
1060      }
1061
1062
1063
1064
1065
1066  }
1067
1068  if (fStations[4]) {
1069
1070
1071 //********************************************************************
1072 //                            Station 5                             **
1073 //********************************************************************
1074      // indices 1 and 2 for first and second chambers in the station
1075      // iChamber (first chamber) kept for other quanties than Z,
1076      // assumed to be the same in both chambers
1077      iChamber1 = iChamber = (AliMUONChamber*) (*fChambers)[8];
1078      iChamber2 =(AliMUONChamber*) (*fChambers)[9];
1079      zpos1=iChamber1->Z();
1080      zpos2=iChamber2->Z();
1081      dstation = TMath::Abs(zpos2 - zpos1);
1082 //      zfpos=-(iChamber->DGas()+dframez+iChamber->DAlu())/2; // not used any more
1083
1084 //
1085 //   Mother volume
1086      tpar[0] = iChamber->RInner()-dframep;
1087      tpar[1] = (iChamber->ROuter()+dframep)/TMath::Cos(phi);
1088      tpar[2] = dstation/5.;
1089
1090      gMC->Gsvolu("S09M", "TUBE", idAir, tpar, 3);
1091      gMC->Gsvolu("S10M", "TUBE", idAir, tpar, 3);
1092      gMC->Gspos("S09M", 1, "ALIC", 0., 0., zpos1 , 0, "ONLY");
1093      gMC->Gspos("S10M", 1, "ALIC", 0., 0., zpos2 , 0, "ONLY");
1094
1095
1096      const Int_t nSlats5 = 7;  // number of slats per quadrant
1097      const Int_t nPCB5[nSlats5] = {5,5,6,6,5,4,3}; // n PCB per slat
1098      const Float_t xpos5[nSlats5] = {38.5, 40., 0., 0., 0., 0., 0.};
1099      Float_t slatLength5[nSlats5];
1100      char volNam9[5];
1101      char volNam10[5];
1102      Float_t xSlat5;
1103      Float_t ySlat5;
1104
1105      for (i = 0; i<nSlats5; i++){
1106        slatLength5[i] = pcbLength * nPCB5[i] + 2. * dSlatLength;
1107        xSlat5 = slatLength5[i]/2. - vFrameLength/2. +xpos5[i];
1108        if (i==1 || i==0) slatLength5[i] -=  2. *dSlatLength; // frame out in PCB with circular border
1109        ySlat5 = sensHeight * i - yOverlap * i;
1110        spar[0] = slatLength5[i]/2.;
1111        spar[1] = slatHeight/2.;
1112        spar[2] = slatWidth/2. * 1.01;
1113        Float_t dzCh5=spar[2]*1.01;
1114        // zSlat to be checked (odd downstream or upstream?)
1115        Float_t zSlat = (i%2 ==0)? -spar[2] : spar[2];
1116        sprintf(volNam9,"S09%d",i);
1117        gMC->Gsvolu(volNam9,"BOX",slatMaterial,spar,3);
1118        gMC->Gspos(volNam9, i*4+1,"S09M",-xSlat5, ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
1119        gMC->Gspos(volNam9, i*4+2,"S09M",+xSlat5, ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
1120        if (i>0) {
1121            gMC->Gspos(volNam9, i*4+3,"S09M",-xSlat5,-ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
1122            gMC->Gspos(volNam9, i*4+4,"S09M",+xSlat5,-ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
1123        }
1124        sprintf(volNam10,"S10%d",i);
1125        gMC->Gsvolu(volNam10,"BOX",slatMaterial,spar,3);
1126        gMC->Gspos(volNam10, i*4+1,"S10M",-xSlat5, ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
1127        gMC->Gspos(volNam10, i*4+2,"S10M",+xSlat5, ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
1128        if (i>0) {
1129            gMC->Gspos(volNam10, i*4+3,"S10M",-xSlat5,-ySlat5, -zSlat-2.*dzCh5, 0, "ONLY");
1130            gMC->Gspos(volNam10, i*4+4,"S10M",+xSlat5,-ySlat5, -zSlat+2.*dzCh5, 0, "ONLY");
1131        }
1132      }
1133
1134      // create the panel volume
1135
1136      gMC->Gsvolu("S09C","BOX",panelMaterial,panelpar,3);
1137      gMC->Gsvolu("S10C","BOX",panelMaterial,panelpar,3);
1138
1139      // create the rohacell volume
1140
1141      gMC->Gsvolu("S09R","BOX",rohaMaterial,rohapar,3);
1142      gMC->Gsvolu("S10R","BOX",rohaMaterial,rohapar,3);
1143
1144      // create the insulating material volume
1145
1146      gMC->Gsvolu("S09I","BOX",insuMaterial,insupar,3);
1147      gMC->Gsvolu("S10I","BOX",insuMaterial,insupar,3);
1148
1149      // create the PCB volume
1150
1151      gMC->Gsvolu("S09P","BOX",pcbMaterial,pcbpar,3);
1152      gMC->Gsvolu("S10P","BOX",pcbMaterial,pcbpar,3);
1153
1154      // create the sensitive volumes,
1155
1156      gMC->Gsvolu("S09G","BOX",sensMaterial,dum,0);
1157      gMC->Gsvolu("S10G","BOX",sensMaterial,dum,0);
1158
1159      // create the vertical frame volume
1160
1161      gMC->Gsvolu("S09V","BOX",vFrameMaterial,vFramepar,3);
1162      gMC->Gsvolu("S10V","BOX",vFrameMaterial,vFramepar,3);
1163
1164      // create the horizontal frame volume
1165
1166      gMC->Gsvolu("S09H","BOX",hFrameMaterial,hFramepar,3);
1167      gMC->Gsvolu("S10H","BOX",hFrameMaterial,hFramepar,3);
1168
1169      // create the horizontal border volume
1170
1171      gMC->Gsvolu("S09B","BOX",bFrameMaterial,bFramepar,3);
1172      gMC->Gsvolu("S10B","BOX",bFrameMaterial,bFramepar,3);
1173
1174      index=0;
1175      for (i = 0; i<nSlats5; i++){
1176        sprintf(volNam9,"S09%d",i);
1177        sprintf(volNam10,"S10%d",i);
1178        Float_t xvFrame  = (slatLength5[i] - vFrameLength)/2.;
1179        // position the vertical frames
1180        if (i!=1 && i!=0) {
1181          gMC->Gspos("S09V",2*i-1,volNam9, xvFrame, 0., 0. , 0, "ONLY");
1182          gMC->Gspos("S09V",2*i  ,volNam9,-xvFrame, 0., 0. , 0, "ONLY");
1183          gMC->Gspos("S10V",2*i-1,volNam10, xvFrame, 0., 0. , 0, "ONLY");
1184          gMC->Gspos("S10V",2*i  ,volNam10,-xvFrame, 0., 0. , 0, "ONLY");
1185        }
1186
1187        // position the panels and the insulating material
1188        for (j=0; j<nPCB5[i]; j++){
1189          index++;
1190          Float_t xx = sensLength * (-nPCB5[i]/2.+j+.5);
1191
1192          Float_t zPanel = spar[2] - panelpar[2];
1193          gMC->Gspos("S09C",2*index-1,volNam9, xx, 0., zPanel , 0, "ONLY");
1194          gMC->Gspos("S09C",2*index  ,volNam9, xx, 0.,-zPanel , 0, "ONLY");
1195          gMC->Gspos("S10C",2*index-1,volNam10, xx, 0., zPanel , 0, "ONLY");
1196          gMC->Gspos("S10C",2*index  ,volNam10, xx, 0.,-zPanel , 0, "ONLY");
1197
1198          gMC->Gspos("S09I",index,volNam9, xx, 0., 0 , 0, "ONLY");
1199          gMC->Gspos("S10I",index,volNam10, xx, 0., 0 , 0, "ONLY");
1200        }
1201      }
1202
1203      // position the rohacell volume inside the panel volume
1204      gMC->Gspos("S09R",1,"S09C",0.,0.,0.,0,"ONLY");
1205      gMC->Gspos("S10R",1,"S10C",0.,0.,0.,0,"ONLY");
1206
1207      // position the PCB volume inside the insulating material volume
1208      gMC->Gspos("S09P",1,"S09I",0.,0.,0.,0,"ONLY");
1209      gMC->Gspos("S10P",1,"S10I",0.,0.,0.,0,"ONLY");
1210      // position the horizontal frame volume inside the PCB volume
1211      gMC->Gspos("S09H",1,"S09P",0.,0.,0.,0,"ONLY");
1212      gMC->Gspos("S10H",1,"S10P",0.,0.,0.,0,"ONLY");
1213      // position the sensitive volume inside the horizontal frame volume
1214      gMC->Gsposp("S09G",1,"S09H",0.,0.,0.,0,"ONLY",senspar,3);
1215      gMC->Gsposp("S10G",1,"S10H",0.,0.,0.,0,"ONLY",senspar,3);
1216      // position the border volumes inside the PCB volume
1217      Float_t yborder = ( pcbHeight - bFrameHeight ) / 2.;
1218      gMC->Gspos("S09B",1,"S09P",0., yborder,0.,0,"ONLY");
1219      gMC->Gspos("S09B",2,"S09P",0.,-yborder,0.,0,"ONLY");
1220      gMC->Gspos("S10B",1,"S10P",0., yborder,0.,0,"ONLY");
1221      gMC->Gspos("S10B",2,"S10P",0.,-yborder,0.,0,"ONLY");
1222
1223      // create the NULOC volume and position it in the horizontal frame
1224
1225      gMC->Gsvolu("S09N","BOX",nulocMaterial,nulocpar,3);
1226      gMC->Gsvolu("S10N","BOX",nulocMaterial,nulocpar,3);
1227      index = 0;
1228      for (xx = -xxmax; xx<=xxmax; xx+=2*nulocLength) {
1229        index++;
1230        gMC->Gspos("S09N",2*index-1,"S09B", xx, 0.,-bFrameWidth/4., 0, "ONLY");
1231        gMC->Gspos("S09N",2*index  ,"S09B", xx, 0., bFrameWidth/4., 0, "ONLY");
1232        gMC->Gspos("S10N",2*index-1,"S10B", xx, 0.,-bFrameWidth/4., 0, "ONLY");
1233        gMC->Gspos("S10N",2*index  ,"S10B", xx, 0., bFrameWidth/4., 0, "ONLY");
1234      }
1235      // position the volumes approximating the circular section of the pipe
1236      Float_t yoffs = sensHeight/2. - yOverlap;
1237      Float_t epsilon = 0.001;
1238      Int_t ndiv=6;
1239      Float_t divpar[3];
1240      Double_t dydiv= sensHeight/ndiv;
1241      Double_t ydiv = yoffs -dydiv;
1242      Int_t imax=0;
1243      //     for (Int_t islat=0; islat<nSlats3; islat++) imax += nPCB3[islat];
1244      imax = 1;
1245      Float_t rmin = 40.;
1246      Float_t z1 = spar[2], z2=2*spar[2]*1.01;
1247      for (Int_t idiv=0;idiv<ndiv; idiv++){
1248        ydiv+= dydiv;
1249        Float_t xdiv = 0.;
1250        if (ydiv<rmin) xdiv= rmin * TMath::Sin( TMath::ACos(ydiv/rmin) );
1251        divpar[0] = (pcbLength-xdiv)/2.;
1252        divpar[1] = dydiv/2. - epsilon;
1253        divpar[2] = sensWidth/2.;
1254        Float_t xvol=(pcbLength+xdiv)/2. + 1.999;
1255        Float_t yvol=ydiv + dydiv/2.;
1256        gMC->Gsposp("S09G",imax+4*idiv+1,"S09M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
1257        gMC->Gsposp("S10G",imax+4*idiv+1,"S10M", -xvol, yvol, -z1-z2, 0, "ONLY",divpar,3);
1258        gMC->Gsposp("S09G",imax+4*idiv+2,"S09M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
1259        gMC->Gsposp("S10G",imax+4*idiv+2,"S10M", -xvol,-yvol, -z1-z2, 0, "ONLY",divpar,3);
1260        gMC->Gsposp("S09G",imax+4*idiv+3,"S09M", +xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
1261        gMC->Gsposp("S10G",imax+4*idiv+3,"S10M", +xvol, yvol, -z1+z2, 0, "ONLY",divpar,3);
1262        gMC->Gsposp("S09G",imax+4*idiv+4,"S09M", +xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
1263        gMC->Gsposp("S10G",imax+4*idiv+4,"S10M", +xvol,-yvol, -z1+z2, 0, "ONLY",divpar,3);
1264      }
1265
1266  }
1267
1268 //********************************************************************
1269 //                            Trigger                               **
1270 //********************************************************************
1271  /*
1272     zpos1 and zpos2 are the middle of the first and second
1273     planes of station 1 (+1m for second station):
1274     zpos1=(zpos1m+zpos1p)/2=(15999+16071)/2=16035 mm, thick/2=40 mm
1275     zpos2=(zpos2m+zpos2p)/2=(16169+16241)/2=16205 mm, thick/2=40 mm
1276     zposxm and zposxp= middles of gaz gaps within a detection plane
1277     rem: the total thickness accounts for 1 mm of al on both
1278     side of the RPCs (see zpos1 and zpos2)
1279  */
1280
1281 // vertical gap between right and left chambers (kDXZERO*2=4cm)
1282  const Float_t kDXZERO=2.;
1283 // main distances for chamber definition in first plane/first station
1284  const Float_t kXMIN=34.;
1285  const Float_t kXMED=51.;
1286  const Float_t kXMAX=272.;
1287 // kXMAX will become 255. in real life. segmentation to be updated accordingly
1288 // (see fig.2-4 & 2-5 of Local Trigger Board PRR)
1289  const Float_t kYMIN=34.;
1290  const Float_t kYMAX=51.;
1291 // inner/outer radius of flange between beam shield. and chambers (1/station)
1292  const Float_t kRMIN[2]={50.,50.};
1293  const Float_t kRMAX[2]={64.,68.};
1294 // z position of the middle of the gas gap in mother vol
1295  const Float_t kZm=-3.6;
1296  const Float_t kZp=+3.6;
1297
1298  iChamber1 = (AliMUONChamber*) (*fChambers)[10];
1299  zpos1 = iChamber1->Z();
1300
1301 // ratio of zpos1m/zpos1p and inverse for first plane
1302  Float_t zmp=(zpos1+3.6)/(zpos1-3.6);
1303  Float_t zpm=1./zmp;
1304
1305  Int_t icount=0; // chamber counter (0 1 2 3)
1306
1307  for (Int_t istation=0; istation<2; istation++) { // loop on stations
1308      for (Int_t iplane=0; iplane<2; iplane++) {   // loop on detection planes
1309
1310          Int_t iVolNum=1; // counter Volume Number
1311          icount = Int_t(iplane*TMath::Power(2,0))+
1312              Int_t(istation*TMath::Power(2,1));
1313
1314          char volPlane[5];
1315          sprintf(volPlane,"SM%d%d",istation+1,iplane+1);
1316
1317          iChamber = (AliMUONChamber*) (*fChambers)[10+icount];
1318          Float_t zpos = iChamber->Z();
1319
1320 // mother volume
1321          tpar[0] = iChamber->RInner();
1322          tpar[1] = iChamber->ROuter();
1323          tpar[2] = 4.0;
1324          gMC->Gsvolu(volPlane,"TUBE",idAir,tpar,3);
1325
1326 // Flange between beam shielding and RPC
1327          tpar[0]= kRMIN[istation];
1328          tpar[1]= kRMAX[istation];
1329          tpar[2]= 4.0;
1330
1331          char volFlange[5];
1332          sprintf(volFlange,"SF%dA",icount+1);
1333          gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     //Al
1334          gMC->Gspos(volFlange,1,volPlane,0.,0.,0.,0,"MANY");
1335
1336 // scaling factor
1337          Float_t zRatio = zpos / zpos1;
1338
1339 // chamber prototype
1340          tpar[0]= 0.;
1341          tpar[1]= 0.;
1342          tpar[2]= 0.;
1343
1344          char volAlu[5]; // Alu
1345          char volBak[5]; // Bakelite
1346          char volGaz[5]; // Gas streamer
1347
1348          sprintf(volAlu,"SC%dA",icount+1);
1349          sprintf(volBak,"SB%dA",icount+1);
1350          sprintf(volGaz,"SG%dA",icount+1);
1351
1352          gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);           // Al
1353          gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);     // Bakelite
1354          gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);     // Gas streamer
1355
1356 // chamber type A
1357          tpar[0] = -1.;
1358          tpar[1] = -1.;
1359
1360          Float_t xA=(kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
1361          Float_t yAm=0.;
1362          Float_t yAp=0.;
1363
1364          tpar[2] = 0.1;
1365          gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
1366          tpar[2] = 0.3;
1367          gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
1368
1369          tpar[2] = 0.4;
1370          tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
1371          tpar[1] = kYMIN*zRatio;
1372
1373          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xA,yAm,-kZm,0,"ONLY",tpar,3);
1374          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xA,yAp,-kZp,0,"ONLY",tpar,3);
1375          gMC->Gsbool(volAlu,volFlange);
1376
1377 // chamber type B
1378          Float_t tpar1save=tpar[1];
1379          Float_t y1msave=yAm;
1380          Float_t y1psave=yAp;
1381
1382          tpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
1383          tpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
1384
1385          Float_t xB=(kDXZERO+kXMIN)*zRatio+tpar[0];
1386          Float_t yBp=(y1msave+tpar1save)*zpm+tpar[1];
1387          Float_t yBm=(y1psave+tpar1save)*zmp+tpar[1];
1388
1389          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xB, yBp,-kZp,0,"ONLY",tpar,3);
1390          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xB, yBm,-kZm,0,"ONLY",tpar,3);
1391          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xB,-yBp,-kZp,0,"ONLY",tpar,3);
1392          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xB,-yBm,-kZm,0,"ONLY",tpar,3);
1393
1394 // chamber type C (note : same Z than type B)
1395          tpar1save=tpar[1];
1396          y1msave=yBm;
1397          y1psave=yBp;
1398
1399          tpar[0] = (kXMAX/2)*zRatio;
1400          tpar[1] = (kYMAX/2)*zRatio;
1401
1402          Float_t xC=kDXZERO*zRatio+tpar[0];
1403          Float_t yCp=(y1psave+tpar1save)*1.+tpar[1];
1404          Float_t yCm=(y1msave+tpar1save)*1.+tpar[1];
1405
1406          gMC->Gsposp(volAlu,iVolNum++,volPlane,-xC, yCp,-kZp,0,"ONLY",tpar,3);
1407          gMC->Gsposp(volAlu,iVolNum++,volPlane, xC, yCm,-kZm,0,"ONLY",tpar,3);
1408          gMC->Gsposp(volAlu,iVolNum++,volPlane,-xC,-yCp,-kZp,0,"ONLY",tpar,3);
1409          gMC->Gsposp(volAlu,iVolNum++,volPlane, xC,-yCm,-kZm,0,"ONLY",tpar,3);
1410
1411 // chamber type D, E and F (same size)
1412          tpar1save=tpar[1];
1413          y1msave=yCm;
1414          y1psave=yCp;
1415
1416          tpar[0] = (kXMAX/2.)*zRatio;
1417          tpar[1] =  kYMIN*zRatio;
1418
1419          Float_t xD=kDXZERO*zRatio+tpar[0];
1420          Float_t yDp=(y1msave+tpar1save)*zpm+tpar[1];
1421          Float_t yDm=(y1psave+tpar1save)*zmp+tpar[1];
1422
1423          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD, yDm,-kZm,0,"ONLY",tpar,3);
1424          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD, yDp,-kZp,0,"ONLY",tpar,3);
1425          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD,-yDm,-kZm,0,"ONLY",tpar,3);
1426          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD,-yDp,-kZp,0,"ONLY",tpar,3);
1427
1428          tpar1save=tpar[1];
1429          y1msave=yDm;
1430          y1psave=yDp;
1431          Float_t yEp=(y1msave+tpar1save)*zpm+tpar[1];
1432          Float_t yEm=(y1psave+tpar1save)*zmp+tpar[1];
1433
1434          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD, yEp,-kZp,0,"ONLY",tpar,3);
1435          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD, yEm,-kZm,0,"ONLY",tpar,3);
1436          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD,-yEp,-kZp,0,"ONLY",tpar,3);
1437          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD,-yEm,-kZm,0,"ONLY",tpar,3);
1438
1439          tpar1save=tpar[1];
1440          y1msave=yEm;
1441          y1psave=yEp;
1442          Float_t yFp=(y1msave+tpar1save)*zpm+tpar[1];
1443          Float_t yFm=(y1psave+tpar1save)*zmp+tpar[1];
1444
1445          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD, yFm,-kZm,0,"ONLY",tpar,3);
1446          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD, yFp,-kZp,0,"ONLY",tpar,3);
1447          gMC->Gsposp(volAlu,iVolNum++,volPlane, -xD,-yFm,-kZm,0,"ONLY",tpar,3);
1448          gMC->Gsposp(volAlu,iVolNum++,volPlane,  xD,-yFp,-kZp,0,"ONLY",tpar,3);
1449
1450 // Positioning plane in ALICE
1451          gMC->Gspos(volPlane,1,"ALIC",0.,0.,zpos,0,"ONLY");
1452
1453      } // end loop on detection planes
1454  } // end loop on stations
1455
1456 }
1457
1458
1459 //___________________________________________
1460 void AliMUONv1::CreateMaterials()
1461 {
1462   // *** DEFINITION OF AVAILABLE MUON MATERIALS ***
1463   //
1464   //     Ar-CO2 gas (80%+20%)
1465     Float_t ag1[3]   = { 39.95,12.01,16. };
1466     Float_t zg1[3]   = { 18.,6.,8. };
1467     Float_t wg1[3]   = { .8,.0667,.13333 };
1468     Float_t dg1      = .001821;
1469     //
1470     //     Ar-buthane-freon gas -- trigger chambers
1471     Float_t atr1[4]  = { 39.95,12.01,1.01,19. };
1472     Float_t ztr1[4]  = { 18.,6.,1.,9. };
1473     Float_t wtr1[4]  = { .56,.1262857,.2857143,.028 };
1474     Float_t dtr1     = .002599;
1475     //
1476     //     Ar-CO2 gas
1477     Float_t agas[3]  = { 39.95,12.01,16. };
1478     Float_t zgas[3]  = { 18.,6.,8. };
1479     Float_t wgas[3]  = { .74,.086684,.173316 };
1480     Float_t dgas     = .0018327;
1481     //
1482     //     Ar-Isobutane gas (80%+20%) -- tracking
1483     Float_t ag[3]    = { 39.95,12.01,1.01 };
1484     Float_t zg[3]    = { 18.,6.,1. };
1485     Float_t wg[3]    = { .8,.057,.143 };
1486     Float_t dg       = .0019596;
1487     //
1488     //     Ar-Isobutane-Forane-SF6 gas (49%+7%+40%+4%) -- trigger
1489     Float_t atrig[5] = { 39.95,12.01,1.01,19.,32.066 };
1490     Float_t ztrig[5] = { 18.,6.,1.,9.,16. };
1491     Float_t wtrig[5] = { .49,1.08,1.5,1.84,0.04 };
1492     Float_t dtrig    = .0031463;
1493     //
1494     //     bakelite
1495
1496     Float_t abak[3] = {12.01 , 1.01 , 16.};
1497     Float_t zbak[3] = {6.     , 1.   , 8.};
1498     Float_t wbak[3] = {6.     , 6.   , 1.};
1499     Float_t dbak = 1.4;
1500
1501     Float_t epsil, stmin, deemax, tmaxfd, stemax;
1502
1503     Int_t iSXFLD   = gAlice->Field()->Integ();
1504     Float_t sXMGMX = gAlice->Field()->Max();
1505     //
1506     // --- Define the various materials for GEANT ---
1507     AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
1508     AliMaterial(10, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
1509     AliMaterial(15, "AIR$      ", 14.61, 7.3, .001205, 30423.24, 67500);
1510     AliMixture(19, "Bakelite$", abak, zbak, dbak, -3, wbak);
1511     AliMixture(20, "ArC4H10 GAS$", ag, zg, dg, 3, wg);
1512     AliMixture(21, "TRIG GAS$", atrig, ztrig, dtrig, -5, wtrig);
1513     AliMixture(22, "ArCO2 80%$", ag1, zg1, dg1, 3, wg1);
1514     AliMixture(23, "Ar-freon $", atr1, ztr1, dtr1, 4, wtr1);
1515     AliMixture(24, "ArCO2 GAS$", agas, zgas, dgas, 3, wgas);
1516     // materials for slat:
1517     //     Sensitive area: gas (already defined)
1518     //     PCB: copper
1519     //     insulating material and frame: vetronite
1520     //     walls: carbon, rohacell, carbon
1521   Float_t aglass[5]={12.01, 28.09, 16.,   10.8,  23.};
1522   Float_t zglass[5]={ 6.,   14.,    8.,    5.,   11.};
1523   Float_t wglass[5]={ 0.5,  0.105, 0.355, 0.03,  0.01};
1524   Float_t dglass=1.74;
1525
1526   // rohacell: C9 H13 N1 O2
1527   Float_t arohac[4] = {12.01,  1.01, 14.010, 16.};
1528   Float_t zrohac[4] = { 6.,    1.,    7.,     8.};
1529   Float_t wrohac[4] = { 9.,   13.,    1.,     2.};
1530   Float_t drohac    = 0.03;
1531
1532   AliMaterial(31, "COPPER$",   63.54,    29.,   8.96,  1.4, 0.);
1533   AliMixture(32, "Vetronite$",aglass, zglass, dglass,    5, wglass);
1534   AliMaterial(33, "Carbon$",   12.01,     6.,  2.265, 18.8, 49.9);
1535   AliMixture(34, "Rohacell$", arohac, zrohac, drohac,   -4, wrohac);
1536
1537
1538     epsil  = .001; // Tracking precision,
1539     stemax = -1.;  // Maximum displacement for multiple scat
1540     tmaxfd = -20.; // Maximum angle due to field deflection
1541     deemax = -.3;  // Maximum fractional energy loss, DLS
1542     stmin  = -.8;
1543     //
1544     //    Air
1545     AliMedium(1, "AIR_CH_US         ", 15, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
1546     //
1547     //    Aluminum
1548
1549     AliMedium(4, "ALU_CH_US          ", 9, 0, iSXFLD, sXMGMX, tmaxfd, fMaxStepAlu,
1550             fMaxDestepAlu, epsil, stmin);
1551     AliMedium(5, "ALU_CH_US          ", 10, 0, iSXFLD, sXMGMX, tmaxfd, fMaxStepAlu,
1552             fMaxDestepAlu, epsil, stmin);
1553     //
1554     //    Ar-isoC4H10 gas
1555
1556     AliMedium(6, "AR_CH_US          ", 20, 1, iSXFLD, sXMGMX, tmaxfd, fMaxStepGas,
1557             fMaxDestepGas, epsil, stmin);
1558 //
1559     //    Ar-Isobuthane-Forane-SF6 gas
1560
1561     AliMedium(7, "GAS_CH_TRIGGER    ", 21, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
1562
1563     AliMedium(8, "BAKE_CH_TRIGGER   ", 19, 0, iSXFLD, sXMGMX, tmaxfd, fMaxStepAlu,
1564             fMaxDestepAlu, epsil, stmin);
1565
1566     AliMedium(9, "ARG_CO2   ", 22, 1, iSXFLD, sXMGMX, tmaxfd, fMaxStepGas,
1567             fMaxDestepAlu, epsil, stmin);
1568     // tracking media for slats: check the parameters!!
1569     AliMedium(11, "PCB_COPPER        ", 31, 0, iSXFLD, sXMGMX, tmaxfd,
1570               fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1571     AliMedium(12, "VETRONITE         ", 32, 0, iSXFLD, sXMGMX, tmaxfd,
1572               fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1573     AliMedium(13, "CARBON            ", 33, 0, iSXFLD, sXMGMX, tmaxfd,
1574               fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1575     AliMedium(14, "Rohacell          ", 34, 0, iSXFLD, sXMGMX, tmaxfd,
1576               fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1577 }
1578
1579 //___________________________________________
1580
1581 void AliMUONv1::Init()
1582 {
1583    //
1584    // Initialize Tracking Chambers
1585    //
1586
1587    if(fDebug) printf("\n%s: Start Init for version 1 - CPC chamber type\n\n",ClassName());
1588    Int_t i;
1589    for (i=0; i<AliMUONConstants::NCh(); i++) {
1590        ( (AliMUONChamber*) (*fChambers)[i])->Init();
1591    }
1592
1593    //
1594    // Set the chamber (sensitive region) GEANT identifier
1595    ((AliMUONChamber*)(*fChambers)[0])->SetGid(gMC->VolId("S01G"));
1596    ((AliMUONChamber*)(*fChambers)[1])->SetGid(gMC->VolId("S02G"));
1597
1598    ((AliMUONChamber*)(*fChambers)[2])->SetGid(gMC->VolId("S03G"));
1599    ((AliMUONChamber*)(*fChambers)[3])->SetGid(gMC->VolId("S04G"));
1600
1601    ((AliMUONChamber*)(*fChambers)[4])->SetGid(gMC->VolId("S05G"));
1602    ((AliMUONChamber*)(*fChambers)[5])->SetGid(gMC->VolId("S06G"));
1603
1604    ((AliMUONChamber*)(*fChambers)[6])->SetGid(gMC->VolId("S07G"));
1605    ((AliMUONChamber*)(*fChambers)[7])->SetGid(gMC->VolId("S08G"));
1606
1607    ((AliMUONChamber*)(*fChambers)[8])->SetGid(gMC->VolId("S09G"));
1608    ((AliMUONChamber*)(*fChambers)[9])->SetGid(gMC->VolId("S10G"));
1609
1610    ((AliMUONChamber*)(*fChambers)[10])->SetGid(gMC->VolId("SG1A"));
1611    ((AliMUONChamber*)(*fChambers)[11])->SetGid(gMC->VolId("SG2A"));
1612    ((AliMUONChamber*)(*fChambers)[12])->SetGid(gMC->VolId("SG3A"));
1613    ((AliMUONChamber*)(*fChambers)[13])->SetGid(gMC->VolId("SG4A"));
1614
1615    if(fDebug) printf("\n%s: Finished Init for version 1 - CPC chamber type\n",ClassName());
1616
1617    //cp
1618    if(fDebug) printf("\n%s: Start Init for Trigger Circuits\n",ClassName());
1619    for (i=0; i<AliMUONConstants::NTriggerCircuit(); i++) {
1620      ( (AliMUONTriggerCircuit*) (*fTriggerCircuits)[i])->Init(i);
1621    }
1622    if(fDebug) printf("%s: Finished Init for Trigger Circuits\n",ClassName());
1623    //cp
1624
1625 }
1626
1627 //_______________________________________________________________________________
1628 Int_t  AliMUONv1::GetChamberId(Int_t volId) const
1629 {
1630 // Check if the volume with specified  volId is a sensitive volume (gas)
1631 // of some chamber and returns the chamber number;
1632 // if not sensitive volume - return 0.
1633 // ---
1634
1635   for (Int_t i = 1; i <= AliMUONConstants::NCh(); i++)
1636     if (volId==((AliMUONChamber*)(*fChambers)[i-1])->GetGid()) return i;
1637
1638   return 0;
1639 }
1640 //_______________________________________________________________________________
1641 void AliMUONv1::StepManager()
1642 {
1643  if (fStepManagerVersionOld) {
1644     StepManagerOld();
1645     return;
1646   }
1647
1648   // Only charged tracks
1649   if( !(gMC->TrackCharge()) ) return;
1650   // Only charged tracks
1651
1652   // Only gas gap inside chamber
1653   // Tag chambers and record hits when track enters
1654   Int_t   idvol=-1;
1655   Int_t   iChamber=0;
1656   Int_t   id=0;
1657   Int_t   copy;
1658   const  Float_t kBig = 1.e10;
1659
1660   id=gMC->CurrentVolID(copy);
1661   // printf("id == %d \n",id);
1662   for (Int_t i = 1; i <= AliMUONConstants::NCh(); i++) {
1663     if(id==((AliMUONChamber*)(*fChambers)[i-1])->GetGid()) {
1664       iChamber = i;
1665       idvol  = i-1;
1666     }
1667   }
1668   if (idvol == -1) {
1669     return;
1670   }
1671
1672    if( gMC->IsTrackEntering() ) {
1673      Float_t theta = fTrackMomentum.Theta();
1674      if ( (theta>=10) ) gMC->SetMaxStep(fStepMaxInActiveGas);
1675    }
1676
1677 //  if (GetDebug()) {
1678 //     Float_t z = ( (AliMUONChamber*)(*fChambers)[idvol])->Z() ;
1679 //      Info("StepManager Step","Active volume found %d chamber %d Z chamber is %f ",idvol,iChamber, z);
1680 //   }
1681   // Particule id and mass,
1682   Int_t     ipart = gMC->TrackPid();
1683   Float_t   mass  = gMC->TrackMass();
1684
1685   fDestepSum[idvol]+=gMC->Edep();
1686   // Get current particle id (ipart), track position (pos)  and momentum (mom)
1687   if ( fStepSum[idvol]==0.0 )  gMC->TrackMomentum(fTrackMomentum);
1688   fStepSum[idvol]+=gMC->TrackStep();
1689
1690 //   if (GetDebug()) {
1691 //     Info("StepManager Step","iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g",
1692 //       iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg, mass, fStepSum[idvol], gMC->Edep());
1693 //     Info("StepManager Step","Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(), fTrackMomentum.Z()) ;
1694 //     gMC->TrackPosition(fTrackPosition);
1695 //     Info("StepManager Step","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
1696 //   }
1697
1698   // Track left chamber or StepSum larger than fStepMaxInActiveGas
1699   if ( gMC->IsTrackExiting() ||
1700        gMC->IsTrackStop() ||
1701        gMC->IsTrackDisappeared()||
1702        (fStepSum[idvol]>fStepMaxInActiveGas) ) {
1703
1704     if   ( gMC->IsTrackExiting() ||
1705            gMC->IsTrackStop() ||
1706            gMC->IsTrackDisappeared() ) gMC->SetMaxStep(kBig);
1707
1708     gMC->TrackPosition(fTrackPosition);
1709     Float_t theta = fTrackMomentum.Theta();
1710     Float_t phi   = fTrackMomentum.Phi();
1711
1712     TLorentzVector BackToWire( fStepSum[idvol]/2.*sin(theta)*cos(phi),
1713                                fStepSum[idvol]/2.*sin(theta)*sin(phi),
1714                                fStepSum[idvol]/2.*cos(theta),0.0       );
1715     //     if (GetDebug())
1716     //       Info("StepManager Exit","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
1717     //     if (GetDebug())
1718     //        Info("StepManager Exit ","Track BackToWire %f %f %f",BackToWire.X(),BackToWire.Y(),BackToWire.Z()) ;
1719     fTrackPosition-=BackToWire;
1720
1721     //-------------- Angle effect
1722     // Ratio between energy loss of particle and Mip as a function of BetaGamma of particle (Energy/Mass)
1723
1724     Float_t Beta_x_Gamma    = fTrackMomentum.P()/mass;//  pc/mc2
1725     Float_t SigmaEffect_10degrees;
1726     Float_t SigmaEffect_thetadegrees;
1727     Float_t ELossParticle_ELossMip;
1728     Float_t YAngleEffect=0.;
1729     Float_t theta_wires      =  TMath::Abs( TMath::ASin( TMath::Sin(theta) * TMath::Sin(phi) ) );
1730
1731     if ( (Beta_x_Gamma >3.2)   &&  (theta_wires*kRaddeg<=10) ) {
1732       Beta_x_Gamma=TMath::Log(Beta_x_Gamma);
1733       ELossParticle_ELossMip = fElossRatio->Eval(Beta_x_Gamma);
1734       // 10 degrees is a reference for a model (arbitrary)
1735       SigmaEffect_10degrees=fAngleEffect10->Eval(ELossParticle_ELossMip);// in micrometers
1736       // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
1737       SigmaEffect_thetadegrees =  SigmaEffect_10degrees/fAngleEffectNorma->Eval(theta_wires*kRaddeg);  // For 5mm gap
1738       if ( (iChamber==1)  ||  (iChamber==2) )
1739         SigmaEffect_thetadegrees/=(1.09833e+00+1.70000e-02*theta_wires*kRaddeg); // The gap is different (4mm)
1740       YAngleEffect=1.e-04*gRandom->Gaus(0,SigmaEffect_thetadegrees); // Error due to the angle effect in cm
1741     }
1742
1743
1744     // One hit per chamber
1745     GetMUONData()->AddHit(fIshunt, gAlice->GetCurrentTrackNumber(), iChamber, ipart,
1746                           fTrackPosition.X(), fTrackPosition.Y()+YAngleEffect, fTrackPosition.Z(), 0.0,
1747                           fTrackMomentum.P(),theta, phi, fStepSum[idvol], fDestepSum[idvol],
1748                           fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z());
1749 //     if (GetDebug()){
1750 //       Info("StepManager Exit","Particle exiting from chamber %d",iChamber);
1751 //       Info("StepManager Exit","StepSum %f eloss geant %g ",fStepSum[idvol],fDestepSum[idvol]);
1752 //       Info("StepManager Exit","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
1753 //     }
1754     fStepSum[idvol]  =0; // Reset for the next event
1755     fDestepSum[idvol]=0; // Reset for the next event
1756   }
1757 }
1758
1759 //___________________________________________
1760 void AliMUONv1::StepManagerOld()
1761 {
1762   Int_t          copy, id;
1763   static Int_t   idvol;
1764   static Int_t   vol[2];
1765   Int_t          ipart;
1766   TLorentzVector pos;
1767   TLorentzVector mom;
1768   Float_t        theta,phi;
1769   Float_t        destep, step;
1770
1771   static Float_t Sstep;
1772   static Float_t eloss, eloss2, xhit, yhit, zhit, tof, tlength;
1773   const  Float_t kBig = 1.e10;
1774   static Float_t hits[15];
1775
1776   TClonesArray &lhits = *fHits;
1777
1778   //
1779   //
1780   // Only charged tracks
1781   if( !(gMC->TrackCharge()) ) return;
1782   //
1783   // Only gas gap inside chamber
1784   // Tag chambers and record hits when track enters
1785   id=gMC->CurrentVolID(copy);
1786   vol[0] = GetChamberId(id);
1787   idvol = vol[0] -1;
1788
1789   if (idvol == -1) return;
1790
1791   //
1792   // Get current particle id (ipart), track position (pos)  and momentum (mom)
1793   gMC->TrackPosition(pos);
1794   gMC->TrackMomentum(mom);
1795
1796   ipart  = gMC->TrackPid();
1797
1798   //
1799   // momentum loss and steplength in last step
1800   destep = gMC->Edep();
1801   step   = gMC->TrackStep();
1802   // cout<<"------------"<<step<<endl;
1803   //
1804   // record hits when track enters ...
1805   if( gMC->IsTrackEntering()) {
1806
1807       gMC->SetMaxStep(fMaxStepGas);
1808       Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
1809       Double_t rt = TMath::Sqrt(tc);
1810       Double_t pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
1811       Double_t tx = mom[0]/pmom;
1812       Double_t ty = mom[1]/pmom;
1813       Double_t tz = mom[2]/pmom;
1814       Double_t s  = ((AliMUONChamber*)(*fChambers)[idvol])
1815           ->ResponseModel()
1816           ->Pitch()/tz;
1817       theta   = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
1818       phi     = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1819       hits[0] = Float_t(ipart);         // Geant3 particle type
1820       hits[1] = pos[0]+s*tx;            // X-position for hit
1821       hits[2] = pos[1]+s*ty;            // Y-position for hit
1822       hits[3] = pos[2]+s*tz;            // Z-position for hit
1823       hits[4] = theta;                  // theta angle of incidence
1824       hits[5] = phi;                    // phi angle of incidence
1825       hits[8] = 0;//PadHits does not exist anymore  (Float_t) fNPadHits;    // first padhit
1826       hits[9] = -1;                     // last pad hit
1827       hits[10] = mom[3];                // hit momentum P
1828       hits[11] = mom[0];                // Px
1829       hits[12] = mom[1];                // Py
1830       hits[13] = mom[2];                // Pz
1831       tof=gMC->TrackTime();
1832       hits[14] = tof;                   // Time of flight
1833       tlength  = 0;
1834       eloss    = 0;
1835       eloss2   = 0;
1836       Sstep=0;
1837       xhit     = pos[0];
1838       yhit     = pos[1];
1839       zhit     = pos[2];
1840       Chamber(idvol).ChargeCorrelationInit();
1841       // Only if not trigger chamber
1842
1843 //       printf("---------------------------\n");
1844 //       printf(">>>> Y =  %f \n",hits[2]);
1845 //       printf("---------------------------\n");
1846
1847
1848
1849      //  if(idvol < AliMUONConstants::NTrackingCh()) {
1850 //        //
1851 //        //  Initialize hit position (cursor) in the segmentation model
1852 //        ((AliMUONChamber*) (*fChambers)[idvol])
1853 //            ->SigGenInit(pos[0], pos[1], pos[2]);
1854 //       } else {
1855 //        //geant3->Gpcxyz();
1856 //        //printf("In the Trigger Chamber #%d\n",idvol-9);
1857 //       }
1858   }
1859   eloss2+=destep;
1860   Sstep+=step;
1861
1862   // cout<<Sstep<<endl;
1863
1864   //
1865   // Calculate the charge induced on a pad (disintegration) in case
1866   //
1867   // Mip left chamber ...
1868   if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1869       gMC->SetMaxStep(kBig);
1870       eloss   += destep;
1871       tlength += step;
1872
1873       Float_t x0,y0,z0;
1874       Float_t localPos[3];
1875       Float_t globalPos[3] = {pos[0], pos[1], pos[2]};
1876       gMC->Gmtod(globalPos,localPos,1);
1877
1878       if(idvol < AliMUONConstants::NTrackingCh()) {
1879 // tracking chambers
1880           x0 = 0.5*(xhit+pos[0]);
1881           y0 = 0.5*(yhit+pos[1]);
1882           z0 = 0.5*(zhit+pos[2]);
1883       } else {
1884 // trigger chambers
1885           x0 = xhit;
1886           y0 = yhit;
1887           z0 = 0.;
1888       }
1889
1890
1891       //      if (eloss >0)  MakePadHits(x0,y0,z0,eloss,tof,idvol);
1892
1893
1894       hits[6] = tlength;   // track length
1895       hits[7] = eloss2;    // de/dx energy loss
1896
1897
1898       //      if (fNPadHits > (Int_t)hits[8]) {
1899       //          hits[8] = hits[8]+1;
1900       //          hits[9] = 0: // PadHits does not exist anymore (Float_t) fNPadHits;
1901       //}
1902 //
1903 //    new hit
1904
1905       new(lhits[fNhits++])
1906           AliMUONHit(fIshunt, gAlice->GetCurrentTrackNumber(), vol,hits);
1907       eloss = 0;
1908       //
1909       // Check additional signal generation conditions
1910       // defined by the segmentation
1911       // model (boundary crossing conditions)
1912       // only for tracking chambers
1913   } else if
1914       ((idvol < AliMUONConstants::NTrackingCh()) &&
1915        ((AliMUONChamber*) (*fChambers)[idvol])->SigGenCond(pos[0], pos[1], pos[2]))
1916   {
1917       ((AliMUONChamber*) (*fChambers)[idvol])
1918           ->SigGenInit(pos[0], pos[1], pos[2]);
1919
1920       Float_t localPos[3];
1921       Float_t globalPos[3] = {pos[0], pos[1], pos[2]};
1922       gMC->Gmtod(globalPos,localPos,1);
1923
1924       eloss    += destep;
1925
1926       // if (eloss > 0 && idvol < AliMUONConstants::NTrackingCh())
1927       //        MakePadHits(0.5*(xhit+pos[0]),0.5*(yhit+pos[1]),pos[2],eloss,tof,idvol);
1928       xhit     = pos[0];
1929       yhit     = pos[1];
1930       zhit     = pos[2];
1931       eloss = 0;
1932       tlength += step ;
1933       //
1934       // nothing special  happened, add up energy loss
1935   } else {
1936       eloss   += destep;
1937       tlength += step ;
1938   }
1939 }
1940
1941