VZERO/AliVZEROv5.cxx

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   3  *                                                                        *
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  15
  16 /* $Id$ */
  17
  18 //////////////////////////////////////////////////////////////////////
  19 //                                                                  //
  20 //  (V-zero) detector  version 5  as designed by the Lyon group     //
  21 //   All comments should be sent to Brigitte CHEYNIS :              //
  22 //                                  b.cheynis@ipnl.in2p3.fr         //
  23 //   Geometry of the  16 th of june 2004                            //
  24 //  (now 8 sectors instead of 12 sectors as in previous version)    //
  25 //   V0R (now V0C) sits between Z values  -89.6 and  -84.9 cm       //
  26 //   V0L (now V0A) sits between Z values +339.0 and +341.0 cm       //
  27 //   New coordinate system has been implemented in october 2003     //
  28 //                                                                  //
  29 //////////////////////////////////////////////////////////////////////
  30
  31 // --- Standard libraries ---
  32 #include <Riostream.h>
  33 #include <stdlib.h>
  34 #include <string.h>
  35
  36 // --- ROOT libraries ---
  37 #include <TClonesArray.h>
  38 #include <TLorentzVector.h>
  39 #include <TMath.h>
  40 #include <TObjectTable.h>
  41 #include <TVirtualMC.h>
  42 #include <TParticle.h>
  43
  44 // --- AliRoot header files ---
  45 #include "AliRun.h"
  46 #include "AliMC.h"
  47 #include "AliConst.h"
  48 #include "AliMagF.h"
  49 #include "AliVZEROLoader.h"
  50 #include "AliVZEROdigit.h"
  51 #include "AliVZEROhit.h"
  52 #include "AliVZEROv5.h"
  53 #include "AliLog.h"
  54
  55 ClassImp(AliVZEROv5)
  56
  57 //_____________________________________________________________________________
  58 AliVZEROv5:: AliVZEROv5():AliVZERO(),
  59    fCellId(0),
  60    fTrackPosition(),
  61    fTrackMomentum(),
  62    fLightYield(93.75),
  63    fLightAttenuation(0.05),
  64    fnMeters(15.0),
  65    fFibToPhot(0.3)
  66 {
  67 // Standard default constructor
  68 }
  69
  70 //_____________________________________________________________________________
  71 AliVZEROv5::AliVZEROv5(const char *name, const char *title):
  72    AliVZERO(name,title),
  73    fCellId(0),
  74    fTrackPosition(),
  75    fTrackMomentum(),
  76    fLightYield(93.75),
  77    fLightAttenuation(0.05),
  78    fnMeters(15.0),
  79    fFibToPhot(0.3)
  80 {
  81
  82 // Standard constructor for V-zero Detector  version 5
  83
  84   AliDebug(2,"Create VZERO object ");
  85 //
  86 //   fLightYield              =  93.75; // Light yield in BC408 (93.75 eV per photon)
  87 //   fLightAttenuation        =   0.05; // Light attenuation in fiber (0.05 per meter)
  88 //   fnMeters                 =   15.0; // Number of meters of clear fibers to PM
  89 //   fFibToPhot               =    0.3; // Attenuation at fiber-photocathode interface
  90 }
  91
  92 //_____________________________________________________________________________
  93 void AliVZEROv5::CreateGeometry()
  94 {
  95
  96 // Creates the GEANT geometry of the V-zero Detector  version 5
  97
  98   AliDebug(2,"Create Geometry ");
  99
 100   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 101
 102   Int_t    ndetR = 1;
 103   Int_t    ndetL = 1;
 104
 105   Int_t    ncellsR = 1;
 106   Int_t    ncellsL = 1;
 107
 108   Int_t    idrotm[999];
 109
 110   Float_t  height1Right, height2Right, height3Right, height4Right;
 111   Float_t  heightRight;
 112   Float_t  theta;
 113
 114   Float_t  halfThickQua;
 115
 116   Float_t  zdet;
 117   Float_t  r0Right, r4Right, rBoxRight;
 118   Float_t  pi = TMath::Pi();
 119
 120   height1Right    =     2.6;  // height of cell 1, in cm
 121   height2Right    =     4.6;  // height of cell 2, in cm
 122   height3Right    =     7.6;  // height of cell 3, in cm
 123   height4Right    =    12.7;  // height of cell 4, in cm
 124
 125   theta       = pi/4.0/2.0;       // half angular opening = 22.5 degrees
 126
 127   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 128
 129 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 130 // absorber nose sitting at 90 cm. Will use -zdet later...
 131 // size of V0R box (fThickness) is increased by 3 mm as compared to basic version
 132
 133   fThickness  =    fThickness + 0.3;             // now 4.7 cm instead of 4.4 cm
 134   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 135   r0Right     =    4.20;          // closest distance to center of the beam pipe
 136   heightRight =    height1Right + height2Right + height3Right + height4Right;
 137   r4Right     =    r0Right + heightRight + 0.3;
 138   rBoxRight   =    38.0;          // external radius of right box
 139
 140 // Creation of mother volume v0LE - left part - :
 141 // Entrance face at  +339.0 cm  (new coordinate system) ...
 142
 143    Float_t   partube[3];
 144
 145    partube[0] =  4.3;
 146    partube[1] = 44.0;
 147    partube[2] = fThickness1/2.0;
 148
 149    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 150
 151 // Creation of five rings - left part - :
 152 // Entrance face at +339.0 cm  (new coordinate system) ...
 153
 154 // Mother volume v0L0 in which will be set 5 scintillator cells
 155
 156   Float_t   partubs[5];
 157
 158   Float_t   r0Left      =   4.3;
 159   Float_t   height1Left =   3.3;
 160   Float_t   height2Left =   6.2;
 161   Float_t   height3Left =   8.9;
 162   Float_t   height4Left =  20.9;
 163   Float_t   heightLeft  =   height1Left + height2Left + height3Left + height4Left;
 164
 165   Float_t   r4Left      =   r0Left  + heightLeft;
 166
 167   partubs[0]     =  r0Left;
 168   partubs[1]     =  r4Left;
 169   partubs[2]     =  fThickness1/2.0;
 170   partubs[3]     =  90.0-22.5;
 171   partubs[4]     = 135.0-22.5;
 172
 173   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 174
 175   Float_t  r1Left =  r0Left + height1Left;
 176
 177   partubs[0]     =  r0Left;
 178   partubs[1]     =  r1Left;
 179
 180   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 181   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 182
 183   Float_t  r2Left  =  r1Left + height2Left;
 184
 185   partubs[0]     =  r1Left;
 186   partubs[1]     =  r2Left;
 187
 188   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 189   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 190
 191   Float_t  r3Left  =  r2Left + height3Left;
 192
 193   partubs[0]     =  r2Left;
 194   partubs[1]     =  r3Left;
 195
 196   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 197   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 198
 199   partubs[0]     =  r3Left;
 200   partubs[1]     =  r4Left;
 201
 202   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 203   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 204
 205 // Creation of mother volume v0RI - right part - :
 206
 207   partube[0] = r0Right - 0.2;
 208   partube[1] = r4Right + 1.0;
 209   partube[2] = fThickness/2.0;
 210
 211   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 212
 213 // Creation of  carbon lids (3.0 mm thick) to keep v0RI box shut...
 214
 215   Float_t  lidThickness = 0.30;
 216
 217   partube[0] =   r0Right;
 218   partube[1] =   rBoxRight;
 219   partube[2] =   +lidThickness/2.0;
 220
 221   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 222   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 223   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 224
 225 // Creation of aluminum rings 3.0 mm thick to maintain the v0RI pieces ...
 226
 227   partube[0] =   r0Right;
 228   partube[1] =   r0Right + 0.3;
 229   partube[2] =   +fThickness/2.0;
 230
 231   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 232   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 233
 234   partube[0] =   rBoxRight - 0.3;
 235   partube[1] =   rBoxRight;
 236   partube[2] =   +fThickness/2.0;
 237
 238   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 239   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 240
 241 // Mother volume v0R0 in which will be set 6 scintillator cells
 242
 243   partubs[0]      =  r0Right;
 244   partubs[1]      =  r4Right;
 245   partubs[2]      =  fThickness/2.0;
 246   partubs[3]      =  90.0-22.5;
 247   partubs[4]      = 135.0-22.5;
 248
 249   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 250
 251 // Elementary cell of ring 1 :
 252 // (cells of ring 1 will be shifted by 2.0 cm backwards to output fibers)
 253
 254   Float_t   offsetFibers  =  1.0;
 255   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 256   Float_t   r1Right       =  r0Right + 0.3 + height1Right;
 257
 258   partubs[0]     =  r0Right + 0.3;
 259   partubs[1]     =  r1Right;
 260   partubs[2]     =  fThickness1/2.0;
 261
 262   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 263   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 264
 265 // Elementary cell of ring 2 :
 266 // (cells of ring 2 will be shifted by 1.0 cm backwards to output fibers)
 267
 268   Float_t   r2Right   =  r1Right + height2Right;
 269
 270   partubs[0]     =  r1Right;
 271   partubs[1]     =  r2Right;
 272
 273   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 274   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 275
 276 // Elementary cell of ring 3 :
 277
 278   Float_t   r3Right   =  r2Right + height3Right;
 279
 280   partubs[0]     =  r2Right;
 281   partubs[1]     =  r3Right;
 282   partubs[3]     =  90.0-22.5;
 283   partubs[4]     = 112.5-22.5;
 284
 285   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 286   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 287
 288   partubs[3]     = 112.5-22.5;
 289   partubs[4]     = 135.0-22.5;
 290   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 291   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 292
 293 // Elementary cell of ring 4 :
 294
 295   partubs[0]     =  r3Right;
 296   partubs[1]     =  r4Right;
 297   partubs[3]     =  90.0-22.5;
 298   partubs[4]     = 112.5-22.5;
 299
 300   gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 301   gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 302
 303   partubs[3]     = 112.5-22.5;
 304   partubs[4]     = 135.0-22.5;
 305   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 306   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 307
 308   Float_t  phiDeg = 180./4.;
 309
 310 // Right part :
 311
 312   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 313       {
 314         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 315         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 316                           0.0,0.0,idrotm[902],"ONLY");
 317         ndetR++;
 318        }
 319
 320   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 321
 322   ncellsR = (ndetR - 1) * 6;
 323   AliInfo(Form("Number of cells on Right side =   %d\n",  ncellsR));
 324
 325 // Left part :
 326
 327   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 328       {
 329         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 330         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 331                           0.0,0.0,idrotm[902],"ONLY");
 332         ndetL++;
 333        }
 334
 335   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,339.0+fThickness1/2.0,0,"ONLY");
 336
 337   ncellsL = (ndetL - 1) * 4;
 338   AliInfo(Form("Number of cells on Left side  =   %d\n",  ncellsL));
 339
 340 }
 341
 342 //_____________________________________________________________________________
 343 void AliVZEROv5::CreateMaterials()
 344 {
 345
 346 // Creates materials used for geometry
 347
 348     AliDebug(2,"Create materials");
 349
 350 /*
 351     Float_t ppckov[14] = { 5.5e-9, 5.7e-9, 5.9e-9, 6.1e-9, 6.3e-9, 6.5e-9, 6.7e-9,
 352                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 353
 354
 355     Float_t ppckov_alu[14] = { 5.5e-9, 5.7e-9, 5.9e-9, 6.1e-9, 6.3e-9, 6.5e-9, 6.7e-9,
 356                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 357
 358     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 359                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 360                                  1.662295, 1.68337 };
 361
 362     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 363                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 364
 365     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 366
 367
 368     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 369
 370
 371     Float_t absco_alu[14]  = { 1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,
 372                                1e-4,1e-4,1e-4,1e-4 };
 373     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 374
 375 */
 376
 377     Int_t *idtmed = fIdtmed->GetArray()-2999;
 378
 379
 380 //  Parameters related to Quarz (SiO2) :
 381
 382     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 383     Int_t nlmatqua;
 384
 385     aqua[0]    = 28.09;
 386     aqua[1]    = 16.;
 387     zqua[0]    = 14.;
 388     zqua[1]    = 8.;
 389     densqua    = 2.64;
 390     nlmatqua   = -2;
 391     wmatqua[0] = 1.;
 392     wmatqua[1] = 2.;
 393
 394 // Parameters  related to aluminum sheets :
 395
 396     Float_t  aal   = 26.98;
 397     Float_t  zal   = 13.00;
 398     Float_t  densal=   2.7;
 399     Float_t  radlal=   8.9;
 400
 401 // Parameters  related to scintillator CH :
 402
 403     Float_t ascin[2] = {1.00794,12.011};
 404     Float_t zscin[2] = {1.,6.};
 405     Float_t wscin[2] = {1.,1.};
 406     Float_t denscin  = 1.032;
 407
 408 // AIR
 409
 410     Float_t aAir[4]={12.,14.,16.,36.};
 411     Float_t zAir[4]={6.,7.,8.,18.};
 412     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 413     Float_t dAir = 1.20479E-3;
 414
 415 //  Definition of materials :
 416
 417     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 418     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 419     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 420     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 421     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 422     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 423
 424     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 425
 426
 427     Int_t   iSXFLD = gAlice->Field()->Integ();
 428     Float_t sXMGMX = gAlice->Field()->Max();
 429
 430     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 431
 432     tmaxfd = 10.;
 433     stemax = 0.1;
 434     deemax = 0.1;
 435     epsil  = 0.001;
 436     stmin  = 0.001;
 437
 438 //  Active Air :
 439     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 440               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 441
 442 //  Inactive air :
 443
 444     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 445               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 446
 447     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 448               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 449
 450     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 451               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 452
 453     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 454               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 455
 456
 457     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 458               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 459
 460     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 461
 462     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 463     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 464     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 465     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 466
 467     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 468     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 469     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 470     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 471
 472     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 473     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 474     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 475     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 476     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 477     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 478
 479     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 480     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 481     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 482     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 483
 484     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 485     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 486     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 487     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 488     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 489     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 490
 491     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 492     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 493     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 494     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 495     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 496     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 497
 498
 499 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 500 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 501
 502 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 503 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 504
 505 }
 506
 507 //_____________________________________________________________________________
 508 void AliVZEROv5::DrawModule() const
 509 {
 510
 511 //  Drawing is done in DrawVZERO.C
 512
 513    AliDebug(2,"DrawModule");
 514 }
 515
 516 //_____________________________________________________________________________
 517 void AliVZEROv5::Init()
 518 {
 519 // Initialises version 2 of the VZERO Detector
 520 // Just prints an information message
 521
 522    AliInfo(Form("VZERO version %d initialized \n",IsVersion()));
 523
 524 //   gMC->SetMaxStep(fMaxStepAlu);
 525 //   gMC->SetMaxStep(fMaxStepQua);
 526
 527     AliVZERO::Init();
 528 }
 529
 530 //_____________________________________________________________________________
 531 void AliVZEROv5::StepManager()
 532 {
 533
 534 // Step Manager, called at each step
 535
 536      Int_t     copy;
 537      static    Int_t   vol[4];
 538      static    Float_t hits[21];
 539      static    Float_t eloss, tlength;
 540      static    Int_t   nPhotonsInStep;
 541      static    Int_t   nPhotons;
 542      static    Int_t   numStep;
 543      Float_t   ringNumber;
 544      Float_t   destep, step;
 545
 546      numStep += 1;
 547
 548 //   We keep only charged tracks :
 549
 550      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 551
 552      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 553      vol[2]    = gMC->CurrentVolID(copy);
 554      vol[3]    = copy;
 555
 556      static Int_t idV0R1 = gMC->VolId("V0R1");
 557      static Int_t idV0L1 = gMC->VolId("V0L1");
 558      static Int_t idV0R2 = gMC->VolId("V0R2");
 559      static Int_t idV0L2 = gMC->VolId("V0L2");
 560      static Int_t idV0R3 = gMC->VolId("V0R3");
 561      static Int_t idV0L3 = gMC->VolId("V0L3");
 562      static Int_t idV0R4 = gMC->VolId("V0R4");
 563      static Int_t idV0L4 = gMC->VolId("V0L4");
 564      static Int_t idV0R5 = gMC->VolId("V0R5");
 565      static Int_t idV0R6 = gMC->VolId("V0R6");
 566
 567      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 568                gMC->CurrentVolID(copy) == idV0L1 )
 569                ringNumber = 1.0;
 570      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 571                gMC->CurrentVolID(copy) == idV0L2 )
 572                ringNumber = 2.0;
 573      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 574                gMC->CurrentVolID(copy) == idV0R4 ||
 575                gMC->CurrentVolID(copy) == idV0L3 )
 576                ringNumber = 3.0;
 577      else if ( gMC->CurrentVolID(copy) == idV0R5 ||
 578                gMC->CurrentVolID(copy) == idV0R6 ||
 579                gMC->CurrentVolID(copy) == idV0L4 )
 580                ringNumber = 4.0;
 581      else
 582                ringNumber = 0.0;
 583
 584      if  (  ringNumber > 0.5  ) {
 585
 586         destep    = gMC->Edep();
 587         step      = gMC->TrackStep();
 588
 589         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 590         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 591
 592         eloss    += destep;
 593         tlength  += step;
 594
 595         if  ( gMC->IsTrackEntering()  )  {
 596
 597             nPhotons  =  nPhotonsInStep;
 598             gMC->TrackPosition(fTrackPosition);
 599             gMC->TrackMomentum(fTrackMomentum);
 600
 601             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 602                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 603
 604             hits[0]  = fTrackPosition.X();
 605             hits[1]  = fTrackPosition.Y();
 606             hits[2]  = fTrackPosition.Z();
 607             hits[3]  = Float_t (gMC->TrackPid());
 608
 609             hits[4]  = gMC->TrackTime();
 610             hits[5]  = gMC->TrackCharge();
 611             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 612             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 613             hits[8]  = ringNumber;
 614
 615             hits[9]  = pt;
 616             hits[10] = fTrackMomentum.P();
 617             hits[11] = fTrackMomentum.Px();
 618             hits[12] = fTrackMomentum.Py();
 619             hits[13] = fTrackMomentum.Pz();
 620
 621             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 622             hits[14] = par->Vx();
 623             hits[15] = par->Vy();
 624             hits[16] = par->Vz();
 625
 626             tlength  = 0.0;
 627             eloss    = 0.0;
 628          }
 629
 630          nPhotons  = nPhotons + nPhotonsInStep;
 631
 632          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 633
 634          nPhotons  = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
 635          nPhotons  = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
 636
 637          hits[17] =   eloss;
 638          hits[18] = tlength;
 639          hits[19] = nPhotons;
 640          hits[20] = GetCellId (vol, hits);
 641
 642          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 643
 644          tlength         = 0.0;
 645          eloss           = 0.0;
 646          nPhotons        =   0;
 647          nPhotonsInStep  =   0;
 648
 649          numStep         =   0;
 650          }
 651     }
 652
 653 }
 654
 655 //_____________________________________________________________________________
 656 void AliVZEROv5::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 657 {
 658
 659 //  Adds a VZERO hit
 660
 661   TClonesArray &lhits = *fHits;
 662   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 663 }
 664
 665 //_____________________________________________________________________________
 666 void AliVZEROv5::AddDigits(Int_t *tracks, Int_t* digits)
 667 {
 668
 669 //  Adds a VZERO digit
 670
 671    TClonesArray  &ldigits = *fDigits;
 672    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 673 }
 674
 675 //_____________________________________________________________________________
 676 void AliVZEROv5::MakeBranch(Option_t *option)
 677 {
 678
 679 // Creates new branches in the current Root Tree
 680
 681   char branchname[10];
 682   sprintf(branchname,"%s",GetName());
 683   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
 684
 685   const char *cH = strstr(option,"H");
 686
 687   if (fHits   && fLoader->TreeH() && cH) {
 688     fLoader->TreeH()->Branch(branchname,&fHits, fBufferSize);
 689     AliDebug(2,Form("Making Branch %s for hits",branchname));
 690   }
 691
 692   const char *cD = strstr(option,"D");
 693
 694   if (fDigits   && fLoader->TreeD() && cD) {
 695     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 696     AliDebug(2,Form("Making Branch %s for digits",branchname));
 697   }
 698
 699 }
 700
 701 //_____________________________________________________________________________
 702 Int_t AliVZEROv5::GetCellId(Int_t *vol, Float_t *hits)
 703 {
 704
 705   //   Returns Id of scintillator cell
 706   //   Right side from  0 to 47
 707   //   Left  side from 48 to 95
 708
 709   //   hits[8] = ring number (1 to 4)
 710   //   vol[1]  = copy number (1 to 8)
 711
 712    Int_t index      = vol[1];
 713    Int_t RingNumber = Int_t(hits[8]);
 714    fCellId          = 0;
 715
 716 //    cout << "volID = " << vol[0] << "  copy = " << vol[1] << endl;
 717 //    cout << "X     = " << hits[0] << "    Y = " << hits[1] << endl;
 718
 719    Float_t phi = Float_t(TMath::ATan2(Double_t(hits[1]),Double_t(hits[0])) );
 720    phi = kRaddeg * phi;
 721
 722    if (index < 7) index = index + 8;
 723
 724    if (hits[2] < 0.0) {
 725       if(RingNumber < 3) {
 726          index = (index - 7) + ( ( RingNumber - 1 ) * 8);}
 727       else if(RingNumber >= 3){
 728        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R3")||
 729           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R5") )
 730          {index = (index*2 - 14) + ( ( RingNumber - 2 ) * 16); }
 731        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R4")||
 732           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R6") )
 733          {index = (index*2 - 13) + ( ( RingNumber - 2 ) * 16); }
 734       }
 735       fCellId   = index;
 736    }
 737
 738    else if (hits[2] > 0.0){
 739       index = (index - 7 + 48) + ( ( RingNumber - 1 ) * 8);
 740       fCellId   = index;}
 741
 742 //    cout << " ring   = " << RingNumber << " phi = "<<  phi << endl;
 743 //    cout << " cellID = " << fCellId <<  endl;
 744 //    cout <<  "**********" << endl;
 745
 746    return fCellId;
 747
 748
 749 }