VZERO/AliVZEROv5.cxx

   1 /**************************************************************************
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   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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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 <TGeoGlobalMagField.h>
  39 #include <TLorentzVector.h>
  40 #include <TMath.h>
  41 #include <TObjectTable.h>
  42 #include <TParticle.h>
  43 #include <TVirtualMC.h>
  44
  45 // --- AliRoot header files ---
  46 #include "AliRun.h"
  47 #include "AliMC.h"
  48 #include "AliConst.h"
  49 #include "AliMagF.h"
  50 #include "AliVZEROLoader.h"
  51 #include "AliVZEROdigit.h"
  52 #include "AliVZEROhit.h"
  53 #include "AliVZEROv5.h"
  54 #include "AliLog.h"
  55
  56 ClassImp(AliVZEROv5)
  57
  58 //_____________________________________________________________________________
  59 AliVZEROv5:: AliVZEROv5():AliVZERO(),
  60    fCellId(0),
  61    fTrackPosition(),
  62    fTrackMomentum(),
  63    fLightYield(93.75),
  64    fLightAttenuation(0.05),
  65    fnMeters(15.0),
  66    fFibToPhot(0.3)
  67 {
  68 // Standard default constructor
  69 }
  70
  71 //_____________________________________________________________________________
  72 AliVZEROv5::AliVZEROv5(const char *name, const char *title):
  73    AliVZERO(name,title),
  74    fCellId(0),
  75    fTrackPosition(),
  76    fTrackMomentum(),
  77    fLightYield(93.75),
  78    fLightAttenuation(0.05),
  79    fnMeters(15.0),
  80    fFibToPhot(0.3)
  81 {
  82
  83 // Standard constructor for V-zero Detector  version 5
  84
  85   AliDebug(2,"Create VZERO object ");
  86 //
  87 //   fLightYield              =  93.75; // Light yield in BC408 (93.75 eV per photon)
  88 //   fLightAttenuation        =   0.05; // Light attenuation in fiber (0.05 per meter)
  89 //   fnMeters                 =   15.0; // Number of meters of clear fibers to PM
  90 //   fFibToPhot               =    0.3; // Attenuation at fiber-photocathode interface
  91 }
  92
  93 //_____________________________________________________________________________
  94 void AliVZEROv5::CreateGeometry()
  95 {
  96
  97 // Creates the GEANT geometry of the V-zero Detector  version 5
  98
  99   AliDebug(2,"Create Geometry ");
 100
 101   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 102
 103   Int_t    ndetR = 1;
 104   Int_t    ndetL = 1;
 105
 106   Int_t    ncellsR = 1;
 107   Int_t    ncellsL = 1;
 108
 109   Int_t    idrotm[999];
 110
 111   Float_t  height1Right, height2Right, height3Right, height4Right;
 112   Float_t  heightRight;
 113   Float_t  theta;
 114
 115   Float_t  halfThickQua;
 116
 117   Float_t  zdet;
 118   Float_t  r0Right, r4Right, rBoxRight;
 119   Float_t  pi = TMath::Pi();
 120
 121   height1Right    =     2.6;  // height of cell 1, in cm
 122   height2Right    =     4.6;  // height of cell 2, in cm
 123   height3Right    =     7.6;  // height of cell 3, in cm
 124   height4Right    =    12.7;  // height of cell 4, in cm
 125
 126   theta       = pi/4.0/2.0;       // half angular opening = 22.5 degrees
 127
 128   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 129
 130 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 131 // absorber nose sitting at 90 cm. Will use -zdet later...
 132 // size of V0R box (fThickness) is increased by 3 mm as compared to basic version
 133
 134   fThickness  =    fThickness + 0.3;             // now 4.7 cm instead of 4.4 cm
 135   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 136   r0Right     =    4.20;          // closest distance to center of the beam pipe
 137   heightRight =    height1Right + height2Right + height3Right + height4Right;
 138   r4Right     =    r0Right + heightRight + 0.3;
 139   rBoxRight   =    38.0;          // external radius of right box
 140
 141 // Creation of mother volume v0LE - left part - :
 142 // Entrance face at  +339.0 cm  (new coordinate system) ...
 143
 144    Float_t   partube[3];
 145
 146    partube[0] =  4.3;
 147    partube[1] = 44.0;
 148    partube[2] = fThickness1/2.0;
 149
 150    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 151
 152 // Creation of five rings - left part - :
 153 // Entrance face at +339.0 cm  (new coordinate system) ...
 154
 155 // Mother volume v0L0 in which will be set 5 scintillator cells
 156
 157   Float_t   partubs[5];
 158
 159   Float_t   r0Left      =   4.3;
 160   Float_t   height1Left =   3.3;
 161   Float_t   height2Left =   6.2;
 162   Float_t   height3Left =   8.9;
 163   Float_t   height4Left =  20.9;
 164   Float_t   heightLeft  =   height1Left + height2Left + height3Left + height4Left;
 165
 166   Float_t   r4Left      =   r0Left  + heightLeft;
 167
 168   partubs[0]     =  r0Left;
 169   partubs[1]     =  r4Left;
 170   partubs[2]     =  fThickness1/2.0;
 171   partubs[3]     =  90.0-22.5;
 172   partubs[4]     = 135.0-22.5;
 173
 174   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 175
 176   Float_t  r1Left =  r0Left + height1Left;
 177
 178   partubs[0]     =  r0Left;
 179   partubs[1]     =  r1Left;
 180
 181   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 182   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 183
 184   Float_t  r2Left  =  r1Left + height2Left;
 185
 186   partubs[0]     =  r1Left;
 187   partubs[1]     =  r2Left;
 188
 189   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 190   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 191
 192   Float_t  r3Left  =  r2Left + height3Left;
 193
 194   partubs[0]     =  r2Left;
 195   partubs[1]     =  r3Left;
 196
 197   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 198   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 199
 200   partubs[0]     =  r3Left;
 201   partubs[1]     =  r4Left;
 202
 203   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 204   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 205
 206 // Creation of mother volume v0RI - right part - :
 207
 208   partube[0] = r0Right - 0.2;
 209   partube[1] = r4Right + 1.0;
 210   partube[2] = fThickness/2.0;
 211
 212   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 213
 214 // Creation of  carbon lids (3.0 mm thick) to keep v0RI box shut...
 215
 216   Float_t  lidThickness = 0.30;
 217
 218   partube[0] =   r0Right;
 219   partube[1] =   rBoxRight;
 220   partube[2] =   +lidThickness/2.0;
 221
 222   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 223   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 224   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 225
 226 // Creation of aluminum rings 3.0 mm thick to maintain the v0RI pieces ...
 227
 228   partube[0] =   r0Right;
 229   partube[1] =   r0Right + 0.3;
 230   partube[2] =   +fThickness/2.0;
 231
 232   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 233   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 234
 235   partube[0] =   rBoxRight - 0.3;
 236   partube[1] =   rBoxRight;
 237   partube[2] =   +fThickness/2.0;
 238
 239   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 240   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 241
 242 // Mother volume v0R0 in which will be set 6 scintillator cells
 243
 244   partubs[0]      =  r0Right;
 245   partubs[1]      =  r4Right;
 246   partubs[2]      =  fThickness/2.0;
 247   partubs[3]      =  90.0-22.5;
 248   partubs[4]      = 135.0-22.5;
 249
 250   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 251
 252 // Elementary cell of ring 1 :
 253 // (cells of ring 1 will be shifted by 2.0 cm backwards to output fibers)
 254
 255   Float_t   offsetFibers  =  1.0;
 256   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 257   Float_t   r1Right       =  r0Right + 0.3 + height1Right;
 258
 259   partubs[0]     =  r0Right + 0.3;
 260   partubs[1]     =  r1Right;
 261   partubs[2]     =  fThickness1/2.0;
 262
 263   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 264   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 265
 266 // Elementary cell of ring 2 :
 267 // (cells of ring 2 will be shifted by 1.0 cm backwards to output fibers)
 268
 269   Float_t   r2Right   =  r1Right + height2Right;
 270
 271   partubs[0]     =  r1Right;
 272   partubs[1]     =  r2Right;
 273
 274   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 275   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 276
 277 // Elementary cell of ring 3 :
 278
 279   Float_t   r3Right   =  r2Right + height3Right;
 280
 281   partubs[0]     =  r2Right;
 282   partubs[1]     =  r3Right;
 283   partubs[3]     =  90.0-22.5;
 284   partubs[4]     = 112.5-22.5;
 285
 286   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 287   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 288
 289   partubs[3]     = 112.5-22.5;
 290   partubs[4]     = 135.0-22.5;
 291   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 292   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 293
 294 // Elementary cell of ring 4 :
 295
 296   partubs[0]     =  r3Right;
 297   partubs[1]     =  r4Right;
 298   partubs[3]     =  90.0-22.5;
 299   partubs[4]     = 112.5-22.5;
 300
 301   gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 302   gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 303
 304   partubs[3]     = 112.5-22.5;
 305   partubs[4]     = 135.0-22.5;
 306   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 307   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 308
 309   Float_t  phiDeg = 180./4.;
 310
 311 // Right part :
 312
 313   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 314       {
 315         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 316         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 317                           0.0,0.0,idrotm[902],"ONLY");
 318         ndetR++;
 319        }
 320
 321   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 322
 323   ncellsR = (ndetR - 1) * 6;
 324   AliInfo(Form("Number of cells on Right side =   %d\n",  ncellsR));
 325
 326 // Left part :
 327
 328   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 329       {
 330         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 331         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 332                           0.0,0.0,idrotm[902],"ONLY");
 333         ndetL++;
 334        }
 335
 336   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,339.0+fThickness1/2.0,0,"ONLY");
 337
 338   ncellsL = (ndetL - 1) * 4;
 339   AliInfo(Form("Number of cells on Left side  =   %d\n",  ncellsL));
 340
 341 }
 342
 343 //_____________________________________________________________________________
 344 void AliVZEROv5::CreateMaterials()
 345 {
 346
 347 // Creates materials used for geometry
 348
 349     AliDebug(2,"Create materials");
 350
 351 /*
 352     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,
 353                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 354
 355
 356     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,
 357                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 358
 359     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 360                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 361                                  1.662295, 1.68337 };
 362
 363     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 364                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 365
 366     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 367
 368
 369     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 370
 371
 372     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,
 373                                1e-4,1e-4,1e-4,1e-4 };
 374     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 375
 376 */
 377
 378     Int_t *idtmed = fIdtmed->GetArray()-2999;
 379
 380
 381 //  Parameters related to Quarz (SiO2) :
 382
 383     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 384     Int_t nlmatqua;
 385
 386     aqua[0]    = 28.09;
 387     aqua[1]    = 16.;
 388     zqua[0]    = 14.;
 389     zqua[1]    = 8.;
 390     densqua    = 2.64;
 391     nlmatqua   = -2;
 392     wmatqua[0] = 1.;
 393     wmatqua[1] = 2.;
 394
 395 // Parameters  related to aluminum sheets :
 396
 397     Float_t  aal   = 26.98;
 398     Float_t  zal   = 13.00;
 399     Float_t  densal=   2.7;
 400     Float_t  radlal=   8.9;
 401
 402 // Parameters  related to scintillator CH :
 403
 404     Float_t ascin[2] = {1.00794,12.011};
 405     Float_t zscin[2] = {1.,6.};
 406     Float_t wscin[2] = {1.,1.};
 407     Float_t denscin  = 1.032;
 408
 409 // AIR
 410
 411     Float_t aAir[4]={12.,14.,16.,36.};
 412     Float_t zAir[4]={6.,7.,8.,18.};
 413     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 414     Float_t dAir = 1.20479E-3;
 415
 416 //  Definition of materials :
 417
 418     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 419     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 420     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 421     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 422     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 423     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 424
 425     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 426
 427
 428     Int_t   iSXFLD = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Integ();     // Field type
 429     Float_t sXMGMX = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Max();       // Field max.
 430
 431     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 432
 433     tmaxfd = 10.;
 434     stemax = 0.1;
 435     deemax = 0.1;
 436     epsil  = 0.001;
 437     stmin  = 0.001;
 438
 439 //  Active Air :
 440     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 441               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 442
 443 //  Inactive air :
 444
 445     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 446               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 447
 448     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 449               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 450
 451     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 452               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 453
 454     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 455               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 456
 457
 458     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 459               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 460
 461     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 462
 463     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 464     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 465     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 466     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 467
 468     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 469     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 470     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 471     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 472
 473     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 474     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 475     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 476     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 477     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 478     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 479
 480     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 481     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 482     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 483     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 484
 485     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 486     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 487     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 488     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 489     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 490     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 491
 492     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 493     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 494     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 495     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 496     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 497     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 498
 499
 500 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 501 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 502
 503 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 504 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 505
 506 }
 507
 508 //_____________________________________________________________________________
 509 void AliVZEROv5::DrawModule() const
 510 {
 511
 512 //  Drawing is done in DrawVZERO.C
 513
 514    AliDebug(2,"DrawModule");
 515 }
 516
 517 //_____________________________________________________________________________
 518 void AliVZEROv5::Init()
 519 {
 520 // Initialises version 2 of the VZERO Detector
 521 // Just prints an information message
 522
 523    AliInfo(Form("VZERO version %d initialized \n",IsVersion()));
 524
 525 //   gMC->SetMaxStep(fMaxStepAlu);
 526 //   gMC->SetMaxStep(fMaxStepQua);
 527
 528     AliVZERO::Init();
 529 }
 530
 531 //_____________________________________________________________________________
 532 void AliVZEROv5::StepManager()
 533 {
 534
 535 // Step Manager, called at each step
 536
 537      Int_t     copy;
 538      static    Int_t   vol[4];
 539      static    Float_t hits[21];
 540      static    Float_t eloss, tlength;
 541      static    Int_t   nPhotonsInStep;
 542      static    Int_t   nPhotons;
 543      static    Int_t   numStep;
 544      Float_t   ringNumber;
 545      Float_t   destep, step;
 546
 547      numStep += 1;
 548
 549 //   We keep only charged tracks :
 550
 551      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 552
 553      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 554      vol[2]    = gMC->CurrentVolID(copy);
 555      vol[3]    = copy;
 556
 557      static Int_t idV0R1 = gMC->VolId("V0R1");
 558      static Int_t idV0L1 = gMC->VolId("V0L1");
 559      static Int_t idV0R2 = gMC->VolId("V0R2");
 560      static Int_t idV0L2 = gMC->VolId("V0L2");
 561      static Int_t idV0R3 = gMC->VolId("V0R3");
 562      static Int_t idV0L3 = gMC->VolId("V0L3");
 563      static Int_t idV0R4 = gMC->VolId("V0R4");
 564      static Int_t idV0L4 = gMC->VolId("V0L4");
 565      static Int_t idV0R5 = gMC->VolId("V0R5");
 566      static Int_t idV0R6 = gMC->VolId("V0R6");
 567
 568      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 569                gMC->CurrentVolID(copy) == idV0L1 )
 570                ringNumber = 1.0;
 571      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 572                gMC->CurrentVolID(copy) == idV0L2 )
 573                ringNumber = 2.0;
 574      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 575                gMC->CurrentVolID(copy) == idV0R4 ||
 576                gMC->CurrentVolID(copy) == idV0L3 )
 577                ringNumber = 3.0;
 578      else if ( gMC->CurrentVolID(copy) == idV0R5 ||
 579                gMC->CurrentVolID(copy) == idV0R6 ||
 580                gMC->CurrentVolID(copy) == idV0L4 )
 581                ringNumber = 4.0;
 582      else
 583                ringNumber = 0.0;
 584
 585      if  (  ringNumber > 0.5  ) {
 586
 587         destep    = gMC->Edep();
 588         step      = gMC->TrackStep();
 589
 590         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 591         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 592
 593         eloss    += destep;
 594         tlength  += step;
 595
 596         if  ( gMC->IsTrackEntering()  )  {
 597
 598             nPhotons  =  nPhotonsInStep;
 599             gMC->TrackPosition(fTrackPosition);
 600             gMC->TrackMomentum(fTrackMomentum);
 601
 602             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 603                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 604
 605             hits[0]  = fTrackPosition.X();
 606             hits[1]  = fTrackPosition.Y();
 607             hits[2]  = fTrackPosition.Z();
 608             hits[3]  = Float_t (gMC->TrackPid());
 609
 610             hits[4]  = gMC->TrackTime();
 611             hits[5]  = gMC->TrackCharge();
 612             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 613             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 614             hits[8]  = ringNumber;
 615
 616             hits[9]  = pt;
 617             hits[10] = fTrackMomentum.P();
 618             hits[11] = fTrackMomentum.Px();
 619             hits[12] = fTrackMomentum.Py();
 620             hits[13] = fTrackMomentum.Pz();
 621
 622             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 623             hits[14] = par->Vx();
 624             hits[15] = par->Vy();
 625             hits[16] = par->Vz();
 626
 627             tlength  = 0.0;
 628             eloss    = 0.0;
 629          }
 630
 631          nPhotons  = nPhotons + nPhotonsInStep;
 632
 633          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 634
 635          nPhotons  = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
 636          nPhotons  = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
 637
 638          hits[17] =   eloss;
 639          hits[18] = tlength;
 640          hits[19] = nPhotons;
 641          hits[20] = GetCellId (vol, hits);
 642
 643          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 644
 645          tlength         = 0.0;
 646          eloss           = 0.0;
 647          nPhotons        =   0;
 648          nPhotonsInStep  =   0;
 649
 650          numStep         =   0;
 651          }
 652     }
 653
 654 }
 655
 656 //_____________________________________________________________________________
 657 void AliVZEROv5::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 658 {
 659
 660 //  Adds a VZERO hit
 661
 662   TClonesArray &lhits = *fHits;
 663   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 664 }
 665
 666 //_____________________________________________________________________________
 667 void AliVZEROv5::AddDigits(Int_t *tracks, Int_t* digits)
 668 {
 669
 670 //  Adds a VZERO digit
 671
 672    TClonesArray  &ldigits = *fDigits;
 673    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 674 }
 675
 676 //_____________________________________________________________________________
 677 void AliVZEROv5::MakeBranch(Option_t *option)
 678 {
 679
 680 // Creates new branches in the current Root Tree
 681
 682   char branchname[10];
 683   sprintf(branchname,"%s",GetName());
 684   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
 685
 686   const char *cH = strstr(option,"H");
 687
 688   if (fHits   && fLoader->TreeH() && cH) {
 689     fLoader->TreeH()->Branch(branchname,&fHits, fBufferSize);
 690     AliDebug(2,Form("Making Branch %s for hits",branchname));
 691   }
 692
 693   const char *cD = strstr(option,"D");
 694
 695   if (fDigits   && fLoader->TreeD() && cD) {
 696     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 697     AliDebug(2,Form("Making Branch %s for digits",branchname));
 698   }
 699
 700 }
 701
 702 //_____________________________________________________________________________
 703 Int_t AliVZEROv5::GetCellId(Int_t *vol, Float_t *hits)
 704 {
 705
 706   //   Returns Id of scintillator cell
 707   //   Right side from  0 to 47
 708   //   Left  side from 48 to 95
 709
 710   //   hits[8] = ring number (1 to 4)
 711   //   vol[1]  = copy number (1 to 8)
 712
 713    Int_t index      = vol[1];
 714    Int_t RingNumber = Int_t(hits[8]);
 715    fCellId          = 0;
 716
 717 //    cout << "volID = " << vol[0] << "  copy = " << vol[1] << endl;
 718 //    cout << "X     = " << hits[0] << "    Y = " << hits[1] << endl;
 719
 720    Float_t phi = Float_t(TMath::ATan2(Double_t(hits[1]),Double_t(hits[0])) );
 721    phi = kRaddeg * phi;
 722
 723    if (index < 7) index = index + 8;
 724
 725    if (hits[2] < 0.0) {
 726       if(RingNumber < 3) {
 727          index = (index - 7) + ( ( RingNumber - 1 ) * 8);}
 728       else if(RingNumber >= 3){
 729        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R3")||
 730           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R5") )
 731          {index = (index*2 - 14) + ( ( RingNumber - 2 ) * 16); }
 732        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R4")||
 733           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R6") )
 734          {index = (index*2 - 13) + ( ( RingNumber - 2 ) * 16); }
 735       }
 736       fCellId   = index;
 737    }
 738
 739    else if (hits[2] > 0.0){
 740       index = (index - 7 + 48) + ( ( RingNumber - 1 ) * 8);
 741       fCellId   = index;}
 742
 743 //    cout << " ring   = " << RingNumber << " phi = "<<  phi << endl;
 744 //    cout << " cellID = " << fCellId <<  endl;
 745 //    cout <<  "**********" << endl;
 746
 747    return fCellId;
 748
 749
 750 }