VZERO/AliVZEROv5.cxx

   1 /**************************************************************************
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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 <TGeometry.h>
  39 #include <TLorentzVector.h>
  40 #include <TMath.h>
  41 #include <TNode.h>
  42 #include <TObjectTable.h>
  43 #include <TTUBE.h>
  44 #include <TTUBS.h>
  45 #include <TVirtualMC.h>
  46 #include <TParticle.h>
  47
  48 // --- AliRoot header files ---
  49 #include "AliRun.h"
  50 #include "AliMC.h"
  51 #include "AliConst.h"
  52 #include "AliMagF.h"
  53 #include "AliVZEROLoader.h"
  54 #include "AliVZEROdigit.h"
  55 #include "AliVZEROhit.h"
  56 #include "AliVZEROv5.h"
  57 #include "AliLog.h"
  58
  59 ClassImp(AliVZEROv5)
  60
  61 //_____________________________________________________________________________
  62 AliVZEROv5:: AliVZEROv5():AliVZERO(),
  63    fCellId(0),
  64    fTrackPosition(),
  65    fTrackMomentum(),
  66    fLightYield(93.75),
  67    fLightAttenuation(0.05),
  68    fnMeters(15.0),
  69    fFibToPhot(0.3)
  70 {
  71 // Standard default constructor
  72 }
  73
  74 //_____________________________________________________________________________
  75 AliVZEROv5::AliVZEROv5(const char *name, const char *title):
  76    AliVZERO(name,title),
  77    fCellId(0),
  78    fTrackPosition(),
  79    fTrackMomentum(),
  80    fLightYield(93.75),
  81    fLightAttenuation(0.05),
  82    fnMeters(15.0),
  83    fFibToPhot(0.3)
  84 {
  85
  86 // Standard constructor for V-zero Detector  version 5
  87
  88   AliDebug(2,"Create VZERO object ");
  89 //
  90 //   fLightYield              =  93.75; // Light yield in BC408 (93.75 eV per photon)
  91 //   fLightAttenuation        =   0.05; // Light attenuation in fiber (0.05 per meter)
  92 //   fnMeters                 =   15.0; // Number of meters of clear fibers to PM
  93 //   fFibToPhot               =    0.3; // Attenuation at fiber-photocathode interface
  94 }
  95
  96 //_____________________________________________________________________________
  97 void AliVZEROv5::CreateGeometry()
  98 {
  99
 100 // Creates the GEANT geometry of the V-zero Detector  version 5
 101
 102   AliDebug(2,"Create Geometry ");
 103
 104   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 105
 106   Int_t    ndetR = 1;
 107   Int_t    ndetL = 1;
 108
 109   Int_t    ncellsR = 1;
 110   Int_t    ncellsL = 1;
 111
 112   Int_t    idrotm[999];
 113
 114   Float_t  height1Right, height2Right, height3Right, height4Right;
 115   Float_t  heightRight;
 116   Float_t  theta;
 117
 118   Float_t  halfThickQua;
 119
 120   Float_t  zdet;
 121   Float_t  r0Right, r4Right, rBoxRight;
 122   Float_t  pi = TMath::Pi();
 123
 124   height1Right    =     2.6;  // height of cell 1, in cm
 125   height2Right    =     4.6;  // height of cell 2, in cm
 126   height3Right    =     7.6;  // height of cell 3, in cm
 127   height4Right    =    12.7;  // height of cell 4, in cm
 128
 129   theta       = pi/4.0/2.0;       // half angular opening = 22.5 degrees
 130
 131   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 132
 133 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 134 // absorber nose sitting at 90 cm. Will use -zdet later...
 135 // size of V0R box (fThickness) is increased by 3 mm as compared to basic version
 136
 137   fThickness  =    fThickness + 0.3;             // now 4.7 cm instead of 4.4 cm
 138   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 139   r0Right     =    4.20;          // closest distance to center of the beam pipe
 140   heightRight =    height1Right + height2Right + height3Right + height4Right;
 141   r4Right     =    r0Right + heightRight + 0.3;
 142   rBoxRight   =    38.0;          // external radius of right box
 143
 144 // Creation of mother volume v0LE - left part - :
 145 // Entrance face at  +339.0 cm  (new coordinate system) ...
 146
 147    Float_t   partube[3];
 148
 149    partube[0] =  4.3;
 150    partube[1] = 44.0;
 151    partube[2] = fThickness1/2.0;
 152
 153    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 154
 155 // Creation of five rings - left part - :
 156 // Entrance face at +339.0 cm  (new coordinate system) ...
 157
 158 // Mother volume v0L0 in which will be set 5 scintillator cells
 159
 160   Float_t   partubs[5];
 161
 162   Float_t   r0Left      =   4.3;
 163   Float_t   height1Left =   3.3;
 164   Float_t   height2Left =   6.2;
 165   Float_t   height3Left =   8.9;
 166   Float_t   height4Left =  20.9;
 167   Float_t   heightLeft  =   height1Left + height2Left + height3Left + height4Left;
 168
 169   Float_t   r4Left      =   r0Left  + heightLeft;
 170
 171   partubs[0]     =  r0Left;
 172   partubs[1]     =  r4Left;
 173   partubs[2]     =  fThickness1/2.0;
 174   partubs[3]     =  90.0-22.5;
 175   partubs[4]     = 135.0-22.5;
 176
 177   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 178
 179   Float_t  r1Left =  r0Left + height1Left;
 180
 181   partubs[0]     =  r0Left;
 182   partubs[1]     =  r1Left;
 183
 184   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 185   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 186
 187   Float_t  r2Left  =  r1Left + height2Left;
 188
 189   partubs[0]     =  r1Left;
 190   partubs[1]     =  r2Left;
 191
 192   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 193   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 194
 195   Float_t  r3Left  =  r2Left + height3Left;
 196
 197   partubs[0]     =  r2Left;
 198   partubs[1]     =  r3Left;
 199
 200   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 201   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 202
 203   partubs[0]     =  r3Left;
 204   partubs[1]     =  r4Left;
 205
 206   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 207   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 208
 209 // Creation of mother volume v0RI - right part - :
 210
 211   partube[0] = r0Right - 0.2;
 212   partube[1] = r4Right + 1.0;
 213   partube[2] = fThickness/2.0;
 214
 215   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 216
 217 // Creation of  carbon lids (3.0 mm thick) to keep v0RI box shut...
 218
 219   Float_t  lidThickness = 0.30;
 220
 221   partube[0] =   r0Right;
 222   partube[1] =   rBoxRight;
 223   partube[2] =   +lidThickness/2.0;
 224
 225   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 226   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 227   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 228
 229 // Creation of aluminum rings 3.0 mm thick to maintain the v0RI pieces ...
 230
 231   partube[0] =   r0Right;
 232   partube[1] =   r0Right + 0.3;
 233   partube[2] =   +fThickness/2.0;
 234
 235   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 236   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 237
 238   partube[0] =   rBoxRight - 0.3;
 239   partube[1] =   rBoxRight;
 240   partube[2] =   +fThickness/2.0;
 241
 242   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 243   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 244
 245 // Mother volume v0R0 in which will be set 6 scintillator cells
 246
 247   partubs[0]      =  r0Right;
 248   partubs[1]      =  r4Right;
 249   partubs[2]      =  fThickness/2.0;
 250   partubs[3]      =  90.0-22.5;
 251   partubs[4]      = 135.0-22.5;
 252
 253   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 254
 255 // Elementary cell of ring 1 :
 256 // (cells of ring 1 will be shifted by 2.0 cm backwards to output fibers)
 257
 258   Float_t   offsetFibers  =  1.0;
 259   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 260   Float_t   r1Right       =  r0Right + 0.3 + height1Right;
 261
 262   partubs[0]     =  r0Right + 0.3;
 263   partubs[1]     =  r1Right;
 264   partubs[2]     =  fThickness1/2.0;
 265
 266   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 267   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 268
 269 // Elementary cell of ring 2 :
 270 // (cells of ring 2 will be shifted by 1.0 cm backwards to output fibers)
 271
 272   Float_t   r2Right   =  r1Right + height2Right;
 273
 274   partubs[0]     =  r1Right;
 275   partubs[1]     =  r2Right;
 276
 277   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 278   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 279
 280 // Elementary cell of ring 3 :
 281
 282   Float_t   r3Right   =  r2Right + height3Right;
 283
 284   partubs[0]     =  r2Right;
 285   partubs[1]     =  r3Right;
 286   partubs[3]     =  90.0-22.5;
 287   partubs[4]     = 112.5-22.5;
 288
 289   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 290   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 291
 292   partubs[3]     = 112.5-22.5;
 293   partubs[4]     = 135.0-22.5;
 294   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 295   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 296
 297 // Elementary cell of ring 4 :
 298
 299   partubs[0]     =  r3Right;
 300   partubs[1]     =  r4Right;
 301   partubs[3]     =  90.0-22.5;
 302   partubs[4]     = 112.5-22.5;
 303
 304   gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 305   gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 306
 307   partubs[3]     = 112.5-22.5;
 308   partubs[4]     = 135.0-22.5;
 309   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 310   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 311
 312   Float_t  phiDeg = 180./4.;
 313
 314 // Right part :
 315
 316   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 317       {
 318         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 319         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 320                           0.0,0.0,idrotm[902],"ONLY");
 321         ndetR++;
 322        }
 323
 324   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 325
 326   ncellsR = (ndetR - 1) * 6;
 327   AliInfo(Form("Number of cells on Right side =   %d\n",  ncellsR));
 328
 329 // Left part :
 330
 331   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 332       {
 333         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 334         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 335                           0.0,0.0,idrotm[902],"ONLY");
 336         ndetL++;
 337        }
 338
 339   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,339.0+fThickness1/2.0,0,"ONLY");
 340
 341   ncellsL = (ndetL - 1) * 4;
 342   AliInfo(Form("Number of cells on Left side  =   %d\n",  ncellsL));
 343
 344 }
 345
 346 //_____________________________________________________________________________
 347 void AliVZEROv5::CreateMaterials()
 348 {
 349
 350 // Creates materials used for geometry
 351
 352     AliDebug(2,"Create materials");
 353
 354 /*
 355     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,
 356                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 357
 358
 359     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,
 360                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 361
 362     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 363                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 364                                  1.662295, 1.68337 };
 365
 366     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 367                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 368
 369     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 370
 371
 372     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 373
 374
 375     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,
 376                                1e-4,1e-4,1e-4,1e-4 };
 377     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 378
 379 */
 380
 381     Int_t *idtmed = fIdtmed->GetArray()-2999;
 382
 383
 384 //  Parameters related to Quarz (SiO2) :
 385
 386     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 387     Int_t nlmatqua;
 388
 389     aqua[0]    = 28.09;
 390     aqua[1]    = 16.;
 391     zqua[0]    = 14.;
 392     zqua[1]    = 8.;
 393     densqua    = 2.64;
 394     nlmatqua   = -2;
 395     wmatqua[0] = 1.;
 396     wmatqua[1] = 2.;
 397
 398 // Parameters  related to aluminum sheets :
 399
 400     Float_t  aal   = 26.98;
 401     Float_t  zal   = 13.00;
 402     Float_t  densal=   2.7;
 403     Float_t  radlal=   8.9;
 404
 405 // Parameters  related to scintillator CH :
 406
 407     Float_t ascin[2] = {1.00794,12.011};
 408     Float_t zscin[2] = {1.,6.};
 409     Float_t wscin[2] = {1.,1.};
 410     Float_t denscin  = 1.032;
 411
 412 // AIR
 413
 414     Float_t aAir[4]={12.,14.,16.,36.};
 415     Float_t zAir[4]={6.,7.,8.,18.};
 416     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 417     Float_t dAir = 1.20479E-3;
 418
 419 //  Definition of materials :
 420
 421     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 422     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 423     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 424     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 425     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 426     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 427
 428     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 429
 430
 431     Int_t   iSXFLD = gAlice->Field()->Integ();
 432     Float_t sXMGMX = gAlice->Field()->Max();
 433
 434     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 435
 436     tmaxfd = 10.;
 437     stemax = 0.1;
 438     deemax = 0.1;
 439     epsil  = 0.001;
 440     stmin  = 0.001;
 441
 442 //  Active Air :
 443     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 444               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 445
 446 //  Inactive air :
 447
 448     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 449               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 450
 451     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 452               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 453
 454     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 455               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 456
 457     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 458               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 459
 460
 461     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 462               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 463
 464     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 465
 466     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 467     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 468     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 469     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 470
 471     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 472     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 473     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 474     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 475
 476     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 477     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 478     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 479     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 480     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 481     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 482
 483     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 484     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 485     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 486     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 487
 488     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 489     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 490     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 491     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 492     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 493     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 494
 495     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 496     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 497     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 498     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 499     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 500     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 501
 502
 503 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 504 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 505
 506 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 507 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 508
 509 }
 510
 511 //_____________________________________________________________________________
 512 void AliVZEROv5::DrawModule() const
 513 {
 514
 515 //  Drawing is done in DrawVZERO.C
 516
 517    AliDebug(2,"DrawModule");
 518 }
 519
 520 //_____________________________________________________________________________
 521 void AliVZEROv5::Init()
 522 {
 523 // Initialises version 2 of the VZERO Detector
 524 // Just prints an information message
 525
 526    AliInfo(Form("VZERO version %d initialized \n",IsVersion()));
 527
 528 //   gMC->SetMaxStep(fMaxStepAlu);
 529 //   gMC->SetMaxStep(fMaxStepQua);
 530
 531     AliVZERO::Init();
 532 }
 533
 534 //_____________________________________________________________________________
 535 void AliVZEROv5::StepManager()
 536 {
 537
 538 // Step Manager, called at each step
 539
 540      Int_t     copy;
 541      static    Int_t   vol[4];
 542      static    Float_t hits[21];
 543      static    Float_t eloss, tlength;
 544      static    Int_t   nPhotonsInStep;
 545      static    Int_t   nPhotons;
 546      static    Int_t   numStep;
 547      Float_t   ringNumber;
 548      Float_t   destep, step;
 549
 550      numStep += 1;
 551
 552 //   We keep only charged tracks :
 553
 554      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 555
 556      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 557      vol[2]    = gMC->CurrentVolID(copy);
 558      vol[3]    = copy;
 559
 560      static Int_t idV0R1 = gMC->VolId("V0R1");
 561      static Int_t idV0L1 = gMC->VolId("V0L1");
 562      static Int_t idV0R2 = gMC->VolId("V0R2");
 563      static Int_t idV0L2 = gMC->VolId("V0L2");
 564      static Int_t idV0R3 = gMC->VolId("V0R3");
 565      static Int_t idV0L3 = gMC->VolId("V0L3");
 566      static Int_t idV0R4 = gMC->VolId("V0R4");
 567      static Int_t idV0L4 = gMC->VolId("V0L4");
 568      static Int_t idV0R5 = gMC->VolId("V0R5");
 569      static Int_t idV0R6 = gMC->VolId("V0R6");
 570
 571      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 572                gMC->CurrentVolID(copy) == idV0L1 )
 573                ringNumber = 1.0;
 574      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 575                gMC->CurrentVolID(copy) == idV0L2 )
 576                ringNumber = 2.0;
 577      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 578                gMC->CurrentVolID(copy) == idV0R4 ||
 579                gMC->CurrentVolID(copy) == idV0L3 )
 580                ringNumber = 3.0;
 581      else if ( gMC->CurrentVolID(copy) == idV0R5 ||
 582                gMC->CurrentVolID(copy) == idV0R6 ||
 583                gMC->CurrentVolID(copy) == idV0L4 )
 584                ringNumber = 4.0;
 585      else
 586                ringNumber = 0.0;
 587
 588      if  (  ringNumber > 0.5  ) {
 589
 590         destep    = gMC->Edep();
 591         step      = gMC->TrackStep();
 592
 593         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 594         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 595
 596         eloss    += destep;
 597         tlength  += step;
 598
 599         if  ( gMC->IsTrackEntering()  )  {
 600
 601             nPhotons  =  nPhotonsInStep;
 602             gMC->TrackPosition(fTrackPosition);
 603             gMC->TrackMomentum(fTrackMomentum);
 604
 605             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 606                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 607
 608             hits[0]  = fTrackPosition.X();
 609             hits[1]  = fTrackPosition.Y();
 610             hits[2]  = fTrackPosition.Z();
 611             hits[3]  = Float_t (gMC->TrackPid());
 612
 613             hits[4]  = gMC->TrackTime();
 614             hits[5]  = gMC->TrackCharge();
 615             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 616             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 617             hits[8]  = ringNumber;
 618
 619             hits[9]  = pt;
 620             hits[10] = fTrackMomentum.P();
 621             hits[11] = fTrackMomentum.Px();
 622             hits[12] = fTrackMomentum.Py();
 623             hits[13] = fTrackMomentum.Pz();
 624
 625             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 626             hits[14] = par->Vx();
 627             hits[15] = par->Vy();
 628             hits[16] = par->Vz();
 629
 630             tlength  = 0.0;
 631             eloss    = 0.0;
 632          }
 633
 634          nPhotons  = nPhotons + nPhotonsInStep;
 635
 636          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 637
 638          nPhotons  = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
 639          nPhotons  = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
 640
 641          hits[17] =   eloss;
 642          hits[18] = tlength;
 643          hits[19] = nPhotons;
 644          hits[20] = GetCellId (vol, hits);
 645
 646          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 647
 648          tlength         = 0.0;
 649          eloss           = 0.0;
 650          nPhotons        =   0;
 651          nPhotonsInStep  =   0;
 652
 653          numStep         =   0;
 654          }
 655     }
 656
 657 }
 658
 659 //_____________________________________________________________________________
 660 void AliVZEROv5::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 661 {
 662
 663 //  Adds a VZERO hit
 664
 665   TClonesArray &lhits = *fHits;
 666   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 667 }
 668
 669 //_____________________________________________________________________________
 670 void AliVZEROv5::AddDigits(Int_t *tracks, Int_t* digits)
 671 {
 672
 673 //  Adds a VZERO digit
 674
 675    TClonesArray  &ldigits = *fDigits;
 676    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 677 }
 678
 679 //_____________________________________________________________________________
 680 void AliVZEROv5::MakeBranch(Option_t *option)
 681 {
 682
 683 // Creates new branches in the current Root Tree
 684
 685   char branchname[10];
 686   sprintf(branchname,"%s",GetName());
 687   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
 688
 689   const char *cH = strstr(option,"H");
 690
 691   if (fHits   && fLoader->TreeH() && cH) {
 692     fLoader->TreeH()->Branch(branchname,&fHits, fBufferSize);
 693     AliDebug(2,Form("Making Branch %s for hits",branchname));
 694   }
 695
 696   const char *cD = strstr(option,"D");
 697
 698   if (fDigits   && fLoader->TreeD() && cD) {
 699     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 700     AliDebug(2,Form("Making Branch %s for digits",branchname));
 701   }
 702
 703 }
 704
 705 //_____________________________________________________________________________
 706 Int_t AliVZEROv5::GetCellId(Int_t *vol, Float_t *hits)
 707 {
 708
 709   //   Returns Id of scintillator cell
 710   //   Right side from  0 to 47
 711   //   Left  side from 48 to 95
 712
 713   //   hits[8] = ring number (1 to 4)
 714   //   vol[1]  = copy number (1 to 8)
 715
 716    Int_t index      = vol[1];
 717    Int_t RingNumber = Int_t(hits[8]);
 718    fCellId          = 0;
 719
 720 //    cout << "volID = " << vol[0] << "  copy = " << vol[1] << endl;
 721 //    cout << "X     = " << hits[0] << "    Y = " << hits[1] << endl;
 722
 723    Float_t phi = Float_t(TMath::ATan2(Double_t(hits[1]),Double_t(hits[0])) );
 724    phi = kRaddeg * phi;
 725
 726    if (index < 7) index = index + 8;
 727
 728    if (hits[2] < 0.0) {
 729       if(RingNumber < 3) {
 730          index = (index - 7) + ( ( RingNumber - 1 ) * 8);}
 731       else if(RingNumber >= 3){
 732        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R3")||
 733           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R5") )
 734          {index = (index*2 - 14) + ( ( RingNumber - 2 ) * 16); }
 735        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R4")||
 736           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R6") )
 737          {index = (index*2 - 13) + ( ( RingNumber - 2 ) * 16); }
 738       }
 739       fCellId   = index;
 740    }
 741
 742    else if (hits[2] > 0.0){
 743       index = (index - 7 + 48) + ( ( RingNumber - 1 ) * 8);
 744       fCellId   = index;}
 745
 746 //    cout << " ring   = " << RingNumber << " phi = "<<  phi << endl;
 747 //    cout << " cellID = " << fCellId <<  endl;
 748 //    cout <<  "**********" << endl;
 749
 750    return fCellId;
 751
 752
 753 }