VZERO/AliVZEROv2.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   *
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  10  * copies and that both the copyright notice and this permission notice   *
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  15
  16 /* $Id$ */
  17
  18 //////////////////////////////////////////////////////////////////////
  19 //                                                                  //
  20 //  (V-zero) detector  version 2  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  26th of november 2003                         //
  24 //  (circular instead of trapezoidal shapes as in previous versions //
  25 //   plus changes in cell dimensions and offsets) :                 //
  26 //   Scintillating cells are now 2 cm thick instead of 0.7 cm       //
  27 //   V0R sits between Z values  -89.4 and  -85.0 cm                 //
  28 //   V0L sits between Z values +350.0 and +352.0 cm                 //
  29 //   New coordinate system has been implemented in october 2003     //
  30 //                                                                  //
  31 //////////////////////////////////////////////////////////////////////
  32
  33 // --- Standard libraries ---
  34 #include <Riostream.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 // --- ROOT libraries ---
  39 #include <TClonesArray.h>
  40 #include <TGeoGlobalMagField.h>
  41 #include <TLorentzVector.h>
  42 #include <TMath.h>
  43 #include <TObjectTable.h>
  44 #include <TParticle.h>
  45 #include <TVirtualMC.h>
  46
  47 // --- AliRoot header files ---
  48 #include "AliRun.h"
  49 #include "AliMC.h"
  50 #include "AliConst.h"
  51 #include "AliLog.h"
  52 #include "AliMagF.h"
  53 #include "AliVZEROLoader.h"
  54 #include "AliVZEROdigit.h"
  55 #include "AliVZEROhit.h"
  56 #include "AliVZEROv2.h"
  57
  58 ClassImp(AliVZEROv2)
  59
  60 //_____________________________________________________________________________
  61 AliVZEROv2:: AliVZEROv2():AliVZERO()
  62 {
  63 // Standard default constructor
  64 }
  65
  66 //_____________________________________________________________________________
  67 AliVZEROv2::AliVZEROv2(const char *name, const char *title):
  68  AliVZERO(name,title)
  69 {
  70
  71 // Standard constructor for V-zero Detector  version 2
  72
  73   AliDebug(2,"Create VZERO object");
  74
  75 }
  76
  77 //_____________________________________________________________________________
  78 void AliVZEROv2::CreateGeometry()
  79 {
  80
  81 // Creates the GEANT geometry of the V-zero Detector  version 2
  82
  83   AliDebug(2,"Create VZERO Geometry");
  84
  85   Int_t    *idtmed = fIdtmed->GetArray()-2999;
  86
  87   Int_t    ndetR = 1;
  88   Int_t    ndetL = 1;
  89
  90   Int_t    ncellsR = 1;
  91   Int_t    ncellsL = 1;
  92
  93   Int_t    idrotm[999];
  94
  95   Float_t  height1, height2, height3, height4, height5;
  96   Float_t  height;
  97   Float_t  theta;
  98
  99   Float_t  halfThickQua;
 100
 101   Float_t  zdet;
 102   Float_t  r0, r5;
 103   Float_t  pi = TMath::Pi();
 104
 105   height1     =     1.82;         // height of cell 1, in cm
 106   height2     =     3.81;         // height of cell 2, in cm
 107   height3     =     4.72;         // height of cell 3, in cm
 108   height4     =     7.12;         // height of cell 4, in cm
 109   height5     =    10.83;         // height of cell 5, in cm
 110
 111   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 112
 113   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 114
 115 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 116 // absorber nose sitting at 90 cm. Will use -zdet later...
 117
 118   zdet        =    90.0 - 0.6 -fThickness/2.0;  // distance to vertex (along Z axis)
 119   r0          =    4.05;          // closest distance to center of the beam pipe
 120   height      =    height1 + height2 + height3 + height4 + height5;
 121   r5          =    r0 + height;
 122
 123 // Creation of mother volume v0LE - left part - :
 124 // Entrance face at  +350.0 cm  (new coordinate system) ...
 125
 126    Float_t   partube[3];
 127
 128    partube[0] =  4.3;
 129    partube[1] = 45.0;
 130    partube[2] = fThickness1/2.0;
 131
 132    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 133
 134 // Creation of five rings - left part - :
 135 // Entrance face at +350.0 cm  (new coordinate system) ...
 136
 137 // Mother volume v0L0 in which will be set 5 scintillator cells
 138
 139   Float_t   partubs[5];
 140
 141   Float_t   r0Left      =   4.3;
 142   Float_t   height1Left =   2.6;
 143   Float_t   height2Left =   4.1;
 144   Float_t   height3Left =   6.4;
 145   Float_t   height4Left =  10.2;
 146   Float_t   height5Left =  16.9;
 147   Float_t   heightLeft  = height1Left + height2Left + height3Left
 148                                       + height4Left + height5Left;
 149   Float_t   r5Left      = r0Left  + heightLeft;
 150
 151   partubs[0]      =  r0Left;
 152   partubs[1]      =  r5Left;
 153   partubs[2]      =  fThickness1/2.0;
 154   partubs[3]      =  90.0-15.0;
 155   partubs[4]      = 120.0-15.0;
 156
 157   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 158
 159   Float_t  r1Left =  r0Left + height1Left;
 160
 161   partubs[0]     =  r0Left;
 162   partubs[1]     =  r1Left;
 163
 164   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 165   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 166
 167   Float_t   r2Left  =   r1Left + height2Left;
 168
 169   partubs[0]     =  r1Left;
 170   partubs[1]     =  r2Left;
 171
 172   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 173   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 174
 175   Float_t   r3Left =   r2Left + height3Left;
 176
 177   partubs[0]     =  r2Left;
 178   partubs[1]     =  r3Left;
 179
 180   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 181   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 182
 183   Float_t   r4Left =  r3Left + height4Left;
 184
 185   partubs[0]     =  r3Left;
 186   partubs[1]     =  r4Left;
 187
 188   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 189   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 190
 191   partubs[0]     =  r4Left;
 192   partubs[1]     =  r5Left;
 193   partubs[3]     =  90.0-15.0;
 194   partubs[4]     = 120.0-30.0;
 195
 196   gMC->Gsvolu("V0L5","TUBS",idtmed[3005],partubs,5);  // quartz volume
 197   gMC->Gspos("V0L5",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 198
 199   partubs[3]     = 120.0-30.0;
 200   partubs[4]     = 120.0-15.0;
 201
 202   gMC->Gsvolu("V0L6","TUBS",idtmed[3005],partubs,5);  // quartz volume
 203   gMC->Gspos("V0L6",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 204
 205
 206 // Creation of mother volume v0RI - right part - :
 207
 208   partube[0] = r0 - 0.2;
 209   partube[1] = r5 + 1.0;
 210   partube[2] = fThickness/2.0;
 211
 212   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 213
 214 // Creation of  carbon lids (2 mm thick) to keep v0RI box shut...
 215
 216   Float_t  lidThickness = 0.2;
 217
 218   partube[0] =   r0;
 219   partube[1] =   r5;
 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 to maintain the v0RI pieces ...
 227
 228   partube[0] =   r0 - 0.2;
 229   partube[1] =   r0;
 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] =   r5;
 236   partube[1] =   r5 + 1.0;
 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 5  scintillator cells
 243
 244   partubs[0]      =  r0;
 245   partubs[1]      =  r5;
 246   partubs[2]      =  fThickness/2.0;
 247   partubs[3]      =  90.0-15.0;
 248   partubs[4]      = 120.0-15.0;
 249
 250   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 251
 252 // Elementary cell of ring 1 :
 253 // (cells 2 and 3  will be shifted by 1 cm to output fibers)
 254
 255   Float_t   offsetFibers  =  1.0;
 256   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 257   Float_t   r1            =  r0 + height1;
 258
 259   partubs[0]     =  r0;
 260   partubs[1]     =  r1;
 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
 268   Float_t   r2   =  r1 + height2;
 269
 270   partubs[0]     =  r1;
 271   partubs[1]     =  r2;
 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
 277 // Elementary cell of ring 3 :
 278
 279   Float_t   r3   =  r2 + height3;
 280
 281   partubs[0]     =  r2;
 282   partubs[1]     =  r3;
 283
 284   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 285   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 286
 287 // Elementary cell of ring 4 :
 288
 289   Float_t   r4   =  r3 + height4 ;
 290
 291   partubs[0]     =  r3;
 292   partubs[1]     =  r4;
 293
 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 cells of ring 5 :
 298
 299   partubs[0]     =  r4;
 300   partubs[1]     =  r5;
 301   partubs[3]     =  90.0-15.0;
 302   partubs[4]     = 120.0-30.0;
 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]     = 120.0-30.0;
 308   partubs[4]     = 120.0-15.0;
 309
 310   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 311   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 ,  -offset + 2.0 * offsetFibers, 0,"ONLY");
 312
 313   Float_t  phiDeg = 180./6.;
 314
 315 // Right part :
 316
 317   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 318       {
 319         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 320         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 321                           0.0,0.0,idrotm[902],"ONLY");
 322         ndetR++;
 323        }
 324
 325   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 326
 327   ncellsR = (ndetR - 1) * 6;
 328   AliInfo(Form("Number of cells on Right side =   %d",  ncellsR));
 329
 330 // Left part :
 331
 332   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 333       {
 334         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 335         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 336                           0.0,0.0,idrotm[902],"ONLY");
 337         ndetL++;
 338        }
 339
 340   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 341
 342   ncellsL = (ndetL - 1) * 6;
 343   AliInfo(Form("Number of cells on Left side  =   %d",  ncellsL));
 344
 345 }
 346
 347 //_____________________________________________________________________________
 348 void AliVZEROv2::CreateMaterials()
 349 {
 350
 351 // Creates materials used for geometry
 352
 353     AliDebug(2,"VZERO create materials");
 354
 355 /*
 356     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,
 357                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 358
 359
 360     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,
 361                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 362
 363     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 364                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 365                                  1.662295, 1.68337 };
 366
 367     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 368                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 369
 370     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 371
 372
 373     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 374
 375
 376     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,
 377                                1e-4,1e-4,1e-4,1e-4 };
 378     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 379
 380 */
 381
 382     Int_t *idtmed = fIdtmed->GetArray()-2999;
 383
 384
 385 //  Parameters related to Quarz (SiO2) :
 386
 387     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 388     Int_t nlmatqua;
 389
 390     aqua[0]    = 28.09;
 391     aqua[1]    = 16.;
 392     zqua[0]    = 14.;
 393     zqua[1]    = 8.;
 394     densqua    = 2.64;
 395     nlmatqua   = -2;
 396     wmatqua[0] = 1.;
 397     wmatqua[1] = 2.;
 398
 399 // Parameters  related to aluminum sheets :
 400
 401     Float_t  aal   = 26.98;
 402     Float_t  zal   = 13.00;
 403     Float_t  densal=   2.7;
 404     Float_t  radlal=   8.9;
 405
 406 // Parameters  related to scintillator CH :
 407
 408     Float_t ascin[2] = {1.00794,12.011};
 409     Float_t zscin[2] = {1.,6.};
 410     Float_t wscin[2] = {1.,1.};
 411     Float_t denscin  = 1.032;
 412
 413 // AIR
 414
 415     Float_t aAir[4]={12.,14.,16.,36.};
 416     Float_t zAir[4]={6.,7.,8.,18.};
 417     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 418     Float_t dAir = 1.20479E-3;
 419
 420 //  Definition of materials :
 421
 422     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 423     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 424     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 425     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 426     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 427     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 428
 429     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 430
 431
 432     Int_t   iSXFLD = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Integ();     // Field type
 433     Float_t sXMGMX = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Max();       // Field max.
 434
 435     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 436
 437     tmaxfd = 10.;
 438     stemax = 0.1;
 439     deemax = 0.1;
 440     epsil  = 0.001;
 441     stmin  = 0.001;
 442
 443 //  Active Air :
 444     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 445               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 446
 447 //  Inactive air :
 448
 449     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 450               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 451
 452     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 453               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 454
 455     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 456               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 457
 458     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 459               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 460
 461
 462     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 463               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 464
 465     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 466
 467     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 468     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 469     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 470     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 471
 472     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 473     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 474     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 475     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 476
 477     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 478     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 479     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 480     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 481     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 482     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 483
 484     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 485     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 486     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 487     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 488
 489     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 490     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 491     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 492     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 493     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 494     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 495
 496     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 497     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 498     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 499     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 500     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 501     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 502
 503
 504 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 505 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 506
 507 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 508 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 509
 510 }
 511
 512 //_____________________________________________________________________________
 513 void AliVZEROv2::DrawModule() const
 514 {
 515
 516 //  Drawing is done in DrawVZERO.C
 517
 518    AliDebug(2,"VZERO DrawModule");
 519
 520 }
 521
 522 //_____________________________________________________________________________
 523 void AliVZEROv2::Init()
 524 {
 525 // Initialises version 2 of the VZERO Detector
 526 // Just prints an information message
 527
 528    AliInfo(Form("VZERO version %d initialized",IsVersion()));
 529
 530 //   gMC->SetMaxStep(fMaxStepAlu);
 531 //   gMC->SetMaxStep(fMaxStepQua);
 532
 533     AliVZERO::Init();
 534
 535 }
 536
 537
 538 //_____________________________________________________________________________
 539 void AliVZEROv2::StepManager()
 540 {
 541
 542 // Step Manager, called at each step
 543
 544      Int_t     copy;
 545      static    Int_t   vol[4];
 546      static    Float_t hits[19];
 547      static    Float_t eloss, tlength;
 548
 549      TLorentzVector pos;
 550      TLorentzVector mom;
 551
 552      Float_t        theta;
 553      Float_t        phi;
 554      Float_t        ringNumber;
 555
 556      Int_t          ipart;
 557      Float_t        destep, step;
 558
 559
 560 //   We keep only charged tracks :
 561
 562      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 563
 564
 565      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 566      vol[2]    = gMC->CurrentVolID(copy);
 567      vol[3]    = copy;
 568
 569      static Int_t idV0R1 = gMC->VolId("V0R1");
 570      static Int_t idV0L1 = gMC->VolId("V0L1");
 571      static Int_t idV0R2 = gMC->VolId("V0R2");
 572      static Int_t idV0L2 = gMC->VolId("V0L2");
 573      static Int_t idV0R3 = gMC->VolId("V0R3");
 574      static Int_t idV0L3 = gMC->VolId("V0L3");
 575      static Int_t idV0R4 = gMC->VolId("V0R4");
 576      static Int_t idV0L4 = gMC->VolId("V0L4");
 577      static Int_t idV0R5 = gMC->VolId("V0R5");
 578      static Int_t idV0L5 = gMC->VolId("V0L5");
 579      static Int_t idV0R6 = gMC->VolId("V0R6");
 580      static Int_t idV0L6 = gMC->VolId("V0L6");
 581
 582      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 583                gMC->CurrentVolID(copy) == idV0L1 )
 584                ringNumber = 1.0;
 585      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 586                gMC->CurrentVolID(copy) == idV0L2 )
 587                ringNumber = 2.0;
 588      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 589                gMC->CurrentVolID(copy) == idV0L3 )
 590                ringNumber = 3.0;
 591      else if ( gMC->CurrentVolID(copy) == idV0R4 ||
 592                gMC->CurrentVolID(copy) == idV0L4 )
 593                ringNumber = 4.0;
 594      else if ( gMC->CurrentVolID(copy) == idV0R5 ||
 595                gMC->CurrentVolID(copy) == idV0L5 ||
 596                gMC->CurrentVolID(copy) == idV0R6 ||
 597                gMC->CurrentVolID(copy) == idV0L6 )
 598                ringNumber = 5.0;
 599      else
 600                ringNumber = 0.0;
 601
 602      if  (  ringNumber > 0.5  ) {
 603
 604         destep    = gMC->Edep();
 605         step      = gMC->TrackStep();
 606         eloss    += destep;
 607         tlength  += step;
 608
 609         if  ( gMC->IsTrackEntering()  )  {
 610
 611             gMC->TrackPosition(pos);
 612
 613             gMC->TrackMomentum(mom);
 614             Double_t tc   = mom[0]*mom[0]+mom[1]*mom[1];
 615             Double_t pt   = TMath::Sqrt(tc);
 616             Double_t pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
 617             theta   = Float_t(TMath::ATan2(pt,Double_t(mom[2])))*kRaddeg;
 618             phi     = Float_t(TMath::ATan2(Double_t(pos[1]),Double_t(pos[0])))*kRaddeg;
 619
 620 ////////////////////////////////////////////////////////////////////////////
 621      Float_t angle1 = Float_t(TMath::ATan2(Double_t(pos[1]),Double_t(pos[0])))*kRaddeg;
 622      if(angle1 < 0.0) angle1 = angle1 + 360.0;
 623      //PH     AliDebug(2,Form("RingNumber, copy, phi1  = %f %d %f \n", ringNumber,vol[1],angle1));
 624 ////////////////////////////////////////////////////////////////////////////
 625
 626
 627             ipart  = gMC->TrackPid();
 628
 629             hits[0]  = pos[0];
 630             hits[1]  = pos[1];
 631             hits[2]  = pos[2];
 632             hits[3]  =  Float_t (ipart);
 633
 634             hits[4]  = gMC->TrackTime();
 635             hits[5]  = gMC->TrackCharge();
 636             hits[6]  = theta;
 637             hits[7]  = phi;
 638             hits[8]  = ringNumber;
 639
 640             hits[9]  = pt;
 641             hits[10] = pmom;
 642             hits[11] = mom[0];
 643             hits[12] = mom[1];
 644             hits[13] = mom[2];
 645
 646             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 647             hits[14] = par->Vx();
 648             hits[15] = par->Vy();
 649             hits[16] = par->Vz();
 650
 651             tlength  = 0.0;
 652             eloss    = 0.0;
 653
 654          }
 655
 656          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 657
 658          hits[17] =   eloss;
 659          hits[18] = tlength;
 660
 661          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 662
 663          tlength  = 0.0;
 664          eloss    = 0.0;
 665
 666          }
 667     }
 668
 669 }
 670
 671 //_____________________________________________________________________________
 672 void AliVZEROv2::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 673 {
 674
 675 //  Adds a VZERO hit
 676
 677   TClonesArray &lhits = *fHits;
 678   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 679 }
 680
 681 //_____________________________________________________________________________
 682 void AliVZEROv2::AddDigits(Int_t *tracks, Int_t* digits)
 683 {
 684
 685 //  Adds a VZERO digit
 686
 687    TClonesArray  &ldigits = *fDigits;
 688    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 689 }
 690
 691 //_____________________________________________________________________________
 692 void AliVZEROv2::MakeBranch(Option_t *option)
 693 {
 694
 695 // Creates new branches in the current Root Tree
 696
 697   char branchname[10];
 698   sprintf(branchname,"%s",GetName());
 699   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
 700
 701   const char *cH = strstr(option,"H");
 702
 703   if (fHits   && fLoader->TreeH() && cH) {
 704     fLoader->TreeH()->Branch(branchname,&fHits, fBufferSize);
 705     AliDebug(2,Form("Making Branch %s for hits",branchname));
 706   }
 707
 708   const char *cD = strstr(option,"D");
 709
 710   if (fDigits   && fLoader->TreeD() && cD) {
 711     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 712     AliDebug(2,Form("Making Branch %s for digits",branchname));
 713   }
 714
 715 }