VZERO/AliVZEROv2.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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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 <TGeometry.h>
  41 #include <TLorentzVector.h>
  42 #include <TMath.h>
  43 #include <TNode.h>
  44 #include <TObjectTable.h>
  45 #include <TTUBE.h>
  46 #include <TTUBS.h>
  47 #include <TVirtualMC.h>
  48 #include <TParticle.h>
  49
  50 // --- AliRoot header files ---
  51 #include "AliRun.h"
  52 #include "AliMC.h"
  53 #include "AliConst.h"
  54 #include "AliLog.h"
  55 #include "AliMagF.h"
  56 #include "AliVZEROLoader.h"
  57 #include "AliVZEROdigit.h"
  58 #include "AliVZEROhit.h"
  59 #include "AliVZEROv2.h"
  60
  61 ClassImp(AliVZEROv2)
  62
  63 //_____________________________________________________________________________
  64 AliVZEROv2:: AliVZEROv2():AliVZERO()
  65 {
  66 // Standard default constructor
  67 }
  68
  69 //_____________________________________________________________________________
  70 AliVZEROv2::AliVZEROv2(const char *name, const char *title):
  71  AliVZERO(name,title)
  72 {
  73
  74 // Standard constructor for V-zero Detector  version 2
  75
  76   AliDebug(2,"Create VZERO object");
  77
  78 }
  79
  80 //_____________________________________________________________________________
  81 void AliVZEROv2::CreateGeometry()
  82 {
  83
  84 // Creates the GEANT geometry of the V-zero Detector  version 2
  85
  86   AliDebug(2,"Create VZERO Geometry");
  87
  88   Int_t    *idtmed = fIdtmed->GetArray()-2999;
  89
  90   Int_t    ndetR = 1;
  91   Int_t    ndetL = 1;
  92
  93   Int_t    ncellsR = 1;
  94   Int_t    ncellsL = 1;
  95
  96   Int_t    idrotm[999];
  97
  98   Float_t  height1, height2, height3, height4, height5;
  99   Float_t  height;
 100   Float_t  theta;
 101
 102   Float_t  halfThickQua;
 103
 104   Float_t  zdet;
 105   Float_t  r0, r5;
 106   Float_t  pi = TMath::Pi();
 107
 108   height1     =     1.82;         // height of cell 1, in cm
 109   height2     =     3.81;         // height of cell 2, in cm
 110   height3     =     4.72;         // height of cell 3, in cm
 111   height4     =     7.12;         // height of cell 4, in cm
 112   height5     =    10.83;         // height of cell 5, in cm
 113
 114   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 115
 116   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 117
 118 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 119 // absorber nose sitting at 90 cm. Will use -zdet later...
 120
 121   zdet        =    90.0 - 0.6 -fThickness/2.0;  // distance to vertex (along Z axis)
 122   r0          =    4.05;          // closest distance to center of the beam pipe
 123   height      =    height1 + height2 + height3 + height4 + height5;
 124   r5          =    r0 + height;
 125
 126 // Creation of mother volume v0LE - left part - :
 127 // Entrance face at  +350.0 cm  (new coordinate system) ...
 128
 129    Float_t   partube[3];
 130
 131    partube[0] =  4.3;
 132    partube[1] = 45.0;
 133    partube[2] = fThickness1/2.0;
 134
 135    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 136
 137 // Creation of five rings - left part - :
 138 // Entrance face at +350.0 cm  (new coordinate system) ...
 139
 140 // Mother volume v0L0 in which will be set 5 scintillator cells
 141
 142   Float_t   partubs[5];
 143
 144   Float_t   r0Left      =   4.3;
 145   Float_t   height1Left =   2.6;
 146   Float_t   height2Left =   4.1;
 147   Float_t   height3Left =   6.4;
 148   Float_t   height4Left =  10.2;
 149   Float_t   height5Left =  16.9;
 150   Float_t   heightLeft  = height1Left + height2Left + height3Left
 151                                       + height4Left + height5Left;
 152   Float_t   r5Left      = r0Left  + heightLeft;
 153
 154   partubs[0]      =  r0Left;
 155   partubs[1]      =  r5Left;
 156   partubs[2]      =  fThickness1/2.0;
 157   partubs[3]      =  90.0-15.0;
 158   partubs[4]      = 120.0-15.0;
 159
 160   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 161
 162   Float_t  r1Left =  r0Left + height1Left;
 163
 164   partubs[0]     =  r0Left;
 165   partubs[1]     =  r1Left;
 166
 167   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 168   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 169
 170   Float_t   r2Left  =   r1Left + height2Left;
 171
 172   partubs[0]     =  r1Left;
 173   partubs[1]     =  r2Left;
 174
 175   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 176   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 177
 178   Float_t   r3Left =   r2Left + height3Left;
 179
 180   partubs[0]     =  r2Left;
 181   partubs[1]     =  r3Left;
 182
 183   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 184   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 185
 186   Float_t   r4Left =  r3Left + height4Left;
 187
 188   partubs[0]     =  r3Left;
 189   partubs[1]     =  r4Left;
 190
 191   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 192   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 193
 194   partubs[0]     =  r4Left;
 195   partubs[1]     =  r5Left;
 196   partubs[3]     =  90.0-15.0;
 197   partubs[4]     = 120.0-30.0;
 198
 199   gMC->Gsvolu("V0L5","TUBS",idtmed[3005],partubs,5);  // quartz volume
 200   gMC->Gspos("V0L5",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 201
 202   partubs[3]     = 120.0-30.0;
 203   partubs[4]     = 120.0-15.0;
 204
 205   gMC->Gsvolu("V0L6","TUBS",idtmed[3005],partubs,5);  // quartz volume
 206   gMC->Gspos("V0L6",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 207
 208
 209 // Creation of mother volume v0RI - right part - :
 210
 211   partube[0] = r0 - 0.2;
 212   partube[1] = r5 + 1.0;
 213   partube[2] = fThickness/2.0;
 214
 215   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 216
 217 // Creation of  carbon lids (2 mm thick) to keep v0RI box shut...
 218
 219   Float_t  lidThickness = 0.2;
 220
 221   partube[0] =   r0;
 222   partube[1] =   r5;
 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 to maintain the v0RI pieces ...
 230
 231   partube[0] =   r0 - 0.2;
 232   partube[1] =   r0;
 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] =   r5;
 239   partube[1] =   r5 + 1.0;
 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 5  scintillator cells
 246
 247   partubs[0]      =  r0;
 248   partubs[1]      =  r5;
 249   partubs[2]      =  fThickness/2.0;
 250   partubs[3]      =  90.0-15.0;
 251   partubs[4]      = 120.0-15.0;
 252
 253   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 254
 255 // Elementary cell of ring 1 :
 256 // (cells 2 and 3  will be shifted by 1 cm to output fibers)
 257
 258   Float_t   offsetFibers  =  1.0;
 259   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 260   Float_t   r1            =  r0 + height1;
 261
 262   partubs[0]     =  r0;
 263   partubs[1]     =  r1;
 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
 271   Float_t   r2   =  r1 + height2;
 272
 273   partubs[0]     =  r1;
 274   partubs[1]     =  r2;
 275
 276   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 277   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 278
 279
 280 // Elementary cell of ring 3 :
 281
 282   Float_t   r3   =  r2 + height3;
 283
 284   partubs[0]     =  r2;
 285   partubs[1]     =  r3;
 286
 287   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 288   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 289
 290 // Elementary cell of ring 4 :
 291
 292   Float_t   r4   =  r3 + height4 ;
 293
 294   partubs[0]     =  r3;
 295   partubs[1]     =  r4;
 296
 297   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 298   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 ,  -offset + 2.0 * offsetFibers, 0,"ONLY");
 299
 300 // Elementary cells of ring 5 :
 301
 302   partubs[0]     =  r4;
 303   partubs[1]     =  r5;
 304   partubs[3]     =  90.0-15.0;
 305   partubs[4]     = 120.0-30.0;
 306
 307   gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 308   gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 309
 310   partubs[3]     = 120.0-30.0;
 311   partubs[4]     = 120.0-15.0;
 312
 313   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 314   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 ,  -offset + 2.0 * offsetFibers, 0,"ONLY");
 315
 316   Float_t  phiDeg = 180./6.;
 317
 318 // Right part :
 319
 320   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 321       {
 322         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 323         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 324                           0.0,0.0,idrotm[902],"ONLY");
 325         ndetR++;
 326        }
 327
 328   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 329
 330   ncellsR = (ndetR - 1) * 6;
 331   AliInfo(Form("Number of cells on Right side =   %d",  ncellsR));
 332
 333 // Left part :
 334
 335   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 336       {
 337         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 338         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 339                           0.0,0.0,idrotm[902],"ONLY");
 340         ndetL++;
 341        }
 342
 343   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 344
 345   ncellsL = (ndetL - 1) * 6;
 346   AliInfo(Form("Number of cells on Left side  =   %d",  ncellsL));
 347
 348 }
 349
 350 //_____________________________________________________________________________
 351 void AliVZEROv2::CreateMaterials()
 352 {
 353
 354 // Creates materials used for geometry
 355
 356     AliDebug(2,"VZERO create materials");
 357
 358 /*
 359     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,
 360                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 361
 362
 363     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,
 364                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 365
 366     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 367                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 368                                  1.662295, 1.68337 };
 369
 370     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 371                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 372
 373     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 374
 375
 376     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 377
 378
 379     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,
 380                                1e-4,1e-4,1e-4,1e-4 };
 381     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 382
 383 */
 384
 385     Int_t *idtmed = fIdtmed->GetArray()-2999;
 386
 387
 388 //  Parameters related to Quarz (SiO2) :
 389
 390     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 391     Int_t nlmatqua;
 392
 393     aqua[0]    = 28.09;
 394     aqua[1]    = 16.;
 395     zqua[0]    = 14.;
 396     zqua[1]    = 8.;
 397     densqua    = 2.64;
 398     nlmatqua   = -2;
 399     wmatqua[0] = 1.;
 400     wmatqua[1] = 2.;
 401
 402 // Parameters  related to aluminum sheets :
 403
 404     Float_t  aal   = 26.98;
 405     Float_t  zal   = 13.00;
 406     Float_t  densal=   2.7;
 407     Float_t  radlal=   8.9;
 408
 409 // Parameters  related to scintillator CH :
 410
 411     Float_t ascin[2] = {1.00794,12.011};
 412     Float_t zscin[2] = {1.,6.};
 413     Float_t wscin[2] = {1.,1.};
 414     Float_t denscin  = 1.032;
 415
 416 // AIR
 417
 418     Float_t aAir[4]={12.,14.,16.,36.};
 419     Float_t zAir[4]={6.,7.,8.,18.};
 420     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 421     Float_t dAir = 1.20479E-3;
 422
 423 //  Definition of materials :
 424
 425     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 426     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 427     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 428     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 429     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 430     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 431
 432     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 433
 434
 435     Int_t   iSXFLD = gAlice->Field()->Integ();
 436     Float_t sXMGMX = gAlice->Field()->Max();
 437
 438     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 439
 440     tmaxfd = 10.;
 441     stemax = 0.1;
 442     deemax = 0.1;
 443     epsil  = 0.001;
 444     stmin  = 0.001;
 445
 446 //  Active Air :
 447     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 448               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 449
 450 //  Inactive air :
 451
 452     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 453               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 454
 455     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 456               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 457
 458     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 459               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 460
 461     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 462               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 463
 464
 465     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 466               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 467
 468     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 469
 470     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 471     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 472     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 473     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 474
 475     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 476     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 477     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 478     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 479
 480     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 481     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 482     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 483     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 484     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 485     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 486
 487     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 488     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 489     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 490     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 491
 492     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 493     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 494     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 495     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 496     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 497     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 498
 499     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 500     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 501     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 502     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 503     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 504     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 505
 506
 507 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 508 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 509
 510 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 511 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 512
 513 }
 514
 515 //_____________________________________________________________________________
 516 void AliVZEROv2::DrawModule() const
 517 {
 518
 519 //  Drawing is done in DrawVZERO.C
 520
 521    AliDebug(2,"VZERO DrawModule");
 522
 523 }
 524
 525 //_____________________________________________________________________________
 526 void AliVZEROv2::Init()
 527 {
 528 // Initialises version 2 of the VZERO Detector
 529 // Just prints an information message
 530
 531    AliInfo(Form("VZERO version %d initialized",IsVersion()));
 532
 533 //   gMC->SetMaxStep(fMaxStepAlu);
 534 //   gMC->SetMaxStep(fMaxStepQua);
 535
 536     AliVZERO::Init();
 537
 538 }
 539
 540
 541 //_____________________________________________________________________________
 542 void AliVZEROv2::StepManager()
 543 {
 544
 545 // Step Manager, called at each step
 546
 547      Int_t     copy;
 548      static    Int_t   vol[4];
 549      static    Float_t hits[19];
 550      static    Float_t eloss, tlength;
 551
 552      TLorentzVector pos;
 553      TLorentzVector mom;
 554
 555      Float_t        theta;
 556      Float_t        phi;
 557      Float_t        ringNumber;
 558
 559      Int_t          ipart;
 560      Float_t        destep, step;
 561
 562
 563 //   We keep only charged tracks :
 564
 565      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 566
 567
 568      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 569      vol[2]    = gMC->CurrentVolID(copy);
 570      vol[3]    = copy;
 571
 572      static Int_t idV0R1 = gMC->VolId("V0R1");
 573      static Int_t idV0L1 = gMC->VolId("V0L1");
 574      static Int_t idV0R2 = gMC->VolId("V0R2");
 575      static Int_t idV0L2 = gMC->VolId("V0L2");
 576      static Int_t idV0R3 = gMC->VolId("V0R3");
 577      static Int_t idV0L3 = gMC->VolId("V0L3");
 578      static Int_t idV0R4 = gMC->VolId("V0R4");
 579      static Int_t idV0L4 = gMC->VolId("V0L4");
 580      static Int_t idV0R5 = gMC->VolId("V0R5");
 581      static Int_t idV0L5 = gMC->VolId("V0L5");
 582      static Int_t idV0R6 = gMC->VolId("V0R6");
 583      static Int_t idV0L6 = gMC->VolId("V0L6");
 584
 585      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 586                gMC->CurrentVolID(copy) == idV0L1 )
 587                ringNumber = 1.0;
 588      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 589                gMC->CurrentVolID(copy) == idV0L2 )
 590                ringNumber = 2.0;
 591      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 592                gMC->CurrentVolID(copy) == idV0L3 )
 593                ringNumber = 3.0;
 594      else if ( gMC->CurrentVolID(copy) == idV0R4 ||
 595                gMC->CurrentVolID(copy) == idV0L4 )
 596                ringNumber = 4.0;
 597      else if ( gMC->CurrentVolID(copy) == idV0R5 ||
 598                gMC->CurrentVolID(copy) == idV0L5 ||
 599                gMC->CurrentVolID(copy) == idV0R6 ||
 600                gMC->CurrentVolID(copy) == idV0L6 )
 601                ringNumber = 5.0;
 602      else
 603                ringNumber = 0.0;
 604
 605      if  (  ringNumber > 0.5  ) {
 606
 607         destep    = gMC->Edep();
 608         step      = gMC->TrackStep();
 609         eloss    += destep;
 610         tlength  += step;
 611
 612         if  ( gMC->IsTrackEntering()  )  {
 613
 614             gMC->TrackPosition(pos);
 615
 616             gMC->TrackMomentum(mom);
 617             Double_t tc   = mom[0]*mom[0]+mom[1]*mom[1];
 618             Double_t pt   = TMath::Sqrt(tc);
 619             Double_t pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
 620             theta   = Float_t(TMath::ATan2(pt,Double_t(mom[2])))*kRaddeg;
 621             phi     = Float_t(TMath::ATan2(Double_t(pos[1]),Double_t(pos[0])))*kRaddeg;
 622
 623 ////////////////////////////////////////////////////////////////////////////
 624      Float_t angle1 = Float_t(TMath::ATan2(Double_t(pos[1]),Double_t(pos[0])))*kRaddeg;
 625      if(angle1 < 0.0) angle1 = angle1 + 360.0;
 626      //PH     AliDebug(2,Form("RingNumber, copy, phi1  = %f %d %f \n", ringNumber,vol[1],angle1));
 627 ////////////////////////////////////////////////////////////////////////////
 628
 629
 630             ipart  = gMC->TrackPid();
 631
 632             hits[0]  = pos[0];
 633             hits[1]  = pos[1];
 634             hits[2]  = pos[2];
 635             hits[3]  =  Float_t (ipart);
 636
 637             hits[4]  = gMC->TrackTime();
 638             hits[5]  = gMC->TrackCharge();
 639             hits[6]  = theta;
 640             hits[7]  = phi;
 641             hits[8]  = ringNumber;
 642
 643             hits[9]  = pt;
 644             hits[10] = pmom;
 645             hits[11] = mom[0];
 646             hits[12] = mom[1];
 647             hits[13] = mom[2];
 648
 649             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 650             hits[14] = par->Vx();
 651             hits[15] = par->Vy();
 652             hits[16] = par->Vz();
 653
 654             tlength  = 0.0;
 655             eloss    = 0.0;
 656
 657          }
 658
 659          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 660
 661          hits[17] =   eloss;
 662          hits[18] = tlength;
 663
 664          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 665
 666          tlength  = 0.0;
 667          eloss    = 0.0;
 668
 669          }
 670     }
 671
 672 }
 673
 674 //_____________________________________________________________________________
 675 void AliVZEROv2::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 676 {
 677
 678 //  Adds a VZERO hit
 679
 680   TClonesArray &lhits = *fHits;
 681   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 682 }
 683
 684 //_____________________________________________________________________________
 685 void AliVZEROv2::AddDigits(Int_t *tracks, Int_t* digits)
 686 {
 687
 688 //  Adds a VZERO digit
 689
 690    TClonesArray  &ldigits = *fDigits;
 691    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 692 }
 693
 694 //_____________________________________________________________________________
 695 void AliVZEROv2::MakeBranch(Option_t *option)
 696 {
 697
 698 // Creates new branches in the current Root Tree
 699
 700   char branchname[10];
 701   sprintf(branchname,"%s",GetName());
 702   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
 703
 704   const char *cH = strstr(option,"H");
 705
 706   if (fHits   && TreeH() && cH) {
 707     TreeH()->Branch(branchname,&fHits, fBufferSize);
 708     AliDebug(2,Form("Making Branch %s for hits",branchname));
 709   }
 710
 711   const char *cD = strstr(option,"D");
 712
 713   if (fDigits   && fLoader->TreeD() && cD) {
 714     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 715     AliDebug(2,Form("Making Branch %s for digits",branchname));
 716   }
 717
 718 }