VZERO/AliVZEROv5.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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   6  *                                                                        *
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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::BuildGeometry()
 348 {
 349
 350 // Builds simple ROOT TNode geometry for event display
 351
 352   AliDebug(2,"VZERO BuildGeometry");
 353
 354   TNode *top;
 355
 356   TNode *v0Rnode,  *v0Rnode0, *v0Rnode7, *v0Rnode8, *v0Rnode9, *v0Rnode10;
 357   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3, *v0Rnode4, *v0Rnode5, *v0Rnode6;
 358   TNode *v0Lnode, *v0Lnode0;
 359   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3, *v0Lnode4;
 360
 361   const int kColorVZERO  = kGreen;
 362
 363   top = gAlice->GetGeometry()->GetNode("alice");
 364
 365   Float_t  height1Right, height2Right, height3Right, height4Right;
 366   Float_t  heightRight;
 367   Float_t  theta;
 368
 369   Float_t  halfThickQua;
 370   Float_t  zdet;
 371   Float_t  r0Right, r4Right, rBoxRight;
 372   Float_t  pi = TMath::Pi();
 373
 374   height1Right      =     2.6;  // height of cell 1, in cm
 375   height2Right      =     4.6;  // height of cell 2, in cm
 376   height3Right      =     7.6;  // height of cell 3, in cm
 377   height4Right      =    12.7;  // height of cell 4, in cm
 378
 379   theta             =    pi/4.0/2.0;
 380
 381   halfThickQua      =    fThickness1/2.0;
 382
 383   zdet              =    90.0 - 0.6 - fThickness/2.0;
 384   r0Right           =    4.20;
 385   heightRight       =    height1Right + height2Right + height3Right + height4Right;
 386   r4Right           =    r0Right + heightRight + 0.3;
 387   rBoxRight         =    38.0;
 388
 389   Int_t     ndiv    =     1;
 390
 391   Float_t   partube[3];
 392
 393   partube[0] =  r0Right - 0.2;
 394   partube[1] =  r4Right + 1.0;
 395   partube[2] = fThickness/2.0;
 396
 397   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 398
 399   top->cd();
 400
 401   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 402
 403   v0Rnode->SetLineColor(kYellow);
 404   fNodes->Add(v0Rnode);
 405   v0Rnode->SetVisibility(2);
 406
 407 // Rondelles de carbone (epaisseur 3.0 mm) de maintien des cellules ...
 408
 409   Float_t  lidThickness = 0.30;
 410
 411   partube[0] =   r0Right;
 412   partube[1] =   rBoxRight;
 413   partube[2] =   +lidThickness/2.0;
 414
 415   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 416
 417   v0Rnode->cd();
 418   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 419   v0Rnode7->SetLineColor(kYellow);
 420   fNodes->Add(v0Rnode7);
 421   v0Rnode->cd();
 422   v0Rnode8 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 423   v0Rnode8->SetLineColor(kYellow);
 424   fNodes->Add(v0Rnode8);
 425
 426   partube[0] =   r0Right;
 427   partube[1] =   r0Right + 0.3;
 428   partube[2] =   +fThickness/2.0;
 429
 430   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 431
 432   v0Rnode->cd();
 433   v0Rnode9 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 434   v0Rnode9->SetLineColor(kYellow);
 435   fNodes->Add(v0Rnode9);
 436
 437   partube[0] =   rBoxRight - 0.3;
 438   partube[1] =   rBoxRight;
 439   partube[2] =   +fThickness/2.0;
 440
 441   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 442
 443   v0Rnode->cd();
 444   v0Rnode10 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 445   v0Rnode10->SetLineColor(kYellow);
 446   fNodes->Add(v0Rnode10);
 447
 448   Float_t   partubs[5];
 449
 450   partubs[0]      =  r0Right;
 451   partubs[1]      =  r4Right;
 452   partubs[2]      =  fThickness/2.0;
 453   partubs[3]      =  90.0-22.5;
 454   partubs[4]      = 135.0-22.5;
 455
 456   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 457                                                   partubs[3], partubs[4]);
 458
 459   v0R0->SetNumberOfDivisions(ndiv);
 460
 461   Float_t   r1Right =  r0Right + 0.3 + height1Right;
 462   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 463   Float_t   offsetFibers = 1.0;
 464
 465   partubs[0]     =  r0Right + 0.3;
 466   partubs[1]     =  r1Right;
 467   partubs[2]     =  fThickness1/2.0;
 468
 469   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 470                                                   partubs[3], partubs[4]);
 471
 472   v0R1->SetNumberOfDivisions(ndiv);
 473
 474   Float_t   r2Right  =  r1Right + height2Right;
 475
 476   partubs[0]     =  r1Right;
 477   partubs[1]     =  r2Right;
 478
 479   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 480                                                   partubs[3], partubs[4]);
 481
 482   v0R2->SetNumberOfDivisions(ndiv);
 483
 484 // Ring 3 :
 485
 486   Float_t   r3Right  =  r2Right + height3Right;
 487
 488   partubs[0]     =  r2Right;
 489   partubs[1]     =  r3Right;
 490   partubs[3]     =  90.0-22.5;
 491   partubs[4]     = 112.5-22.5;
 492
 493   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 494                                                   partubs[3], partubs[4]);
 495   v0R3->SetNumberOfDivisions(ndiv);
 496
 497   partubs[3]     = 112.5-22.5;
 498   partubs[4]     = 135.0-22.5;
 499
 500   TTUBS *v0R4 = new TTUBS("V0R4", "V0R4", "void", partubs[0], partubs[1], partubs[2],
 501                                                   partubs[3], partubs[4]);
 502   v0R4->SetNumberOfDivisions(ndiv);
 503
 504 // Ring 4 :
 505
 506   partubs[0]     =  r3Right;
 507   partubs[1]     =  r4Right;
 508   partubs[3]     =  90.0-22.5;
 509   partubs[4]     = 112.5-22.5;
 510
 511   TTUBS *v0R5 = new TTUBS("V0R5", "V0R5", "void", partubs[0], partubs[1], partubs[2],
 512                                                   partubs[3], partubs[4]);
 513   v0R5->SetNumberOfDivisions(ndiv);
 514
 515   partubs[3]     = 112.5-22.5;
 516   partubs[4]     = 135.0-22.5;
 517
 518   TTUBS *v0R6 = new TTUBS("V0R6", "V0R6", "void", partubs[0], partubs[1], partubs[2],
 519                                                   partubs[3], partubs[4]);
 520   v0R6->SetNumberOfDivisions(ndiv);
 521
 522   Float_t  phi;
 523   Float_t  phiDeg= 180./4.;
 524
 525   Int_t    ndetR = 1;
 526
 527   char     nameNode[12];
 528
 529   for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 530
 531   {
 532     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 533
 534     sprintf(nameNode,"SUBDER%d",ndetR);
 535
 536     v0Rnode->cd();
 537     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 538     v0Rnode0->SetLineColor(kYellow);
 539     fNodes->Add(v0Rnode0);
 540     ndetR++;
 541
 542     sprintf(nameNode,"SUBDER%d",ndetR);
 543     v0Rnode0->cd();
 544     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset ,0);
 545     v0Rnode1->SetLineColor(kColorVZERO);
 546     fNodes->Add(v0Rnode1);
 547     ndetR++;
 548
 549     sprintf(nameNode,"SUBDER%d",ndetR);
 550     v0Rnode0->cd();
 551     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset + offsetFibers,0);
 552     v0Rnode2->SetLineColor(kColorVZERO);
 553     fNodes->Add(v0Rnode2);
 554     ndetR++;
 555
 556     sprintf(nameNode,"SUBDER%d",ndetR);
 557     v0Rnode0->cd();
 558     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset + 2.0*offsetFibers,0);
 559     v0Rnode3->SetLineColor(kColorVZERO);
 560     fNodes->Add(v0Rnode3);
 561     ndetR++;
 562
 563     sprintf(nameNode,"SUBDER%d",ndetR);
 564     v0Rnode0->cd();
 565     v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset + 2.0*offsetFibers,0);
 566     v0Rnode4->SetLineColor(kColorVZERO);
 567     fNodes->Add(v0Rnode4);
 568     ndetR++;
 569
 570     sprintf(nameNode,"SUBDER%d",ndetR);
 571     v0Rnode0->cd();
 572     v0Rnode5 = new TNode(nameNode,nameNode,v0R5,0.0,0.0, -offset + 2.0*offsetFibers,0);
 573     v0Rnode5->SetLineColor(kColorVZERO);
 574     fNodes->Add(v0Rnode5);
 575     ndetR++;
 576
 577     sprintf(nameNode,"SUBDER%d",ndetR);
 578     v0Rnode0->cd();
 579     v0Rnode6 = new TNode(nameNode,nameNode,v0R6,0.0,0.0, -offset + 2.0*offsetFibers,0);
 580     v0Rnode6->SetLineColor(kColorVZERO);
 581     fNodes->Add(v0Rnode6);
 582     ndetR++;
 583
 584     v0Rnode0->SetVisibility(2);
 585   }
 586
 587 // Left side of VZERO :
 588
 589   Float_t   r0Left      =    4.3;
 590   Float_t   height1Left =    3.3;
 591   Float_t   height2Left =    6.2;
 592   Float_t   height3Left =    8.9;
 593   Float_t   height4Left =   20.9;
 594   Float_t   heightLeft  = height1Left + height2Left + height3Left + height4Left;
 595
 596   Float_t   r4Left      = r0Left  + heightLeft;
 597
 598   partube[0] =  r0Left;
 599   partube[1] =  r4Left;
 600   partube[2] =  fThickness1/2.0;
 601
 602   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 603
 604   top->cd();
 605
 606   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,339.0+fThickness1/2.0,0);
 607
 608   v0Lnode->SetLineColor(kBlue);
 609   fNodes->Add(v0Lnode);
 610
 611   v0Lnode->SetVisibility(2);
 612
 613   partubs[0]      =  r0Left;
 614   partubs[1]      =  r4Left;
 615   partubs[2]      =  fThickness1/2.0;
 616   partubs[3]      =  90.0-22.5;
 617   partubs[4]      = 135.0-22.5;
 618
 619   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 620                                                   partubs[3], partubs[4]);
 621
 622   v0L0->SetNumberOfDivisions(ndiv);
 623   v0L0->SetLineColor(7);
 624
 625   Float_t   offsetLeft;
 626   offsetLeft    = - fThickness1/2.0;
 627
 628   Float_t   r1Left =  r0Left + height1Left;
 629
 630   partubs[0]     =  r0Left;
 631   partubs[1]     =  r1Left;
 632
 633   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 634                                                   partubs[3], partubs[4]);
 635   v0L1->SetNumberOfDivisions(ndiv);
 636
 637   Float_t   r2Left =  r1Left + height2Left;
 638
 639   partubs[0]     =  r1Left;
 640   partubs[1]     =  r2Left;
 641
 642   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 643                                                   partubs[3], partubs[4]);
 644   v0L2->SetNumberOfDivisions(ndiv);
 645
 646   Float_t   r3Left =  r2Left + height3Left;
 647
 648   partubs[0]     =  r2Left;
 649   partubs[1]     =  r3Left;
 650
 651   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 652                                                   partubs[3], partubs[4]);
 653   v0L3->SetNumberOfDivisions(ndiv);
 654
 655   partubs[0]     =  r3Left;
 656   partubs[1]     =  r4Left;
 657
 658   TTUBS *v0L4 = new TTUBS("V0L4", "V0L4", "void", partubs[0], partubs[1], partubs[2],
 659                                                   partubs[3], partubs[4]);
 660   v0L4->SetNumberOfDivisions(ndiv);
 661
 662   Int_t    ndetL   = 1;
 663
 664   for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 665
 666   {
 667
 668     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 669
 670     sprintf(nameNode,"SUBDEL%d",ndetL);
 671
 672     v0Lnode->cd();
 673     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 674     v0Lnode0->SetLineColor(kColorVZERO);
 675     fNodes->Add(v0Lnode0);
 676     ndetL++;
 677
 678     sprintf(nameNode,"SUBDEL%d",ndetL);
 679     v0Lnode0->cd();
 680     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 681     v0Lnode1->SetLineColor(kColorVZERO);
 682     fNodes->Add(v0Lnode1);
 683     ndetL++;
 684
 685     sprintf(nameNode,"SUBDEL%d",ndetL);
 686     v0Lnode0->cd();
 687     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 688     v0Lnode2->SetLineColor(kColorVZERO);
 689     fNodes->Add(v0Lnode2);
 690     ndetL++;
 691
 692     sprintf(nameNode,"SUBDEL%d",ndetL);
 693     v0Lnode0->cd();
 694     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 695     v0Lnode3->SetLineColor(kColorVZERO);
 696     fNodes->Add(v0Lnode3);
 697     ndetL++;
 698
 699     sprintf(nameNode,"SUBDEL%d",ndetL);
 700     v0Lnode0->cd();
 701     v0Lnode4 = new TNode(nameNode,nameNode,v0L4,0.0,0.0, 0.0,0);
 702     v0Lnode4->SetLineColor(kColorVZERO);
 703     fNodes->Add(v0Lnode4);
 704     ndetL++;
 705
 706     v0Lnode0->SetVisibility(2);
 707   }
 708 }
 709
 710 //_____________________________________________________________________________
 711 void AliVZEROv5::CreateMaterials()
 712 {
 713
 714 // Creates materials used for geometry
 715
 716     AliDebug(2,"Create materials");
 717
 718 /*
 719     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,
 720                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 721
 722
 723     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,
 724                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 725
 726     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 727                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 728                                  1.662295, 1.68337 };
 729
 730     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 731                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 732
 733     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 734
 735
 736     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 737
 738
 739     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,
 740                                1e-4,1e-4,1e-4,1e-4 };
 741     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 742
 743 */
 744
 745     Int_t *idtmed = fIdtmed->GetArray()-2999;
 746
 747
 748 //  Parameters related to Quarz (SiO2) :
 749
 750     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 751     Int_t nlmatqua;
 752
 753     aqua[0]    = 28.09;
 754     aqua[1]    = 16.;
 755     zqua[0]    = 14.;
 756     zqua[1]    = 8.;
 757     densqua    = 2.64;
 758     nlmatqua   = -2;
 759     wmatqua[0] = 1.;
 760     wmatqua[1] = 2.;
 761
 762 // Parameters  related to aluminum sheets :
 763
 764     Float_t  aal   = 26.98;
 765     Float_t  zal   = 13.00;
 766     Float_t  densal=   2.7;
 767     Float_t  radlal=   8.9;
 768
 769 // Parameters  related to scintillator CH :
 770
 771     Float_t ascin[2] = {1.00794,12.011};
 772     Float_t zscin[2] = {1.,6.};
 773     Float_t wscin[2] = {1.,1.};
 774     Float_t denscin  = 1.032;
 775
 776 // AIR
 777
 778     Float_t aAir[4]={12.,14.,16.,36.};
 779     Float_t zAir[4]={6.,7.,8.,18.};
 780     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 781     Float_t dAir = 1.20479E-3;
 782
 783 //  Definition of materials :
 784
 785     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 786     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 787     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 788     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 789     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 790     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 791
 792     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 793
 794
 795     Int_t   iSXFLD = gAlice->Field()->Integ();
 796     Float_t sXMGMX = gAlice->Field()->Max();
 797
 798     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 799
 800     tmaxfd = 10.;
 801     stemax = 0.1;
 802     deemax = 0.1;
 803     epsil  = 0.001;
 804     stmin  = 0.001;
 805
 806 //  Active Air :
 807     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 808               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 809
 810 //  Inactive air :
 811
 812     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 813               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 814
 815     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 816               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 817
 818     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 819               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 820
 821     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 822               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 823
 824
 825     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 826               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 827
 828     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 829
 830     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 831     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 832     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 833     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 834
 835     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 836     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 837     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 838     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 839
 840     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 841     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 842     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 843     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 844     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 845     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 846
 847     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 848     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 849     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 850     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 851
 852     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 853     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 854     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 855     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 856     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 857     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 858
 859     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 860     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 861     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 862     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 863     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 864     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 865
 866
 867 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 868 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 869
 870 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 871 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 872
 873 }
 874
 875 //_____________________________________________________________________________
 876 void AliVZEROv5::DrawModule() const
 877 {
 878
 879 //  Drawing is done in DrawVZERO.C
 880
 881    AliDebug(2,"DrawModule");
 882 }
 883
 884 //_____________________________________________________________________________
 885 void AliVZEROv5::Init()
 886 {
 887 // Initialises version 2 of the VZERO Detector
 888 // Just prints an information message
 889
 890    AliInfo(Form("VZERO version %d initialized \n",IsVersion()));
 891
 892 //   gMC->SetMaxStep(fMaxStepAlu);
 893 //   gMC->SetMaxStep(fMaxStepQua);
 894
 895     AliVZERO::Init();
 896 }
 897
 898 //_____________________________________________________________________________
 899 void AliVZEROv5::StepManager()
 900 {
 901
 902 // Step Manager, called at each step
 903
 904      Int_t     copy;
 905      static    Int_t   vol[4];
 906      static    Float_t hits[21];
 907      static    Float_t eloss, tlength;
 908      static    Int_t   nPhotonsInStep;
 909      static    Int_t   nPhotons;
 910      static    Int_t   numStep;
 911      Float_t   ringNumber;
 912      Float_t   destep, step;
 913
 914      numStep += 1;
 915
 916 //   We keep only charged tracks :
 917
 918      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 919
 920      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 921      vol[2]    = gMC->CurrentVolID(copy);
 922      vol[3]    = copy;
 923
 924      static Int_t idV0R1 = gMC->VolId("V0R1");
 925      static Int_t idV0L1 = gMC->VolId("V0L1");
 926      static Int_t idV0R2 = gMC->VolId("V0R2");
 927      static Int_t idV0L2 = gMC->VolId("V0L2");
 928      static Int_t idV0R3 = gMC->VolId("V0R3");
 929      static Int_t idV0L3 = gMC->VolId("V0L3");
 930      static Int_t idV0R4 = gMC->VolId("V0R4");
 931      static Int_t idV0L4 = gMC->VolId("V0L4");
 932      static Int_t idV0R5 = gMC->VolId("V0R5");
 933      static Int_t idV0R6 = gMC->VolId("V0R6");
 934
 935      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 936                gMC->CurrentVolID(copy) == idV0L1 )
 937                ringNumber = 1.0;
 938      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 939                gMC->CurrentVolID(copy) == idV0L2 )
 940                ringNumber = 2.0;
 941      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 942                gMC->CurrentVolID(copy) == idV0R4 ||
 943                gMC->CurrentVolID(copy) == idV0L3 )
 944                ringNumber = 3.0;
 945      else if ( gMC->CurrentVolID(copy) == idV0R5 ||
 946                gMC->CurrentVolID(copy) == idV0R6 ||
 947                gMC->CurrentVolID(copy) == idV0L4 )
 948                ringNumber = 4.0;
 949      else
 950                ringNumber = 0.0;
 951
 952      if  (  ringNumber > 0.5  ) {
 953
 954         destep    = gMC->Edep();
 955         step      = gMC->TrackStep();
 956
 957         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 958         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 959
 960         eloss    += destep;
 961         tlength  += step;
 962
 963         if  ( gMC->IsTrackEntering()  )  {
 964
 965             nPhotons  =  nPhotonsInStep;
 966             gMC->TrackPosition(fTrackPosition);
 967             gMC->TrackMomentum(fTrackMomentum);
 968
 969             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 970                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 971
 972             hits[0]  = fTrackPosition.X();
 973             hits[1]  = fTrackPosition.Y();
 974             hits[2]  = fTrackPosition.Z();
 975             hits[3]  = Float_t (gMC->TrackPid());
 976
 977             hits[4]  = gMC->TrackTime();
 978             hits[5]  = gMC->TrackCharge();
 979             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 980             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 981             hits[8]  = ringNumber;
 982
 983             hits[9]  = pt;
 984             hits[10] = fTrackMomentum.P();
 985             hits[11] = fTrackMomentum.Px();
 986             hits[12] = fTrackMomentum.Py();
 987             hits[13] = fTrackMomentum.Pz();
 988
 989             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 990             hits[14] = par->Vx();
 991             hits[15] = par->Vy();
 992             hits[16] = par->Vz();
 993
 994             tlength  = 0.0;
 995             eloss    = 0.0;
 996          }
 997
 998          nPhotons  = nPhotons + nPhotonsInStep;
 999
1000          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1001
1002          nPhotons  = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
1003          nPhotons  = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
1004
1005          hits[17] =   eloss;
1006          hits[18] = tlength;
1007          hits[19] = nPhotons;
1008          hits[20] = GetCellId (vol, hits);
1009
1010          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
1011
1012          tlength         = 0.0;
1013          eloss           = 0.0;
1014          nPhotons        =   0;
1015          nPhotonsInStep  =   0;
1016
1017          numStep         =   0;
1018          }
1019     }
1020
1021 }
1022
1023 //_____________________________________________________________________________
1024 void AliVZEROv5::AddHit(Int_t track, Int_t *vol, Float_t *hits)
1025 {
1026
1027 //  Adds a VZERO hit
1028
1029   TClonesArray &lhits = *fHits;
1030   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
1031 }
1032
1033 //_____________________________________________________________________________
1034 void AliVZEROv5::AddDigits(Int_t *tracks, Int_t* digits)
1035 {
1036
1037 //  Adds a VZERO digit
1038
1039    TClonesArray  &ldigits = *fDigits;
1040    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1041 }
1042
1043 //_____________________________________________________________________________
1044 void AliVZEROv5::MakeBranch(Option_t *option)
1045 {
1046
1047 // Creates new branches in the current Root Tree
1048
1049   char branchname[10];
1050   sprintf(branchname,"%s",GetName());
1051   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
1052
1053   const char *cH = strstr(option,"H");
1054
1055   if (fHits   && TreeH() && cH) {
1056     TreeH()->Branch(branchname,&fHits, fBufferSize);
1057     AliDebug(2,Form("Making Branch %s for hits",branchname));
1058   }
1059
1060   const char *cD = strstr(option,"D");
1061
1062   if (fDigits   && fLoader->TreeD() && cD) {
1063     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1064     AliDebug(2,Form("Making Branch %s for digits",branchname));
1065   }
1066
1067 }
1068
1069 //_____________________________________________________________________________
1070 Int_t AliVZEROv5::GetCellId(Int_t *vol, Float_t *hits)
1071 {
1072
1073   //   Returns Id of scintillator cell
1074   //   Right side from  0 to 47
1075   //   Left  side from 48 to 95
1076
1077   //   hits[8] = ring number (1 to 4)
1078   //   vol[1]  = copy number (1 to 8)
1079
1080    Int_t index      = vol[1];
1081    Int_t RingNumber = Int_t(hits[8]);
1082    fCellId          = 0;
1083
1084 //    cout << "volID = " << vol[0] << "  copy = " << vol[1] << endl;
1085 //    cout << "X     = " << hits[0] << "    Y = " << hits[1] << endl;
1086
1087    Float_t phi = Float_t(TMath::ATan2(Double_t(hits[1]),Double_t(hits[0])) );
1088    Float_t kRaddeg = 180.0/TMath::Pi();
1089    phi = kRaddeg * phi;
1090
1091    if (index < 7) index = index + 8;
1092
1093    if (hits[2] < 0.0) {
1094       if(RingNumber < 3) {
1095          index = (index - 7) + ( ( RingNumber - 1 ) * 8);}
1096       else if(RingNumber >= 3){
1097        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R3")||
1098           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R5") )
1099          {index = (index*2 - 14) + ( ( RingNumber - 2 ) * 16); }
1100        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R4")||
1101           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R6") )
1102          {index = (index*2 - 13) + ( ( RingNumber - 2 ) * 16); }
1103       }
1104       fCellId   = index;
1105    }
1106
1107    else if (hits[2] > 0.0){
1108       index = (index - 7 + 48) + ( ( RingNumber - 1 ) * 8);
1109       fCellId   = index;}
1110
1111 //    cout << " ring   = " << RingNumber << " phi = "<<  phi << endl;
1112 //    cout << " cellID = " << fCellId <<  endl;
1113 //    cout <<  "**********" << endl;
1114
1115    return fCellId;
1116
1117
1118 }