VZERO/AliVZEROv5.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   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  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 <TGeant3.h>
  39 #include <TGeometry.h>
  40 #include <TLorentzVector.h>
  41 #include <TMath.h>
  42 #include <TNode.h>
  43 #include <TObjectTable.h>
  44 #include <TTUBE.h>
  45 #include <TTUBS.h>
  46 #include <TVirtualMC.h>
  47 #include <TParticle.h>
  48
  49 // --- AliRoot header files ---
  50 #include "AliRun.h"
  51 #include "AliMC.h"
  52 #include "AliConst.h"
  53 #include "AliMagF.h"
  54 #include "AliVZEROLoader.h"
  55 #include "AliVZEROdigit.h"
  56 #include "AliVZEROhit.h"
  57 #include "AliVZEROv5.h"
  58
  59 ClassImp(AliVZEROv5)
  60
  61 //_____________________________________________________________________________
  62 AliVZEROv5:: AliVZEROv5():AliVZERO()
  63 {
  64 // Standard default constructor
  65 }
  66
  67 //_____________________________________________________________________________
  68 AliVZEROv5::AliVZEROv5(const char *name, const char *title):
  69  AliVZERO(name,title)
  70 {
  71
  72 // Standard constructor for V-zero Detector  version 5
  73
  74   Int_t i;
  75
  76   printf("\n");
  77   for(i=0;i<26;i++) printf("*");
  78   printf(" Create VZERO object ");
  79   for(i=0;i<26;i++) printf("*");
  80   printf("\n");
  81
  82   fLightYield              =  93.75; // Light yield in BC408 (93.75 eV per photon)
  83   fLightAttenuation        =   0.05; // Light attenuation in fiber (0.05 per meter)
  84   fnMeters                 =   15.0; // Number of meters of clear fibers to PM
  85   fFibToPhot               =    0.3; // Attenuation at fiber-photocathode interface
  86 }
  87
  88 //_____________________________________________________________________________
  89 void AliVZEROv5::CreateGeometry()
  90 {
  91
  92 // Creates the GEANT geometry of the V-zero Detector  version 5
  93
  94   Int_t i;
  95
  96   printf("\n");
  97   for(i=0;i<26;i++) printf("*");
  98   printf(" Create VZERO Geometry ");
  99   for(i=0;i<26;i++) printf("*");
 100   printf("\n");
 101
 102   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 103
 104   Int_t    ndetR = 1;
 105   Int_t    ndetL = 1;
 106
 107   Int_t    ncellsR = 1;
 108   Int_t    ncellsL = 1;
 109
 110   Int_t    idrotm[999];
 111
 112   Float_t  height1Right, height2Right, height3Right, height4Right;
 113   Float_t  heightRight;
 114   Float_t  theta;
 115
 116   Float_t  halfThickQua;
 117
 118   Float_t  zdet;
 119   Float_t  r0Right, r4Right, rBoxRight;
 120   Float_t  pi = TMath::Pi();
 121
 122   height1Right    =     2.6;  // height of cell 1, in cm
 123   height2Right    =     4.6;  // height of cell 2, in cm
 124   height3Right    =     7.6;  // height of cell 3, in cm
 125   height4Right    =    12.7;  // height of cell 4, in cm
 126
 127   theta       = pi/4.0/2.0;       // half angular opening = 22.5 degrees
 128
 129   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 130
 131 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 132 // absorber nose sitting at 90 cm. Will use -zdet later...
 133 // size of V0R box (fThickness) is increased by 3 mm as compared to basic version
 134
 135   fThickness  =    fThickness + 0.3;             // now 4.7 cm instead of 4.4 cm
 136   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 137   r0Right     =    4.20;          // closest distance to center of the beam pipe
 138   heightRight =    height1Right + height2Right + height3Right + height4Right;
 139   r4Right     =    r0Right + heightRight + 0.3;
 140   rBoxRight   =    38.0;          // external radius of right box
 141
 142 // Creation of mother volume v0LE - left part - :
 143 // Entrance face at  +339.0 cm  (new coordinate system) ...
 144
 145    Float_t   partube[3];
 146
 147    partube[0] =  4.3;
 148    partube[1] = 44.0;
 149    partube[2] = fThickness1/2.0;
 150
 151    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 152
 153 // Creation of five rings - left part - :
 154 // Entrance face at +339.0 cm  (new coordinate system) ...
 155
 156 // Mother volume v0L0 in which will be set 5 scintillator cells
 157
 158   Float_t   partubs[5];
 159
 160   Float_t   r0Left      =   4.3;
 161   Float_t   height1Left =   3.3;
 162   Float_t   height2Left =   6.2;
 163   Float_t   height3Left =   8.9;
 164   Float_t   height4Left =  20.9;
 165   Float_t   heightLeft  =   height1Left + height2Left + height3Left + height4Left;
 166
 167   Float_t   r4Left      =   r0Left  + heightLeft;
 168
 169   partubs[0]     =  r0Left;
 170   partubs[1]     =  r4Left;
 171   partubs[2]     =  fThickness1/2.0;
 172   partubs[3]     =  90.0-22.5;
 173   partubs[4]     = 135.0-22.5;
 174
 175   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 176
 177   Float_t  r1Left =  r0Left + height1Left;
 178
 179   partubs[0]     =  r0Left;
 180   partubs[1]     =  r1Left;
 181
 182   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 183   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 184
 185   Float_t  r2Left  =  r1Left + height2Left;
 186
 187   partubs[0]     =  r1Left;
 188   partubs[1]     =  r2Left;
 189
 190   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 191   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 192
 193   Float_t  r3Left  =  r2Left + height3Left;
 194
 195   partubs[0]     =  r2Left;
 196   partubs[1]     =  r3Left;
 197
 198   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 199   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 200
 201   partubs[0]     =  r3Left;
 202   partubs[1]     =  r4Left;
 203
 204   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 205   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 206
 207 // Creation of mother volume v0RI - right part - :
 208
 209   partube[0] = r0Right - 0.2;
 210   partube[1] = r4Right + 1.0;
 211   partube[2] = fThickness/2.0;
 212
 213   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 214
 215 // Creation of  carbon lids (3.0 mm thick) to keep v0RI box shut...
 216
 217   Float_t  lidThickness = 0.30;
 218
 219   partube[0] =   r0Right;
 220   partube[1] =   rBoxRight;
 221   partube[2] =   +lidThickness/2.0;
 222
 223   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 224   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 225   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 226
 227 // Creation of aluminum rings 3.0 mm thick to maintain the v0RI pieces ...
 228
 229   partube[0] =   r0Right;
 230   partube[1] =   r0Right + 0.3;
 231   partube[2] =   +fThickness/2.0;
 232
 233   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 234   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 235
 236   partube[0] =   rBoxRight - 0.3;
 237   partube[1] =   rBoxRight;
 238   partube[2] =   +fThickness/2.0;
 239
 240   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 241   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 242
 243 // Mother volume v0R0 in which will be set 6 scintillator cells
 244
 245   partubs[0]      =  r0Right;
 246   partubs[1]      =  r4Right;
 247   partubs[2]      =  fThickness/2.0;
 248   partubs[3]      =  90.0-22.5;
 249   partubs[4]      = 135.0-22.5;
 250
 251   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 252
 253 // Elementary cell of ring 1 :
 254 // (cells of ring 1 will be shifted by 2.0 cm backwards to output fibers)
 255
 256   Float_t   offsetFibers  =  1.0;
 257   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 258   Float_t   r1Right       =  r0Right + 0.3 + height1Right;
 259
 260   partubs[0]     =  r0Right + 0.3;
 261   partubs[1]     =  r1Right;
 262   partubs[2]     =  fThickness1/2.0;
 263
 264   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 265   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 266
 267 // Elementary cell of ring 2 :
 268 // (cells of ring 2 will be shifted by 1.0 cm backwards to output fibers)
 269
 270   Float_t   r2Right   =  r1Right + height2Right;
 271
 272   partubs[0]     =  r1Right;
 273   partubs[1]     =  r2Right;
 274
 275   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 276   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 277
 278 // Elementary cell of ring 3 :
 279
 280   Float_t   r3Right   =  r2Right + height3Right;
 281
 282   partubs[0]     =  r2Right;
 283   partubs[1]     =  r3Right;
 284   partubs[3]     =  90.0-22.5;
 285   partubs[4]     = 112.5-22.5;
 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   partubs[3]     = 112.5-22.5;
 291   partubs[4]     = 135.0-22.5;
 292   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 293   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 294
 295 // Elementary cell of ring 4 :
 296
 297   partubs[0]     =  r3Right;
 298   partubs[1]     =  r4Right;
 299   partubs[3]     =  90.0-22.5;
 300   partubs[4]     = 112.5-22.5;
 301
 302   gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 303   gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 304
 305   partubs[3]     = 112.5-22.5;
 306   partubs[4]     = 135.0-22.5;
 307   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 308   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 309
 310   Float_t  phiDeg = 180./4.;
 311
 312 // Right part :
 313
 314   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 315       {
 316         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 317         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 318                           0.0,0.0,idrotm[902],"ONLY");
 319         ndetR++;
 320        }
 321
 322   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 323
 324   ncellsR = (ndetR - 1) * 6;
 325   printf("    Number of cells on Right side =   %d\n",  ncellsR);
 326
 327 // Left part :
 328
 329   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 330       {
 331         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 332         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 333                           0.0,0.0,idrotm[902],"ONLY");
 334         ndetL++;
 335        }
 336
 337   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,339.0+fThickness1/2.0,0,"ONLY");
 338
 339   ncellsL = (ndetL - 1) * 4;
 340   printf("    Number of cells on Left side  =   %d\n",  ncellsL);
 341   for(i=0;i<75;i++) printf("*");
 342   printf("\n");
 343
 344 }
 345
 346 //_____________________________________________________________________________
 347 void AliVZEROv5::BuildGeometry()
 348 {
 349
 350 // Builds simple ROOT TNode geometry for event display
 351
 352   Int_t i;
 353
 354   printf("\n");
 355   for(i=0;i<30;i++) printf("*");
 356   printf(" VZERO BuildGeometry ");
 357   for(i=0;i<30;i++) printf("*");
 358   printf("\n");
 359
 360   TNode *top;
 361
 362   TNode *v0Rnode,  *v0Rnode0, *v0Rnode7, *v0Rnode8, *v0Rnode9, *v0Rnode10;
 363   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3, *v0Rnode4, *v0Rnode5, *v0Rnode6;
 364   TNode *v0Lnode, *v0Lnode0;
 365   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3, *v0Lnode4;
 366
 367   const int kColorVZERO  = kGreen;
 368
 369   top = gAlice->GetGeometry()->GetNode("alice");
 370
 371   Float_t  height1Right, height2Right, height3Right, height4Right;
 372   Float_t  heightRight;
 373   Float_t  theta;
 374
 375   Float_t  halfThickQua;
 376   Float_t  zdet;
 377   Float_t  r0Right, r4Right, rBoxRight;
 378   Float_t  pi = TMath::Pi();
 379
 380   height1Right      =     2.6;  // height of cell 1, in cm
 381   height2Right      =     4.6;  // height of cell 2, in cm
 382   height3Right      =     7.6;  // height of cell 3, in cm
 383   height4Right      =    12.7;  // height of cell 4, in cm
 384
 385   theta             =    pi/4.0/2.0;
 386
 387   halfThickQua      =    fThickness1/2.0;
 388
 389   zdet              =    90.0 - 0.6 - fThickness/2.0;
 390   r0Right           =    4.20;
 391   heightRight       =    height1Right + height2Right + height3Right + height4Right;
 392   r4Right           =    r0Right + heightRight + 0.3;
 393   rBoxRight         =    38.0;
 394
 395   Int_t     ndiv    =     1;
 396
 397   Float_t   partube[3];
 398
 399   partube[0] =  r0Right - 0.2;
 400   partube[1] =  r4Right + 1.0;
 401   partube[2] = fThickness/2.0;
 402
 403   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 404
 405   top->cd();
 406
 407   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 408
 409   v0Rnode->SetLineColor(kYellow);
 410   fNodes->Add(v0Rnode);
 411   v0Rnode->SetVisibility(2);
 412
 413 // Rondelles de carbone (epaisseur 3.0 mm) de maintien des cellules ...
 414
 415   Float_t  lidThickness = 0.30;
 416
 417   partube[0] =   r0Right;
 418   partube[1] =   rBoxRight;
 419   partube[2] =   +lidThickness/2.0;
 420
 421   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 422
 423   v0Rnode->cd();
 424   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 425   v0Rnode7->SetLineColor(kYellow);
 426   fNodes->Add(v0Rnode7);
 427   v0Rnode->cd();
 428   v0Rnode8 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 429   v0Rnode8->SetLineColor(kYellow);
 430   fNodes->Add(v0Rnode8);
 431
 432   partube[0] =   r0Right;
 433   partube[1] =   r0Right + 0.3;
 434   partube[2] =   +fThickness/2.0;
 435
 436   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 437
 438   v0Rnode->cd();
 439   v0Rnode9 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 440   v0Rnode9->SetLineColor(kYellow);
 441   fNodes->Add(v0Rnode9);
 442
 443   partube[0] =   rBoxRight - 0.3;
 444   partube[1] =   rBoxRight;
 445   partube[2] =   +fThickness/2.0;
 446
 447   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 448
 449   v0Rnode->cd();
 450   v0Rnode10 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 451   v0Rnode10->SetLineColor(kYellow);
 452   fNodes->Add(v0Rnode10);
 453
 454   Float_t   partubs[5];
 455
 456   partubs[0]      =  r0Right;
 457   partubs[1]      =  r4Right;
 458   partubs[2]      =  fThickness/2.0;
 459   partubs[3]      =  90.0-22.5;
 460   partubs[4]      = 135.0-22.5;
 461
 462   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 463                                                   partubs[3], partubs[4]);
 464
 465   v0R0->SetNumberOfDivisions(ndiv);
 466
 467   Float_t   r1Right =  r0Right + 0.3 + height1Right;
 468   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 469   Float_t   offsetFibers = 1.0;
 470
 471   partubs[0]     =  r0Right + 0.3;
 472   partubs[1]     =  r1Right;
 473   partubs[2]     =  fThickness1/2.0;
 474
 475   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 476                                                   partubs[3], partubs[4]);
 477
 478   v0R1->SetNumberOfDivisions(ndiv);
 479
 480   Float_t   r2Right  =  r1Right + height2Right;
 481
 482   partubs[0]     =  r1Right;
 483   partubs[1]     =  r2Right;
 484
 485   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 486                                                   partubs[3], partubs[4]);
 487
 488   v0R2->SetNumberOfDivisions(ndiv);
 489
 490 // Ring 3 :
 491
 492   Float_t   r3Right  =  r2Right + height3Right;
 493
 494   partubs[0]     =  r2Right;
 495   partubs[1]     =  r3Right;
 496   partubs[3]     =  90.0-22.5;
 497   partubs[4]     = 112.5-22.5;
 498
 499   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 500                                                   partubs[3], partubs[4]);
 501   v0R3->SetNumberOfDivisions(ndiv);
 502
 503   partubs[3]     = 112.5-22.5;
 504   partubs[4]     = 135.0-22.5;
 505
 506   TTUBS *v0R4 = new TTUBS("V0R4", "V0R4", "void", partubs[0], partubs[1], partubs[2],
 507                                                   partubs[3], partubs[4]);
 508   v0R4->SetNumberOfDivisions(ndiv);
 509
 510 // Ring 4 :
 511
 512   partubs[0]     =  r3Right;
 513   partubs[1]     =  r4Right;
 514   partubs[3]     =  90.0-22.5;
 515   partubs[4]     = 112.5-22.5;
 516
 517   TTUBS *v0R5 = new TTUBS("V0R5", "V0R5", "void", partubs[0], partubs[1], partubs[2],
 518                                                   partubs[3], partubs[4]);
 519   v0R5->SetNumberOfDivisions(ndiv);
 520
 521   partubs[3]     = 112.5-22.5;
 522   partubs[4]     = 135.0-22.5;
 523
 524   TTUBS *v0R6 = new TTUBS("V0R6", "V0R6", "void", partubs[0], partubs[1], partubs[2],
 525                                                   partubs[3], partubs[4]);
 526   v0R6->SetNumberOfDivisions(ndiv);
 527
 528   Float_t  phi;
 529   Float_t  phiDeg= 180./4.;
 530
 531   Int_t    ndetR = 1;
 532
 533   char     nameNode[12];
 534
 535   for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 536
 537   {
 538     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 539
 540     sprintf(nameNode,"SUBDER%d",ndetR);
 541
 542     v0Rnode->cd();
 543     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 544     v0Rnode0->SetLineColor(kYellow);
 545     fNodes->Add(v0Rnode0);
 546     ndetR++;
 547
 548     sprintf(nameNode,"SUBDER%d",ndetR);
 549     v0Rnode0->cd();
 550     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset ,0);
 551     v0Rnode1->SetLineColor(kColorVZERO);
 552     fNodes->Add(v0Rnode1);
 553     ndetR++;
 554
 555     sprintf(nameNode,"SUBDER%d",ndetR);
 556     v0Rnode0->cd();
 557     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset + offsetFibers,0);
 558     v0Rnode2->SetLineColor(kColorVZERO);
 559     fNodes->Add(v0Rnode2);
 560     ndetR++;
 561
 562     sprintf(nameNode,"SUBDER%d",ndetR);
 563     v0Rnode0->cd();
 564     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset + 2.0*offsetFibers,0);
 565     v0Rnode3->SetLineColor(kColorVZERO);
 566     fNodes->Add(v0Rnode3);
 567     ndetR++;
 568
 569     sprintf(nameNode,"SUBDER%d",ndetR);
 570     v0Rnode0->cd();
 571     v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset + 2.0*offsetFibers,0);
 572     v0Rnode4->SetLineColor(kColorVZERO);
 573     fNodes->Add(v0Rnode4);
 574     ndetR++;
 575
 576     sprintf(nameNode,"SUBDER%d",ndetR);
 577     v0Rnode0->cd();
 578     v0Rnode5 = new TNode(nameNode,nameNode,v0R5,0.0,0.0, -offset + 2.0*offsetFibers,0);
 579     v0Rnode5->SetLineColor(kColorVZERO);
 580     fNodes->Add(v0Rnode5);
 581     ndetR++;
 582
 583     sprintf(nameNode,"SUBDER%d",ndetR);
 584     v0Rnode0->cd();
 585     v0Rnode6 = new TNode(nameNode,nameNode,v0R6,0.0,0.0, -offset + 2.0*offsetFibers,0);
 586     v0Rnode6->SetLineColor(kColorVZERO);
 587     fNodes->Add(v0Rnode6);
 588     ndetR++;
 589
 590     v0Rnode0->SetVisibility(2);
 591   }
 592
 593 // Left side of VZERO :
 594
 595   Float_t   r0Left      =    4.3;
 596   Float_t   height1Left =    3.3;
 597   Float_t   height2Left =    6.2;
 598   Float_t   height3Left =    8.9;
 599   Float_t   height4Left =   20.9;
 600   Float_t   heightLeft  = height1Left + height2Left + height3Left + height4Left;
 601
 602   Float_t   r4Left      = r0Left  + heightLeft;
 603
 604   partube[0] =  r0Left;
 605   partube[1] =  r4Left;
 606   partube[2] =  fThickness1/2.0;
 607
 608   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 609
 610   top->cd();
 611
 612   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,339.0+fThickness1/2.0,0);
 613
 614   v0Lnode->SetLineColor(kBlue);
 615   fNodes->Add(v0Lnode);
 616
 617   v0Lnode->SetVisibility(2);
 618
 619   partubs[0]      =  r0Left;
 620   partubs[1]      =  r4Left;
 621   partubs[2]      =  fThickness1/2.0;
 622   partubs[3]      =  90.0-22.5;
 623   partubs[4]      = 135.0-22.5;
 624
 625   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 626                                                   partubs[3], partubs[4]);
 627
 628   v0L0->SetNumberOfDivisions(ndiv);
 629   v0L0->SetLineColor(7);
 630
 631   Float_t   offsetLeft;
 632   offsetLeft    = - fThickness1/2.0;
 633
 634   Float_t   r1Left =  r0Left + height1Left;
 635
 636   partubs[0]     =  r0Left;
 637   partubs[1]     =  r1Left;
 638
 639   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 640                                                   partubs[3], partubs[4]);
 641   v0L1->SetNumberOfDivisions(ndiv);
 642
 643   Float_t   r2Left =  r1Left + height2Left;
 644
 645   partubs[0]     =  r1Left;
 646   partubs[1]     =  r2Left;
 647
 648   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 649                                                   partubs[3], partubs[4]);
 650   v0L2->SetNumberOfDivisions(ndiv);
 651
 652   Float_t   r3Left =  r2Left + height3Left;
 653
 654   partubs[0]     =  r2Left;
 655   partubs[1]     =  r3Left;
 656
 657   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 658                                                   partubs[3], partubs[4]);
 659   v0L3->SetNumberOfDivisions(ndiv);
 660
 661   partubs[0]     =  r3Left;
 662   partubs[1]     =  r4Left;
 663
 664   TTUBS *v0L4 = new TTUBS("V0L4", "V0L4", "void", partubs[0], partubs[1], partubs[2],
 665                                                   partubs[3], partubs[4]);
 666   v0L4->SetNumberOfDivisions(ndiv);
 667
 668   Int_t    ndetL   = 1;
 669
 670   for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 671
 672   {
 673
 674     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 675
 676     sprintf(nameNode,"SUBDEL%d",ndetL);
 677
 678     v0Lnode->cd();
 679     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 680     v0Lnode0->SetLineColor(kColorVZERO);
 681     fNodes->Add(v0Lnode0);
 682     ndetL++;
 683
 684     sprintf(nameNode,"SUBDEL%d",ndetL);
 685     v0Lnode0->cd();
 686     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 687     v0Lnode1->SetLineColor(kColorVZERO);
 688     fNodes->Add(v0Lnode1);
 689     ndetL++;
 690
 691     sprintf(nameNode,"SUBDEL%d",ndetL);
 692     v0Lnode0->cd();
 693     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 694     v0Lnode2->SetLineColor(kColorVZERO);
 695     fNodes->Add(v0Lnode2);
 696     ndetL++;
 697
 698     sprintf(nameNode,"SUBDEL%d",ndetL);
 699     v0Lnode0->cd();
 700     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 701     v0Lnode3->SetLineColor(kColorVZERO);
 702     fNodes->Add(v0Lnode3);
 703     ndetL++;
 704
 705     sprintf(nameNode,"SUBDEL%d",ndetL);
 706     v0Lnode0->cd();
 707     v0Lnode4 = new TNode(nameNode,nameNode,v0L4,0.0,0.0, 0.0,0);
 708     v0Lnode4->SetLineColor(kColorVZERO);
 709     fNodes->Add(v0Lnode4);
 710     ndetL++;
 711
 712     v0Lnode0->SetVisibility(2);
 713   }
 714 }
 715
 716 //_____________________________________________________________________________
 717 void AliVZEROv5::CreateMaterials()
 718 {
 719
 720 // Creates materials used for geometry
 721
 722     Int_t i;
 723
 724     printf("\n");
 725     for(i=0;i<25;i++) printf("*");
 726     printf(" VZERO create materials ");
 727     for(i=0;i<26;i++) printf("*");
 728     printf("\n");
 729
 730 /*
 731     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,
 732                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 733
 734
 735     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,
 736                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 737
 738     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 739                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 740                                  1.662295, 1.68337 };
 741
 742     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 743                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 744
 745     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 746
 747
 748     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 749
 750
 751     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,
 752                                1e-4,1e-4,1e-4,1e-4 };
 753     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 754
 755 */
 756
 757     Int_t *idtmed = fIdtmed->GetArray()-2999;
 758
 759 //    TGeant3 *geant3 = (TGeant3*) gMC;
 760
 761 //  Parameters related to Quarz (SiO2) :
 762
 763     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 764     Int_t nlmatqua;
 765
 766     aqua[0]    = 28.09;
 767     aqua[1]    = 16.;
 768     zqua[0]    = 14.;
 769     zqua[1]    = 8.;
 770     densqua    = 2.64;
 771     nlmatqua   = -2;
 772     wmatqua[0] = 1.;
 773     wmatqua[1] = 2.;
 774
 775 // Parameters  related to aluminum sheets :
 776
 777     Float_t  aal   = 26.98;
 778     Float_t  zal   = 13.00;
 779     Float_t  densal=   2.7;
 780     Float_t  radlal=   8.9;
 781
 782 // Parameters  related to scintillator CH :
 783
 784     Float_t ascin[2] = {1.00794,12.011};
 785     Float_t zscin[2] = {1.,6.};
 786     Float_t wscin[2] = {1.,1.};
 787     Float_t denscin  = 1.032;
 788
 789 // AIR
 790
 791     Float_t aAir[4]={12.,14.,16.,36.};
 792     Float_t zAir[4]={6.,7.,8.,18.};
 793     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 794     Float_t dAir = 1.20479E-3;
 795
 796 //  Definition of materials :
 797
 798     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 799     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 800     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 801     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 802     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 803     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 804
 805     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 806
 807
 808     Int_t   iSXFLD = gAlice->Field()->Integ();
 809     Float_t sXMGMX = gAlice->Field()->Max();
 810
 811     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 812
 813     tmaxfd = 10.;
 814     stemax = 0.1;
 815     deemax = 0.1;
 816     epsil  = 0.001;
 817     stmin  = 0.001;
 818
 819 //  Active Air :
 820     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 821               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 822
 823 //  Inactive air :
 824
 825     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 826               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 827
 828     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 829               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 830
 831     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 832               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 833
 834     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 835               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 836
 837
 838     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 839               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 840
 841     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 842
 843     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 844     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 845     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 846     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 847
 848     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 849     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 850     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 851     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 852
 853     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 854     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 855     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 856     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 857     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 858     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 859
 860     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 861     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 862     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 863     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 864
 865     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 866     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 867     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 868     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 869     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 870     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 871
 872     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 873     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 874     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 875     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 876     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 877     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 878
 879
 880 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 881 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 882
 883 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 884 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 885
 886 }
 887
 888 //_____________________________________________________________________________
 889 void AliVZEROv5::DrawModule()
 890 {
 891
 892 //  Drawing is done in DrawVZERO.C
 893
 894    Int_t i;
 895
 896    printf("\n");
 897    for(i=0;i<30;i++) printf("*");
 898    printf(" VZERO DrawModule ");
 899    for(i=0;i<30;i++) printf("*");
 900    printf("\n");
 901 }
 902
 903 //_____________________________________________________________________________
 904 void AliVZEROv5::Init()
 905 {
 906 // Initialises version 2 of the VZERO Detector
 907 // Just prints an information message
 908
 909    printf(" VZERO version %d initialized \n",IsVersion());
 910
 911 //   gMC->SetMaxStep(fMaxStepAlu);
 912 //   gMC->SetMaxStep(fMaxStepQua);
 913
 914     AliVZERO::Init();
 915 }
 916
 917 //_____________________________________________________________________________
 918 void AliVZEROv5::StepManager()
 919 {
 920
 921 // Step Manager, called at each step
 922
 923      Int_t     copy;
 924      static    Int_t   vol[4];
 925      static    Float_t hits[21];
 926      static    Float_t eloss, tlength;
 927      static    Int_t   nPhotonsInStep;
 928      static    Int_t   nPhotons;
 929      static    Int_t   numStep;
 930      Float_t   ringNumber;
 931      Float_t   destep, step;
 932
 933      numStep += 1;
 934
 935 //   We keep only charged tracks :
 936
 937      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 938
 939      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 940      vol[2]    = gMC->CurrentVolID(copy);
 941      vol[3]    = copy;
 942
 943      if      ( gMC->CurrentVolID(copy) == gMC->VolId("V0R1") ||
 944                gMC->CurrentVolID(copy) == gMC->VolId("V0L1") )
 945                ringNumber = 1.0;
 946      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R2") ||
 947                gMC->CurrentVolID(copy) == gMC->VolId("V0L2") )
 948                ringNumber = 2.0;
 949      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R3") ||
 950                gMC->CurrentVolID(copy) == gMC->VolId("V0R4") ||
 951                gMC->CurrentVolID(copy) == gMC->VolId("V0L3") )
 952                ringNumber = 3.0;
 953      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R5") ||
 954                gMC->CurrentVolID(copy) == gMC->VolId("V0R6") ||
 955                gMC->CurrentVolID(copy) == gMC->VolId("V0L4") )
 956                ringNumber = 4.0;
 957      else
 958                ringNumber = 0.0;
 959
 960      if  (  ringNumber > 0.5  ) {
 961
 962         destep    = gMC->Edep();
 963         step      = gMC->TrackStep();
 964
 965         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 966         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 967
 968         eloss    += destep;
 969         tlength  += step;
 970
 971         if  ( gMC->IsTrackEntering()  )  {
 972
 973             nPhotons  =  nPhotonsInStep;
 974             gMC->TrackPosition(fTrackPosition);
 975             gMC->TrackMomentum(fTrackMomentum);
 976
 977             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 978                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 979
 980             hits[0]  = fTrackPosition.X();
 981             hits[1]  = fTrackPosition.Y();
 982             hits[2]  = fTrackPosition.Z();
 983             hits[3]  = Float_t (gMC->TrackPid());
 984
 985             hits[4]  = gMC->TrackTime();
 986             hits[5]  = gMC->TrackCharge();
 987             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 988             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 989             hits[8]  = ringNumber;
 990
 991             hits[9]  = pt;
 992             hits[10] = fTrackMomentum.P();
 993             hits[11] = fTrackMomentum.Px();
 994             hits[12] = fTrackMomentum.Py();
 995             hits[13] = fTrackMomentum.Pz();
 996
 997             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 998             hits[14] = par->Vx();
 999             hits[15] = par->Vy();
1000             hits[16] = par->Vz();
1001
1002             tlength  = 0.0;
1003             eloss    = 0.0;
1004          }
1005
1006          nPhotons  = nPhotons + nPhotonsInStep;
1007
1008          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1009
1010          nPhotons  = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
1011          nPhotons  = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
1012
1013          hits[17] =   eloss;
1014          hits[18] = tlength;
1015          hits[19] = nPhotons;
1016          hits[20] = GetCellId (vol, hits);
1017
1018          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
1019
1020          tlength         = 0.0;
1021          eloss           = 0.0;
1022          nPhotons        =   0;
1023          nPhotonsInStep  =   0;
1024
1025          numStep         =   0;
1026          }
1027     }
1028
1029 }
1030
1031 //_____________________________________________________________________________
1032 void AliVZEROv5::AddHit(Int_t track, Int_t *vol, Float_t *hits)
1033 {
1034
1035 //  Adds a VZERO hit
1036
1037   TClonesArray &lhits = *fHits;
1038   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
1039 }
1040
1041 //_____________________________________________________________________________
1042 void AliVZEROv5::AddDigits(Int_t *tracks, Int_t* digits)
1043 {
1044
1045 //  Adds a VZERO digit
1046
1047    TClonesArray  &ldigits = *fDigits;
1048    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1049 }
1050
1051 //_____________________________________________________________________________
1052 void AliVZEROv5::MakeBranch(Option_t *option)
1053 {
1054
1055 // Creates new branches in the current Root Tree
1056
1057   char branchname[10];
1058   sprintf(branchname,"%s",GetName());
1059   printf(" fBufferSize = %d \n",fBufferSize);
1060
1061   const char *cH = strstr(option,"H");
1062
1063   if (fHits   && TreeH() && cH) {
1064     TreeH()->Branch(branchname,&fHits, fBufferSize);
1065     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1066   }
1067
1068   const char *cD = strstr(option,"D");
1069
1070   if (fDigits   && fLoader->TreeD() && cD) {
1071     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1072     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1073   }
1074
1075 }
1076
1077 //_____________________________________________________________________________
1078 Int_t AliVZEROv5::GetCellId(Int_t *vol, Float_t *hits)
1079 {
1080
1081   //   Returns Id of scintillator cell
1082   //   Right side from  0 to 47
1083   //   Left  side from 48 to 95
1084
1085   //   hits[8] = ring number (1 to 4)
1086   //   vol[1]  = copy number (1 to 8)
1087
1088    Int_t index      = vol[1];
1089    Int_t RingNumber = Int_t(hits[8]);
1090    fCellId          = 0;
1091
1092 //    cout << "volID = " << vol[0] << "  copy = " << vol[1] << endl;
1093 //    cout << "X     = " << hits[0] << "    Y = " << hits[1] << endl;
1094
1095    Float_t phi = Float_t(TMath::ATan2(Double_t(hits[1]),Double_t(hits[0])) );
1096    Float_t kRaddeg = 180.0/TMath::Pi();
1097    phi = kRaddeg * phi;
1098
1099    if (index < 7) index = index + 8;
1100
1101    if (hits[2] < 0.0) {
1102       if(RingNumber < 3) {
1103          index = (index - 7) + ( ( RingNumber - 1 ) * 8);}
1104       else if(RingNumber >= 3){
1105        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R3")||
1106           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R5") )
1107          {index = (index*2 - 14) + ( ( RingNumber - 2 ) * 16); }
1108        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R4")||
1109           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R6") )
1110          {index = (index*2 - 13) + ( ( RingNumber - 2 ) * 16); }
1111       }
1112       fCellId   = index;
1113    }
1114
1115    else if (hits[2] > 0.0){
1116       index = (index - 7 + 48) + ( ( RingNumber - 1 ) * 8);
1117       fCellId   = index;}
1118
1119 //    cout << " ring   = " << RingNumber << " phi = "<<  phi << endl;
1120 //    cout << " cellID = " << fCellId <<  endl;
1121 //    cout <<  "**********" << endl;
1122
1123    return fCellId;
1124
1125
1126 }