VZERO/AliVZEROv2.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   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 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 <TGeant3.h>
  41 #include <TGeometry.h>
  42 #include <TLorentzVector.h>
  43 #include <TMath.h>
  44 #include <TNode.h>
  45 #include <TObjectTable.h>
  46 #include <TTUBE.h>
  47 #include <TTUBS.h>
  48 #include <TVirtualMC.h>
  49 #include <TParticle.h>
  50
  51 // --- AliRoot header files ---
  52 #include "AliRun.h"
  53 #include "AliMC.h"
  54 #include "AliConst.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   Int_t i;
  77
  78   printf("\n");
  79   for(i=0;i<26;i++) printf("*");
  80   printf(" Create VZERO object ");
  81   for(i=0;i<26;i++) printf("*");
  82   printf("\n");
  83
  84 }
  85
  86 //_____________________________________________________________________________
  87 void AliVZEROv2::CreateGeometry()
  88 {
  89
  90 // Creates the GEANT geometry of the V-zero Detector  version 2
  91
  92   Int_t i;
  93
  94   printf("\n");
  95   for(i=0;i<26;i++) printf("*");
  96   printf(" Create VZERO Geometry ");
  97   for(i=0;i<26;i++) printf("*");
  98   printf("\n");
  99
 100   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 101
 102   Int_t    ndetR = 1;
 103   Int_t    ndetL = 1;
 104
 105   Int_t    ncellsR = 1;
 106   Int_t    ncellsL = 1;
 107
 108   Int_t    idrotm[999];
 109
 110   Float_t  height1, height2, height3, height4, height5;
 111   Float_t  height;
 112   Float_t  theta;
 113
 114   Float_t  halfThickQua;
 115
 116   Float_t  zdet;
 117   Float_t  r0, r5;
 118   Float_t  pi = TMath::Pi();
 119
 120   height1     =     1.82;         // height of cell 1, in cm
 121   height2     =     3.81;         // height of cell 2, in cm
 122   height3     =     4.72;         // height of cell 3, in cm
 123   height4     =     7.12;         // height of cell 4, in cm
 124   height5     =    10.83;         // height of cell 5, in cm
 125
 126   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 127
 128   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 129
 130 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 131 // absorber nose sitting at 90 cm. Will use -zdet later...
 132
 133   zdet        =    90.0 - 0.6 -fThickness/2.0;  // distance to vertex (along Z axis)
 134   r0          =    4.05;          // closest distance to center of the beam pipe
 135   height      =    height1 + height2 + height3 + height4 + height5;
 136   r5          =    r0 + height;
 137
 138 // Creation of mother volume v0LE - left part - :
 139 // Entrance face at  +350.0 cm  (new coordinate system) ...
 140
 141    Float_t   partube[3];
 142
 143    partube[0] =  4.3;
 144    partube[1] = 45.0;
 145    partube[2] = fThickness1/2.0;
 146
 147    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 148
 149 // Creation of five rings - left part - :
 150 // Entrance face at +350.0 cm  (new coordinate system) ...
 151
 152 // Mother volume v0L0 in which will be set 5 scintillator cells
 153
 154   Float_t   partubs[5];
 155
 156   Float_t   r0Left      =   4.3;
 157   Float_t   height1Left =   2.6;
 158   Float_t   height2Left =   4.1;
 159   Float_t   height3Left =   6.4;
 160   Float_t   height4Left =  10.2;
 161   Float_t   height5Left =  16.9;
 162   Float_t   heightLeft  = height1Left + height2Left + height3Left
 163                                       + height4Left + height5Left;
 164   Float_t   r5Left      = r0Left  + heightLeft;
 165
 166   partubs[0]      =  r0Left;
 167   partubs[1]      =  r5Left;
 168   partubs[2]      =  fThickness1/2.0;
 169   partubs[3]      =  90.0-15.0;
 170   partubs[4]      = 120.0-15.0;
 171
 172   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 173
 174   Float_t  r1Left =  r0Left + height1Left;
 175
 176   partubs[0]     =  r0Left;
 177   partubs[1]     =  r1Left;
 178
 179   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 180   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 181
 182   Float_t   r2Left  =   r1Left + height2Left;
 183
 184   partubs[0]     =  r1Left;
 185   partubs[1]     =  r2Left;
 186
 187   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 188   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 189
 190   Float_t   r3Left =   r2Left + height3Left;
 191
 192   partubs[0]     =  r2Left;
 193   partubs[1]     =  r3Left;
 194
 195   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 196   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 197
 198   Float_t   r4Left =  r3Left + height4Left;
 199
 200   partubs[0]     =  r3Left;
 201   partubs[1]     =  r4Left;
 202
 203   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 204   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 205
 206   partubs[0]     =  r4Left;
 207   partubs[1]     =  r5Left;
 208   partubs[3]     =  90.0-15.0;
 209   partubs[4]     = 120.0-30.0;
 210
 211   gMC->Gsvolu("V0L5","TUBS",idtmed[3005],partubs,5);  // quartz volume
 212   gMC->Gspos("V0L5",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 213
 214   partubs[3]     = 120.0-30.0;
 215   partubs[4]     = 120.0-15.0;
 216
 217   gMC->Gsvolu("V0L6","TUBS",idtmed[3005],partubs,5);  // quartz volume
 218   gMC->Gspos("V0L6",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 219
 220
 221 // Creation of mother volume v0RI - right part - :
 222
 223   partube[0] = r0 - 0.2;
 224   partube[1] = r5 + 1.0;
 225   partube[2] = fThickness/2.0;
 226
 227   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 228
 229 // Creation of  carbon lids (2 mm thick) to keep v0RI box shut...
 230
 231   Float_t  lidThickness = 0.2;
 232
 233   partube[0] =   r0;
 234   partube[1] =   r5;
 235   partube[2] =   +lidThickness/2.0;
 236
 237   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 238   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 239   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 240
 241 // Creation of aluminum rings to maintain the v0RI pieces ...
 242
 243   partube[0] =   r0 - 0.2;
 244   partube[1] =   r0;
 245   partube[2] =   +fThickness/2.0;
 246
 247   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 248   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 249
 250   partube[0] =   r5;
 251   partube[1] =   r5 + 1.0;
 252   partube[2] =   +fThickness/2.0;
 253
 254   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 255   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 256
 257 // Mother volume v0R0 in which will be set 5  scintillator cells
 258
 259   partubs[0]      =  r0;
 260   partubs[1]      =  r5;
 261   partubs[2]      =  fThickness/2.0;
 262   partubs[3]      =  90.0-15.0;
 263   partubs[4]      = 120.0-15.0;
 264
 265   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 266
 267 // Elementary cell of ring 1 :
 268 // (cells 2 and 3  will be shifted by 1 cm to output fibers)
 269
 270   Float_t   offsetFibers  =  1.0;
 271   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 272   Float_t   r1            =  r0 + height1;
 273
 274   partubs[0]     =  r0;
 275   partubs[1]     =  r1;
 276   partubs[2]     =  fThickness1/2.0;
 277
 278   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 279   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 280
 281 // Elementary cell of ring 2 :
 282
 283   Float_t   r2   =  r1 + height2;
 284
 285   partubs[0]     =  r1;
 286   partubs[1]     =  r2;
 287
 288   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 289   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 290
 291
 292 // Elementary cell of ring 3 :
 293
 294   Float_t   r3   =  r2 + height3;
 295
 296   partubs[0]     =  r2;
 297   partubs[1]     =  r3;
 298
 299   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 300   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 301
 302 // Elementary cell of ring 4 :
 303
 304   Float_t   r4   =  r3 + height4 ;
 305
 306   partubs[0]     =  r3;
 307   partubs[1]     =  r4;
 308
 309   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 310   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 ,  -offset + 2.0 * offsetFibers, 0,"ONLY");
 311
 312 // Elementary cells of ring 5 :
 313
 314   partubs[0]     =  r4;
 315   partubs[1]     =  r5;
 316   partubs[3]     =  90.0-15.0;
 317   partubs[4]     = 120.0-30.0;
 318
 319   gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 320   gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 321
 322   partubs[3]     = 120.0-30.0;
 323   partubs[4]     = 120.0-15.0;
 324
 325   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 326   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 ,  -offset + 2.0 * offsetFibers, 0,"ONLY");
 327
 328   Float_t  phiDeg = 180./6.;
 329
 330 // Right part :
 331
 332   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 333       {
 334         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 335         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 336                           0.0,0.0,idrotm[902],"ONLY");
 337         ndetR++;
 338        }
 339
 340   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 341
 342   ncellsR = (ndetR - 1) * 6;
 343   printf("    Number of cells on Right side =   %d\n",  ncellsR);
 344
 345 // Left part :
 346
 347   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 348       {
 349         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 350         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 351                           0.0,0.0,idrotm[902],"ONLY");
 352         ndetL++;
 353        }
 354
 355   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 356
 357   ncellsL = (ndetL - 1) * 6;
 358   printf("    Number of cells on Left side  =   %d\n",  ncellsL);
 359   for(i=0;i<75;i++) printf("*");
 360   printf("\n");
 361
 362 }
 363
 364 //_____________________________________________________________________________
 365 void AliVZEROv2::BuildGeometry()
 366 {
 367
 368 // Builds simple ROOT TNode geometry for event display
 369
 370   Int_t i;
 371
 372   printf("\n");
 373   for(i=0;i<30;i++) printf("*");
 374   printf(" VZERO BuildGeometry ");
 375   for(i=0;i<30;i++) printf("*");
 376   printf("\n");
 377
 378   TNode *top;
 379
 380   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 381   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3, *v0Rnode4, *v0Rnode5;
 382   TNode *v0Lnode, *v0Lnode0;
 383   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3, *v0Lnode4, *v0Lnode5, *v0Lnode6;
 384
 385   const int kColorVZERO  = kGreen;
 386
 387   top = gAlice->GetGeometry()->GetNode("alice");
 388
 389   Float_t  height1, height2, height3, height4, height5;
 390   Float_t  height;
 391   Float_t  theta;
 392
 393   Float_t  halfThickQua;
 394   Float_t  zdet;
 395   Float_t  r0, r5;
 396   Float_t  pi = TMath::Pi();
 397
 398   height1           =     1.82;           // height of cell 1, in cm
 399   height2           =     3.81;           // height of cell 2, in cm
 400   height3           =     4.72;           // height of cell 3, in cm
 401   height4           =     7.12;           // height of cell 4, in cm
 402   height5           =    10.83;           // height of cell 5, in cm
 403
 404   theta             =    pi/6.0/2.0;
 405
 406   halfThickQua    =    fThickness1/2.0;
 407
 408   zdet              =    90.0 - 0.6 - fThickness/2.0;
 409   r0                =    4.05;
 410   height            =    height1 + height2 + height3 + height4 + height5;
 411   r5                =    r0 + height;
 412
 413   Int_t     ndiv    =     1;
 414
 415   Float_t   partube[3];
 416
 417   partube[0] =  r0 - 0.2;
 418   partube[1] =  r5 + 1.0;
 419   partube[2] = fThickness/2.0;
 420
 421   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 422
 423   top->cd();
 424
 425   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 426
 427   v0Rnode->SetLineColor(kYellow);
 428   fNodes->Add(v0Rnode);
 429   v0Rnode->SetVisibility(2);
 430
 431 // Rondelles de carbone (epaisseur 2 mm) de maintien des cellules ...
 432
 433   Float_t  lidThickness = 0.2;
 434
 435   partube[0] =   r0;
 436   partube[1] =   r5;
 437   partube[2] =   +lidThickness/2.0;
 438
 439   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 440
 441   v0Rnode->cd();
 442   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 443   v0Rnode6->SetLineColor(kYellow);
 444   fNodes->Add(v0Rnode6);
 445   v0Rnode->cd();
 446   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 447   v0Rnode7->SetLineColor(kYellow);
 448   fNodes->Add(v0Rnode7);
 449
 450   partube[0] =   r0 - 0.2;
 451   partube[1] =   r0;
 452   partube[2] =   +fThickness/2.0;
 453
 454   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 455
 456   v0Rnode->cd();
 457   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 458   v0Rnode8->SetLineColor(kYellow);
 459   fNodes->Add(v0Rnode8);
 460
 461   partube[0] =   r5;
 462   partube[1] =   r5 + 1.0;
 463   partube[2] =   +fThickness/2.0;
 464
 465   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 466
 467   v0Rnode->cd();
 468   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 469   v0Rnode9->SetLineColor(kYellow);
 470   fNodes->Add(v0Rnode9);
 471
 472   Float_t   partubs[5];
 473
 474   partubs[0]      =  r0;
 475   partubs[1]      =  r5;
 476   partubs[2]      =  fThickness/2.0;
 477   partubs[3]      =  90.0-15.0;
 478   partubs[4]      = 120.0-15.0;
 479
 480   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 481                                                   partubs[3], partubs[4]);
 482
 483   v0R0->SetNumberOfDivisions(ndiv);
 484
 485   Float_t   r1     =  r0 + height1;
 486   Float_t   offset = fThickness/2.0 - lidThickness - fThickness1/2.0;
 487   Float_t   offsetFibers = 1.0;
 488
 489   partubs[0]     =  r0;
 490   partubs[1]     =  r1;
 491   partubs[2]     =  fThickness1/2.0;
 492
 493   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 494                                                   partubs[3], partubs[4]);
 495
 496   v0R1->SetNumberOfDivisions(ndiv);
 497
 498   Float_t   r2   =  r1 + height2;
 499
 500   partubs[0]     =  r1;
 501   partubs[1]     =  r2;
 502
 503   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 504                                                   partubs[3], partubs[4]);
 505
 506   v0R2->SetNumberOfDivisions(ndiv);
 507
 508   Float_t   r3   =  r2 + height3;
 509
 510   partubs[0]     =  r2;
 511   partubs[1]     =  r3;
 512
 513   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 514                                                   partubs[3], partubs[4]);
 515   v0R3->SetNumberOfDivisions(ndiv);
 516
 517   Float_t   r4   =  r3 + height4;
 518
 519   partubs[0]     =  r3;
 520   partubs[1]     =  r4;
 521
 522   TTUBS *v0R4 = new TTUBS("V0R4", "V0R4", "void", partubs[0], partubs[1], partubs[2],
 523                                                   partubs[3], partubs[4]);
 524
 525   v0R4->SetNumberOfDivisions(ndiv);
 526
 527   partubs[0]     =  r4;
 528   partubs[1]     =  r5;
 529   partubs[3]     =  90.0-15.0;
 530   partubs[4]     = 120.0-30.0;
 531
 532   TTUBS *v0R5 = new TTUBS("V0R5", "V0R5", "void", partubs[0], partubs[1], partubs[2],
 533                                                   partubs[3], partubs[4]);
 534
 535   v0R5->SetNumberOfDivisions(ndiv);
 536
 537   partubs[3]     = 120.0-30.0;
 538   partubs[4]     = 120.0-15.0;
 539
 540   TTUBS *v0R6 = new TTUBS("V0R6", "V0R6", "void", partubs[0], partubs[1], partubs[2],
 541                                                   partubs[3], partubs[4]);
 542
 543   v0R6->SetNumberOfDivisions(ndiv);
 544
 545   Float_t  phi;
 546   Float_t  phiDeg= 180./6.;
 547
 548   Int_t    ndetR = 1;
 549
 550   char     nameNode[12];
 551
 552   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 553
 554   {
 555
 556     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 557
 558     sprintf(nameNode,"SUBDER%d",ndetR);
 559
 560     v0Rnode->cd();
 561     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 562     v0Rnode0->SetLineColor(kYellow);
 563     fNodes->Add(v0Rnode0);
 564     ndetR++;
 565
 566     sprintf(nameNode,"SUBDER%d",ndetR);
 567     v0Rnode0->cd();
 568     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset,0);
 569     v0Rnode1->SetLineColor(kColorVZERO);
 570     fNodes->Add(v0Rnode1);
 571     ndetR++;
 572
 573     sprintf(nameNode,"SUBDER%d",ndetR);
 574     v0Rnode0->cd();
 575     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset + offsetFibers,0);
 576     v0Rnode2->SetLineColor(kColorVZERO);
 577     fNodes->Add(v0Rnode2);
 578     ndetR++;
 579
 580     sprintf(nameNode,"SUBDER%d",ndetR);
 581     v0Rnode0->cd();
 582     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset + 2.0*offsetFibers,0);
 583     v0Rnode3->SetLineColor(kColorVZERO);
 584     fNodes->Add(v0Rnode3);
 585     ndetR++;
 586
 587     sprintf(nameNode,"SUBDER%d",ndetR);
 588     v0Rnode0->cd();
 589     v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset + 2.0*offsetFibers,0);
 590     v0Rnode4->SetLineColor(kColorVZERO);
 591     fNodes->Add(v0Rnode4);
 592     ndetR++;
 593
 594     sprintf(nameNode,"SUBDER%d",ndetR);
 595     v0Rnode0->cd();
 596     v0Rnode5 = new TNode(nameNode,nameNode,v0R5,0.0,0.0, -offset + 2.0*offsetFibers,0);
 597     v0Rnode5->SetLineColor(kColorVZERO);
 598     fNodes->Add(v0Rnode5);
 599     ndetR++;
 600
 601     sprintf(nameNode,"SUBDER%d",ndetR);
 602     v0Rnode0->cd();
 603     v0Rnode6 = new TNode(nameNode,nameNode,v0R6,0.0,0.0, -offset + 2.0*offsetFibers,0);
 604     v0Rnode6->SetLineColor(kColorVZERO);
 605     fNodes->Add(v0Rnode6);
 606     ndetR++;
 607
 608     v0Rnode0->SetVisibility(2);
 609
 610   }
 611
 612 // Left side of VZERO :
 613
 614   Float_t   r0Left      =   4.3;
 615   Float_t   height1Left =   2.6;
 616   Float_t   height2Left =   4.1;
 617   Float_t   height3Left =   6.4;
 618   Float_t   height4Left =  10.2;
 619   Float_t   height5Left =  16.9;
 620   Float_t   heightLeft  = height1Left + height2Left + height3Left
 621                                         + height4Left + height5Left;
 622   Float_t   r5Left      = r0Left  + heightLeft;
 623
 624   partube[0] =  r0Left;
 625   partube[1] =  r5Left;
 626   partube[2] =  fThickness1/2.0;
 627
 628   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 629
 630   top->cd();
 631
 632   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 633
 634   v0Lnode->SetLineColor(kBlue);
 635   fNodes->Add(v0Lnode);
 636
 637   v0Lnode->SetVisibility(2);
 638
 639   partubs[0]      =  r0Left;
 640   partubs[1]      =  r5Left;
 641   partubs[2]      =  fThickness1/2.0;
 642   partubs[3]      =  90.0-15.0;
 643   partubs[4]      = 120.0-15.0;
 644
 645   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 646                                                   partubs[3], partubs[4]);
 647
 648   v0L0->SetNumberOfDivisions(ndiv);
 649   v0L0->SetLineColor(7);
 650
 651   Float_t   offsetLeft;
 652   offsetLeft    = - fThickness1/2.0;
 653
 654   Float_t   r1Left =  r0Left + height1Left;
 655
 656   partubs[0]     =  r0Left;
 657   partubs[1]     =  r1Left;
 658
 659   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 660                                                   partubs[3], partubs[4]);
 661
 662   v0L1->SetNumberOfDivisions(ndiv);
 663
 664   Float_t   r2Left =  r1Left + height2Left;
 665
 666   partubs[0]     =  r1Left;
 667   partubs[1]     =  r2Left;
 668
 669   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 670                                                   partubs[3], partubs[4]);
 671
 672   v0L2->SetNumberOfDivisions(ndiv);
 673
 674   Float_t   r3Left  =  r2Left + height3Left;
 675
 676   partubs[0]     =  r2Left;
 677   partubs[1]     =  r3Left;
 678
 679   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 680                                                   partubs[3], partubs[4]);
 681   v0L3->SetNumberOfDivisions(ndiv);
 682
 683   Float_t   r4Left  =   r3Left + height4Left;
 684
 685   partubs[0]     =  r3Left;
 686   partubs[1]     =  r4Left;
 687
 688   TTUBS *v0L4 = new TTUBS("V0L4", "V0L4", "void", partubs[0], partubs[1], partubs[2],
 689                                                   partubs[3], partubs[4]);
 690
 691   v0L4->SetNumberOfDivisions(ndiv);
 692
 693   partubs[0]     =  r4Left;
 694   partubs[1]     =  r5Left;
 695   partubs[3]     =  90.0-15.0;
 696   partubs[4]     = 120.0-30.0;
 697
 698   TTUBS *v0L5 = new TTUBS("V0L5", "V0L5", "void", partubs[0], partubs[1], partubs[2],
 699                                                   partubs[3], partubs[4]);
 700
 701
 702   v0L5->SetNumberOfDivisions(ndiv);
 703
 704   partubs[3]     = 120.0-30.0;
 705   partubs[4]     = 120.0-15.0;
 706
 707   TTUBS *v0L6 = new TTUBS("V0L6", "V0L6", "void", partubs[0], partubs[1], partubs[2],
 708                                                   partubs[3], partubs[4]);
 709
 710   v0L6->SetNumberOfDivisions(ndiv);
 711
 712   Int_t    ndetL   = 1;
 713
 714   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 715
 716   {
 717
 718     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 719
 720
 721     sprintf(nameNode,"SUBDEL%d",ndetL);
 722
 723     v0Lnode->cd();
 724     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 725     v0Lnode0->SetLineColor(kColorVZERO);
 726     fNodes->Add(v0Lnode0);
 727     ndetL++;
 728
 729     sprintf(nameNode,"SUBDEL%d",ndetL);
 730     v0Lnode0->cd();
 731     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 732     v0Lnode1->SetLineColor(kColorVZERO);
 733     fNodes->Add(v0Lnode1);
 734     ndetL++;
 735
 736     sprintf(nameNode,"SUBDEL%d",ndetL);
 737     v0Lnode0->cd();
 738     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 739     v0Lnode2->SetLineColor(kColorVZERO);
 740     fNodes->Add(v0Lnode2);
 741     ndetL++;
 742
 743
 744     sprintf(nameNode,"SUBDEL%d",ndetL);
 745     v0Lnode0->cd();
 746     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 747     v0Lnode3->SetLineColor(kColorVZERO);
 748     fNodes->Add(v0Lnode3);
 749     ndetL++;
 750
 751     sprintf(nameNode,"SUBDEL%d",ndetL);
 752     v0Lnode0->cd();
 753     v0Lnode4 = new TNode(nameNode,nameNode,v0L4,0.0,0.0, 0.0,0);
 754     v0Lnode4->SetLineColor(kColorVZERO);
 755     fNodes->Add(v0Lnode4);
 756     ndetL++;
 757
 758     sprintf(nameNode,"SUBDEL%d",ndetL);
 759     v0Lnode0->cd();
 760     v0Lnode5 = new TNode(nameNode,nameNode,v0L5,0.0,0.0, 0.0,0);
 761     v0Lnode5->SetLineColor(kColorVZERO);
 762     fNodes->Add(v0Lnode5);
 763     ndetL++;
 764
 765     sprintf(nameNode,"SUBDEL%d",ndetL);
 766     v0Lnode0->cd();
 767     v0Lnode6 = new TNode(nameNode,nameNode,v0L6,0.0,0.0, 0.0,0);
 768     v0Lnode6->SetLineColor(kColorVZERO);
 769     fNodes->Add(v0Lnode6);
 770     ndetL++;
 771
 772     v0Lnode0->SetVisibility(2);
 773
 774   }
 775
 776 }
 777
 778 //_____________________________________________________________________________
 779 void AliVZEROv2::CreateMaterials()
 780 {
 781
 782 // Creates materials used for geometry
 783
 784     Int_t i;
 785
 786     printf("\n");
 787     for(i=0;i<25;i++) printf("*");
 788     printf(" VZERO create materials ");
 789     for(i=0;i<26;i++) printf("*");
 790     printf("\n");
 791
 792 /*
 793     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,
 794                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 795
 796
 797     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,
 798                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 799
 800     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 801                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 802                                  1.662295, 1.68337 };
 803
 804     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 805                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 806
 807     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 808
 809
 810     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 811
 812
 813     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,
 814                                1e-4,1e-4,1e-4,1e-4 };
 815     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 816
 817 */
 818
 819     Int_t *idtmed = fIdtmed->GetArray()-2999;
 820
 821 //    TGeant3 *geant3 = (TGeant3*) gMC;
 822
 823 //  Parameters related to Quarz (SiO2) :
 824
 825     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 826     Int_t nlmatqua;
 827
 828     aqua[0]    = 28.09;
 829     aqua[1]    = 16.;
 830     zqua[0]    = 14.;
 831     zqua[1]    = 8.;
 832     densqua    = 2.64;
 833     nlmatqua   = -2;
 834     wmatqua[0] = 1.;
 835     wmatqua[1] = 2.;
 836
 837 // Parameters  related to aluminum sheets :
 838
 839     Float_t  aal   = 26.98;
 840     Float_t  zal   = 13.00;
 841     Float_t  densal=   2.7;
 842     Float_t  radlal=   8.9;
 843
 844 // Parameters  related to scintillator CH :
 845
 846     Float_t ascin[2] = {1.00794,12.011};
 847     Float_t zscin[2] = {1.,6.};
 848     Float_t wscin[2] = {1.,1.};
 849     Float_t denscin  = 1.032;
 850
 851 //  Definition of materials :
 852
 853     AliMaterial( 1, "AIR A$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
 854     AliMaterial(11, "AIR I$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
 855     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 856     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 857     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 858     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 859
 860     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 861
 862
 863     Int_t   iSXFLD = gAlice->Field()->Integ();
 864     Float_t sXMGMX = gAlice->Field()->Max();
 865
 866     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 867
 868     tmaxfd = 10.;
 869     stemax = 0.1;
 870     deemax = 0.1;
 871     epsil  = 0.001;
 872     stmin  = 0.001;
 873
 874 //  Active Air :
 875     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 876               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 877
 878 //  Inactive air :
 879
 880     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 881               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 882
 883     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 884               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 885
 886     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 887               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 888
 889     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 890               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 891
 892
 893     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 894               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 895
 896     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 897
 898     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 899     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 900     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 901     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 902
 903     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 904     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 905     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 906     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 907
 908     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 909     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 910     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 911     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 912     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 913     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 914
 915     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 916     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 917     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 918     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 919
 920     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 921     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 922     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 923     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 924     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 925     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 926
 927     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 928     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 929     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 930     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 931     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 932     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 933
 934
 935 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 936 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 937
 938 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 939 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 940
 941 }
 942
 943 //_____________________________________________________________________________
 944 void AliVZEROv2::DrawModule()
 945 {
 946
 947 //  Drawing is done in DrawVZERO.C
 948
 949    Int_t i;
 950
 951    printf("\n");
 952    for(i=0;i<30;i++) printf("*");
 953    printf(" VZERO DrawModule ");
 954    for(i=0;i<30;i++) printf("*");
 955    printf("\n");
 956
 957
 958 }
 959
 960 //_____________________________________________________________________________
 961 void AliVZEROv2::Init()
 962 {
 963 // Initialises version 2 of the VZERO Detector
 964 // Just prints an information message
 965
 966    printf(" VZERO version %d initialized \n",IsVersion());
 967
 968 //   gMC->SetMaxStep(fMaxStepAlu);
 969 //   gMC->SetMaxStep(fMaxStepQua);
 970
 971     AliVZERO::Init();
 972
 973 }
 974
 975
 976 //_____________________________________________________________________________
 977 void AliVZEROv2::StepManager()
 978 {
 979
 980 // Step Manager, called at each step
 981
 982      Int_t     copy;
 983      static    Int_t   vol[4];
 984      static    Float_t hits[19];
 985      static    Float_t eloss, tlength;
 986
 987      TLorentzVector pos;
 988      TLorentzVector mom;
 989
 990      Float_t        theta;
 991      Float_t        phi;
 992      Float_t        kRaddeg = 180.0/TMath::Pi();
 993      Float_t        ringNumber;
 994
 995      Int_t          ipart;
 996      Float_t        destep, step;
 997
 998
 999 //   We keep only charged tracks :
1000
1001      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
1002
1003
1004      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
1005      vol[2]    = gMC->CurrentVolID(copy);
1006      vol[3]    = copy;
1007
1008
1009      if      ( gMC->CurrentVolID(copy) == gMC->VolId("V0R1") ||
1010                gMC->CurrentVolID(copy) == gMC->VolId("V0L1") )
1011                ringNumber = 1.0;
1012      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R2") ||
1013                gMC->CurrentVolID(copy) == gMC->VolId("V0L2") )
1014                ringNumber = 2.0;
1015      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R3") ||
1016                gMC->CurrentVolID(copy) == gMC->VolId("V0L3") )
1017                ringNumber = 3.0;
1018      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R4") ||
1019                gMC->CurrentVolID(copy) == gMC->VolId("V0L4") )
1020                ringNumber = 4.0;
1021      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R5") ||
1022                gMC->CurrentVolID(copy) == gMC->VolId("V0L5") ||
1023                gMC->CurrentVolID(copy) == gMC->VolId("V0L6") ||
1024                gMC->CurrentVolID(copy) == gMC->VolId("V0R6") )
1025                ringNumber = 5.0;
1026      else
1027                ringNumber = 0.0;
1028
1029      if  (  ringNumber > 0.5  ) {
1030
1031         destep    = gMC->Edep();
1032         step      = gMC->TrackStep();
1033         eloss    += destep;
1034         tlength  += step;
1035
1036
1037         if  ( gMC->IsTrackEntering()  )  {
1038
1039             gMC->TrackPosition(pos);
1040
1041             gMC->TrackMomentum(mom);
1042             Double_t tc   = mom[0]*mom[0]+mom[1]*mom[1];
1043             Double_t pt   = TMath::Sqrt(tc);
1044             Double_t pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
1045             theta   = Float_t(TMath::ATan2(pt,Double_t(mom[2])))*kRaddeg;
1046             phi     = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1047
1048             ipart  = gMC->TrackPid();
1049
1050             hits[0]  = pos[0];
1051             hits[1]  = pos[1];
1052             hits[2]  = pos[2];
1053             hits[3]  =  Float_t (ipart);
1054
1055             hits[4]  = gMC->TrackTime();
1056             hits[5]  = gMC->TrackCharge();
1057             hits[6]  = theta;
1058             hits[7]  = phi;
1059             hits[8]  = ringNumber;
1060
1061             hits[9]  = pt;
1062             hits[10] = pmom;
1063             hits[11] = mom[0];
1064             hits[12] = mom[1];
1065             hits[13] = mom[2];
1066
1067             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
1068             hits[14] = par->Vx();
1069             hits[15] = par->Vy();
1070             hits[16] = par->Vz();
1071
1072             tlength  = 0.0;
1073             eloss    = 0.0;
1074
1075          }
1076
1077          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1078
1079          hits[17] =   eloss;
1080          hits[18] = tlength;
1081
1082          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
1083
1084          tlength  = 0.0;
1085          eloss    = 0.0;
1086
1087          }
1088     }
1089
1090 }
1091
1092 //_____________________________________________________________________________
1093 void AliVZEROv2::AddHit(Int_t track, Int_t *vol, Float_t *hits)
1094 {
1095
1096 //  Adds a VZERO hit
1097
1098   TClonesArray &lhits = *fHits;
1099   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
1100 }
1101
1102 //_____________________________________________________________________________
1103 void AliVZEROv2::AddDigits(Int_t *tracks, Int_t* digits)
1104 {
1105
1106 //  Adds a VZERO digit
1107
1108    TClonesArray  &ldigits = *fDigits;
1109    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1110 }
1111
1112 //_____________________________________________________________________________
1113 void AliVZEROv2::MakeBranch(Option_t *option)
1114 {
1115
1116 // Creates new branches in the current Root Tree
1117
1118   char branchname[10];
1119   sprintf(branchname,"%s",GetName());
1120   printf(" fBufferSize = %d \n",fBufferSize);
1121
1122   const char *cH = strstr(option,"H");
1123
1124   if (fHits   && TreeH() && cH) {
1125     TreeH()->Branch(branchname,&fHits, fBufferSize);
1126     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1127   }
1128
1129   const char *cD = strstr(option,"D");
1130
1131   if (fDigits   && fLoader->TreeD() && cD) {
1132     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1133     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1134   }
1135
1136 }