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 <TGeometry.h>
  41 #include <TLorentzVector.h>
  42 #include <TMath.h>
  43 #include <TNode.h>
  44 #include <TObjectTable.h>
  45 #include <TTUBE.h>
  46 #include <TTUBS.h>
  47 #include <TVirtualMC.h>
  48 #include <TParticle.h>
  49
  50 // --- AliRoot header files ---
  51 #include "AliRun.h"
  52 #include "AliMC.h"
  53 #include "AliConst.h"
  54 #include "AliMagF.h"
  55 #include "AliVZEROLoader.h"
  56 #include "AliVZEROdigit.h"
  57 #include "AliVZEROhit.h"
  58 #include "AliVZEROv2.h"
  59
  60 ClassImp(AliVZEROv2)
  61
  62 //_____________________________________________________________________________
  63 AliVZEROv2:: AliVZEROv2():AliVZERO()
  64 {
  65 // Standard default constructor
  66 }
  67
  68 //_____________________________________________________________________________
  69 AliVZEROv2::AliVZEROv2(const char *name, const char *title):
  70  AliVZERO(name,title)
  71 {
  72
  73 // Standard constructor for V-zero Detector  version 2
  74
  75   Int_t i;
  76
  77   printf("\n");
  78   for(i=0;i<26;i++) printf("*");
  79   printf(" Create VZERO object ");
  80   for(i=0;i<26;i++) printf("*");
  81   printf("\n");
  82
  83 }
  84
  85 //_____________________________________________________________________________
  86 void AliVZEROv2::CreateGeometry()
  87 {
  88
  89 // Creates the GEANT geometry of the V-zero Detector  version 2
  90
  91   Int_t i;
  92
  93   printf("\n");
  94   for(i=0;i<26;i++) printf("*");
  95   printf(" Create VZERO Geometry ");
  96   for(i=0;i<26;i++) printf("*");
  97   printf("\n");
  98
  99   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 100
 101   Int_t    ndetR = 1;
 102   Int_t    ndetL = 1;
 103
 104   Int_t    ncellsR = 1;
 105   Int_t    ncellsL = 1;
 106
 107   Int_t    idrotm[999];
 108
 109   Float_t  height1, height2, height3, height4, height5;
 110   Float_t  height;
 111   Float_t  theta;
 112
 113   Float_t  halfThickQua;
 114
 115   Float_t  zdet;
 116   Float_t  r0, r5;
 117   Float_t  pi = TMath::Pi();
 118
 119   height1     =     1.82;         // height of cell 1, in cm
 120   height2     =     3.81;         // height of cell 2, in cm
 121   height3     =     4.72;         // height of cell 3, in cm
 122   height4     =     7.12;         // height of cell 4, in cm
 123   height5     =    10.83;         // height of cell 5, in cm
 124
 125   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 126
 127   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 128
 129 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 130 // absorber nose sitting at 90 cm. Will use -zdet later...
 131
 132   zdet        =    90.0 - 0.6 -fThickness/2.0;  // distance to vertex (along Z axis)
 133   r0          =    4.05;          // closest distance to center of the beam pipe
 134   height      =    height1 + height2 + height3 + height4 + height5;
 135   r5          =    r0 + height;
 136
 137 // Creation of mother volume v0LE - left part - :
 138 // Entrance face at  +350.0 cm  (new coordinate system) ...
 139
 140    Float_t   partube[3];
 141
 142    partube[0] =  4.3;
 143    partube[1] = 45.0;
 144    partube[2] = fThickness1/2.0;
 145
 146    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 147
 148 // Creation of five rings - left part - :
 149 // Entrance face at +350.0 cm  (new coordinate system) ...
 150
 151 // Mother volume v0L0 in which will be set 5 scintillator cells
 152
 153   Float_t   partubs[5];
 154
 155   Float_t   r0Left      =   4.3;
 156   Float_t   height1Left =   2.6;
 157   Float_t   height2Left =   4.1;
 158   Float_t   height3Left =   6.4;
 159   Float_t   height4Left =  10.2;
 160   Float_t   height5Left =  16.9;
 161   Float_t   heightLeft  = height1Left + height2Left + height3Left
 162                                       + height4Left + height5Left;
 163   Float_t   r5Left      = r0Left  + heightLeft;
 164
 165   partubs[0]      =  r0Left;
 166   partubs[1]      =  r5Left;
 167   partubs[2]      =  fThickness1/2.0;
 168   partubs[3]      =  90.0-15.0;
 169   partubs[4]      = 120.0-15.0;
 170
 171   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 172
 173   Float_t  r1Left =  r0Left + height1Left;
 174
 175   partubs[0]     =  r0Left;
 176   partubs[1]     =  r1Left;
 177
 178   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 179   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 180
 181   Float_t   r2Left  =   r1Left + height2Left;
 182
 183   partubs[0]     =  r1Left;
 184   partubs[1]     =  r2Left;
 185
 186   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 187   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 188
 189   Float_t   r3Left =   r2Left + height3Left;
 190
 191   partubs[0]     =  r2Left;
 192   partubs[1]     =  r3Left;
 193
 194   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 195   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 196
 197   Float_t   r4Left =  r3Left + height4Left;
 198
 199   partubs[0]     =  r3Left;
 200   partubs[1]     =  r4Left;
 201
 202   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 203   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 204
 205   partubs[0]     =  r4Left;
 206   partubs[1]     =  r5Left;
 207   partubs[3]     =  90.0-15.0;
 208   partubs[4]     = 120.0-30.0;
 209
 210   gMC->Gsvolu("V0L5","TUBS",idtmed[3005],partubs,5);  // quartz volume
 211   gMC->Gspos("V0L5",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 212
 213   partubs[3]     = 120.0-30.0;
 214   partubs[4]     = 120.0-15.0;
 215
 216   gMC->Gsvolu("V0L6","TUBS",idtmed[3005],partubs,5);  // quartz volume
 217   gMC->Gspos("V0L6",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 218
 219
 220 // Creation of mother volume v0RI - right part - :
 221
 222   partube[0] = r0 - 0.2;
 223   partube[1] = r5 + 1.0;
 224   partube[2] = fThickness/2.0;
 225
 226   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 227
 228 // Creation of  carbon lids (2 mm thick) to keep v0RI box shut...
 229
 230   Float_t  lidThickness = 0.2;
 231
 232   partube[0] =   r0;
 233   partube[1] =   r5;
 234   partube[2] =   +lidThickness/2.0;
 235
 236   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 237   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 238   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 239
 240 // Creation of aluminum rings to maintain the v0RI pieces ...
 241
 242   partube[0] =   r0 - 0.2;
 243   partube[1] =   r0;
 244   partube[2] =   +fThickness/2.0;
 245
 246   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 247   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 248
 249   partube[0] =   r5;
 250   partube[1] =   r5 + 1.0;
 251   partube[2] =   +fThickness/2.0;
 252
 253   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 254   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 255
 256 // Mother volume v0R0 in which will be set 5  scintillator cells
 257
 258   partubs[0]      =  r0;
 259   partubs[1]      =  r5;
 260   partubs[2]      =  fThickness/2.0;
 261   partubs[3]      =  90.0-15.0;
 262   partubs[4]      = 120.0-15.0;
 263
 264   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 265
 266 // Elementary cell of ring 1 :
 267 // (cells 2 and 3  will be shifted by 1 cm to output fibers)
 268
 269   Float_t   offsetFibers  =  1.0;
 270   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 271   Float_t   r1            =  r0 + height1;
 272
 273   partubs[0]     =  r0;
 274   partubs[1]     =  r1;
 275   partubs[2]     =  fThickness1/2.0;
 276
 277   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 278   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 279
 280 // Elementary cell of ring 2 :
 281
 282   Float_t   r2   =  r1 + height2;
 283
 284   partubs[0]     =  r1;
 285   partubs[1]     =  r2;
 286
 287   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 288   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 289
 290
 291 // Elementary cell of ring 3 :
 292
 293   Float_t   r3   =  r2 + height3;
 294
 295   partubs[0]     =  r2;
 296   partubs[1]     =  r3;
 297
 298   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 299   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 300
 301 // Elementary cell of ring 4 :
 302
 303   Float_t   r4   =  r3 + height4 ;
 304
 305   partubs[0]     =  r3;
 306   partubs[1]     =  r4;
 307
 308   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 309   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 ,  -offset + 2.0 * offsetFibers, 0,"ONLY");
 310
 311 // Elementary cells of ring 5 :
 312
 313   partubs[0]     =  r4;
 314   partubs[1]     =  r5;
 315   partubs[3]     =  90.0-15.0;
 316   partubs[4]     = 120.0-30.0;
 317
 318   gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 319   gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 320
 321   partubs[3]     = 120.0-30.0;
 322   partubs[4]     = 120.0-15.0;
 323
 324   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 325   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 ,  -offset + 2.0 * offsetFibers, 0,"ONLY");
 326
 327   Float_t  phiDeg = 180./6.;
 328
 329 // Right part :
 330
 331   for(Float_t  phi = 15.0; 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("V0R0",ndetR,"V0RI",0.0,
 335                           0.0,0.0,idrotm[902],"ONLY");
 336         ndetR++;
 337        }
 338
 339   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 340
 341   ncellsR = (ndetR - 1) * 6;
 342   printf("    Number of cells on Right side =   %d\n",  ncellsR);
 343
 344 // Left part :
 345
 346   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 347       {
 348         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 349         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 350                           0.0,0.0,idrotm[902],"ONLY");
 351         ndetL++;
 352        }
 353
 354   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 355
 356   ncellsL = (ndetL - 1) * 6;
 357   printf("    Number of cells on Left side  =   %d\n",  ncellsL);
 358   for(i=0;i<75;i++) printf("*");
 359   printf("\n");
 360
 361 }
 362
 363 //_____________________________________________________________________________
 364 void AliVZEROv2::BuildGeometry()
 365 {
 366
 367 // Builds simple ROOT TNode geometry for event display
 368
 369   Int_t i;
 370
 371   printf("\n");
 372   for(i=0;i<30;i++) printf("*");
 373   printf(" VZERO BuildGeometry ");
 374   for(i=0;i<30;i++) printf("*");
 375   printf("\n");
 376
 377   TNode *top;
 378
 379   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 380   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3, *v0Rnode4, *v0Rnode5;
 381   TNode *v0Lnode, *v0Lnode0;
 382   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3, *v0Lnode4, *v0Lnode5, *v0Lnode6;
 383
 384   const int kColorVZERO  = kGreen;
 385
 386   top = gAlice->GetGeometry()->GetNode("alice");
 387
 388   Float_t  height1, height2, height3, height4, height5;
 389   Float_t  height;
 390   Float_t  theta;
 391
 392   Float_t  halfThickQua;
 393   Float_t  zdet;
 394   Float_t  r0, r5;
 395   Float_t  pi = TMath::Pi();
 396
 397   height1           =     1.82;           // height of cell 1, in cm
 398   height2           =     3.81;           // height of cell 2, in cm
 399   height3           =     4.72;           // height of cell 3, in cm
 400   height4           =     7.12;           // height of cell 4, in cm
 401   height5           =    10.83;           // height of cell 5, in cm
 402
 403   theta             =    pi/6.0/2.0;
 404
 405   halfThickQua    =    fThickness1/2.0;
 406
 407   zdet              =    90.0 - 0.6 - fThickness/2.0;
 408   r0                =    4.05;
 409   height            =    height1 + height2 + height3 + height4 + height5;
 410   r5                =    r0 + height;
 411
 412   Int_t     ndiv    =     1;
 413
 414   Float_t   partube[3];
 415
 416   partube[0] =  r0 - 0.2;
 417   partube[1] =  r5 + 1.0;
 418   partube[2] = fThickness/2.0;
 419
 420   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 421
 422   top->cd();
 423
 424   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 425
 426   v0Rnode->SetLineColor(kYellow);
 427   fNodes->Add(v0Rnode);
 428   v0Rnode->SetVisibility(2);
 429
 430 // Rondelles de carbone (epaisseur 2 mm) de maintien des cellules ...
 431
 432   Float_t  lidThickness = 0.2;
 433
 434   partube[0] =   r0;
 435   partube[1] =   r5;
 436   partube[2] =   +lidThickness/2.0;
 437
 438   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 439
 440   v0Rnode->cd();
 441   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 442   v0Rnode6->SetLineColor(kYellow);
 443   fNodes->Add(v0Rnode6);
 444   v0Rnode->cd();
 445   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 446   v0Rnode7->SetLineColor(kYellow);
 447   fNodes->Add(v0Rnode7);
 448
 449   partube[0] =   r0 - 0.2;
 450   partube[1] =   r0;
 451   partube[2] =   +fThickness/2.0;
 452
 453   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 454
 455   v0Rnode->cd();
 456   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 457   v0Rnode8->SetLineColor(kYellow);
 458   fNodes->Add(v0Rnode8);
 459
 460   partube[0] =   r5;
 461   partube[1] =   r5 + 1.0;
 462   partube[2] =   +fThickness/2.0;
 463
 464   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 465
 466   v0Rnode->cd();
 467   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 468   v0Rnode9->SetLineColor(kYellow);
 469   fNodes->Add(v0Rnode9);
 470
 471   Float_t   partubs[5];
 472
 473   partubs[0]      =  r0;
 474   partubs[1]      =  r5;
 475   partubs[2]      =  fThickness/2.0;
 476   partubs[3]      =  90.0-15.0;
 477   partubs[4]      = 120.0-15.0;
 478
 479   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 480                                                   partubs[3], partubs[4]);
 481
 482   v0R0->SetNumberOfDivisions(ndiv);
 483
 484   Float_t   r1     =  r0 + height1;
 485   Float_t   offset = fThickness/2.0 - lidThickness - fThickness1/2.0;
 486   Float_t   offsetFibers = 1.0;
 487
 488   partubs[0]     =  r0;
 489   partubs[1]     =  r1;
 490   partubs[2]     =  fThickness1/2.0;
 491
 492   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 493                                                   partubs[3], partubs[4]);
 494
 495   v0R1->SetNumberOfDivisions(ndiv);
 496
 497   Float_t   r2   =  r1 + height2;
 498
 499   partubs[0]     =  r1;
 500   partubs[1]     =  r2;
 501
 502   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 503                                                   partubs[3], partubs[4]);
 504
 505   v0R2->SetNumberOfDivisions(ndiv);
 506
 507   Float_t   r3   =  r2 + height3;
 508
 509   partubs[0]     =  r2;
 510   partubs[1]     =  r3;
 511
 512   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 513                                                   partubs[3], partubs[4]);
 514   v0R3->SetNumberOfDivisions(ndiv);
 515
 516   Float_t   r4   =  r3 + height4;
 517
 518   partubs[0]     =  r3;
 519   partubs[1]     =  r4;
 520
 521   TTUBS *v0R4 = new TTUBS("V0R4", "V0R4", "void", partubs[0], partubs[1], partubs[2],
 522                                                   partubs[3], partubs[4]);
 523
 524   v0R4->SetNumberOfDivisions(ndiv);
 525
 526   partubs[0]     =  r4;
 527   partubs[1]     =  r5;
 528   partubs[3]     =  90.0-15.0;
 529   partubs[4]     = 120.0-30.0;
 530
 531   TTUBS *v0R5 = new TTUBS("V0R5", "V0R5", "void", partubs[0], partubs[1], partubs[2],
 532                                                   partubs[3], partubs[4]);
 533
 534   v0R5->SetNumberOfDivisions(ndiv);
 535
 536   partubs[3]     = 120.0-30.0;
 537   partubs[4]     = 120.0-15.0;
 538
 539   TTUBS *v0R6 = new TTUBS("V0R6", "V0R6", "void", partubs[0], partubs[1], partubs[2],
 540                                                   partubs[3], partubs[4]);
 541
 542   v0R6->SetNumberOfDivisions(ndiv);
 543
 544   Float_t  phi;
 545   Float_t  phiDeg= 180./6.;
 546
 547   Int_t    ndetR = 1;
 548
 549   char     nameNode[12];
 550
 551   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 552
 553   {
 554
 555     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 556
 557     sprintf(nameNode,"SUBDER%d",ndetR);
 558
 559     v0Rnode->cd();
 560     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 561     v0Rnode0->SetLineColor(kYellow);
 562     fNodes->Add(v0Rnode0);
 563     ndetR++;
 564
 565     sprintf(nameNode,"SUBDER%d",ndetR);
 566     v0Rnode0->cd();
 567     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset,0);
 568     v0Rnode1->SetLineColor(kColorVZERO);
 569     fNodes->Add(v0Rnode1);
 570     ndetR++;
 571
 572     sprintf(nameNode,"SUBDER%d",ndetR);
 573     v0Rnode0->cd();
 574     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset + offsetFibers,0);
 575     v0Rnode2->SetLineColor(kColorVZERO);
 576     fNodes->Add(v0Rnode2);
 577     ndetR++;
 578
 579     sprintf(nameNode,"SUBDER%d",ndetR);
 580     v0Rnode0->cd();
 581     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset + 2.0*offsetFibers,0);
 582     v0Rnode3->SetLineColor(kColorVZERO);
 583     fNodes->Add(v0Rnode3);
 584     ndetR++;
 585
 586     sprintf(nameNode,"SUBDER%d",ndetR);
 587     v0Rnode0->cd();
 588     v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset + 2.0*offsetFibers,0);
 589     v0Rnode4->SetLineColor(kColorVZERO);
 590     fNodes->Add(v0Rnode4);
 591     ndetR++;
 592
 593     sprintf(nameNode,"SUBDER%d",ndetR);
 594     v0Rnode0->cd();
 595     v0Rnode5 = new TNode(nameNode,nameNode,v0R5,0.0,0.0, -offset + 2.0*offsetFibers,0);
 596     v0Rnode5->SetLineColor(kColorVZERO);
 597     fNodes->Add(v0Rnode5);
 598     ndetR++;
 599
 600     sprintf(nameNode,"SUBDER%d",ndetR);
 601     v0Rnode0->cd();
 602     v0Rnode6 = new TNode(nameNode,nameNode,v0R6,0.0,0.0, -offset + 2.0*offsetFibers,0);
 603     v0Rnode6->SetLineColor(kColorVZERO);
 604     fNodes->Add(v0Rnode6);
 605     ndetR++;
 606
 607     v0Rnode0->SetVisibility(2);
 608
 609   }
 610
 611 // Left side of VZERO :
 612
 613   Float_t   r0Left      =   4.3;
 614   Float_t   height1Left =   2.6;
 615   Float_t   height2Left =   4.1;
 616   Float_t   height3Left =   6.4;
 617   Float_t   height4Left =  10.2;
 618   Float_t   height5Left =  16.9;
 619   Float_t   heightLeft  = height1Left + height2Left + height3Left
 620                                         + height4Left + height5Left;
 621   Float_t   r5Left      = r0Left  + heightLeft;
 622
 623   partube[0] =  r0Left;
 624   partube[1] =  r5Left;
 625   partube[2] =  fThickness1/2.0;
 626
 627   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 628
 629   top->cd();
 630
 631   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 632
 633   v0Lnode->SetLineColor(kBlue);
 634   fNodes->Add(v0Lnode);
 635
 636   v0Lnode->SetVisibility(2);
 637
 638   partubs[0]      =  r0Left;
 639   partubs[1]      =  r5Left;
 640   partubs[2]      =  fThickness1/2.0;
 641   partubs[3]      =  90.0-15.0;
 642   partubs[4]      = 120.0-15.0;
 643
 644   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 645                                                   partubs[3], partubs[4]);
 646
 647   v0L0->SetNumberOfDivisions(ndiv);
 648   v0L0->SetLineColor(7);
 649
 650   Float_t   offsetLeft;
 651   offsetLeft    = - fThickness1/2.0;
 652
 653   Float_t   r1Left =  r0Left + height1Left;
 654
 655   partubs[0]     =  r0Left;
 656   partubs[1]     =  r1Left;
 657
 658   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 659                                                   partubs[3], partubs[4]);
 660
 661   v0L1->SetNumberOfDivisions(ndiv);
 662
 663   Float_t   r2Left =  r1Left + height2Left;
 664
 665   partubs[0]     =  r1Left;
 666   partubs[1]     =  r2Left;
 667
 668   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 669                                                   partubs[3], partubs[4]);
 670
 671   v0L2->SetNumberOfDivisions(ndiv);
 672
 673   Float_t   r3Left  =  r2Left + height3Left;
 674
 675   partubs[0]     =  r2Left;
 676   partubs[1]     =  r3Left;
 677
 678   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 679                                                   partubs[3], partubs[4]);
 680   v0L3->SetNumberOfDivisions(ndiv);
 681
 682   Float_t   r4Left  =   r3Left + height4Left;
 683
 684   partubs[0]     =  r3Left;
 685   partubs[1]     =  r4Left;
 686
 687   TTUBS *v0L4 = new TTUBS("V0L4", "V0L4", "void", partubs[0], partubs[1], partubs[2],
 688                                                   partubs[3], partubs[4]);
 689
 690   v0L4->SetNumberOfDivisions(ndiv);
 691
 692   partubs[0]     =  r4Left;
 693   partubs[1]     =  r5Left;
 694   partubs[3]     =  90.0-15.0;
 695   partubs[4]     = 120.0-30.0;
 696
 697   TTUBS *v0L5 = new TTUBS("V0L5", "V0L5", "void", partubs[0], partubs[1], partubs[2],
 698                                                   partubs[3], partubs[4]);
 699
 700
 701   v0L5->SetNumberOfDivisions(ndiv);
 702
 703   partubs[3]     = 120.0-30.0;
 704   partubs[4]     = 120.0-15.0;
 705
 706   TTUBS *v0L6 = new TTUBS("V0L6", "V0L6", "void", partubs[0], partubs[1], partubs[2],
 707                                                   partubs[3], partubs[4]);
 708
 709   v0L6->SetNumberOfDivisions(ndiv);
 710
 711   Int_t    ndetL   = 1;
 712
 713   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 714
 715   {
 716
 717     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 718
 719
 720     sprintf(nameNode,"SUBDEL%d",ndetL);
 721
 722     v0Lnode->cd();
 723     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 724     v0Lnode0->SetLineColor(kColorVZERO);
 725     fNodes->Add(v0Lnode0);
 726     ndetL++;
 727
 728     sprintf(nameNode,"SUBDEL%d",ndetL);
 729     v0Lnode0->cd();
 730     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 731     v0Lnode1->SetLineColor(kColorVZERO);
 732     fNodes->Add(v0Lnode1);
 733     ndetL++;
 734
 735     sprintf(nameNode,"SUBDEL%d",ndetL);
 736     v0Lnode0->cd();
 737     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 738     v0Lnode2->SetLineColor(kColorVZERO);
 739     fNodes->Add(v0Lnode2);
 740     ndetL++;
 741
 742
 743     sprintf(nameNode,"SUBDEL%d",ndetL);
 744     v0Lnode0->cd();
 745     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 746     v0Lnode3->SetLineColor(kColorVZERO);
 747     fNodes->Add(v0Lnode3);
 748     ndetL++;
 749
 750     sprintf(nameNode,"SUBDEL%d",ndetL);
 751     v0Lnode0->cd();
 752     v0Lnode4 = new TNode(nameNode,nameNode,v0L4,0.0,0.0, 0.0,0);
 753     v0Lnode4->SetLineColor(kColorVZERO);
 754     fNodes->Add(v0Lnode4);
 755     ndetL++;
 756
 757     sprintf(nameNode,"SUBDEL%d",ndetL);
 758     v0Lnode0->cd();
 759     v0Lnode5 = new TNode(nameNode,nameNode,v0L5,0.0,0.0, 0.0,0);
 760     v0Lnode5->SetLineColor(kColorVZERO);
 761     fNodes->Add(v0Lnode5);
 762     ndetL++;
 763
 764     sprintf(nameNode,"SUBDEL%d",ndetL);
 765     v0Lnode0->cd();
 766     v0Lnode6 = new TNode(nameNode,nameNode,v0L6,0.0,0.0, 0.0,0);
 767     v0Lnode6->SetLineColor(kColorVZERO);
 768     fNodes->Add(v0Lnode6);
 769     ndetL++;
 770
 771     v0Lnode0->SetVisibility(2);
 772
 773   }
 774
 775 }
 776
 777 //_____________________________________________________________________________
 778 void AliVZEROv2::CreateMaterials()
 779 {
 780
 781 // Creates materials used for geometry
 782
 783     Int_t i;
 784
 785     printf("\n");
 786     for(i=0;i<25;i++) printf("*");
 787     printf(" VZERO create materials ");
 788     for(i=0;i<26;i++) printf("*");
 789     printf("\n");
 790
 791 /*
 792     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,
 793                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 794
 795
 796     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,
 797                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 798
 799     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 800                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 801                                  1.662295, 1.68337 };
 802
 803     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 804                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 805
 806     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 807
 808
 809     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 810
 811
 812     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,
 813                                1e-4,1e-4,1e-4,1e-4 };
 814     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 815
 816 */
 817
 818     Int_t *idtmed = fIdtmed->GetArray()-2999;
 819
 820
 821 //  Parameters related to Quarz (SiO2) :
 822
 823     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 824     Int_t nlmatqua;
 825
 826     aqua[0]    = 28.09;
 827     aqua[1]    = 16.;
 828     zqua[0]    = 14.;
 829     zqua[1]    = 8.;
 830     densqua    = 2.64;
 831     nlmatqua   = -2;
 832     wmatqua[0] = 1.;
 833     wmatqua[1] = 2.;
 834
 835 // Parameters  related to aluminum sheets :
 836
 837     Float_t  aal   = 26.98;
 838     Float_t  zal   = 13.00;
 839     Float_t  densal=   2.7;
 840     Float_t  radlal=   8.9;
 841
 842 // Parameters  related to scintillator CH :
 843
 844     Float_t ascin[2] = {1.00794,12.011};
 845     Float_t zscin[2] = {1.,6.};
 846     Float_t wscin[2] = {1.,1.};
 847     Float_t denscin  = 1.032;
 848
 849 // AIR
 850
 851     Float_t aAir[4]={12.,14.,16.,36.};
 852     Float_t zAir[4]={6.,7.,8.,18.};
 853     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 854     Float_t dAir = 1.20479E-3;
 855
 856 //  Definition of materials :
 857
 858     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 859     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 860     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 861     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 862     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 863     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 864
 865     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 866
 867
 868     Int_t   iSXFLD = gAlice->Field()->Integ();
 869     Float_t sXMGMX = gAlice->Field()->Max();
 870
 871     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 872
 873     tmaxfd = 10.;
 874     stemax = 0.1;
 875     deemax = 0.1;
 876     epsil  = 0.001;
 877     stmin  = 0.001;
 878
 879 //  Active Air :
 880     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 881               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 882
 883 //  Inactive air :
 884
 885     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 886               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 887
 888     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 889               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 890
 891     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 892               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 893
 894     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 895               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 896
 897
 898     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 899               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 900
 901     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 902
 903     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 904     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 905     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 906     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 907
 908     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 909     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 910     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 911     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 912
 913     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 914     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 915     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 916     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 917     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 918     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 919
 920     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 921     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 922     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 923     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 924
 925     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 926     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 927     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 928     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 929     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 930     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 931
 932     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 933     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 934     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 935     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 936     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 937     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 938
 939
 940 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 941 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 942
 943 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 944 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 945
 946 }
 947
 948 //_____________________________________________________________________________
 949 void AliVZEROv2::DrawModule()
 950 {
 951
 952 //  Drawing is done in DrawVZERO.C
 953
 954    Int_t i;
 955
 956    printf("\n");
 957    for(i=0;i<30;i++) printf("*");
 958    printf(" VZERO DrawModule ");
 959    for(i=0;i<30;i++) printf("*");
 960    printf("\n");
 961
 962
 963 }
 964
 965 //_____________________________________________________________________________
 966 void AliVZEROv2::Init()
 967 {
 968 // Initialises version 2 of the VZERO Detector
 969 // Just prints an information message
 970
 971    printf(" VZERO version %d initialized \n",IsVersion());
 972
 973 //   gMC->SetMaxStep(fMaxStepAlu);
 974 //   gMC->SetMaxStep(fMaxStepQua);
 975
 976     AliVZERO::Init();
 977
 978 }
 979
 980
 981 //_____________________________________________________________________________
 982 void AliVZEROv2::StepManager()
 983 {
 984
 985 // Step Manager, called at each step
 986
 987      Int_t     copy;
 988      static    Int_t   vol[4];
 989      static    Float_t hits[19];
 990      static    Float_t eloss, tlength;
 991
 992      TLorentzVector pos;
 993      TLorentzVector mom;
 994
 995      Float_t        theta;
 996      Float_t        phi;
 997      Float_t        kRaddeg = 180.0/TMath::Pi();
 998      Float_t        ringNumber;
 999
1000      Int_t          ipart;
1001      Float_t        destep, step;
1002
1003
1004 //   We keep only charged tracks :
1005
1006      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
1007
1008
1009      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
1010      vol[2]    = gMC->CurrentVolID(copy);
1011      vol[3]    = copy;
1012
1013      static Int_t idV0R1 = gMC->VolId("V0R1");
1014      static Int_t idV0L1 = gMC->VolId("V0L1");
1015      static Int_t idV0R2 = gMC->VolId("V0R2");
1016      static Int_t idV0L2 = gMC->VolId("V0L2");
1017      static Int_t idV0R3 = gMC->VolId("V0R3");
1018      static Int_t idV0L3 = gMC->VolId("V0L3");
1019      static Int_t idV0R4 = gMC->VolId("V0R4");
1020      static Int_t idV0L4 = gMC->VolId("V0L4");
1021      static Int_t idV0R5 = gMC->VolId("V0R5");
1022      static Int_t idV0L5 = gMC->VolId("V0L5");
1023      static Int_t idV0R6 = gMC->VolId("V0R6");
1024      static Int_t idV0L6 = gMC->VolId("V0L6");
1025
1026      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
1027                gMC->CurrentVolID(copy) == idV0L1 )
1028                ringNumber = 1.0;
1029      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
1030                gMC->CurrentVolID(copy) == idV0L2 )
1031                ringNumber = 2.0;
1032      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
1033                gMC->CurrentVolID(copy) == idV0L3 )
1034                ringNumber = 3.0;
1035      else if ( gMC->CurrentVolID(copy) == idV0R4 ||
1036                gMC->CurrentVolID(copy) == idV0L4 )
1037                ringNumber = 4.0;
1038      else if ( gMC->CurrentVolID(copy) == idV0R5 ||
1039                gMC->CurrentVolID(copy) == idV0L5 ||
1040                gMC->CurrentVolID(copy) == idV0R6 ||
1041                gMC->CurrentVolID(copy) == idV0L6 )
1042                ringNumber = 5.0;
1043      else
1044                ringNumber = 0.0;
1045
1046      if  (  ringNumber > 0.5  ) {
1047
1048         destep    = gMC->Edep();
1049         step      = gMC->TrackStep();
1050         eloss    += destep;
1051         tlength  += step;
1052
1053         if  ( gMC->IsTrackEntering()  )  {
1054
1055             gMC->TrackPosition(pos);
1056
1057             gMC->TrackMomentum(mom);
1058             Double_t tc   = mom[0]*mom[0]+mom[1]*mom[1];
1059             Double_t pt   = TMath::Sqrt(tc);
1060             Double_t pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
1061             theta   = Float_t(TMath::ATan2(pt,Double_t(mom[2])))*kRaddeg;
1062             phi     = Float_t(TMath::ATan2(Double_t(pos[1]),Double_t(pos[0])))*kRaddeg;
1063
1064 ////////////////////////////////////////////////////////////////////////////
1065      Float_t angle1 = Float_t(TMath::ATan2(Double_t(pos[1]),Double_t(pos[0])))*kRaddeg;
1066      if(angle1 < 0.0) angle1 = angle1 + 360.0;
1067      printf(" RingNumber, copy, phi1  = %f %d %f \n\n", ringNumber,vol[1],angle1);
1068 ////////////////////////////////////////////////////////////////////////////
1069
1070
1071             ipart  = gMC->TrackPid();
1072
1073             hits[0]  = pos[0];
1074             hits[1]  = pos[1];
1075             hits[2]  = pos[2];
1076             hits[3]  =  Float_t (ipart);
1077
1078             hits[4]  = gMC->TrackTime();
1079             hits[5]  = gMC->TrackCharge();
1080             hits[6]  = theta;
1081             hits[7]  = phi;
1082             hits[8]  = ringNumber;
1083
1084             hits[9]  = pt;
1085             hits[10] = pmom;
1086             hits[11] = mom[0];
1087             hits[12] = mom[1];
1088             hits[13] = mom[2];
1089
1090             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
1091             hits[14] = par->Vx();
1092             hits[15] = par->Vy();
1093             hits[16] = par->Vz();
1094
1095             tlength  = 0.0;
1096             eloss    = 0.0;
1097
1098          }
1099
1100          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1101
1102          hits[17] =   eloss;
1103          hits[18] = tlength;
1104
1105          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
1106
1107          tlength  = 0.0;
1108          eloss    = 0.0;
1109
1110          }
1111     }
1112
1113 }
1114
1115 //_____________________________________________________________________________
1116 void AliVZEROv2::AddHit(Int_t track, Int_t *vol, Float_t *hits)
1117 {
1118
1119 //  Adds a VZERO hit
1120
1121   TClonesArray &lhits = *fHits;
1122   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
1123 }
1124
1125 //_____________________________________________________________________________
1126 void AliVZEROv2::AddDigits(Int_t *tracks, Int_t* digits)
1127 {
1128
1129 //  Adds a VZERO digit
1130
1131    TClonesArray  &ldigits = *fDigits;
1132    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1133 }
1134
1135 //_____________________________________________________________________________
1136 void AliVZEROv2::MakeBranch(Option_t *option)
1137 {
1138
1139 // Creates new branches in the current Root Tree
1140
1141   char branchname[10];
1142   sprintf(branchname,"%s",GetName());
1143   printf(" fBufferSize = %d \n",fBufferSize);
1144
1145   const char *cH = strstr(option,"H");
1146
1147   if (fHits   && TreeH() && cH) {
1148     TreeH()->Branch(branchname,&fHits, fBufferSize);
1149     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1150   }
1151
1152   const char *cD = strstr(option,"D");
1153
1154   if (fDigits   && fLoader->TreeD() && cD) {
1155     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1156     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1157   }
1158
1159 }