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   *
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  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 <TGeometry.h>
  39 #include <TLorentzVector.h>
  40 #include <TMath.h>
  41 #include <TNode.h>
  42 #include <TObjectTable.h>
  43 #include <TTUBE.h>
  44 #include <TTUBS.h>
  45 #include <TVirtualMC.h>
  46 #include <TParticle.h>
  47
  48 // --- AliRoot header files ---
  49 #include "AliRun.h"
  50 #include "AliMC.h"
  51 #include "AliConst.h"
  52 #include "AliMagF.h"
  53 #include "AliVZEROLoader.h"
  54 #include "AliVZEROdigit.h"
  55 #include "AliVZEROhit.h"
  56 #include "AliVZEROv5.h"
  57
  58 ClassImp(AliVZEROv5)
  59
  60 //_____________________________________________________________________________
  61 AliVZEROv5:: AliVZEROv5():AliVZERO()
  62 {
  63 // Standard default constructor
  64 }
  65
  66 //_____________________________________________________________________________
  67 AliVZEROv5::AliVZEROv5(const char *name, const char *title):
  68  AliVZERO(name,title)
  69 {
  70
  71 // Standard constructor for V-zero Detector  version 5
  72
  73   Int_t i;
  74
  75   printf("\n");
  76   for(i=0;i<26;i++) printf("*");
  77   printf(" Create VZERO object ");
  78   for(i=0;i<26;i++) printf("*");
  79   printf("\n");
  80
  81   fLightYield              =  93.75; // Light yield in BC408 (93.75 eV per photon)
  82   fLightAttenuation        =   0.05; // Light attenuation in fiber (0.05 per meter)
  83   fnMeters                 =   15.0; // Number of meters of clear fibers to PM
  84   fFibToPhot               =    0.3; // Attenuation at fiber-photocathode interface
  85 }
  86
  87 //_____________________________________________________________________________
  88 void AliVZEROv5::CreateGeometry()
  89 {
  90
  91 // Creates the GEANT geometry of the V-zero Detector  version 5
  92
  93   Int_t i;
  94
  95   printf("\n");
  96   for(i=0;i<26;i++) printf("*");
  97   printf(" Create VZERO Geometry ");
  98   for(i=0;i<26;i++) printf("*");
  99   printf("\n");
 100
 101   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 102
 103   Int_t    ndetR = 1;
 104   Int_t    ndetL = 1;
 105
 106   Int_t    ncellsR = 1;
 107   Int_t    ncellsL = 1;
 108
 109   Int_t    idrotm[999];
 110
 111   Float_t  height1Right, height2Right, height3Right, height4Right;
 112   Float_t  heightRight;
 113   Float_t  theta;
 114
 115   Float_t  halfThickQua;
 116
 117   Float_t  zdet;
 118   Float_t  r0Right, r4Right, rBoxRight;
 119   Float_t  pi = TMath::Pi();
 120
 121   height1Right    =     2.6;  // height of cell 1, in cm
 122   height2Right    =     4.6;  // height of cell 2, in cm
 123   height3Right    =     7.6;  // height of cell 3, in cm
 124   height4Right    =    12.7;  // height of cell 4, in cm
 125
 126   theta       = pi/4.0/2.0;       // half angular opening = 22.5 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 // size of V0R box (fThickness) is increased by 3 mm as compared to basic version
 133
 134   fThickness  =    fThickness + 0.3;             // now 4.7 cm instead of 4.4 cm
 135   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 136   r0Right     =    4.20;          // closest distance to center of the beam pipe
 137   heightRight =    height1Right + height2Right + height3Right + height4Right;
 138   r4Right     =    r0Right + heightRight + 0.3;
 139   rBoxRight   =    38.0;          // external radius of right box
 140
 141 // Creation of mother volume v0LE - left part - :
 142 // Entrance face at  +339.0 cm  (new coordinate system) ...
 143
 144    Float_t   partube[3];
 145
 146    partube[0] =  4.3;
 147    partube[1] = 44.0;
 148    partube[2] = fThickness1/2.0;
 149
 150    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 151
 152 // Creation of five rings - left part - :
 153 // Entrance face at +339.0 cm  (new coordinate system) ...
 154
 155 // Mother volume v0L0 in which will be set 5 scintillator cells
 156
 157   Float_t   partubs[5];
 158
 159   Float_t   r0Left      =   4.3;
 160   Float_t   height1Left =   3.3;
 161   Float_t   height2Left =   6.2;
 162   Float_t   height3Left =   8.9;
 163   Float_t   height4Left =  20.9;
 164   Float_t   heightLeft  =   height1Left + height2Left + height3Left + height4Left;
 165
 166   Float_t   r4Left      =   r0Left  + heightLeft;
 167
 168   partubs[0]     =  r0Left;
 169   partubs[1]     =  r4Left;
 170   partubs[2]     =  fThickness1/2.0;
 171   partubs[3]     =  90.0-22.5;
 172   partubs[4]     = 135.0-22.5;
 173
 174   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 175
 176   Float_t  r1Left =  r0Left + height1Left;
 177
 178   partubs[0]     =  r0Left;
 179   partubs[1]     =  r1Left;
 180
 181   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 182   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 183
 184   Float_t  r2Left  =  r1Left + height2Left;
 185
 186   partubs[0]     =  r1Left;
 187   partubs[1]     =  r2Left;
 188
 189   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 190   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 191
 192   Float_t  r3Left  =  r2Left + height3Left;
 193
 194   partubs[0]     =  r2Left;
 195   partubs[1]     =  r3Left;
 196
 197   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 198   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 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 // Creation of mother volume v0RI - right part - :
 207
 208   partube[0] = r0Right - 0.2;
 209   partube[1] = r4Right + 1.0;
 210   partube[2] = fThickness/2.0;
 211
 212   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 213
 214 // Creation of  carbon lids (3.0 mm thick) to keep v0RI box shut...
 215
 216   Float_t  lidThickness = 0.30;
 217
 218   partube[0] =   r0Right;
 219   partube[1] =   rBoxRight;
 220   partube[2] =   +lidThickness/2.0;
 221
 222   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 223   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 224   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 225
 226 // Creation of aluminum rings 3.0 mm thick to maintain the v0RI pieces ...
 227
 228   partube[0] =   r0Right;
 229   partube[1] =   r0Right + 0.3;
 230   partube[2] =   +fThickness/2.0;
 231
 232   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 233   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 234
 235   partube[0] =   rBoxRight - 0.3;
 236   partube[1] =   rBoxRight;
 237   partube[2] =   +fThickness/2.0;
 238
 239   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 240   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 241
 242 // Mother volume v0R0 in which will be set 6 scintillator cells
 243
 244   partubs[0]      =  r0Right;
 245   partubs[1]      =  r4Right;
 246   partubs[2]      =  fThickness/2.0;
 247   partubs[3]      =  90.0-22.5;
 248   partubs[4]      = 135.0-22.5;
 249
 250   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 251
 252 // Elementary cell of ring 1 :
 253 // (cells of ring 1 will be shifted by 2.0 cm backwards to output fibers)
 254
 255   Float_t   offsetFibers  =  1.0;
 256   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 257   Float_t   r1Right       =  r0Right + 0.3 + height1Right;
 258
 259   partubs[0]     =  r0Right + 0.3;
 260   partubs[1]     =  r1Right;
 261   partubs[2]     =  fThickness1/2.0;
 262
 263   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 264   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 265
 266 // Elementary cell of ring 2 :
 267 // (cells of ring 2 will be shifted by 1.0 cm backwards to output fibers)
 268
 269   Float_t   r2Right   =  r1Right + height2Right;
 270
 271   partubs[0]     =  r1Right;
 272   partubs[1]     =  r2Right;
 273
 274   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 275   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 276
 277 // Elementary cell of ring 3 :
 278
 279   Float_t   r3Right   =  r2Right + height3Right;
 280
 281   partubs[0]     =  r2Right;
 282   partubs[1]     =  r3Right;
 283   partubs[3]     =  90.0-22.5;
 284   partubs[4]     = 112.5-22.5;
 285
 286   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 287   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 288
 289   partubs[3]     = 112.5-22.5;
 290   partubs[4]     = 135.0-22.5;
 291   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 292   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 293
 294 // Elementary cell of ring 4 :
 295
 296   partubs[0]     =  r3Right;
 297   partubs[1]     =  r4Right;
 298   partubs[3]     =  90.0-22.5;
 299   partubs[4]     = 112.5-22.5;
 300
 301   gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 302   gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 303
 304   partubs[3]     = 112.5-22.5;
 305   partubs[4]     = 135.0-22.5;
 306   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 307   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 308
 309   Float_t  phiDeg = 180./4.;
 310
 311 // Right part :
 312
 313   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 314       {
 315         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 316         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 317                           0.0,0.0,idrotm[902],"ONLY");
 318         ndetR++;
 319        }
 320
 321   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 322
 323   ncellsR = (ndetR - 1) * 6;
 324   printf("    Number of cells on Right side =   %d\n",  ncellsR);
 325
 326 // Left part :
 327
 328   for(Float_t  phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 329       {
 330         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 331         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 332                           0.0,0.0,idrotm[902],"ONLY");
 333         ndetL++;
 334        }
 335
 336   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,339.0+fThickness1/2.0,0,"ONLY");
 337
 338   ncellsL = (ndetL - 1) * 4;
 339   printf("    Number of cells on Left side  =   %d\n",  ncellsL);
 340   for(i=0;i<75;i++) printf("*");
 341   printf("\n");
 342
 343 }
 344
 345 //_____________________________________________________________________________
 346 void AliVZEROv5::BuildGeometry()
 347 {
 348
 349 // Builds simple ROOT TNode geometry for event display
 350
 351   Int_t i;
 352
 353   printf("\n");
 354   for(i=0;i<30;i++) printf("*");
 355   printf(" VZERO BuildGeometry ");
 356   for(i=0;i<30;i++) printf("*");
 357   printf("\n");
 358
 359   TNode *top;
 360
 361   TNode *v0Rnode,  *v0Rnode0, *v0Rnode7, *v0Rnode8, *v0Rnode9, *v0Rnode10;
 362   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3, *v0Rnode4, *v0Rnode5, *v0Rnode6;
 363   TNode *v0Lnode, *v0Lnode0;
 364   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3, *v0Lnode4;
 365
 366   const int kColorVZERO  = kGreen;
 367
 368   top = gAlice->GetGeometry()->GetNode("alice");
 369
 370   Float_t  height1Right, height2Right, height3Right, height4Right;
 371   Float_t  heightRight;
 372   Float_t  theta;
 373
 374   Float_t  halfThickQua;
 375   Float_t  zdet;
 376   Float_t  r0Right, r4Right, rBoxRight;
 377   Float_t  pi = TMath::Pi();
 378
 379   height1Right      =     2.6;  // height of cell 1, in cm
 380   height2Right      =     4.6;  // height of cell 2, in cm
 381   height3Right      =     7.6;  // height of cell 3, in cm
 382   height4Right      =    12.7;  // height of cell 4, in cm
 383
 384   theta             =    pi/4.0/2.0;
 385
 386   halfThickQua      =    fThickness1/2.0;
 387
 388   zdet              =    90.0 - 0.6 - fThickness/2.0;
 389   r0Right           =    4.20;
 390   heightRight       =    height1Right + height2Right + height3Right + height4Right;
 391   r4Right           =    r0Right + heightRight + 0.3;
 392   rBoxRight         =    38.0;
 393
 394   Int_t     ndiv    =     1;
 395
 396   Float_t   partube[3];
 397
 398   partube[0] =  r0Right - 0.2;
 399   partube[1] =  r4Right + 1.0;
 400   partube[2] = fThickness/2.0;
 401
 402   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 403
 404   top->cd();
 405
 406   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 407
 408   v0Rnode->SetLineColor(kYellow);
 409   fNodes->Add(v0Rnode);
 410   v0Rnode->SetVisibility(2);
 411
 412 // Rondelles de carbone (epaisseur 3.0 mm) de maintien des cellules ...
 413
 414   Float_t  lidThickness = 0.30;
 415
 416   partube[0] =   r0Right;
 417   partube[1] =   rBoxRight;
 418   partube[2] =   +lidThickness/2.0;
 419
 420   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 421
 422   v0Rnode->cd();
 423   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 424   v0Rnode7->SetLineColor(kYellow);
 425   fNodes->Add(v0Rnode7);
 426   v0Rnode->cd();
 427   v0Rnode8 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 428   v0Rnode8->SetLineColor(kYellow);
 429   fNodes->Add(v0Rnode8);
 430
 431   partube[0] =   r0Right;
 432   partube[1] =   r0Right + 0.3;
 433   partube[2] =   +fThickness/2.0;
 434
 435   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 436
 437   v0Rnode->cd();
 438   v0Rnode9 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 439   v0Rnode9->SetLineColor(kYellow);
 440   fNodes->Add(v0Rnode9);
 441
 442   partube[0] =   rBoxRight - 0.3;
 443   partube[1] =   rBoxRight;
 444   partube[2] =   +fThickness/2.0;
 445
 446   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 447
 448   v0Rnode->cd();
 449   v0Rnode10 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 450   v0Rnode10->SetLineColor(kYellow);
 451   fNodes->Add(v0Rnode10);
 452
 453   Float_t   partubs[5];
 454
 455   partubs[0]      =  r0Right;
 456   partubs[1]      =  r4Right;
 457   partubs[2]      =  fThickness/2.0;
 458   partubs[3]      =  90.0-22.5;
 459   partubs[4]      = 135.0-22.5;
 460
 461   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 462                                                   partubs[3], partubs[4]);
 463
 464   v0R0->SetNumberOfDivisions(ndiv);
 465
 466   Float_t   r1Right =  r0Right + 0.3 + height1Right;
 467   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 468   Float_t   offsetFibers = 1.0;
 469
 470   partubs[0]     =  r0Right + 0.3;
 471   partubs[1]     =  r1Right;
 472   partubs[2]     =  fThickness1/2.0;
 473
 474   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 475                                                   partubs[3], partubs[4]);
 476
 477   v0R1->SetNumberOfDivisions(ndiv);
 478
 479   Float_t   r2Right  =  r1Right + height2Right;
 480
 481   partubs[0]     =  r1Right;
 482   partubs[1]     =  r2Right;
 483
 484   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 485                                                   partubs[3], partubs[4]);
 486
 487   v0R2->SetNumberOfDivisions(ndiv);
 488
 489 // Ring 3 :
 490
 491   Float_t   r3Right  =  r2Right + height3Right;
 492
 493   partubs[0]     =  r2Right;
 494   partubs[1]     =  r3Right;
 495   partubs[3]     =  90.0-22.5;
 496   partubs[4]     = 112.5-22.5;
 497
 498   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 499                                                   partubs[3], partubs[4]);
 500   v0R3->SetNumberOfDivisions(ndiv);
 501
 502   partubs[3]     = 112.5-22.5;
 503   partubs[4]     = 135.0-22.5;
 504
 505   TTUBS *v0R4 = new TTUBS("V0R4", "V0R4", "void", partubs[0], partubs[1], partubs[2],
 506                                                   partubs[3], partubs[4]);
 507   v0R4->SetNumberOfDivisions(ndiv);
 508
 509 // Ring 4 :
 510
 511   partubs[0]     =  r3Right;
 512   partubs[1]     =  r4Right;
 513   partubs[3]     =  90.0-22.5;
 514   partubs[4]     = 112.5-22.5;
 515
 516   TTUBS *v0R5 = new TTUBS("V0R5", "V0R5", "void", partubs[0], partubs[1], partubs[2],
 517                                                   partubs[3], partubs[4]);
 518   v0R5->SetNumberOfDivisions(ndiv);
 519
 520   partubs[3]     = 112.5-22.5;
 521   partubs[4]     = 135.0-22.5;
 522
 523   TTUBS *v0R6 = new TTUBS("V0R6", "V0R6", "void", partubs[0], partubs[1], partubs[2],
 524                                                   partubs[3], partubs[4]);
 525   v0R6->SetNumberOfDivisions(ndiv);
 526
 527   Float_t  phi;
 528   Float_t  phiDeg= 180./4.;
 529
 530   Int_t    ndetR = 1;
 531
 532   char     nameNode[12];
 533
 534   for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 535
 536   {
 537     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 538
 539     sprintf(nameNode,"SUBDER%d",ndetR);
 540
 541     v0Rnode->cd();
 542     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 543     v0Rnode0->SetLineColor(kYellow);
 544     fNodes->Add(v0Rnode0);
 545     ndetR++;
 546
 547     sprintf(nameNode,"SUBDER%d",ndetR);
 548     v0Rnode0->cd();
 549     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset ,0);
 550     v0Rnode1->SetLineColor(kColorVZERO);
 551     fNodes->Add(v0Rnode1);
 552     ndetR++;
 553
 554     sprintf(nameNode,"SUBDER%d",ndetR);
 555     v0Rnode0->cd();
 556     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset + offsetFibers,0);
 557     v0Rnode2->SetLineColor(kColorVZERO);
 558     fNodes->Add(v0Rnode2);
 559     ndetR++;
 560
 561     sprintf(nameNode,"SUBDER%d",ndetR);
 562     v0Rnode0->cd();
 563     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset + 2.0*offsetFibers,0);
 564     v0Rnode3->SetLineColor(kColorVZERO);
 565     fNodes->Add(v0Rnode3);
 566     ndetR++;
 567
 568     sprintf(nameNode,"SUBDER%d",ndetR);
 569     v0Rnode0->cd();
 570     v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset + 2.0*offsetFibers,0);
 571     v0Rnode4->SetLineColor(kColorVZERO);
 572     fNodes->Add(v0Rnode4);
 573     ndetR++;
 574
 575     sprintf(nameNode,"SUBDER%d",ndetR);
 576     v0Rnode0->cd();
 577     v0Rnode5 = new TNode(nameNode,nameNode,v0R5,0.0,0.0, -offset + 2.0*offsetFibers,0);
 578     v0Rnode5->SetLineColor(kColorVZERO);
 579     fNodes->Add(v0Rnode5);
 580     ndetR++;
 581
 582     sprintf(nameNode,"SUBDER%d",ndetR);
 583     v0Rnode0->cd();
 584     v0Rnode6 = new TNode(nameNode,nameNode,v0R6,0.0,0.0, -offset + 2.0*offsetFibers,0);
 585     v0Rnode6->SetLineColor(kColorVZERO);
 586     fNodes->Add(v0Rnode6);
 587     ndetR++;
 588
 589     v0Rnode0->SetVisibility(2);
 590   }
 591
 592 // Left side of VZERO :
 593
 594   Float_t   r0Left      =    4.3;
 595   Float_t   height1Left =    3.3;
 596   Float_t   height2Left =    6.2;
 597   Float_t   height3Left =    8.9;
 598   Float_t   height4Left =   20.9;
 599   Float_t   heightLeft  = height1Left + height2Left + height3Left + height4Left;
 600
 601   Float_t   r4Left      = r0Left  + heightLeft;
 602
 603   partube[0] =  r0Left;
 604   partube[1] =  r4Left;
 605   partube[2] =  fThickness1/2.0;
 606
 607   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 608
 609   top->cd();
 610
 611   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,339.0+fThickness1/2.0,0);
 612
 613   v0Lnode->SetLineColor(kBlue);
 614   fNodes->Add(v0Lnode);
 615
 616   v0Lnode->SetVisibility(2);
 617
 618   partubs[0]      =  r0Left;
 619   partubs[1]      =  r4Left;
 620   partubs[2]      =  fThickness1/2.0;
 621   partubs[3]      =  90.0-22.5;
 622   partubs[4]      = 135.0-22.5;
 623
 624   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 625                                                   partubs[3], partubs[4]);
 626
 627   v0L0->SetNumberOfDivisions(ndiv);
 628   v0L0->SetLineColor(7);
 629
 630   Float_t   offsetLeft;
 631   offsetLeft    = - fThickness1/2.0;
 632
 633   Float_t   r1Left =  r0Left + height1Left;
 634
 635   partubs[0]     =  r0Left;
 636   partubs[1]     =  r1Left;
 637
 638   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 639                                                   partubs[3], partubs[4]);
 640   v0L1->SetNumberOfDivisions(ndiv);
 641
 642   Float_t   r2Left =  r1Left + height2Left;
 643
 644   partubs[0]     =  r1Left;
 645   partubs[1]     =  r2Left;
 646
 647   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 648                                                   partubs[3], partubs[4]);
 649   v0L2->SetNumberOfDivisions(ndiv);
 650
 651   Float_t   r3Left =  r2Left + height3Left;
 652
 653   partubs[0]     =  r2Left;
 654   partubs[1]     =  r3Left;
 655
 656   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 657                                                   partubs[3], partubs[4]);
 658   v0L3->SetNumberOfDivisions(ndiv);
 659
 660   partubs[0]     =  r3Left;
 661   partubs[1]     =  r4Left;
 662
 663   TTUBS *v0L4 = new TTUBS("V0L4", "V0L4", "void", partubs[0], partubs[1], partubs[2],
 664                                                   partubs[3], partubs[4]);
 665   v0L4->SetNumberOfDivisions(ndiv);
 666
 667   Int_t    ndetL   = 1;
 668
 669   for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
 670
 671   {
 672
 673     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 674
 675     sprintf(nameNode,"SUBDEL%d",ndetL);
 676
 677     v0Lnode->cd();
 678     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 679     v0Lnode0->SetLineColor(kColorVZERO);
 680     fNodes->Add(v0Lnode0);
 681     ndetL++;
 682
 683     sprintf(nameNode,"SUBDEL%d",ndetL);
 684     v0Lnode0->cd();
 685     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 686     v0Lnode1->SetLineColor(kColorVZERO);
 687     fNodes->Add(v0Lnode1);
 688     ndetL++;
 689
 690     sprintf(nameNode,"SUBDEL%d",ndetL);
 691     v0Lnode0->cd();
 692     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 693     v0Lnode2->SetLineColor(kColorVZERO);
 694     fNodes->Add(v0Lnode2);
 695     ndetL++;
 696
 697     sprintf(nameNode,"SUBDEL%d",ndetL);
 698     v0Lnode0->cd();
 699     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 700     v0Lnode3->SetLineColor(kColorVZERO);
 701     fNodes->Add(v0Lnode3);
 702     ndetL++;
 703
 704     sprintf(nameNode,"SUBDEL%d",ndetL);
 705     v0Lnode0->cd();
 706     v0Lnode4 = new TNode(nameNode,nameNode,v0L4,0.0,0.0, 0.0,0);
 707     v0Lnode4->SetLineColor(kColorVZERO);
 708     fNodes->Add(v0Lnode4);
 709     ndetL++;
 710
 711     v0Lnode0->SetVisibility(2);
 712   }
 713 }
 714
 715 //_____________________________________________________________________________
 716 void AliVZEROv5::CreateMaterials()
 717 {
 718
 719 // Creates materials used for geometry
 720
 721     Int_t i;
 722
 723     printf("\n");
 724     for(i=0;i<25;i++) printf("*");
 725     printf(" VZERO create materials ");
 726     for(i=0;i<26;i++) printf("*");
 727     printf("\n");
 728
 729 /*
 730     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,
 731                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 732
 733
 734     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,
 735                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 736
 737     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 738                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 739                                  1.662295, 1.68337 };
 740
 741     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 742                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 743
 744     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 745
 746
 747     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 748
 749
 750     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,
 751                                1e-4,1e-4,1e-4,1e-4 };
 752     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 753
 754 */
 755
 756     Int_t *idtmed = fIdtmed->GetArray()-2999;
 757
 758
 759 //  Parameters related to Quarz (SiO2) :
 760
 761     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 762     Int_t nlmatqua;
 763
 764     aqua[0]    = 28.09;
 765     aqua[1]    = 16.;
 766     zqua[0]    = 14.;
 767     zqua[1]    = 8.;
 768     densqua    = 2.64;
 769     nlmatqua   = -2;
 770     wmatqua[0] = 1.;
 771     wmatqua[1] = 2.;
 772
 773 // Parameters  related to aluminum sheets :
 774
 775     Float_t  aal   = 26.98;
 776     Float_t  zal   = 13.00;
 777     Float_t  densal=   2.7;
 778     Float_t  radlal=   8.9;
 779
 780 // Parameters  related to scintillator CH :
 781
 782     Float_t ascin[2] = {1.00794,12.011};
 783     Float_t zscin[2] = {1.,6.};
 784     Float_t wscin[2] = {1.,1.};
 785     Float_t denscin  = 1.032;
 786
 787 // AIR
 788
 789     Float_t aAir[4]={12.,14.,16.,36.};
 790     Float_t zAir[4]={6.,7.,8.,18.};
 791     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 792     Float_t dAir = 1.20479E-3;
 793
 794 //  Definition of materials :
 795
 796     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 797     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 798     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 799     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 800     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 801     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 802
 803     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 804
 805
 806     Int_t   iSXFLD = gAlice->Field()->Integ();
 807     Float_t sXMGMX = gAlice->Field()->Max();
 808
 809     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 810
 811     tmaxfd = 10.;
 812     stemax = 0.1;
 813     deemax = 0.1;
 814     epsil  = 0.001;
 815     stmin  = 0.001;
 816
 817 //  Active Air :
 818     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 819               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 820
 821 //  Inactive air :
 822
 823     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 824               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 825
 826     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 827               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 828
 829     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 830               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 831
 832     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 833               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 834
 835
 836     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 837               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 838
 839     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 840
 841     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 842     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 843     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 844     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 845
 846     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 847     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 848     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 849     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 850
 851     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 852     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 853     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 854     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 855     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 856     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 857
 858     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 859     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 860     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 861     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 862
 863     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 864     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 865     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 866     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 867     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 868     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 869
 870     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 871     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 872     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 873     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 874     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 875     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 876
 877
 878 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 879 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 880
 881 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 882 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 883
 884 }
 885
 886 //_____________________________________________________________________________
 887 void AliVZEROv5::DrawModule() const
 888 {
 889
 890 //  Drawing is done in DrawVZERO.C
 891
 892    Int_t i;
 893
 894    printf("\n");
 895    for(i=0;i<30;i++) printf("*");
 896    printf(" VZERO DrawModule ");
 897    for(i=0;i<30;i++) printf("*");
 898    printf("\n");
 899 }
 900
 901 //_____________________________________________________________________________
 902 void AliVZEROv5::Init()
 903 {
 904 // Initialises version 2 of the VZERO Detector
 905 // Just prints an information message
 906
 907    printf(" VZERO version %d initialized \n",IsVersion());
 908
 909 //   gMC->SetMaxStep(fMaxStepAlu);
 910 //   gMC->SetMaxStep(fMaxStepQua);
 911
 912     AliVZERO::Init();
 913 }
 914
 915 //_____________________________________________________________________________
 916 void AliVZEROv5::StepManager()
 917 {
 918
 919 // Step Manager, called at each step
 920
 921      Int_t     copy;
 922      static    Int_t   vol[4];
 923      static    Float_t hits[21];
 924      static    Float_t eloss, tlength;
 925      static    Int_t   nPhotonsInStep;
 926      static    Int_t   nPhotons;
 927      static    Int_t   numStep;
 928      Float_t   ringNumber;
 929      Float_t   destep, step;
 930
 931      numStep += 1;
 932
 933 //   We keep only charged tracks :
 934
 935      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 936
 937      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 938      vol[2]    = gMC->CurrentVolID(copy);
 939      vol[3]    = copy;
 940
 941      static Int_t idV0R1 = gMC->VolId("V0R1");
 942      static Int_t idV0L1 = gMC->VolId("V0L1");
 943      static Int_t idV0R2 = gMC->VolId("V0R2");
 944      static Int_t idV0L2 = gMC->VolId("V0L2");
 945      static Int_t idV0R3 = gMC->VolId("V0R3");
 946      static Int_t idV0L3 = gMC->VolId("V0L3");
 947      static Int_t idV0R4 = gMC->VolId("V0R4");
 948      static Int_t idV0L4 = gMC->VolId("V0L4");
 949      static Int_t idV0R5 = gMC->VolId("V0R5");
 950      static Int_t idV0R6 = gMC->VolId("V0R6");
 951
 952      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 953                gMC->CurrentVolID(copy) == idV0L1 )
 954                ringNumber = 1.0;
 955      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 956                gMC->CurrentVolID(copy) == idV0L2 )
 957                ringNumber = 2.0;
 958      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 959                gMC->CurrentVolID(copy) == idV0R4 ||
 960                gMC->CurrentVolID(copy) == idV0L3 )
 961                ringNumber = 3.0;
 962      else if ( gMC->CurrentVolID(copy) == idV0R5 ||
 963                gMC->CurrentVolID(copy) == idV0R6 ||
 964                gMC->CurrentVolID(copy) == idV0L4 )
 965                ringNumber = 4.0;
 966      else
 967                ringNumber = 0.0;
 968
 969      if  (  ringNumber > 0.5  ) {
 970
 971         destep    = gMC->Edep();
 972         step      = gMC->TrackStep();
 973
 974         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 975         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 976
 977         eloss    += destep;
 978         tlength  += step;
 979
 980         if  ( gMC->IsTrackEntering()  )  {
 981
 982             nPhotons  =  nPhotonsInStep;
 983             gMC->TrackPosition(fTrackPosition);
 984             gMC->TrackMomentum(fTrackMomentum);
 985
 986             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 987                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 988
 989             hits[0]  = fTrackPosition.X();
 990             hits[1]  = fTrackPosition.Y();
 991             hits[2]  = fTrackPosition.Z();
 992             hits[3]  = Float_t (gMC->TrackPid());
 993
 994             hits[4]  = gMC->TrackTime();
 995             hits[5]  = gMC->TrackCharge();
 996             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 997             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 998             hits[8]  = ringNumber;
 999
1000             hits[9]  = pt;
1001             hits[10] = fTrackMomentum.P();
1002             hits[11] = fTrackMomentum.Px();
1003             hits[12] = fTrackMomentum.Py();
1004             hits[13] = fTrackMomentum.Pz();
1005
1006             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
1007             hits[14] = par->Vx();
1008             hits[15] = par->Vy();
1009             hits[16] = par->Vz();
1010
1011             tlength  = 0.0;
1012             eloss    = 0.0;
1013          }
1014
1015          nPhotons  = nPhotons + nPhotonsInStep;
1016
1017          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1018
1019          nPhotons  = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
1020          nPhotons  = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
1021
1022          hits[17] =   eloss;
1023          hits[18] = tlength;
1024          hits[19] = nPhotons;
1025          hits[20] = GetCellId (vol, hits);
1026
1027          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
1028
1029          tlength         = 0.0;
1030          eloss           = 0.0;
1031          nPhotons        =   0;
1032          nPhotonsInStep  =   0;
1033
1034          numStep         =   0;
1035          }
1036     }
1037
1038 }
1039
1040 //_____________________________________________________________________________
1041 void AliVZEROv5::AddHit(Int_t track, Int_t *vol, Float_t *hits)
1042 {
1043
1044 //  Adds a VZERO hit
1045
1046   TClonesArray &lhits = *fHits;
1047   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
1048 }
1049
1050 //_____________________________________________________________________________
1051 void AliVZEROv5::AddDigits(Int_t *tracks, Int_t* digits)
1052 {
1053
1054 //  Adds a VZERO digit
1055
1056    TClonesArray  &ldigits = *fDigits;
1057    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1058 }
1059
1060 //_____________________________________________________________________________
1061 void AliVZEROv5::MakeBranch(Option_t *option)
1062 {
1063
1064 // Creates new branches in the current Root Tree
1065
1066   char branchname[10];
1067   sprintf(branchname,"%s",GetName());
1068   printf(" fBufferSize = %d \n",fBufferSize);
1069
1070   const char *cH = strstr(option,"H");
1071
1072   if (fHits   && TreeH() && cH) {
1073     TreeH()->Branch(branchname,&fHits, fBufferSize);
1074     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1075   }
1076
1077   const char *cD = strstr(option,"D");
1078
1079   if (fDigits   && fLoader->TreeD() && cD) {
1080     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1081     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1082   }
1083
1084 }
1085
1086 //_____________________________________________________________________________
1087 Int_t AliVZEROv5::GetCellId(Int_t *vol, Float_t *hits)
1088 {
1089
1090   //   Returns Id of scintillator cell
1091   //   Right side from  0 to 47
1092   //   Left  side from 48 to 95
1093
1094   //   hits[8] = ring number (1 to 4)
1095   //   vol[1]  = copy number (1 to 8)
1096
1097    Int_t index      = vol[1];
1098    Int_t RingNumber = Int_t(hits[8]);
1099    fCellId          = 0;
1100
1101 //    cout << "volID = " << vol[0] << "  copy = " << vol[1] << endl;
1102 //    cout << "X     = " << hits[0] << "    Y = " << hits[1] << endl;
1103
1104    Float_t phi = Float_t(TMath::ATan2(Double_t(hits[1]),Double_t(hits[0])) );
1105    Float_t kRaddeg = 180.0/TMath::Pi();
1106    phi = kRaddeg * phi;
1107
1108    if (index < 7) index = index + 8;
1109
1110    if (hits[2] < 0.0) {
1111       if(RingNumber < 3) {
1112          index = (index - 7) + ( ( RingNumber - 1 ) * 8);}
1113       else if(RingNumber >= 3){
1114        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R3")||
1115           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R5") )
1116          {index = (index*2 - 14) + ( ( RingNumber - 2 ) * 16); }
1117        if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R4")||
1118           gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R6") )
1119          {index = (index*2 - 13) + ( ( RingNumber - 2 ) * 16); }
1120       }
1121       fCellId   = index;
1122    }
1123
1124    else if (hits[2] > 0.0){
1125       index = (index - 7 + 48) + ( ( RingNumber - 1 ) * 8);
1126       fCellId   = index;}
1127
1128 //    cout << " ring   = " << RingNumber << " phi = "<<  phi << endl;
1129 //    cout << " cellID = " << fCellId <<  endl;
1130 //    cout <<  "**********" << endl;
1131
1132    return fCellId;
1133
1134
1135 }