VZERO/AliVZEROv3.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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   6  *                                                                        *
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  10  * copies and that both the copyright notice and this permission notice   *
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  15
  16 /* $Id$ */
  17
  18 //////////////////////////////////////////////////////////////////////
  19 //                                                                  //
  20 //  (V-zero) detector  version 3  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   4th of december 2003                         //
  24 //  (now 3 rings instead of 5 rings as in previous versions -budget //
  25 //   cuts !! - therefore changes in cell dimensions and offsets)    //
  26 //   previous ring 1 and ring 2 become now ring 1                   //
  27 //   previous ring 3 and ring 4 become now ring 2                   //
  28 //   previous ring 5 becomes now ring 3  - both for Left and Right  //
  29 //   V0R (now V0C) sits between Z values  -89.4 and  -84.9 cm       //
  30 //   V0L (now V0A) sits between Z values +350.0 and +352.0 cm       //
  31 //   New coordinate system has been implemented in october 2003     //
  32 //                                                                  //
  33 //////////////////////////////////////////////////////////////////////
  34
  35 // --- Standard libraries ---
  36 #include <Riostream.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39
  40 // --- ROOT libraries ---
  41 #include <TClonesArray.h>
  42 #include <TGeometry.h>
  43 #include <TLorentzVector.h>
  44 #include <TMath.h>
  45 #include <TNode.h>
  46 #include <TObjectTable.h>
  47 #include <TTUBE.h>
  48 #include <TTUBS.h>
  49 #include <TVirtualMC.h>
  50 #include <TParticle.h>
  51
  52 // --- AliRoot header files ---
  53 #include "AliConst.h"
  54 #include "AliLog.h"
  55 #include "AliMC.h"
  56 #include "AliMagF.h"
  57 #include "AliRun.h"
  58 #include "AliVZEROLoader.h"
  59 #include "AliVZEROdigit.h"
  60 #include "AliVZEROhit.h"
  61 #include "AliVZEROv3.h"
  62
  63 ClassImp(AliVZEROv3)
  64
  65 //_____________________________________________________________________________
  66 AliVZEROv3:: AliVZEROv3():AliVZERO(),
  67    fCellId(0),
  68    fTrackPosition(),
  69    fTrackMomentum(),
  70    fLightYield(93.75),
  71    fLightAttenuation(0.05),
  72    fnMeters(15.0),
  73    fFibToPhot(0.3)
  74 {
  75 // Standard default constructor
  76 }
  77
  78 //_____________________________________________________________________________
  79 AliVZEROv3::AliVZEROv3(const char *name, const char *title):
  80    AliVZERO(name,title),
  81    fCellId(0),
  82    fTrackPosition(),
  83    fTrackMomentum(),
  84    fLightYield(93.75),
  85    fLightAttenuation(0.05),
  86    fnMeters(15.0),
  87    fFibToPhot(0.3)
  88 {
  89
  90 // Standard constructor for V-zero Detector  version 2
  91
  92   AliDebug(2,"Create VZERO object");
  93
  94 //   fLightYield              =  93.75;
  95 //   fLightAttenuation        =   0.05;
  96 //   fnMeters                 =   15.0;
  97 //   fFibToPhot               =    0.3;
  98
  99 }
 100
 101 //_____________________________________________________________________________
 102 void AliVZEROv3::CreateGeometry()
 103 {
 104
 105 // Creates the GEANT geometry of the V-zero Detector  version 3
 106
 107   AliDebug(2,"Create VZERO Geometry");
 108
 109   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 110
 111   Int_t    ndetR = 1;
 112   Int_t    ndetL = 1;
 113
 114   Int_t    ncellsR = 1;
 115   Int_t    ncellsL = 1;
 116
 117   Int_t    idrotm[999];
 118
 119   Float_t  height1Right, height2Right, height3Right;
 120   Float_t  heightRight;
 121   Float_t  theta;
 122
 123   Float_t  halfThickQua;
 124
 125   Float_t  zdet;
 126   Float_t  r0Right, r3Right;
 127   Float_t  pi = TMath::Pi();
 128
 129   height1Right    =     1.82 + 3.81;  // height of cell 1, in cm
 130   height2Right    =     4.72 + 7.12;  // height of cell 2, in cm
 131   height3Right    =           10.83;  // height of cell 3, in cm
 132
 133   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 134
 135   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 136
 137 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 138 // absorber nose sitting at 90 cm. Will use -zdet later...
 139 // size of V0R box  (fThickness) is increased by 1 mm as compared to version v2
 140
 141   fThickness  =    fThickness + 0.1;
 142   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 143   r0Right     =    4.05;          // closest distance to center of the beam pipe
 144   heightRight =    height1Right + height2Right + height3Right;
 145   r3Right     =    r0Right + heightRight;
 146
 147 // Creation of mother volume v0LE - left part - :
 148 // Entrance face at  +350.0 cm  (new coordinate system) ...
 149
 150    Float_t   partube[3];
 151
 152    partube[0] =  4.3;
 153    partube[1] = 45.0;
 154    partube[2] = fThickness1/2.0;
 155
 156    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 157
 158 // Creation of five rings - left part - :
 159 // Entrance face at +350.0 cm  (new coordinate system) ...
 160
 161 // Mother volume v0L0 in which will be set 5 scintillator cells
 162
 163   Float_t   partubs[5];
 164
 165   Float_t   r0Left      =   4.3;
 166   Float_t   height1Left =   2.6 +  4.1;  // previous ring 1 + ring 2
 167   Float_t   height2Left =   6.4 + 10.2;  // previous ring 3 + ring 4
 168   Float_t   height3Left =  16.9;
 169   Float_t   heightLeft  =   height1Left + height2Left + height3Left;
 170
 171   Float_t   r3Left      =   r0Left  + heightLeft;
 172
 173   partubs[0]     =  r0Left;
 174   partubs[1]     =  r3Left;
 175   partubs[2]     =  fThickness1/2.0;
 176   partubs[3]     =  90.0-15.0;
 177   partubs[4]     = 120.0-15.0;
 178
 179   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 180
 181   Float_t  r1Left =  r0Left + height1Left;
 182
 183   partubs[0]     =  r0Left;
 184   partubs[1]     =  r1Left;
 185
 186   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 187   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 188
 189   Float_t  r2Left  =  r1Left + height2Left;
 190
 191   partubs[0]     =  r1Left;
 192   partubs[1]     =  r2Left;
 193
 194   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 195   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 196
 197   partubs[0]     =  r2Left;
 198   partubs[1]     =  r3Left;
 199
 200   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 201   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 202
 203
 204 // Creation of mother volume v0RI - right part - :
 205
 206   partube[0] = r0Right - 0.2;
 207   partube[1] = r3Right + 1.0;
 208   partube[2] = fThickness/2.0;
 209
 210   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 211
 212 // Creation of  carbon lids (3.5 mm thick) to keep v0RI box shut...
 213
 214   Float_t  lidThickness = 0.35;
 215
 216   partube[0] =   r0Right;
 217   partube[1] =   r3Right;
 218   partube[2] =   +lidThickness/2.0;
 219
 220   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 221   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 222   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 223
 224 // Creation of aluminum rings to maintain the v0RI pieces ...
 225
 226   partube[0] =   r0Right - 0.2;
 227   partube[1] =   r0Right;
 228   partube[2] =   +fThickness/2.0;
 229
 230   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 231   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 232
 233   partube[0] =   r3Right;
 234   partube[1] =   r3Right + 1.0;
 235   partube[2] =   +fThickness/2.0;
 236
 237   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 238   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 239
 240 // Mother volume v0R0 in which will be set 3  scintillator cells
 241
 242   partubs[0]      =  r0Right;
 243   partubs[1]      =  r3Right;
 244   partubs[2]      =  fThickness/2.0;
 245   partubs[3]      =  90.0-15.0;
 246   partubs[4]      = 120.0-15.0;
 247
 248   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 249
 250 // Elementary cell of ring 1 :
 251 // (cells of ring 1  will be shifted by 1.7 cm towards vertex to output fibers)
 252
 253   Float_t   offsetFibers  =  1.7;
 254   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 255   Float_t   r1Right       =  r0Right + height1Right;
 256
 257   partubs[0]     =  r0Right;
 258   partubs[1]     =  r1Right;
 259   partubs[2]     =  fThickness1/2.0;
 260
 261   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 262   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 263
 264 // Elementary cell of ring 2 :
 265
 266   Float_t   r2Right   =  r1Right + height2Right;
 267
 268   partubs[0]     =  r1Right;
 269   partubs[1]     =  r2Right;
 270
 271   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 272   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 273
 274
 275 // Elementary cell of ring 3 :
 276
 277   partubs[0]     =  r2Right;
 278   partubs[1]     =  r3Right;
 279
 280   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 281   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 282
 283
 284   Float_t  phiDeg = 180./6.;
 285
 286 // Right part :
 287
 288   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 289       {
 290         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 291         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 292                           0.0,0.0,idrotm[902],"ONLY");
 293         ndetR++;
 294        }
 295
 296   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 297
 298   ncellsR = (ndetR - 1) * 3;
 299   AliInfo(Form("Number of cells on Right side =   %d",ncellsR));
 300
 301 // Left part :
 302
 303   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 304       {
 305         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 306         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 307                           0.0,0.0,idrotm[902],"ONLY");
 308         ndetL++;
 309        }
 310
 311   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 312
 313   ncellsL = (ndetL - 1) * 3;
 314   AliInfo(Form("Number of cells on Left side  =   %d",  ncellsL));
 315
 316 }
 317
 318 //_____________________________________________________________________________
 319 void AliVZEROv3::BuildGeometry()
 320 {
 321
 322 // Builds simple ROOT TNode geometry for event display
 323
 324   AliDebug(2,"VZERO BuildGeometry");
 325
 326   TNode *top;
 327
 328   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 329   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3;
 330   TNode *v0Lnode, *v0Lnode0;
 331   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3;
 332
 333   const int kColorVZERO  = kGreen;
 334
 335   top = gAlice->GetGeometry()->GetNode("alice");
 336
 337   Float_t  height1Right, height2Right, height3Right;
 338   Float_t  heightRight;
 339   Float_t  theta;
 340
 341   Float_t  halfThickQua;
 342   Float_t  zdet;
 343   Float_t  r0Right, r3Right;
 344   Float_t  pi = TMath::Pi();
 345
 346   height1Right      =     1.82 + 3.81;       // height of cell 1, in cm
 347   height2Right      =     4.72 + 7.12;       // height of cell 2, in cm
 348   height3Right      =           10.83;       // height of cell 3, in cm
 349
 350   theta             =    pi/6.0/2.0;
 351
 352   halfThickQua      =    fThickness1/2.0;
 353
 354   zdet              =    90.0 - 0.6 - fThickness/2.0;
 355   r0Right                =    4.05;
 356   heightRight            =    height1Right + height2Right + height3Right;
 357   r3Right                =    r0Right + heightRight;
 358
 359   Int_t     ndiv    =     1;
 360
 361   Float_t   partube[3];
 362
 363   partube[0] =  r0Right - 0.2;
 364   partube[1] =  r3Right + 1.0;
 365   partube[2] = fThickness/2.0;
 366
 367   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 368
 369   top->cd();
 370
 371   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 372
 373   v0Rnode->SetLineColor(kYellow);
 374   fNodes->Add(v0Rnode);
 375   v0Rnode->SetVisibility(2);
 376
 377 // Rondelles de carbone (epaisseur 3.5 mm) de maintien des cellules ...
 378
 379   Float_t  lidThickness = 0.35;
 380
 381   partube[0] =   r0Right;
 382   partube[1] =   r3Right;
 383   partube[2] =   +lidThickness/2.0;
 384
 385   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 386
 387   v0Rnode->cd();
 388   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 389   v0Rnode6->SetLineColor(kYellow);
 390   fNodes->Add(v0Rnode6);
 391   v0Rnode->cd();
 392   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 393   v0Rnode7->SetLineColor(kYellow);
 394   fNodes->Add(v0Rnode7);
 395
 396   partube[0] =   r0Right - 0.2;
 397   partube[1] =   r0Right;
 398   partube[2] =   +fThickness/2.0;
 399
 400   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 401
 402   v0Rnode->cd();
 403   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 404   v0Rnode8->SetLineColor(kYellow);
 405   fNodes->Add(v0Rnode8);
 406
 407   partube[0] =   r3Right;
 408   partube[1] =   r3Right + 1.0;
 409   partube[2] =   +fThickness/2.0;
 410
 411   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 412
 413   v0Rnode->cd();
 414   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 415   v0Rnode9->SetLineColor(kYellow);
 416   fNodes->Add(v0Rnode9);
 417
 418   Float_t   partubs[5];
 419
 420   partubs[0]      =  r0Right;
 421   partubs[1]      =  r3Right;
 422   partubs[2]      =  fThickness/2.0;
 423   partubs[3]      =  90.0-15.0;
 424   partubs[4]      = 120.0-15.0;
 425
 426   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 427                                                   partubs[3], partubs[4]);
 428
 429   v0R0->SetNumberOfDivisions(ndiv);
 430
 431   Float_t   r1Right =  r0Right + height1Right;
 432   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 433   Float_t   offsetFibers = 1.7;
 434
 435   partubs[0]     =  r0Right;
 436   partubs[1]     =  r1Right;
 437   partubs[2]     =  fThickness1/2.0;
 438
 439   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 440                                                   partubs[3], partubs[4]);
 441
 442   v0R1->SetNumberOfDivisions(ndiv);
 443
 444   Float_t   r2Right   =  r1Right + height2Right;
 445
 446   partubs[0]     =  r1Right;
 447   partubs[1]     =  r2Right;
 448
 449   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 450                                                   partubs[3], partubs[4]);
 451
 452   v0R2->SetNumberOfDivisions(ndiv);
 453
 454   partubs[0]     =  r2Right;
 455   partubs[1]     =  r3Right;
 456
 457   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 458                                                   partubs[3], partubs[4]);
 459   v0R3->SetNumberOfDivisions(ndiv);
 460
 461   Float_t  phi;
 462   Float_t  phiDeg= 180./6.;
 463
 464   Int_t    ndetR = 1;
 465
 466   char     nameNode[12];
 467
 468   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 469
 470   {
 471
 472     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 473
 474     sprintf(nameNode,"SUBDER%d",ndetR);
 475
 476     v0Rnode->cd();
 477     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 478     v0Rnode0->SetLineColor(kYellow);
 479     fNodes->Add(v0Rnode0);
 480     ndetR++;
 481
 482     sprintf(nameNode,"SUBDER%d",ndetR);
 483     v0Rnode0->cd();
 484     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset+ offsetFibers ,0);
 485     v0Rnode1->SetLineColor(kColorVZERO);
 486     fNodes->Add(v0Rnode1);
 487     ndetR++;
 488
 489     sprintf(nameNode,"SUBDER%d",ndetR);
 490     v0Rnode0->cd();
 491     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset,0);
 492     v0Rnode2->SetLineColor(kColorVZERO);
 493     fNodes->Add(v0Rnode2);
 494     ndetR++;
 495
 496     sprintf(nameNode,"SUBDER%d",ndetR);
 497     v0Rnode0->cd();
 498     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset,0);
 499     v0Rnode3->SetLineColor(kColorVZERO);
 500     fNodes->Add(v0Rnode3);
 501     ndetR++;
 502
 503     v0Rnode0->SetVisibility(2);
 504
 505   }
 506
 507 // Left side of VZERO :
 508
 509   Float_t   r0Left      =   4.3;
 510   Float_t   height1Left =   2.6 +  4.1;
 511   Float_t   height2Left =   6.4 + 10.2;
 512   Float_t   height3Left =   16.9;
 513   Float_t   heightLeft  = height1Left + height2Left + height3Left;
 514
 515   Float_t   r3Left      = r0Left  + heightLeft;
 516
 517   partube[0] =  r0Left;
 518   partube[1] =  r3Left;
 519   partube[2] =  fThickness1/2.0;
 520
 521   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 522
 523   top->cd();
 524
 525   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 526
 527   v0Lnode->SetLineColor(kBlue);
 528   fNodes->Add(v0Lnode);
 529
 530   v0Lnode->SetVisibility(2);
 531
 532   partubs[0]      =  r0Left;
 533   partubs[1]      =  r3Left;
 534   partubs[2]      =  fThickness1/2.0;
 535   partubs[3]      =  90.0-15.0;
 536   partubs[4]      = 120.0-15.0;
 537
 538   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 539                                                   partubs[3], partubs[4]);
 540
 541   v0L0->SetNumberOfDivisions(ndiv);
 542   v0L0->SetLineColor(7);
 543
 544   Float_t   offsetLeft;
 545   offsetLeft    = - fThickness1/2.0;
 546
 547   Float_t   r1Left =  r0Left + height1Left;
 548
 549   partubs[0]     =  r0Left;
 550   partubs[1]     =  r1Left;
 551
 552   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 553                                                   partubs[3], partubs[4]);
 554   v0L1->SetNumberOfDivisions(ndiv);
 555
 556   Float_t   r2Left =  r1Left + height2Left;
 557
 558   partubs[0]     =  r1Left;
 559   partubs[1]     =  r2Left;
 560
 561   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 562                                                   partubs[3], partubs[4]);
 563   v0L2->SetNumberOfDivisions(ndiv);
 564
 565   partubs[0]     =  r2Left;
 566   partubs[1]     =  r3Left;
 567
 568   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 569                                                   partubs[3], partubs[4]);
 570   v0L3->SetNumberOfDivisions(ndiv);
 571
 572   Int_t    ndetL   = 1;
 573
 574   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 575
 576   {
 577
 578     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 579
 580
 581     sprintf(nameNode,"SUBDEL%d",ndetL);
 582
 583     v0Lnode->cd();
 584     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 585     v0Lnode0->SetLineColor(kColorVZERO);
 586     fNodes->Add(v0Lnode0);
 587     ndetL++;
 588
 589     sprintf(nameNode,"SUBDEL%d",ndetL);
 590     v0Lnode0->cd();
 591     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 592     v0Lnode1->SetLineColor(kColorVZERO);
 593     fNodes->Add(v0Lnode1);
 594     ndetL++;
 595
 596     sprintf(nameNode,"SUBDEL%d",ndetL);
 597     v0Lnode0->cd();
 598     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 599     v0Lnode2->SetLineColor(kColorVZERO);
 600     fNodes->Add(v0Lnode2);
 601     ndetL++;
 602
 603     sprintf(nameNode,"SUBDEL%d",ndetL);
 604     v0Lnode0->cd();
 605     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 606     v0Lnode3->SetLineColor(kColorVZERO);
 607     fNodes->Add(v0Lnode3);
 608     ndetL++;
 609
 610     v0Lnode0->SetVisibility(2);
 611
 612   }
 613
 614 }
 615
 616 //_____________________________________________________________________________
 617 void AliVZEROv3::CreateMaterials()
 618 {
 619
 620 // Creates materials used for geometry
 621
 622     AliDebug(2,"VZERO create materials");
 623
 624 /*
 625     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,
 626                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 627
 628
 629     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,
 630                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 631
 632     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 633                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 634                                  1.662295, 1.68337 };
 635
 636     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 637                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 638
 639     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 640
 641
 642     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 643
 644
 645     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,
 646                                1e-4,1e-4,1e-4,1e-4 };
 647     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 648
 649 */
 650
 651     Int_t *idtmed = fIdtmed->GetArray()-2999;
 652
 653
 654 //  Parameters related to Quarz (SiO2) :
 655
 656     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 657     Int_t nlmatqua;
 658
 659     aqua[0]    = 28.09;
 660     aqua[1]    = 16.;
 661     zqua[0]    = 14.;
 662     zqua[1]    = 8.;
 663     densqua    = 2.64;
 664     nlmatqua   = -2;
 665     wmatqua[0] = 1.;
 666     wmatqua[1] = 2.;
 667
 668 // Parameters  related to aluminum sheets :
 669
 670     Float_t  aal   = 26.98;
 671     Float_t  zal   = 13.00;
 672     Float_t  densal=   2.7;
 673     Float_t  radlal=   8.9;
 674
 675 // Parameters  related to scintillator CH :
 676
 677     Float_t ascin[2] = {1.00794,12.011};
 678     Float_t zscin[2] = {1.,6.};
 679     Float_t wscin[2] = {1.,1.};
 680     Float_t denscin  = 1.032;
 681
 682 // AIR
 683
 684     Float_t aAir[4]={12.,14.,16.,36.};
 685     Float_t zAir[4]={6.,7.,8.,18.};
 686     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 687     Float_t dAir = 1.20479E-3;
 688
 689 //  Definition of materials :
 690
 691 // AIR
 692
 693     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 694     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 695     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 696     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 697     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 698     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 699
 700     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 701
 702
 703     Int_t   iSXFLD = gAlice->Field()->Integ();
 704     Float_t sXMGMX = gAlice->Field()->Max();
 705
 706     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 707
 708     tmaxfd = 10.;
 709     stemax = 0.1;
 710     deemax = 0.1;
 711     epsil  = 0.001;
 712     stmin  = 0.001;
 713
 714 //  Active Air :
 715     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 716               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 717
 718 //  Inactive air :
 719
 720     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 721               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 722
 723     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 724               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 725
 726     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 727               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 728
 729     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 730               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 731
 732
 733     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 734               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 735
 736     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 737
 738     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 739     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 740     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 741     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 742
 743     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 744     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 745     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 746     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 747
 748     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 749     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 750     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 751     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 752     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 753     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 754
 755     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 756     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 757     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 758     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 759
 760     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 761     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 762     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 763     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 764     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 765     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 766
 767     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 768     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 769     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 770     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 771     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 772     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 773
 774
 775 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 776 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 777
 778 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 779 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 780
 781 }
 782
 783 //_____________________________________________________________________________
 784 void AliVZEROv3::DrawModule() const
 785 {
 786
 787 //  Drawing is done in DrawVZERO.C
 788
 789    AliDebug(2,"VZERO DrawModule");
 790
 791 }
 792
 793 //_____________________________________________________________________________
 794 void AliVZEROv3::Init()
 795 {
 796 // Initialises version 2 of the VZERO Detector
 797 // Just prints an information message
 798
 799   AliInfo(Form("VZERO version %d initialized",IsVersion()));
 800
 801 //   gMC->SetMaxStep(fMaxStepAlu);
 802 //   gMC->SetMaxStep(fMaxStepQua);
 803
 804     AliVZERO::Init();
 805
 806 }
 807
 808
 809 //_____________________________________________________________________________
 810 void AliVZEROv3::StepManager()
 811 {
 812
 813 // Step Manager, called at each step
 814
 815      Int_t     copy;
 816      static    Int_t   vol[4];
 817      static    Float_t hits[21];
 818      static    Float_t eloss, tlength;
 819      static    Int_t   nPhotonsInStep;
 820      static    Int_t   nPhotons;
 821      static    Int_t   numStep;
 822      Float_t   ringNumber;
 823      Float_t   destep, step;
 824
 825      numStep += 1;
 826
 827 //   We keep only charged tracks :
 828
 829      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 830
 831      static Int_t idV0R1 = gMC->VolId("V0R1");
 832      static Int_t idV0L1 = gMC->VolId("V0L1");
 833      static Int_t idV0R2 = gMC->VolId("V0R2");
 834      static Int_t idV0L2 = gMC->VolId("V0L2");
 835      static Int_t idV0R3 = gMC->VolId("V0R3");
 836      static Int_t idV0L3 = gMC->VolId("V0L3");
 837
 838      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 839      vol[2]    = gMC->CurrentVolID(copy);
 840      vol[3]    = copy;
 841
 842      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 843                gMC->CurrentVolID(copy) == idV0L1 )
 844                ringNumber = 1.0;
 845      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 846                gMC->CurrentVolID(copy) == idV0L2 )
 847                ringNumber = 2.0;
 848      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 849                gMC->CurrentVolID(copy) == idV0L3 )
 850                ringNumber = 3.0;
 851      else
 852                ringNumber = 0.0;
 853
 854      if  (  ringNumber > 0.5  ) {
 855
 856         destep    = gMC->Edep();
 857         step      = gMC->TrackStep();
 858
 859         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 860         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 861
 862         eloss    += destep;
 863         tlength  += step;
 864
 865         if  ( gMC->IsTrackEntering()  )  {
 866
 867             nPhotons  =  nPhotonsInStep;
 868             gMC->TrackPosition(fTrackPosition);
 869             gMC->TrackMomentum(fTrackMomentum);
 870
 871             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 872                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 873
 874             hits[0]  = fTrackPosition.X();
 875             hits[1]  = fTrackPosition.Y();
 876             hits[2]  = fTrackPosition.Z();
 877             hits[3]  = Float_t (gMC->TrackPid());
 878
 879             hits[4]  = gMC->TrackTime();
 880             hits[5]  = gMC->TrackCharge();
 881             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 882             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 883             hits[8]  = ringNumber;
 884
 885             hits[9]  = pt;
 886             hits[10] = fTrackMomentum.P();
 887             hits[11] = fTrackMomentum.Px();
 888             hits[12] = fTrackMomentum.Py();
 889             hits[13] = fTrackMomentum.Pz();
 890
 891             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 892             hits[14] = par->Vx();
 893             hits[15] = par->Vy();
 894             hits[16] = par->Vz();
 895
 896             tlength  = 0.0;
 897             eloss    = 0.0;
 898
 899          }
 900
 901          nPhotons  = nPhotons + nPhotonsInStep;
 902
 903          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 904
 905          nPhotons  = nPhotons - Int_t( (Float_t(nPhotons) * fLightAttenuation * fnMeters) );
 906          nPhotons  = nPhotons - Int_t(  Float_t(nPhotons) * fFibToPhot );
 907
 908          hits[17] =   eloss;
 909          hits[18] = tlength;
 910          hits[19] = nPhotons;
 911          hits[20] = GetCellId (vol, hits);
 912
 913          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 914
 915          tlength         = 0.0;
 916          eloss           = 0.0;
 917          nPhotons        =   0;
 918          nPhotonsInStep  =   0;
 919
 920          numStep         =   0;
 921          }
 922     }
 923
 924 }
 925
 926 //_____________________________________________________________________________
 927 void AliVZEROv3::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 928 {
 929
 930 //  Adds a VZERO hit
 931
 932   TClonesArray &lhits = *fHits;
 933   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 934 }
 935
 936 //_____________________________________________________________________________
 937 void AliVZEROv3::AddDigits(Int_t *tracks, Int_t* digits)
 938 {
 939
 940 //  Adds a VZERO digit
 941
 942    TClonesArray  &ldigits = *fDigits;
 943    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 944 }
 945
 946 //_____________________________________________________________________________
 947 void AliVZEROv3::MakeBranch(Option_t *option)
 948 {
 949
 950 // Creates new branches in the current Root Tree
 951
 952   char branchname[10];
 953   sprintf(branchname,"%s",GetName());
 954   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
 955
 956   const char *cH = strstr(option,"H");
 957
 958   if (fHits   && TreeH() && cH) {
 959     TreeH()->Branch(branchname,&fHits, fBufferSize);
 960     AliDebug(2,Form("Making Branch %s for hits",branchname));
 961   }
 962
 963   const char *cD = strstr(option,"D");
 964
 965   if (fDigits   && fLoader->TreeD() && cD) {
 966     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 967     AliDebug(2,Form("Making Branch %s for digits",branchname));
 968   }
 969
 970 }
 971
 972 //_____________________________________________________________________________
 973 Int_t AliVZEROv3::GetCellId(Int_t *vol, Float_t *hits)
 974 {
 975
 976   //   Returns Id of scintillator cell
 977   //   Right side from  0 to 35
 978   //   Left  side from 36 to 71
 979
 980    Int_t index = vol[1];
 981    fCellId     = 0;
 982
 983    if (index < 10) index = index + 12;
 984
 985    if (hits[2] < 0.0) {
 986       index = (index - 10) + ( ( Int_t(hits[8]) - 1 ) * 12);
 987       fCellId   = index;
 988    }
 989    else if (hits[2] > 0.0)
 990    {
 991       index = (index  + 26) + ( ( Int_t(hits[8]) - 1 ) * 12);
 992       fCellId   = index;}
 993
 994    return fCellId;
 995 }