VZERO/AliVZEROv4.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 4  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   24th of february 2004                        //
  24 //  (now 4 rings instead of 3 rings as in previous version)         //
  25 //   V0R (now V0C) sits between Z values  -89.4 and  -84.9 cm       //
  26 //   V0L (now V0A) sits between Z values +350.0 and +352.0 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 "AliLog.h"
  53 #include "AliMagF.h"
  54 #include "AliVZEROLoader.h"
  55 #include "AliVZEROdigit.h"
  56 #include "AliVZEROhit.h"
  57 #include "AliVZEROv4.h"
  58
  59 ClassImp(AliVZEROv4)
  60
  61 //_____________________________________________________________________________
  62 AliVZEROv4:: AliVZEROv4():AliVZERO()
  63 {
  64 // Standard default constructor
  65 }
  66
  67 //_____________________________________________________________________________
  68 AliVZEROv4::AliVZEROv4(const char *name, const char *title):
  69  AliVZERO(name,title)
  70 {
  71
  72 // Standard constructor for V-zero Detector  version 2
  73
  74   AliDebug(2,"Create VZERO object");
  75
  76   fLightYield              =  93.75; // Light yield in BC408 (93.75 eV per photon)
  77   fLightAttenuation        =   0.05; // Light attenuation in fiber (0.05 per meter)
  78   fnMeters                 =   15.0; // Number of meters of clear fibers to PM
  79   fFibToPhot               =    0.3; // Attenuation at fiber-photocathode interface
  80 }
  81
  82 //_____________________________________________________________________________
  83 void AliVZEROv4::CreateGeometry()
  84 {
  85
  86 // Creates the GEANT geometry of the V-zero Detector  version 3
  87
  88   AliDebug(2,"Create VZERO Geometry ");
  89
  90   Int_t    *idtmed = fIdtmed->GetArray()-2999;
  91
  92   Int_t    ndetR = 1;
  93   Int_t    ndetL = 1;
  94
  95   Int_t    ncellsR = 1;
  96   Int_t    ncellsL = 1;
  97
  98   Int_t    idrotm[999];
  99
 100   Float_t  height1Right, height2Right, height3Right, height4Right;
 101   Float_t  heightRight;
 102   Float_t  theta;
 103
 104   Float_t  halfThickQua;
 105
 106   Float_t  zdet;
 107   Float_t  r0Right, r4Right;
 108   Float_t  pi = TMath::Pi();
 109
 110   height1Right    =     3.42;  // height of cell 1, in cm
 111   height2Right    =     6.78;  // height of cell 2, in cm
 112   height3Right    =     7.11;  // height of cell 3, in cm
 113   height4Right    =    10.91;  // height of cell 4, in cm
 114
 115   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 116
 117   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 118
 119 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 120 // absorber nose sitting at 90 cm. Will use -zdet later...
 121 // size of V0R box  (fThickness) is increased by 1 mm as compared to version v2
 122
 123   fThickness  =    fThickness + 0.1;
 124   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 125   r0Right     =    4.05;          // closest distance to center of the beam pipe
 126   heightRight =    height1Right + height2Right + height3Right + height4Right;
 127   r4Right     =    r0Right + heightRight;
 128
 129 // Creation of mother volume v0LE - left part - :
 130 // Entrance face at  +350.0 cm  (new coordinate system) ...
 131
 132    Float_t   partube[3];
 133
 134    partube[0] =  4.3;
 135    partube[1] = 45.0;
 136    partube[2] = fThickness1/2.0;
 137
 138    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 139
 140 // Creation of five rings - left part - :
 141 // Entrance face at +350.0 cm  (new coordinate system) ...
 142
 143 // Mother volume v0L0 in which will be set 5 scintillator cells
 144
 145   Float_t   partubs[5];
 146
 147   Float_t   r0Left      =   4.3;
 148   Float_t   height1Left =   3.6;
 149   Float_t   height2Left =   6.4;
 150   Float_t   height3Left =  14.9;
 151   Float_t   height4Left =  14.4;
 152   Float_t   heightLeft  =   height1Left + height2Left + height3Left + height4Left;
 153
 154   Float_t   r4Left      =   r0Left  + heightLeft;
 155
 156   partubs[0]     =  r0Left;
 157   partubs[1]     =  r4Left;
 158   partubs[2]     =  fThickness1/2.0;
 159   partubs[3]     =  90.0-15.0;
 160   partubs[4]     = 120.0-15.0;
 161
 162   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 163
 164   Float_t  r1Left =  r0Left + height1Left;
 165
 166   partubs[0]     =  r0Left;
 167   partubs[1]     =  r1Left;
 168
 169   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 170   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 171
 172   Float_t  r2Left  =  r1Left + height2Left;
 173
 174   partubs[0]     =  r1Left;
 175   partubs[1]     =  r2Left;
 176
 177   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 178   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 179
 180   Float_t  r3Left  =  r2Left + height3Left;
 181
 182   partubs[0]     =  r2Left;
 183   partubs[1]     =  r3Left;
 184
 185   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 186   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 187
 188   partubs[0]     =  r3Left;
 189   partubs[1]     =  r4Left;
 190
 191   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 192   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 193
 194 // Creation of mother volume v0RI - right part - :
 195
 196   partube[0] = r0Right - 0.2;
 197   partube[1] = r4Right + 1.0;
 198   partube[2] = fThickness/2.0;
 199
 200   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 201
 202 // Creation of  carbon lids (3.5 mm thick) to keep v0RI box shut...
 203
 204   Float_t  lidThickness = 0.35;
 205
 206   partube[0] =   r0Right;
 207   partube[1] =   r4Right;
 208   partube[2] =   +lidThickness/2.0;
 209
 210   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 211   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 212   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 213
 214 // Creation of aluminum rings to maintain the v0RI pieces ...
 215
 216   partube[0] =   r0Right - 0.2;
 217   partube[1] =   r0Right;
 218   partube[2] =   +fThickness/2.0;
 219
 220   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 221   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 222
 223   partube[0] =   r4Right;
 224   partube[1] =   r4Right + 1.0;
 225   partube[2] =   +fThickness/2.0;
 226
 227   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 228   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 229
 230 // Mother volume v0R0 in which will be set 4  scintillator cells
 231
 232   partubs[0]      =  r0Right;
 233   partubs[1]      =  r4Right;
 234   partubs[2]      =  fThickness/2.0;
 235   partubs[3]      =  90.0-15.0;
 236   partubs[4]      = 120.0-15.0;
 237
 238   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 239
 240 // Elementary cell of ring 1 :
 241 // (cells of ring 1  will be shifted by 1.7 cm towards vertex to output fibers)
 242
 243   Float_t   offsetFibers  =  1.7;
 244   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 245   Float_t   r1Right       =  r0Right + height1Right;
 246
 247   partubs[0]     =  r0Right;
 248   partubs[1]     =  r1Right;
 249   partubs[2]     =  fThickness1/2.0;
 250
 251   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 252   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 253
 254 // Elementary cell of ring 2 :
 255
 256   Float_t   r2Right   =  r1Right + height2Right;
 257
 258   partubs[0]     =  r1Right;
 259   partubs[1]     =  r2Right;
 260
 261   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 262   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 263
 264
 265 // Elementary cell of ring 3 :
 266
 267   Float_t   r3Right   =  r2Right + height3Right;
 268
 269   partubs[0]     =  r2Right;
 270   partubs[1]     =  r3Right;
 271
 272   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 273   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 274
 275 // Elementary cell of ring 4 :
 276
 277   partubs[0]     =  r3Right;
 278   partubs[1]     =  r4Right;
 279
 280   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 281   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 282
 283   Float_t  phiDeg = 180./6.;
 284
 285 // Right part :
 286
 287   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 288       {
 289         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 290         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 291                           0.0,0.0,idrotm[902],"ONLY");
 292         ndetR++;
 293        }
 294
 295   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 296
 297   ncellsR = (ndetR - 1) * 4;
 298   AliInfo(Form("Number of cells on Right side =   %d",  ncellsR));
 299
 300 // Left part :
 301
 302   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 303       {
 304         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 305         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 306                           0.0,0.0,idrotm[902],"ONLY");
 307         ndetL++;
 308        }
 309
 310   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 311
 312   ncellsL = (ndetL - 1) * 4;
 313   AliInfo(Form("Number of cells on Left side  =   %d",  ncellsL));
 314
 315 }
 316
 317 //_____________________________________________________________________________
 318 void AliVZEROv4::BuildGeometry()
 319 {
 320
 321 // Builds simple ROOT TNode geometry for event display
 322
 323   AliDebug(2,"VZERO BuildGeometry ");
 324
 325   TNode *top;
 326
 327   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 328   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3, *v0Rnode4;
 329   TNode *v0Lnode, *v0Lnode0;
 330   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3, *v0Lnode4;
 331
 332   const int kColorVZERO  = kGreen;
 333
 334   top = gAlice->GetGeometry()->GetNode("alice");
 335
 336   Float_t  height1Right, height2Right, height3Right, height4Right;
 337   Float_t  heightRight;
 338   Float_t  theta;
 339
 340   Float_t  halfThickQua;
 341   Float_t  zdet;
 342   Float_t  r0Right, r4Right;
 343   Float_t  pi = TMath::Pi();
 344
 345   height1Right      =     3.42;  // height of cell 1, in cm
 346   height2Right      =     6.78;  // height of cell 2, in cm
 347   height3Right      =     7.11;  // height of cell 3, in cm
 348   height4Right      =    10.91;  // height of cell 4, 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 + height4Right;
 357   r4Right           =    r0Right + heightRight;
 358
 359   Int_t     ndiv    =     1;
 360
 361   Float_t   partube[3];
 362
 363   partube[0] =  r0Right - 0.2;
 364   partube[1] =  r4Right + 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] =   r4Right;
 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] =   r4Right;
 408   partube[1] =   r4Right + 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]      =  r4Right;
 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   Float_t   r3Right  =  r2Right + height3Right;
 455
 456   partubs[0]     =  r2Right;
 457   partubs[1]     =  r3Right;
 458
 459   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 460                                                   partubs[3], partubs[4]);
 461   v0R3->SetNumberOfDivisions(ndiv);
 462
 463   partubs[0]     =  r3Right;
 464   partubs[1]     =  r4Right;
 465
 466   TTUBS *v0R4 = new TTUBS("V0R4", "V0R4", "void", partubs[0], partubs[1], partubs[2],
 467                                                   partubs[3], partubs[4]);
 468   v0R4->SetNumberOfDivisions(ndiv);
 469
 470   Float_t  phi;
 471   Float_t  phiDeg= 180./6.;
 472
 473   Int_t    ndetR = 1;
 474
 475   char     nameNode[12];
 476
 477   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 478
 479   {
 480     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 481
 482     sprintf(nameNode,"SUBDER%d",ndetR);
 483
 484     v0Rnode->cd();
 485     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 486     v0Rnode0->SetLineColor(kYellow);
 487     fNodes->Add(v0Rnode0);
 488     ndetR++;
 489
 490     sprintf(nameNode,"SUBDER%d",ndetR);
 491     v0Rnode0->cd();
 492     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset+ offsetFibers ,0);
 493     v0Rnode1->SetLineColor(kColorVZERO);
 494     fNodes->Add(v0Rnode1);
 495     ndetR++;
 496
 497     sprintf(nameNode,"SUBDER%d",ndetR);
 498     v0Rnode0->cd();
 499     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset,0);
 500     v0Rnode2->SetLineColor(kColorVZERO);
 501     fNodes->Add(v0Rnode2);
 502     ndetR++;
 503
 504     sprintf(nameNode,"SUBDER%d",ndetR);
 505     v0Rnode0->cd();
 506     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset,0);
 507     v0Rnode3->SetLineColor(kColorVZERO);
 508     fNodes->Add(v0Rnode3);
 509     ndetR++;
 510
 511     sprintf(nameNode,"SUBDER%d",ndetR);
 512     v0Rnode0->cd();
 513     v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset,0);
 514     v0Rnode4->SetLineColor(kColorVZERO);
 515     fNodes->Add(v0Rnode4);
 516     ndetR++;
 517
 518     v0Rnode0->SetVisibility(2);
 519   }
 520
 521 // Left side of VZERO :
 522
 523   Float_t   r0Left      =    4.3;
 524   Float_t   height1Left =    3.6;
 525   Float_t   height2Left =    6.4;
 526   Float_t   height3Left =   14.9;
 527   Float_t   height4Left =   14.4;
 528   Float_t   heightLeft  = height1Left + height2Left + height3Left + height4Left;
 529
 530   Float_t   r4Left      = r0Left  + heightLeft;
 531
 532   partube[0] =  r0Left;
 533   partube[1] =  r4Left;
 534   partube[2] =  fThickness1/2.0;
 535
 536   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 537
 538   top->cd();
 539
 540   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 541
 542   v0Lnode->SetLineColor(kBlue);
 543   fNodes->Add(v0Lnode);
 544
 545   v0Lnode->SetVisibility(2);
 546
 547   partubs[0]      =  r0Left;
 548   partubs[1]      =  r4Left;
 549   partubs[2]      =  fThickness1/2.0;
 550   partubs[3]      =  90.0-15.0;
 551   partubs[4]      = 120.0-15.0;
 552
 553   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 554                                                   partubs[3], partubs[4]);
 555
 556   v0L0->SetNumberOfDivisions(ndiv);
 557   v0L0->SetLineColor(7);
 558
 559   Float_t   offsetLeft;
 560   offsetLeft    = - fThickness1/2.0;
 561
 562   Float_t   r1Left =  r0Left + height1Left;
 563
 564   partubs[0]     =  r0Left;
 565   partubs[1]     =  r1Left;
 566
 567   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 568                                                   partubs[3], partubs[4]);
 569   v0L1->SetNumberOfDivisions(ndiv);
 570
 571   Float_t   r2Left =  r1Left + height2Left;
 572
 573   partubs[0]     =  r1Left;
 574   partubs[1]     =  r2Left;
 575
 576   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 577                                                   partubs[3], partubs[4]);
 578   v0L2->SetNumberOfDivisions(ndiv);
 579
 580   Float_t   r3Left =  r2Left + height3Left;
 581
 582   partubs[0]     =  r2Left;
 583   partubs[1]     =  r3Left;
 584
 585   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 586                                                   partubs[3], partubs[4]);
 587   v0L3->SetNumberOfDivisions(ndiv);
 588
 589   partubs[0]     =  r3Left;
 590   partubs[1]     =  r4Left;
 591
 592   TTUBS *v0L4 = new TTUBS("V0L4", "V0L4", "void", partubs[0], partubs[1], partubs[2],
 593                                                   partubs[3], partubs[4]);
 594   v0L4->SetNumberOfDivisions(ndiv);
 595
 596   Int_t    ndetL   = 1;
 597
 598   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 599
 600   {
 601
 602     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 603
 604     sprintf(nameNode,"SUBDEL%d",ndetL);
 605
 606     v0Lnode->cd();
 607     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 608     v0Lnode0->SetLineColor(kColorVZERO);
 609     fNodes->Add(v0Lnode0);
 610     ndetL++;
 611
 612     sprintf(nameNode,"SUBDEL%d",ndetL);
 613     v0Lnode0->cd();
 614     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 615     v0Lnode1->SetLineColor(kColorVZERO);
 616     fNodes->Add(v0Lnode1);
 617     ndetL++;
 618
 619     sprintf(nameNode,"SUBDEL%d",ndetL);
 620     v0Lnode0->cd();
 621     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 622     v0Lnode2->SetLineColor(kColorVZERO);
 623     fNodes->Add(v0Lnode2);
 624     ndetL++;
 625
 626     sprintf(nameNode,"SUBDEL%d",ndetL);
 627     v0Lnode0->cd();
 628     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 629     v0Lnode3->SetLineColor(kColorVZERO);
 630     fNodes->Add(v0Lnode3);
 631     ndetL++;
 632
 633     sprintf(nameNode,"SUBDEL%d",ndetL);
 634     v0Lnode0->cd();
 635     v0Lnode4 = new TNode(nameNode,nameNode,v0L4,0.0,0.0, 0.0,0);
 636     v0Lnode4->SetLineColor(kColorVZERO);
 637     fNodes->Add(v0Lnode4);
 638     ndetL++;
 639
 640     v0Lnode0->SetVisibility(2);
 641   }
 642 }
 643
 644 //_____________________________________________________________________________
 645 void AliVZEROv4::CreateMaterials()
 646 {
 647
 648 // Creates materials used for geometry
 649
 650     AliDebug(2,"VZERO create materials");
 651
 652 /*
 653     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,
 654                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 655
 656
 657     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,
 658                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 659
 660     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 661                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 662                                  1.662295, 1.68337 };
 663
 664     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 665                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 666
 667     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 668
 669
 670     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 671
 672
 673     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,
 674                                1e-4,1e-4,1e-4,1e-4 };
 675     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 676
 677 */
 678
 679     Int_t *idtmed = fIdtmed->GetArray()-2999;
 680
 681
 682 //  Parameters related to Quarz (SiO2) :
 683
 684     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 685     Int_t nlmatqua;
 686
 687     aqua[0]    = 28.09;
 688     aqua[1]    = 16.;
 689     zqua[0]    = 14.;
 690     zqua[1]    = 8.;
 691     densqua    = 2.64;
 692     nlmatqua   = -2;
 693     wmatqua[0] = 1.;
 694     wmatqua[1] = 2.;
 695
 696 // Parameters  related to aluminum sheets :
 697
 698     Float_t  aal   = 26.98;
 699     Float_t  zal   = 13.00;
 700     Float_t  densal=   2.7;
 701     Float_t  radlal=   8.9;
 702
 703 // Parameters  related to scintillator CH :
 704
 705     Float_t ascin[2] = {1.00794,12.011};
 706     Float_t zscin[2] = {1.,6.};
 707     Float_t wscin[2] = {1.,1.};
 708     Float_t denscin  = 1.032;
 709
 710 // AIR
 711
 712     Float_t aAir[4]={12.,14.,16.,36.};
 713     Float_t zAir[4]={6.,7.,8.,18.};
 714     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 715     Float_t dAir = 1.20479E-3;
 716
 717 //  Definition of materials :
 718
 719 // AIR
 720
 721     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 722     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 723     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 724     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 725     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 726     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 727
 728     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 729
 730
 731     Int_t   iSXFLD = gAlice->Field()->Integ();
 732     Float_t sXMGMX = gAlice->Field()->Max();
 733
 734     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 735
 736     tmaxfd = 10.;
 737     stemax = 0.1;
 738     deemax = 0.1;
 739     epsil  = 0.001;
 740     stmin  = 0.001;
 741
 742 //  Active Air :
 743     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 744               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 745
 746 //  Inactive air :
 747
 748     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 749               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 750
 751     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 752               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 753
 754     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 755               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 756
 757     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 758               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 759
 760
 761     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 762               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 763
 764     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 765
 766     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 767     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 768     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 769     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 770
 771     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 772     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 773     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 774     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 775
 776     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 777     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 778     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 779     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 780     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 781     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 782
 783     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 784     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 785     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 786     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 787
 788     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 789     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 790     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 791     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 792     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 793     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 794
 795     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 796     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 797     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 798     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 799     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 800     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 801
 802
 803 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 804 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 805
 806 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 807 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 808
 809 }
 810
 811 //_____________________________________________________________________________
 812 void AliVZEROv4::DrawModule() const
 813 {
 814
 815 //  Drawing is done in DrawVZERO.C
 816
 817    AliDebug(2,"VZERO DrawModule");
 818 }
 819
 820 //_____________________________________________________________________________
 821 void AliVZEROv4::Init()
 822 {
 823 // Initialises version 2 of the VZERO Detector
 824 // Just prints an information message
 825
 826   AliDebug(2,Form("VZERO version %d initialized",IsVersion()));
 827
 828 //   gMC->SetMaxStep(fMaxStepAlu);
 829 //   gMC->SetMaxStep(fMaxStepQua);
 830
 831     AliVZERO::Init();
 832 }
 833
 834 //_____________________________________________________________________________
 835 void AliVZEROv4::StepManager()
 836 {
 837
 838 // Step Manager, called at each step
 839
 840      Int_t     copy;
 841      static    Int_t   vol[4];
 842      static    Float_t hits[21];
 843      static    Float_t eloss, tlength;
 844      static    Int_t   nPhotonsInStep;
 845      static    Int_t   nPhotons;
 846      static    Int_t   numStep;
 847      Float_t   ringNumber;
 848      Float_t   destep, step;
 849
 850      numStep += 1;
 851
 852 //   We keep only charged tracks :
 853
 854      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 855
 856      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 857      vol[2]    = gMC->CurrentVolID(copy);
 858      vol[3]    = copy;
 859
 860      static Int_t idV0R1 = gMC->VolId("V0R1");
 861      static Int_t idV0L1 = gMC->VolId("V0L1");
 862      static Int_t idV0R2 = gMC->VolId("V0R2");
 863      static Int_t idV0L2 = gMC->VolId("V0L2");
 864      static Int_t idV0R3 = gMC->VolId("V0R3");
 865      static Int_t idV0L3 = gMC->VolId("V0L3");
 866      static Int_t idV0R4 = gMC->VolId("V0R4");
 867      static Int_t idV0L4 = gMC->VolId("V0L4");
 868
 869      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 870                gMC->CurrentVolID(copy) == idV0L1 )
 871                ringNumber = 1.0;
 872      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 873                gMC->CurrentVolID(copy) == idV0L2 )
 874                ringNumber = 2.0;
 875      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 876                gMC->CurrentVolID(copy) == idV0L3 )
 877                ringNumber = 3.0;
 878      else if ( gMC->CurrentVolID(copy) == idV0R4 ||
 879                gMC->CurrentVolID(copy) == idV0L4 )
 880                ringNumber = 4.0;
 881      else
 882                ringNumber = 0.0;
 883
 884      if  (  ringNumber > 0.5  ) {
 885
 886         destep    = gMC->Edep();
 887         step      = gMC->TrackStep();
 888
 889         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 890         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 891
 892         eloss    += destep;
 893         tlength  += step;
 894
 895         if  ( gMC->IsTrackEntering()  )  {
 896
 897             nPhotons  =  nPhotonsInStep;
 898             gMC->TrackPosition(fTrackPosition);
 899             gMC->TrackMomentum(fTrackMomentum);
 900
 901             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 902                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 903
 904             hits[0]  = fTrackPosition.X();
 905             hits[1]  = fTrackPosition.Y();
 906             hits[2]  = fTrackPosition.Z();
 907             hits[3]  = Float_t (gMC->TrackPid());
 908
 909             hits[4]  = gMC->TrackTime();
 910             hits[5]  = gMC->TrackCharge();
 911             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 912             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 913             hits[8]  = ringNumber;
 914
 915             hits[9]  = pt;
 916             hits[10] = fTrackMomentum.P();
 917             hits[11] = fTrackMomentum.Px();
 918             hits[12] = fTrackMomentum.Py();
 919             hits[13] = fTrackMomentum.Pz();
 920
 921             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 922             hits[14] = par->Vx();
 923             hits[15] = par->Vy();
 924             hits[16] = par->Vz();
 925
 926             tlength  = 0.0;
 927             eloss    = 0.0;
 928          }
 929
 930          nPhotons  = nPhotons + nPhotonsInStep;
 931
 932          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 933
 934          nPhotons  = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
 935          nPhotons  = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
 936
 937          hits[17] =   eloss;
 938          hits[18] = tlength;
 939          hits[19] = nPhotons;
 940          hits[20] = GetCellId (vol, hits);
 941
 942          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 943
 944          tlength         = 0.0;
 945          eloss           = 0.0;
 946          nPhotons        =   0;
 947          nPhotonsInStep  =   0;
 948
 949          numStep         =   0;
 950          }
 951     }
 952
 953 }
 954
 955 //_____________________________________________________________________________
 956 void AliVZEROv4::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 957 {
 958
 959 //  Adds a VZERO hit
 960
 961   TClonesArray &lhits = *fHits;
 962   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 963 }
 964
 965 //_____________________________________________________________________________
 966 void AliVZEROv4::AddDigits(Int_t *tracks, Int_t* digits)
 967 {
 968
 969 //  Adds a VZERO digit
 970
 971    TClonesArray  &ldigits = *fDigits;
 972    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 973 }
 974
 975 //_____________________________________________________________________________
 976 void AliVZEROv4::MakeBranch(Option_t *option)
 977 {
 978
 979 // Creates new branches in the current Root Tree
 980
 981   char branchname[10];
 982   sprintf(branchname,"%s",GetName());
 983   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
 984
 985   const char *cH = strstr(option,"H");
 986
 987   if (fHits   && TreeH() && cH) {
 988     TreeH()->Branch(branchname,&fHits, fBufferSize);
 989     AliDebug(2,Form("Making Branch %s for hits",branchname));
 990   }
 991
 992   const char *cD = strstr(option,"D");
 993
 994   if (fDigits   && fLoader->TreeD() && cD) {
 995     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 996     AliDebug(2,Form("Making Branch %s for digits",branchname));
 997   }
 998
 999 }
1000
1001 //_____________________________________________________________________________
1002 Int_t AliVZEROv4::GetCellId(Int_t *vol, Float_t *hits)
1003 {
1004
1005   //   Returns Id of scintillator cell
1006   //   Right side from  0 to 47
1007   //   Left  side from 48 to 95
1008
1009    Int_t index = vol[1];
1010    fCellId     = 0;
1011
1012    if (index < 10) index = index + 12;
1013
1014    if (hits[2] < 0.0) {
1015       index = (index - 10) + ( ( Int_t(hits[8]) - 1 ) * 12);
1016       fCellId   = index;
1017    }
1018    else if (hits[2] > 0.0)
1019    {
1020       index = (index + 38) + ( ( Int_t(hits[8]) - 1 ) * 12);
1021       fCellId   = index;}
1022
1023    return fCellId;
1024 }