VZERO/AliVZEROv3.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 //////////////////////////////////////////////////////////////////////
  19 //                                                                  //
  20 //  (V-zero) detector  version 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 "AliRun.h"
  54 #include "AliMC.h"
  55 #include "AliConst.h"
  56 #include "AliMagF.h"
  57 #include "AliVZEROLoader.h"
  58 #include "AliVZEROdigit.h"
  59 #include "AliVZEROhit.h"
  60 #include "AliVZEROv3.h"
  61
  62 ClassImp(AliVZEROv3)
  63
  64 //_____________________________________________________________________________
  65 AliVZEROv3:: AliVZEROv3():AliVZERO()
  66 {
  67 // Standard default constructor
  68 }
  69
  70 //_____________________________________________________________________________
  71 AliVZEROv3::AliVZEROv3(const char *name, const char *title):
  72  AliVZERO(name,title)
  73 {
  74
  75 // Standard constructor for V-zero Detector  version 2
  76
  77   Int_t i;
  78
  79   printf("\n");
  80   for(i=0;i<26;i++) printf("*");
  81   printf(" Create VZERO object ");
  82   for(i=0;i<26;i++) printf("*");
  83   printf("\n");
  84
  85   fLightYield              =  93.75;
  86   fLightAttenuation        =   0.05;
  87   fnMeters                 =   15.0;
  88   fFibToPhot               =    0.3;
  89
  90 }
  91
  92 //_____________________________________________________________________________
  93 void AliVZEROv3::CreateGeometry()
  94 {
  95
  96 // Creates the GEANT geometry of the V-zero Detector  version 3
  97
  98   Int_t i;
  99
 100   printf("\n");
 101   for(i=0;i<26;i++) printf("*");
 102   printf(" Create VZERO Geometry ");
 103   for(i=0;i<26;i++) printf("*");
 104   printf("\n");
 105
 106   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 107
 108   Int_t    ndetR = 1;
 109   Int_t    ndetL = 1;
 110
 111   Int_t    ncellsR = 1;
 112   Int_t    ncellsL = 1;
 113
 114   Int_t    idrotm[999];
 115
 116   Float_t  height1Right, height2Right, height3Right;
 117   Float_t  heightRight;
 118   Float_t  theta;
 119
 120   Float_t  halfThickQua;
 121
 122   Float_t  zdet;
 123   Float_t  r0Right, r3Right;
 124   Float_t  pi = TMath::Pi();
 125
 126   height1Right    =     1.82 + 3.81;  // height of cell 1, in cm
 127   height2Right    =     4.72 + 7.12;  // height of cell 2, in cm
 128   height3Right    =           10.83;  // height of cell 3, in cm
 129
 130   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 131
 132   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 133
 134 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 135 // absorber nose sitting at 90 cm. Will use -zdet later...
 136 // size of V0R box  (fThickness) is increased by 1 mm as compared to version v2
 137
 138   fThickness  =    fThickness + 0.1;
 139   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 140   r0Right     =    4.05;          // closest distance to center of the beam pipe
 141   heightRight =    height1Right + height2Right + height3Right;
 142   r3Right     =    r0Right + heightRight;
 143
 144 // Creation of mother volume v0LE - left part - :
 145 // Entrance face at  +350.0 cm  (new coordinate system) ...
 146
 147    Float_t   partube[3];
 148
 149    partube[0] =  4.3;
 150    partube[1] = 45.0;
 151    partube[2] = fThickness1/2.0;
 152
 153    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 154
 155 // Creation of five rings - left part - :
 156 // Entrance face at +350.0 cm  (new coordinate system) ...
 157
 158 // Mother volume v0L0 in which will be set 5 scintillator cells
 159
 160   Float_t   partubs[5];
 161
 162   Float_t   r0Left      =   4.3;
 163   Float_t   height1Left =   2.6 +  4.1;  // previous ring 1 + ring 2
 164   Float_t   height2Left =   6.4 + 10.2;  // previous ring 3 + ring 4
 165   Float_t   height3Left =  16.9;
 166   Float_t   heightLeft  =   height1Left + height2Left + height3Left;
 167
 168   Float_t   r3Left      =   r0Left  + heightLeft;
 169
 170   partubs[0]     =  r0Left;
 171   partubs[1]     =  r3Left;
 172   partubs[2]     =  fThickness1/2.0;
 173   partubs[3]     =  90.0-15.0;
 174   partubs[4]     = 120.0-15.0;
 175
 176   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 177
 178   Float_t  r1Left =  r0Left + height1Left;
 179
 180   partubs[0]     =  r0Left;
 181   partubs[1]     =  r1Left;
 182
 183   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 184   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 185
 186   Float_t  r2Left  =  r1Left + height2Left;
 187
 188   partubs[0]     =  r1Left;
 189   partubs[1]     =  r2Left;
 190
 191   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 192   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 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
 201 // Creation of mother volume v0RI - right part - :
 202
 203   partube[0] = r0Right - 0.2;
 204   partube[1] = r3Right + 1.0;
 205   partube[2] = fThickness/2.0;
 206
 207   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 208
 209 // Creation of  carbon lids (3.5 mm thick) to keep v0RI box shut...
 210
 211   Float_t  lidThickness = 0.35;
 212
 213   partube[0] =   r0Right;
 214   partube[1] =   r3Right;
 215   partube[2] =   +lidThickness/2.0;
 216
 217   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 218   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 219   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 220
 221 // Creation of aluminum rings to maintain the v0RI pieces ...
 222
 223   partube[0] =   r0Right - 0.2;
 224   partube[1] =   r0Right;
 225   partube[2] =   +fThickness/2.0;
 226
 227   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 228   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 229
 230   partube[0] =   r3Right;
 231   partube[1] =   r3Right + 1.0;
 232   partube[2] =   +fThickness/2.0;
 233
 234   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 235   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 236
 237 // Mother volume v0R0 in which will be set 3  scintillator cells
 238
 239   partubs[0]      =  r0Right;
 240   partubs[1]      =  r3Right;
 241   partubs[2]      =  fThickness/2.0;
 242   partubs[3]      =  90.0-15.0;
 243   partubs[4]      = 120.0-15.0;
 244
 245   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 246
 247 // Elementary cell of ring 1 :
 248 // (cells of ring 1  will be shifted by 1.7 cm towards vertex to output fibers)
 249
 250   Float_t   offsetFibers  =  1.7;
 251   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 252   Float_t   r1Right       =  r0Right + height1Right;
 253
 254   partubs[0]     =  r0Right;
 255   partubs[1]     =  r1Right;
 256   partubs[2]     =  fThickness1/2.0;
 257
 258   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 259   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 260
 261 // Elementary cell of ring 2 :
 262
 263   Float_t   r2Right   =  r1Right + height2Right;
 264
 265   partubs[0]     =  r1Right;
 266   partubs[1]     =  r2Right;
 267
 268   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 269   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 270
 271
 272 // Elementary cell of ring 3 :
 273
 274   partubs[0]     =  r2Right;
 275   partubs[1]     =  r3Right;
 276
 277   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 278   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 279
 280
 281   Float_t  phiDeg = 180./6.;
 282
 283 // Right part :
 284
 285   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 286       {
 287         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 288         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 289                           0.0,0.0,idrotm[902],"ONLY");
 290         ndetR++;
 291        }
 292
 293   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 294
 295   ncellsR = (ndetR - 1) * 3;
 296   printf("    Number of cells on Right side =   %d\n",  ncellsR);
 297
 298 // Left part :
 299
 300   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 301       {
 302         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 303         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 304                           0.0,0.0,idrotm[902],"ONLY");
 305         ndetL++;
 306        }
 307
 308   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 309
 310   ncellsL = (ndetL - 1) * 3;
 311   printf("    Number of cells on Left side  =   %d\n",  ncellsL);
 312   for(i=0;i<75;i++) printf("*");
 313   printf("\n");
 314
 315 }
 316
 317 //_____________________________________________________________________________
 318 void AliVZEROv3::BuildGeometry()
 319 {
 320
 321 // Builds simple ROOT TNode geometry for event display
 322
 323   Int_t i;
 324
 325   printf("\n");
 326   for(i=0;i<30;i++) printf("*");
 327   printf(" VZERO BuildGeometry ");
 328   for(i=0;i<30;i++) printf("*");
 329   printf("\n");
 330
 331   TNode *top;
 332
 333   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 334   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3;
 335   TNode *v0Lnode, *v0Lnode0;
 336   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3;
 337
 338   const int kColorVZERO  = kGreen;
 339
 340   top = gAlice->GetGeometry()->GetNode("alice");
 341
 342   Float_t  height1Right, height2Right, height3Right;
 343   Float_t  heightRight;
 344   Float_t  theta;
 345
 346   Float_t  halfThickQua;
 347   Float_t  zdet;
 348   Float_t  r0Right, r3Right;
 349   Float_t  pi = TMath::Pi();
 350
 351   height1Right      =     1.82 + 3.81;       // height of cell 1, in cm
 352   height2Right      =     4.72 + 7.12;       // height of cell 2, in cm
 353   height3Right      =           10.83;       // height of cell 3, in cm
 354
 355   theta             =    pi/6.0/2.0;
 356
 357   halfThickQua      =    fThickness1/2.0;
 358
 359   zdet              =    90.0 - 0.6 - fThickness/2.0;
 360   r0Right                =    4.05;
 361   heightRight            =    height1Right + height2Right + height3Right;
 362   r3Right                =    r0Right + heightRight;
 363
 364   Int_t     ndiv    =     1;
 365
 366   Float_t   partube[3];
 367
 368   partube[0] =  r0Right - 0.2;
 369   partube[1] =  r3Right + 1.0;
 370   partube[2] = fThickness/2.0;
 371
 372   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 373
 374   top->cd();
 375
 376   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 377
 378   v0Rnode->SetLineColor(kYellow);
 379   fNodes->Add(v0Rnode);
 380   v0Rnode->SetVisibility(2);
 381
 382 // Rondelles de carbone (epaisseur 3.5 mm) de maintien des cellules ...
 383
 384   Float_t  lidThickness = 0.35;
 385
 386   partube[0] =   r0Right;
 387   partube[1] =   r3Right;
 388   partube[2] =   +lidThickness/2.0;
 389
 390   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 391
 392   v0Rnode->cd();
 393   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 394   v0Rnode6->SetLineColor(kYellow);
 395   fNodes->Add(v0Rnode6);
 396   v0Rnode->cd();
 397   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 398   v0Rnode7->SetLineColor(kYellow);
 399   fNodes->Add(v0Rnode7);
 400
 401   partube[0] =   r0Right - 0.2;
 402   partube[1] =   r0Right;
 403   partube[2] =   +fThickness/2.0;
 404
 405   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 406
 407   v0Rnode->cd();
 408   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 409   v0Rnode8->SetLineColor(kYellow);
 410   fNodes->Add(v0Rnode8);
 411
 412   partube[0] =   r3Right;
 413   partube[1] =   r3Right + 1.0;
 414   partube[2] =   +fThickness/2.0;
 415
 416   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 417
 418   v0Rnode->cd();
 419   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 420   v0Rnode9->SetLineColor(kYellow);
 421   fNodes->Add(v0Rnode9);
 422
 423   Float_t   partubs[5];
 424
 425   partubs[0]      =  r0Right;
 426   partubs[1]      =  r3Right;
 427   partubs[2]      =  fThickness/2.0;
 428   partubs[3]      =  90.0-15.0;
 429   partubs[4]      = 120.0-15.0;
 430
 431   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 432                                                   partubs[3], partubs[4]);
 433
 434   v0R0->SetNumberOfDivisions(ndiv);
 435
 436   Float_t   r1Right =  r0Right + height1Right;
 437   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 438   Float_t   offsetFibers = 1.7;
 439
 440   partubs[0]     =  r0Right;
 441   partubs[1]     =  r1Right;
 442   partubs[2]     =  fThickness1/2.0;
 443
 444   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 445                                                   partubs[3], partubs[4]);
 446
 447   v0R1->SetNumberOfDivisions(ndiv);
 448
 449   Float_t   r2Right   =  r1Right + height2Right;
 450
 451   partubs[0]     =  r1Right;
 452   partubs[1]     =  r2Right;
 453
 454   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 455                                                   partubs[3], partubs[4]);
 456
 457   v0R2->SetNumberOfDivisions(ndiv);
 458
 459   partubs[0]     =  r2Right;
 460   partubs[1]     =  r3Right;
 461
 462   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 463                                                   partubs[3], partubs[4]);
 464   v0R3->SetNumberOfDivisions(ndiv);
 465
 466   Float_t  phi;
 467   Float_t  phiDeg= 180./6.;
 468
 469   Int_t    ndetR = 1;
 470
 471   char     nameNode[12];
 472
 473   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 474
 475   {
 476
 477     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 478
 479     sprintf(nameNode,"SUBDER%d",ndetR);
 480
 481     v0Rnode->cd();
 482     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 483     v0Rnode0->SetLineColor(kYellow);
 484     fNodes->Add(v0Rnode0);
 485     ndetR++;
 486
 487     sprintf(nameNode,"SUBDER%d",ndetR);
 488     v0Rnode0->cd();
 489     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset+ offsetFibers ,0);
 490     v0Rnode1->SetLineColor(kColorVZERO);
 491     fNodes->Add(v0Rnode1);
 492     ndetR++;
 493
 494     sprintf(nameNode,"SUBDER%d",ndetR);
 495     v0Rnode0->cd();
 496     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset,0);
 497     v0Rnode2->SetLineColor(kColorVZERO);
 498     fNodes->Add(v0Rnode2);
 499     ndetR++;
 500
 501     sprintf(nameNode,"SUBDER%d",ndetR);
 502     v0Rnode0->cd();
 503     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset,0);
 504     v0Rnode3->SetLineColor(kColorVZERO);
 505     fNodes->Add(v0Rnode3);
 506     ndetR++;
 507
 508     v0Rnode0->SetVisibility(2);
 509
 510   }
 511
 512 // Left side of VZERO :
 513
 514   Float_t   r0Left      =   4.3;
 515   Float_t   height1Left =   2.6 +  4.1;
 516   Float_t   height2Left =   6.4 + 10.2;
 517   Float_t   height3Left =   16.9;
 518   Float_t   heightLeft  = height1Left + height2Left + height3Left;
 519
 520   Float_t   r3Left      = r0Left  + heightLeft;
 521
 522   partube[0] =  r0Left;
 523   partube[1] =  r3Left;
 524   partube[2] =  fThickness1/2.0;
 525
 526   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 527
 528   top->cd();
 529
 530   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 531
 532   v0Lnode->SetLineColor(kBlue);
 533   fNodes->Add(v0Lnode);
 534
 535   v0Lnode->SetVisibility(2);
 536
 537   partubs[0]      =  r0Left;
 538   partubs[1]      =  r3Left;
 539   partubs[2]      =  fThickness1/2.0;
 540   partubs[3]      =  90.0-15.0;
 541   partubs[4]      = 120.0-15.0;
 542
 543   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 544                                                   partubs[3], partubs[4]);
 545
 546   v0L0->SetNumberOfDivisions(ndiv);
 547   v0L0->SetLineColor(7);
 548
 549   Float_t   offsetLeft;
 550   offsetLeft    = - fThickness1/2.0;
 551
 552   Float_t   r1Left =  r0Left + height1Left;
 553
 554   partubs[0]     =  r0Left;
 555   partubs[1]     =  r1Left;
 556
 557   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 558                                                   partubs[3], partubs[4]);
 559   v0L1->SetNumberOfDivisions(ndiv);
 560
 561   Float_t   r2Left =  r1Left + height2Left;
 562
 563   partubs[0]     =  r1Left;
 564   partubs[1]     =  r2Left;
 565
 566   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 567                                                   partubs[3], partubs[4]);
 568   v0L2->SetNumberOfDivisions(ndiv);
 569
 570   partubs[0]     =  r2Left;
 571   partubs[1]     =  r3Left;
 572
 573   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 574                                                   partubs[3], partubs[4]);
 575   v0L3->SetNumberOfDivisions(ndiv);
 576
 577   Int_t    ndetL   = 1;
 578
 579   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 580
 581   {
 582
 583     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 584
 585
 586     sprintf(nameNode,"SUBDEL%d",ndetL);
 587
 588     v0Lnode->cd();
 589     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 590     v0Lnode0->SetLineColor(kColorVZERO);
 591     fNodes->Add(v0Lnode0);
 592     ndetL++;
 593
 594     sprintf(nameNode,"SUBDEL%d",ndetL);
 595     v0Lnode0->cd();
 596     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 597     v0Lnode1->SetLineColor(kColorVZERO);
 598     fNodes->Add(v0Lnode1);
 599     ndetL++;
 600
 601     sprintf(nameNode,"SUBDEL%d",ndetL);
 602     v0Lnode0->cd();
 603     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 604     v0Lnode2->SetLineColor(kColorVZERO);
 605     fNodes->Add(v0Lnode2);
 606     ndetL++;
 607
 608     sprintf(nameNode,"SUBDEL%d",ndetL);
 609     v0Lnode0->cd();
 610     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 611     v0Lnode3->SetLineColor(kColorVZERO);
 612     fNodes->Add(v0Lnode3);
 613     ndetL++;
 614
 615     v0Lnode0->SetVisibility(2);
 616
 617   }
 618
 619 }
 620
 621 //_____________________________________________________________________________
 622 void AliVZEROv3::CreateMaterials()
 623 {
 624
 625 // Creates materials used for geometry
 626
 627     Int_t i;
 628
 629     printf("\n");
 630     for(i=0;i<25;i++) printf("*");
 631     printf(" VZERO create materials ");
 632     for(i=0;i<26;i++) printf("*");
 633     printf("\n");
 634
 635 /*
 636     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,
 637                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 638
 639
 640     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,
 641                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 642
 643     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 644                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 645                                  1.662295, 1.68337 };
 646
 647     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 648                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 649
 650     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 651
 652
 653     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 654
 655
 656     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,
 657                                1e-4,1e-4,1e-4,1e-4 };
 658     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 659
 660 */
 661
 662     Int_t *idtmed = fIdtmed->GetArray()-2999;
 663
 664
 665 //  Parameters related to Quarz (SiO2) :
 666
 667     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 668     Int_t nlmatqua;
 669
 670     aqua[0]    = 28.09;
 671     aqua[1]    = 16.;
 672     zqua[0]    = 14.;
 673     zqua[1]    = 8.;
 674     densqua    = 2.64;
 675     nlmatqua   = -2;
 676     wmatqua[0] = 1.;
 677     wmatqua[1] = 2.;
 678
 679 // Parameters  related to aluminum sheets :
 680
 681     Float_t  aal   = 26.98;
 682     Float_t  zal   = 13.00;
 683     Float_t  densal=   2.7;
 684     Float_t  radlal=   8.9;
 685
 686 // Parameters  related to scintillator CH :
 687
 688     Float_t ascin[2] = {1.00794,12.011};
 689     Float_t zscin[2] = {1.,6.};
 690     Float_t wscin[2] = {1.,1.};
 691     Float_t denscin  = 1.032;
 692
 693 // AIR
 694
 695     Float_t aAir[4]={12.,14.,16.,36.};
 696     Float_t zAir[4]={6.,7.,8.,18.};
 697     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 698     Float_t dAir = 1.20479E-3;
 699
 700 //  Definition of materials :
 701
 702 // AIR
 703
 704     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 705     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 706     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 707     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 708     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 709     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 710
 711     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 712
 713
 714     Int_t   iSXFLD = gAlice->Field()->Integ();
 715     Float_t sXMGMX = gAlice->Field()->Max();
 716
 717     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 718
 719     tmaxfd = 10.;
 720     stemax = 0.1;
 721     deemax = 0.1;
 722     epsil  = 0.001;
 723     stmin  = 0.001;
 724
 725 //  Active Air :
 726     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 727               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 728
 729 //  Inactive air :
 730
 731     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 732               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 733
 734     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 735               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 736
 737     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 738               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 739
 740     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 741               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 742
 743
 744     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 745               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 746
 747     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 748
 749     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 750     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 751     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 752     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 753
 754     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 755     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 756     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 757     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 758
 759     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 760     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 761     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 762     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 763     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 764     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 765
 766     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 767     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 768     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 769     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 770
 771     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 772     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 773     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 774     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 775     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 776     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 777
 778     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 779     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 780     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 781     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 782     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 783     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 784
 785
 786 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 787 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 788
 789 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 790 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 791
 792 }
 793
 794 //_____________________________________________________________________________
 795 void AliVZEROv3::DrawModule()
 796 {
 797
 798 //  Drawing is done in DrawVZERO.C
 799
 800    Int_t i;
 801
 802    printf("\n");
 803    for(i=0;i<30;i++) printf("*");
 804    printf(" VZERO DrawModule ");
 805    for(i=0;i<30;i++) printf("*");
 806    printf("\n");
 807
 808
 809 }
 810
 811 //_____________________________________________________________________________
 812 void AliVZEROv3::Init()
 813 {
 814 // Initialises version 2 of the VZERO Detector
 815 // Just prints an information message
 816
 817    printf(" VZERO version %d initialized \n",IsVersion());
 818
 819 //   gMC->SetMaxStep(fMaxStepAlu);
 820 //   gMC->SetMaxStep(fMaxStepQua);
 821
 822     AliVZERO::Init();
 823
 824 }
 825
 826
 827 //_____________________________________________________________________________
 828 void AliVZEROv3::StepManager()
 829 {
 830
 831 // Step Manager, called at each step
 832
 833      Int_t     copy;
 834      static    Int_t   vol[4];
 835      static    Float_t hits[21];
 836      static    Float_t eloss, tlength;
 837      static    Int_t   nPhotonsInStep;
 838      static    Int_t   nPhotons;
 839      static    Int_t   numStep;
 840      Float_t   ringNumber;
 841      Float_t   destep, step;
 842
 843      numStep += 1;
 844
 845 //   We keep only charged tracks :
 846
 847      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 848
 849      static Int_t idV0R1 = gMC->VolId("V0R1");
 850      static Int_t idV0L1 = gMC->VolId("V0L1");
 851      static Int_t idV0R2 = gMC->VolId("V0R2");
 852      static Int_t idV0L2 = gMC->VolId("V0L2");
 853      static Int_t idV0R3 = gMC->VolId("V0R3");
 854      static Int_t idV0L3 = gMC->VolId("V0L3");
 855
 856      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 857      vol[2]    = gMC->CurrentVolID(copy);
 858      vol[3]    = copy;
 859
 860      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 861                gMC->CurrentVolID(copy) == idV0L1 )
 862                ringNumber = 1.0;
 863      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 864                gMC->CurrentVolID(copy) == idV0L2 )
 865                ringNumber = 2.0;
 866      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 867                gMC->CurrentVolID(copy) == idV0L3 )
 868                ringNumber = 3.0;
 869      else
 870                ringNumber = 0.0;
 871
 872      if  (  ringNumber > 0.5  ) {
 873
 874         destep    = gMC->Edep();
 875         step      = gMC->TrackStep();
 876
 877         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 878         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 879
 880         eloss    += destep;
 881         tlength  += step;
 882
 883         if  ( gMC->IsTrackEntering()  )  {
 884
 885             nPhotons  =  nPhotonsInStep;
 886             gMC->TrackPosition(fTrackPosition);
 887             gMC->TrackMomentum(fTrackMomentum);
 888
 889             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 890                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 891
 892             hits[0]  = fTrackPosition.X();
 893             hits[1]  = fTrackPosition.Y();
 894             hits[2]  = fTrackPosition.Z();
 895             hits[3]  = Float_t (gMC->TrackPid());
 896
 897             hits[4]  = gMC->TrackTime();
 898             hits[5]  = gMC->TrackCharge();
 899             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 900             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 901             hits[8]  = ringNumber;
 902
 903             hits[9]  = pt;
 904             hits[10] = fTrackMomentum.P();
 905             hits[11] = fTrackMomentum.Px();
 906             hits[12] = fTrackMomentum.Py();
 907             hits[13] = fTrackMomentum.Pz();
 908
 909             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 910             hits[14] = par->Vx();
 911             hits[15] = par->Vy();
 912             hits[16] = par->Vz();
 913
 914             tlength  = 0.0;
 915             eloss    = 0.0;
 916
 917          }
 918
 919          nPhotons  = nPhotons + nPhotonsInStep;
 920
 921          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 922
 923          nPhotons  = nPhotons - Int_t( (Float_t(nPhotons) * fLightAttenuation * fnMeters) );
 924          nPhotons  = nPhotons - Int_t(  Float_t(nPhotons) * fFibToPhot );
 925
 926          hits[17] =   eloss;
 927          hits[18] = tlength;
 928          hits[19] = nPhotons;
 929          hits[20] = GetCellId (vol, hits);
 930
 931          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 932
 933          tlength         = 0.0;
 934          eloss           = 0.0;
 935          nPhotons        =   0;
 936          nPhotonsInStep  =   0;
 937
 938          numStep         =   0;
 939          }
 940     }
 941
 942 }
 943
 944 //_____________________________________________________________________________
 945 void AliVZEROv3::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 946 {
 947
 948 //  Adds a VZERO hit
 949
 950   TClonesArray &lhits = *fHits;
 951   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 952 }
 953
 954 //_____________________________________________________________________________
 955 void AliVZEROv3::AddDigits(Int_t *tracks, Int_t* digits)
 956 {
 957
 958 //  Adds a VZERO digit
 959
 960    TClonesArray  &ldigits = *fDigits;
 961    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 962 }
 963
 964 //_____________________________________________________________________________
 965 void AliVZEROv3::MakeBranch(Option_t *option)
 966 {
 967
 968 // Creates new branches in the current Root Tree
 969
 970   char branchname[10];
 971   sprintf(branchname,"%s",GetName());
 972   printf(" fBufferSize = %d \n",fBufferSize);
 973
 974   const char *cH = strstr(option,"H");
 975
 976   if (fHits   && TreeH() && cH) {
 977     TreeH()->Branch(branchname,&fHits, fBufferSize);
 978     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
 979   }
 980
 981   const char *cD = strstr(option,"D");
 982
 983   if (fDigits   && fLoader->TreeD() && cD) {
 984     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 985     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
 986   }
 987
 988 }
 989
 990 //_____________________________________________________________________________
 991 Int_t AliVZEROv3::GetCellId(Int_t *vol, Float_t *hits)
 992 {
 993
 994   //   Returns Id of scintillator cell
 995   //   Right side from  0 to 35
 996   //   Left  side from 36 to 71
 997
 998    Int_t index = vol[1];
 999    fCellId     = 0;
1000
1001    if (index < 10) index = index + 12;
1002
1003    if (hits[2] < 0.0) {
1004       index = (index - 10) + ( ( Int_t(hits[8]) - 1 ) * 12);
1005       fCellId   = index;
1006    }
1007    else if (hits[2] > 0.0)
1008    {
1009       index = (index  + 26) + ( ( Int_t(hits[8]) - 1 ) * 12);
1010       fCellId   = index;}
1011
1012    return fCellId;
1013 }