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 <TGeant3.h>
  43 #include <TGeometry.h>
  44 #include <TLorentzVector.h>
  45 #include <TMath.h>
  46 #include <TNode.h>
  47 #include <TObjectTable.h>
  48 #include <TTUBE.h>
  49 #include <TTUBS.h>
  50 #include <TVirtualMC.h>
  51 #include <TParticle.h>
  52
  53 // --- AliRoot header files ---
  54 #include "AliRun.h"
  55 #include "AliMC.h"
  56 #include "AliConst.h"
  57 #include "AliMagF.h"
  58 #include "AliVZEROLoader.h"
  59 #include "AliVZEROdigit.h"
  60 #include "AliVZEROhit.h"
  61 #include "AliVZEROv3.h"
  62 #include "AliVZEROConst.h"
  63
  64 ClassImp(AliVZEROv3)
  65
  66 //_____________________________________________________________________________
  67 AliVZEROv3:: AliVZEROv3():AliVZERO()
  68 {
  69 // Standard default constructor
  70 }
  71
  72 //_____________________________________________________________________________
  73 AliVZEROv3::AliVZEROv3(const char *name, const char *title):
  74  AliVZERO(name,title)
  75 {
  76
  77 // Standard constructor for V-zero Detector  version 2
  78
  79   Int_t i;
  80
  81   printf("\n");
  82   for(i=0;i<26;i++) printf("*");
  83   printf(" Create VZERO object ");
  84   for(i=0;i<26;i++) printf("*");
  85   printf("\n");
  86
  87   fLightYield              =  93.75;
  88   fLightAttenuation        =   0.05;
  89   fnMeters                 =   15.0;
  90   fFibToPhot               =    0.3;
  91
  92 }
  93
  94 //_____________________________________________________________________________
  95 void AliVZEROv3::CreateGeometry()
  96 {
  97
  98 // Creates the GEANT geometry of the V-zero Detector  version 3
  99
 100   Int_t i;
 101
 102   printf("\n");
 103   for(i=0;i<26;i++) printf("*");
 104   printf(" Create VZERO Geometry ");
 105   for(i=0;i<26;i++) printf("*");
 106   printf("\n");
 107
 108   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 109
 110   Int_t    ndetR = 1;
 111   Int_t    ndetL = 1;
 112
 113   Int_t    ncellsR = 1;
 114   Int_t    ncellsL = 1;
 115
 116   Int_t    idrotm[999];
 117
 118   Float_t  height1Right, height2Right, height3Right;
 119   Float_t  heightRight;
 120   Float_t  theta;
 121
 122   Float_t  halfThickQua;
 123
 124   Float_t  zdet;
 125   Float_t  r0Right, r3Right;
 126   Float_t  pi = TMath::Pi();
 127
 128   height1Right    =     1.82 + 3.81;  // height of cell 1, in cm
 129   height2Right    =     4.72 + 7.12;  // height of cell 2, in cm
 130   height3Right    =           10.83;  // height of cell 3, in cm
 131
 132   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 133
 134   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 135
 136 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 137 // absorber nose sitting at 90 cm. Will use -zdet later...
 138 // size of V0R box  (fThickness) is increased by 1 mm as compared to version v2
 139
 140   fThickness  =    fThickness + 0.1;
 141   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 142   r0Right     =    4.05;          // closest distance to center of the beam pipe
 143   heightRight =    height1Right + height2Right + height3Right;
 144   r3Right     =    r0Right + heightRight;
 145
 146 // Creation of mother volume v0LE - left part - :
 147 // Entrance face at  +350.0 cm  (new coordinate system) ...
 148
 149    Float_t   partube[3];
 150
 151    partube[0] =  4.3;
 152    partube[1] = 45.0;
 153    partube[2] = fThickness1/2.0;
 154
 155    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 156
 157 // Creation of five rings - left part - :
 158 // Entrance face at +350.0 cm  (new coordinate system) ...
 159
 160 // Mother volume v0L0 in which will be set 5 scintillator cells
 161
 162   Float_t   partubs[5];
 163
 164   Float_t   r0Left      =   4.3;
 165   Float_t   height1Left =   2.6 +  4.1;  // previous ring 1 + ring 2
 166   Float_t   height2Left =   6.4 + 10.2;  // previous ring 3 + ring 4
 167   Float_t   height3Left =  16.9;
 168   Float_t   heightLeft  =   height1Left + height2Left + height3Left;
 169
 170   Float_t   r3Left      =   r0Left  + heightLeft;
 171
 172   partubs[0]     =  r0Left;
 173   partubs[1]     =  r3Left;
 174   partubs[2]     =  fThickness1/2.0;
 175   partubs[3]     =  90.0-15.0;
 176   partubs[4]     = 120.0-15.0;
 177
 178   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 179
 180   Float_t  r1Left =  r0Left + height1Left;
 181
 182   partubs[0]     =  r0Left;
 183   partubs[1]     =  r1Left;
 184
 185   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 186   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 187
 188   Float_t  r2Left  =  r1Left + height2Left;
 189
 190   partubs[0]     =  r1Left;
 191   partubs[1]     =  r2Left;
 192
 193   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 194   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 195
 196   partubs[0]     =  r2Left;
 197   partubs[1]     =  r3Left;
 198
 199   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 200   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 201
 202
 203 // Creation of mother volume v0RI - right part - :
 204
 205   partube[0] = r0Right - 0.2;
 206   partube[1] = r3Right + 1.0;
 207   partube[2] = fThickness/2.0;
 208
 209   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 210
 211 // Creation of  carbon lids (3.5 mm thick) to keep v0RI box shut...
 212
 213   Float_t  lidThickness = 0.35;
 214
 215   partube[0] =   r0Right;
 216   partube[1] =   r3Right;
 217   partube[2] =   +lidThickness/2.0;
 218
 219   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 220   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 221   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 222
 223 // Creation of aluminum rings to maintain the v0RI pieces ...
 224
 225   partube[0] =   r0Right - 0.2;
 226   partube[1] =   r0Right;
 227   partube[2] =   +fThickness/2.0;
 228
 229   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 230   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 231
 232   partube[0] =   r3Right;
 233   partube[1] =   r3Right + 1.0;
 234   partube[2] =   +fThickness/2.0;
 235
 236   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 237   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 238
 239 // Mother volume v0R0 in which will be set 3  scintillator cells
 240
 241   partubs[0]      =  r0Right;
 242   partubs[1]      =  r3Right;
 243   partubs[2]      =  fThickness/2.0;
 244   partubs[3]      =  90.0-15.0;
 245   partubs[4]      = 120.0-15.0;
 246
 247   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 248
 249 // Elementary cell of ring 1 :
 250 // (cells of ring 1  will be shifted by 1.7 cm towards vertex to output fibers)
 251
 252   Float_t   offsetFibers  =  1.7;
 253   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 254   Float_t   r1Right       =  r0Right + height1Right;
 255
 256   partubs[0]     =  r0Right;
 257   partubs[1]     =  r1Right;
 258   partubs[2]     =  fThickness1/2.0;
 259
 260   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 261   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 262
 263 // Elementary cell of ring 2 :
 264
 265   Float_t   r2Right   =  r1Right + height2Right;
 266
 267   partubs[0]     =  r1Right;
 268   partubs[1]     =  r2Right;
 269
 270   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 271   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 272
 273
 274 // Elementary cell of ring 3 :
 275
 276   partubs[0]     =  r2Right;
 277   partubs[1]     =  r3Right;
 278
 279   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 280   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 281
 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) * 3;
 298   printf("    Number of cells on Right side =   %d\n",  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) * 3;
 313   printf("    Number of cells on Left side  =   %d\n",  ncellsL);
 314   for(i=0;i<75;i++) printf("*");
 315   printf("\n");
 316
 317 }
 318
 319 //_____________________________________________________________________________
 320 void AliVZEROv3::BuildGeometry()
 321 {
 322
 323 // Builds simple ROOT TNode geometry for event display
 324
 325   Int_t i;
 326
 327   printf("\n");
 328   for(i=0;i<30;i++) printf("*");
 329   printf(" VZERO BuildGeometry ");
 330   for(i=0;i<30;i++) printf("*");
 331   printf("\n");
 332
 333   TNode *top;
 334
 335   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 336   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3;
 337   TNode *v0Lnode, *v0Lnode0;
 338   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3;
 339
 340   const int kColorVZERO  = kGreen;
 341
 342   top = gAlice->GetGeometry()->GetNode("alice");
 343
 344   Float_t  height1Right, height2Right, height3Right;
 345   Float_t  heightRight;
 346   Float_t  theta;
 347
 348   Float_t  halfThickQua;
 349   Float_t  zdet;
 350   Float_t  r0Right, r3Right;
 351   Float_t  pi = TMath::Pi();
 352
 353   height1Right      =     1.82 + 3.81;       // height of cell 1, in cm
 354   height2Right      =     4.72 + 7.12;       // height of cell 2, in cm
 355   height3Right      =           10.83;       // height of cell 3, in cm
 356
 357   theta             =    pi/6.0/2.0;
 358
 359   halfThickQua      =    fThickness1/2.0;
 360
 361   zdet              =    90.0 - 0.6 - fThickness/2.0;
 362   r0Right                =    4.05;
 363   heightRight            =    height1Right + height2Right + height3Right;
 364   r3Right                =    r0Right + heightRight;
 365
 366   Int_t     ndiv    =     1;
 367
 368   Float_t   partube[3];
 369
 370   partube[0] =  r0Right - 0.2;
 371   partube[1] =  r3Right + 1.0;
 372   partube[2] = fThickness/2.0;
 373
 374   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 375
 376   top->cd();
 377
 378   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 379
 380   v0Rnode->SetLineColor(kYellow);
 381   fNodes->Add(v0Rnode);
 382   v0Rnode->SetVisibility(2);
 383
 384 // Rondelles de carbone (epaisseur 3.5 mm) de maintien des cellules ...
 385
 386   Float_t  lidThickness = 0.35;
 387
 388   partube[0] =   r0Right;
 389   partube[1] =   r3Right;
 390   partube[2] =   +lidThickness/2.0;
 391
 392   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 393
 394   v0Rnode->cd();
 395   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 396   v0Rnode6->SetLineColor(kYellow);
 397   fNodes->Add(v0Rnode6);
 398   v0Rnode->cd();
 399   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 400   v0Rnode7->SetLineColor(kYellow);
 401   fNodes->Add(v0Rnode7);
 402
 403   partube[0] =   r0Right - 0.2;
 404   partube[1] =   r0Right;
 405   partube[2] =   +fThickness/2.0;
 406
 407   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 408
 409   v0Rnode->cd();
 410   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 411   v0Rnode8->SetLineColor(kYellow);
 412   fNodes->Add(v0Rnode8);
 413
 414   partube[0] =   r3Right;
 415   partube[1] =   r3Right + 1.0;
 416   partube[2] =   +fThickness/2.0;
 417
 418   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 419
 420   v0Rnode->cd();
 421   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 422   v0Rnode9->SetLineColor(kYellow);
 423   fNodes->Add(v0Rnode9);
 424
 425   Float_t   partubs[5];
 426
 427   partubs[0]      =  r0Right;
 428   partubs[1]      =  r3Right;
 429   partubs[2]      =  fThickness/2.0;
 430   partubs[3]      =  90.0-15.0;
 431   partubs[4]      = 120.0-15.0;
 432
 433   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 434                                                   partubs[3], partubs[4]);
 435
 436   v0R0->SetNumberOfDivisions(ndiv);
 437
 438   Float_t   r1Right =  r0Right + height1Right;
 439   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 440   Float_t   offsetFibers = 1.7;
 441
 442   partubs[0]     =  r0Right;
 443   partubs[1]     =  r1Right;
 444   partubs[2]     =  fThickness1/2.0;
 445
 446   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 447                                                   partubs[3], partubs[4]);
 448
 449   v0R1->SetNumberOfDivisions(ndiv);
 450
 451   Float_t   r2Right   =  r1Right + height2Right;
 452
 453   partubs[0]     =  r1Right;
 454   partubs[1]     =  r2Right;
 455
 456   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 457                                                   partubs[3], partubs[4]);
 458
 459   v0R2->SetNumberOfDivisions(ndiv);
 460
 461   partubs[0]     =  r2Right;
 462   partubs[1]     =  r3Right;
 463
 464   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 465                                                   partubs[3], partubs[4]);
 466   v0R3->SetNumberOfDivisions(ndiv);
 467
 468   Float_t  phi;
 469   Float_t  phiDeg= 180./6.;
 470
 471   Int_t    ndetR = 1;
 472
 473   char     nameNode[12];
 474
 475   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 476
 477   {
 478
 479     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 480
 481     sprintf(nameNode,"SUBDER%d",ndetR);
 482
 483     v0Rnode->cd();
 484     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 485     v0Rnode0->SetLineColor(kYellow);
 486     fNodes->Add(v0Rnode0);
 487     ndetR++;
 488
 489     sprintf(nameNode,"SUBDER%d",ndetR);
 490     v0Rnode0->cd();
 491     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset+ offsetFibers ,0);
 492     v0Rnode1->SetLineColor(kColorVZERO);
 493     fNodes->Add(v0Rnode1);
 494     ndetR++;
 495
 496     sprintf(nameNode,"SUBDER%d",ndetR);
 497     v0Rnode0->cd();
 498     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset,0);
 499     v0Rnode2->SetLineColor(kColorVZERO);
 500     fNodes->Add(v0Rnode2);
 501     ndetR++;
 502
 503     sprintf(nameNode,"SUBDER%d",ndetR);
 504     v0Rnode0->cd();
 505     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset,0);
 506     v0Rnode3->SetLineColor(kColorVZERO);
 507     fNodes->Add(v0Rnode3);
 508     ndetR++;
 509
 510     v0Rnode0->SetVisibility(2);
 511
 512   }
 513
 514 // Left side of VZERO :
 515
 516   Float_t   r0Left      =   4.3;
 517   Float_t   height1Left =   2.6 +  4.1;
 518   Float_t   height2Left =   6.4 + 10.2;
 519   Float_t   height3Left =   16.9;
 520   Float_t   heightLeft  = height1Left + height2Left + height3Left;
 521
 522   Float_t   r3Left      = r0Left  + heightLeft;
 523
 524   partube[0] =  r0Left;
 525   partube[1] =  r3Left;
 526   partube[2] =  fThickness1/2.0;
 527
 528   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 529
 530   top->cd();
 531
 532   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 533
 534   v0Lnode->SetLineColor(kBlue);
 535   fNodes->Add(v0Lnode);
 536
 537   v0Lnode->SetVisibility(2);
 538
 539   partubs[0]      =  r0Left;
 540   partubs[1]      =  r3Left;
 541   partubs[2]      =  fThickness1/2.0;
 542   partubs[3]      =  90.0-15.0;
 543   partubs[4]      = 120.0-15.0;
 544
 545   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 546                                                   partubs[3], partubs[4]);
 547
 548   v0L0->SetNumberOfDivisions(ndiv);
 549   v0L0->SetLineColor(7);
 550
 551   Float_t   offsetLeft;
 552   offsetLeft    = - fThickness1/2.0;
 553
 554   Float_t   r1Left =  r0Left + height1Left;
 555
 556   partubs[0]     =  r0Left;
 557   partubs[1]     =  r1Left;
 558
 559   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 560                                                   partubs[3], partubs[4]);
 561   v0L1->SetNumberOfDivisions(ndiv);
 562
 563   Float_t   r2Left =  r1Left + height2Left;
 564
 565   partubs[0]     =  r1Left;
 566   partubs[1]     =  r2Left;
 567
 568   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 569                                                   partubs[3], partubs[4]);
 570   v0L2->SetNumberOfDivisions(ndiv);
 571
 572   partubs[0]     =  r2Left;
 573   partubs[1]     =  r3Left;
 574
 575   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 576                                                   partubs[3], partubs[4]);
 577   v0L3->SetNumberOfDivisions(ndiv);
 578
 579   Int_t    ndetL   = 1;
 580
 581   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 582
 583   {
 584
 585     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 586
 587
 588     sprintf(nameNode,"SUBDEL%d",ndetL);
 589
 590     v0Lnode->cd();
 591     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 592     v0Lnode0->SetLineColor(kColorVZERO);
 593     fNodes->Add(v0Lnode0);
 594     ndetL++;
 595
 596     sprintf(nameNode,"SUBDEL%d",ndetL);
 597     v0Lnode0->cd();
 598     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 599     v0Lnode1->SetLineColor(kColorVZERO);
 600     fNodes->Add(v0Lnode1);
 601     ndetL++;
 602
 603     sprintf(nameNode,"SUBDEL%d",ndetL);
 604     v0Lnode0->cd();
 605     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 606     v0Lnode2->SetLineColor(kColorVZERO);
 607     fNodes->Add(v0Lnode2);
 608     ndetL++;
 609
 610     sprintf(nameNode,"SUBDEL%d",ndetL);
 611     v0Lnode0->cd();
 612     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 613     v0Lnode3->SetLineColor(kColorVZERO);
 614     fNodes->Add(v0Lnode3);
 615     ndetL++;
 616
 617     v0Lnode0->SetVisibility(2);
 618
 619   }
 620
 621 }
 622
 623 //_____________________________________________________________________________
 624 void AliVZEROv3::CreateMaterials()
 625 {
 626
 627 // Creates materials used for geometry
 628
 629     Int_t i;
 630
 631     printf("\n");
 632     for(i=0;i<25;i++) printf("*");
 633     printf(" VZERO create materials ");
 634     for(i=0;i<26;i++) printf("*");
 635     printf("\n");
 636
 637 /*
 638     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,
 639                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 640
 641
 642     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,
 643                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 644
 645     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 646                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 647                                  1.662295, 1.68337 };
 648
 649     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 650                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 651
 652     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 653
 654
 655     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 656
 657
 658     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,
 659                                1e-4,1e-4,1e-4,1e-4 };
 660     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 661
 662 */
 663
 664     Int_t *idtmed = fIdtmed->GetArray()-2999;
 665
 666 //    TGeant3 *geant3 = (TGeant3*) gMC;
 667
 668 //  Parameters related to Quarz (SiO2) :
 669
 670     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 671     Int_t nlmatqua;
 672
 673     aqua[0]    = 28.09;
 674     aqua[1]    = 16.;
 675     zqua[0]    = 14.;
 676     zqua[1]    = 8.;
 677     densqua    = 2.64;
 678     nlmatqua   = -2;
 679     wmatqua[0] = 1.;
 680     wmatqua[1] = 2.;
 681
 682 // Parameters  related to aluminum sheets :
 683
 684     Float_t  aal   = 26.98;
 685     Float_t  zal   = 13.00;
 686     Float_t  densal=   2.7;
 687     Float_t  radlal=   8.9;
 688
 689 // Parameters  related to scintillator CH :
 690
 691     Float_t ascin[2] = {1.00794,12.011};
 692     Float_t zscin[2] = {1.,6.};
 693     Float_t wscin[2] = {1.,1.};
 694     Float_t denscin  = 1.032;
 695
 696 //  Definition of materials :
 697
 698     AliMaterial( 1, "AIR A$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
 699     AliMaterial(11, "AIR I$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
 700     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 701     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 702     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 703     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 704
 705     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 706
 707
 708     Int_t   iSXFLD = gAlice->Field()->Integ();
 709     Float_t sXMGMX = gAlice->Field()->Max();
 710
 711     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 712
 713     tmaxfd = 10.;
 714     stemax = 0.1;
 715     deemax = 0.1;
 716     epsil  = 0.001;
 717     stmin  = 0.001;
 718
 719 //  Active Air :
 720     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 721               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 722
 723 //  Inactive air :
 724
 725     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 726               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 727
 728     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 729               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 730
 731     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 732               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 733
 734     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 735               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 736
 737
 738     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 739               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 740
 741     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 742
 743     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 744     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 745     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 746     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 747
 748     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 749     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 750     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 751     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 752
 753     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 754     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 755     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 756     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 757     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 758     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 759
 760     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 761     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 762     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 763     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 764
 765     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 766     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 767     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 768     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 769     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 770     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 771
 772     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 773     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 774     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 775     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 776     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 777     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 778
 779
 780 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 781 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 782
 783 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 784 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 785
 786 }
 787
 788 //_____________________________________________________________________________
 789 void AliVZEROv3::DrawModule()
 790 {
 791
 792 //  Drawing is done in DrawVZERO.C
 793
 794    Int_t i;
 795
 796    printf("\n");
 797    for(i=0;i<30;i++) printf("*");
 798    printf(" VZERO DrawModule ");
 799    for(i=0;i<30;i++) printf("*");
 800    printf("\n");
 801
 802
 803 }
 804
 805 //_____________________________________________________________________________
 806 void AliVZEROv3::Init()
 807 {
 808 // Initialises version 2 of the VZERO Detector
 809 // Just prints an information message
 810
 811    printf(" VZERO version %d initialized \n",IsVersion());
 812
 813 //   gMC->SetMaxStep(fMaxStepAlu);
 814 //   gMC->SetMaxStep(fMaxStepQua);
 815
 816     AliVZERO::Init();
 817
 818 }
 819
 820
 821 //_____________________________________________________________________________
 822 void AliVZEROv3::StepManager()
 823 {
 824
 825 // Step Manager, called at each step
 826
 827      Int_t     copy;
 828      static    Int_t   vol[4];
 829      static    Float_t hits[21];
 830      static    Float_t eloss, tlength;
 831      static    Int_t   tracks[2];
 832      static    Int_t   nPhotonsInStep;
 833      static    Int_t   nPhotons;
 834      static    Int_t   numStep;
 835      Float_t   ringNumber;
 836      Float_t   destep, step;
 837
 838      numStep += 1;
 839
 840 //   We keep only charged tracks :
 841
 842      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 843
 844      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 845      vol[2]    = gMC->CurrentVolID(copy);
 846      vol[3]    = copy;
 847
 848      if      ( gMC->CurrentVolID(copy) == gMC->VolId("V0R1") ||
 849                gMC->CurrentVolID(copy) == gMC->VolId("V0L1") )
 850                ringNumber = 1.0;
 851      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R2") ||
 852                gMC->CurrentVolID(copy) == gMC->VolId("V0L2") )
 853                ringNumber = 2.0;
 854      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R3") ||
 855                gMC->CurrentVolID(copy) == gMC->VolId("V0L3") )
 856                ringNumber = 3.0;
 857      else
 858                ringNumber = 0.0;
 859
 860      if  (  ringNumber > 0.5  ) {
 861
 862         destep    = gMC->Edep();
 863         step      = gMC->TrackStep();
 864
 865         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 866         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 867
 868         eloss    += destep;
 869         tlength  += step;
 870
 871         if  ( gMC->IsTrackEntering()  )  {
 872
 873             nPhotons  =  nPhotonsInStep;
 874             gMC->TrackPosition(fTrackPosition);
 875             gMC->TrackMomentum(fTrackMomentum);
 876
 877             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 878                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 879
 880             hits[0]  = fTrackPosition.X();
 881             hits[1]  = fTrackPosition.Y();
 882             hits[2]  = fTrackPosition.Z();
 883             hits[3]  = Float_t (gMC->TrackPid());
 884
 885             hits[4]  = gMC->TrackTime();
 886             hits[5]  = gMC->TrackCharge();
 887             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 888             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 889             hits[8]  = ringNumber;
 890
 891             hits[9]  = pt;
 892             hits[10] = fTrackMomentum.P();
 893             hits[11] = fTrackMomentum.Px();
 894             hits[12] = fTrackMomentum.Py();
 895             hits[13] = fTrackMomentum.Pz();
 896
 897             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 898             hits[14] = par->Vx();
 899             hits[15] = par->Vy();
 900             hits[16] = par->Vz();
 901
 902             tlength  = 0.0;
 903             eloss    = 0.0;
 904
 905          }
 906
 907          nPhotons  = nPhotons + nPhotonsInStep;
 908
 909          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 910
 911          nPhotons  = nPhotons - Int_t( (Float_t(nPhotons) * fLightAttenuation * fnMeters) );
 912          nPhotons  = nPhotons - Int_t(  Float_t(nPhotons) * fFibToPhot );
 913
 914          hits[17] =   eloss;
 915          hits[18] = tlength;
 916          hits[19] = nPhotons;
 917          hits[20] = GetCellId (vol, hits);
 918
 919          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 920
 921          tlength         = 0.0;
 922          eloss           = 0.0;
 923          nPhotons        =   0;
 924          nPhotonsInStep  =   0;
 925
 926          numStep         =   0;
 927          }
 928     }
 929
 930 }
 931
 932 //_____________________________________________________________________________
 933 void AliVZEROv3::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 934 {
 935
 936 //  Adds a VZERO hit
 937
 938   TClonesArray &lhits = *fHits;
 939   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 940 }
 941
 942 //_____________________________________________________________________________
 943 void AliVZEROv3::AddDigits(Int_t *tracks, Int_t* digits)
 944 {
 945
 946 //  Adds a VZERO digit
 947
 948    TClonesArray  &ldigits = *fDigits;
 949    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 950 }
 951
 952 //_____________________________________________________________________________
 953 void AliVZEROv3::MakeBranch(Option_t *option)
 954 {
 955
 956 // Creates new branches in the current Root Tree
 957
 958   char branchname[10];
 959   sprintf(branchname,"%s",GetName());
 960   printf(" fBufferSize = %d \n",fBufferSize);
 961
 962   const char *cH = strstr(option,"H");
 963
 964   if (fHits   && TreeH() && cH) {
 965     TreeH()->Branch(branchname,&fHits, fBufferSize);
 966     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
 967   }
 968
 969   const char *cD = strstr(option,"D");
 970
 971   if (fDigits   && fLoader->TreeD() && cD) {
 972     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 973     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
 974   }
 975
 976 }
 977
 978 //_____________________________________________________________________________
 979 Int_t AliVZEROv3::GetCellId(Int_t *vol, Float_t *hits)
 980 {
 981
 982   //   Returns Id of scintillator cell
 983   //   Right side from  0 to 35
 984   //   Left  side from 36 to 71
 985
 986    Int_t index = vol[1];
 987    fCellId     = 0;
 988
 989    if (index < 10) index = index + 12;
 990
 991    if (hits[2] < 0.0) {
 992       index = (index - 10) + ( ( Int_t(hits[8]) - 1 ) * 12);
 993       fCellId   = index;
 994    }
 995    else if (hits[2] > 0.0)
 996    {
 997       index = (index  + 26) + ( ( Int_t(hits[8]) - 1 ) * 12);
 998       fCellId   = index;}
 999
1000    return fCellId;
1001 }