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   *
   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 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 <TGeant3.h>
  39 #include <TGeometry.h>
  40 #include <TLorentzVector.h>
  41 #include <TMath.h>
  42 #include <TNode.h>
  43 #include <TObjectTable.h>
  44 #include <TTUBE.h>
  45 #include <TTUBS.h>
  46 #include <TVirtualMC.h>
  47 #include <TParticle.h>
  48
  49 // --- AliRoot header files ---
  50 #include "AliRun.h"
  51 #include "AliMC.h"
  52 #include "AliConst.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   Int_t i;
  75
  76   printf("\n");
  77   for(i=0;i<26;i++) printf("*");
  78   printf(" Create VZERO object ");
  79   for(i=0;i<26;i++) printf("*");
  80   printf("\n");
  81
  82   fLightYield              =  93.75; // Light yield in BC408 (93.75 eV per photon)
  83   fLightAttenuation        =   0.05; // Light attenuation in fiber (0.05 per meter)
  84   fnMeters                 =   15.0; // Number of meters of clear fibers to PM
  85   fFibToPhot               =    0.3; // Attenuation at fiber-photocathode interface
  86 }
  87
  88 //_____________________________________________________________________________
  89 void AliVZEROv4::CreateGeometry()
  90 {
  91
  92 // Creates the GEANT geometry of the V-zero Detector  version 3
  93
  94   Int_t i;
  95
  96   printf("\n");
  97   for(i=0;i<26;i++) printf("*");
  98   printf(" Create VZERO Geometry ");
  99   for(i=0;i<26;i++) printf("*");
 100   printf("\n");
 101
 102   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 103
 104   Int_t    ndetR = 1;
 105   Int_t    ndetL = 1;
 106
 107   Int_t    ncellsR = 1;
 108   Int_t    ncellsL = 1;
 109
 110   Int_t    idrotm[999];
 111
 112   Float_t  height1Right, height2Right, height3Right, height4Right;
 113   Float_t  heightRight;
 114   Float_t  theta;
 115
 116   Float_t  halfThickQua;
 117
 118   Float_t  zdet;
 119   Float_t  r0Right, r4Right;
 120   Float_t  pi = TMath::Pi();
 121
 122   height1Right    =     3.42;  // height of cell 1, in cm
 123   height2Right    =     6.78;  // height of cell 2, in cm
 124   height3Right    =     7.11;  // height of cell 3, in cm
 125   height4Right    =    10.91;  // height of cell 4, in cm
 126
 127   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 128
 129   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 130
 131 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 132 // absorber nose sitting at 90 cm. Will use -zdet later...
 133 // size of V0R box  (fThickness) is increased by 1 mm as compared to version v2
 134
 135   fThickness  =    fThickness + 0.1;
 136   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 137   r0Right     =    4.05;          // closest distance to center of the beam pipe
 138   heightRight =    height1Right + height2Right + height3Right + height4Right;
 139   r4Right     =    r0Right + heightRight;
 140
 141 // Creation of mother volume v0LE - left part - :
 142 // Entrance face at  +350.0 cm  (new coordinate system) ...
 143
 144    Float_t   partube[3];
 145
 146    partube[0] =  4.3;
 147    partube[1] = 45.0;
 148    partube[2] = fThickness1/2.0;
 149
 150    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 151
 152 // Creation of five rings - left part - :
 153 // Entrance face at +350.0 cm  (new coordinate system) ...
 154
 155 // Mother volume v0L0 in which will be set 5 scintillator cells
 156
 157   Float_t   partubs[5];
 158
 159   Float_t   r0Left      =   4.3;
 160   Float_t   height1Left =   3.6;
 161   Float_t   height2Left =   6.4;
 162   Float_t   height3Left =  14.9;
 163   Float_t   height4Left =  14.4;
 164   Float_t   heightLeft  =   height1Left + height2Left + height3Left + height4Left;
 165
 166   Float_t   r4Left      =   r0Left  + heightLeft;
 167
 168   partubs[0]     =  r0Left;
 169   partubs[1]     =  r4Left;
 170   partubs[2]     =  fThickness1/2.0;
 171   partubs[3]     =  90.0-15.0;
 172   partubs[4]     = 120.0-15.0;
 173
 174   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 175
 176   Float_t  r1Left =  r0Left + height1Left;
 177
 178   partubs[0]     =  r0Left;
 179   partubs[1]     =  r1Left;
 180
 181   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 182   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 183
 184   Float_t  r2Left  =  r1Left + height2Left;
 185
 186   partubs[0]     =  r1Left;
 187   partubs[1]     =  r2Left;
 188
 189   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 190   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 191
 192   Float_t  r3Left  =  r2Left + height3Left;
 193
 194   partubs[0]     =  r2Left;
 195   partubs[1]     =  r3Left;
 196
 197   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 198   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 199
 200   partubs[0]     =  r3Left;
 201   partubs[1]     =  r4Left;
 202
 203   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 204   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 205
 206 // Creation of mother volume v0RI - right part - :
 207
 208   partube[0] = r0Right - 0.2;
 209   partube[1] = r4Right + 1.0;
 210   partube[2] = fThickness/2.0;
 211
 212   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 213
 214 // Creation of  carbon lids (3.5 mm thick) to keep v0RI box shut...
 215
 216   Float_t  lidThickness = 0.35;
 217
 218   partube[0] =   r0Right;
 219   partube[1] =   r4Right;
 220   partube[2] =   +lidThickness/2.0;
 221
 222   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 223   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 224   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 225
 226 // Creation of aluminum rings to maintain the v0RI pieces ...
 227
 228   partube[0] =   r0Right - 0.2;
 229   partube[1] =   r0Right;
 230   partube[2] =   +fThickness/2.0;
 231
 232   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 233   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 234
 235   partube[0] =   r4Right;
 236   partube[1] =   r4Right + 1.0;
 237   partube[2] =   +fThickness/2.0;
 238
 239   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 240   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 241
 242 // Mother volume v0R0 in which will be set 4  scintillator cells
 243
 244   partubs[0]      =  r0Right;
 245   partubs[1]      =  r4Right;
 246   partubs[2]      =  fThickness/2.0;
 247   partubs[3]      =  90.0-15.0;
 248   partubs[4]      = 120.0-15.0;
 249
 250   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 251
 252 // Elementary cell of ring 1 :
 253 // (cells of ring 1  will be shifted by 1.7 cm towards vertex to output fibers)
 254
 255   Float_t   offsetFibers  =  1.7;
 256   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 257   Float_t   r1Right       =  r0Right + height1Right;
 258
 259   partubs[0]     =  r0Right;
 260   partubs[1]     =  r1Right;
 261   partubs[2]     =  fThickness1/2.0;
 262
 263   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 264   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 265
 266 // Elementary cell of ring 2 :
 267
 268   Float_t   r2Right   =  r1Right + height2Right;
 269
 270   partubs[0]     =  r1Right;
 271   partubs[1]     =  r2Right;
 272
 273   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 274   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 275
 276
 277 // Elementary cell of ring 3 :
 278
 279   Float_t   r3Right   =  r2Right + height3Right;
 280
 281   partubs[0]     =  r2Right;
 282   partubs[1]     =  r3Right;
 283
 284   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 285   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 286
 287 // Elementary cell of ring 4 :
 288
 289   partubs[0]     =  r3Right;
 290   partubs[1]     =  r4Right;
 291
 292   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 293   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 294
 295   Float_t  phiDeg = 180./6.;
 296
 297 // Right part :
 298
 299   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 300       {
 301         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 302         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 303                           0.0,0.0,idrotm[902],"ONLY");
 304         ndetR++;
 305        }
 306
 307   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 308
 309   ncellsR = (ndetR - 1) * 4;
 310   printf("    Number of cells on Right side =   %d\n",  ncellsR);
 311
 312 // Left part :
 313
 314   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 315       {
 316         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 317         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 318                           0.0,0.0,idrotm[902],"ONLY");
 319         ndetL++;
 320        }
 321
 322   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 323
 324   ncellsL = (ndetL - 1) * 4;
 325   printf("    Number of cells on Left side  =   %d\n",  ncellsL);
 326   for(i=0;i<75;i++) printf("*");
 327   printf("\n");
 328
 329 }
 330
 331 //_____________________________________________________________________________
 332 void AliVZEROv4::BuildGeometry()
 333 {
 334
 335 // Builds simple ROOT TNode geometry for event display
 336
 337   Int_t i;
 338
 339   printf("\n");
 340   for(i=0;i<30;i++) printf("*");
 341   printf(" VZERO BuildGeometry ");
 342   for(i=0;i<30;i++) printf("*");
 343   printf("\n");
 344
 345   TNode *top;
 346
 347   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 348   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3, *v0Rnode4;
 349   TNode *v0Lnode, *v0Lnode0;
 350   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3, *v0Lnode4;
 351
 352   const int kColorVZERO  = kGreen;
 353
 354   top = gAlice->GetGeometry()->GetNode("alice");
 355
 356   Float_t  height1Right, height2Right, height3Right, height4Right;
 357   Float_t  heightRight;
 358   Float_t  theta;
 359
 360   Float_t  halfThickQua;
 361   Float_t  zdet;
 362   Float_t  r0Right, r4Right;
 363   Float_t  pi = TMath::Pi();
 364
 365   height1Right      =     3.42;  // height of cell 1, in cm
 366   height2Right      =     6.78;  // height of cell 2, in cm
 367   height3Right      =     7.11;  // height of cell 3, in cm
 368   height4Right      =    10.91;  // height of cell 4, in cm
 369
 370   theta             =    pi/6.0/2.0;
 371
 372   halfThickQua      =    fThickness1/2.0;
 373
 374   zdet              =    90.0 - 0.6 - fThickness/2.0;
 375   r0Right           =    4.05;
 376   heightRight       =    height1Right + height2Right + height3Right + height4Right;
 377   r4Right           =    r0Right + heightRight;
 378
 379   Int_t     ndiv    =     1;
 380
 381   Float_t   partube[3];
 382
 383   partube[0] =  r0Right - 0.2;
 384   partube[1] =  r4Right + 1.0;
 385   partube[2] = fThickness/2.0;
 386
 387   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 388
 389   top->cd();
 390
 391   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 392
 393   v0Rnode->SetLineColor(kYellow);
 394   fNodes->Add(v0Rnode);
 395   v0Rnode->SetVisibility(2);
 396
 397 // Rondelles de carbone (epaisseur 3.5 mm) de maintien des cellules ...
 398
 399   Float_t  lidThickness = 0.35;
 400
 401   partube[0] =   r0Right;
 402   partube[1] =   r4Right;
 403   partube[2] =   +lidThickness/2.0;
 404
 405   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 406
 407   v0Rnode->cd();
 408   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 409   v0Rnode6->SetLineColor(kYellow);
 410   fNodes->Add(v0Rnode6);
 411   v0Rnode->cd();
 412   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 413   v0Rnode7->SetLineColor(kYellow);
 414   fNodes->Add(v0Rnode7);
 415
 416   partube[0] =   r0Right - 0.2;
 417   partube[1] =   r0Right;
 418   partube[2] =   +fThickness/2.0;
 419
 420   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 421
 422   v0Rnode->cd();
 423   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 424   v0Rnode8->SetLineColor(kYellow);
 425   fNodes->Add(v0Rnode8);
 426
 427   partube[0] =   r4Right;
 428   partube[1] =   r4Right + 1.0;
 429   partube[2] =   +fThickness/2.0;
 430
 431   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 432
 433   v0Rnode->cd();
 434   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 435   v0Rnode9->SetLineColor(kYellow);
 436   fNodes->Add(v0Rnode9);
 437
 438   Float_t   partubs[5];
 439
 440   partubs[0]      =  r0Right;
 441   partubs[1]      =  r4Right;
 442   partubs[2]      =  fThickness/2.0;
 443   partubs[3]      =  90.0-15.0;
 444   partubs[4]      = 120.0-15.0;
 445
 446   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 447                                                   partubs[3], partubs[4]);
 448
 449   v0R0->SetNumberOfDivisions(ndiv);
 450
 451   Float_t   r1Right =  r0Right + height1Right;
 452   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 453   Float_t   offsetFibers = 1.7;
 454
 455   partubs[0]     =  r0Right;
 456   partubs[1]     =  r1Right;
 457   partubs[2]     =  fThickness1/2.0;
 458
 459   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 460                                                   partubs[3], partubs[4]);
 461
 462   v0R1->SetNumberOfDivisions(ndiv);
 463
 464   Float_t   r2Right  =  r1Right + height2Right;
 465
 466   partubs[0]     =  r1Right;
 467   partubs[1]     =  r2Right;
 468
 469   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 470                                                   partubs[3], partubs[4]);
 471
 472   v0R2->SetNumberOfDivisions(ndiv);
 473
 474   Float_t   r3Right  =  r2Right + height3Right;
 475
 476   partubs[0]     =  r2Right;
 477   partubs[1]     =  r3Right;
 478
 479   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 480                                                   partubs[3], partubs[4]);
 481   v0R3->SetNumberOfDivisions(ndiv);
 482
 483   partubs[0]     =  r3Right;
 484   partubs[1]     =  r4Right;
 485
 486   TTUBS *v0R4 = new TTUBS("V0R4", "V0R4", "void", partubs[0], partubs[1], partubs[2],
 487                                                   partubs[3], partubs[4]);
 488   v0R4->SetNumberOfDivisions(ndiv);
 489
 490   Float_t  phi;
 491   Float_t  phiDeg= 180./6.;
 492
 493   Int_t    ndetR = 1;
 494
 495   char     nameNode[12];
 496
 497   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 498
 499   {
 500     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 501
 502     sprintf(nameNode,"SUBDER%d",ndetR);
 503
 504     v0Rnode->cd();
 505     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 506     v0Rnode0->SetLineColor(kYellow);
 507     fNodes->Add(v0Rnode0);
 508     ndetR++;
 509
 510     sprintf(nameNode,"SUBDER%d",ndetR);
 511     v0Rnode0->cd();
 512     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset+ offsetFibers ,0);
 513     v0Rnode1->SetLineColor(kColorVZERO);
 514     fNodes->Add(v0Rnode1);
 515     ndetR++;
 516
 517     sprintf(nameNode,"SUBDER%d",ndetR);
 518     v0Rnode0->cd();
 519     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset,0);
 520     v0Rnode2->SetLineColor(kColorVZERO);
 521     fNodes->Add(v0Rnode2);
 522     ndetR++;
 523
 524     sprintf(nameNode,"SUBDER%d",ndetR);
 525     v0Rnode0->cd();
 526     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset,0);
 527     v0Rnode3->SetLineColor(kColorVZERO);
 528     fNodes->Add(v0Rnode3);
 529     ndetR++;
 530
 531     sprintf(nameNode,"SUBDER%d",ndetR);
 532     v0Rnode0->cd();
 533     v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset,0);
 534     v0Rnode4->SetLineColor(kColorVZERO);
 535     fNodes->Add(v0Rnode4);
 536     ndetR++;
 537
 538     v0Rnode0->SetVisibility(2);
 539   }
 540
 541 // Left side of VZERO :
 542
 543   Float_t   r0Left      =    4.3;
 544   Float_t   height1Left =    3.6;
 545   Float_t   height2Left =    6.4;
 546   Float_t   height3Left =   14.9;
 547   Float_t   height4Left =   14.4;
 548   Float_t   heightLeft  = height1Left + height2Left + height3Left + height4Left;
 549
 550   Float_t   r4Left      = r0Left  + heightLeft;
 551
 552   partube[0] =  r0Left;
 553   partube[1] =  r4Left;
 554   partube[2] =  fThickness1/2.0;
 555
 556   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 557
 558   top->cd();
 559
 560   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 561
 562   v0Lnode->SetLineColor(kBlue);
 563   fNodes->Add(v0Lnode);
 564
 565   v0Lnode->SetVisibility(2);
 566
 567   partubs[0]      =  r0Left;
 568   partubs[1]      =  r4Left;
 569   partubs[2]      =  fThickness1/2.0;
 570   partubs[3]      =  90.0-15.0;
 571   partubs[4]      = 120.0-15.0;
 572
 573   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 574                                                   partubs[3], partubs[4]);
 575
 576   v0L0->SetNumberOfDivisions(ndiv);
 577   v0L0->SetLineColor(7);
 578
 579   Float_t   offsetLeft;
 580   offsetLeft    = - fThickness1/2.0;
 581
 582   Float_t   r1Left =  r0Left + height1Left;
 583
 584   partubs[0]     =  r0Left;
 585   partubs[1]     =  r1Left;
 586
 587   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 588                                                   partubs[3], partubs[4]);
 589   v0L1->SetNumberOfDivisions(ndiv);
 590
 591   Float_t   r2Left =  r1Left + height2Left;
 592
 593   partubs[0]     =  r1Left;
 594   partubs[1]     =  r2Left;
 595
 596   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 597                                                   partubs[3], partubs[4]);
 598   v0L2->SetNumberOfDivisions(ndiv);
 599
 600   Float_t   r3Left =  r2Left + height3Left;
 601
 602   partubs[0]     =  r2Left;
 603   partubs[1]     =  r3Left;
 604
 605   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 606                                                   partubs[3], partubs[4]);
 607   v0L3->SetNumberOfDivisions(ndiv);
 608
 609   partubs[0]     =  r3Left;
 610   partubs[1]     =  r4Left;
 611
 612   TTUBS *v0L4 = new TTUBS("V0L4", "V0L4", "void", partubs[0], partubs[1], partubs[2],
 613                                                   partubs[3], partubs[4]);
 614   v0L4->SetNumberOfDivisions(ndiv);
 615
 616   Int_t    ndetL   = 1;
 617
 618   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 619
 620   {
 621
 622     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 623
 624     sprintf(nameNode,"SUBDEL%d",ndetL);
 625
 626     v0Lnode->cd();
 627     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 628     v0Lnode0->SetLineColor(kColorVZERO);
 629     fNodes->Add(v0Lnode0);
 630     ndetL++;
 631
 632     sprintf(nameNode,"SUBDEL%d",ndetL);
 633     v0Lnode0->cd();
 634     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 635     v0Lnode1->SetLineColor(kColorVZERO);
 636     fNodes->Add(v0Lnode1);
 637     ndetL++;
 638
 639     sprintf(nameNode,"SUBDEL%d",ndetL);
 640     v0Lnode0->cd();
 641     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 642     v0Lnode2->SetLineColor(kColorVZERO);
 643     fNodes->Add(v0Lnode2);
 644     ndetL++;
 645
 646     sprintf(nameNode,"SUBDEL%d",ndetL);
 647     v0Lnode0->cd();
 648     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 649     v0Lnode3->SetLineColor(kColorVZERO);
 650     fNodes->Add(v0Lnode3);
 651     ndetL++;
 652
 653     sprintf(nameNode,"SUBDEL%d",ndetL);
 654     v0Lnode0->cd();
 655     v0Lnode4 = new TNode(nameNode,nameNode,v0L4,0.0,0.0, 0.0,0);
 656     v0Lnode4->SetLineColor(kColorVZERO);
 657     fNodes->Add(v0Lnode4);
 658     ndetL++;
 659
 660     v0Lnode0->SetVisibility(2);
 661   }
 662 }
 663
 664 //_____________________________________________________________________________
 665 void AliVZEROv4::CreateMaterials()
 666 {
 667
 668 // Creates materials used for geometry
 669
 670     Int_t i;
 671
 672     printf("\n");
 673     for(i=0;i<25;i++) printf("*");
 674     printf(" VZERO create materials ");
 675     for(i=0;i<26;i++) printf("*");
 676     printf("\n");
 677
 678 /*
 679     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,
 680                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 681
 682
 683     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,
 684                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 685
 686     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 687                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 688                                  1.662295, 1.68337 };
 689
 690     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 691                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 692
 693     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 694
 695
 696     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 697
 698
 699     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,
 700                                1e-4,1e-4,1e-4,1e-4 };
 701     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 702
 703 */
 704
 705     Int_t *idtmed = fIdtmed->GetArray()-2999;
 706
 707 //    TGeant3 *geant3 = (TGeant3*) gMC;
 708
 709 //  Parameters related to Quarz (SiO2) :
 710
 711     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 712     Int_t nlmatqua;
 713
 714     aqua[0]    = 28.09;
 715     aqua[1]    = 16.;
 716     zqua[0]    = 14.;
 717     zqua[1]    = 8.;
 718     densqua    = 2.64;
 719     nlmatqua   = -2;
 720     wmatqua[0] = 1.;
 721     wmatqua[1] = 2.;
 722
 723 // Parameters  related to aluminum sheets :
 724
 725     Float_t  aal   = 26.98;
 726     Float_t  zal   = 13.00;
 727     Float_t  densal=   2.7;
 728     Float_t  radlal=   8.9;
 729
 730 // Parameters  related to scintillator CH :
 731
 732     Float_t ascin[2] = {1.00794,12.011};
 733     Float_t zscin[2] = {1.,6.};
 734     Float_t wscin[2] = {1.,1.};
 735     Float_t denscin  = 1.032;
 736
 737 //  Definition of materials :
 738
 739     AliMaterial( 1, "AIR A$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
 740     AliMaterial(11, "AIR I$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
 741     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 742     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 743     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 744     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 745
 746     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 747
 748
 749     Int_t   iSXFLD = gAlice->Field()->Integ();
 750     Float_t sXMGMX = gAlice->Field()->Max();
 751
 752     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 753
 754     tmaxfd = 10.;
 755     stemax = 0.1;
 756     deemax = 0.1;
 757     epsil  = 0.001;
 758     stmin  = 0.001;
 759
 760 //  Active Air :
 761     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 762               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 763
 764 //  Inactive air :
 765
 766     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 767               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 768
 769     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 770               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 771
 772     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 773               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 774
 775     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 776               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 777
 778
 779     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 780               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 781
 782     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 783
 784     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 785     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 786     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 787     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 788
 789     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 790     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 791     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 792     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 793
 794     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 795     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 796     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 797     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 798     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 799     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 800
 801     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 802     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 803     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 804     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 805
 806     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 807     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 808     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 809     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 810     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 811     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 812
 813     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 814     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 815     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 816     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 817     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 818     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 819
 820
 821 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 822 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 823
 824 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 825 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 826
 827 }
 828
 829 //_____________________________________________________________________________
 830 void AliVZEROv4::DrawModule()
 831 {
 832
 833 //  Drawing is done in DrawVZERO.C
 834
 835    Int_t i;
 836
 837    printf("\n");
 838    for(i=0;i<30;i++) printf("*");
 839    printf(" VZERO DrawModule ");
 840    for(i=0;i<30;i++) printf("*");
 841    printf("\n");
 842 }
 843
 844 //_____________________________________________________________________________
 845 void AliVZEROv4::Init()
 846 {
 847 // Initialises version 2 of the VZERO Detector
 848 // Just prints an information message
 849
 850    printf(" VZERO version %d initialized \n",IsVersion());
 851
 852 //   gMC->SetMaxStep(fMaxStepAlu);
 853 //   gMC->SetMaxStep(fMaxStepQua);
 854
 855     AliVZERO::Init();
 856 }
 857
 858 //_____________________________________________________________________________
 859 void AliVZEROv4::StepManager()
 860 {
 861
 862 // Step Manager, called at each step
 863
 864      Int_t     copy;
 865      static    Int_t   vol[4];
 866      static    Float_t hits[21];
 867      static    Float_t eloss, tlength;
 868      static    Int_t   nPhotonsInStep;
 869      static    Int_t   nPhotons;
 870      static    Int_t   numStep;
 871      Float_t   ringNumber;
 872      Float_t   destep, step;
 873
 874      numStep += 1;
 875
 876 //   We keep only charged tracks :
 877
 878      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 879
 880      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 881      vol[2]    = gMC->CurrentVolID(copy);
 882      vol[3]    = copy;
 883
 884      if      ( gMC->CurrentVolID(copy) == gMC->VolId("V0R1") ||
 885                gMC->CurrentVolID(copy) == gMC->VolId("V0L1") )
 886                ringNumber = 1.0;
 887      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R2") ||
 888                gMC->CurrentVolID(copy) == gMC->VolId("V0L2") )
 889                ringNumber = 2.0;
 890      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R3") ||
 891                gMC->CurrentVolID(copy) == gMC->VolId("V0L3") )
 892                ringNumber = 3.0;
 893      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R4") ||
 894                gMC->CurrentVolID(copy) == gMC->VolId("V0L4") )
 895                ringNumber = 4.0;
 896      else
 897                ringNumber = 0.0;
 898
 899      if  (  ringNumber > 0.5  ) {
 900
 901         destep    = gMC->Edep();
 902         step      = gMC->TrackStep();
 903
 904         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 905         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 906
 907         eloss    += destep;
 908         tlength  += step;
 909
 910         if  ( gMC->IsTrackEntering()  )  {
 911
 912             nPhotons  =  nPhotonsInStep;
 913             gMC->TrackPosition(fTrackPosition);
 914             gMC->TrackMomentum(fTrackMomentum);
 915
 916             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 917                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 918
 919             hits[0]  = fTrackPosition.X();
 920             hits[1]  = fTrackPosition.Y();
 921             hits[2]  = fTrackPosition.Z();
 922             hits[3]  = Float_t (gMC->TrackPid());
 923
 924             hits[4]  = gMC->TrackTime();
 925             hits[5]  = gMC->TrackCharge();
 926             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 927             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 928             hits[8]  = ringNumber;
 929
 930             hits[9]  = pt;
 931             hits[10] = fTrackMomentum.P();
 932             hits[11] = fTrackMomentum.Px();
 933             hits[12] = fTrackMomentum.Py();
 934             hits[13] = fTrackMomentum.Pz();
 935
 936             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 937             hits[14] = par->Vx();
 938             hits[15] = par->Vy();
 939             hits[16] = par->Vz();
 940
 941             tlength  = 0.0;
 942             eloss    = 0.0;
 943          }
 944
 945          nPhotons  = nPhotons + nPhotonsInStep;
 946
 947          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 948
 949          nPhotons  = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
 950          nPhotons  = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
 951
 952          hits[17] =   eloss;
 953          hits[18] = tlength;
 954          hits[19] = nPhotons;
 955          hits[20] = GetCellId (vol, hits);
 956
 957          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 958
 959          tlength         = 0.0;
 960          eloss           = 0.0;
 961          nPhotons        =   0;
 962          nPhotonsInStep  =   0;
 963
 964          numStep         =   0;
 965          }
 966     }
 967
 968 }
 969
 970 //_____________________________________________________________________________
 971 void AliVZEROv4::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 972 {
 973
 974 //  Adds a VZERO hit
 975
 976   TClonesArray &lhits = *fHits;
 977   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 978 }
 979
 980 //_____________________________________________________________________________
 981 void AliVZEROv4::AddDigits(Int_t *tracks, Int_t* digits)
 982 {
 983
 984 //  Adds a VZERO digit
 985
 986    TClonesArray  &ldigits = *fDigits;
 987    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 988 }
 989
 990 //_____________________________________________________________________________
 991 void AliVZEROv4::MakeBranch(Option_t *option)
 992 {
 993
 994 // Creates new branches in the current Root Tree
 995
 996   char branchname[10];
 997   sprintf(branchname,"%s",GetName());
 998   printf(" fBufferSize = %d \n",fBufferSize);
 999
1000   const char *cH = strstr(option,"H");
1001
1002   if (fHits   && TreeH() && cH) {
1003     TreeH()->Branch(branchname,&fHits, fBufferSize);
1004     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1005   }
1006
1007   const char *cD = strstr(option,"D");
1008
1009   if (fDigits   && fLoader->TreeD() && cD) {
1010     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1011     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1012   }
1013
1014 }
1015
1016 //_____________________________________________________________________________
1017 Int_t AliVZEROv4::GetCellId(Int_t *vol, Float_t *hits)
1018 {
1019
1020   //   Returns Id of scintillator cell
1021   //   Right side from  0 to 47
1022   //   Left  side from 48 to 95
1023
1024    Int_t index = vol[1];
1025    fCellId     = 0;
1026
1027    if (index < 10) index = index + 12;
1028
1029    if (hits[2] < 0.0) {
1030       index = (index - 10) + ( ( Int_t(hits[8]) - 1 ) * 12);
1031       fCellId   = index;
1032    }
1033    else if (hits[2] > 0.0)
1034    {
1035       index = (index + 38) + ( ( Int_t(hits[8]) - 1 ) * 12);
1036       fCellId   = index;}
1037
1038    return fCellId;
1039 }