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
  63 ClassImp(AliVZEROv3)
  64
  65 //_____________________________________________________________________________
  66 AliVZEROv3:: AliVZEROv3():AliVZERO()
  67 {
  68 // Standard default constructor
  69 }
  70
  71 //_____________________________________________________________________________
  72 AliVZEROv3::AliVZEROv3(const char *name, const char *title):
  73  AliVZERO(name,title)
  74 {
  75
  76 // Standard constructor for V-zero Detector  version 2
  77
  78   Int_t i;
  79
  80   printf("\n");
  81   for(i=0;i<26;i++) printf("*");
  82   printf(" Create VZERO object ");
  83   for(i=0;i<26;i++) printf("*");
  84   printf("\n");
  85
  86   fLightYield              =  93.75;
  87   fLightAttenuation        =   0.05;
  88   fnMeters                 =   15.0;
  89   fFibToPhot               =    0.3;
  90
  91 }
  92
  93 //_____________________________________________________________________________
  94 void AliVZEROv3::CreateGeometry()
  95 {
  96
  97 // Creates the GEANT geometry of the V-zero Detector  version 3
  98
  99   Int_t i;
 100
 101   printf("\n");
 102   for(i=0;i<26;i++) printf("*");
 103   printf(" Create VZERO Geometry ");
 104   for(i=0;i<26;i++) printf("*");
 105   printf("\n");
 106
 107   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 108
 109   Int_t    ndetR = 1;
 110   Int_t    ndetL = 1;
 111
 112   Int_t    ncellsR = 1;
 113   Int_t    ncellsL = 1;
 114
 115   Int_t    idrotm[999];
 116
 117   Float_t  height1Right, height2Right, height3Right;
 118   Float_t  heightRight;
 119   Float_t  theta;
 120
 121   Float_t  halfThickQua;
 122
 123   Float_t  zdet;
 124   Float_t  r0Right, r3Right;
 125   Float_t  pi = TMath::Pi();
 126
 127   height1Right    =     1.82 + 3.81;  // height of cell 1, in cm
 128   height2Right    =     4.72 + 7.12;  // height of cell 2, in cm
 129   height3Right    =           10.83;  // height of cell 3, in cm
 130
 131   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 132
 133   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 134
 135 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 136 // absorber nose sitting at 90 cm. Will use -zdet later...
 137 // size of V0R box  (fThickness) is increased by 1 mm as compared to version v2
 138
 139   fThickness  =    fThickness + 0.1;
 140   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 141   r0Right     =    4.05;          // closest distance to center of the beam pipe
 142   heightRight =    height1Right + height2Right + height3Right;
 143   r3Right     =    r0Right + heightRight;
 144
 145 // Creation of mother volume v0LE - left part - :
 146 // Entrance face at  +350.0 cm  (new coordinate system) ...
 147
 148    Float_t   partube[3];
 149
 150    partube[0] =  4.3;
 151    partube[1] = 45.0;
 152    partube[2] = fThickness1/2.0;
 153
 154    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 155
 156 // Creation of five rings - left part - :
 157 // Entrance face at +350.0 cm  (new coordinate system) ...
 158
 159 // Mother volume v0L0 in which will be set 5 scintillator cells
 160
 161   Float_t   partubs[5];
 162
 163   Float_t   r0Left      =   4.3;
 164   Float_t   height1Left =   2.6 +  4.1;  // previous ring 1 + ring 2
 165   Float_t   height2Left =   6.4 + 10.2;  // previous ring 3 + ring 4
 166   Float_t   height3Left =  16.9;
 167   Float_t   heightLeft  =   height1Left + height2Left + height3Left;
 168
 169   Float_t   r3Left      =   r0Left  + heightLeft;
 170
 171   partubs[0]     =  r0Left;
 172   partubs[1]     =  r3Left;
 173   partubs[2]     =  fThickness1/2.0;
 174   partubs[3]     =  90.0-15.0;
 175   partubs[4]     = 120.0-15.0;
 176
 177   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 178
 179   Float_t  r1Left =  r0Left + height1Left;
 180
 181   partubs[0]     =  r0Left;
 182   partubs[1]     =  r1Left;
 183
 184   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 185   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 186
 187   Float_t  r2Left  =  r1Left + height2Left;
 188
 189   partubs[0]     =  r1Left;
 190   partubs[1]     =  r2Left;
 191
 192   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 193   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 194
 195   partubs[0]     =  r2Left;
 196   partubs[1]     =  r3Left;
 197
 198   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 199   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 200
 201
 202 // Creation of mother volume v0RI - right part - :
 203
 204   partube[0] = r0Right - 0.2;
 205   partube[1] = r3Right + 1.0;
 206   partube[2] = fThickness/2.0;
 207
 208   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 209
 210 // Creation of  carbon lids (3.5 mm thick) to keep v0RI box shut...
 211
 212   Float_t  lidThickness = 0.35;
 213
 214   partube[0] =   r0Right;
 215   partube[1] =   r3Right;
 216   partube[2] =   +lidThickness/2.0;
 217
 218   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 219   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 220   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 221
 222 // Creation of aluminum rings to maintain the v0RI pieces ...
 223
 224   partube[0] =   r0Right - 0.2;
 225   partube[1] =   r0Right;
 226   partube[2] =   +fThickness/2.0;
 227
 228   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 229   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 230
 231   partube[0] =   r3Right;
 232   partube[1] =   r3Right + 1.0;
 233   partube[2] =   +fThickness/2.0;
 234
 235   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 236   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 237
 238 // Mother volume v0R0 in which will be set 3  scintillator cells
 239
 240   partubs[0]      =  r0Right;
 241   partubs[1]      =  r3Right;
 242   partubs[2]      =  fThickness/2.0;
 243   partubs[3]      =  90.0-15.0;
 244   partubs[4]      = 120.0-15.0;
 245
 246   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 247
 248 // Elementary cell of ring 1 :
 249 // (cells of ring 1  will be shifted by 1.7 cm towards vertex to output fibers)
 250
 251   Float_t   offsetFibers  =  1.7;
 252   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 253   Float_t   r1Right       =  r0Right + height1Right;
 254
 255   partubs[0]     =  r0Right;
 256   partubs[1]     =  r1Right;
 257   partubs[2]     =  fThickness1/2.0;
 258
 259   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 260   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 261
 262 // Elementary cell of ring 2 :
 263
 264   Float_t   r2Right   =  r1Right + height2Right;
 265
 266   partubs[0]     =  r1Right;
 267   partubs[1]     =  r2Right;
 268
 269   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 270   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 271
 272
 273 // Elementary cell of ring 3 :
 274
 275   partubs[0]     =  r2Right;
 276   partubs[1]     =  r3Right;
 277
 278   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 279   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 280
 281
 282   Float_t  phiDeg = 180./6.;
 283
 284 // Right part :
 285
 286   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 287       {
 288         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 289         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 290                           0.0,0.0,idrotm[902],"ONLY");
 291         ndetR++;
 292        }
 293
 294   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 295
 296   ncellsR = (ndetR - 1) * 3;
 297   printf("    Number of cells on Right side =   %d\n",  ncellsR);
 298
 299 // Left part :
 300
 301   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 302       {
 303         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 304         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 305                           0.0,0.0,idrotm[902],"ONLY");
 306         ndetL++;
 307        }
 308
 309   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 310
 311   ncellsL = (ndetL - 1) * 3;
 312   printf("    Number of cells on Left side  =   %d\n",  ncellsL);
 313   for(i=0;i<75;i++) printf("*");
 314   printf("\n");
 315
 316 }
 317
 318 //_____________________________________________________________________________
 319 void AliVZEROv3::BuildGeometry()
 320 {
 321
 322 // Builds simple ROOT TNode geometry for event display
 323
 324   Int_t i;
 325
 326   printf("\n");
 327   for(i=0;i<30;i++) printf("*");
 328   printf(" VZERO BuildGeometry ");
 329   for(i=0;i<30;i++) printf("*");
 330   printf("\n");
 331
 332   TNode *top;
 333
 334   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 335   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3;
 336   TNode *v0Lnode, *v0Lnode0;
 337   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3;
 338
 339   const int kColorVZERO  = kGreen;
 340
 341   top = gAlice->GetGeometry()->GetNode("alice");
 342
 343   Float_t  height1Right, height2Right, height3Right;
 344   Float_t  heightRight;
 345   Float_t  theta;
 346
 347   Float_t  halfThickQua;
 348   Float_t  zdet;
 349   Float_t  r0Right, r3Right;
 350   Float_t  pi = TMath::Pi();
 351
 352   height1Right      =     1.82 + 3.81;       // height of cell 1, in cm
 353   height2Right      =     4.72 + 7.12;       // height of cell 2, in cm
 354   height3Right      =           10.83;       // height of cell 3, in cm
 355
 356   theta             =    pi/6.0/2.0;
 357
 358   halfThickQua      =    fThickness1/2.0;
 359
 360   zdet              =    90.0 - 0.6 - fThickness/2.0;
 361   r0Right                =    4.05;
 362   heightRight            =    height1Right + height2Right + height3Right;
 363   r3Right                =    r0Right + heightRight;
 364
 365   Int_t     ndiv    =     1;
 366
 367   Float_t   partube[3];
 368
 369   partube[0] =  r0Right - 0.2;
 370   partube[1] =  r3Right + 1.0;
 371   partube[2] = fThickness/2.0;
 372
 373   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 374
 375   top->cd();
 376
 377   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 378
 379   v0Rnode->SetLineColor(kYellow);
 380   fNodes->Add(v0Rnode);
 381   v0Rnode->SetVisibility(2);
 382
 383 // Rondelles de carbone (epaisseur 3.5 mm) de maintien des cellules ...
 384
 385   Float_t  lidThickness = 0.35;
 386
 387   partube[0] =   r0Right;
 388   partube[1] =   r3Right;
 389   partube[2] =   +lidThickness/2.0;
 390
 391   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 392
 393   v0Rnode->cd();
 394   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 395   v0Rnode6->SetLineColor(kYellow);
 396   fNodes->Add(v0Rnode6);
 397   v0Rnode->cd();
 398   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 399   v0Rnode7->SetLineColor(kYellow);
 400   fNodes->Add(v0Rnode7);
 401
 402   partube[0] =   r0Right - 0.2;
 403   partube[1] =   r0Right;
 404   partube[2] =   +fThickness/2.0;
 405
 406   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 407
 408   v0Rnode->cd();
 409   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 410   v0Rnode8->SetLineColor(kYellow);
 411   fNodes->Add(v0Rnode8);
 412
 413   partube[0] =   r3Right;
 414   partube[1] =   r3Right + 1.0;
 415   partube[2] =   +fThickness/2.0;
 416
 417   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 418
 419   v0Rnode->cd();
 420   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 421   v0Rnode9->SetLineColor(kYellow);
 422   fNodes->Add(v0Rnode9);
 423
 424   Float_t   partubs[5];
 425
 426   partubs[0]      =  r0Right;
 427   partubs[1]      =  r3Right;
 428   partubs[2]      =  fThickness/2.0;
 429   partubs[3]      =  90.0-15.0;
 430   partubs[4]      = 120.0-15.0;
 431
 432   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 433                                                   partubs[3], partubs[4]);
 434
 435   v0R0->SetNumberOfDivisions(ndiv);
 436
 437   Float_t   r1Right =  r0Right + height1Right;
 438   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 439   Float_t   offsetFibers = 1.7;
 440
 441   partubs[0]     =  r0Right;
 442   partubs[1]     =  r1Right;
 443   partubs[2]     =  fThickness1/2.0;
 444
 445   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 446                                                   partubs[3], partubs[4]);
 447
 448   v0R1->SetNumberOfDivisions(ndiv);
 449
 450   Float_t   r2Right   =  r1Right + height2Right;
 451
 452   partubs[0]     =  r1Right;
 453   partubs[1]     =  r2Right;
 454
 455   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 456                                                   partubs[3], partubs[4]);
 457
 458   v0R2->SetNumberOfDivisions(ndiv);
 459
 460   partubs[0]     =  r2Right;
 461   partubs[1]     =  r3Right;
 462
 463   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 464                                                   partubs[3], partubs[4]);
 465   v0R3->SetNumberOfDivisions(ndiv);
 466
 467   Float_t  phi;
 468   Float_t  phiDeg= 180./6.;
 469
 470   Int_t    ndetR = 1;
 471
 472   char     nameNode[12];
 473
 474   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 475
 476   {
 477
 478     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 479
 480     sprintf(nameNode,"SUBDER%d",ndetR);
 481
 482     v0Rnode->cd();
 483     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 484     v0Rnode0->SetLineColor(kYellow);
 485     fNodes->Add(v0Rnode0);
 486     ndetR++;
 487
 488     sprintf(nameNode,"SUBDER%d",ndetR);
 489     v0Rnode0->cd();
 490     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset+ offsetFibers ,0);
 491     v0Rnode1->SetLineColor(kColorVZERO);
 492     fNodes->Add(v0Rnode1);
 493     ndetR++;
 494
 495     sprintf(nameNode,"SUBDER%d",ndetR);
 496     v0Rnode0->cd();
 497     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset,0);
 498     v0Rnode2->SetLineColor(kColorVZERO);
 499     fNodes->Add(v0Rnode2);
 500     ndetR++;
 501
 502     sprintf(nameNode,"SUBDER%d",ndetR);
 503     v0Rnode0->cd();
 504     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset,0);
 505     v0Rnode3->SetLineColor(kColorVZERO);
 506     fNodes->Add(v0Rnode3);
 507     ndetR++;
 508
 509     v0Rnode0->SetVisibility(2);
 510
 511   }
 512
 513 // Left side of VZERO :
 514
 515   Float_t   r0Left      =   4.3;
 516   Float_t   height1Left =   2.6 +  4.1;
 517   Float_t   height2Left =   6.4 + 10.2;
 518   Float_t   height3Left =   16.9;
 519   Float_t   heightLeft  = height1Left + height2Left + height3Left;
 520
 521   Float_t   r3Left      = r0Left  + heightLeft;
 522
 523   partube[0] =  r0Left;
 524   partube[1] =  r3Left;
 525   partube[2] =  fThickness1/2.0;
 526
 527   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 528
 529   top->cd();
 530
 531   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 532
 533   v0Lnode->SetLineColor(kBlue);
 534   fNodes->Add(v0Lnode);
 535
 536   v0Lnode->SetVisibility(2);
 537
 538   partubs[0]      =  r0Left;
 539   partubs[1]      =  r3Left;
 540   partubs[2]      =  fThickness1/2.0;
 541   partubs[3]      =  90.0-15.0;
 542   partubs[4]      = 120.0-15.0;
 543
 544   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 545                                                   partubs[3], partubs[4]);
 546
 547   v0L0->SetNumberOfDivisions(ndiv);
 548   v0L0->SetLineColor(7);
 549
 550   Float_t   offsetLeft;
 551   offsetLeft    = - fThickness1/2.0;
 552
 553   Float_t   r1Left =  r0Left + height1Left;
 554
 555   partubs[0]     =  r0Left;
 556   partubs[1]     =  r1Left;
 557
 558   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 559                                                   partubs[3], partubs[4]);
 560   v0L1->SetNumberOfDivisions(ndiv);
 561
 562   Float_t   r2Left =  r1Left + height2Left;
 563
 564   partubs[0]     =  r1Left;
 565   partubs[1]     =  r2Left;
 566
 567   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 568                                                   partubs[3], partubs[4]);
 569   v0L2->SetNumberOfDivisions(ndiv);
 570
 571   partubs[0]     =  r2Left;
 572   partubs[1]     =  r3Left;
 573
 574   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 575                                                   partubs[3], partubs[4]);
 576   v0L3->SetNumberOfDivisions(ndiv);
 577
 578   Int_t    ndetL   = 1;
 579
 580   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 581
 582   {
 583
 584     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 585
 586
 587     sprintf(nameNode,"SUBDEL%d",ndetL);
 588
 589     v0Lnode->cd();
 590     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 591     v0Lnode0->SetLineColor(kColorVZERO);
 592     fNodes->Add(v0Lnode0);
 593     ndetL++;
 594
 595     sprintf(nameNode,"SUBDEL%d",ndetL);
 596     v0Lnode0->cd();
 597     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 598     v0Lnode1->SetLineColor(kColorVZERO);
 599     fNodes->Add(v0Lnode1);
 600     ndetL++;
 601
 602     sprintf(nameNode,"SUBDEL%d",ndetL);
 603     v0Lnode0->cd();
 604     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 605     v0Lnode2->SetLineColor(kColorVZERO);
 606     fNodes->Add(v0Lnode2);
 607     ndetL++;
 608
 609     sprintf(nameNode,"SUBDEL%d",ndetL);
 610     v0Lnode0->cd();
 611     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 612     v0Lnode3->SetLineColor(kColorVZERO);
 613     fNodes->Add(v0Lnode3);
 614     ndetL++;
 615
 616     v0Lnode0->SetVisibility(2);
 617
 618   }
 619
 620 }
 621
 622 //_____________________________________________________________________________
 623 void AliVZEROv3::CreateMaterials()
 624 {
 625
 626 // Creates materials used for geometry
 627
 628     Int_t i;
 629
 630     printf("\n");
 631     for(i=0;i<25;i++) printf("*");
 632     printf(" VZERO create materials ");
 633     for(i=0;i<26;i++) printf("*");
 634     printf("\n");
 635
 636 /*
 637     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,
 638                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 639
 640
 641     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,
 642                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 643
 644     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 645                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 646                                  1.662295, 1.68337 };
 647
 648     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 649                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 650
 651     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 652
 653
 654     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 655
 656
 657     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,
 658                                1e-4,1e-4,1e-4,1e-4 };
 659     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 660
 661 */
 662
 663     Int_t *idtmed = fIdtmed->GetArray()-2999;
 664
 665 //    TGeant3 *geant3 = (TGeant3*) gMC;
 666
 667 //  Parameters related to Quarz (SiO2) :
 668
 669     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 670     Int_t nlmatqua;
 671
 672     aqua[0]    = 28.09;
 673     aqua[1]    = 16.;
 674     zqua[0]    = 14.;
 675     zqua[1]    = 8.;
 676     densqua    = 2.64;
 677     nlmatqua   = -2;
 678     wmatqua[0] = 1.;
 679     wmatqua[1] = 2.;
 680
 681 // Parameters  related to aluminum sheets :
 682
 683     Float_t  aal   = 26.98;
 684     Float_t  zal   = 13.00;
 685     Float_t  densal=   2.7;
 686     Float_t  radlal=   8.9;
 687
 688 // Parameters  related to scintillator CH :
 689
 690     Float_t ascin[2] = {1.00794,12.011};
 691     Float_t zscin[2] = {1.,6.};
 692     Float_t wscin[2] = {1.,1.};
 693     Float_t denscin  = 1.032;
 694
 695 // AIR
 696
 697     Float_t aAir[4]={12.,14.,16.,36.};
 698     Float_t zAir[4]={6.,7.,8.,18.};
 699     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 700     Float_t dAir = 1.20479E-3;
 701
 702 //  Definition of materials :
 703
 704 // AIR
 705
 706     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 707     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 708     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 709     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 710     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 711     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 712
 713     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 714
 715
 716     Int_t   iSXFLD = gAlice->Field()->Integ();
 717     Float_t sXMGMX = gAlice->Field()->Max();
 718
 719     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 720
 721     tmaxfd = 10.;
 722     stemax = 0.1;
 723     deemax = 0.1;
 724     epsil  = 0.001;
 725     stmin  = 0.001;
 726
 727 //  Active Air :
 728     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 729               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 730
 731 //  Inactive air :
 732
 733     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 734               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 735
 736     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 737               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 738
 739     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 740               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 741
 742     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 743               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 744
 745
 746     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 747               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 748
 749     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 750
 751     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 752     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 753     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 754     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 755
 756     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 757     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 758     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 759     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 760
 761     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 762     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 763     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 764     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 765     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 766     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 767
 768     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 769     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 770     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 771     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 772
 773     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 774     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 775     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 776     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 777     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 778     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 779
 780     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 781     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 782     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 783     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 784     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 785     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 786
 787
 788 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 789 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 790
 791 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 792 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 793
 794 }
 795
 796 //_____________________________________________________________________________
 797 void AliVZEROv3::DrawModule()
 798 {
 799
 800 //  Drawing is done in DrawVZERO.C
 801
 802    Int_t i;
 803
 804    printf("\n");
 805    for(i=0;i<30;i++) printf("*");
 806    printf(" VZERO DrawModule ");
 807    for(i=0;i<30;i++) printf("*");
 808    printf("\n");
 809
 810
 811 }
 812
 813 //_____________________________________________________________________________
 814 void AliVZEROv3::Init()
 815 {
 816 // Initialises version 2 of the VZERO Detector
 817 // Just prints an information message
 818
 819    printf(" VZERO version %d initialized \n",IsVersion());
 820
 821 //   gMC->SetMaxStep(fMaxStepAlu);
 822 //   gMC->SetMaxStep(fMaxStepQua);
 823
 824     AliVZERO::Init();
 825
 826 }
 827
 828
 829 //_____________________________________________________________________________
 830 void AliVZEROv3::StepManager()
 831 {
 832
 833 // Step Manager, called at each step
 834
 835      Int_t     copy;
 836      static    Int_t   vol[4];
 837      static    Float_t hits[21];
 838      static    Float_t eloss, tlength;
 839      static    Int_t   nPhotonsInStep;
 840      static    Int_t   nPhotons;
 841      static    Int_t   numStep;
 842      Float_t   ringNumber;
 843      Float_t   destep, step;
 844
 845      numStep += 1;
 846
 847 //   We keep only charged tracks :
 848
 849      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 850
 851      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 852      vol[2]    = gMC->CurrentVolID(copy);
 853      vol[3]    = copy;
 854
 855      if      ( gMC->CurrentVolID(copy) == gMC->VolId("V0R1") ||
 856                gMC->CurrentVolID(copy) == gMC->VolId("V0L1") )
 857                ringNumber = 1.0;
 858      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R2") ||
 859                gMC->CurrentVolID(copy) == gMC->VolId("V0L2") )
 860                ringNumber = 2.0;
 861      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R3") ||
 862                gMC->CurrentVolID(copy) == gMC->VolId("V0L3") )
 863                ringNumber = 3.0;
 864      else
 865                ringNumber = 0.0;
 866
 867      if  (  ringNumber > 0.5  ) {
 868
 869         destep    = gMC->Edep();
 870         step      = gMC->TrackStep();
 871
 872         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 873         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 874
 875         eloss    += destep;
 876         tlength  += step;
 877
 878         if  ( gMC->IsTrackEntering()  )  {
 879
 880             nPhotons  =  nPhotonsInStep;
 881             gMC->TrackPosition(fTrackPosition);
 882             gMC->TrackMomentum(fTrackMomentum);
 883
 884             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 885                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 886
 887             hits[0]  = fTrackPosition.X();
 888             hits[1]  = fTrackPosition.Y();
 889             hits[2]  = fTrackPosition.Z();
 890             hits[3]  = Float_t (gMC->TrackPid());
 891
 892             hits[4]  = gMC->TrackTime();
 893             hits[5]  = gMC->TrackCharge();
 894             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 895             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 896             hits[8]  = ringNumber;
 897
 898             hits[9]  = pt;
 899             hits[10] = fTrackMomentum.P();
 900             hits[11] = fTrackMomentum.Px();
 901             hits[12] = fTrackMomentum.Py();
 902             hits[13] = fTrackMomentum.Pz();
 903
 904             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 905             hits[14] = par->Vx();
 906             hits[15] = par->Vy();
 907             hits[16] = par->Vz();
 908
 909             tlength  = 0.0;
 910             eloss    = 0.0;
 911
 912          }
 913
 914          nPhotons  = nPhotons + nPhotonsInStep;
 915
 916          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 917
 918          nPhotons  = nPhotons - Int_t( (Float_t(nPhotons) * fLightAttenuation * fnMeters) );
 919          nPhotons  = nPhotons - Int_t(  Float_t(nPhotons) * fFibToPhot );
 920
 921          hits[17] =   eloss;
 922          hits[18] = tlength;
 923          hits[19] = nPhotons;
 924          hits[20] = GetCellId (vol, hits);
 925
 926          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 927
 928          tlength         = 0.0;
 929          eloss           = 0.0;
 930          nPhotons        =   0;
 931          nPhotonsInStep  =   0;
 932
 933          numStep         =   0;
 934          }
 935     }
 936
 937 }
 938
 939 //_____________________________________________________________________________
 940 void AliVZEROv3::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 941 {
 942
 943 //  Adds a VZERO hit
 944
 945   TClonesArray &lhits = *fHits;
 946   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 947 }
 948
 949 //_____________________________________________________________________________
 950 void AliVZEROv3::AddDigits(Int_t *tracks, Int_t* digits)
 951 {
 952
 953 //  Adds a VZERO digit
 954
 955    TClonesArray  &ldigits = *fDigits;
 956    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 957 }
 958
 959 //_____________________________________________________________________________
 960 void AliVZEROv3::MakeBranch(Option_t *option)
 961 {
 962
 963 // Creates new branches in the current Root Tree
 964
 965   char branchname[10];
 966   sprintf(branchname,"%s",GetName());
 967   printf(" fBufferSize = %d \n",fBufferSize);
 968
 969   const char *cH = strstr(option,"H");
 970
 971   if (fHits   && TreeH() && cH) {
 972     TreeH()->Branch(branchname,&fHits, fBufferSize);
 973     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
 974   }
 975
 976   const char *cD = strstr(option,"D");
 977
 978   if (fDigits   && fLoader->TreeD() && cD) {
 979     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 980     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
 981   }
 982
 983 }
 984
 985 //_____________________________________________________________________________
 986 Int_t AliVZEROv3::GetCellId(Int_t *vol, Float_t *hits)
 987 {
 988
 989   //   Returns Id of scintillator cell
 990   //   Right side from  0 to 35
 991   //   Left  side from 36 to 71
 992
 993    Int_t index = vol[1];
 994    fCellId     = 0;
 995
 996    if (index < 10) index = index + 12;
 997
 998    if (hits[2] < 0.0) {
 999       index = (index - 10) + ( ( Int_t(hits[8]) - 1 ) * 12);
1000       fCellId   = index;
1001    }
1002    else if (hits[2] > 0.0)
1003    {
1004       index = (index  + 26) + ( ( Int_t(hits[8]) - 1 ) * 12);
1005       fCellId   = index;}
1006
1007    return fCellId;
1008 }