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   *
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  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 //////////////////////////////////////////////////////////////////////
  19 //                                                                  //
  20 //  (V-zero) detector  version 3  as designed by the Lyon group     //
  21 //   All comments should be sent to Brigitte CHEYNIS :              //
  22 //                                  b.cheynis@ipnl.in2p3.fr         //
  23 //   Geometry of the   4th of december 2003                         //
  24 //  (now 3 rings instead of 5 rings as in previous versions -budget //
  25 //   cuts !! - therefore changes in cell dimensions and offsets)    //
  26 //   previous ring 1 and ring 2 become now ring 1                   //
  27 //   previous ring 3 and ring 4 become now ring 2                   //
  28 //   previous ring 5 becomes now ring 3  - both for Left and Right  //
  29 //   V0R (now V0C) sits between Z values  -89.4 and  -84.9 cm       //
  30 //   V0L (now V0A) sits between Z values +350.0 and +352.0 cm       //
  31 //   New coordinate system has been implemented in october 2003     //
  32 //                                                                  //
  33 //////////////////////////////////////////////////////////////////////
  34
  35 // --- Standard libraries ---
  36 #include <Riostream.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39
  40 // --- ROOT libraries ---
  41 #include <TClonesArray.h>
  42 #include <TGeometry.h>
  43 #include <TLorentzVector.h>
  44 #include <TMath.h>
  45 #include <TNode.h>
  46 #include <TObjectTable.h>
  47 #include <TTUBE.h>
  48 #include <TTUBS.h>
  49 #include <TVirtualMC.h>
  50 #include <TParticle.h>
  51
  52 // --- AliRoot header files ---
  53 #include "AliConst.h"
  54 #include "AliLog.h"
  55 #include "AliMC.h"
  56 #include "AliMagF.h"
  57 #include "AliRun.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   AliDebug(2,"Create VZERO object");
  79
  80   fLightYield              =  93.75;
  81   fLightAttenuation        =   0.05;
  82   fnMeters                 =   15.0;
  83   fFibToPhot               =    0.3;
  84
  85 }
  86
  87 //_____________________________________________________________________________
  88 void AliVZEROv3::CreateGeometry()
  89 {
  90
  91 // Creates the GEANT geometry of the V-zero Detector  version 3
  92
  93   AliDebug(2,"Create VZERO Geometry");
  94
  95   Int_t    *idtmed = fIdtmed->GetArray()-2999;
  96
  97   Int_t    ndetR = 1;
  98   Int_t    ndetL = 1;
  99
 100   Int_t    ncellsR = 1;
 101   Int_t    ncellsL = 1;
 102
 103   Int_t    idrotm[999];
 104
 105   Float_t  height1Right, height2Right, height3Right;
 106   Float_t  heightRight;
 107   Float_t  theta;
 108
 109   Float_t  halfThickQua;
 110
 111   Float_t  zdet;
 112   Float_t  r0Right, r3Right;
 113   Float_t  pi = TMath::Pi();
 114
 115   height1Right    =     1.82 + 3.81;  // height of cell 1, in cm
 116   height2Right    =     4.72 + 7.12;  // height of cell 2, in cm
 117   height3Right    =           10.83;  // height of cell 3, in cm
 118
 119   theta       = pi/6.0/2.0;       // half angular opening = 15 degrees
 120
 121   halfThickQua= fThickness1/2.0;  // half thickness of elementary cell (inner ring)
 122
 123 // distance 0.6 cm in zdet accounts for the fact V0R box back lid sits 0.6 away from
 124 // absorber nose sitting at 90 cm. Will use -zdet later...
 125 // size of V0R box  (fThickness) is increased by 1 mm as compared to version v2
 126
 127   fThickness  =    fThickness + 0.1;
 128   zdet        =    90.0 - 0.6 - fThickness/2.0;  // distance to vertex (along Z axis)
 129   r0Right     =    4.05;          // closest distance to center of the beam pipe
 130   heightRight =    height1Right + height2Right + height3Right;
 131   r3Right     =    r0Right + heightRight;
 132
 133 // Creation of mother volume v0LE - left part - :
 134 // Entrance face at  +350.0 cm  (new coordinate system) ...
 135
 136    Float_t   partube[3];
 137
 138    partube[0] =  4.3;
 139    partube[1] = 45.0;
 140    partube[2] = fThickness1/2.0;
 141
 142    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 143
 144 // Creation of five rings - left part - :
 145 // Entrance face at +350.0 cm  (new coordinate system) ...
 146
 147 // Mother volume v0L0 in which will be set 5 scintillator cells
 148
 149   Float_t   partubs[5];
 150
 151   Float_t   r0Left      =   4.3;
 152   Float_t   height1Left =   2.6 +  4.1;  // previous ring 1 + ring 2
 153   Float_t   height2Left =   6.4 + 10.2;  // previous ring 3 + ring 4
 154   Float_t   height3Left =  16.9;
 155   Float_t   heightLeft  =   height1Left + height2Left + height3Left;
 156
 157   Float_t   r3Left      =   r0Left  + heightLeft;
 158
 159   partubs[0]     =  r0Left;
 160   partubs[1]     =  r3Left;
 161   partubs[2]     =  fThickness1/2.0;
 162   partubs[3]     =  90.0-15.0;
 163   partubs[4]     = 120.0-15.0;
 164
 165   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 166
 167   Float_t  r1Left =  r0Left + height1Left;
 168
 169   partubs[0]     =  r0Left;
 170   partubs[1]     =  r1Left;
 171
 172   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 173   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 174
 175   Float_t  r2Left  =  r1Left + height2Left;
 176
 177   partubs[0]     =  r1Left;
 178   partubs[1]     =  r2Left;
 179
 180   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 181   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 182
 183   partubs[0]     =  r2Left;
 184   partubs[1]     =  r3Left;
 185
 186   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 187   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 188
 189
 190 // Creation of mother volume v0RI - right part - :
 191
 192   partube[0] = r0Right - 0.2;
 193   partube[1] = r3Right + 1.0;
 194   partube[2] = fThickness/2.0;
 195
 196   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 197
 198 // Creation of  carbon lids (3.5 mm thick) to keep v0RI box shut...
 199
 200   Float_t  lidThickness = 0.35;
 201
 202   partube[0] =   r0Right;
 203   partube[1] =   r3Right;
 204   partube[2] =   +lidThickness/2.0;
 205
 206   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 207   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 208   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 209
 210 // Creation of aluminum rings to maintain the v0RI pieces ...
 211
 212   partube[0] =   r0Right - 0.2;
 213   partube[1] =   r0Right;
 214   partube[2] =   +fThickness/2.0;
 215
 216   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 217   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 218
 219   partube[0] =   r3Right;
 220   partube[1] =   r3Right + 1.0;
 221   partube[2] =   +fThickness/2.0;
 222
 223   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 224   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 225
 226 // Mother volume v0R0 in which will be set 3  scintillator cells
 227
 228   partubs[0]      =  r0Right;
 229   partubs[1]      =  r3Right;
 230   partubs[2]      =  fThickness/2.0;
 231   partubs[3]      =  90.0-15.0;
 232   partubs[4]      = 120.0-15.0;
 233
 234   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 235
 236 // Elementary cell of ring 1 :
 237 // (cells of ring 1  will be shifted by 1.7 cm towards vertex to output fibers)
 238
 239   Float_t   offsetFibers  =  1.7;
 240   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 241   Float_t   r1Right       =  r0Right + height1Right;
 242
 243   partubs[0]     =  r0Right;
 244   partubs[1]     =  r1Right;
 245   partubs[2]     =  fThickness1/2.0;
 246
 247   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 248   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 249
 250 // Elementary cell of ring 2 :
 251
 252   Float_t   r2Right   =  r1Right + height2Right;
 253
 254   partubs[0]     =  r1Right;
 255   partubs[1]     =  r2Right;
 256
 257   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 258   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 259
 260
 261 // Elementary cell of ring 3 :
 262
 263   partubs[0]     =  r2Right;
 264   partubs[1]     =  r3Right;
 265
 266   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 267   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 268
 269
 270   Float_t  phiDeg = 180./6.;
 271
 272 // Right part :
 273
 274   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 275       {
 276         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 277         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 278                           0.0,0.0,idrotm[902],"ONLY");
 279         ndetR++;
 280        }
 281
 282   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 283
 284   ncellsR = (ndetR - 1) * 3;
 285   AliInfo(Form("Number of cells on Right side =   %d",ncellsR));
 286
 287 // Left part :
 288
 289   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 290       {
 291         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 292         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 293                           0.0,0.0,idrotm[902],"ONLY");
 294         ndetL++;
 295        }
 296
 297   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 298
 299   ncellsL = (ndetL - 1) * 3;
 300   AliInfo(Form("Number of cells on Left side  =   %d",  ncellsL));
 301
 302 }
 303
 304 //_____________________________________________________________________________
 305 void AliVZEROv3::BuildGeometry()
 306 {
 307
 308 // Builds simple ROOT TNode geometry for event display
 309
 310   AliDebug(2,"VZERO BuildGeometry");
 311
 312   TNode *top;
 313
 314   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 315   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3;
 316   TNode *v0Lnode, *v0Lnode0;
 317   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3;
 318
 319   const int kColorVZERO  = kGreen;
 320
 321   top = gAlice->GetGeometry()->GetNode("alice");
 322
 323   Float_t  height1Right, height2Right, height3Right;
 324   Float_t  heightRight;
 325   Float_t  theta;
 326
 327   Float_t  halfThickQua;
 328   Float_t  zdet;
 329   Float_t  r0Right, r3Right;
 330   Float_t  pi = TMath::Pi();
 331
 332   height1Right      =     1.82 + 3.81;       // height of cell 1, in cm
 333   height2Right      =     4.72 + 7.12;       // height of cell 2, in cm
 334   height3Right      =           10.83;       // height of cell 3, in cm
 335
 336   theta             =    pi/6.0/2.0;
 337
 338   halfThickQua      =    fThickness1/2.0;
 339
 340   zdet              =    90.0 - 0.6 - fThickness/2.0;
 341   r0Right                =    4.05;
 342   heightRight            =    height1Right + height2Right + height3Right;
 343   r3Right                =    r0Right + heightRight;
 344
 345   Int_t     ndiv    =     1;
 346
 347   Float_t   partube[3];
 348
 349   partube[0] =  r0Right - 0.2;
 350   partube[1] =  r3Right + 1.0;
 351   partube[2] = fThickness/2.0;
 352
 353   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 354
 355   top->cd();
 356
 357   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 358
 359   v0Rnode->SetLineColor(kYellow);
 360   fNodes->Add(v0Rnode);
 361   v0Rnode->SetVisibility(2);
 362
 363 // Rondelles de carbone (epaisseur 3.5 mm) de maintien des cellules ...
 364
 365   Float_t  lidThickness = 0.35;
 366
 367   partube[0] =   r0Right;
 368   partube[1] =   r3Right;
 369   partube[2] =   +lidThickness/2.0;
 370
 371   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 372
 373   v0Rnode->cd();
 374   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 375   v0Rnode6->SetLineColor(kYellow);
 376   fNodes->Add(v0Rnode6);
 377   v0Rnode->cd();
 378   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 379   v0Rnode7->SetLineColor(kYellow);
 380   fNodes->Add(v0Rnode7);
 381
 382   partube[0] =   r0Right - 0.2;
 383   partube[1] =   r0Right;
 384   partube[2] =   +fThickness/2.0;
 385
 386   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 387
 388   v0Rnode->cd();
 389   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 390   v0Rnode8->SetLineColor(kYellow);
 391   fNodes->Add(v0Rnode8);
 392
 393   partube[0] =   r3Right;
 394   partube[1] =   r3Right + 1.0;
 395   partube[2] =   +fThickness/2.0;
 396
 397   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 398
 399   v0Rnode->cd();
 400   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 401   v0Rnode9->SetLineColor(kYellow);
 402   fNodes->Add(v0Rnode9);
 403
 404   Float_t   partubs[5];
 405
 406   partubs[0]      =  r0Right;
 407   partubs[1]      =  r3Right;
 408   partubs[2]      =  fThickness/2.0;
 409   partubs[3]      =  90.0-15.0;
 410   partubs[4]      = 120.0-15.0;
 411
 412   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 413                                                   partubs[3], partubs[4]);
 414
 415   v0R0->SetNumberOfDivisions(ndiv);
 416
 417   Float_t   r1Right =  r0Right + height1Right;
 418   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 419   Float_t   offsetFibers = 1.7;
 420
 421   partubs[0]     =  r0Right;
 422   partubs[1]     =  r1Right;
 423   partubs[2]     =  fThickness1/2.0;
 424
 425   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 426                                                   partubs[3], partubs[4]);
 427
 428   v0R1->SetNumberOfDivisions(ndiv);
 429
 430   Float_t   r2Right   =  r1Right + height2Right;
 431
 432   partubs[0]     =  r1Right;
 433   partubs[1]     =  r2Right;
 434
 435   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 436                                                   partubs[3], partubs[4]);
 437
 438   v0R2->SetNumberOfDivisions(ndiv);
 439
 440   partubs[0]     =  r2Right;
 441   partubs[1]     =  r3Right;
 442
 443   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 444                                                   partubs[3], partubs[4]);
 445   v0R3->SetNumberOfDivisions(ndiv);
 446
 447   Float_t  phi;
 448   Float_t  phiDeg= 180./6.;
 449
 450   Int_t    ndetR = 1;
 451
 452   char     nameNode[12];
 453
 454   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 455
 456   {
 457
 458     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 459
 460     sprintf(nameNode,"SUBDER%d",ndetR);
 461
 462     v0Rnode->cd();
 463     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 464     v0Rnode0->SetLineColor(kYellow);
 465     fNodes->Add(v0Rnode0);
 466     ndetR++;
 467
 468     sprintf(nameNode,"SUBDER%d",ndetR);
 469     v0Rnode0->cd();
 470     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset+ offsetFibers ,0);
 471     v0Rnode1->SetLineColor(kColorVZERO);
 472     fNodes->Add(v0Rnode1);
 473     ndetR++;
 474
 475     sprintf(nameNode,"SUBDER%d",ndetR);
 476     v0Rnode0->cd();
 477     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset,0);
 478     v0Rnode2->SetLineColor(kColorVZERO);
 479     fNodes->Add(v0Rnode2);
 480     ndetR++;
 481
 482     sprintf(nameNode,"SUBDER%d",ndetR);
 483     v0Rnode0->cd();
 484     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset,0);
 485     v0Rnode3->SetLineColor(kColorVZERO);
 486     fNodes->Add(v0Rnode3);
 487     ndetR++;
 488
 489     v0Rnode0->SetVisibility(2);
 490
 491   }
 492
 493 // Left side of VZERO :
 494
 495   Float_t   r0Left      =   4.3;
 496   Float_t   height1Left =   2.6 +  4.1;
 497   Float_t   height2Left =   6.4 + 10.2;
 498   Float_t   height3Left =   16.9;
 499   Float_t   heightLeft  = height1Left + height2Left + height3Left;
 500
 501   Float_t   r3Left      = r0Left  + heightLeft;
 502
 503   partube[0] =  r0Left;
 504   partube[1] =  r3Left;
 505   partube[2] =  fThickness1/2.0;
 506
 507   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 508
 509   top->cd();
 510
 511   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 512
 513   v0Lnode->SetLineColor(kBlue);
 514   fNodes->Add(v0Lnode);
 515
 516   v0Lnode->SetVisibility(2);
 517
 518   partubs[0]      =  r0Left;
 519   partubs[1]      =  r3Left;
 520   partubs[2]      =  fThickness1/2.0;
 521   partubs[3]      =  90.0-15.0;
 522   partubs[4]      = 120.0-15.0;
 523
 524   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 525                                                   partubs[3], partubs[4]);
 526
 527   v0L0->SetNumberOfDivisions(ndiv);
 528   v0L0->SetLineColor(7);
 529
 530   Float_t   offsetLeft;
 531   offsetLeft    = - fThickness1/2.0;
 532
 533   Float_t   r1Left =  r0Left + height1Left;
 534
 535   partubs[0]     =  r0Left;
 536   partubs[1]     =  r1Left;
 537
 538   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 539                                                   partubs[3], partubs[4]);
 540   v0L1->SetNumberOfDivisions(ndiv);
 541
 542   Float_t   r2Left =  r1Left + height2Left;
 543
 544   partubs[0]     =  r1Left;
 545   partubs[1]     =  r2Left;
 546
 547   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 548                                                   partubs[3], partubs[4]);
 549   v0L2->SetNumberOfDivisions(ndiv);
 550
 551   partubs[0]     =  r2Left;
 552   partubs[1]     =  r3Left;
 553
 554   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 555                                                   partubs[3], partubs[4]);
 556   v0L3->SetNumberOfDivisions(ndiv);
 557
 558   Int_t    ndetL   = 1;
 559
 560   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 561
 562   {
 563
 564     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 565
 566
 567     sprintf(nameNode,"SUBDEL%d",ndetL);
 568
 569     v0Lnode->cd();
 570     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 571     v0Lnode0->SetLineColor(kColorVZERO);
 572     fNodes->Add(v0Lnode0);
 573     ndetL++;
 574
 575     sprintf(nameNode,"SUBDEL%d",ndetL);
 576     v0Lnode0->cd();
 577     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 578     v0Lnode1->SetLineColor(kColorVZERO);
 579     fNodes->Add(v0Lnode1);
 580     ndetL++;
 581
 582     sprintf(nameNode,"SUBDEL%d",ndetL);
 583     v0Lnode0->cd();
 584     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 585     v0Lnode2->SetLineColor(kColorVZERO);
 586     fNodes->Add(v0Lnode2);
 587     ndetL++;
 588
 589     sprintf(nameNode,"SUBDEL%d",ndetL);
 590     v0Lnode0->cd();
 591     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 592     v0Lnode3->SetLineColor(kColorVZERO);
 593     fNodes->Add(v0Lnode3);
 594     ndetL++;
 595
 596     v0Lnode0->SetVisibility(2);
 597
 598   }
 599
 600 }
 601
 602 //_____________________________________________________________________________
 603 void AliVZEROv3::CreateMaterials()
 604 {
 605
 606 // Creates materials used for geometry
 607
 608     AliDebug(2,"VZERO create materials");
 609
 610 /*
 611     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,
 612                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 613
 614
 615     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,
 616                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 617
 618     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 619                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 620                                  1.662295, 1.68337 };
 621
 622     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 623                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 624
 625     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 626
 627
 628     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 629
 630
 631     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,
 632                                1e-4,1e-4,1e-4,1e-4 };
 633     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 634
 635 */
 636
 637     Int_t *idtmed = fIdtmed->GetArray()-2999;
 638
 639
 640 //  Parameters related to Quarz (SiO2) :
 641
 642     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 643     Int_t nlmatqua;
 644
 645     aqua[0]    = 28.09;
 646     aqua[1]    = 16.;
 647     zqua[0]    = 14.;
 648     zqua[1]    = 8.;
 649     densqua    = 2.64;
 650     nlmatqua   = -2;
 651     wmatqua[0] = 1.;
 652     wmatqua[1] = 2.;
 653
 654 // Parameters  related to aluminum sheets :
 655
 656     Float_t  aal   = 26.98;
 657     Float_t  zal   = 13.00;
 658     Float_t  densal=   2.7;
 659     Float_t  radlal=   8.9;
 660
 661 // Parameters  related to scintillator CH :
 662
 663     Float_t ascin[2] = {1.00794,12.011};
 664     Float_t zscin[2] = {1.,6.};
 665     Float_t wscin[2] = {1.,1.};
 666     Float_t denscin  = 1.032;
 667
 668 // AIR
 669
 670     Float_t aAir[4]={12.,14.,16.,36.};
 671     Float_t zAir[4]={6.,7.,8.,18.};
 672     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 673     Float_t dAir = 1.20479E-3;
 674
 675 //  Definition of materials :
 676
 677 // AIR
 678
 679     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 680     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 681     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 682     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 683     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 684     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 685
 686     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 687
 688
 689     Int_t   iSXFLD = gAlice->Field()->Integ();
 690     Float_t sXMGMX = gAlice->Field()->Max();
 691
 692     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 693
 694     tmaxfd = 10.;
 695     stemax = 0.1;
 696     deemax = 0.1;
 697     epsil  = 0.001;
 698     stmin  = 0.001;
 699
 700 //  Active Air :
 701     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 702               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 703
 704 //  Inactive air :
 705
 706     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 707               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 708
 709     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 710               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 711
 712     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 713               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 714
 715     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 716               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 717
 718
 719     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 720               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 721
 722     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 723
 724     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 725     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 726     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 727     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 728
 729     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 730     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 731     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 732     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 733
 734     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 735     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 736     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 737     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 738     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 739     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 740
 741     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 742     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 743     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 744     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 745
 746     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 747     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 748     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 749     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 750     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 751     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 752
 753     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 754     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 755     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 756     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 757     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 758     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 759
 760
 761 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 762 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 763
 764 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 765 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 766
 767 }
 768
 769 //_____________________________________________________________________________
 770 void AliVZEROv3::DrawModule() const
 771 {
 772
 773 //  Drawing is done in DrawVZERO.C
 774
 775    AliDebug(2,"VZERO DrawModule");
 776
 777 }
 778
 779 //_____________________________________________________________________________
 780 void AliVZEROv3::Init()
 781 {
 782 // Initialises version 2 of the VZERO Detector
 783 // Just prints an information message
 784
 785   AliInfo(Form("VZERO version %d initialized",IsVersion()));
 786
 787 //   gMC->SetMaxStep(fMaxStepAlu);
 788 //   gMC->SetMaxStep(fMaxStepQua);
 789
 790     AliVZERO::Init();
 791
 792 }
 793
 794
 795 //_____________________________________________________________________________
 796 void AliVZEROv3::StepManager()
 797 {
 798
 799 // Step Manager, called at each step
 800
 801      Int_t     copy;
 802      static    Int_t   vol[4];
 803      static    Float_t hits[21];
 804      static    Float_t eloss, tlength;
 805      static    Int_t   nPhotonsInStep;
 806      static    Int_t   nPhotons;
 807      static    Int_t   numStep;
 808      Float_t   ringNumber;
 809      Float_t   destep, step;
 810
 811      numStep += 1;
 812
 813 //   We keep only charged tracks :
 814
 815      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 816
 817      static Int_t idV0R1 = gMC->VolId("V0R1");
 818      static Int_t idV0L1 = gMC->VolId("V0L1");
 819      static Int_t idV0R2 = gMC->VolId("V0R2");
 820      static Int_t idV0L2 = gMC->VolId("V0L2");
 821      static Int_t idV0R3 = gMC->VolId("V0R3");
 822      static Int_t idV0L3 = gMC->VolId("V0L3");
 823
 824      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 825      vol[2]    = gMC->CurrentVolID(copy);
 826      vol[3]    = copy;
 827
 828      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 829                gMC->CurrentVolID(copy) == idV0L1 )
 830                ringNumber = 1.0;
 831      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 832                gMC->CurrentVolID(copy) == idV0L2 )
 833                ringNumber = 2.0;
 834      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 835                gMC->CurrentVolID(copy) == idV0L3 )
 836                ringNumber = 3.0;
 837      else
 838                ringNumber = 0.0;
 839
 840      if  (  ringNumber > 0.5  ) {
 841
 842         destep    = gMC->Edep();
 843         step      = gMC->TrackStep();
 844
 845         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 846         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 847
 848         eloss    += destep;
 849         tlength  += step;
 850
 851         if  ( gMC->IsTrackEntering()  )  {
 852
 853             nPhotons  =  nPhotonsInStep;
 854             gMC->TrackPosition(fTrackPosition);
 855             gMC->TrackMomentum(fTrackMomentum);
 856
 857             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 858                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 859
 860             hits[0]  = fTrackPosition.X();
 861             hits[1]  = fTrackPosition.Y();
 862             hits[2]  = fTrackPosition.Z();
 863             hits[3]  = Float_t (gMC->TrackPid());
 864
 865             hits[4]  = gMC->TrackTime();
 866             hits[5]  = gMC->TrackCharge();
 867             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 868             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 869             hits[8]  = ringNumber;
 870
 871             hits[9]  = pt;
 872             hits[10] = fTrackMomentum.P();
 873             hits[11] = fTrackMomentum.Px();
 874             hits[12] = fTrackMomentum.Py();
 875             hits[13] = fTrackMomentum.Pz();
 876
 877             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 878             hits[14] = par->Vx();
 879             hits[15] = par->Vy();
 880             hits[16] = par->Vz();
 881
 882             tlength  = 0.0;
 883             eloss    = 0.0;
 884
 885          }
 886
 887          nPhotons  = nPhotons + nPhotonsInStep;
 888
 889          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 890
 891          nPhotons  = nPhotons - Int_t( (Float_t(nPhotons) * fLightAttenuation * fnMeters) );
 892          nPhotons  = nPhotons - Int_t(  Float_t(nPhotons) * fFibToPhot );
 893
 894          hits[17] =   eloss;
 895          hits[18] = tlength;
 896          hits[19] = nPhotons;
 897          hits[20] = GetCellId (vol, hits);
 898
 899          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 900
 901          tlength         = 0.0;
 902          eloss           = 0.0;
 903          nPhotons        =   0;
 904          nPhotonsInStep  =   0;
 905
 906          numStep         =   0;
 907          }
 908     }
 909
 910 }
 911
 912 //_____________________________________________________________________________
 913 void AliVZEROv3::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 914 {
 915
 916 //  Adds a VZERO hit
 917
 918   TClonesArray &lhits = *fHits;
 919   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 920 }
 921
 922 //_____________________________________________________________________________
 923 void AliVZEROv3::AddDigits(Int_t *tracks, Int_t* digits)
 924 {
 925
 926 //  Adds a VZERO digit
 927
 928    TClonesArray  &ldigits = *fDigits;
 929    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 930 }
 931
 932 //_____________________________________________________________________________
 933 void AliVZEROv3::MakeBranch(Option_t *option)
 934 {
 935
 936 // Creates new branches in the current Root Tree
 937
 938   char branchname[10];
 939   sprintf(branchname,"%s",GetName());
 940   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
 941
 942   const char *cH = strstr(option,"H");
 943
 944   if (fHits   && TreeH() && cH) {
 945     TreeH()->Branch(branchname,&fHits, fBufferSize);
 946     AliDebug(2,Form("Making Branch %s for hits",branchname));
 947   }
 948
 949   const char *cD = strstr(option,"D");
 950
 951   if (fDigits   && fLoader->TreeD() && cD) {
 952     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
 953     AliDebug(2,Form("Making Branch %s for digits",branchname));
 954   }
 955
 956 }
 957
 958 //_____________________________________________________________________________
 959 Int_t AliVZEROv3::GetCellId(Int_t *vol, Float_t *hits)
 960 {
 961
 962   //   Returns Id of scintillator cell
 963   //   Right side from  0 to 35
 964   //   Left  side from 36 to 71
 965
 966    Int_t index = vol[1];
 967    fCellId     = 0;
 968
 969    if (index < 10) index = index + 12;
 970
 971    if (hits[2] < 0.0) {
 972       index = (index - 10) + ( ( Int_t(hits[8]) - 1 ) * 12);
 973       fCellId   = index;
 974    }
 975    else if (hits[2] > 0.0)
 976    {
 977       index = (index  + 26) + ( ( Int_t(hits[8]) - 1 ) * 12);
 978       fCellId   = index;}
 979
 980    return fCellId;
 981 }