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 <TGeometry.h>
  39 #include <TLorentzVector.h>
  40 #include <TMath.h>
  41 #include <TNode.h>
  42 #include <TObjectTable.h>
  43 #include <TTUBE.h>
  44 #include <TTUBS.h>
  45 #include <TVirtualMC.h>
  46 #include <TParticle.h>
  47
  48 // --- AliRoot header files ---
  49 #include "AliRun.h"
  50 #include "AliMC.h"
  51 #include "AliConst.h"
  52 #include "AliLog.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    fCellId(0),
  64    fTrackPosition(),
  65    fTrackMomentum(),
  66    fLightYield(93.75),
  67    fLightAttenuation(0.05),
  68    fnMeters(15.0),
  69    fFibToPhot(0.3)
  70
  71 {
  72 // Standard default constructor
  73 }
  74
  75 //_____________________________________________________________________________
  76 AliVZEROv4::AliVZEROv4(const char *name, const char *title):
  77    AliVZERO(name,title),
  78    fCellId(0),
  79    fTrackPosition(),
  80    fTrackMomentum(),
  81    fLightYield(93.75),
  82    fLightAttenuation(0.05),
  83    fnMeters(15.0),
  84    fFibToPhot(0.3)
  85
  86 {
  87
  88 // Standard constructor for V-zero Detector  version 2
  89
  90   AliDebug(2,"Create VZERO object");
  91 //
  92 //   fLightYield              =  93.75; // Light yield in BC408 (93.75 eV per photon)
  93 //   fLightAttenuation        =   0.05; // Light attenuation in fiber (0.05 per meter)
  94 //   fnMeters                 =   15.0; // Number of meters of clear fibers to PM
  95 //   fFibToPhot               =    0.3; // Attenuation at fiber-photocathode interface
  96 }
  97
  98 //_____________________________________________________________________________
  99 void AliVZEROv4::CreateGeometry()
 100 {
 101
 102 // Creates the GEANT geometry of the V-zero Detector  version 3
 103
 104   AliDebug(2,"Create VZERO Geometry ");
 105
 106   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 107
 108   Int_t    ndetR = 1;
 109   Int_t    ndetL = 1;
 110
 111   Int_t    ncellsR = 1;
 112   Int_t    ncellsL = 1;
 113
 114   Int_t    idrotm[999];
 115
 116   Float_t  height1Right, height2Right, height3Right, height4Right;
 117   Float_t  heightRight;
 118   Float_t  theta;
 119
 120   Float_t  halfThickQua;
 121
 122   Float_t  zdet;
 123   Float_t  r0Right, r4Right;
 124   Float_t  pi = TMath::Pi();
 125
 126   height1Right    =     3.42;  // height of cell 1, in cm
 127   height2Right    =     6.78;  // height of cell 2, in cm
 128   height3Right    =     7.11;  // height of cell 3, in cm
 129   height4Right    =    10.91;  // height of cell 4, 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 + height4Right;
 143   r4Right     =    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 =   3.6;
 165   Float_t   height2Left =   6.4;
 166   Float_t   height3Left =  14.9;
 167   Float_t   height4Left =  14.4;
 168   Float_t   heightLeft  =   height1Left + height2Left + height3Left + height4Left;
 169
 170   Float_t   r4Left      =   r0Left  + heightLeft;
 171
 172   partubs[0]     =  r0Left;
 173   partubs[1]     =  r4Left;
 174   partubs[2]     =  fThickness1/2.0;
 175   partubs[3]     =  90.0-15.0;
 176   partubs[4]     = 120.0-15.0;
 177
 178   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 179
 180   Float_t  r1Left =  r0Left + height1Left;
 181
 182   partubs[0]     =  r0Left;
 183   partubs[1]     =  r1Left;
 184
 185   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 186   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 187
 188   Float_t  r2Left  =  r1Left + height2Left;
 189
 190   partubs[0]     =  r1Left;
 191   partubs[1]     =  r2Left;
 192
 193   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 194   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 195
 196   Float_t  r3Left  =  r2Left + height3Left;
 197
 198   partubs[0]     =  r2Left;
 199   partubs[1]     =  r3Left;
 200
 201   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 202   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 203
 204   partubs[0]     =  r3Left;
 205   partubs[1]     =  r4Left;
 206
 207   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 208   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 209
 210 // Creation of mother volume v0RI - right part - :
 211
 212   partube[0] = r0Right - 0.2;
 213   partube[1] = r4Right + 1.0;
 214   partube[2] = fThickness/2.0;
 215
 216   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 217
 218 // Creation of  carbon lids (3.5 mm thick) to keep v0RI box shut...
 219
 220   Float_t  lidThickness = 0.35;
 221
 222   partube[0] =   r0Right;
 223   partube[1] =   r4Right;
 224   partube[2] =   +lidThickness/2.0;
 225
 226   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 227   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 228   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 229
 230 // Creation of aluminum rings to maintain the v0RI pieces ...
 231
 232   partube[0] =   r0Right - 0.2;
 233   partube[1] =   r0Right;
 234   partube[2] =   +fThickness/2.0;
 235
 236   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 237   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 238
 239   partube[0] =   r4Right;
 240   partube[1] =   r4Right + 1.0;
 241   partube[2] =   +fThickness/2.0;
 242
 243   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 244   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 245
 246 // Mother volume v0R0 in which will be set 4  scintillator cells
 247
 248   partubs[0]      =  r0Right;
 249   partubs[1]      =  r4Right;
 250   partubs[2]      =  fThickness/2.0;
 251   partubs[3]      =  90.0-15.0;
 252   partubs[4]      = 120.0-15.0;
 253
 254   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 255
 256 // Elementary cell of ring 1 :
 257 // (cells of ring 1  will be shifted by 1.7 cm towards vertex to output fibers)
 258
 259   Float_t   offsetFibers  =  1.7;
 260   Float_t   offset        =  fThickness/2.0 - lidThickness - fThickness1/2.0;
 261   Float_t   r1Right       =  r0Right + height1Right;
 262
 263   partubs[0]     =  r0Right;
 264   partubs[1]     =  r1Right;
 265   partubs[2]     =  fThickness1/2.0;
 266
 267   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 268   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 269
 270 // Elementary cell of ring 2 :
 271
 272   Float_t   r2Right   =  r1Right + height2Right;
 273
 274   partubs[0]     =  r1Right;
 275   partubs[1]     =  r2Right;
 276
 277   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 278   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 279
 280
 281 // Elementary cell of ring 3 :
 282
 283   Float_t   r3Right   =  r2Right + height3Right;
 284
 285   partubs[0]     =  r2Right;
 286   partubs[1]     =  r3Right;
 287
 288   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 289   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 290
 291 // Elementary cell of ring 4 :
 292
 293   partubs[0]     =  r3Right;
 294   partubs[1]     =  r4Right;
 295
 296   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 297   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 298
 299   Float_t  phiDeg = 180./6.;
 300
 301 // Right part :
 302
 303   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 304       {
 305         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 306         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 307                           0.0,0.0,idrotm[902],"ONLY");
 308         ndetR++;
 309        }
 310
 311   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 312
 313   ncellsR = (ndetR - 1) * 4;
 314   AliInfo(Form("Number of cells on Right side =   %d",  ncellsR));
 315
 316 // Left part :
 317
 318   for(Float_t  phi = 15.0 ; phi < 360.0; phi = phi + phiDeg)
 319       {
 320         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 321         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 322                           0.0,0.0,idrotm[902],"ONLY");
 323         ndetL++;
 324        }
 325
 326   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 327
 328   ncellsL = (ndetL - 1) * 4;
 329   AliInfo(Form("Number of cells on Left side  =   %d",  ncellsL));
 330
 331 }
 332
 333 //_____________________________________________________________________________
 334 void AliVZEROv4::BuildGeometry()
 335 {
 336
 337 // Builds simple ROOT TNode geometry for event display
 338
 339   AliDebug(2,"VZERO BuildGeometry ");
 340
 341   TNode *top;
 342
 343   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 344   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3, *v0Rnode4;
 345   TNode *v0Lnode, *v0Lnode0;
 346   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3, *v0Lnode4;
 347
 348   const int kColorVZERO  = kGreen;
 349
 350   top = gAlice->GetGeometry()->GetNode("alice");
 351
 352   Float_t  height1Right, height2Right, height3Right, height4Right;
 353   Float_t  heightRight;
 354   Float_t  theta;
 355
 356   Float_t  halfThickQua;
 357   Float_t  zdet;
 358   Float_t  r0Right, r4Right;
 359   Float_t  pi = TMath::Pi();
 360
 361   height1Right      =     3.42;  // height of cell 1, in cm
 362   height2Right      =     6.78;  // height of cell 2, in cm
 363   height3Right      =     7.11;  // height of cell 3, in cm
 364   height4Right      =    10.91;  // height of cell 4, in cm
 365
 366   theta             =    pi/6.0/2.0;
 367
 368   halfThickQua      =    fThickness1/2.0;
 369
 370   zdet              =    90.0 - 0.6 - fThickness/2.0;
 371   r0Right           =    4.05;
 372   heightRight       =    height1Right + height2Right + height3Right + height4Right;
 373   r4Right           =    r0Right + heightRight;
 374
 375   Int_t     ndiv    =     1;
 376
 377   Float_t   partube[3];
 378
 379   partube[0] =  r0Right - 0.2;
 380   partube[1] =  r4Right + 1.0;
 381   partube[2] = fThickness/2.0;
 382
 383   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 384
 385   top->cd();
 386
 387   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 388
 389   v0Rnode->SetLineColor(kYellow);
 390   fNodes->Add(v0Rnode);
 391   v0Rnode->SetVisibility(2);
 392
 393 // Rondelles de carbone (epaisseur 3.5 mm) de maintien des cellules ...
 394
 395   Float_t  lidThickness = 0.35;
 396
 397   partube[0] =   r0Right;
 398   partube[1] =   r4Right;
 399   partube[2] =   +lidThickness/2.0;
 400
 401   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 402
 403   v0Rnode->cd();
 404   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 405   v0Rnode6->SetLineColor(kYellow);
 406   fNodes->Add(v0Rnode6);
 407   v0Rnode->cd();
 408   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 409   v0Rnode7->SetLineColor(kYellow);
 410   fNodes->Add(v0Rnode7);
 411
 412   partube[0] =   r0Right - 0.2;
 413   partube[1] =   r0Right;
 414   partube[2] =   +fThickness/2.0;
 415
 416   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 417
 418   v0Rnode->cd();
 419   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 420   v0Rnode8->SetLineColor(kYellow);
 421   fNodes->Add(v0Rnode8);
 422
 423   partube[0] =   r4Right;
 424   partube[1] =   r4Right + 1.0;
 425   partube[2] =   +fThickness/2.0;
 426
 427   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 428
 429   v0Rnode->cd();
 430   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 431   v0Rnode9->SetLineColor(kYellow);
 432   fNodes->Add(v0Rnode9);
 433
 434   Float_t   partubs[5];
 435
 436   partubs[0]      =  r0Right;
 437   partubs[1]      =  r4Right;
 438   partubs[2]      =  fThickness/2.0;
 439   partubs[3]      =  90.0-15.0;
 440   partubs[4]      = 120.0-15.0;
 441
 442   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 443                                                   partubs[3], partubs[4]);
 444
 445   v0R0->SetNumberOfDivisions(ndiv);
 446
 447   Float_t   r1Right =  r0Right + height1Right;
 448   Float_t   offset  = fThickness/2.0 - lidThickness - fThickness1/2.0;
 449   Float_t   offsetFibers = 1.7;
 450
 451   partubs[0]     =  r0Right;
 452   partubs[1]     =  r1Right;
 453   partubs[2]     =  fThickness1/2.0;
 454
 455   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 456                                                   partubs[3], partubs[4]);
 457
 458   v0R1->SetNumberOfDivisions(ndiv);
 459
 460   Float_t   r2Right  =  r1Right + height2Right;
 461
 462   partubs[0]     =  r1Right;
 463   partubs[1]     =  r2Right;
 464
 465   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 466                                                   partubs[3], partubs[4]);
 467
 468   v0R2->SetNumberOfDivisions(ndiv);
 469
 470   Float_t   r3Right  =  r2Right + height3Right;
 471
 472   partubs[0]     =  r2Right;
 473   partubs[1]     =  r3Right;
 474
 475   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 476                                                   partubs[3], partubs[4]);
 477   v0R3->SetNumberOfDivisions(ndiv);
 478
 479   partubs[0]     =  r3Right;
 480   partubs[1]     =  r4Right;
 481
 482   TTUBS *v0R4 = new TTUBS("V0R4", "V0R4", "void", partubs[0], partubs[1], partubs[2],
 483                                                   partubs[3], partubs[4]);
 484   v0R4->SetNumberOfDivisions(ndiv);
 485
 486   Float_t  phi;
 487   Float_t  phiDeg= 180./6.;
 488
 489   Int_t    ndetR = 1;
 490
 491   char     nameNode[12];
 492
 493   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 494
 495   {
 496     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 497
 498     sprintf(nameNode,"SUBDER%d",ndetR);
 499
 500     v0Rnode->cd();
 501     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 502     v0Rnode0->SetLineColor(kYellow);
 503     fNodes->Add(v0Rnode0);
 504     ndetR++;
 505
 506     sprintf(nameNode,"SUBDER%d",ndetR);
 507     v0Rnode0->cd();
 508     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset+ offsetFibers ,0);
 509     v0Rnode1->SetLineColor(kColorVZERO);
 510     fNodes->Add(v0Rnode1);
 511     ndetR++;
 512
 513     sprintf(nameNode,"SUBDER%d",ndetR);
 514     v0Rnode0->cd();
 515     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset,0);
 516     v0Rnode2->SetLineColor(kColorVZERO);
 517     fNodes->Add(v0Rnode2);
 518     ndetR++;
 519
 520     sprintf(nameNode,"SUBDER%d",ndetR);
 521     v0Rnode0->cd();
 522     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset,0);
 523     v0Rnode3->SetLineColor(kColorVZERO);
 524     fNodes->Add(v0Rnode3);
 525     ndetR++;
 526
 527     sprintf(nameNode,"SUBDER%d",ndetR);
 528     v0Rnode0->cd();
 529     v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset,0);
 530     v0Rnode4->SetLineColor(kColorVZERO);
 531     fNodes->Add(v0Rnode4);
 532     ndetR++;
 533
 534     v0Rnode0->SetVisibility(2);
 535   }
 536
 537 // Left side of VZERO :
 538
 539   Float_t   r0Left      =    4.3;
 540   Float_t   height1Left =    3.6;
 541   Float_t   height2Left =    6.4;
 542   Float_t   height3Left =   14.9;
 543   Float_t   height4Left =   14.4;
 544   Float_t   heightLeft  = height1Left + height2Left + height3Left + height4Left;
 545
 546   Float_t   r4Left      = r0Left  + heightLeft;
 547
 548   partube[0] =  r0Left;
 549   partube[1] =  r4Left;
 550   partube[2] =  fThickness1/2.0;
 551
 552   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 553
 554   top->cd();
 555
 556   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 557
 558   v0Lnode->SetLineColor(kBlue);
 559   fNodes->Add(v0Lnode);
 560
 561   v0Lnode->SetVisibility(2);
 562
 563   partubs[0]      =  r0Left;
 564   partubs[1]      =  r4Left;
 565   partubs[2]      =  fThickness1/2.0;
 566   partubs[3]      =  90.0-15.0;
 567   partubs[4]      = 120.0-15.0;
 568
 569   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 570                                                   partubs[3], partubs[4]);
 571
 572   v0L0->SetNumberOfDivisions(ndiv);
 573   v0L0->SetLineColor(7);
 574
 575   Float_t   offsetLeft;
 576   offsetLeft    = - fThickness1/2.0;
 577
 578   Float_t   r1Left =  r0Left + height1Left;
 579
 580   partubs[0]     =  r0Left;
 581   partubs[1]     =  r1Left;
 582
 583   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 584                                                   partubs[3], partubs[4]);
 585   v0L1->SetNumberOfDivisions(ndiv);
 586
 587   Float_t   r2Left =  r1Left + height2Left;
 588
 589   partubs[0]     =  r1Left;
 590   partubs[1]     =  r2Left;
 591
 592   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 593                                                   partubs[3], partubs[4]);
 594   v0L2->SetNumberOfDivisions(ndiv);
 595
 596   Float_t   r3Left =  r2Left + height3Left;
 597
 598   partubs[0]     =  r2Left;
 599   partubs[1]     =  r3Left;
 600
 601   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 602                                                   partubs[3], partubs[4]);
 603   v0L3->SetNumberOfDivisions(ndiv);
 604
 605   partubs[0]     =  r3Left;
 606   partubs[1]     =  r4Left;
 607
 608   TTUBS *v0L4 = new TTUBS("V0L4", "V0L4", "void", partubs[0], partubs[1], partubs[2],
 609                                                   partubs[3], partubs[4]);
 610   v0L4->SetNumberOfDivisions(ndiv);
 611
 612   Int_t    ndetL   = 1;
 613
 614   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 615
 616   {
 617
 618     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 619
 620     sprintf(nameNode,"SUBDEL%d",ndetL);
 621
 622     v0Lnode->cd();
 623     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offsetLeft + halfThickQua,mat920);
 624     v0Lnode0->SetLineColor(kColorVZERO);
 625     fNodes->Add(v0Lnode0);
 626     ndetL++;
 627
 628     sprintf(nameNode,"SUBDEL%d",ndetL);
 629     v0Lnode0->cd();
 630     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 631     v0Lnode1->SetLineColor(kColorVZERO);
 632     fNodes->Add(v0Lnode1);
 633     ndetL++;
 634
 635     sprintf(nameNode,"SUBDEL%d",ndetL);
 636     v0Lnode0->cd();
 637     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 638     v0Lnode2->SetLineColor(kColorVZERO);
 639     fNodes->Add(v0Lnode2);
 640     ndetL++;
 641
 642     sprintf(nameNode,"SUBDEL%d",ndetL);
 643     v0Lnode0->cd();
 644     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 645     v0Lnode3->SetLineColor(kColorVZERO);
 646     fNodes->Add(v0Lnode3);
 647     ndetL++;
 648
 649     sprintf(nameNode,"SUBDEL%d",ndetL);
 650     v0Lnode0->cd();
 651     v0Lnode4 = new TNode(nameNode,nameNode,v0L4,0.0,0.0, 0.0,0);
 652     v0Lnode4->SetLineColor(kColorVZERO);
 653     fNodes->Add(v0Lnode4);
 654     ndetL++;
 655
 656     v0Lnode0->SetVisibility(2);
 657   }
 658 }
 659
 660 //_____________________________________________________________________________
 661 void AliVZEROv4::CreateMaterials()
 662 {
 663
 664 // Creates materials used for geometry
 665
 666     AliDebug(2,"VZERO create materials");
 667
 668 /*
 669     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,
 670                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 671
 672
 673     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,
 674                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 675
 676     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 677                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 678                                  1.662295, 1.68337 };
 679
 680     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 681                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 682
 683     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 684
 685
 686     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 687
 688
 689     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,
 690                                1e-4,1e-4,1e-4,1e-4 };
 691     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 692
 693 */
 694
 695     Int_t *idtmed = fIdtmed->GetArray()-2999;
 696
 697
 698 //  Parameters related to Quarz (SiO2) :
 699
 700     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 701     Int_t nlmatqua;
 702
 703     aqua[0]    = 28.09;
 704     aqua[1]    = 16.;
 705     zqua[0]    = 14.;
 706     zqua[1]    = 8.;
 707     densqua    = 2.64;
 708     nlmatqua   = -2;
 709     wmatqua[0] = 1.;
 710     wmatqua[1] = 2.;
 711
 712 // Parameters  related to aluminum sheets :
 713
 714     Float_t  aal   = 26.98;
 715     Float_t  zal   = 13.00;
 716     Float_t  densal=   2.7;
 717     Float_t  radlal=   8.9;
 718
 719 // Parameters  related to scintillator CH :
 720
 721     Float_t ascin[2] = {1.00794,12.011};
 722     Float_t zscin[2] = {1.,6.};
 723     Float_t wscin[2] = {1.,1.};
 724     Float_t denscin  = 1.032;
 725
 726 // AIR
 727
 728     Float_t aAir[4]={12.,14.,16.,36.};
 729     Float_t zAir[4]={6.,7.,8.,18.};
 730     Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 731     Float_t dAir = 1.20479E-3;
 732
 733 //  Definition of materials :
 734
 735 // AIR
 736
 737     AliMixture( 1, "AIR A$", aAir,zAir,dAir,4,wAir);
 738     AliMixture(11, "AIR I$", aAir,zAir,dAir,4,wAir);
 739     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 740     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 741     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 742     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 743
 744     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 745
 746
 747     Int_t   iSXFLD = gAlice->Field()->Integ();
 748     Float_t sXMGMX = gAlice->Field()->Max();
 749
 750     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 751
 752     tmaxfd = 10.;
 753     stemax = 0.1;
 754     deemax = 0.1;
 755     epsil  = 0.001;
 756     stmin  = 0.001;
 757
 758 //  Active Air :
 759     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 760               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 761
 762 //  Inactive air :
 763
 764     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 765               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 766
 767     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 768               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 769
 770     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 771               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 772
 773     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 774               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 775
 776
 777     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 778               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 779
 780     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 781
 782     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 783     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 784     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 785     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 786
 787     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 788     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 789     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 790     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 791
 792     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 793     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 794     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 795     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 796     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 797     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 798
 799     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 800     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 801     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 802     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 803
 804     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 805     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 806     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 807     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 808     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 809     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 810
 811     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 812     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 813     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 814     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 815     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 816     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 817
 818
 819 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 820 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 821
 822 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 823 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 824
 825 }
 826
 827 //_____________________________________________________________________________
 828 void AliVZEROv4::DrawModule() const
 829 {
 830
 831 //  Drawing is done in DrawVZERO.C
 832
 833    AliDebug(2,"VZERO DrawModule");
 834 }
 835
 836 //_____________________________________________________________________________
 837 void AliVZEROv4::Init()
 838 {
 839 // Initialises version 2 of the VZERO Detector
 840 // Just prints an information message
 841
 842   AliDebug(2,Form("VZERO version %d initialized",IsVersion()));
 843
 844 //   gMC->SetMaxStep(fMaxStepAlu);
 845 //   gMC->SetMaxStep(fMaxStepQua);
 846
 847     AliVZERO::Init();
 848 }
 849
 850 //_____________________________________________________________________________
 851 void AliVZEROv4::StepManager()
 852 {
 853
 854 // Step Manager, called at each step
 855
 856      Int_t     copy;
 857      static    Int_t   vol[4];
 858      static    Float_t hits[21];
 859      static    Float_t eloss, tlength;
 860      static    Int_t   nPhotonsInStep;
 861      static    Int_t   nPhotons;
 862      static    Int_t   numStep;
 863      Float_t   ringNumber;
 864      Float_t   destep, step;
 865
 866      numStep += 1;
 867
 868 //   We keep only charged tracks :
 869
 870      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 871
 872      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 873      vol[2]    = gMC->CurrentVolID(copy);
 874      vol[3]    = copy;
 875
 876      static Int_t idV0R1 = gMC->VolId("V0R1");
 877      static Int_t idV0L1 = gMC->VolId("V0L1");
 878      static Int_t idV0R2 = gMC->VolId("V0R2");
 879      static Int_t idV0L2 = gMC->VolId("V0L2");
 880      static Int_t idV0R3 = gMC->VolId("V0R3");
 881      static Int_t idV0L3 = gMC->VolId("V0L3");
 882      static Int_t idV0R4 = gMC->VolId("V0R4");
 883      static Int_t idV0L4 = gMC->VolId("V0L4");
 884
 885      if      ( gMC->CurrentVolID(copy) == idV0R1 ||
 886                gMC->CurrentVolID(copy) == idV0L1 )
 887                ringNumber = 1.0;
 888      else if ( gMC->CurrentVolID(copy) == idV0R2 ||
 889                gMC->CurrentVolID(copy) == idV0L2 )
 890                ringNumber = 2.0;
 891      else if ( gMC->CurrentVolID(copy) == idV0R3 ||
 892                gMC->CurrentVolID(copy) == idV0L3 )
 893                ringNumber = 3.0;
 894      else if ( gMC->CurrentVolID(copy) == idV0R4 ||
 895                gMC->CurrentVolID(copy) == idV0L4 )
 896                ringNumber = 4.0;
 897      else
 898                ringNumber = 0.0;
 899
 900      if  (  ringNumber > 0.5  ) {
 901
 902         destep    = gMC->Edep();
 903         step      = gMC->TrackStep();
 904
 905         nPhotonsInStep  = Int_t(destep / (fLightYield *1e-9) );
 906         nPhotonsInStep  = gRandom->Poisson(nPhotonsInStep);
 907
 908         eloss    += destep;
 909         tlength  += step;
 910
 911         if  ( gMC->IsTrackEntering()  )  {
 912
 913             nPhotons  =  nPhotonsInStep;
 914             gMC->TrackPosition(fTrackPosition);
 915             gMC->TrackMomentum(fTrackMomentum);
 916
 917             Float_t pt  = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
 918                                        fTrackMomentum.Py() * fTrackMomentum.Py() );
 919
 920             hits[0]  = fTrackPosition.X();
 921             hits[1]  = fTrackPosition.Y();
 922             hits[2]  = fTrackPosition.Z();
 923             hits[3]  = Float_t (gMC->TrackPid());
 924
 925             hits[4]  = gMC->TrackTime();
 926             hits[5]  = gMC->TrackCharge();
 927             hits[6]  = fTrackMomentum.Theta()*TMath::RadToDeg();
 928             hits[7]  = fTrackMomentum.Phi()*TMath::RadToDeg();
 929             hits[8]  = ringNumber;
 930
 931             hits[9]  = pt;
 932             hits[10] = fTrackMomentum.P();
 933             hits[11] = fTrackMomentum.Px();
 934             hits[12] = fTrackMomentum.Py();
 935             hits[13] = fTrackMomentum.Pz();
 936
 937             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
 938             hits[14] = par->Vx();
 939             hits[15] = par->Vy();
 940             hits[16] = par->Vz();
 941
 942             tlength  = 0.0;
 943             eloss    = 0.0;
 944          }
 945
 946          nPhotons  = nPhotons + nPhotonsInStep;
 947
 948          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
 949
 950          nPhotons  = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
 951          nPhotons  = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
 952
 953          hits[17] =   eloss;
 954          hits[18] = tlength;
 955          hits[19] = nPhotons;
 956          hits[20] = GetCellId (vol, hits);
 957
 958          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
 959
 960          tlength         = 0.0;
 961          eloss           = 0.0;
 962          nPhotons        =   0;
 963          nPhotonsInStep  =   0;
 964
 965          numStep         =   0;
 966          }
 967     }
 968
 969 }
 970
 971 //_____________________________________________________________________________
 972 void AliVZEROv4::AddHit(Int_t track, Int_t *vol, Float_t *hits)
 973 {
 974
 975 //  Adds a VZERO hit
 976
 977   TClonesArray &lhits = *fHits;
 978   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
 979 }
 980
 981 //_____________________________________________________________________________
 982 void AliVZEROv4::AddDigits(Int_t *tracks, Int_t* digits)
 983 {
 984
 985 //  Adds a VZERO digit
 986
 987    TClonesArray  &ldigits = *fDigits;
 988    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
 989 }
 990
 991 //_____________________________________________________________________________
 992 void AliVZEROv4::MakeBranch(Option_t *option)
 993 {
 994
 995 // Creates new branches in the current Root Tree
 996
 997   char branchname[10];
 998   sprintf(branchname,"%s",GetName());
 999   AliDebug(2,Form("fBufferSize = %d",fBufferSize));
1000
1001   const char *cH = strstr(option,"H");
1002
1003   if (fHits   && TreeH() && cH) {
1004     TreeH()->Branch(branchname,&fHits, fBufferSize);
1005     AliDebug(2,Form("Making Branch %s for hits",branchname));
1006   }
1007
1008   const char *cD = strstr(option,"D");
1009
1010   if (fDigits   && fLoader->TreeD() && cD) {
1011     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1012     AliDebug(2,Form("Making Branch %s for digits",branchname));
1013   }
1014
1015 }
1016
1017 //_____________________________________________________________________________
1018 Int_t AliVZEROv4::GetCellId(Int_t *vol, Float_t *hits)
1019 {
1020
1021   //   Returns Id of scintillator cell
1022   //   Right side from  0 to 47
1023   //   Left  side from 48 to 95
1024
1025    Int_t index = vol[1];
1026    fCellId     = 0;
1027
1028    if (index < 10) index = index + 12;
1029
1030    if (hits[2] < 0.0) {
1031       index = (index - 10) + ( ( Int_t(hits[8]) - 1 ) * 12);
1032       fCellId   = index;
1033    }
1034    else if (hits[2] > 0.0)
1035    {
1036       index = (index + 38) + ( ( Int_t(hits[8]) - 1 ) * 12);
1037       fCellId   = index;}
1038
1039    return fCellId;
1040 }