VZERO/AliVZEROv2.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 2  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 november 2002                          //
  24 //  (circular instead of trapezoidal shapes as in previous versions //
  25 //   plus changes in cell dimensions and offsets)                   //
  26 //   New coordinate system implemented in october 2003              //
  27 //                                                                  //
  28 //////////////////////////////////////////////////////////////////////
  29
  30 // --- Standard libraries ---
  31 #include <Riostream.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 // --- ROOT libraries ---
  36 #include <TClonesArray.h>
  37 #include <TGeant3.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 "AliConst.h"
  50 #include "AliMagF.h"
  51 #include "AliVZEROLoader.h"
  52 #include "AliVZEROdigit.h"
  53 #include "AliVZEROhit.h"
  54 #include "AliVZEROv2.h"
  55 #include "AliMC.h"
  56
  57 ClassImp(AliVZEROv2)
  58
  59 //--------------------------------------------------------------------
  60 AliVZEROv2:: AliVZEROv2():AliVZERO()
  61 {
  62 // Standard default constructor
  63 }
  64 //--------------------------------------------------------------------
  65 AliVZEROv2::AliVZEROv2(const char *name, const char *title):
  66  AliVZERO(name,title)
  67 {
  68
  69 // Standard constructor for V-zero Detector  version 2
  70
  71   Int_t i;
  72
  73   printf("\n");
  74   for(i=0;i<26;i++) printf("*");
  75   printf(" Create VZERO object ");
  76   for(i=0;i<26;i++) printf("*");
  77   printf("\n");
  78
  79 }
  80
  81 //-------------------------------------------------------------------------
  82 void AliVZEROv2::CreateGeometry()
  83 {
  84
  85 // Creates the GEANT geometry of the V-zero Detector  version 2
  86
  87   Int_t i;
  88
  89   printf("\n");
  90   for(i=0;i<26;i++) printf("*");
  91   printf(" Create VZERO Geometry ");
  92   for(i=0;i<26;i++) printf("*");
  93   printf("\n");
  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  height1, height2, height3, height4, height5;
 106   Float_t  height;
 107   Float_t  theta;
 108
 109   Float_t  halfThickQua;
 110
 111   Float_t  zdet;
 112   Float_t  r0, r5;
 113   Float_t  pi = TMath::Pi();
 114
 115   height1           =     1.82;           // height of cell 1, in cm
 116   height2           =     3.81;           // height of cell 2, in cm
 117   height3           =     4.72;           // height of cell 3, in cm
 118   height4           =     7.12;           // height of cell 4, in cm
 119   height5           =    10.83;           // height of cell 5, in cm
 120
 121   theta             = pi/6.0/2.0;       // half angular opening = 15 degrees
 122
 123   halfThickQua    = fThickness1/2.0;   // half thickness of elementary cell (inner ring)
 124
 125   zdet              =    90.0 - 0.6 -fThickness/2.0;  // distance to vertex (along Z axis)
 126   r0                =    4.05;            // closest distance to center of the beam pipe
 127   height            =    height1 + height2 + height3 + height4 + height5;
 128   r5                =    r0 + height;
 129
 130 // Creation of mother volume v0LE - left part - :
 131 // Entrance face at  +350.0 cm  (new coordinate system) ...
 132
 133    Float_t   partube[3];
 134
 135    partube[0] =  4.3;
 136    partube[1] = 45.0;
 137    partube[2] = fThickness1/2.0;
 138
 139    gMC->Gsvolu("V0LE","TUBE",idtmed[3005],partube,3);
 140
 141 // Creation of five rings - left part - :
 142 // Entrance face at +350.0 cm  (new coordinate system) ...
 143
 144 // Mother volume v0L0 in which will be set 5 scintillator cells
 145
 146   Float_t   partubs[5];
 147
 148   Float_t   r0Left      =   4.3;
 149   Float_t   height1Left =   2.6;
 150   Float_t   height2Left =   4.1;
 151   Float_t   height3Left =   6.4;
 152   Float_t   height4Left =  10.2;
 153   Float_t   height5Left =  16.9;
 154   Float_t   heightLeft  = height1Left + height2Left + height3Left
 155                                       + height4Left + height5Left;
 156   Float_t   r5Left      = r0Left  + heightLeft;
 157
 158   partubs[0]      =  r0Left;
 159   partubs[1]      =  r5Left;
 160   partubs[2]      =  fThickness1/2.0;
 161   partubs[3]      =  90.0-15.0;
 162   partubs[4]      = 120.0-15.0;
 163
 164   gMC->Gsvolu("V0L0","TUBS",idtmed[3010],partubs,5);  // air volume
 165
 166   Float_t  r1Left =  r0Left + height1Left;
 167
 168   partubs[0]     =  r0Left;
 169   partubs[1]     =  r1Left;
 170
 171   gMC->Gsvolu("V0L1","TUBS",idtmed[3005],partubs,5);  // quartz volume
 172   gMC->Gspos("V0L1",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 173
 174   Float_t   r2Left  =   r1Left + height2Left;
 175
 176   partubs[0]     =  r1Left;
 177   partubs[1]     =  r2Left;
 178
 179   gMC->Gsvolu("V0L2","TUBS",idtmed[3005],partubs,5);  // quartz volume
 180   gMC->Gspos("V0L2",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 181
 182   Float_t   r3Left =   r2Left + height3Left;
 183
 184   partubs[0]     =  r2Left;
 185   partubs[1]     =  r3Left;
 186
 187   gMC->Gsvolu("V0L3","TUBS",idtmed[3005],partubs,5);  // quartz volume
 188   gMC->Gspos("V0L3",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 189
 190   Float_t   r4Left =  r3Left + height4Left;
 191
 192   partubs[0]     =  r3Left;
 193   partubs[1]     =  r4Left;
 194
 195   gMC->Gsvolu("V0L4","TUBS",idtmed[3005],partubs,5);  // quartz volume
 196   gMC->Gspos("V0L4",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 197
 198   partubs[0]     =  r4Left;
 199   partubs[1]     =  r5Left;
 200   partubs[3]     =  90.0-15.0;
 201   partubs[4]     = 120.0-30.0;
 202
 203   gMC->Gsvolu("V0L5","TUBS",idtmed[3005],partubs,5);  // quartz volume
 204   gMC->Gspos("V0L5",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 205
 206   partubs[3]     = 120.0-30.0;
 207   partubs[4]     = 120.0-15.0;
 208
 209   gMC->Gsvolu("V0L6","TUBS",idtmed[3005],partubs,5);  // quartz volume
 210   gMC->Gspos("V0L6",1,"V0L0", 0.0, 0.0 , 0.0, 0,"ONLY");
 211
 212
 213 // Creation of mother volume v0RI - right part - :
 214
 215   partube[0] = r0 - 0.2;
 216   partube[1] = r5 + 1.0;
 217   partube[2] = fThickness/2.0;
 218
 219   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 220
 221 // Creation of  carbon lids (3 mm thick) to keep v0RI box shut...
 222
 223   partube[0] =   r0;
 224   partube[1] =   r5;
 225   partube[2] =   +0.3/2.0;
 226
 227   gMC->Gsvolu("V0CA","TUBE",idtmed[3001],partube,3);
 228   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-partube[2],0,"ONLY");
 229   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+partube[2],0,"ONLY");
 230
 231 // Creation of aluminum rings to maintain the v0RI pieces ...
 232
 233   partube[0] =   r0 - 0.2;
 234   partube[1] =   r0;
 235   partube[2] =   +fThickness/2.0;
 236
 237   gMC->Gsvolu("V0IR","TUBE",idtmed[3003],partube,3);
 238   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 239
 240   partube[0] =   r5;
 241   partube[1] =   r5 + 1.0;
 242   partube[2] =   +fThickness/2.0;
 243
 244   gMC->Gsvolu("V0ER","TUBE",idtmed[3003],partube,3);
 245   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 246
 247 // Mother volume v0R0 in which will be set 5  scintillator cells
 248
 249   partubs[0]      =  r0;
 250   partubs[1]      =  r5;
 251   partubs[2]      =  fThickness/2.0;
 252   partubs[3]      =  90.0-15.0;
 253   partubs[4]      = 120.0-15.0;
 254
 255   gMC->Gsvolu("V0R0","TUBS",idtmed[3010],partubs,5);  // air volume
 256
 257 // Elementary cell of ring 1 :
 258 // (the cells will be shifted by 3 mm to output fibers)
 259
 260   Float_t   offsetFibers =  0.7;
 261   Float_t   offset        =  fThickness/2.0 - 0.3 - fThickness1/2.0;
 262   Float_t   r1            =  r0 + height1;
 263
 264   partubs[0]     =  r0;
 265   partubs[1]     =  r1;
 266   partubs[2]     =  fThickness1/2.0;
 267
 268   gMC->Gsvolu("V0R1","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 269   gMC->Gspos("V0R1",1,"V0R0", 0.0, 0.0 , -offset, 0,"ONLY");
 270
 271 // Elementary cell of ring 2 :
 272
 273   Float_t   r2   =  r1 + height2;
 274
 275   partubs[0]     =  r1;
 276   partubs[1]     =  r2;
 277
 278   gMC->Gsvolu("V0R2","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 279   gMC->Gspos("V0R2",1,"V0R0", 0.0, 0.0 , -offset + offsetFibers, 0,"ONLY");
 280
 281
 282 // Elementary cell of ring 3 :
 283
 284   Float_t   r3   =  r2 + height3;
 285
 286   partubs[0]     =  r2;
 287   partubs[1]     =  r3;
 288
 289   gMC->Gsvolu("V0R3","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 290   gMC->Gspos("V0R3",1,"V0R0", 0.0, 0.0 , -offset + 2.0 * offsetFibers, 0,"ONLY");
 291
 292 // Elementary cell of ring 4 :
 293
 294   Float_t   r4   =  r3 + height4 ;
 295
 296   partubs[0]     =  r3;
 297   partubs[1]     =  r4;
 298
 299   gMC->Gsvolu("V0R4","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 300   gMC->Gspos("V0R4",1,"V0R0", 0.0, 0.0 ,  -offset + 3.0 * offsetFibers, 0,"ONLY");
 301
 302 // Elementary cells of ring 5 :
 303
 304   partubs[0]     =  r4;
 305   partubs[1]     =  r5;
 306   partubs[3]     =  90.0-15.0;
 307   partubs[4]     = 120.0-30.0;
 308
 309   gMC->Gsvolu("V0R5","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 310   gMC->Gspos("V0R5",1,"V0R0", 0.0, 0.0 , -offset + 4.0 * offsetFibers, 0,"ONLY");
 311
 312   partubs[3]     = 120.0-30.0;
 313   partubs[4]     = 120.0-15.0;
 314
 315   gMC->Gsvolu("V0R6","TUBS",idtmed[3005],partubs,5);  // scintillator volume
 316   gMC->Gspos("V0R6",1,"V0R0", 0.0, 0.0 ,  -offset + 4.0 * offsetFibers, 0,"ONLY");
 317
 318   Float_t  phiDeg = 180./6.;
 319
 320 // Right part :
 321
 322   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 323       {
 324         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 325         gMC->Gspos("V0R0",ndetR,"V0RI",0.0,
 326                           0.0,0.0,idrotm[902],"ONLY");
 327         ndetR++;
 328        }
 329
 330   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,-zdet,0,"ONLY");
 331
 332   ncellsR = (ndetR - 1) * 6;
 333   printf("    Number of cells on Right side =   %d\n",  ncellsR);
 334
 335 // Left part :
 336
 337   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 338       {
 339         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 340         gMC->Gspos("V0L0",ndetL,"V0LE",0.0,
 341                           0.0,0.0,idrotm[902],"ONLY");
 342         ndetL++;
 343        }
 344
 345   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,350.0+fThickness1/2.0,0,"ONLY");
 346
 347   ncellsL = (ndetL - 1) * 6;
 348   printf("    Number of cells on Left side  =   %d\n",  ncellsL);
 349   for(i=0;i<75;i++) printf("*");
 350   printf("\n");
 351
 352 }
 353
 354 //_____________________________________________________________________________
 355 void AliVZEROv2::BuildGeometry()
 356 {
 357
 358 // Builds simple ROOT TNode geometry for event display
 359
 360   Int_t i;
 361
 362   printf("\n");
 363   for(i=0;i<30;i++) printf("*");
 364   printf(" VZERO BuildGeometry ");
 365   for(i=0;i<30;i++) printf("*");
 366   printf("\n");
 367
 368   TNode *top;
 369
 370   TNode *v0Rnode, *v0Rnode0, *v0Rnode6 , *v0Rnode7, *v0Rnode8, *v0Rnode9;
 371   TNode *v0Rnode1, *v0Rnode2, *v0Rnode3, *v0Rnode4, *v0Rnode5;
 372   TNode *v0Lnode, *v0Lnode0;
 373   TNode *v0Lnode1, *v0Lnode2, *v0Lnode3, *v0Lnode4, *v0Lnode5, *v0Lnode6;
 374
 375   const int kColorVZERO  = kGreen;
 376
 377   top = gAlice->GetGeometry()->GetNode("alice");
 378
 379   Float_t  height1, height2, height3, height4, height5;
 380   Float_t  height;
 381   Float_t  theta;
 382
 383   Float_t  halfThickQua;
 384   Float_t  zdet;
 385   Float_t  r0, r5;
 386   Float_t  pi = TMath::Pi();
 387
 388   height1           =     1.82;           // height of cell 1, in cm
 389   height2           =     3.81;           // height of cell 2, in cm
 390   height3           =     4.72;           // height of cell 3, in cm
 391   height4           =     7.12;           // height of cell 4, in cm
 392   height5           =    10.83;           // height of cell 5, in cm
 393
 394   theta             =    pi/6.0/2.0;
 395
 396   halfThickQua    =    fThickness1/2.0;
 397
 398   zdet              =    90.0 - 0.6 - fThickness/2.0;
 399   r0                =    4.05;
 400   height            =    height1 + height2 + height3 + height4 + height5;
 401   r5                =    r0 + height;
 402
 403   Int_t     ndiv    =     1;
 404
 405   Float_t   partube[3];
 406
 407   partube[0] =  r0 - 0.2;
 408   partube[1] =  r5 + 1.0;
 409   partube[2] = fThickness/2.0;
 410
 411   TTUBE *v0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 412
 413   top->cd();
 414
 415   v0Rnode = new TNode("V0RI","V0RI",v0RI,0.0,0.0,-zdet,0);
 416
 417   v0Rnode->SetLineColor(kYellow);
 418   fNodes->Add(v0Rnode);
 419   v0Rnode->SetVisibility(2);
 420
 421 // Rondelles de carbone (epaisseur 3 mm) de maintien des cellules ...
 422
 423   partube[0] =   r0;
 424   partube[1] =   r5;
 425   partube[2] =   +0.3/2.0;
 426
 427   TTUBE  *v0CA = new TTUBE("V0CA", "V0CA", "void",partube[0], partube[1], partube[2]);
 428
 429   v0Rnode->cd();
 430   v0Rnode6 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0, fThickness/2.0-partube[2],0);
 431   v0Rnode6->SetLineColor(kYellow);
 432   fNodes->Add(v0Rnode6);
 433   v0Rnode->cd();
 434   v0Rnode7 = new TNode("V0CA", "V0CA",v0CA,0.0,0.0,-fThickness/2.0+partube[2],0);
 435   v0Rnode7->SetLineColor(kYellow);
 436   fNodes->Add(v0Rnode7);
 437
 438   partube[0] =   r0 - 0.2;
 439   partube[1] =   r0;
 440   partube[2] =   +fThickness/2.0;
 441
 442   TTUBE *v0IR = new TTUBE("V0IR","V0IR","void", partube[0], partube[1], partube[2]);
 443
 444   v0Rnode->cd();
 445   v0Rnode8 = new TNode("V0IR", "V0IR",v0IR,0.0,0.0,0.0,0);
 446   v0Rnode8->SetLineColor(kYellow);
 447   fNodes->Add(v0Rnode8);
 448
 449   partube[0] =   r5;
 450   partube[1] =   r5 + 1.0;
 451   partube[2] =   +fThickness/2.0;
 452
 453   TTUBE  *v0ER = new TTUBE("V0ER","V0ER","void", partube[0], partube[1], partube[2]);
 454
 455   v0Rnode->cd();
 456   v0Rnode9 = new TNode("V0ER", "V0ER",v0ER,0.0,0.0,0.0,0);
 457   v0Rnode9->SetLineColor(kYellow);
 458   fNodes->Add(v0Rnode9);
 459
 460   Float_t   partubs[5];
 461
 462   partubs[0]      =  r0;
 463   partubs[1]      =  r5;
 464   partubs[2]      =  fThickness/2.0;
 465   partubs[3]      =  90.0-15.0;
 466   partubs[4]      = 120.0-15.0;
 467
 468   TTUBS  *v0R0 = new TTUBS("V0R0", "V0R0", "void",partubs[0], partubs[1], partubs[2],
 469                                                   partubs[3], partubs[4]);
 470
 471   v0R0->SetNumberOfDivisions(ndiv);
 472
 473   Float_t   r1     =  r0 + height1;
 474   Float_t   offset = fThickness/2.0 - 0.3 - fThickness1/2.0;
 475   Float_t   offsetFibers = 0.7;
 476
 477   partubs[0]     =  r0;
 478   partubs[1]     =  r1;
 479   partubs[2]     =  fThickness1/2.0;
 480
 481   TTUBS *v0R1 = new TTUBS("V0R1", "V0R1", "void", partubs[0], partubs[1], partubs[2],
 482                                                   partubs[3], partubs[4]);
 483
 484   v0R1->SetNumberOfDivisions(ndiv);
 485
 486   Float_t   r2   =  r1 + height2;
 487
 488   partubs[0]     =  r1;
 489   partubs[1]     =  r2;
 490
 491   TTUBS *v0R2 = new TTUBS("V0R2", "V0R2", "void", partubs[0], partubs[1], partubs[2],
 492                                                   partubs[3], partubs[4]);
 493
 494   v0R2->SetNumberOfDivisions(ndiv);
 495
 496   Float_t   r3   =  r2 + height3;
 497
 498   partubs[0]     =  r2;
 499   partubs[1]     =  r3;
 500
 501   TTUBS *v0R3 = new TTUBS("V0R3", "V0R3", "void", partubs[0], partubs[1], partubs[2],
 502                                                   partubs[3], partubs[4]);
 503   v0R3->SetNumberOfDivisions(ndiv);
 504
 505   Float_t   r4   =  r3 + height4;
 506
 507   partubs[0]     =  r3;
 508   partubs[1]     =  r4;
 509
 510   TTUBS *v0R4 = new TTUBS("V0R4", "V0R4", "void", partubs[0], partubs[1], partubs[2],
 511                                                   partubs[3], partubs[4]);
 512
 513   v0R4->SetNumberOfDivisions(ndiv);
 514
 515   partubs[0]     =  r4;
 516   partubs[1]     =  r5;
 517   partubs[3]     =  90.0-15.0;
 518   partubs[4]     = 120.0-30.0;
 519
 520   TTUBS *v0R5 = new TTUBS("V0R5", "V0R5", "void", partubs[0], partubs[1], partubs[2],
 521                                                   partubs[3], partubs[4]);
 522
 523   v0R5->SetNumberOfDivisions(ndiv);
 524
 525   partubs[3]     = 120.0-30.0;
 526   partubs[4]     = 120.0-15.0;
 527
 528   TTUBS *v0R6 = new TTUBS("V0R6", "V0R6", "void", partubs[0], partubs[1], partubs[2],
 529                                                   partubs[3], partubs[4]);
 530
 531   v0R6->SetNumberOfDivisions(ndiv);
 532
 533   Float_t  phi;
 534   Float_t  phiDeg= 180./6.;
 535
 536   Int_t    ndetR = 1;
 537
 538   char     nameNode[12];
 539
 540   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 541
 542   {
 543
 544     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 545
 546     sprintf(nameNode,"SUBDER%d",ndetR);
 547
 548     v0Rnode->cd();
 549     v0Rnode0 = new TNode(nameNode,nameNode,v0R0,0.0,0.0, 0.0,mat920);
 550     v0Rnode0->SetLineColor(kYellow);
 551     fNodes->Add(v0Rnode0);
 552     ndetR++;
 553
 554     sprintf(nameNode,"SUBDER%d",ndetR);
 555     v0Rnode0->cd();
 556     v0Rnode1 = new TNode(nameNode,nameNode,v0R1,0.0,0.0, -offset,0);
 557     v0Rnode1->SetLineColor(kColorVZERO);
 558     fNodes->Add(v0Rnode1);
 559     ndetR++;
 560
 561     sprintf(nameNode,"SUBDER%d",ndetR);
 562     v0Rnode0->cd();
 563     v0Rnode2 = new TNode(nameNode,nameNode,v0R2,0.0,0.0, -offset + offsetFibers,0);
 564     v0Rnode2->SetLineColor(kColorVZERO);
 565     fNodes->Add(v0Rnode2);
 566     ndetR++;
 567
 568     sprintf(nameNode,"SUBDER%d",ndetR);
 569     v0Rnode0->cd();
 570     v0Rnode3 = new TNode(nameNode,nameNode,v0R3,0.0,0.0, -offset + 2.0*offsetFibers,0);
 571     v0Rnode3->SetLineColor(kColorVZERO);
 572     fNodes->Add(v0Rnode3);
 573     ndetR++;
 574
 575     sprintf(nameNode,"SUBDER%d",ndetR);
 576     v0Rnode0->cd();
 577     v0Rnode4 = new TNode(nameNode,nameNode,v0R4,0.0,0.0, -offset + 3.0*offsetFibers,0);
 578     v0Rnode4->SetLineColor(kColorVZERO);
 579     fNodes->Add(v0Rnode4);
 580     ndetR++;
 581
 582     sprintf(nameNode,"SUBDER%d",ndetR);
 583     v0Rnode0->cd();
 584     v0Rnode5 = new TNode(nameNode,nameNode,v0R5,0.0,0.0, -offset + 4.0*offsetFibers,0);
 585     v0Rnode5->SetLineColor(kColorVZERO);
 586     fNodes->Add(v0Rnode5);
 587     ndetR++;
 588
 589     sprintf(nameNode,"SUBDER%d",ndetR);
 590     v0Rnode0->cd();
 591     v0Rnode6 = new TNode(nameNode,nameNode,v0R6,0.0,0.0, -offset + 4.0*offsetFibers,0);
 592     v0Rnode6->SetLineColor(kColorVZERO);
 593     fNodes->Add(v0Rnode6);
 594     ndetR++;
 595
 596     v0Rnode0->SetVisibility(2);
 597
 598   }
 599
 600 // Left side of VZERO :
 601
 602   Float_t   r0Left      =   4.3;
 603   Float_t   height1Left =   2.6;
 604   Float_t   height2Left =   4.1;
 605   Float_t   height3Left =   6.4;
 606   Float_t   height4Left =  10.2;
 607   Float_t   height5Left =  16.9;
 608   Float_t   heightLeft  = height1Left + height2Left + height3Left
 609                                         + height4Left + height5Left;
 610   Float_t   r5Left      = r0Left  + heightLeft;
 611
 612   partube[0] =  r0Left;
 613   partube[1] =  r5Left;
 614   partube[2] =  fThickness1/2.0;
 615
 616   TTUBE *v0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
 617
 618   top->cd();
 619
 620   v0Lnode = new TNode("V0LE","V0LE",v0LE,0.0,0.0,350.0+fThickness1/2.0,0);
 621
 622   v0Lnode->SetLineColor(kBlue);
 623   fNodes->Add(v0Lnode);
 624
 625   v0Lnode->SetVisibility(2);
 626
 627   partubs[0]      =  r0Left;
 628   partubs[1]      =  r5Left;
 629   partubs[2]      =  fThickness1/2.0;
 630   partubs[3]      =  90.0-15.0;
 631   partubs[4]      = 120.0-15.0;
 632
 633   TTUBS *v0L0 = new TTUBS("V0L0", "V0L0", "void", partubs[0], partubs[1], partubs[2],
 634                                                   partubs[3], partubs[4]);
 635
 636   v0L0->SetNumberOfDivisions(ndiv);
 637   v0L0->SetLineColor(7);
 638
 639   Float_t   offset_left;
 640   offset_left    = - fThickness1/2.0;
 641
 642   Float_t   r1Left =  r0Left + height1Left;
 643
 644   partubs[0]     =  r0Left;
 645   partubs[1]     =  r1Left;
 646
 647   TTUBS *v0L1 = new TTUBS("V0L1", "V0L1", "void", partubs[0], partubs[1], partubs[2],
 648                                                   partubs[3], partubs[4]);
 649
 650   v0L1->SetNumberOfDivisions(ndiv);
 651
 652   Float_t   r2Left =  r1Left + height2Left;
 653
 654   partubs[0]     =  r1Left;
 655   partubs[1]     =  r2Left;
 656
 657   TTUBS *v0L2 = new TTUBS("V0L2", "V0L2", "void", partubs[0], partubs[1], partubs[2],
 658                                                   partubs[3], partubs[4]);
 659
 660   v0L2->SetNumberOfDivisions(ndiv);
 661
 662   Float_t   r3Left  =  r2Left + height3Left;
 663
 664   partubs[0]     =  r2Left;
 665   partubs[1]     =  r3Left;
 666
 667   TTUBS *v0L3 = new TTUBS("V0L3", "V0L3", "void", partubs[0], partubs[1], partubs[2],
 668                                                   partubs[3], partubs[4]);
 669   v0L3->SetNumberOfDivisions(ndiv);
 670
 671   Float_t   r4Left  =   r3Left + height4Left;
 672
 673   partubs[0]     =  r3Left;
 674   partubs[1]     =  r4Left;
 675
 676   TTUBS *v0L4 = new TTUBS("V0L4", "V0L4", "void", partubs[0], partubs[1], partubs[2],
 677                                                   partubs[3], partubs[4]);
 678
 679   v0L4->SetNumberOfDivisions(ndiv);
 680
 681   partubs[0]     =  r4Left;
 682   partubs[1]     =  r5Left;
 683   partubs[3]     =  90.0-15.0;
 684   partubs[4]     = 120.0-30.0;
 685
 686   TTUBS *v0L5 = new TTUBS("V0L5", "V0L5", "void", partubs[0], partubs[1], partubs[2],
 687                                                   partubs[3], partubs[4]);
 688
 689
 690   v0L5->SetNumberOfDivisions(ndiv);
 691
 692   partubs[3]     = 120.0-30.0;
 693   partubs[4]     = 120.0-15.0;
 694
 695   TTUBS *v0L6 = new TTUBS("V0L6", "V0L6", "void", partubs[0], partubs[1], partubs[2],
 696                                                   partubs[3], partubs[4]);
 697
 698   v0L6->SetNumberOfDivisions(ndiv);
 699
 700   Int_t    ndetL   = 1;
 701
 702   for (phi = 15.0; phi < 360.0; phi = phi + phiDeg)
 703
 704   {
 705
 706     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 707
 708
 709     sprintf(nameNode,"SUBDEL%d",ndetL);
 710
 711     v0Lnode->cd();
 712     v0Lnode0 = new TNode(nameNode,nameNode,v0L0,0.0,0.0, offset_left + halfThickQua,mat920);
 713     v0Lnode0->SetLineColor(kColorVZERO);
 714     fNodes->Add(v0Lnode0);
 715     ndetL++;
 716
 717     sprintf(nameNode,"SUBDEL%d",ndetL);
 718     v0Lnode0->cd();
 719     v0Lnode1 = new TNode(nameNode,nameNode,v0L1,0.0,0.0, 0.0,0);
 720     v0Lnode1->SetLineColor(kColorVZERO);
 721     fNodes->Add(v0Lnode1);
 722     ndetL++;
 723
 724     sprintf(nameNode,"SUBDEL%d",ndetL);
 725     v0Lnode0->cd();
 726     v0Lnode2 = new TNode(nameNode,nameNode,v0L2,0.0,0.0, 0.0,0);
 727     v0Lnode2->SetLineColor(kColorVZERO);
 728     fNodes->Add(v0Lnode2);
 729     ndetL++;
 730
 731
 732     sprintf(nameNode,"SUBDEL%d",ndetL);
 733     v0Lnode0->cd();
 734     v0Lnode3 = new TNode(nameNode,nameNode,v0L3,0.0,0.0, 0.0,0);
 735     v0Lnode3->SetLineColor(kColorVZERO);
 736     fNodes->Add(v0Lnode3);
 737     ndetL++;
 738
 739     sprintf(nameNode,"SUBDEL%d",ndetL);
 740     v0Lnode0->cd();
 741     v0Lnode4 = new TNode(nameNode,nameNode,v0L4,0.0,0.0, 0.0,0);
 742     v0Lnode4->SetLineColor(kColorVZERO);
 743     fNodes->Add(v0Lnode4);
 744     ndetL++;
 745
 746     sprintf(nameNode,"SUBDEL%d",ndetL);
 747     v0Lnode0->cd();
 748     v0Lnode5 = new TNode(nameNode,nameNode,v0L5,0.0,0.0, 0.0,0);
 749     v0Lnode5->SetLineColor(kColorVZERO);
 750     fNodes->Add(v0Lnode5);
 751     ndetL++;
 752
 753     sprintf(nameNode,"SUBDEL%d",ndetL);
 754     v0Lnode0->cd();
 755     v0Lnode6 = new TNode(nameNode,nameNode,v0L6,0.0,0.0, 0.0,0);
 756     v0Lnode6->SetLineColor(kColorVZERO);
 757     fNodes->Add(v0Lnode6);
 758     ndetL++;
 759
 760     v0Lnode0->SetVisibility(2);
 761
 762   }
 763
 764 }
 765
 766 //------------------------------------------------------------------------
 767 void AliVZEROv2::CreateMaterials()
 768 {
 769
 770 // Creates materials used for geometry
 771
 772     Int_t i;
 773
 774     printf("\n");
 775     for(i=0;i<25;i++) printf("*");
 776     printf(" VZERO create materials ");
 777     for(i=0;i<26;i++) printf("*");
 778     printf("\n");
 779
 780 /*
 781     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,
 782                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 783
 784
 785     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,
 786                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
 787
 788     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
 789                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
 790                                  1.662295, 1.68337 };
 791
 792     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
 793                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
 794
 795     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 796
 797
 798     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 799
 800
 801     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,
 802                                1e-4,1e-4,1e-4,1e-4 };
 803     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
 804
 805 */
 806
 807     Int_t *idtmed = fIdtmed->GetArray()-2999;
 808
 809 //    TGeant3 *geant3 = (TGeant3*) gMC;
 810
 811 //  Parameters related to Quarz (SiO2) :
 812
 813     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
 814     Int_t nlmatqua;
 815
 816     aqua[0]    = 28.09;
 817     aqua[1]    = 16.;
 818     zqua[0]    = 14.;
 819     zqua[1]    = 8.;
 820     densqua    = 2.64;
 821     nlmatqua   = -2;
 822     wmatqua[0] = 1.;
 823     wmatqua[1] = 2.;
 824
 825 // Parameters  related to aluminum sheets :
 826
 827     Float_t  aal   = 26.98;
 828     Float_t  zal   = 13.00;
 829     Float_t  densal=   2.7;
 830     Float_t  radlal=   8.9;
 831
 832 // Parameters  related to scintillator CH :
 833
 834     Float_t ascin[2] = {1.00794,12.011};
 835     Float_t zscin[2] = {1.,6.};
 836     Float_t wscin[2] = {1.,1.};
 837     Float_t denscin  = 1.032;
 838
 839 //  Definition of materials :
 840
 841     AliMaterial( 1, "AIR A$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
 842     AliMaterial(11, "AIR I$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
 843     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
 844     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
 845     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
 846     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
 847
 848     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 849
 850
 851     Int_t   iSXFLD = gAlice->Field()->Integ();
 852     Float_t sXMGMX = gAlice->Field()->Max();
 853
 854     Float_t tmaxfd, stemax, deemax, epsil, stmin;
 855
 856     tmaxfd = 10.;
 857     stemax = 0.1;
 858     deemax = 0.1;
 859     epsil  = 0.001;
 860     stmin  = 0.001;
 861
 862 //  Active Air :
 863     AliMedium(1, "ACTIVE AIR$", 1, 1, iSXFLD, sXMGMX,
 864               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 865
 866 //  Inactive air :
 867
 868     AliMedium(11, "INACTIVE AIR$", 11, 0, iSXFLD, sXMGMX,
 869               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
 870
 871     AliMedium(2, "CARBON$ ", 2,  1, iSXFLD, sXMGMX,
 872               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
 873
 874     AliMedium(3, "QUARZ$", 3, 1, iSXFLD, sXMGMX,
 875               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
 876
 877     AliMedium(4,"ALUMINUM1$",4, 1, iSXFLD, sXMGMX,
 878               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 879
 880
 881     AliMedium(5,"ALUMINUM2$",5, 1, iSXFLD, sXMGMX,
 882               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
 883
 884     AliMedium(6,"SCINTILLATOR$",6, 1, iSXFLD, sXMGMX, 10.0, 0.1, 0.1, 0.003, 0.003, 0, 0);
 885
 886     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
 887     gMC->Gstpar(idtmed[3000], "HADR", 1.);
 888     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
 889     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
 890
 891     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
 892     gMC->Gstpar(idtmed[3001], "HADR", 1.);
 893     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
 894     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
 895
 896     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
 897     gMC->Gstpar(idtmed[3002], "HADR", 1.);
 898     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
 899     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
 900     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
 901     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
 902
 903     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
 904     gMC->Gstpar(idtmed[3003], "HADR", 1.);
 905     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
 906     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
 907
 908     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
 909     gMC->Gstpar(idtmed[3004], "HADR", 1.);
 910     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
 911     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
 912     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
 913     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
 914
 915     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
 916     gMC->Gstpar(idtmed[3005], "HADR", 1.);
 917     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
 918     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
 919     gMC->Gstpar(idtmed[3005], "CUTGAM",0.5E-4) ;
 920     gMC->Gstpar(idtmed[3005], "CUTELE",1.0E-4) ;
 921
 922
 923 //    geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 924 //    geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 925
 926 //    gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
 927 //    gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
 928
 929
 930 }
 931 //---------------------------------------------------------------------
 932 void AliVZEROv2::DrawModule()
 933 {
 934
 935 //  Drawing is done in DrawVZERO.C
 936
 937    Int_t i;
 938
 939    printf("\n");
 940    for(i=0;i<30;i++) printf("*");
 941    printf(" VZERO DrawModule ");
 942    for(i=0;i<30;i++) printf("*");
 943    printf("\n");
 944
 945
 946 }
 947
 948 //-------------------------------------------------------------------
 949 void AliVZEROv2::Init()
 950 {
 951 // Initialises version 1 of the VZERO Detector
 952 // Just prints an information message
 953
 954    printf(" VZERO version %d initialized \n",IsVersion());
 955
 956 //   gMC->SetMaxStep(fMaxStepAlu);
 957 //   gMC->SetMaxStep(fMaxStepQua);
 958
 959     AliVZERO::Init();
 960
 961 }
 962
 963 //-------------------------------------------------------------------
 964
 965 void AliVZEROv2::StepManager()
 966 {
 967
 968 // Step Manager, called at each step
 969
 970      Int_t     copy;
 971      static    Int_t   vol[4];
 972      static    Float_t hits[19];
 973      static    Float_t eloss, tlength;
 974
 975      TLorentzVector pos;
 976      TLorentzVector mom;
 977
 978      Float_t        theta;
 979      Float_t        phi;
 980      Float_t        kRaddeg = 180/TMath::Pi();
 981      Float_t        ringNumber;
 982
 983      Int_t          ipart;
 984      Float_t        destep, step;
 985
 986
 987 //   We keep only charged tracks :
 988
 989      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
 990
 991
 992      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
 993      vol[2]    = gMC->CurrentVolID(copy);
 994      vol[3]    = copy;
 995
 996
 997      if      ( gMC->CurrentVolID(copy) == gMC->VolId("V0R1") ||
 998                gMC->CurrentVolID(copy) == gMC->VolId("V0L1") )
 999                ringNumber = 1.0;
1000      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R2") ||
1001                gMC->CurrentVolID(copy) == gMC->VolId("V0L2") )
1002                ringNumber = 2.0;
1003      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R3") ||
1004                gMC->CurrentVolID(copy) == gMC->VolId("V0L3") )
1005                ringNumber = 3.0;
1006      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R4") ||
1007                gMC->CurrentVolID(copy) == gMC->VolId("V0L4") )
1008                ringNumber = 4.0;
1009      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R5") ||
1010                gMC->CurrentVolID(copy) == gMC->VolId("V0L5") ||
1011                gMC->CurrentVolID(copy) == gMC->VolId("V0L6") ||
1012                gMC->CurrentVolID(copy) == gMC->VolId("V0R6") )
1013                ringNumber = 5.0;
1014      else
1015                ringNumber = 0.0;
1016
1017      if  (  ringNumber > 0.5  ) {
1018
1019         destep    = gMC->Edep();
1020         step      = gMC->TrackStep();
1021         eloss    += destep;
1022         tlength  += step;
1023
1024
1025         if  ( gMC->IsTrackEntering()  )  {
1026
1027             gMC->TrackPosition(pos);
1028
1029             gMC->TrackMomentum(mom);
1030             Double_t tc   = mom[0]*mom[0]+mom[1]*mom[1];
1031             Double_t pt   = TMath::Sqrt(tc);
1032             Double_t pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
1033             theta   = Float_t(TMath::ATan2(pt,Double_t(mom[2])))*kRaddeg;
1034             phi     = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1035
1036             ipart  = gMC->TrackPid();
1037
1038             hits[0]  = pos[0];
1039             hits[1]  = pos[1];
1040             hits[2]  = pos[2];
1041             hits[3]  =  Float_t (ipart);
1042
1043             hits[4]  = gMC->TrackTime();
1044             hits[5]  = gMC->TrackCharge();
1045             hits[6]  = theta;
1046             hits[7]  = phi;
1047             hits[8]  = ringNumber;
1048
1049             hits[9]  = pt;
1050             hits[10] = pmom;
1051             hits[11] = mom[0];
1052             hits[12] = mom[1];
1053             hits[13] = mom[2];
1054
1055             TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
1056             hits[14] = par->Vx();
1057             hits[15] = par->Vy();
1058             hits[16] = par->Vz();
1059
1060             tlength  = 0.0;
1061             eloss    = 0.0;
1062
1063          }
1064
1065          if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1066
1067          hits[17] =   eloss;
1068          hits[18] = tlength;
1069
1070          AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
1071
1072          tlength  = 0.0;
1073          eloss    = 0.0;
1074
1075
1076          }
1077     }
1078
1079 }
1080
1081 //_____________________________________________________________________________
1082 void AliVZEROv2::AddHit(Int_t track, Int_t *vol, Float_t *hits)
1083 {
1084
1085 //  Adds a VZERO hit
1086
1087   TClonesArray &lhits = *fHits;
1088   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
1089 }
1090
1091 //---------------------------------------------------------------------
1092 void AliVZEROv2::AddDigits(Int_t *tracks, Int_t* digits)
1093 {
1094
1095 //  Adds a VZERO digit
1096
1097    TClonesArray  &ldigits = *fDigits;
1098    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1099 }
1100
1101 //---------------------------------------------------------------------
1102 void AliVZEROv2::MakeBranch(Option_t *option)
1103 {
1104
1105 // Creates new branches in the current Root Tree
1106
1107   char branchname[10];
1108   sprintf(branchname,"%s",GetName());
1109   printf(" fBufferSize = %d \n",fBufferSize);
1110
1111   const char *cH = strstr(option,"H");
1112
1113   if (fHits   && TreeH() && cH) {
1114     TreeH()->Branch(branchname,&fHits, fBufferSize);
1115     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1116   }
1117
1118   const char *cD = strstr(option,"D");
1119   //
1120   if (fDigits   && fLoader->TreeD() && cD) {
1121     fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1122     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1123   }
1124
1125 }