VZERO/AliVZEROv0.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
  17 //////////////////////////////////////////////////////////////////////
  18 //                                                                  //
  19 //  (V-zero) detector  version 0  as designed by the Lyon group     //
  20 //   All comments should be sent to Brigitte CHEYNIS :              //
  21 //                                  b.cheynis@ipnl.in2p3.fr         //
  22 //   Geometrie      du 25/02/2002                                   //
  23 //                                                                  //
  24 //////////////////////////////////////////////////////////////////////
  25
  26 #include <TMath.h>
  27 #include <TGeometry.h>
  28 #include <TTRD2.h>
  29 #include <TCONE.h>
  30 #include <TPGON.h>
  31 #include <TPCON.h>
  32 #include <TSPHE.h>
  33 #include <TTRAP.h>
  34 #include <TBRIK.h>
  35 #include <TBox.h>
  36
  37 #include <TShape.h>
  38 #include <TNode.h>
  39 #include <TClonesArray.h>
  40 #include <TH1.h>
  41 #include <string.h>
  42 #include <Riostream.h>
  43
  44 #include "AliVZEROv0.h"
  45 #include "AliRun.h"
  46 #include "AliMagF.h"
  47 #include "AliMC.h"
  48 #include "AliVZEROhit.h"
  49 #include "AliVZEROdigit.h"
  50 #include <Riostream.h>
  51 #include <Riostream.h>
  52
  53 #include <stdlib.h>
  54 #include "TObjectTable.h"
  55
  56 #include "AliConst.h"
  57 #include "ABSOSHILConst.h"
  58 #include "ABSOConst.h"
  59 #include "TLorentzVector.h"
  60
  61 ClassImp(AliVZEROv0)
  62
  63 //--------------------------------------------------------------------
  64 AliVZEROv0:: AliVZEROv0():AliVZERO()
  65 {
  66
  67
  68 }
  69 //--------------------------------------------------------------------
  70 AliVZEROv0::AliVZEROv0(const char *name, const char *title):
  71  AliVZERO(name,title)
  72 {
  73
  74 // Standard constructor for V-zeroR Detector (right part)  version 0
  75
  76
  77   Int_t i;
  78
  79   printf("\n");
  80   for(i=0;i<30;i++) printf("*");
  81   printf(" Create VZERO object ");
  82   for(i=0;i<30;i++) printf("*");
  83   printf("\n");
  84
  85 }
  86
  87 //-------------------------------------------------------------------------
  88 void AliVZEROv0::CreateGeometry()
  89 {
  90
  91 // Creates the Geant geometry of the V-zero Detector  version 0
  92
  93
  94   Int_t i;
  95
  96   printf("\n");
  97   for(i=0;i<30;i++) printf("*");
  98   printf(" Create VZERO Geometry ");
  99   for(i=0;i<30;i++) printf("*");
 100   printf("\n");
 101
 102
 103   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 104
 105   Int_t    n_detec_R = 1;
 106   Int_t    n_detec_L = 1;
 107
 108   Int_t    n_cells_R = 1;
 109   Int_t    n_cells_L = 1;
 110
 111   Int_t    idrotm[999];
 112
 113   Float_t  height1, height2, height3, height4, height5;
 114   Float_t  height;
 115   Float_t  theta;
 116   Float_t  half_thick_alu;
 117   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
 118   Float_t  half_thick_qua4,half_thick_qua5;
 119   Float_t  zdet;
 120   Float_t  r0, r5;
 121   Float_t  pi = TMath::Pi();
 122   Float_t  thick_alu;
 123
 124   height1           =     2.0;           // height of cell 1, in cm
 125   height2           =     3.2;           // height of cell 2, in cm
 126   height3           =     4.9;           // height of cell 3, in cm
 127   height4           =     7.5;           // height of cell 4, in cm
 128   height5           =    12.0;           // height of cell 5, in cm
 129
 130   theta             = pi/6.0/2.0;       // half angular opening = 15 degrees
 131   half_thick_alu    = 0.0025;            // half thickness of aluminum foil, in cm
 132   thick_alu         = 2.0 * half_thick_alu;
 133   fThickness1       = 2.5;
 134   half_thick_qua1   = fThickness1/2.0;   // half thickness of WRAPPED quartz cell (inner ring)
 135   half_thick_qua2   = half_thick_qua1  - 0.25;
 136   half_thick_qua3   = half_thick_qua2  - 0.25;
 137   half_thick_qua4   = half_thick_qua3  - 0.25;
 138   half_thick_qua5   = half_thick_qua4  - 0.25;
 139
 140   zdet              =    86.9 +fThickness/2.0;  // distance to vertex (along Z axis)
 141   r0                =    4.0;            // closest distance to center of the beam pipe
 142   height            =    height1 + height2 + height3 + height4 + height5;
 143   r5                =    r0 + height;
 144
 145 //............................................................................
 146
 147 // Here I add the flange which is sitting on beam line
 148 // right in front of V0R detector, and which I found on CERN drawing
 149 // entitled : ALICE BEAM VACCUM CHAMBER - RB26 version III :
 150
 151 //     Float_t   pflange[3];
 152 //
 153 //     pflange[0] = 3.0;
 154 //     pflange[1] = 5.675;
 155 //     pflange[2] = 0.9;
 156 //
 157 //     gMC->Gsvolu("QFA0","TUBE", idtmed[3003], pflange, 3);
 158 //     gMC->Gspos("QFA0", 1 ,"ALIC", 0.0, 0.0, 85.0+0.9, 0, "ONLY");
 159
 160 //............................................................................
 161
 162
 163 // Creation of mother volume V0LE - left part - :
 164 // Face entree a -350.0 cm ...
 165
 166    Float_t   partube[3];
 167
 168    partube[0] =  4.3;
 169    partube[1] = 45.0;
 170    partube[2] = fThickness1/2.0;
 171
 172    gMC->Gsvolu("V0LE","TUBE",idtmed[3002],partube,3);
 173
 174
 175 // Creation of five rings - left part - :
 176 // Face entree a -350.0 cm ...
 177
 178 // Mother volume V0L0 in which will be set 5 quartz cells
 179
 180
 181   Float_t   par[11];
 182
 183   Float_t   dist0_left;
 184   Float_t   r0_left      =   4.3;
 185   Float_t   height1_left =   2.6;
 186   Float_t   height2_left =   4.1;
 187   Float_t   height3_left =   6.4;
 188   Float_t   height4_left =  10.2;
 189   Float_t   height5_left =  16.9;
 190   Float_t   height_left  = height1_left + height2_left + height3_left
 191                                         + height4_left + height5_left;
 192   Float_t   r5_left      = r0_left  + height_left;
 193
 194
 195   dist0_left  =  r0_left + height_left / 2.0;
 196   thick_alu   =  2.0*half_thick_alu;
 197
 198   par[0]      =  half_thick_qua1;
 199   par[1]      =  0.0;
 200   par[2]      =  0.0;
 201   par[3]      =  height_left / 2.0 ;
 202   par[4]      =  TMath::Tan(theta) * r0_left;
 203   par[5]      =  TMath::Tan(theta) * r5_left;
 204   par[6]      =  0.0;
 205   par[7]      =  height_left / 2.0 ;
 206   par[8]      =  TMath::Tan(theta) * r0_left;
 207   par[9]      =  TMath::Tan(theta) * r5_left;
 208   par[10]     =  0.0;
 209
 210
 211   gMC->Gsvolu("V0L0","TRAP",idtmed[3010],par,11);  // air volume
 212
 213   Float_t   dist1_left;
 214   Float_t   r1_left;
 215   Float_t   offset_left;
 216
 217   dist1_left     =  (- height_left + height1_left) /2.0;
 218   r1_left        =  r0_left + height1_left;
 219   offset_left    = - fThickness1/2.0 + 0.1;
 220
 221   par[0]    =  half_thick_qua1 - thick_alu;
 222   par[3]    =  height1_left / 2.0 - thick_alu;
 223   par[4]    =  TMath::Tan(theta) * r0_left - thick_alu;
 224   par[5]    =  TMath::Tan(theta) * r1_left- thick_alu;
 225   par[7]    =  height1_left / 2.0 - thick_alu;
 226   par[8]    =  TMath::Tan(theta) * r0_left - thick_alu;
 227   par[9]    =  TMath::Tan(theta) * r1_left - thick_alu;
 228
 229
 230   gMC->Gsvolu("V0L1","TRAP",idtmed[3002],par,11);  // quartz volume
 231   gMC->Gspos("V0L1",1,"V0L0", 0.0, dist1_left , 0.0, 0,"ONLY");
 232
 233   Float_t   dist2_left;
 234   Float_t   r2_left;
 235
 236   dist2_left     =    (- height_left + height2_left) /2.0 + height1_left;
 237   r2_left        =       r1_left + height2_left;
 238
 239   par[0]    =  half_thick_qua1 - thick_alu;
 240   par[3]    =  height2_left / 2.0 - thick_alu;
 241   par[4]    =  TMath::Tan(theta) * r1_left - thick_alu;
 242   par[5]    =  TMath::Tan(theta) * r2_left - thick_alu;
 243   par[7]    =  height2_left / 2.0 - thick_alu;
 244   par[8]    =  TMath::Tan(theta) * r1_left - thick_alu;
 245   par[9]    =  TMath::Tan(theta) * r2_left - thick_alu;
 246
 247   gMC->Gsvolu("V0L2","TRAP",idtmed[3002],par,11);  // quartz volume
 248   gMC->Gspos("V0L2",1,"V0L0", 0.0, dist2_left , 0.0, 0,"ONLY");
 249
 250
 251   Float_t   dist3_left;
 252   Float_t   r3_left;
 253
 254   dist3_left     =    (- height_left + height3_left) /2.0 + height1_left + height2_left;
 255   r3_left        =       r2_left + height3_left;
 256
 257   par[0]    =  half_thick_qua1 - thick_alu;
 258   par[3]    =  height3_left / 2.0 - thick_alu;
 259   par[4]    =  TMath::Tan(theta) * r2_left - thick_alu;
 260   par[5]    =  TMath::Tan(theta) * r3_left - thick_alu;
 261   par[7]    =  height3_left / 2.0 - thick_alu;
 262   par[8]    =  TMath::Tan(theta) * r2_left - thick_alu;
 263   par[9]    =  TMath::Tan(theta) * r3_left - thick_alu;
 264
 265   gMC->Gsvolu("V0L3","TRAP",idtmed[3002],par,11);  // quartz volume
 266   gMC->Gspos("V0L3",1,"V0L0", 0.0, dist3_left , 0.0, 0,"ONLY");
 267
 268   Float_t   dist4_left;
 269   Float_t   r4_left;
 270
 271   dist4_left     =    (- height_left + height4_left) /2.0 + height1_left
 272                                      + height2_left + height3_left;
 273   r4_left        =       r3_left + height4_left;
 274
 275   par[0]    =  half_thick_qua1 - thick_alu;
 276   par[3]    =  height4_left / 2.0 - thick_alu;
 277   par[4]    =  TMath::Tan(theta) * r3_left - thick_alu;
 278   par[5]    =  TMath::Tan(theta) * r4_left - thick_alu;
 279   par[7]    =  height4_left / 2.0 - thick_alu;
 280   par[8]    =  TMath::Tan(theta) * r3_left - thick_alu;
 281   par[9]    =  TMath::Tan(theta) * r4_left - thick_alu;
 282
 283   gMC->Gsvolu("V0L4","TRAP",idtmed[3002],par,11);  // quartz volume
 284   gMC->Gspos("V0L4",1,"V0L0", 0.0, dist4_left , 0.0, 0,"ONLY");
 285
 286
 287   Float_t   dist5_left;
 288
 289
 290   dist5_left     =    (- height_left + height5_left) /2.0 + height1_left
 291                                      + height2_left + height3_left + height4_left;
 292
 293
 294   par[0]    =  half_thick_qua1 - thick_alu;
 295   par[3]    =  height5_left / 2.0 - thick_alu;
 296   par[4]    =  TMath::Tan(theta) * r4_left - thick_alu;
 297   par[5]    =  TMath::Tan(theta) * r5_left - thick_alu;
 298   par[7]    =  height5_left / 2.0 - thick_alu;
 299   par[8]    =  TMath::Tan(theta) * r4_left - thick_alu;
 300   par[9]    =  TMath::Tan(theta) * r5_left - thick_alu;
 301
 302   gMC->Gsvolu("V0L5","TRAP",idtmed[3002],par,11);  // quartz volume
 303   gMC->Gspos("V0L5",1,"V0L0", 0.0, dist5_left , 0.0, 0,"ONLY");
 304
 305
 306 //............................................................................
 307
 308 // Creation of mother volume V0RI - right part - :
 309
 310
 311   partube[0] = r0 - 0.2;
 312   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
 313   partube[2] = fThickness/2.0;
 314
 315
 316   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 317
 318 // Creation of  carbon lids (1 mm thick) to keep V0RI box shut...
 319
 320   Float_t   parbox[10];
 321
 322   parbox[0] =    0.;
 323   parbox[1] =  360.;
 324   parbox[2] =    12;
 325   parbox[3] =     2;
 326   parbox[4] =  -0.1/2.0;
 327   parbox[5] =  r0;
 328   parbox[6] =  r5;
 329   parbox[7] =  +0.1/2.0;
 330   parbox[8] =  r0;
 331   parbox[9] =  r5;
 332
 333
 334   gMC->Gsvolu("V0CA","PGON",idtmed[3001],parbox,10);
 335   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-parbox[7],0,"ONLY");
 336   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+parbox[7],0,"ONLY");
 337
 338 // Creation of aluminum rings to maintain the V0RI pieces ...
 339
 340   parbox[4] =  -fThickness/2.0;
 341   parbox[5] =  r0 -0.2;
 342   parbox[6] =  r0;
 343   parbox[7] =  +fThickness/2.0;
 344   parbox[8] =  r0 -0.2;
 345   parbox[9] =  r0;
 346
 347   gMC->Gsvolu("V0IR","PGON",idtmed[3003],parbox,10);
 348   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 349
 350   parbox[4] =  -fThickness/2.0;
 351   parbox[5] =  r5;
 352   parbox[6] =  r5 + 1.0;
 353   parbox[7] =  +fThickness/2.0;
 354   parbox[8] =  r5;
 355   parbox[9] =  r5 + 1.0;
 356
 357   gMC->Gsvolu("V0ER","PGON",idtmed[3003],parbox,10);
 358   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 359
 360 // Mother volume V0R0 in which will be set 5  quartz cells
 361 // each one  WRAPPED in reflecting aluminum :
 362
 363   Float_t   dist0;
 364
 365   dist0     =  r0 + height / 2.0;
 366   thick_alu =  2.0*half_thick_alu;
 367
 368   par[0]    =  half_thick_qua1;
 369   par[1]    =  0.0;
 370   par[2]    =  0.0;
 371   par[3]    =  height / 2.0 ;
 372   par[4]    =  TMath::Tan(theta) * r0;
 373   par[5]    =  TMath::Tan(theta) * r5;
 374   par[6]    =  0.0;
 375   par[7]    =  height / 2.0 ;
 376   par[8]    =  TMath::Tan(theta) * r0;
 377   par[9]    =  TMath::Tan(theta) * r5;
 378   par[10]   =  0.0;
 379
 380
 381   gMC->Gsvolu("V0R0","TRAP",idtmed[3010],par,11);  // air volume
 382
 383 // Elementary cell of ring 1 :
 384
 385   Float_t   dist1;
 386   Float_t   r1;
 387   Float_t   offset;
 388
 389   dist1     =  (- height + height1) /2.0;
 390   r1        =  r0 + height1;
 391   offset    = - fThickness/2.0 + 0.1;
 392
 393   par[0]    =  half_thick_qua1 - thick_alu;
 394   par[3]    =  height1 / 2.0 - thick_alu;
 395   par[4]    =  TMath::Tan(theta) * r0 - thick_alu;
 396   par[5]    =  TMath::Tan(theta) * r1- thick_alu;
 397   par[7]    =  height1 / 2.0 - thick_alu;
 398   par[8]    =  TMath::Tan(theta) * r0 - thick_alu;
 399   par[9]    =  TMath::Tan(theta) * r1 - thick_alu;
 400
 401
 402   gMC->Gsvolu("V0R1","TRAP",idtmed[3002],par,11);  // quartz volume
 403   gMC->Gspos("V0R1",1,"V0R0", 0.0, dist1 , 0.0, 0,"ONLY");
 404
 405   par[0]    =  half_thick_alu;
 406
 407   gMC->Gsvolu("V0A1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 408   gMC->Gspos("V0A1",1,"V0R1",0.0,0.0, - half_thick_qua1 + half_thick_alu,0,"ONLY");
 409   gMC->Gspos("V0A1",2,"V0R1",0.0,0.0, + half_thick_qua1 - half_thick_alu,0,"ONLY");
 410
 411   parbox[0] = half_thick_alu;
 412   parbox[1] = height1 / TMath::Cos(theta)/ 2.0;
 413   parbox[2] = half_thick_qua1;
 414
 415   gMC->Gsvolu("V0A2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 416   Float_t  theta_deg = 180./6./2.0;
 417   Float_t h1;
 418   h1 = TMath::Tan(theta) * (r0 + height1/2.0);
 419   AliMatrix(idrotm[911],90.0,+theta_deg,90.0,90.+theta_deg,0.0,0.);
 420   gMC->Gspos("V0A2",1,"V0R1",-h1 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 421   AliMatrix(idrotm[912],90.0,-theta_deg,90.0,90.-theta_deg,0.0,0.);
 422   gMC->Gspos("V0A2",2,"V0R1",+h1 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 423
 424   parbox[0] = TMath::Tan(theta) * r0;
 425   parbox[1] = half_thick_alu;
 426   parbox[2] = half_thick_qua1;
 427   gMC->Gsvolu("V0A3","BOX",idtmed[3004],parbox,3);
 428   gMC->Gspos("V0A3",1,"V0R1",0.0, - (height1/2.0) + half_thick_alu ,0.0,0,"ONLY");
 429
 430
 431   parbox[0] = TMath::Tan(theta) * (r0 + height1);
 432   parbox[1] = half_thick_alu;
 433   parbox[2] = half_thick_qua1;
 434   gMC->Gsvolu("V0A4","BOX",idtmed[3004],parbox,3);
 435   gMC->Gspos("V0A4",1,"V0R1",0.0, (height1/2.0) - half_thick_alu,0.0,0,"ONLY");
 436
 437
 438 //  Elementary cell of ring 2 :
 439
 440   Float_t   dist2;
 441   Float_t   r2;
 442
 443   dist2     =    (- height + height2) /2.0 + height1;
 444   r2        =       r1 + height2;
 445
 446   par[0]    =  half_thick_qua2 - thick_alu;
 447   par[3]    =  height2 / 2.0 - thick_alu;
 448   par[4]    =  TMath::Tan(theta) * r1 - thick_alu;
 449   par[5]    =  TMath::Tan(theta) * r2 - thick_alu;
 450   par[7]    =  height2 / 2.0 - thick_alu;
 451   par[8]    =  TMath::Tan(theta) * r1 - thick_alu;
 452   par[9]    =  TMath::Tan(theta) * r2 - thick_alu;
 453
 454   gMC->Gsvolu("V0R2","TRAP",idtmed[3002],par,11);  // quartz volume
 455   gMC->Gspos("V0R2",1,"V0R0", 0.0, dist2 , - half_thick_qua1 + half_thick_qua2, 0,"ONLY");
 456
 457   par[0]    =  half_thick_alu;
 458
 459   gMC->Gsvolu("V0B1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 460   gMC->Gspos("V0B1",1,"V0R2",0.0,0.0, - half_thick_qua2 + half_thick_alu,0,"ONLY");
 461   gMC->Gspos("V0B1",2,"V0R2",0.0,0.0, + half_thick_qua2 - half_thick_alu,0,"ONLY");
 462
 463   parbox[0] = half_thick_alu;
 464   parbox[1] = height2 / TMath::Cos(theta)/ 2.0;
 465   parbox[2] = half_thick_qua2;
 466
 467   gMC->Gsvolu("V0B2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 468   Float_t h2;
 469   h2 = TMath::Tan(theta) * (r0  + height1 + height2/2.0);
 470   gMC->Gspos("V0B2",1,"V0R2",-h2 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 471   gMC->Gspos("V0B2",2,"V0R2",+h2 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 472
 473   parbox[0] = TMath::Tan(theta) * (r0 + height1);
 474   parbox[1] = half_thick_alu;
 475   parbox[2] = half_thick_qua2;
 476   gMC->Gsvolu("V0B3","BOX",idtmed[3004],parbox,3);
 477   gMC->Gspos("V0B3",1,"V0R2",0.0, - (height2/2.0) + half_thick_alu ,0.0,0,"ONLY");
 478
 479
 480   parbox[0] = TMath::Tan(theta) * (r0 + height1 +  height2);
 481   parbox[1] = half_thick_alu;
 482   parbox[2] = half_thick_qua2;
 483   gMC->Gsvolu("V0B4","BOX",idtmed[3004],parbox,3);
 484   gMC->Gspos("V0B4",1,"V0R2",0.0, (height2/2.0) - half_thick_alu,0.0,0,"ONLY");
 485
 486
 487 // Elementary cell  ring 3 :
 488
 489   Float_t   dist3;
 490   Float_t   r3;
 491
 492   dist3     =    (- height + height3) /2.0 + height1 + height2;
 493   r3        =       r2 + height3;
 494
 495   par[0]    =  half_thick_qua3 - thick_alu;
 496   par[3]    =  height3 / 2.0 - thick_alu;
 497   par[4]    =  TMath::Tan(theta) * r2 - thick_alu;
 498   par[5]    =  TMath::Tan(theta) * r3 - thick_alu;
 499   par[7]    =  height3 / 2.0 - thick_alu;
 500   par[8]    =  TMath::Tan(theta) * r2 - thick_alu;
 501   par[9]    =  TMath::Tan(theta) * r3 - thick_alu;
 502
 503   gMC->Gsvolu("V0R3","TRAP",idtmed[3002],par,11);  // quartz volume
 504   gMC->Gspos("V0R3",1,"V0R0", 0.0, dist3 , - half_thick_qua1 +  half_thick_qua3, 0,"ONLY");
 505
 506
 507   par[0]    =  half_thick_alu;
 508
 509   gMC->Gsvolu("V0C1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 510   gMC->Gspos("V0C1",1,"V0R3",0.0,0.0, - half_thick_qua3 + half_thick_alu,0,"ONLY");
 511   gMC->Gspos("V0C1",2,"V0R3",0.0,0.0, + half_thick_qua3 - half_thick_alu,0,"ONLY");
 512
 513   parbox[0] = half_thick_alu;
 514   parbox[1] = height3 / TMath::Cos(theta)/ 2.0;
 515   parbox[2] = half_thick_qua3;
 516
 517   gMC->Gsvolu("V0C2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 518   Float_t h3;
 519   h3 = TMath::Tan(theta) * (r0  + height1 + height2 + height3/2.0);
 520   gMC->Gspos("V0C2",1,"V0R3",-h3 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 521   gMC->Gspos("V0C2",2,"V0R3",+h3 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 522
 523   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2);
 524   parbox[1] = half_thick_alu;
 525   parbox[2] = half_thick_qua3;
 526   gMC->Gsvolu("V0C3","BOX",idtmed[3004],parbox,3);
 527   gMC->Gspos("V0C3",1,"V0R3",0.0, - (height3/2.0) + half_thick_alu ,0.0,0,"ONLY");
 528
 529
 530   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
 531   parbox[1] = half_thick_alu;
 532   parbox[2] = half_thick_qua3;
 533   gMC->Gsvolu("V0C4","BOX",idtmed[3004],parbox,3);
 534   gMC->Gspos("V0C4",1,"V0R3",0.0, (height3/2.0) - half_thick_alu,0.0,0,"ONLY");
 535
 536
 537 // Elementary cell  ring 4 :
 538
 539   Float_t   dist4;
 540   Float_t   r4;
 541
 542   dist4     =    (- height + height4) /2.0 + height1 + height2 + height3;
 543   r4        =       r3 + height4;
 544
 545   par[0]    =  half_thick_qua4 - thick_alu;
 546   par[3]    =  height4 / 2.0 - thick_alu;
 547   par[4]    =  TMath::Tan(theta) * r3 - thick_alu;
 548   par[5]    =  TMath::Tan(theta) * r4 - thick_alu;
 549   par[7]    =  height4 / 2.0 - thick_alu;
 550   par[8]    =  TMath::Tan(theta) * r3 - thick_alu;
 551   par[9]    =  TMath::Tan(theta) * r4 - thick_alu;
 552
 553   gMC->Gsvolu("V0R4","TRAP",idtmed[3002],par,11);  // quartz volume
 554   gMC->Gspos("V0R4",1,"V0R0", 0.0, dist4 , - half_thick_qua1 + half_thick_qua4, 0,"ONLY");
 555
 556
 557   par[0]    =  half_thick_alu;
 558
 559   gMC->Gsvolu("V0D1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 560   gMC->Gspos("V0D1",1,"V0R4",0.0,0.0, - half_thick_qua4 + half_thick_alu,0,"ONLY");
 561   gMC->Gspos("V0D1",2,"V0R4",0.0,0.0, + half_thick_qua4 - half_thick_alu,0,"ONLY");
 562
 563   parbox[0] = half_thick_alu;
 564   parbox[1] = height4 / TMath::Cos(theta)/ 2.0;
 565   parbox[2] = half_thick_qua4;
 566
 567   gMC->Gsvolu("V0D2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 568   Float_t h4;
 569   h4 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4/2.0);
 570   gMC->Gspos("V0D2",1,"V0R4",-h4 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 571   gMC->Gspos("V0D2",2,"V0R4",+h4 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 572
 573   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
 574   parbox[1] = half_thick_alu;
 575   parbox[2] = half_thick_qua4;
 576   gMC->Gsvolu("V0D3","BOX",idtmed[3004],parbox,3);
 577   gMC->Gspos("V0D3",1,"V0R4",0.0, - (height4/2.0) + half_thick_alu ,0.0,0,"ONLY");
 578
 579
 580   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
 581   parbox[1] = half_thick_alu;
 582   parbox[2] = half_thick_qua4;
 583   gMC->Gsvolu("V0D4","BOX",idtmed[3004],parbox,3);
 584   gMC->Gspos("V0D4",1,"V0R4",0.0, (height4/2.0) - half_thick_alu,0.0,0,"ONLY");
 585
 586
 587 // Elementary cell  ring 5 :
 588
 589   Float_t   dist5;
 590
 591   dist5     =    (- height + height5) /2.0 + height1 + height2 + height3 + height4;
 592
 593   par[0]    =  half_thick_qua5 - thick_alu;
 594   par[3]    =  height5 / 2.0 - thick_alu;
 595   par[4]    =  TMath::Tan(theta) * r4 - thick_alu;
 596   par[5]    =  TMath::Tan(theta) * r5 - thick_alu;
 597   par[7]    =  height5 / 2.0 - thick_alu;
 598   par[8]    =  TMath::Tan(theta) * r4 - thick_alu;
 599   par[9]    =  TMath::Tan(theta) * r5 - thick_alu;
 600
 601   gMC->Gsvolu("V0R5","TRAP",idtmed[3002],par,11);  // quartz volume
 602   gMC->Gspos("V0R5",1,"V0R0", 0.0, dist5 , - half_thick_qua1 +  half_thick_qua5, 0,"ONLY");
 603
 604
 605   par[0]    =  half_thick_alu;
 606
 607   gMC->Gsvolu("V0E1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 608   gMC->Gspos("V0E1",1,"V0R5",0.0,0.0, - half_thick_qua5 + half_thick_alu,0,"ONLY");
 609   gMC->Gspos("V0E1",2,"V0R5",0.0,0.0, + half_thick_qua5 - half_thick_alu,0,"ONLY");
 610
 611   parbox[0] = half_thick_alu;
 612   parbox[1] = height5 / TMath::Cos(theta)/ 2.0;
 613   parbox[2] = half_thick_qua5;
 614
 615   gMC->Gsvolu("V0E2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 616   Float_t h5;
 617   h5 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4 + height5/2.0);
 618   gMC->Gspos("V0E2",1,"V0R5",-h5 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 619   gMC->Gspos("V0E2",2,"V0R5",+h5 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 620
 621   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
 622   parbox[1] = half_thick_alu;
 623   parbox[2] = half_thick_qua5;
 624   gMC->Gsvolu("V0E3","BOX",idtmed[3004],parbox,3);
 625   gMC->Gspos("V0E3",1,"V0R5",0.0, - (height5/2.0) + half_thick_alu ,0.0,0,"ONLY");
 626
 627
 628   parbox[0] = TMath::Tan(theta) * r5;
 629   parbox[1] = half_thick_alu;
 630   parbox[2] = half_thick_qua5;
 631   gMC->Gsvolu("V0E4","BOX",idtmed[3004],parbox,3);
 632   gMC->Gspos("V0E4",1,"V0R5",0.0, (height5/2.0) - half_thick_alu,0.0,0,"ONLY");
 633
 634
 635   Float_t  phi_rad ;
 636   Float_t  phi_deg = 180./6.;
 637
 638  // Partie de droite :
 639
 640   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phi_deg)
 641       {
 642         phi_rad = phi*pi/180.;
 643         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 644         gMC->Gspos("V0R0",n_detec_R,"V0RI",-dist0*TMath::Sin(phi_rad),
 645                           dist0*TMath::Cos(phi_rad),offset + half_thick_qua1,idrotm[902],"ONLY");
 646         n_detec_R++;
 647        }
 648
 649   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,zdet,0,"ONLY");
 650
 651   n_cells_R = (n_detec_R - 1) * 5;
 652   printf(" \n\n\n");
 653   printf("    Number of cells on Right side =   %d\n",  n_cells_R);
 654
 655 // Partie de gauche :
 656
 657   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phi_deg)
 658       {
 659         phi_rad = phi*pi/180.;
 660         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 661         gMC->Gspos("V0L0",n_detec_L,"V0LE",-dist0_left*TMath::Sin(phi_rad),
 662                           dist0_left*TMath::Cos(phi_rad),offset_left + half_thick_qua1,idrotm[902],"ONLY");
 663         n_detec_L++;
 664        }
 665
 666
 667   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,-350.0-fThickness1/2.0,0,"ONLY");
 668
 669   n_cells_L = (n_detec_L - 1) * 5;
 670   printf(" \n\n\n");
 671   printf("    Number of cells on Left side  =   %d\n\n",  n_cells_L);
 672
 673
 674 }
 675
 676
 677
 678 //_____________________________________________________________________________
 679 void AliVZEROv0::BuildGeometry()
 680 {
 681
 682   // Builds simple ROOT TNode geometry for event display
 683
 684
 685   Int_t i;
 686
 687   printf("\n");
 688   for(i=0;i<30;i++) printf("*");
 689   printf(" VZERO BuildGeometry ");
 690   for(i=0;i<30;i++) printf("*");
 691   printf("\n");
 692
 693   TNode *Top;
 694
 695   TNode *V0Rnode, *V0Rnode0, *V0Rnode6 , *V0Rnode7, *V0Rnode8, *V0Rnode9;
 696   TNode *V0Rnode1, *V0Rnode2, *V0Rnode3, *V0Rnode4, *V0Rnode5;
 697   TNode *V0Lnode, *V0Lnode0;
 698   TNode *V0Lnode1, *V0Lnode2, *V0Lnode3, *V0Lnode4, *V0Lnode5;
 699
 700   const int kColorVZERO  = kGreen;
 701
 702   Top = gAlice->GetGeometry()->GetNode("alice");
 703
 704   Float_t  height1, height2, height3, height4, height5;
 705   Float_t  height;
 706   Float_t  theta;
 707   Float_t  half_thick_alu;
 708   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
 709   Float_t  half_thick_qua4,half_thick_qua5;
 710   Float_t  zdet;
 711   Float_t  r0, r5;
 712   Float_t  pi = TMath::Pi();
 713   Float_t  thick_alu;
 714
 715 //   height1           =     1.9;
 716 //   height2           =     3.7;
 717 //   height3           =     6.2;
 718 //   height4           =    10.5;
 719 //   height5           =    10.5;
 720
 721   height1           =     2.0;           // height of cell 1, in cm
 722   height2           =     3.2;           // height of cell 2, in cm
 723   height3           =     4.9;           // height of cell 3, in cm
 724   height4           =     7.5;           // height of cell 4, in cm
 725   height5           =    12.0;           // height of cell 5, in cm
 726
 727   theta             = pi/6.0/2.0;
 728   half_thick_alu    = 0.0025;
 729   thick_alu         = 2.0 * half_thick_alu;
 730   half_thick_qua1   = fThickness1/2.0;
 731   half_thick_qua2   = half_thick_qua1  - 0.25;
 732   half_thick_qua3   = half_thick_qua2  - 0.25;
 733   half_thick_qua4   = half_thick_qua3  - 0.25;
 734   half_thick_qua5   = half_thick_qua4  - 0.25;
 735
 736   zdet              =    86.9 +fThickness/2.0;
 737   r0                =    4.0;
 738   height            =    height1 + height2 + height3 + height4 + height5;
 739   r5                =    r0 + height;
 740
 741   Float_t   partube[3];
 742
 743   partube[0] =  r0 - 0.2;
 744   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
 745   partube[2] = fThickness/2.0;
 746
 747   TTUBE *V0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 748
 749   Top->cd();
 750
 751   V0Rnode = new TNode("V0RI","V0RI",V0RI,0.0,0.0,+zdet,0);
 752
 753   V0Rnode->SetLineColor(kBlue);
 754   fNodes->Add(V0Rnode);
 755
 756   V0Rnode->SetVisibility(2);
 757
 758
 759 // Rondelles de carbone (epaisseur 1 mm) de maintien des cellules ...
 760
 761
 762   Float_t   parbox[10];
 763
 764   parbox[0] =    0.;
 765   parbox[1] =  360.;
 766   parbox[2] =    12;
 767   parbox[3] =     2;
 768   parbox[4] =  -0.1/2.0;
 769   parbox[5] =  r0;
 770   parbox[6] =  r5;
 771   parbox[7] =  +0.1/2.0;
 772   parbox[8] =  r0;
 773   parbox[9] =  r5;
 774
 775
 776   TPGON *V0CA = new TPGON("V0CA", "V0CA", "void",parbox[0], parbox[1],
 777                             parbox[2],parbox[3]);
 778
 779   V0CA->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
 780   V0CA->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
 781
 782   V0Rnode->cd();
 783   V0Rnode6 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0, fThickness/2.0-parbox[7],0);
 784   V0Rnode6->SetLineColor(kYellow);
 785   fNodes->Add(V0Rnode6);
 786   V0Rnode->cd();
 787   V0Rnode7 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0,-fThickness/2.0+parbox[7],0);
 788   V0Rnode7->SetLineColor(kYellow);
 789   fNodes->Add(V0Rnode7);
 790
 791   parbox[4] =  -fThickness/2.0;
 792   parbox[5] =  r0 - 0.2;
 793   parbox[6] =  r0;
 794   parbox[7] =  +fThickness/2.0;
 795   parbox[8] =  r0 - 0.2;
 796   parbox[9] =  r0;
 797
 798   TPGON  *V0IR = new TPGON("V0IR","V0IR","void",  parbox[0], parbox[1],
 799                             parbox[2],parbox[3]);
 800   V0IR->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
 801   V0IR->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
 802
 803   V0Rnode->cd();
 804   V0Rnode8 = new TNode("V0IR", "V0IR",V0IR,0.0,0.0,0.0,0);
 805   V0Rnode8->SetLineColor(kYellow);
 806   fNodes->Add(V0Rnode8);
 807
 808   parbox[4] =  -fThickness/2.0;
 809   parbox[5] =  r5;
 810   parbox[6] =  r5 + 1.0;
 811   parbox[7] =  +fThickness/2.0;
 812   parbox[8] =  r5;
 813   parbox[9] =  r5 + 1.0;
 814
 815   TPGON  *V0ER = new TPGON("V0ER","V0ER","void",  parbox[0], parbox[1],
 816                             parbox[2],parbox[3]);
 817   V0ER->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
 818   V0ER->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
 819
 820   V0Rnode->cd();
 821   V0Rnode9 = new TNode("V0ER", "V0ER",V0ER,0.0,0.0,0.0,0);
 822   V0Rnode9->SetLineColor(kYellow);
 823   fNodes->Add(V0Rnode9);
 824
 825   Float_t   dist0;
 826   Float_t   par[11];
 827
 828   dist0     =  r0 + height / 2.0;
 829   thick_alu =  2.0*half_thick_alu;
 830
 831   par[0]    =  half_thick_qua1;
 832   par[1]    =  0.0;
 833   par[2]    =  0.0;
 834   par[3]    =  height / 2.0 ;
 835   par[4]    =  TMath::Tan(theta) * r0;
 836   par[5]    =  TMath::Tan(theta) * r5;
 837   par[6]    =  0.0;
 838   par[7]    =  height / 2.0 ;
 839   par[8]    =  TMath::Tan(theta) * r0;
 840   par[9]    =  TMath::Tan(theta) * r5;
 841   par[10]   =  0.0;
 842
 843   TTRAP *V0R0 = new TTRAP("V0R0", "V0R0", "void", par[0], par[1], par[2], par[3],
 844                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 845
 846   Float_t   dist1;
 847   Float_t   r1;
 848   Float_t   offset;
 849
 850   dist1     =  (- height + height1) /2.0;
 851   r1        =  r0 + height1;
 852   offset    = - fThickness/2.0 + 0.1;
 853
 854   par[0]    =  half_thick_qua1 - thick_alu;
 855   par[3]    =  height1 / 2.0 - thick_alu;
 856   par[4]    =  TMath::Tan(theta) * r0 - thick_alu;
 857   par[5]    =  TMath::Tan(theta) * r1- thick_alu;
 858   par[7]    =  height1 / 2.0 - thick_alu;
 859   par[8]    =  TMath::Tan(theta) * r0 - thick_alu;
 860   par[9]    =  TMath::Tan(theta) * r1 - thick_alu;
 861
 862   TTRAP *V0R1 = new TTRAP("V0R1", "V0R1", "void", par[0], par[1], par[2], par[3],
 863                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 864
 865
 866   Float_t   dist2;
 867   Float_t   r2;
 868
 869   dist2     =    (- height + height2) /2.0 + height1;
 870   r2        =       r1 + height2;
 871
 872   par[0]    =  half_thick_qua2 - thick_alu;
 873   par[3]    =  height2 / 2.0 - thick_alu;
 874   par[4]    =  TMath::Tan(theta) * r1 - thick_alu;
 875   par[5]    =  TMath::Tan(theta) * r2 - thick_alu;
 876   par[7]    =  height2 / 2.0 - thick_alu;
 877   par[8]    =  TMath::Tan(theta) * r1 - thick_alu;
 878   par[9]    =  TMath::Tan(theta) * r2 - thick_alu;
 879
 880
 881   TTRAP *V0R2 = new TTRAP("V0R2", "V0R2", "void", par[0], par[1], par[2], par[3],
 882                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 883
 884
 885   Float_t   dist3;
 886   Float_t   r3;
 887
 888   dist3     =    (- height + height3) /2.0 + height1 + height2;
 889   r3        =       r2 + height3;
 890
 891   par[0]    =  half_thick_qua3 - thick_alu;
 892   par[3]    =  height3 / 2.0 - thick_alu;
 893   par[4]    =  TMath::Tan(theta) * r2 - thick_alu;
 894   par[5]    =  TMath::Tan(theta) * r3 - thick_alu;
 895   par[7]    =  height3 / 2.0 - thick_alu;
 896   par[8]    =  TMath::Tan(theta) * r2 - thick_alu;
 897   par[9]    =  TMath::Tan(theta) * r3 - thick_alu;
 898
 899
 900   TTRAP *V0R3 = new TTRAP("V0R3", "V0R3", "void", par[0], par[1], par[2], par[3],
 901                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 902
 903
 904   Float_t   dist4;
 905   Float_t   r4;
 906
 907   dist4     =    (- height + height4) /2.0 + height1 + height2 + height3;
 908   r4        =       r3 + height4;
 909
 910   par[0]    =  half_thick_qua4 - thick_alu;
 911   par[3]    =  height4 / 2.0 - thick_alu;
 912   par[4]    =  TMath::Tan(theta) * r3 - thick_alu;
 913   par[5]    =  TMath::Tan(theta) * r4 - thick_alu;
 914   par[7]    =  height4 / 2.0 - thick_alu;
 915   par[8]    =  TMath::Tan(theta) * r3 - thick_alu;
 916   par[9]    =  TMath::Tan(theta) * r4 - thick_alu;
 917
 918
 919   TTRAP *V0R4 = new TTRAP("V0R4", "V0R4", "void", par[0], par[1], par[2], par[3],
 920                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 921
 922
 923   Float_t   dist5;
 924
 925   dist5     =    (- height + height5) /2.0 + height1 + height2 + height3 + height4;
 926
 927   par[0]    =  half_thick_qua5 - thick_alu;
 928   par[3]    =  height5 / 2.0 - thick_alu;
 929   par[4]    =  TMath::Tan(theta) * r4 - thick_alu;
 930   par[5]    =  TMath::Tan(theta) * r5 - thick_alu;
 931   par[7]    =  height5 / 2.0 - thick_alu;
 932   par[8]    =  TMath::Tan(theta) * r4 - thick_alu;
 933   par[9]    =  TMath::Tan(theta) * r5 - thick_alu;
 934
 935
 936   TTRAP *V0R5 = new TTRAP("V0R5", "V0R5", "void", par[0], par[1], par[2], par[3],
 937                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 938
 939
 940   Float_t  phi;
 941   Float_t  phi_deg= 180./6.;
 942   Float_t  phi_rad;
 943   Float_t  xdet,ydet;
 944   Int_t    n_detec_R = 1;
 945
 946   char     NameNode[12];
 947
 948
 949   for (phi = 15.0; phi < 360.0; phi = phi + phi_deg)
 950   {
 951
 952     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 953
 954     phi_rad = phi*pi/180.;
 955     xdet = dist0*TMath::Sin(phi_rad);
 956     ydet = dist0*TMath::Cos(phi_rad);
 957
 958
 959     sprintf(NameNode,"SUBDER%d",n_detec_R);
 960
 961     V0Rnode->cd();
 962     V0Rnode0 = new TNode(NameNode,NameNode,V0R0,-xdet,ydet, offset + half_thick_qua1,mat920);
 963     V0Rnode0->SetLineColor(kColorVZERO);
 964     fNodes->Add(V0Rnode0);
 965     n_detec_R++;
 966
 967     sprintf(NameNode,"SUBDER%d",n_detec_R);
 968     V0Rnode0->cd();
 969     V0Rnode1 = new TNode(NameNode,NameNode,V0R1,0.0,dist1, 0.0,0);
 970     V0Rnode1->SetLineColor(kColorVZERO);
 971     fNodes->Add(V0Rnode1);
 972     n_detec_R++;
 973
 974     sprintf(NameNode,"SUBDER%d",n_detec_R);
 975     V0Rnode0->cd();
 976     V0Rnode2 = new TNode(NameNode,NameNode,V0R2,0.0,dist2, - half_thick_qua1 + half_thick_qua2,0);
 977     V0Rnode2->SetLineColor(kColorVZERO);
 978     fNodes->Add(V0Rnode2);
 979     n_detec_R++;
 980
 981
 982     sprintf(NameNode,"SUBDER%d",n_detec_R);
 983     V0Rnode0->cd();
 984     V0Rnode3 = new TNode(NameNode,NameNode,V0R3,0.0,dist3, - half_thick_qua1 + half_thick_qua3,0);
 985     V0Rnode3->SetLineColor(kColorVZERO);
 986     fNodes->Add(V0Rnode3);
 987     n_detec_R++;
 988
 989     sprintf(NameNode,"SUBDER%d",n_detec_R);
 990     V0Rnode0->cd();
 991     V0Rnode4 = new TNode(NameNode,NameNode,V0R4,0.0,dist4, - half_thick_qua1 + half_thick_qua4,0);
 992     V0Rnode4->SetLineColor(kColorVZERO);
 993     fNodes->Add(V0Rnode4);
 994     n_detec_R++;
 995
 996     sprintf(NameNode,"SUBDER%d",n_detec_R);
 997     V0Rnode0->cd();
 998     V0Rnode5 = new TNode(NameNode,NameNode,V0R5,0.0,dist5, - half_thick_qua1 + half_thick_qua5,0);
 999     V0Rnode5->SetLineColor(kColorVZERO);
1000     fNodes->Add(V0Rnode5);
1001     n_detec_R++;
1002
1003     V0Rnode0->SetVisibility(2);
1004
1005   }
1006
1007
1008 // Left side of VZERO :
1009
1010
1011   Float_t   dist0_left;
1012   Float_t   r0_left      =   4.3;
1013   Float_t   height1_left =   2.6;
1014   Float_t   height2_left =   4.1;
1015   Float_t   height3_left =   6.4;
1016   Float_t   height4_left =  10.2;
1017   Float_t   height5_left =  16.9;
1018   Float_t   height_left  = height1_left + height2_left + height3_left
1019                                         + height4_left + height5_left;
1020   Float_t   r5_left      = r0_left  + height_left;
1021
1022   partube[0] =  r0_left;
1023   partube[1] = (r5_left) / TMath::Cos(theta);
1024   partube[2] = fThickness1/2.0;
1025
1026   TTUBE *V0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
1027
1028   Top->cd();
1029
1030   V0Lnode = new TNode("V0LE","V0LE",V0LE,0.0,0.0,-350.0-fThickness1/2.0,0);
1031
1032   V0Lnode->SetLineColor(kBlue);
1033   fNodes->Add(V0Lnode);
1034
1035   V0Lnode->SetVisibility(2);
1036
1037   dist0_left  =  r0_left + height_left / 2.0;
1038   thick_alu   =  2.0*half_thick_alu;
1039
1040   par[0]      =  half_thick_qua1;
1041   par[1]      =  0.0;
1042   par[2]      =  0.0;
1043   par[3]      =  height_left / 2.0 ;
1044   par[4]      =  TMath::Tan(theta) * r0_left;
1045   par[5]      =  TMath::Tan(theta) * r5_left;
1046   par[6]      =  0.0;
1047   par[7]      =  height_left / 2.0 ;
1048   par[8]      =  TMath::Tan(theta) * r0_left;
1049   par[9]      =  TMath::Tan(theta) * r5_left;
1050   par[10]     =  0.0;
1051
1052   TTRAP *V0L0 = new TTRAP("V0L0", "V0L0", "void", par[0], par[1], par[2], par[3],
1053                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1054
1055
1056   Float_t   dist1_left;
1057   Float_t   r1_left;
1058   Float_t   offset_left;
1059
1060   dist1_left     =  (- height_left + height1_left) /2.0;
1061   r1_left        =  r0_left + height1_left;
1062   offset_left    = - fThickness1/2.0 + 0.1;
1063
1064   par[0]    =  half_thick_qua1 - thick_alu;
1065   par[3]    =  height1_left / 2.0 - thick_alu;
1066   par[4]    =  TMath::Tan(theta) * r0_left - thick_alu;
1067   par[5]    =  TMath::Tan(theta) * r1_left- thick_alu;
1068   par[7]    =  height1_left / 2.0 - thick_alu;
1069   par[8]    =  TMath::Tan(theta) * r0_left - thick_alu;
1070   par[9]    =  TMath::Tan(theta) * r1_left - thick_alu;
1071
1072   TTRAP *V0L1 = new TTRAP("V0L1", "V0L1", "void", par[0], par[1], par[2], par[3],
1073                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1074
1075   Float_t   dist2_left;
1076   Float_t   r2_left;
1077
1078   dist2_left     =    (- height_left + height2_left) /2.0 + height1_left;
1079   r2_left        =       r1_left + height2_left;
1080
1081   par[0]    =  half_thick_qua1 - thick_alu;
1082   par[3]    =  height2_left / 2.0 - thick_alu;
1083   par[4]    =  TMath::Tan(theta) * r1_left - thick_alu;
1084   par[5]    =  TMath::Tan(theta) * r2_left - thick_alu;
1085   par[7]    =  height2_left / 2.0 - thick_alu;
1086   par[8]    =  TMath::Tan(theta) * r1_left - thick_alu;
1087   par[9]    =  TMath::Tan(theta) * r2_left - thick_alu;
1088
1089   TTRAP *V0L2 = new TTRAP("V0L2", "V0L2", "void", par[0], par[1], par[2], par[3],
1090                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1091
1092
1093
1094   Float_t   dist3_left;
1095   Float_t   r3_left;
1096
1097   dist3_left     =    (- height_left + height3_left) /2.0 + height1_left + height2_left;
1098   r3_left        =       r2_left + height3_left;
1099
1100   par[0]    =  half_thick_qua1 - thick_alu;
1101   par[3]    =  height3_left / 2.0 - thick_alu;
1102   par[4]    =  TMath::Tan(theta) * r2_left - thick_alu;
1103   par[5]    =  TMath::Tan(theta) * r3_left - thick_alu;
1104   par[7]    =  height3_left / 2.0 - thick_alu;
1105   par[8]    =  TMath::Tan(theta) * r2_left - thick_alu;
1106   par[9]    =  TMath::Tan(theta) * r3_left - thick_alu;
1107
1108   TTRAP *V0L3 = new TTRAP("V0L3", "V0L3", "void", par[0], par[1], par[2], par[3],
1109                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1110
1111
1112   Float_t   dist4_left;
1113   Float_t   r4_left;
1114
1115   dist4_left     =    (- height_left + height4_left) /2.0 + height1_left
1116                                      + height2_left + height3_left;
1117   r4_left        =       r3_left + height4_left;
1118
1119   par[0]    =  half_thick_qua1 - thick_alu;
1120   par[3]    =  height4_left / 2.0 - thick_alu;
1121   par[4]    =  TMath::Tan(theta) * r3_left - thick_alu;
1122   par[5]    =  TMath::Tan(theta) * r4_left - thick_alu;
1123   par[7]    =  height4_left / 2.0 - thick_alu;
1124   par[8]    =  TMath::Tan(theta) * r3_left - thick_alu;
1125   par[9]    =  TMath::Tan(theta) * r4_left - thick_alu;
1126
1127   TTRAP *V0L4 = new TTRAP("V0L4", "V0L4", "void", par[0], par[1], par[2], par[3],
1128                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1129
1130
1131   Float_t   dist5_left;
1132
1133
1134   dist5_left     =    (- height_left + height5_left) /2.0 + height1_left
1135                                      + height2_left + height3_left + height4_left;
1136
1137
1138   par[0]    =  half_thick_qua1 - thick_alu;
1139   par[3]    =  height5_left / 2.0 - thick_alu;
1140   par[4]    =  TMath::Tan(theta) * r4_left - thick_alu;
1141   par[5]    =  TMath::Tan(theta) * r5_left - thick_alu;
1142   par[7]    =  height5_left / 2.0 - thick_alu;
1143   par[8]    =  TMath::Tan(theta) * r4_left - thick_alu;
1144   par[9]    =  TMath::Tan(theta) * r5_left - thick_alu;
1145
1146   TTRAP *V0L5 = new TTRAP("V0L5", "V0L5", "void", par[0], par[1], par[2], par[3],
1147                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1148
1149
1150   Int_t    n_detec_L = 1;
1151
1152   for (phi = 15.0; phi < 360.0; phi = phi + phi_deg)
1153   {
1154
1155     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
1156
1157     phi_rad = phi*pi/180.;
1158     xdet = dist0_left*TMath::Sin(phi_rad);
1159     ydet = dist0_left*TMath::Cos(phi_rad);
1160
1161
1162     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1163
1164     V0Lnode->cd();
1165     V0Lnode0 = new TNode(NameNode,NameNode,V0L0,-xdet,ydet, offset_left + half_thick_qua1,mat920);
1166     V0Lnode0->SetLineColor(kColorVZERO);
1167     fNodes->Add(V0Lnode0);
1168     n_detec_L++;
1169
1170     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1171     V0Lnode0->cd();
1172     V0Lnode1 = new TNode(NameNode,NameNode,V0L1,0.0,dist1_left, 0.0,0);
1173     V0Lnode1->SetLineColor(kColorVZERO);
1174     fNodes->Add(V0Lnode1);
1175     n_detec_L++;
1176
1177     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1178     V0Lnode0->cd();
1179     V0Lnode2 = new TNode(NameNode,NameNode,V0L2,0.0,dist2_left, 0.0,0);
1180     V0Lnode2->SetLineColor(kColorVZERO);
1181     fNodes->Add(V0Lnode2);
1182     n_detec_L++;
1183
1184
1185     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1186     V0Lnode0->cd();
1187     V0Lnode3 = new TNode(NameNode,NameNode,V0L3,0.0,dist3_left, 0.0,0);
1188     V0Lnode3->SetLineColor(kColorVZERO);
1189     fNodes->Add(V0Lnode3);
1190     n_detec_L++;
1191
1192     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1193     V0Lnode0->cd();
1194     V0Lnode4 = new TNode(NameNode,NameNode,V0L4,0.0,dist4_left, 0.0,0);
1195     V0Lnode4->SetLineColor(kColorVZERO);
1196     fNodes->Add(V0Lnode4);
1197     n_detec_L++;
1198
1199     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1200     V0Lnode0->cd();
1201     V0Lnode5 = new TNode(NameNode,NameNode,V0L5,0.0,dist5_left, 0.0,0);
1202     V0Lnode5->SetLineColor(kColorVZERO);
1203     fNodes->Add(V0Lnode5);
1204     n_detec_L++;
1205
1206     V0Lnode0->SetVisibility(2);
1207
1208   }
1209
1210
1211 }
1212
1213
1214 //------------------------------------------------------------------------
1215 void AliVZEROv0::CreateMaterials()
1216 {
1217     Int_t i;
1218
1219     printf("\n");
1220     for(i=0;i<30;i++) printf("*");
1221     printf(" VZERO create materials ");
1222     for(i=0;i<30;i++) printf("*");
1223     printf("\n");
1224
1225
1226     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,
1227                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
1228
1229
1230     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,
1231                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
1232
1233     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
1234                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
1235                                  1.662295, 1.68337 };
1236
1237     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
1238                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
1239
1240     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1241
1242
1243     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1244
1245
1246     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,
1247                                1e-4,1e-4,1e-4,1e-4 };
1248     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1249
1250
1251     Int_t *idtmed = fIdtmed->GetArray()-2999;
1252
1253
1254 //  Parameters related to Quarz (SiO2) :
1255
1256     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
1257     Int_t nlmatqua;
1258
1259     aqua[0]    = 28.09;
1260     aqua[1]    = 16.;
1261     zqua[0]    = 14.;
1262     zqua[1]    = 8.;
1263     densqua    = 2.64;
1264     nlmatqua   = -2;
1265     wmatqua[0] = 1.;
1266     wmatqua[1] = 2.;
1267
1268 // Parameters  related to aluminum sheets :
1269
1270     Float_t  aal   = 26.98;
1271     Float_t  zal   = 13.00;
1272     Float_t  densal=   2.7;
1273     Float_t  radlal=   8.9;
1274
1275 // Parameters  related to scintillator CH :
1276
1277     Float_t ascin[2] = {1.01,12.01};
1278     Float_t zscin[2] = {1,6};
1279     Float_t wscin[2] = {1,1};
1280     Float_t denscin  = 1.03;
1281
1282 //  Definition of materials :
1283
1284     AliMaterial( 1, "AIR A$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
1285     AliMaterial(11, "AIR I$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
1286     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
1287     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
1288     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
1289     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
1290
1291
1292     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
1293
1294
1295     Int_t   ISXFLD = gAlice->Field()->Integ();
1296     Float_t SXMGMX = gAlice->Field()->Max();
1297
1298     Float_t tmaxfd, stemax, deemax, epsil, stmin;
1299
1300     tmaxfd = 10.;
1301     stemax = 0.1;
1302     deemax = 0.1;
1303     epsil  = 0.001;
1304     stmin  = 0.001;
1305
1306     printf(" \n");
1307     printf(" StepQua,    StepAlu    = %f %f \n",fMaxStepQua,fMaxStepAlu);
1308     printf(" DeStepQua,  DeStepAlu  = %f %f \n",fMaxDestepQua,fMaxDestepAlu);
1309     printf(" \n");
1310
1311
1312 //  Active Air :
1313     AliMedium(1, "ACTIVE AIR$", 1, 1, ISXFLD, SXMGMX,
1314               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
1315
1316 //  Inactive air :
1317
1318     AliMedium(11, "INACTIVE AIR$", 11, 0, ISXFLD, SXMGMX,
1319               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
1320
1321     AliMedium(2, "CARBON$ ", 2,  1, ISXFLD, SXMGMX,
1322               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
1323
1324     AliMedium(3, "QUARZ$", 3, 1, ISXFLD, SXMGMX,
1325               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
1326
1327     AliMedium(4,"ALUMINUM1$",4, 1, ISXFLD, SXMGMX,
1328               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
1329
1330
1331     AliMedium(5,"ALUMINUM2$",5, 1, ISXFLD, SXMGMX,
1332               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
1333
1334     AliMedium(6,"SCINTILLATOR$",6, 1, ISXFLD, SXMGMX, 10., .01, 1., .003, .003, 0, 0);
1335
1336     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
1337     gMC->Gstpar(idtmed[3000], "HADR", 1.);
1338     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
1339     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
1340
1341     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
1342     gMC->Gstpar(idtmed[3001], "HADR", 1.);
1343     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
1344     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
1345
1346     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
1347     gMC->Gstpar(idtmed[3002], "HADR", 1.);
1348     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
1349     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
1350     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
1351     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
1352
1353     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
1354     gMC->Gstpar(idtmed[3003], "HADR", 1.);
1355     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
1356     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
1357
1358     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
1359     gMC->Gstpar(idtmed[3004], "HADR", 1.);
1360     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
1361     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
1362     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
1363     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
1364
1365     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
1366     gMC->Gstpar(idtmed[3005], "HADR", 1.);
1367     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
1368     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
1369
1370     gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
1371     gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
1372
1373
1374 }
1375 //---------------------------------------------------------------------
1376 void AliVZEROv0::DrawModule()
1377 {
1378
1379 //  Drawing is done in DrawVZERO.C
1380
1381    Int_t i;
1382
1383    printf("\n");
1384    for(i=0;i<30;i++) printf("*");
1385    printf(" VZERO DrawModule ");
1386    for(i=0;i<30;i++) printf("*");
1387    printf("\n");
1388
1389
1390 }
1391
1392 //-------------------------------------------------------------------
1393 void AliVZEROv0::Init()
1394 {
1395 // Initialises version 0 of the VZERO Detector
1396 // Just prints an information message
1397
1398    printf(" VZERO version %d initialized \n",IsVersion());
1399
1400 //   gMC->SetMaxStep(fMaxStepAlu);
1401 //   gMC->SetMaxStep(fMaxStepQua);
1402
1403 //   AliVZERO::Init();
1404
1405 }
1406
1407 //-------------------------------------------------------------------
1408
1409 void AliVZEROv0::StepManager()
1410 {
1411
1412 //   (Very)Minimal version of StepManager
1413
1414
1415      Int_t  copy;
1416      static Int_t vol[4];
1417      static Float_t hits[15];
1418
1419      TLorentzVector pos;
1420
1421      TLorentzVector mom;
1422      Float_t        theta;
1423      Float_t        phi;
1424      Float_t        kRaddeg = 180/TMath::Pi();
1425      Float_t        RingNumber;
1426
1427      Int_t ipart;
1428
1429
1430 //     TGeant3 *geant3 = (TGeant3*) gMC;
1431 //     Int_t  Nphot = geant3->Gckin2()->ngphot;
1432
1433
1434 //   Only charged tracks :
1435
1436      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
1437
1438
1439      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
1440      vol[2]    = gMC->CurrentVolID(copy);
1441      vol[3]    = copy;
1442
1443      if      ( gMC->CurrentVolID(copy) == gMC->VolId("V0R1") ||
1444                gMC->CurrentVolID(copy) == gMC->VolId("V0L1") )
1445                RingNumber = 1.0;
1446      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R2") ||
1447                gMC->CurrentVolID(copy) == gMC->VolId("V0L2") )
1448                RingNumber = 2.0;
1449      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R3") ||
1450                gMC->CurrentVolID(copy) == gMC->VolId("V0L3") )
1451                RingNumber = 3.0;
1452      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R4") ||
1453                gMC->CurrentVolID(copy) == gMC->VolId("V0L4") )
1454                RingNumber = 4.0;
1455      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R5") ||
1456                gMC->CurrentVolID(copy) == gMC->VolId("V0L5") )
1457                RingNumber = 5.0;
1458      else
1459                RingNumber = 0.0;
1460
1461      if (gMC->IsTrackEntering() && RingNumber > 0.5) {
1462
1463          gMC->TrackPosition(pos);
1464
1465          gMC->TrackMomentum(mom);
1466          Double_t tc   = mom[0]*mom[0]+mom[1]*mom[1];
1467          Double_t Pt   = TMath::Sqrt(tc);
1468          Double_t Pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
1469
1470          theta   = Float_t(TMath::ATan2(Pt,Double_t(mom[2])))*kRaddeg;
1471          phi     = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1472
1473          ipart  = gMC->TrackPid();
1474
1475          hits[0]  = pos[0];
1476          hits[1]  = pos[1];
1477          hits[2]  = pos[2];
1478          hits[3]  =  ipart;
1479
1480 //         Float_t ttime = gMC->TrackTime();
1481 //         hits[4] = ttime*1e9;
1482
1483          hits[4]  = gMC->TrackTime();
1484          hits[5]  = gMC->TrackCharge();
1485          hits[6]  = theta;
1486          hits[7]  = phi;
1487          hits[8]  = RingNumber;
1488
1489          hits[9]  = Pt;
1490          hits[10] = Pmom;
1491          hits[11] = mom[0];
1492          hits[12] = mom[1];
1493          hits[13] = mom[2];
1494
1495
1496          AddHit(gAlice->CurrentTrack(), vol, hits);
1497
1498          }
1499
1500 }
1501
1502 //_____________________________________________________________________________
1503 void AliVZEROv0::AddHit(Int_t track, Int_t *vol, Float_t *hits)
1504 {
1505   //
1506   // Add a VZERO hit
1507   //
1508
1509   TClonesArray &lhits = *fHits;
1510   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
1511 }
1512
1513 //---------------------------------------------------------------------
1514 void AliVZEROv0::AddDigits(Int_t *tracks, Int_t* digits)
1515 {
1516
1517    TClonesArray  &ldigits = *fDigits;
1518    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1519 }
1520
1521 //---------------------------------------------------------------------
1522 void AliVZEROv0::MakeBranch(Option_t *option)
1523 {
1524
1525   // Creates new branches in the current Root Tree
1526
1527
1528   char branchname[10];
1529   sprintf(branchname,"%s",GetName());
1530   printf(" fBufferSize = %d \n",fBufferSize);
1531
1532   const char *H = strstr(option,"H");
1533
1534   if (fHits   && gAlice->TreeH() && H) {
1535     gAlice->TreeH()->Branch(branchname,&fHits, fBufferSize);
1536     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1537   }
1538
1539   const char *D = strstr(option,"D");
1540   //
1541   if (fDigits   && gAlice->TreeD() && D) {
1542     gAlice->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1543     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1544   }
1545
1546 }