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 <iostream.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 <iostream.h>
  51 #include <fstream.h>
  52
  53 #include <TGeant3.h>
  54 #include <stdlib.h>
  55 #include "TObjectTable.h"
  56
  57 #include "AliConst.h"
  58 #include "ABSOSHILConst.h"
  59 #include "ABSOConst.h"
  60 #include "TLorentzVector.h"
  61
  62 ClassImp(AliVZEROv0)
  63
  64 //--------------------------------------------------------------------
  65 AliVZEROv0:: AliVZEROv0():AliVZERO()
  66 {
  67
  68
  69 }
  70 //--------------------------------------------------------------------
  71 AliVZEROv0::AliVZEROv0(const char *name, const char *title):
  72  AliVZERO(name,title)
  73 {
  74
  75 // Standard constructor for V-zeroR Detector (right part)  version 0
  76
  77
  78   Int_t i;
  79
  80   printf("\n");
  81   for(i=0;i<30;i++) printf("*");
  82   printf(" Create VZERO object ");
  83   for(i=0;i<30;i++) printf("*");
  84   printf("\n");
  85
  86 }
  87
  88 //-------------------------------------------------------------------------
  89 void AliVZEROv0::CreateGeometry()
  90 {
  91
  92 // Creates the Geant geometry of the V-zero Detector  version 0
  93
  94
  95   Int_t i;
  96
  97   printf("\n");
  98   for(i=0;i<30;i++) printf("*");
  99   printf(" Create VZERO Geometry ");
 100   for(i=0;i<30;i++) printf("*");
 101   printf("\n");
 102
 103
 104   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 105
 106   Int_t    n_detec_R = 1;
 107   Int_t    n_detec_L = 1;
 108
 109   Int_t    n_cells_R = 1;
 110   Int_t    n_cells_L = 1;
 111
 112   Int_t    idrotm[999];
 113
 114   Float_t  height1, height2, height3, height4, height5;
 115   Float_t  height;
 116   Float_t  theta;
 117   Float_t  half_thick_alu;
 118   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
 119   Float_t  half_thick_qua4,half_thick_qua5;
 120   Float_t  zdet;
 121   Float_t  r0, r5;
 122   Float_t  pi = TMath::Pi();
 123   Float_t  thick_alu;
 124
 125   height1           =     2.0;           // height of cell 1, in cm
 126   height2           =     3.2;           // height of cell 2, in cm
 127   height3           =     4.9;           // height of cell 3, in cm
 128   height4           =     7.5;           // height of cell 4, in cm
 129   height5           =    12.0;           // height of cell 5, in cm
 130
 131   theta             = pi/6.0/2.0;       // half angular opening = 15 degrees
 132   half_thick_alu    = 0.0025;            // half thickness of aluminum foil, in cm
 133   thick_alu         = 2.0 * half_thick_alu;
 134   fThickness1       = 2.5;
 135   half_thick_qua1   = fThickness1/2.0;   // half thickness of WRAPPED quartz cell (inner ring)
 136   half_thick_qua2   = half_thick_qua1  - 0.25;
 137   half_thick_qua3   = half_thick_qua2  - 0.25;
 138   half_thick_qua4   = half_thick_qua3  - 0.25;
 139   half_thick_qua5   = half_thick_qua4  - 0.25;
 140
 141   zdet              =    86.9 +fThickness/2.0;  // distance to vertex (along Z axis)
 142   r0                =    4.0;            // closest distance to center of the beam pipe
 143   height            =    height1 + height2 + height3 + height4 + height5;
 144   r5                =    r0 + height;
 145
 146 //............................................................................
 147
 148 // Here I add the flange which is sitting on beam line
 149 // right in front of V0R detector, and which I found on CERN drawing
 150 // entitled : ALICE BEAM VACCUM CHAMBER - RB26 version III :
 151
 152 //     Float_t   pflange[3];
 153 //
 154 //     pflange[0] = 3.0;
 155 //     pflange[1] = 5.675;
 156 //     pflange[2] = 0.9;
 157 //
 158 //     gMC->Gsvolu("QFA0","TUBE", idtmed[3003], pflange, 3);
 159 //     gMC->Gspos("QFA0", 1 ,"alic", 0.0, 0.0, 85.0+0.9, 0, "ONLY");
 160
 161 //............................................................................
 162
 163
 164 // Creation of mother volume V0LE - left part - :
 165 // Face entree a -350.0 cm ...
 166
 167    Float_t   partube[3];
 168
 169    partube[0] =  4.3;
 170    partube[1] = 45.0;
 171    partube[2] = fThickness1/2.0;
 172
 173    gMC->Gsvolu("V0LE","TUBE",idtmed[3002],partube,3);
 174
 175
 176 // Creation of five rings - left part - :
 177 // Face entree a -350.0 cm ...
 178
 179 // Mother volume V0L0 in which will be set 5 quartz cells
 180
 181
 182   Float_t   par[11];
 183
 184   Float_t   dist0_left;
 185   Float_t   r0_left      =   4.3;
 186   Float_t   height1_left =   2.6;
 187   Float_t   height2_left =   4.1;
 188   Float_t   height3_left =   6.4;
 189   Float_t   height4_left =  10.2;
 190   Float_t   height5_left =  16.9;
 191   Float_t   height_left  = height1_left + height2_left + height3_left
 192                                         + height4_left + height5_left;
 193   Float_t   r5_left      = r0_left  + height_left;
 194
 195
 196   dist0_left  =  r0_left + height_left / 2.0;
 197   thick_alu   =  2.0*half_thick_alu;
 198
 199   par[0]      =  half_thick_qua1;
 200   par[1]      =  0.0;
 201   par[2]      =  0.0;
 202   par[3]      =  height_left / 2.0 ;
 203   par[4]      =  TMath::Tan(theta) * r0_left;
 204   par[5]      =  TMath::Tan(theta) * r5_left;
 205   par[6]      =  0.0;
 206   par[7]      =  height_left / 2.0 ;
 207   par[8]      =  TMath::Tan(theta) * r0_left;
 208   par[9]      =  TMath::Tan(theta) * r5_left;
 209   par[10]     =  0.0;
 210
 211
 212   gMC->Gsvolu("V0L0","TRAP",idtmed[3010],par,11);  // air volume
 213
 214   Float_t   dist1_left;
 215   Float_t   r1_left;
 216   Float_t   offset_left;
 217
 218   dist1_left     =  (- height_left + height1_left) /2.0;
 219   r1_left        =  r0_left + height1_left;
 220   offset_left    = - fThickness1/2.0 + 0.1;
 221
 222   par[0]    =  half_thick_qua1 - thick_alu;
 223   par[3]    =  height1_left / 2.0 - thick_alu;
 224   par[4]    =  TMath::Tan(theta) * r0_left - thick_alu;
 225   par[5]    =  TMath::Tan(theta) * r1_left- thick_alu;
 226   par[7]    =  height1_left / 2.0 - thick_alu;
 227   par[8]    =  TMath::Tan(theta) * r0_left - thick_alu;
 228   par[9]    =  TMath::Tan(theta) * r1_left - thick_alu;
 229
 230
 231   gMC->Gsvolu("V0L1","TRAP",idtmed[3002],par,11);  // quartz volume
 232   gMC->Gspos("V0L1",1,"V0L0", 0.0, dist1_left , 0.0, 0,"ONLY");
 233
 234   Float_t   dist2_left;
 235   Float_t   r2_left;
 236
 237   dist2_left     =    (- height_left + height2_left) /2.0 + height1_left;
 238   r2_left        =       r1_left + height2_left;
 239
 240   par[0]    =  half_thick_qua1 - thick_alu;
 241   par[3]    =  height2_left / 2.0 - thick_alu;
 242   par[4]    =  TMath::Tan(theta) * r1_left - thick_alu;
 243   par[5]    =  TMath::Tan(theta) * r2_left - thick_alu;
 244   par[7]    =  height2_left / 2.0 - thick_alu;
 245   par[8]    =  TMath::Tan(theta) * r1_left - thick_alu;
 246   par[9]    =  TMath::Tan(theta) * r2_left - thick_alu;
 247
 248   gMC->Gsvolu("V0L2","TRAP",idtmed[3002],par,11);  // quartz volume
 249   gMC->Gspos("V0L2",1,"V0L0", 0.0, dist2_left , 0.0, 0,"ONLY");
 250
 251
 252   Float_t   dist3_left;
 253   Float_t   r3_left;
 254
 255   dist3_left     =    (- height_left + height3_left) /2.0 + height1_left + height2_left;
 256   r3_left        =       r2_left + height3_left;
 257
 258   par[0]    =  half_thick_qua1 - thick_alu;
 259   par[3]    =  height3_left / 2.0 - thick_alu;
 260   par[4]    =  TMath::Tan(theta) * r2_left - thick_alu;
 261   par[5]    =  TMath::Tan(theta) * r3_left - thick_alu;
 262   par[7]    =  height3_left / 2.0 - thick_alu;
 263   par[8]    =  TMath::Tan(theta) * r2_left - thick_alu;
 264   par[9]    =  TMath::Tan(theta) * r3_left - thick_alu;
 265
 266   gMC->Gsvolu("V0L3","TRAP",idtmed[3002],par,11);  // quartz volume
 267   gMC->Gspos("V0L3",1,"V0L0", 0.0, dist3_left , 0.0, 0,"ONLY");
 268
 269   Float_t   dist4_left;
 270   Float_t   r4_left;
 271
 272   dist4_left     =    (- height_left + height4_left) /2.0 + height1_left
 273                                      + height2_left + height3_left;
 274   r4_left        =       r3_left + height4_left;
 275
 276   par[0]    =  half_thick_qua1 - thick_alu;
 277   par[3]    =  height4_left / 2.0 - thick_alu;
 278   par[4]    =  TMath::Tan(theta) * r3_left - thick_alu;
 279   par[5]    =  TMath::Tan(theta) * r4_left - thick_alu;
 280   par[7]    =  height4_left / 2.0 - thick_alu;
 281   par[8]    =  TMath::Tan(theta) * r3_left - thick_alu;
 282   par[9]    =  TMath::Tan(theta) * r4_left - thick_alu;
 283
 284   gMC->Gsvolu("V0L4","TRAP",idtmed[3002],par,11);  // quartz volume
 285   gMC->Gspos("V0L4",1,"V0L0", 0.0, dist4_left , 0.0, 0,"ONLY");
 286
 287
 288   Float_t   dist5_left;
 289
 290
 291   dist5_left     =    (- height_left + height5_left) /2.0 + height1_left
 292                                      + height2_left + height3_left + height4_left;
 293
 294
 295   par[0]    =  half_thick_qua1 - thick_alu;
 296   par[3]    =  height5_left / 2.0 - thick_alu;
 297   par[4]    =  TMath::Tan(theta) * r4_left - thick_alu;
 298   par[5]    =  TMath::Tan(theta) * r5_left - thick_alu;
 299   par[7]    =  height5_left / 2.0 - thick_alu;
 300   par[8]    =  TMath::Tan(theta) * r4_left - thick_alu;
 301   par[9]    =  TMath::Tan(theta) * r5_left - thick_alu;
 302
 303   gMC->Gsvolu("V0L5","TRAP",idtmed[3002],par,11);  // quartz volume
 304   gMC->Gspos("V0L5",1,"V0L0", 0.0, dist5_left , 0.0, 0,"ONLY");
 305
 306
 307 //............................................................................
 308
 309 // Creation of mother volume V0RI - right part - :
 310
 311
 312   partube[0] = r0 - 0.2;
 313   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
 314   partube[2] = fThickness/2.0;
 315
 316
 317   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 318
 319 // Creation of  carbon lids (1 mm thick) to keep V0RI box shut...
 320
 321   Float_t   parbox[10];
 322
 323   parbox[0] =    0.;
 324   parbox[1] =  360.;
 325   parbox[2] =    12;
 326   parbox[3] =     2;
 327   parbox[4] =  -0.1/2.0;
 328   parbox[5] =  r0;
 329   parbox[6] =  r5;
 330   parbox[7] =  +0.1/2.0;
 331   parbox[8] =  r0;
 332   parbox[9] =  r5;
 333
 334
 335   gMC->Gsvolu("V0CA","PGON",idtmed[3001],parbox,10);
 336   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-parbox[7],0,"ONLY");
 337   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+parbox[7],0,"ONLY");
 338
 339 // Creation of aluminum rings to maintain the V0RI pieces ...
 340
 341   parbox[4] =  -fThickness/2.0;
 342   parbox[5] =  r0 -0.2;
 343   parbox[6] =  r0;
 344   parbox[7] =  +fThickness/2.0;
 345   parbox[8] =  r0 -0.2;
 346   parbox[9] =  r0;
 347
 348   gMC->Gsvolu("V0IR","PGON",idtmed[3003],parbox,10);
 349   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 350
 351   parbox[4] =  -fThickness/2.0;
 352   parbox[5] =  r5;
 353   parbox[6] =  r5 + 1.0;
 354   parbox[7] =  +fThickness/2.0;
 355   parbox[8] =  r5;
 356   parbox[9] =  r5 + 1.0;
 357
 358   gMC->Gsvolu("V0ER","PGON",idtmed[3003],parbox,10);
 359   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 360
 361 // Mother volume V0R0 in which will be set 5  quartz cells
 362 // each one  WRAPPED in reflecting aluminum :
 363
 364   Float_t   dist0;
 365
 366   dist0     =  r0 + height / 2.0;
 367   thick_alu =  2.0*half_thick_alu;
 368
 369   par[0]    =  half_thick_qua1;
 370   par[1]    =  0.0;
 371   par[2]    =  0.0;
 372   par[3]    =  height / 2.0 ;
 373   par[4]    =  TMath::Tan(theta) * r0;
 374   par[5]    =  TMath::Tan(theta) * r5;
 375   par[6]    =  0.0;
 376   par[7]    =  height / 2.0 ;
 377   par[8]    =  TMath::Tan(theta) * r0;
 378   par[9]    =  TMath::Tan(theta) * r5;
 379   par[10]   =  0.0;
 380
 381
 382   gMC->Gsvolu("V0R0","TRAP",idtmed[3010],par,11);  // air volume
 383
 384 // Elementary cell of ring 1 :
 385
 386   Float_t   dist1;
 387   Float_t   r1;
 388   Float_t   offset;
 389
 390   dist1     =  (- height + height1) /2.0;
 391   r1        =  r0 + height1;
 392   offset    = - fThickness/2.0 + 0.1;
 393
 394   par[0]    =  half_thick_qua1 - thick_alu;
 395   par[3]    =  height1 / 2.0 - thick_alu;
 396   par[4]    =  TMath::Tan(theta) * r0 - thick_alu;
 397   par[5]    =  TMath::Tan(theta) * r1- thick_alu;
 398   par[7]    =  height1 / 2.0 - thick_alu;
 399   par[8]    =  TMath::Tan(theta) * r0 - thick_alu;
 400   par[9]    =  TMath::Tan(theta) * r1 - thick_alu;
 401
 402
 403   gMC->Gsvolu("V0R1","TRAP",idtmed[3002],par,11);  // quartz volume
 404   gMC->Gspos("V0R1",1,"V0R0", 0.0, dist1 , 0.0, 0,"ONLY");
 405
 406   par[0]    =  half_thick_alu;
 407
 408   gMC->Gsvolu("V0A1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 409   gMC->Gspos("V0A1",1,"V0R1",0.0,0.0, - half_thick_qua1 + half_thick_alu,0,"ONLY");
 410   gMC->Gspos("V0A1",2,"V0R1",0.0,0.0, + half_thick_qua1 - half_thick_alu,0,"ONLY");
 411
 412   parbox[0] = half_thick_alu;
 413   parbox[1] = height1 / TMath::Cos(theta)/ 2.0;
 414   parbox[2] = half_thick_qua1;
 415
 416   gMC->Gsvolu("V0A2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 417   Float_t  theta_deg = 180./6./2.0;
 418   Float_t h1;
 419   h1 = TMath::Tan(theta) * (r0 + height1/2.0);
 420   AliMatrix(idrotm[911],90.0,+theta_deg,90.0,90.+theta_deg,0.0,0.);
 421   gMC->Gspos("V0A2",1,"V0R1",-h1 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 422   AliMatrix(idrotm[912],90.0,-theta_deg,90.0,90.-theta_deg,0.0,0.);
 423   gMC->Gspos("V0A2",2,"V0R1",+h1 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 424
 425   parbox[0] = TMath::Tan(theta) * r0;
 426   parbox[1] = half_thick_alu;
 427   parbox[2] = half_thick_qua1;
 428   gMC->Gsvolu("V0A3","BOX",idtmed[3004],parbox,3);
 429   gMC->Gspos("V0A3",1,"V0R1",0.0, - (height1/2.0) + half_thick_alu ,0.0,0,"ONLY");
 430
 431
 432   parbox[0] = TMath::Tan(theta) * (r0 + height1);
 433   parbox[1] = half_thick_alu;
 434   parbox[2] = half_thick_qua1;
 435   gMC->Gsvolu("V0A4","BOX",idtmed[3004],parbox,3);
 436   gMC->Gspos("V0A4",1,"V0R1",0.0, (height1/2.0) - half_thick_alu,0.0,0,"ONLY");
 437
 438
 439 //  Elementary cell of ring 2 :
 440
 441   Float_t   dist2;
 442   Float_t   r2;
 443
 444   dist2     =    (- height + height2) /2.0 + height1;
 445   r2        =       r1 + height2;
 446
 447   par[0]    =  half_thick_qua2 - thick_alu;
 448   par[3]    =  height2 / 2.0 - thick_alu;
 449   par[4]    =  TMath::Tan(theta) * r1 - thick_alu;
 450   par[5]    =  TMath::Tan(theta) * r2 - thick_alu;
 451   par[7]    =  height2 / 2.0 - thick_alu;
 452   par[8]    =  TMath::Tan(theta) * r1 - thick_alu;
 453   par[9]    =  TMath::Tan(theta) * r2 - thick_alu;
 454
 455   gMC->Gsvolu("V0R2","TRAP",idtmed[3002],par,11);  // quartz volume
 456   gMC->Gspos("V0R2",1,"V0R0", 0.0, dist2 , - half_thick_qua1 + half_thick_qua2, 0,"ONLY");
 457
 458   par[0]    =  half_thick_alu;
 459
 460   gMC->Gsvolu("V0B1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 461   gMC->Gspos("V0B1",1,"V0R2",0.0,0.0, - half_thick_qua2 + half_thick_alu,0,"ONLY");
 462   gMC->Gspos("V0B1",2,"V0R2",0.0,0.0, + half_thick_qua2 - half_thick_alu,0,"ONLY");
 463
 464   parbox[0] = half_thick_alu;
 465   parbox[1] = height2 / TMath::Cos(theta)/ 2.0;
 466   parbox[2] = half_thick_qua2;
 467
 468   gMC->Gsvolu("V0B2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 469   Float_t h2;
 470   h2 = TMath::Tan(theta) * (r0  + height1 + height2/2.0);
 471   gMC->Gspos("V0B2",1,"V0R2",-h2 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 472   gMC->Gspos("V0B2",2,"V0R2",+h2 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 473
 474   parbox[0] = TMath::Tan(theta) * (r0 + height1);
 475   parbox[1] = half_thick_alu;
 476   parbox[2] = half_thick_qua2;
 477   gMC->Gsvolu("V0B3","BOX",idtmed[3004],parbox,3);
 478   gMC->Gspos("V0B3",1,"V0R2",0.0, - (height2/2.0) + half_thick_alu ,0.0,0,"ONLY");
 479
 480
 481   parbox[0] = TMath::Tan(theta) * (r0 + height1 +  height2);
 482   parbox[1] = half_thick_alu;
 483   parbox[2] = half_thick_qua2;
 484   gMC->Gsvolu("V0B4","BOX",idtmed[3004],parbox,3);
 485   gMC->Gspos("V0B4",1,"V0R2",0.0, (height2/2.0) - half_thick_alu,0.0,0,"ONLY");
 486
 487
 488 // Elementary cell  ring 3 :
 489
 490   Float_t   dist3;
 491   Float_t   r3;
 492
 493   dist3     =    (- height + height3) /2.0 + height1 + height2;
 494   r3        =       r2 + height3;
 495
 496   par[0]    =  half_thick_qua3 - thick_alu;
 497   par[3]    =  height3 / 2.0 - thick_alu;
 498   par[4]    =  TMath::Tan(theta) * r2 - thick_alu;
 499   par[5]    =  TMath::Tan(theta) * r3 - thick_alu;
 500   par[7]    =  height3 / 2.0 - thick_alu;
 501   par[8]    =  TMath::Tan(theta) * r2 - thick_alu;
 502   par[9]    =  TMath::Tan(theta) * r3 - thick_alu;
 503
 504   gMC->Gsvolu("V0R3","TRAP",idtmed[3002],par,11);  // quartz volume
 505   gMC->Gspos("V0R3",1,"V0R0", 0.0, dist3 , - half_thick_qua1 +  half_thick_qua3, 0,"ONLY");
 506
 507
 508   par[0]    =  half_thick_alu;
 509
 510   gMC->Gsvolu("V0C1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 511   gMC->Gspos("V0C1",1,"V0R3",0.0,0.0, - half_thick_qua3 + half_thick_alu,0,"ONLY");
 512   gMC->Gspos("V0C1",2,"V0R3",0.0,0.0, + half_thick_qua3 - half_thick_alu,0,"ONLY");
 513
 514   parbox[0] = half_thick_alu;
 515   parbox[1] = height3 / TMath::Cos(theta)/ 2.0;
 516   parbox[2] = half_thick_qua3;
 517
 518   gMC->Gsvolu("V0C2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 519   Float_t h3;
 520   h3 = TMath::Tan(theta) * (r0  + height1 + height2 + height3/2.0);
 521   gMC->Gspos("V0C2",1,"V0R3",-h3 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 522   gMC->Gspos("V0C2",2,"V0R3",+h3 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 523
 524   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2);
 525   parbox[1] = half_thick_alu;
 526   parbox[2] = half_thick_qua3;
 527   gMC->Gsvolu("V0C3","BOX",idtmed[3004],parbox,3);
 528   gMC->Gspos("V0C3",1,"V0R3",0.0, - (height3/2.0) + half_thick_alu ,0.0,0,"ONLY");
 529
 530
 531   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
 532   parbox[1] = half_thick_alu;
 533   parbox[2] = half_thick_qua3;
 534   gMC->Gsvolu("V0C4","BOX",idtmed[3004],parbox,3);
 535   gMC->Gspos("V0C4",1,"V0R3",0.0, (height3/2.0) - half_thick_alu,0.0,0,"ONLY");
 536
 537
 538 // Elementary cell  ring 4 :
 539
 540   Float_t   dist4;
 541   Float_t   r4;
 542
 543   dist4     =    (- height + height4) /2.0 + height1 + height2 + height3;
 544   r4        =       r3 + height4;
 545
 546   par[0]    =  half_thick_qua4 - thick_alu;
 547   par[3]    =  height4 / 2.0 - thick_alu;
 548   par[4]    =  TMath::Tan(theta) * r3 - thick_alu;
 549   par[5]    =  TMath::Tan(theta) * r4 - thick_alu;
 550   par[7]    =  height4 / 2.0 - thick_alu;
 551   par[8]    =  TMath::Tan(theta) * r3 - thick_alu;
 552   par[9]    =  TMath::Tan(theta) * r4 - thick_alu;
 553
 554   gMC->Gsvolu("V0R4","TRAP",idtmed[3002],par,11);  // quartz volume
 555   gMC->Gspos("V0R4",1,"V0R0", 0.0, dist4 , - half_thick_qua1 + half_thick_qua4, 0,"ONLY");
 556
 557
 558   par[0]    =  half_thick_alu;
 559
 560   gMC->Gsvolu("V0D1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 561   gMC->Gspos("V0D1",1,"V0R4",0.0,0.0, - half_thick_qua4 + half_thick_alu,0,"ONLY");
 562   gMC->Gspos("V0D1",2,"V0R4",0.0,0.0, + half_thick_qua4 - half_thick_alu,0,"ONLY");
 563
 564   parbox[0] = half_thick_alu;
 565   parbox[1] = height4 / TMath::Cos(theta)/ 2.0;
 566   parbox[2] = half_thick_qua4;
 567
 568   gMC->Gsvolu("V0D2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 569   Float_t h4;
 570   h4 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4/2.0);
 571   gMC->Gspos("V0D2",1,"V0R4",-h4 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 572   gMC->Gspos("V0D2",2,"V0R4",+h4 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 573
 574   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
 575   parbox[1] = half_thick_alu;
 576   parbox[2] = half_thick_qua4;
 577   gMC->Gsvolu("V0D3","BOX",idtmed[3004],parbox,3);
 578   gMC->Gspos("V0D3",1,"V0R4",0.0, - (height4/2.0) + half_thick_alu ,0.0,0,"ONLY");
 579
 580
 581   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
 582   parbox[1] = half_thick_alu;
 583   parbox[2] = half_thick_qua4;
 584   gMC->Gsvolu("V0D4","BOX",idtmed[3004],parbox,3);
 585   gMC->Gspos("V0D4",1,"V0R4",0.0, (height4/2.0) - half_thick_alu,0.0,0,"ONLY");
 586
 587
 588 // Elementary cell  ring 5 :
 589
 590   Float_t   dist5;
 591
 592   dist5     =    (- height + height5) /2.0 + height1 + height2 + height3 + height4;
 593
 594   par[0]    =  half_thick_qua5 - thick_alu;
 595   par[3]    =  height5 / 2.0 - thick_alu;
 596   par[4]    =  TMath::Tan(theta) * r4 - thick_alu;
 597   par[5]    =  TMath::Tan(theta) * r5 - thick_alu;
 598   par[7]    =  height5 / 2.0 - thick_alu;
 599   par[8]    =  TMath::Tan(theta) * r4 - thick_alu;
 600   par[9]    =  TMath::Tan(theta) * r5 - thick_alu;
 601
 602   gMC->Gsvolu("V0R5","TRAP",idtmed[3002],par,11);  // quartz volume
 603   gMC->Gspos("V0R5",1,"V0R0", 0.0, dist5 , - half_thick_qua1 +  half_thick_qua5, 0,"ONLY");
 604
 605
 606   par[0]    =  half_thick_alu;
 607
 608   gMC->Gsvolu("V0E1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 609   gMC->Gspos("V0E1",1,"V0R5",0.0,0.0, - half_thick_qua5 + half_thick_alu,0,"ONLY");
 610   gMC->Gspos("V0E1",2,"V0R5",0.0,0.0, + half_thick_qua5 - half_thick_alu,0,"ONLY");
 611
 612   parbox[0] = half_thick_alu;
 613   parbox[1] = height5 / TMath::Cos(theta)/ 2.0;
 614   parbox[2] = half_thick_qua5;
 615
 616   gMC->Gsvolu("V0E2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 617   Float_t h5;
 618   h5 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4 + height5/2.0);
 619   gMC->Gspos("V0E2",1,"V0R5",-h5 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 620   gMC->Gspos("V0E2",2,"V0R5",+h5 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 621
 622   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
 623   parbox[1] = half_thick_alu;
 624   parbox[2] = half_thick_qua5;
 625   gMC->Gsvolu("V0E3","BOX",idtmed[3004],parbox,3);
 626   gMC->Gspos("V0E3",1,"V0R5",0.0, - (height5/2.0) + half_thick_alu ,0.0,0,"ONLY");
 627
 628
 629   parbox[0] = TMath::Tan(theta) * r5;
 630   parbox[1] = half_thick_alu;
 631   parbox[2] = half_thick_qua5;
 632   gMC->Gsvolu("V0E4","BOX",idtmed[3004],parbox,3);
 633   gMC->Gspos("V0E4",1,"V0R5",0.0, (height5/2.0) - half_thick_alu,0.0,0,"ONLY");
 634
 635
 636   Float_t  phi_rad ;
 637   Float_t  phi_deg = 180./6.;
 638
 639  // Partie de droite :
 640
 641   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phi_deg)
 642       {
 643         phi_rad = phi*pi/180.;
 644         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 645         gMC->Gspos("V0R0",n_detec_R,"V0RI",-dist0*TMath::Sin(phi_rad),
 646                           dist0*TMath::Cos(phi_rad),offset + half_thick_qua1,idrotm[902],"ONLY");
 647         n_detec_R++;
 648        }
 649
 650
 651   gMC->Gspos("V0RI",1,"alic",0.0,0.0,zdet,0,"ONLY");
 652
 653   n_cells_R = (n_detec_R - 1) * 5;
 654   printf(" \n\n\n");
 655   printf("    Number of cells on Right side =   %d\n",  n_cells_R);
 656
 657 // Partie de gauche :
 658
 659   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phi_deg)
 660       {
 661         phi_rad = phi*pi/180.;
 662         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 663         gMC->Gspos("V0L0",n_detec_L,"V0LE",-dist0_left*TMath::Sin(phi_rad),
 664                           dist0_left*TMath::Cos(phi_rad),offset_left + half_thick_qua1,idrotm[902],"ONLY");
 665         n_detec_L++;
 666        }
 667
 668
 669   gMC->Gspos("V0LE",1,"alic",0.0,0.0,-350.0-fThickness1/2.0,0,"ONLY");
 670
 671   n_cells_L = (n_detec_L - 1) * 5;
 672   printf(" \n\n\n");
 673   printf("    Number of cells on Left side  =   %d\n\n",  n_cells_L);
 674
 675
 676 }
 677
 678
 679
 680 //_____________________________________________________________________________
 681 void AliVZEROv0::BuildGeometry()
 682 {
 683
 684   // Builds simple ROOT TNode geometry for event display
 685
 686
 687   Int_t i;
 688
 689   printf("\n");
 690   for(i=0;i<30;i++) printf("*");
 691   printf(" VZERO BuildGeometry ");
 692   for(i=0;i<30;i++) printf("*");
 693   printf("\n");
 694
 695   TNode *Top;
 696
 697   TNode *V0Rnode, *V0Rnode0, *V0Rnode6 , *V0Rnode7, *V0Rnode8, *V0Rnode9;
 698   TNode *V0Rnode1, *V0Rnode2, *V0Rnode3, *V0Rnode4, *V0Rnode5;
 699   TNode *V0Lnode, *V0Lnode0;
 700   TNode *V0Lnode1, *V0Lnode2, *V0Lnode3, *V0Lnode4, *V0Lnode5;
 701
 702   const int kColorVZERO  = kGreen;
 703
 704   Top = gAlice->GetGeometry()->GetNode("alice");
 705
 706   Float_t  height1, height2, height3, height4, height5;
 707   Float_t  height;
 708   Float_t  theta;
 709   Float_t  half_thick_alu;
 710   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
 711   Float_t  half_thick_qua4,half_thick_qua5;
 712   Float_t  zdet;
 713   Float_t  r0, r5;
 714   Float_t  pi = TMath::Pi();
 715   Float_t  thick_alu;
 716
 717 //   height1           =     1.9;
 718 //   height2           =     3.7;
 719 //   height3           =     6.2;
 720 //   height4           =    10.5;
 721 //   height5           =    10.5;
 722
 723   height1           =     2.0;           // height of cell 1, in cm
 724   height2           =     3.2;           // height of cell 2, in cm
 725   height3           =     4.9;           // height of cell 3, in cm
 726   height4           =     7.5;           // height of cell 4, in cm
 727   height5           =    12.0;           // height of cell 5, in cm
 728
 729   theta             = pi/6.0/2.0;
 730   half_thick_alu    = 0.0025;
 731   thick_alu         = 2.0 * half_thick_alu;
 732   half_thick_qua1   = fThickness1/2.0;
 733   half_thick_qua2   = half_thick_qua1  - 0.25;
 734   half_thick_qua3   = half_thick_qua2  - 0.25;
 735   half_thick_qua4   = half_thick_qua3  - 0.25;
 736   half_thick_qua5   = half_thick_qua4  - 0.25;
 737
 738   zdet              =    86.9 +fThickness/2.0;
 739   r0                =    4.0;
 740   height            =    height1 + height2 + height3 + height4 + height5;
 741   r5                =    r0 + height;
 742
 743   Float_t   partube[3];
 744
 745   partube[0] =  r0 - 0.2;
 746   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
 747   partube[2] = fThickness/2.0;
 748
 749   TTUBE *V0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 750
 751   Top->cd();
 752
 753   V0Rnode = new TNode("V0RI","V0RI",V0RI,0.0,0.0,+zdet,0);
 754
 755   V0Rnode->SetLineColor(kBlue);
 756   fNodes->Add(V0Rnode);
 757
 758   V0Rnode->SetVisibility(2);
 759
 760
 761 // Rondelles de carbone (epaisseur 1 mm) de maintien des cellules ...
 762
 763
 764   Float_t   parbox[10];
 765
 766   parbox[0] =    0.;
 767   parbox[1] =  360.;
 768   parbox[2] =    12;
 769   parbox[3] =     2;
 770   parbox[4] =  -0.1/2.0;
 771   parbox[5] =  r0;
 772   parbox[6] =  r5;
 773   parbox[7] =  +0.1/2.0;
 774   parbox[8] =  r0;
 775   parbox[9] =  r5;
 776
 777
 778   TPGON *V0CA = new TPGON("V0CA", "V0CA", "void",parbox[0], parbox[1],
 779                             parbox[2],parbox[3]);
 780
 781   V0CA->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
 782   V0CA->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
 783
 784   V0Rnode->cd();
 785   V0Rnode6 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0, fThickness/2.0-parbox[7],0);
 786   V0Rnode6->SetLineColor(kYellow);
 787   fNodes->Add(V0Rnode6);
 788   V0Rnode->cd();
 789   V0Rnode7 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0,-fThickness/2.0+parbox[7],0);
 790   V0Rnode7->SetLineColor(kYellow);
 791   fNodes->Add(V0Rnode7);
 792
 793   parbox[4] =  -fThickness/2.0;
 794   parbox[5] =  r0 - 0.2;
 795   parbox[6] =  r0;
 796   parbox[7] =  +fThickness/2.0;
 797   parbox[8] =  r0 - 0.2;
 798   parbox[9] =  r0;
 799
 800   TPGON  *V0IR = new TPGON("V0IR","V0IR","void",  parbox[0], parbox[1],
 801                             parbox[2],parbox[3]);
 802   V0IR->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
 803   V0IR->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
 804
 805   V0Rnode->cd();
 806   V0Rnode8 = new TNode("V0IR", "V0IR",V0IR,0.0,0.0,0.0,0);
 807   V0Rnode8->SetLineColor(kYellow);
 808   fNodes->Add(V0Rnode8);
 809
 810   parbox[4] =  -fThickness/2.0;
 811   parbox[5] =  r5;
 812   parbox[6] =  r5 + 1.0;
 813   parbox[7] =  +fThickness/2.0;
 814   parbox[8] =  r5;
 815   parbox[9] =  r5 + 1.0;
 816
 817   TPGON  *V0ER = new TPGON("V0ER","V0ER","void",  parbox[0], parbox[1],
 818                             parbox[2],parbox[3]);
 819   V0ER->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
 820   V0ER->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
 821
 822   V0Rnode->cd();
 823   V0Rnode9 = new TNode("V0ER", "V0ER",V0ER,0.0,0.0,0.0,0);
 824   V0Rnode9->SetLineColor(kYellow);
 825   fNodes->Add(V0Rnode9);
 826
 827   Float_t   dist0;
 828   Float_t   par[11];
 829
 830   dist0     =  r0 + height / 2.0;
 831   thick_alu =  2.0*half_thick_alu;
 832
 833   par[0]    =  half_thick_qua1;
 834   par[1]    =  0.0;
 835   par[2]    =  0.0;
 836   par[3]    =  height / 2.0 ;
 837   par[4]    =  TMath::Tan(theta) * r0;
 838   par[5]    =  TMath::Tan(theta) * r5;
 839   par[6]    =  0.0;
 840   par[7]    =  height / 2.0 ;
 841   par[8]    =  TMath::Tan(theta) * r0;
 842   par[9]    =  TMath::Tan(theta) * r5;
 843   par[10]   =  0.0;
 844
 845   TTRAP *V0R0 = new TTRAP("V0R0", "V0R0", "void", par[0], par[1], par[2], par[3],
 846                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 847
 848   Float_t   dist1;
 849   Float_t   r1;
 850   Float_t   offset;
 851
 852   dist1     =  (- height + height1) /2.0;
 853   r1        =  r0 + height1;
 854   offset    = - fThickness/2.0 + 0.1;
 855
 856   par[0]    =  half_thick_qua1 - thick_alu;
 857   par[3]    =  height1 / 2.0 - thick_alu;
 858   par[4]    =  TMath::Tan(theta) * r0 - thick_alu;
 859   par[5]    =  TMath::Tan(theta) * r1- thick_alu;
 860   par[7]    =  height1 / 2.0 - thick_alu;
 861   par[8]    =  TMath::Tan(theta) * r0 - thick_alu;
 862   par[9]    =  TMath::Tan(theta) * r1 - thick_alu;
 863
 864   TTRAP *V0R1 = new TTRAP("V0R1", "V0R1", "void", par[0], par[1], par[2], par[3],
 865                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 866
 867
 868   Float_t   dist2;
 869   Float_t   r2;
 870
 871   dist2     =    (- height + height2) /2.0 + height1;
 872   r2        =       r1 + height2;
 873
 874   par[0]    =  half_thick_qua2 - thick_alu;
 875   par[3]    =  height2 / 2.0 - thick_alu;
 876   par[4]    =  TMath::Tan(theta) * r1 - thick_alu;
 877   par[5]    =  TMath::Tan(theta) * r2 - thick_alu;
 878   par[7]    =  height2 / 2.0 - thick_alu;
 879   par[8]    =  TMath::Tan(theta) * r1 - thick_alu;
 880   par[9]    =  TMath::Tan(theta) * r2 - thick_alu;
 881
 882
 883   TTRAP *V0R2 = new TTRAP("V0R2", "V0R2", "void", par[0], par[1], par[2], par[3],
 884                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 885
 886
 887   Float_t   dist3;
 888   Float_t   r3;
 889
 890   dist3     =    (- height + height3) /2.0 + height1 + height2;
 891   r3        =       r2 + height3;
 892
 893   par[0]    =  half_thick_qua3 - thick_alu;
 894   par[3]    =  height3 / 2.0 - thick_alu;
 895   par[4]    =  TMath::Tan(theta) * r2 - thick_alu;
 896   par[5]    =  TMath::Tan(theta) * r3 - thick_alu;
 897   par[7]    =  height3 / 2.0 - thick_alu;
 898   par[8]    =  TMath::Tan(theta) * r2 - thick_alu;
 899   par[9]    =  TMath::Tan(theta) * r3 - thick_alu;
 900
 901
 902   TTRAP *V0R3 = new TTRAP("V0R3", "V0R3", "void", par[0], par[1], par[2], par[3],
 903                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 904
 905
 906   Float_t   dist4;
 907   Float_t   r4;
 908
 909   dist4     =    (- height + height4) /2.0 + height1 + height2 + height3;
 910   r4        =       r3 + height4;
 911
 912   par[0]    =  half_thick_qua4 - thick_alu;
 913   par[3]    =  height4 / 2.0 - thick_alu;
 914   par[4]    =  TMath::Tan(theta) * r3 - thick_alu;
 915   par[5]    =  TMath::Tan(theta) * r4 - thick_alu;
 916   par[7]    =  height4 / 2.0 - thick_alu;
 917   par[8]    =  TMath::Tan(theta) * r3 - thick_alu;
 918   par[9]    =  TMath::Tan(theta) * r4 - thick_alu;
 919
 920
 921   TTRAP *V0R4 = new TTRAP("V0R4", "V0R4", "void", par[0], par[1], par[2], par[3],
 922                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 923
 924
 925   Float_t   dist5;
 926
 927   dist5     =    (- height + height5) /2.0 + height1 + height2 + height3 + height4;
 928
 929   par[0]    =  half_thick_qua5 - thick_alu;
 930   par[3]    =  height5 / 2.0 - thick_alu;
 931   par[4]    =  TMath::Tan(theta) * r4 - thick_alu;
 932   par[5]    =  TMath::Tan(theta) * r5 - thick_alu;
 933   par[7]    =  height5 / 2.0 - thick_alu;
 934   par[8]    =  TMath::Tan(theta) * r4 - thick_alu;
 935   par[9]    =  TMath::Tan(theta) * r5 - thick_alu;
 936
 937
 938   TTRAP *V0R5 = new TTRAP("V0R5", "V0R5", "void", par[0], par[1], par[2], par[3],
 939                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 940
 941
 942   Float_t  phi;
 943   Float_t  phi_deg= 180./6.;
 944   Float_t  phi_rad;
 945   Float_t  xdet,ydet;
 946   Int_t    n_detec_R = 1;
 947
 948   char     NameNode[12];
 949
 950
 951   for (phi = 15.0; phi < 360.0; phi = phi + phi_deg)
 952   {
 953
 954     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 955
 956     phi_rad = phi*pi/180.;
 957     xdet = dist0*TMath::Sin(phi_rad);
 958     ydet = dist0*TMath::Cos(phi_rad);
 959
 960
 961     sprintf(NameNode,"SUBDER%d",n_detec_R);
 962
 963     V0Rnode->cd();
 964     V0Rnode0 = new TNode(NameNode,NameNode,V0R0,-xdet,ydet, offset + half_thick_qua1,mat920);
 965     V0Rnode0->SetLineColor(kColorVZERO);
 966     fNodes->Add(V0Rnode0);
 967     n_detec_R++;
 968
 969     sprintf(NameNode,"SUBDER%d",n_detec_R);
 970     V0Rnode0->cd();
 971     V0Rnode1 = new TNode(NameNode,NameNode,V0R1,0.0,dist1, 0.0,0);
 972     V0Rnode1->SetLineColor(kColorVZERO);
 973     fNodes->Add(V0Rnode1);
 974     n_detec_R++;
 975
 976     sprintf(NameNode,"SUBDER%d",n_detec_R);
 977     V0Rnode0->cd();
 978     V0Rnode2 = new TNode(NameNode,NameNode,V0R2,0.0,dist2, - half_thick_qua1 + half_thick_qua2,0);
 979     V0Rnode2->SetLineColor(kColorVZERO);
 980     fNodes->Add(V0Rnode2);
 981     n_detec_R++;
 982
 983
 984     sprintf(NameNode,"SUBDER%d",n_detec_R);
 985     V0Rnode0->cd();
 986     V0Rnode3 = new TNode(NameNode,NameNode,V0R3,0.0,dist3, - half_thick_qua1 + half_thick_qua3,0);
 987     V0Rnode3->SetLineColor(kColorVZERO);
 988     fNodes->Add(V0Rnode3);
 989     n_detec_R++;
 990
 991     sprintf(NameNode,"SUBDER%d",n_detec_R);
 992     V0Rnode0->cd();
 993     V0Rnode4 = new TNode(NameNode,NameNode,V0R4,0.0,dist4, - half_thick_qua1 + half_thick_qua4,0);
 994     V0Rnode4->SetLineColor(kColorVZERO);
 995     fNodes->Add(V0Rnode4);
 996     n_detec_R++;
 997
 998     sprintf(NameNode,"SUBDER%d",n_detec_R);
 999     V0Rnode0->cd();
1000     V0Rnode5 = new TNode(NameNode,NameNode,V0R5,0.0,dist5, - half_thick_qua1 + half_thick_qua5,0);
1001     V0Rnode5->SetLineColor(kColorVZERO);
1002     fNodes->Add(V0Rnode5);
1003     n_detec_R++;
1004
1005     V0Rnode0->SetVisibility(2);
1006
1007   }
1008
1009
1010 // Left side of VZERO :
1011
1012
1013   Float_t   dist0_left;
1014   Float_t   r0_left      =   4.3;
1015   Float_t   height1_left =   2.6;
1016   Float_t   height2_left =   4.1;
1017   Float_t   height3_left =   6.4;
1018   Float_t   height4_left =  10.2;
1019   Float_t   height5_left =  16.9;
1020   Float_t   height_left  = height1_left + height2_left + height3_left
1021                                         + height4_left + height5_left;
1022   Float_t   r5_left      = r0_left  + height_left;
1023
1024   partube[0] =  r0_left;
1025   partube[1] = (r5_left) / TMath::Cos(theta);
1026   partube[2] = fThickness1/2.0;
1027
1028   TTUBE *V0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
1029
1030   Top->cd();
1031
1032   V0Lnode = new TNode("V0LE","V0LE",V0LE,0.0,0.0,-350.0-fThickness1/2.0,0);
1033
1034   V0Lnode->SetLineColor(kBlue);
1035   fNodes->Add(V0Lnode);
1036
1037   V0Lnode->SetVisibility(2);
1038
1039   dist0_left  =  r0_left + height_left / 2.0;
1040   thick_alu   =  2.0*half_thick_alu;
1041
1042   par[0]      =  half_thick_qua1;
1043   par[1]      =  0.0;
1044   par[2]      =  0.0;
1045   par[3]      =  height_left / 2.0 ;
1046   par[4]      =  TMath::Tan(theta) * r0_left;
1047   par[5]      =  TMath::Tan(theta) * r5_left;
1048   par[6]      =  0.0;
1049   par[7]      =  height_left / 2.0 ;
1050   par[8]      =  TMath::Tan(theta) * r0_left;
1051   par[9]      =  TMath::Tan(theta) * r5_left;
1052   par[10]     =  0.0;
1053
1054   TTRAP *V0L0 = new TTRAP("V0L0", "V0L0", "void", par[0], par[1], par[2], par[3],
1055                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1056
1057
1058   Float_t   dist1_left;
1059   Float_t   r1_left;
1060   Float_t   offset_left;
1061
1062   dist1_left     =  (- height_left + height1_left) /2.0;
1063   r1_left        =  r0_left + height1_left;
1064   offset_left    = - fThickness1/2.0 + 0.1;
1065
1066   par[0]    =  half_thick_qua1 - thick_alu;
1067   par[3]    =  height1_left / 2.0 - thick_alu;
1068   par[4]    =  TMath::Tan(theta) * r0_left - thick_alu;
1069   par[5]    =  TMath::Tan(theta) * r1_left- thick_alu;
1070   par[7]    =  height1_left / 2.0 - thick_alu;
1071   par[8]    =  TMath::Tan(theta) * r0_left - thick_alu;
1072   par[9]    =  TMath::Tan(theta) * r1_left - thick_alu;
1073
1074   TTRAP *V0L1 = new TTRAP("V0L1", "V0L1", "void", par[0], par[1], par[2], par[3],
1075                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1076
1077   Float_t   dist2_left;
1078   Float_t   r2_left;
1079
1080   dist2_left     =    (- height_left + height2_left) /2.0 + height1_left;
1081   r2_left        =       r1_left + height2_left;
1082
1083   par[0]    =  half_thick_qua1 - thick_alu;
1084   par[3]    =  height2_left / 2.0 - thick_alu;
1085   par[4]    =  TMath::Tan(theta) * r1_left - thick_alu;
1086   par[5]    =  TMath::Tan(theta) * r2_left - thick_alu;
1087   par[7]    =  height2_left / 2.0 - thick_alu;
1088   par[8]    =  TMath::Tan(theta) * r1_left - thick_alu;
1089   par[9]    =  TMath::Tan(theta) * r2_left - thick_alu;
1090
1091   TTRAP *V0L2 = new TTRAP("V0L2", "V0L2", "void", par[0], par[1], par[2], par[3],
1092                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1093
1094
1095
1096   Float_t   dist3_left;
1097   Float_t   r3_left;
1098
1099   dist3_left     =    (- height_left + height3_left) /2.0 + height1_left + height2_left;
1100   r3_left        =       r2_left + height3_left;
1101
1102   par[0]    =  half_thick_qua1 - thick_alu;
1103   par[3]    =  height3_left / 2.0 - thick_alu;
1104   par[4]    =  TMath::Tan(theta) * r2_left - thick_alu;
1105   par[5]    =  TMath::Tan(theta) * r3_left - thick_alu;
1106   par[7]    =  height3_left / 2.0 - thick_alu;
1107   par[8]    =  TMath::Tan(theta) * r2_left - thick_alu;
1108   par[9]    =  TMath::Tan(theta) * r3_left - thick_alu;
1109
1110   TTRAP *V0L3 = new TTRAP("V0L3", "V0L3", "void", par[0], par[1], par[2], par[3],
1111                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1112
1113
1114   Float_t   dist4_left;
1115   Float_t   r4_left;
1116
1117   dist4_left     =    (- height_left + height4_left) /2.0 + height1_left
1118                                      + height2_left + height3_left;
1119   r4_left        =       r3_left + height4_left;
1120
1121   par[0]    =  half_thick_qua1 - thick_alu;
1122   par[3]    =  height4_left / 2.0 - thick_alu;
1123   par[4]    =  TMath::Tan(theta) * r3_left - thick_alu;
1124   par[5]    =  TMath::Tan(theta) * r4_left - thick_alu;
1125   par[7]    =  height4_left / 2.0 - thick_alu;
1126   par[8]    =  TMath::Tan(theta) * r3_left - thick_alu;
1127   par[9]    =  TMath::Tan(theta) * r4_left - thick_alu;
1128
1129   TTRAP *V0L4 = new TTRAP("V0L4", "V0L4", "void", par[0], par[1], par[2], par[3],
1130                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1131
1132
1133   Float_t   dist5_left;
1134
1135
1136   dist5_left     =    (- height_left + height5_left) /2.0 + height1_left
1137                                      + height2_left + height3_left + height4_left;
1138
1139
1140   par[0]    =  half_thick_qua1 - thick_alu;
1141   par[3]    =  height5_left / 2.0 - thick_alu;
1142   par[4]    =  TMath::Tan(theta) * r4_left - thick_alu;
1143   par[5]    =  TMath::Tan(theta) * r5_left - thick_alu;
1144   par[7]    =  height5_left / 2.0 - thick_alu;
1145   par[8]    =  TMath::Tan(theta) * r4_left - thick_alu;
1146   par[9]    =  TMath::Tan(theta) * r5_left - thick_alu;
1147
1148   TTRAP *V0L5 = new TTRAP("V0L5", "V0L5", "void", par[0], par[1], par[2], par[3],
1149                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1150
1151
1152   Int_t    n_detec_L = 1;
1153
1154   for (phi = 15.0; phi < 360.0; phi = phi + phi_deg)
1155   {
1156
1157     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
1158
1159     phi_rad = phi*pi/180.;
1160     xdet = dist0_left*TMath::Sin(phi_rad);
1161     ydet = dist0_left*TMath::Cos(phi_rad);
1162
1163
1164     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1165
1166     V0Lnode->cd();
1167     V0Lnode0 = new TNode(NameNode,NameNode,V0L0,-xdet,ydet, offset_left + half_thick_qua1,mat920);
1168     V0Lnode0->SetLineColor(kColorVZERO);
1169     fNodes->Add(V0Lnode0);
1170     n_detec_L++;
1171
1172     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1173     V0Lnode0->cd();
1174     V0Lnode1 = new TNode(NameNode,NameNode,V0L1,0.0,dist1_left, 0.0,0);
1175     V0Lnode1->SetLineColor(kColorVZERO);
1176     fNodes->Add(V0Lnode1);
1177     n_detec_L++;
1178
1179     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1180     V0Lnode0->cd();
1181     V0Lnode2 = new TNode(NameNode,NameNode,V0L2,0.0,dist2_left, 0.0,0);
1182     V0Lnode2->SetLineColor(kColorVZERO);
1183     fNodes->Add(V0Lnode2);
1184     n_detec_L++;
1185
1186
1187     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1188     V0Lnode0->cd();
1189     V0Lnode3 = new TNode(NameNode,NameNode,V0L3,0.0,dist3_left, 0.0,0);
1190     V0Lnode3->SetLineColor(kColorVZERO);
1191     fNodes->Add(V0Lnode3);
1192     n_detec_L++;
1193
1194     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1195     V0Lnode0->cd();
1196     V0Lnode4 = new TNode(NameNode,NameNode,V0L4,0.0,dist4_left, 0.0,0);
1197     V0Lnode4->SetLineColor(kColorVZERO);
1198     fNodes->Add(V0Lnode4);
1199     n_detec_L++;
1200
1201     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1202     V0Lnode0->cd();
1203     V0Lnode5 = new TNode(NameNode,NameNode,V0L5,0.0,dist5_left, 0.0,0);
1204     V0Lnode5->SetLineColor(kColorVZERO);
1205     fNodes->Add(V0Lnode5);
1206     n_detec_L++;
1207
1208     V0Lnode0->SetVisibility(2);
1209
1210   }
1211
1212
1213 }
1214
1215
1216 //------------------------------------------------------------------------
1217 void AliVZEROv0::CreateMaterials()
1218 {
1219     Int_t i;
1220
1221     printf("\n");
1222     for(i=0;i<30;i++) printf("*");
1223     printf(" VZERO create materials ");
1224     for(i=0;i<30;i++) printf("*");
1225     printf("\n");
1226
1227
1228     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,
1229                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
1230
1231
1232     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,
1233                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
1234
1235     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
1236                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
1237                                  1.662295, 1.68337 };
1238
1239     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
1240                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
1241
1242     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1243
1244
1245     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1246
1247
1248     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,
1249                                1e-4,1e-4,1e-4,1e-4 };
1250     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1251
1252
1253     Int_t *idtmed = fIdtmed->GetArray()-2999;
1254
1255     TGeant3 *geant3 = (TGeant3*) gMC;
1256
1257 //  Parameters related to Quarz (SiO2) :
1258
1259     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
1260     Int_t nlmatqua;
1261
1262     aqua[0]    = 28.09;
1263     aqua[1]    = 16.;
1264     zqua[0]    = 14.;
1265     zqua[1]    = 8.;
1266     densqua    = 2.64;
1267     nlmatqua   = -2;
1268     wmatqua[0] = 1.;
1269     wmatqua[1] = 2.;
1270
1271 // Parameters  related to aluminum sheets :
1272
1273     Float_t  aal   = 26.98;
1274     Float_t  zal   = 13.00;
1275     Float_t  densal=   2.7;
1276     Float_t  radlal=   8.9;
1277
1278 // Parameters  related to scintillator CH :
1279
1280     Float_t ascin[2] = {1.01,12.01};
1281     Float_t zscin[2] = {1,6};
1282     Float_t wscin[2] = {1,1};
1283     Float_t denscin  = 1.03;
1284
1285 //  Definition of materials :
1286
1287     AliMaterial( 1, "AIR A$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
1288     AliMaterial(11, "AIR I$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
1289     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
1290     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
1291     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
1292     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
1293
1294
1295     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
1296
1297
1298     Int_t   ISXFLD = gAlice->Field()->Integ();
1299     Float_t SXMGMX = gAlice->Field()->Max();
1300
1301     Float_t tmaxfd, stemax, deemax, epsil, stmin;
1302
1303     tmaxfd = 10.;
1304     stemax = 0.1;
1305     deemax = 0.1;
1306     epsil  = 0.001;
1307     stmin  = 0.001;
1308
1309     printf(" \n");
1310     printf(" StepQua,    StepAlu    = %f %f \n",fMaxStepQua,fMaxStepAlu);
1311     printf(" DeStepQua,  DeStepAlu  = %f %f \n",fMaxDestepQua,fMaxDestepAlu);
1312     printf(" \n");
1313
1314
1315 //  Active Air :
1316     AliMedium(1, "ACTIVE AIR$", 1, 1, ISXFLD, SXMGMX,
1317               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
1318
1319 //  Inactive air :
1320
1321     AliMedium(11, "INACTIVE AIR$", 11, 0, ISXFLD, SXMGMX,
1322               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
1323
1324     AliMedium(2, "CARBON$ ", 2,  1, ISXFLD, SXMGMX,
1325               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);
1326
1327     AliMedium(3, "QUARZ$", 3, 1, ISXFLD, SXMGMX,
1328               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
1329
1330     AliMedium(4,"ALUMINUM1$",4, 1, ISXFLD, SXMGMX,
1331               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
1332
1333
1334     AliMedium(5,"ALUMINUM2$",5, 1, ISXFLD, SXMGMX,
1335               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
1336
1337     AliMedium(6,"SCINTILLATOR$",6, 1, ISXFLD, SXMGMX, 10., .01, 1., .003, .003, 0, 0);
1338
1339     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
1340     gMC->Gstpar(idtmed[3000], "HADR", 1.);
1341     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
1342     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
1343
1344     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
1345     gMC->Gstpar(idtmed[3001], "HADR", 1.);
1346     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
1347     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
1348
1349     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
1350     gMC->Gstpar(idtmed[3002], "HADR", 1.);
1351     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
1352     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
1353     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ;
1354     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
1355
1356     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
1357     gMC->Gstpar(idtmed[3003], "HADR", 1.);
1358     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
1359     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
1360
1361     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
1362     gMC->Gstpar(idtmed[3004], "HADR", 1.);
1363     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
1364     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
1365     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ;
1366     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
1367
1368     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
1369     gMC->Gstpar(idtmed[3005], "HADR", 1.);
1370     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
1371     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
1372
1373     geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
1374     geant3->Gsckov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
1375
1376
1377 }
1378 //---------------------------------------------------------------------
1379 void AliVZEROv0::DrawModule()
1380 {
1381
1382 //  Drawing is done in DrawVZERO.C
1383
1384    Int_t i;
1385
1386    printf("\n");
1387    for(i=0;i<30;i++) printf("*");
1388    printf(" VZERO DrawModule ");
1389    for(i=0;i<30;i++) printf("*");
1390    printf("\n");
1391
1392
1393 }
1394
1395 //-------------------------------------------------------------------
1396 void AliVZEROv0::Init()
1397 {
1398 // Initialises version 0 of the VZERO Detector
1399 // Just prints an information message
1400
1401    printf(" VZERO version %d initialized \n",IsVersion());
1402
1403 //   gMC->SetMaxStep(fMaxStepAlu);
1404 //   gMC->SetMaxStep(fMaxStepQua);
1405
1406 //   AliVZERO::Init();
1407
1408 }
1409
1410 //-------------------------------------------------------------------
1411
1412 void AliVZEROv0::StepManager()
1413 {
1414
1415 //   (Very)Minimal version of StepManager
1416
1417
1418      Int_t  copy;
1419      static Int_t vol[4];
1420      static Float_t hits[15];
1421
1422      TLorentzVector pos;
1423
1424      TLorentzVector mom;
1425      Float_t        theta;
1426      Float_t        phi;
1427      Float_t        kRaddeg = 180/TMath::Pi();
1428      Float_t        RingNumber;
1429
1430      Int_t ipart;
1431
1432
1433 //     TGeant3 *geant3 = (TGeant3*) gMC;
1434 //     Int_t  Nphot = geant3->Gckin2()->ngphot;
1435
1436
1437 //   Only charged tracks :
1438
1439      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
1440
1441
1442      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
1443      vol[2]    = gMC->CurrentVolID(copy);
1444      vol[3]    = copy;
1445
1446      if      ( gMC->CurrentVolID(copy) == gMC->VolId("V0R1") ||
1447                gMC->CurrentVolID(copy) == gMC->VolId("V0L1") )
1448                RingNumber = 1.0;
1449      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R2") ||
1450                gMC->CurrentVolID(copy) == gMC->VolId("V0L2") )
1451                RingNumber = 2.0;
1452      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R3") ||
1453                gMC->CurrentVolID(copy) == gMC->VolId("V0L3") )
1454                RingNumber = 3.0;
1455      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R4") ||
1456                gMC->CurrentVolID(copy) == gMC->VolId("V0L4") )
1457                RingNumber = 4.0;
1458      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R5") ||
1459                gMC->CurrentVolID(copy) == gMC->VolId("V0L5") )
1460                RingNumber = 5.0;
1461      else
1462                RingNumber = 0.0;
1463
1464      if (gMC->IsTrackEntering() && RingNumber > 0.5) {
1465
1466          gMC->TrackPosition(pos);
1467
1468          gMC->TrackMomentum(mom);
1469          Double_t tc   = mom[0]*mom[0]+mom[1]*mom[1];
1470          Double_t Pt   = TMath::Sqrt(tc);
1471          Double_t Pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
1472
1473          theta   = Float_t(TMath::ATan2(Pt,Double_t(mom[2])))*kRaddeg;
1474          phi     = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1475
1476          ipart  = gMC->TrackPid();
1477
1478          hits[0]  = pos[0];
1479          hits[1]  = pos[1];
1480          hits[2]  = pos[2];
1481          hits[3]  =  ipart;
1482
1483 //         Float_t ttime = gMC->TrackTime();
1484 //         hits[4] = ttime*1e9;
1485
1486          hits[4]  = gMC->TrackTime();
1487          hits[5]  = gMC->TrackCharge();
1488          hits[6]  = theta;
1489          hits[7]  = phi;
1490          hits[8]  = RingNumber;
1491
1492          hits[9]  = Pt;
1493          hits[10] = Pmom;
1494          hits[11] = mom[0];
1495          hits[12] = mom[1];
1496          hits[13] = mom[2];
1497
1498
1499          AddHit(gAlice->CurrentTrack(), vol, hits);
1500
1501          }
1502
1503 }
1504
1505 //_____________________________________________________________________________
1506 void AliVZEROv0::AddHit(Int_t track, Int_t *vol, Float_t *hits)
1507 {
1508   //
1509   // Add a VZERO hit
1510   //
1511
1512   TClonesArray &lhits = *fHits;
1513   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
1514 }
1515
1516 //---------------------------------------------------------------------
1517 void AliVZEROv0::AddDigits(Int_t *tracks, Int_t* digits)
1518 {
1519
1520    TClonesArray  &ldigits = *fDigits;
1521    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1522 }
1523
1524 //---------------------------------------------------------------------
1525 void AliVZEROv0::MakeBranch(Option_t *option)
1526 {
1527
1528   // Creates new branches in the current Root Tree
1529
1530
1531   char branchname[10];
1532   sprintf(branchname,"%s",GetName());
1533   printf(" fBufferSize = %d \n",fBufferSize);
1534
1535   char *H = strstr(option,"H");
1536
1537   if (fHits   && gAlice->TreeH() && H) {
1538     gAlice->TreeH()->Branch(branchname,&fHits, fBufferSize);
1539     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1540   }
1541
1542   char *D = strstr(option,"D");
1543   //
1544   if (fDigits   && gAlice->TreeD() && D) {
1545     gAlice->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1546     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1547   }
1548
1549 }