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