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 //                                                                  //
  20 //  (V-zero) detector  version 0  as designed by the Lyon group     //
  21 //   All comments should be sent to Brigitte CHEYNIS :              //
  22 //                                  b.cheynis@ipnl.in2p3.fr         //
  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 "AliMC.h"
  47 #include "AliVZEROhit.h"
  48 #include "AliVZEROdigit.h"
  49 #include <iostream.h>
  50 #include <fstream.h>
  51
  52 #include <TGeant3.h>
  53 #include <stdlib.h>
  54 #include "TObjectTable.h"
  55
  56 #include "AliConst.h"
  57 #include "ABSOSHILConst.h"
  58 #include "ABSOConst.h"
  59
  60 ClassImp(AliVZEROv0)
  61
  62 //--------------------------------------------------------------------
  63 AliVZEROv0:: AliVZEROv0():AliVZERO()
  64 {
  65   fRootFile = 0;
  66   fhMultiplicity = 0;
  67   fhGEANTcode = 0;
  68   fhCerenkov = 0;
  69   fhToF = 0;
  70 }
  71 //--------------------------------------------------------------------
  72 AliVZEROv0::AliVZEROv0(const char *name, const char *title):
  73  AliVZERO(name,title)
  74 {
  75
  76 // Standard constructor for V-zeroR Detector (right part)  version 0
  77
  78
  79   Int_t i;
  80
  81   printf("\n");
  82   for(i=0;i<35;i++) printf("*");
  83   printf(" create VZERO object");
  84   for(i=0;i<35;i++) printf("*");
  85   printf("\n");
  86
  87 }
  88 //-------------------------------------------------------------------------
  89 void AliVZEROv0::CreateGeometry()
  90 {
  91
  92 // Creates the Geant geometry of the V-zeroR Detector (right part) version 0
  93
  94
  95   Int_t i;
  96
  97   printf("\n");
  98   for(i=0;i<35;i++) printf("*");
  99   printf(" VZERO Create Geometry ");
 100   for(i=0;i<35;i++) printf("*");
 101   printf("\n");
 102
 103
 104   Int_t    *idtmed = fIdtmed->GetArray()-2999;
 105
 106   Int_t    n_detec = 1;
 107   Int_t    n_cells = 1;
 108
 109   Int_t    idrotm[999];
 110
 111   Float_t  height1, height2, height3, height4, height5;
 112   Float_t  height;
 113   Float_t  theta;
 114   Float_t  half_thick_alu;
 115   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
 116   Float_t  half_thick_qua4,half_thick_qua5;
 117   Float_t  zdet;
 118   Float_t  r0, r5;
 119   Float_t  pi = TMath::Pi();
 120   Float_t  thick_alu;
 121
 122   height1           =     2.3;           // height of cell 1, in cm
 123   height2           =     3.7;           // height of cell 2, in cm
 124   height3           =     6.2;           // height of cell 3, in cm
 125   height4           =    10.5;           // height of cell 4, in cm
 126   height5           =    10.5;           // height of cell 5, in cm
 127
 128   theta             = pi/12.0/2.0;       // half angular opening = 7.5 degrees
 129   half_thick_alu    = 0.0025;            // half thickness of aluminum foil, in cm
 130   thick_alu         = 2.0 * half_thick_alu;
 131   half_thick_qua1   = fThickness1/2.0;   // half thickness of WRAPPED quartz cell (inner ring)
 132   half_thick_qua2   = half_thick_qua1  - 0.25;
 133   half_thick_qua3   = half_thick_qua2  - 0.25;
 134   half_thick_qua4   = half_thick_qua3  - 0.25;
 135   half_thick_qua5   = half_thick_qua4  - 0.25;
 136
 137   zdet              =    86.9 +fThickness/2.0;  // distance to vertex (along Z axis)
 138   r0                =    3.4;            // closest distance to center of the beam pipe
 139   height            =    height1 + height2 + height3 + height4 + height5;
 140   r5                =    r0 + height;
 141
 142
 143 // Creation of mother volume V0RI :
 144
 145   Float_t   partube[3];
 146
 147   partube[0] = r0 - 0.2;
 148   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
 149   partube[2] = fThickness/2.0;
 150
 151
 152   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
 153
 154 // Creation of  carbon lids (1 mm thick) to keep V0RI box shut...
 155
 156   Float_t   parbox[10];
 157
 158   parbox[0] =    0.;
 159   parbox[1] =  360.;
 160   parbox[2] =    24;
 161   parbox[3] =     2;
 162   parbox[4] =  -0.1/2.0;
 163   parbox[5] =  r0;
 164   parbox[6] =  r5;
 165   parbox[7] =  +0.1/2.0;
 166   parbox[8] =  r0;
 167   parbox[9] =  r5;
 168
 169
 170   gMC->Gsvolu("V0CA","PGON",idtmed[3001],parbox,10);
 171   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-parbox[7],0,"ONLY");
 172   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+parbox[7],0,"ONLY");
 173
 174 // Creation of aluminum rings to maintain the V0RI pieces ...
 175
 176   parbox[4] =  -fThickness/2.0;
 177   parbox[5] =  r0 -0.2;
 178   parbox[6] =  r0;
 179   parbox[7] =  +fThickness/2.0;
 180   parbox[8] =  r0 -0.2;
 181   parbox[9] =  r0;
 182
 183   gMC->Gsvolu("V0IR","PGON",idtmed[3003],parbox,10);
 184   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 185
 186   parbox[4] =  -fThickness/2.0;
 187   parbox[5] =  r5;
 188   parbox[6] =  r5 + 1.0;
 189   parbox[7] =  +fThickness/2.0;
 190   parbox[8] =  r5;
 191   parbox[9] =  r5 + 1.0;
 192
 193   gMC->Gsvolu("V0ER","PGON",idtmed[3003],parbox,10);
 194   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
 195
 196 // Mother volume V0R0 in which will be set 5  quartz cells
 197 // each one  WRAPPED in reflecting aluminum :
 198
 199   Float_t   dist0;
 200   Float_t   par[11];
 201
 202   dist0     =  r0 + height / 2.0;
 203   thick_alu =  2.0*half_thick_alu;
 204
 205   par[0]    =  half_thick_qua1;
 206   par[1]    =  0.0;
 207   par[2]    =  0.0;
 208   par[3]    =  height / 2.0 ;
 209   par[4]    =  TMath::Tan(theta) * r0;
 210   par[5]    =  TMath::Tan(theta) * r5;
 211   par[6]    =  0.0;
 212   par[7]    =  height / 2.0 ;
 213   par[8]    =  TMath::Tan(theta) * r0;
 214   par[9]    =  TMath::Tan(theta) * r5;
 215   par[10]   =  0.0;
 216
 217
 218   gMC->Gsvolu("V0R0","TRAP",idtmed[3010],par,11);  // air volume
 219
 220 // Elementary cell of ring 1 :
 221
 222   Float_t   dist1;
 223   Float_t   r1;
 224   Float_t   offset;
 225
 226   dist1     =  (- height + height1) /2.0;
 227   r1        =  r0 + height1;
 228   offset    = - fThickness/2.0 + 0.1;
 229
 230   par[0]    =  half_thick_qua1 - thick_alu;
 231   par[3]    =  height1 / 2.0 - thick_alu;
 232   par[4]    =  TMath::Tan(theta) * r0 - thick_alu;
 233   par[5]    =  TMath::Tan(theta) * r1- thick_alu;
 234   par[7]    =  height1 / 2.0 - thick_alu;
 235   par[8]    =  TMath::Tan(theta) * r0 - thick_alu;
 236   par[9]    =  TMath::Tan(theta) * r1 - thick_alu;
 237
 238
 239   gMC->Gsvolu("V0R1","TRAP",idtmed[3002],par,11);  // quartz volume
 240   gMC->Gspos("V0R1",1,"V0R0", 0.0, dist1 , 0.0, 0,"ONLY");
 241
 242   par[0]    =  half_thick_alu;
 243
 244   gMC->Gsvolu("V0A1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 245   gMC->Gspos("V0A1",1,"V0R1",0.0,0.0, - half_thick_qua1 + half_thick_alu,0,"ONLY");
 246   gMC->Gspos("V0A1",2,"V0R1",0.0,0.0, + half_thick_qua1 - half_thick_alu,0,"ONLY");
 247
 248   parbox[0] = half_thick_alu;
 249   parbox[1] = height1 / TMath::Cos(theta)/ 2.0;
 250   parbox[2] = half_thick_qua1;
 251
 252   gMC->Gsvolu("V0A2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 253   Float_t  theta_deg = 180./12./2.0;
 254   Float_t h1;
 255   h1 = TMath::Tan(theta) * (r0 + height1/2.0);
 256   AliMatrix(idrotm[911],90.0,+theta_deg,90.0,90.+theta_deg,0.0,0.);
 257   gMC->Gspos("V0A2",1,"V0R1",-h1 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 258   AliMatrix(idrotm[912],90.0,-theta_deg,90.0,90.-theta_deg,0.0,0.);
 259   gMC->Gspos("V0A2",2,"V0R1",+h1 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 260
 261   parbox[0] = TMath::Tan(theta) * r0;
 262   parbox[1] = half_thick_alu;
 263   parbox[2] = half_thick_qua1;
 264   gMC->Gsvolu("V0A3","BOX",idtmed[3004],parbox,3);
 265   gMC->Gspos("V0A3",1,"V0R1",0.0, - (height1/2.0) + half_thick_alu ,0.0,0,"ONLY");
 266
 267
 268   parbox[0] = TMath::Tan(theta) * (r0 + height1);
 269   parbox[1] = half_thick_alu;
 270   parbox[2] = half_thick_qua1;
 271   gMC->Gsvolu("V0A4","BOX",idtmed[3004],parbox,3);
 272   gMC->Gspos("V0A4",1,"V0R1",0.0, (height1/2.0) - half_thick_alu,0.0,0,"ONLY");
 273
 274
 275 //  Elementary cell of ring 2 :
 276
 277   Float_t   dist2;
 278   Float_t   r2;
 279
 280   dist2     =    (- height + height2) /2.0 + height1;
 281   r2        =       r1 + height2;
 282
 283   par[0]    =  half_thick_qua2 - thick_alu;
 284   par[3]    =  height2 / 2.0 - thick_alu;
 285   par[4]    =  TMath::Tan(theta) * r1 - thick_alu;
 286   par[5]    =  TMath::Tan(theta) * r2 - thick_alu;
 287   par[7]    =  height2 / 2.0 - thick_alu;
 288   par[8]    =  TMath::Tan(theta) * r1 - thick_alu;
 289   par[9]    =  TMath::Tan(theta) * r2 - thick_alu;
 290
 291   gMC->Gsvolu("V0R2","TRAP",idtmed[3002],par,11);  // quartz volume
 292   gMC->Gspos("V0R2",1,"V0R0", 0.0, dist2 , - half_thick_qua1 + half_thick_qua2, 0,"ONLY");
 293
 294   par[0]    =  half_thick_alu;
 295
 296   gMC->Gsvolu("V0B1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 297   gMC->Gspos("V0B1",1,"V0R2",0.0,0.0, - half_thick_qua2 + half_thick_alu,0,"ONLY");
 298   gMC->Gspos("V0B1",2,"V0R2",0.0,0.0, + half_thick_qua2 - half_thick_alu,0,"ONLY");
 299
 300   parbox[0] = half_thick_alu;
 301   parbox[1] = height2 / TMath::Cos(theta)/ 2.0;
 302   parbox[2] = half_thick_qua2;
 303
 304   gMC->Gsvolu("V0B2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 305   Float_t h2;
 306   h2 = TMath::Tan(theta) * (r0  + height1 + height2/2.0);
 307   gMC->Gspos("V0B2",1,"V0R2",-h2 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 308   gMC->Gspos("V0B2",2,"V0R2",+h2 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 309
 310   parbox[0] = TMath::Tan(theta) * (r0 + height1);
 311   parbox[1] = half_thick_alu;
 312   parbox[2] = half_thick_qua2;
 313   gMC->Gsvolu("V0B3","BOX",idtmed[3004],parbox,3);
 314   gMC->Gspos("V0B3",1,"V0R2",0.0, - (height2/2.0) + half_thick_alu ,0.0,0,"ONLY");
 315
 316
 317   parbox[0] = TMath::Tan(theta) * (r0 + height1 +  height2);
 318   parbox[1] = half_thick_alu;
 319   parbox[2] = half_thick_qua2;
 320   gMC->Gsvolu("V0B4","BOX",idtmed[3004],parbox,3);
 321   gMC->Gspos("V0B4",1,"V0R2",0.0, (height2/2.0) - half_thick_alu,0.0,0,"ONLY");
 322
 323
 324 // Elementary cell  ring 3 :
 325
 326   Float_t   dist3;
 327   Float_t   r3;
 328
 329   dist3     =    (- height + height3) /2.0 + height1 + height2;
 330   r3        =       r2 + height3;
 331
 332   par[0]    =  half_thick_qua3 - thick_alu;
 333   par[3]    =  height3 / 2.0 - thick_alu;
 334   par[4]    =  TMath::Tan(theta) * r2 - thick_alu;
 335   par[5]    =  TMath::Tan(theta) * r3 - thick_alu;
 336   par[7]    =  height3 / 2.0 - thick_alu;
 337   par[8]    =  TMath::Tan(theta) * r2 - thick_alu;
 338   par[9]    =  TMath::Tan(theta) * r3 - thick_alu;
 339
 340   gMC->Gsvolu("V0R3","TRAP",idtmed[3002],par,11);  // quartz volume
 341   gMC->Gspos("V0R3",1,"V0R0", 0.0, dist3 , - half_thick_qua1 +  half_thick_qua3, 0,"ONLY");
 342
 343
 344   par[0]    =  half_thick_alu;
 345
 346   gMC->Gsvolu("V0C1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 347   gMC->Gspos("V0C1",1,"V0R3",0.0,0.0, - half_thick_qua3 + half_thick_alu,0,"ONLY");
 348   gMC->Gspos("V0C1",2,"V0R3",0.0,0.0, + half_thick_qua3 - half_thick_alu,0,"ONLY");
 349
 350   parbox[0] = half_thick_alu;
 351   parbox[1] = height3 / TMath::Cos(theta)/ 2.0;
 352   parbox[2] = half_thick_qua3;
 353
 354   gMC->Gsvolu("V0C2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 355   Float_t h3;
 356   h3 = TMath::Tan(theta) * (r0  + height1 + height2 + height3/2.0);
 357   gMC->Gspos("V0C2",1,"V0R3",-h3 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 358   gMC->Gspos("V0C2",2,"V0R3",+h3 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 359
 360   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2);
 361   parbox[1] = half_thick_alu;
 362   parbox[2] = half_thick_qua3;
 363   gMC->Gsvolu("V0C3","BOX",idtmed[3004],parbox,3);
 364   gMC->Gspos("V0C3",1,"V0R3",0.0, - (height3/2.0) + half_thick_alu ,0.0,0,"ONLY");
 365
 366
 367   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
 368   parbox[1] = half_thick_alu;
 369   parbox[2] = half_thick_qua3;
 370   gMC->Gsvolu("V0C4","BOX",idtmed[3004],parbox,3);
 371   gMC->Gspos("V0C4",1,"V0R3",0.0, (height3/2.0) - half_thick_alu,0.0,0,"ONLY");
 372
 373
 374 // Elementary cell  ring 4 :
 375
 376   Float_t   dist4;
 377   Float_t   r4;
 378
 379   dist4     =    (- height + height4) /2.0 + height1 + height2 + height3;
 380   r4        =       r3 + height4;
 381
 382   par[0]    =  half_thick_qua4 - thick_alu;
 383   par[3]    =  height4 / 2.0 - thick_alu;
 384   par[4]    =  TMath::Tan(theta) * r3 - thick_alu;
 385   par[5]    =  TMath::Tan(theta) * r4 - thick_alu;
 386   par[7]    =  height4 / 2.0 - thick_alu;
 387   par[8]    =  TMath::Tan(theta) * r3 - thick_alu;
 388   par[9]    =  TMath::Tan(theta) * r4 - thick_alu;
 389
 390   gMC->Gsvolu("V0R4","TRAP",idtmed[3002],par,11);  // quartz volume
 391   gMC->Gspos("V0R4",1,"V0R0", 0.0, dist4 , - half_thick_qua1 + half_thick_qua4, 0,"ONLY");
 392
 393
 394   par[0]    =  half_thick_alu;
 395
 396   gMC->Gsvolu("V0D1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 397   gMC->Gspos("V0D1",1,"V0R4",0.0,0.0, - half_thick_qua4 + half_thick_alu,0,"ONLY");
 398   gMC->Gspos("V0D1",2,"V0R4",0.0,0.0, + half_thick_qua4 - half_thick_alu,0,"ONLY");
 399
 400   parbox[0] = half_thick_alu;
 401   parbox[1] = height4 / TMath::Cos(theta)/ 2.0;
 402   parbox[2] = half_thick_qua4;
 403
 404   gMC->Gsvolu("V0D2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 405   Float_t h4;
 406   h4 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4/2.0);
 407   gMC->Gspos("V0D2",1,"V0R4",-h4 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 408   gMC->Gspos("V0D2",2,"V0R4",+h4 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 409
 410   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
 411   parbox[1] = half_thick_alu;
 412   parbox[2] = half_thick_qua4;
 413   gMC->Gsvolu("V0D3","BOX",idtmed[3004],parbox,3);
 414   gMC->Gspos("V0D3",1,"V0R4",0.0, - (height4/2.0) + half_thick_alu ,0.0,0,"ONLY");
 415
 416
 417   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
 418   parbox[1] = half_thick_alu;
 419   parbox[2] = half_thick_qua4;
 420   gMC->Gsvolu("V0D4","BOX",idtmed[3004],parbox,3);
 421   gMC->Gspos("V0D4",1,"V0R4",0.0, (height4/2.0) - half_thick_alu,0.0,0,"ONLY");
 422
 423
 424 // Elementary cell  ring 5 :
 425
 426   Float_t   dist5;
 427
 428   dist5     =    (- height + height5) /2.0 + height1 + height2 + height3 + height4;
 429
 430   par[0]    =  half_thick_qua5 - thick_alu;
 431   par[3]    =  height5 / 2.0 - thick_alu;
 432   par[4]    =  TMath::Tan(theta) * r4 - thick_alu;
 433   par[5]    =  TMath::Tan(theta) * r5 - thick_alu;
 434   par[7]    =  height5 / 2.0 - thick_alu;
 435   par[8]    =  TMath::Tan(theta) * r4 - thick_alu;
 436   par[9]    =  TMath::Tan(theta) * r5 - thick_alu;
 437
 438   gMC->Gsvolu("V0R5","TRAP",idtmed[3002],par,11);  // quartz volume
 439   gMC->Gspos("V0R5",1,"V0R0", 0.0, dist5 , - half_thick_qua1 +  half_thick_qua5, 0,"ONLY");
 440
 441
 442   par[0]    =  half_thick_alu;
 443
 444   gMC->Gsvolu("V0E1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
 445   gMC->Gspos("V0E1",1,"V0R5",0.0,0.0, - half_thick_qua5 + half_thick_alu,0,"ONLY");
 446   gMC->Gspos("V0E1",2,"V0R5",0.0,0.0, + half_thick_qua5 - half_thick_alu,0,"ONLY");
 447
 448   parbox[0] = half_thick_alu;
 449   parbox[1] = height5 / TMath::Cos(theta)/ 2.0;
 450   parbox[2] = half_thick_qua5;
 451
 452   gMC->Gsvolu("V0E2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
 453   Float_t h5;
 454   h5 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4 + height5/2.0);
 455   gMC->Gspos("V0E2",1,"V0R5",-h5 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY");
 456   gMC->Gspos("V0E2",2,"V0R5",+h5 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY");
 457
 458   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
 459   parbox[1] = half_thick_alu;
 460   parbox[2] = half_thick_qua5;
 461   gMC->Gsvolu("V0E3","BOX",idtmed[3004],parbox,3);
 462   gMC->Gspos("V0E3",1,"V0R5",0.0, - (height5/2.0) + half_thick_alu ,0.0,0,"ONLY");
 463
 464
 465   parbox[0] = TMath::Tan(theta) * r5;
 466   parbox[1] = half_thick_alu;
 467   parbox[2] = half_thick_qua5;
 468   gMC->Gsvolu("V0E4","BOX",idtmed[3004],parbox,3);
 469   gMC->Gspos("V0E4",1,"V0R5",0.0, (height5/2.0) - half_thick_alu,0.0,0,"ONLY");
 470
 471
 472   Float_t  phi_rad ;
 473   Float_t  phi_deg = 180./12.;
 474
 475
 476   for(Float_t  phi = 7.5; phi < 360.0; phi = phi + phi_deg)
 477       {
 478         phi_rad = phi*pi/180.;
 479         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
 480         gMC->Gspos("V0R0",n_detec,"V0RI",-dist0*TMath::Sin(phi_rad),
 481                           dist0*TMath::Cos(phi_rad),offset + half_thick_qua1,idrotm[902],"ONLY");
 482         n_detec++;
 483        }
 484
 485
 486   gMC->Gspos("V0RI",1,"alic",0.0,0.0,zdet,0,"ONLY");
 487
 488   n_cells = (n_detec - 1) * 5;
 489   printf(" \n\n\n");
 490   printf(" Number of cells =   %d\n\n",  n_cells);
 491
 492 }
 493
 494
 495 //_____________________________________________________________________________
 496 void AliVZEROv0::BuildGeometry()
 497 {
 498
 499   // Builds simple ROOT TNode geometry for event display
 500
 501
 502   Int_t i;
 503
 504   printf("\n");
 505   for(i=0;i<35;i++) printf("*");
 506   printf(" VZERO BuildGeometry ");
 507   for(i=0;i<35;i++) printf("*");
 508   printf("\n");
 509
 510   TNode *Top, *Node0, *Node1, *Node2;
 511   TNode *Node3, *Node4 , *Node5, *Node6 , *Node7;
 512   TNode *V0Rnode, *V0Rnode0, *V0Rnode6 , *V0Rnode7, *V0Rnode8, *V0Rnode9;
 513   TNode *V0Rnode1, *V0Rnode2, *V0Rnode3, *V0Rnode4, *V0Rnode5;
 514   const int kColorVZERO  = kGreen;
 515
 516   Top = gAlice->GetGeometry()->GetNode("alice");
 517
 518   Float_t  height1, height2, height3, height4, height5;
 519   Float_t  height;
 520   Float_t  theta;
 521   Float_t  half_thick_alu;
 522   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
 523   Float_t  half_thick_qua4,half_thick_qua5;
 524   Float_t  zdet;
 525   Float_t  r0, r5;
 526   Float_t  pi = TMath::Pi();
 527   Float_t  thick_alu;
 528
 529   height1           =     2.3;
 530   height2           =     3.7;
 531   height3           =     6.2;
 532   height4           =    10.5;
 533   height5           =    10.5;
 534
 535   theta             = pi/12.0/2.0;
 536   half_thick_alu    = 0.0025;
 537   thick_alu         = 2.0 * half_thick_alu;
 538   half_thick_qua1   = fThickness1/2.0;
 539   half_thick_qua2   = half_thick_qua1  - 0.25;
 540   half_thick_qua3   = half_thick_qua2  - 0.25;
 541   half_thick_qua4   = half_thick_qua3  - 0.25;
 542   half_thick_qua5   = half_thick_qua4  - 0.25;
 543
 544   zdet              =    86.9 +fThickness/2.0;
 545   r0                =    3.4;
 546   height            =    height1 + height2 + height3 + height4 + height5;
 547   r5                =    r0 + height;
 548
 549   Float_t   partube[3];
 550
 551   partube[0] =  r0 - 0.2;
 552   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
 553   partube[2] = fThickness/2.0;
 554
 555   TTUBE *V0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
 556
 557   Top->cd();
 558
 559   V0Rnode = new TNode("V0RI","V0RI",V0RI,0.0,0.0,+zdet,0);
 560
 561   V0Rnode->SetLineColor(kBlue);
 562   fNodes->Add(V0Rnode);
 563
 564   V0Rnode->SetVisibility(2);
 565
 566
 567 // Rondelles de carbone (epaisseur 1 mm) de maintien des cellules ...
 568
 569
 570   Float_t   parbox[10];
 571
 572   parbox[0] =    0.;
 573   parbox[1] =  360.;
 574   parbox[2] =    24;
 575   parbox[3] =     2;
 576   parbox[4] =  -0.1/2.0;
 577   parbox[5] =  r0;
 578   parbox[6] =  r5;
 579   parbox[7] =  +0.1/2.0;
 580   parbox[8] =  r0;
 581   parbox[9] =  r5;
 582
 583
 584   TPGON *V0CA = new TPGON("V0CA", "V0CA", "void",parbox[0], parbox[1],
 585                             parbox[2],parbox[3]);
 586
 587   V0CA->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
 588   V0CA->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
 589
 590   V0Rnode->cd();
 591   V0Rnode6 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0, fThickness/2.0-parbox[7],0);
 592   V0Rnode6->SetLineColor(kYellow);
 593   fNodes->Add(V0Rnode6);
 594   V0Rnode->cd();
 595   V0Rnode7 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0,-fThickness/2.0+parbox[7],0);
 596   V0Rnode7->SetLineColor(kYellow);
 597   fNodes->Add(V0Rnode7);
 598
 599   parbox[4] =  -fThickness/2.0;
 600   parbox[5] =  r0 - 0.2;
 601   parbox[6] =  r0;
 602   parbox[7] =  +fThickness/2.0;
 603   parbox[8] =  r0 - 0.2;
 604   parbox[9] =  r0;
 605
 606   TPGON  *V0IR = new TPGON("V0IR","V0IR","void",  parbox[0], parbox[1],
 607                             parbox[2],parbox[3]);
 608   V0IR->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
 609   V0IR->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
 610
 611   V0Rnode->cd();
 612   V0Rnode8 = new TNode("V0IR", "V0IR",V0IR,0.0,0.0,0.0,0);
 613   V0Rnode8->SetLineColor(kYellow);
 614   fNodes->Add(V0Rnode8);
 615
 616   parbox[4] =  -fThickness/2.0;
 617   parbox[5] =  r5;
 618   parbox[6] =  r5 + 1.0;
 619   parbox[7] =  +fThickness/2.0;
 620   parbox[8] =  r5;
 621   parbox[9] =  r5 + 1.0;
 622
 623   TPGON  *V0ER = new TPGON("V0ER","V0ER","void",  parbox[0], parbox[1],
 624                             parbox[2],parbox[3]);
 625   V0ER->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
 626   V0ER->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
 627
 628   V0Rnode->cd();
 629   V0Rnode9 = new TNode("V0ER", "V0ER",V0ER,0.0,0.0,0.0,0);
 630   V0Rnode9->SetLineColor(kYellow);
 631   fNodes->Add(V0Rnode9);
 632
 633   Float_t   dist0;
 634   Float_t   par[11];
 635
 636   dist0     =  r0 + height / 2.0;
 637   thick_alu =  2.0*half_thick_alu;
 638
 639   par[0]    =  half_thick_qua1;
 640   par[1]    =  0.0;
 641   par[2]    =  0.0;
 642   par[3]    =  height / 2.0 ;
 643   par[4]    =  TMath::Tan(theta) * r0;
 644   par[5]    =  TMath::Tan(theta) * r5;
 645   par[6]    =  0.0;
 646   par[7]    =  height / 2.0 ;
 647   par[8]    =  TMath::Tan(theta) * r0;
 648   par[9]    =  TMath::Tan(theta) * r5;
 649   par[10]   =  0.0;
 650
 651   TTRAP *V0R0 = new TTRAP("V0R0", "V0R0", "void", par[0], par[1], par[2], par[3],
 652                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 653
 654   Float_t   dist1;
 655   Float_t   r1;
 656   Float_t   offset;
 657
 658   dist1     =  (- height + height1) /2.0;
 659   r1        =  r0 + height1;
 660   offset    = - fThickness/2.0 + 0.1;
 661
 662   par[0]    =  half_thick_qua1 - thick_alu;
 663   par[3]    =  height1 / 2.0 - thick_alu;
 664   par[4]    =  TMath::Tan(theta) * r0 - thick_alu;
 665   par[5]    =  TMath::Tan(theta) * r1- thick_alu;
 666   par[7]    =  height1 / 2.0 - thick_alu;
 667   par[8]    =  TMath::Tan(theta) * r0 - thick_alu;
 668   par[9]    =  TMath::Tan(theta) * r1 - thick_alu;
 669
 670   TTRAP *V0R1 = new TTRAP("V0R1", "V0R1", "void", par[0], par[1], par[2], par[3],
 671                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 672
 673
 674   Float_t   dist2;
 675   Float_t   r2;
 676
 677   dist2     =    (- height + height2) /2.0 + height1;
 678   r2        =       r1 + height2;
 679
 680   par[0]    =  half_thick_qua2 - thick_alu;
 681   par[3]    =  height2 / 2.0 - thick_alu;
 682   par[4]    =  TMath::Tan(theta) * r1 - thick_alu;
 683   par[5]    =  TMath::Tan(theta) * r2 - thick_alu;
 684   par[7]    =  height2 / 2.0 - thick_alu;
 685   par[8]    =  TMath::Tan(theta) * r1 - thick_alu;
 686   par[9]    =  TMath::Tan(theta) * r2 - thick_alu;
 687
 688
 689   TTRAP *V0R2 = new TTRAP("V0R2", "V0R2", "void", par[0], par[1], par[2], par[3],
 690                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 691
 692
 693   Float_t   dist3;
 694   Float_t   r3;
 695
 696   dist3     =    (- height + height3) /2.0 + height1 + height2;
 697   r3        =       r2 + height3;
 698
 699   par[0]    =  half_thick_qua3 - thick_alu;
 700   par[3]    =  height3 / 2.0 - thick_alu;
 701   par[4]    =  TMath::Tan(theta) * r2 - thick_alu;
 702   par[5]    =  TMath::Tan(theta) * r3 - thick_alu;
 703   par[7]    =  height3 / 2.0 - thick_alu;
 704   par[8]    =  TMath::Tan(theta) * r2 - thick_alu;
 705   par[9]    =  TMath::Tan(theta) * r3 - thick_alu;
 706
 707
 708   TTRAP *V0R3 = new TTRAP("V0R3", "V0R3", "void", par[0], par[1], par[2], par[3],
 709                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 710
 711
 712   Float_t   dist4;
 713   Float_t   r4;
 714
 715   dist4     =    (- height + height4) /2.0 + height1 + height2 + height3;
 716   r4        =       r3 + height4;
 717
 718   par[0]    =  half_thick_qua4 - thick_alu;
 719   par[3]    =  height4 / 2.0 - thick_alu;
 720   par[4]    =  TMath::Tan(theta) * r3 - thick_alu;
 721   par[5]    =  TMath::Tan(theta) * r4 - thick_alu;
 722   par[7]    =  height4 / 2.0 - thick_alu;
 723   par[8]    =  TMath::Tan(theta) * r3 - thick_alu;
 724   par[9]    =  TMath::Tan(theta) * r4 - thick_alu;
 725
 726
 727   TTRAP *V0R4 = new TTRAP("V0R4", "V0R4", "void", par[0], par[1], par[2], par[3],
 728                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 729
 730
 731   Float_t   dist5;
 732
 733   dist5     =    (- height + height5) /2.0 + height1 + height2 + height3 + height4;
 734
 735   par[0]    =  half_thick_qua5 - thick_alu;
 736   par[3]    =  height5 / 2.0 - thick_alu;
 737   par[4]    =  TMath::Tan(theta) * r4 - thick_alu;
 738   par[5]    =  TMath::Tan(theta) * r5 - thick_alu;
 739   par[7]    =  height5 / 2.0 - thick_alu;
 740   par[8]    =  TMath::Tan(theta) * r4 - thick_alu;
 741   par[9]    =  TMath::Tan(theta) * r5 - thick_alu;
 742
 743
 744   TTRAP *V0R5 = new TTRAP("V0R5", "V0R5", "void", par[0], par[1], par[2], par[3],
 745                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
 746
 747
 748   Float_t  phi;
 749   Float_t  phi_deg= 180./12.;
 750   Float_t  phi_rad;
 751   Float_t  xdet,ydet;
 752   Int_t    n_detec = 1;
 753   char     NameNode[12];
 754
 755
 756   for (phi = 7.5; phi < 360.0; phi = phi + phi_deg)
 757   {
 758
 759     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
 760
 761     phi_rad = phi*pi/180.;
 762     xdet = dist0*TMath::Sin(phi_rad);
 763     ydet = dist0*TMath::Cos(phi_rad);
 764
 765
 766     sprintf(NameNode,"SUBDET%d",n_detec);
 767
 768     V0Rnode->cd();
 769     V0Rnode0 = new TNode(NameNode,NameNode,V0R0,-xdet,ydet, offset + half_thick_qua1,mat920);
 770     V0Rnode0->SetLineColor(kColorVZERO);
 771     fNodes->Add(V0Rnode0);
 772     n_detec++;
 773
 774     sprintf(NameNode,"SUBDET%d",n_detec);
 775     V0Rnode0->cd();
 776     V0Rnode1 = new TNode(NameNode,NameNode,V0R1,0.0,dist1, 0.0,0);
 777     V0Rnode1->SetLineColor(kColorVZERO);
 778     fNodes->Add(V0Rnode1);
 779     n_detec++;
 780
 781     sprintf(NameNode,"SUBDET%d",n_detec);
 782     V0Rnode0->cd();
 783     V0Rnode2 = new TNode(NameNode,NameNode,V0R2,0.0,dist2, - half_thick_qua1 + half_thick_qua2,0);
 784     V0Rnode2->SetLineColor(kColorVZERO);
 785     fNodes->Add(V0Rnode2);
 786     n_detec++;
 787
 788
 789     sprintf(NameNode,"SUBDET%d",n_detec);
 790     V0Rnode0->cd();
 791     V0Rnode3 = new TNode(NameNode,NameNode,V0R3,0.0,dist3, - half_thick_qua1 + half_thick_qua3,0);
 792     V0Rnode3->SetLineColor(kColorVZERO);
 793     fNodes->Add(V0Rnode3);
 794     n_detec++;
 795
 796     sprintf(NameNode,"SUBDET%d",n_detec);
 797     V0Rnode0->cd();
 798     V0Rnode4 = new TNode(NameNode,NameNode,V0R4,0.0,dist4, - half_thick_qua1 + half_thick_qua4,0);
 799     V0Rnode4->SetLineColor(kColorVZERO);
 800     fNodes->Add(V0Rnode4);
 801     n_detec++;
 802
 803     sprintf(NameNode,"SUBDET%d",n_detec);
 804     V0Rnode0->cd();
 805     V0Rnode5 = new TNode(NameNode,NameNode,V0R5,0.0,dist5, - half_thick_qua1 + half_thick_qua5,0);
 806     V0Rnode5->SetLineColor(kColorVZERO);
 807     fNodes->Add(V0Rnode5);
 808     n_detec++;
 809
 810     V0Rnode0->SetVisibility(2);
 811
 812   }
 813
 814
 815 //  Here I add the enveloppe of the  FRONTAL ABSORBER defined by Andreas Morsch
 816 //  in   AliABSOv0::CreateGeometry()  :
 817
 818     Float_t parm[24];
 819     Float_t dz;
 820
 821     Top->cd();
 822
 823     parm[0]  = 0.;
 824     parm[1]  = 360.;
 825     parm[2]  = 7.;
 826
 827     parm[3]  = -(zRear-zAbsStart)/2.;
 828     parm[4]  = rAbs;
 829     parm[5]  = zAbsStart * TMath::Tan(theta1);
 830
 831     parm[6]  = parm[3]+(zNose-zAbsStart);
 832     parm[7]  = rAbs;
 833     parm[8]  = zNose * TMath::Tan(theta1);
 834
 835     parm[9]  = parm[3]+(zConeTPC-zAbsStart);
 836     parm[10] = rAbs;
 837     parm[11] = parm[8] + (parm[9] - parm[6]) * TMath::Tan(theta2);
 838
 839     parm[12] = parm[3]+(zOpen-zAbsStart);
 840     parm[13] = rAbs;
 841     parm[14] = parm[11] + (parm[12] - parm[9]) * TMath::Tan(accMax);
 842
 843     parm[15] = parm[3]+(zRear-dRear-zAbsStart);
 844     parm[16] = rAbs   + (parm[15] - parm[12]) * TMath::Tan(thetaOpen1) ;
 845     parm[17] = parm[14] + (parm[15] - parm[12]) * TMath::Tan(accMax);
 846
 847     parm[18] = parm[3]+(zRear-dRear-zAbsStart);
 848     parm[19] = (zRear-dRear) * TMath::Tan(accMin);
 849     parm[20] = parm[14] + (parm[18] - parm[12]) * TMath::Tan(accMax);
 850
 851     parm[21] = -parm[3];
 852     parm[22] = zRear* TMath::Tan(accMin);
 853     parm[23] = parm[20] + (parm[21] - parm[18]) * TMath::Tan(accMax);
 854
 855     printf(" zRear, zAbsStart,  rAbs =  %f , %f , %f \n\n",
 856              zRear, zAbsStart,  rAbs );
 857
 858
 859     TPCON *abs0 = new TPCON("abs0", "abs0", "void", parm[0], parm[1], parm[2]);
 860
 861
 862     abs0->DefineSection(0, parm[3],  parm[4],  parm[5] );
 863     abs0->DefineSection(1, parm[6],  parm[7],  parm[8] );
 864     abs0->DefineSection(2, parm[9], parm[10], parm[11] );
 865     abs0->DefineSection(3,parm[12], parm[13], parm[14] );
 866     abs0->DefineSection(4,parm[15], parm[16], parm[17] );
 867     abs0->DefineSection(5,parm[18], parm[19], parm[20] );
 868     abs0->DefineSection(6,parm[21], parm[22], parm[23] );
 869
 870     dz = (zRear-zAbsStart)/2.+zAbsStart;
 871
 872     TRotMatrix* mat921 = new TRotMatrix("rot921","rot921",90.0,0.0,90.,90.0,180.0,0.0);
 873
 874     Node0 = new TNode("abs0","abs0",abs0,0.0,0.0,dz,0);
 875     Node0->SetLineColor(38);
 876     fNodes->Add(Node0);
 877
 878
 879     Float_t cpar[5];
 880
 881     cpar[0] = (zNose - zAbsStart) / 2.;
 882     cpar[1] = zAbsStart * TMath::Tan(accMax);
 883     cpar[2] = zAbsStart * TMath::Tan(theta1)-dSteel;
 884     cpar[3] = zNose * TMath::Tan(accMax);
 885     cpar[4] = zNose * TMath::Tan(theta1)-dSteel;
 886
 887     dz = -(zRear-zAbsStart)/2.+cpar[0];
 888
 889     TCONE *abs1 =  new TCONE("abs1", "abs1", "void", cpar[0], cpar[1], cpar[2],
 890                               cpar[3], cpar[4]);
 891
 892     Node0->cd();
 893
 894     Node1 = new TNode("abs1","abs1",abs1,0.0,0.0,dz,0);
 895     Node1->SetLineColor(7);
 896     fNodes->Add(Node1);
 897
 898 //  Here I add a reference box to visualise the vertex zone :
 899
 900     Top->cd();
 901
 902     Float_t  paref[3];
 903
 904     paref[0]  =  10.0;
 905     paref[1]  =  15.0;
 906     paref[2]  =   5.6;
 907
 908     TBRIK *aref = new TBRIK("aref","aref", "void", paref[0],paref[1],paref[2]);
 909
 910     Node2 = new TNode("aref","aref",aref,0.0,0.0,0.0,0);
 911     Node2->SetLineColor(kBlue);
 912     fNodes->Add(Node2);
 913
 914 //  Here I add the  mother volume  QBPM
 915 //  and the flanges  QB29, QB22 et QB24 defined by Andreas Morsch
 916 //  in   AliPIPEv0::CreateGeometry()  :
 917
 918
 919     Float_t parp[36];
 920
 921 //  Mother Volume QBPM :
 922
 923     parp[0]  =    0;
 924     parp[1]  =  360;
 925     parp[2]  =   11;
 926
 927     parp[3]  = - 90;
 928     parp[4]  =    0;
 929     parp[5]  =    5.8;
 930
 931     parp[6]  = - 81.0;
 932     parp[7]  =    0.;
 933     parp[8]  =    5.8;
 934
 935     parp[9]  = - 81.;
 936     parp[10]  =    0.;
 937     parp[11] =    4.22;
 938
 939     parp[12] = - 28.00;
 940     parp[13] =    0;
 941     parp[14] =    4.22;
 942
 943     parp[15] = - 28.00;
 944     parp[16] =    0;
 945     parp[17] =    3.2;
 946
 947     parp[18] =    0;
 948     parp[19] =    0;
 949     parp[20] =    3.2;
 950
 951     parp[21] =   28.00;
 952     parp[22] =    0;
 953     parp[23] =    3.2;
 954
 955     parp[24] =   28.00;
 956     parp[25] =    0;
 957     parp[26] =    4.22;
 958
 959     parp[27] =  250;
 960     parp[28] =    0;
 961     parp[29] =   4.22;
 962
 963     parp[30] =  250;
 964     parp[31] =    0;
 965     parp[32] =    5;
 966
 967     parp[33] =  800;
 968     parp[34] =    0;
 969     parp[35] =    5;
 970
 971     TPCON *pip0 = new TPCON("pip0", "pip0", "void", parp[0], parp[1], parp[2]);
 972
 973     pip0->DefineSection( 0, parp[3],  parp[4],  parp[5] );
 974     pip0->DefineSection( 1, parp[6],  parp[7],  parp[8] );
 975     pip0->DefineSection( 2, parp[9], parp[10], parp[11] );
 976     pip0->DefineSection( 3,parp[12], parp[13], parp[14] );
 977     pip0->DefineSection( 4,parp[15], parp[16], parp[17] );
 978     pip0->DefineSection( 5,parp[18], parp[19], parp[20] );
 979     pip0->DefineSection( 6,parp[21], parp[22], parp[23] );
 980     pip0->DefineSection( 7,parp[24], parp[25], parp[26] );
 981     pip0->DefineSection( 8,parp[27], parp[28], parp[29] );
 982     pip0->DefineSection( 9,parp[30], parp[31], parp[32] );
 983     pip0->DefineSection(10,parp[33], parp[34], parp[35] );
 984
 985     dz = 0.0;
 986
 987     Top->cd();
 988
 989     Node3 = new TNode("pip0","pip0",pip0,0.0,0.0,dz,mat921);
 990     Node3->SetLineColor(10);
 991     fNodes->Add(Node3);
 992     Node3->SetVisibility(2);
 993
 994 //  Flanges QB29 at  654.8  and   254.8  cms :
 995
 996     Float_t  ptube[3];
 997
 998     ptube[0] = 3.0;
 999     ptube[1] = 4.9;
1000     ptube[2] = 2.2;
1001
1002     TTUBE *pip1 = new TTUBE("pip1", "pip1", "void", ptube[0], ptube[1], ptube[2]);
1003
1004     Node3->cd();
1005
1006
1007     Node4 = new TNode("pip1","pip1",pip1,0.0,0.0,254.8,0);
1008     Node4->SetLineColor(6);
1009     fNodes->Add(Node4);
1010
1011     TTUBE *pip2 = new TTUBE("pip2", "pip2", "void", ptube[0], ptube[1], ptube[2]);
1012
1013     Node3->cd();
1014
1015     Node5 = new TNode("pip2","pip2",pip2,0.0,0.0,654.8,0);
1016     Node5->SetLineColor(6);
1017     fNodes->Add(Node5);
1018
1019
1020 //  Al-Be  section QBAB at 335.0 cm  (LEFT side) :
1021
1022     ptube[0] =  2.90;
1023     ptube[1] =  3.05;
1024     ptube[2] = 171.0;
1025
1026     TTUBE *pip3 = new TTUBE("pip3", "pip3", "void", ptube[0], ptube[1], ptube[2]);
1027
1028     Node3->cd();
1029
1030     Node6 = new TNode("pip3","pip3",pip3,0.0,0.0,335.0+ptube[2],0);
1031     Node6->SetLineColor(6);
1032     fNodes->Add(Node6);
1033
1034 // Here I add the flange which is sitting on beam line
1035 // right in front of V0R detector, and which I found on CERN drawing
1036 // entitled : ALICE BEAM VACCUM CHAMBER - RB26 version III :
1037
1038     ptube[0] = 3.0;
1039     ptube[1] = 5.675;
1040     ptube[2] = 0.9;
1041
1042     TTUBE *pip4 = new TTUBE("pip4", "pip4", "void", ptube[0], ptube[1], ptube[2]);
1043
1044     Node3->cd();
1045
1046
1047     Node7 = new TNode("pip4","pip4",pip4,0.0,0.0,-85.0-0.9,0);
1048     Node7->SetLineColor(6);
1049     fNodes->Add(Node7);
1050
1051  }
1052
1053
1054 //------------------------------------------------------------------------
1055 void AliVZEROv0::CreateMaterials()
1056 {
1057   Int_t i;
1058
1059   printf("\n");
1060   for(i=0;i<35;i++) printf("*");
1061   printf(" VZERO create materials ");
1062   for(i=0;i<35;i++) printf("*");
1063   printf("\n");
1064
1065 /* ...................  OLD VALUES  ( used in RICH) ............................
1066     Float_t ppckov[14] = { 5.63e-9,5.77e-9,5.9e-9,6.05e-9,6.2e-9,6.36e-9,6.52e-9,
1067                            6.7e-9,6.88e-9,7.08e-9,7.3e-9,7.51e-9,7.74e-9,8e-9 };
1068     Float_t rindex_quarz[14] = { 1.528309,1.533333,
1069                                  1.538243,1.544223,1.550568,1.55777,
1070                                  1.565463,1.574765,1.584831,1.597027,
1071                                  1.611858,1.6277,1.6472,1.6724 };
1072     Float_t absco_quarz[14] = { 20.126,16.27,13.49,11.728,9.224,8.38,7.44,7.17,
1073                                 6.324,4.483,1.6,.323,.073,0. };
1074 ...................................................................................... */
1075
1076
1077     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,
1078                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
1079
1080     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458,
1081                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362,
1082                                  1.662295, 1.68337 };
1083
1084     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525,
1085                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };
1086
1087     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1088
1089
1090     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1091
1092     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,
1093                                1e-4,1e-4,1e-4,1e-4 };
1094     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1095
1096
1097     Int_t *idtmed = fIdtmed->GetArray()-2999;
1098
1099     TGeant3 *geant3 = (TGeant3*) gMC;
1100
1101 //  Parameters related to Quarz (SiO2) :
1102
1103     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
1104     Int_t nlmatqua;
1105
1106     aqua[0]    = 28.09;
1107     aqua[1]    = 16.;
1108     zqua[0]    = 14.;
1109     zqua[1]    = 8.;
1110     densqua    = 2.64;
1111     nlmatqua   = -2;
1112     wmatqua[0] = 1.;
1113     wmatqua[1] = 2.;
1114
1115 // Parameters  related to aluminum sheets :
1116
1117     Float_t  aal   = 26.98;
1118     Float_t  zal   = 13.00;
1119     Float_t  densal=   2.7;
1120     Float_t  radlal=   8.9;
1121
1122 // Parameters  related to scintillator CH :
1123
1124     Float_t ascin[2] = {1.01,12.01};
1125     Float_t zscin[2] = {1,6};
1126     Float_t wscin[2] = {1,1};
1127     Float_t denscin  = 1.03;
1128
1129 //  Definition of materials :
1130
1131     AliMaterial( 1, "AIR A$", 14.61, 7.3, .001205, 30420., 67500);
1132     AliMaterial(11, "AIR I$", 14.61, 7.3, .001205, 30420., 67500);
1133     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9);
1134     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
1135     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2);
1136     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0);
1137
1138
1139     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
1140
1141
1142     Int_t   ISXFLD = gAlice->Field()->Integ();
1143     Float_t SXMGMX = gAlice->Field()->Max();
1144
1145     Float_t tmaxfd, stemax, deemax, epsil, stmin;
1146
1147     tmaxfd = -10.;
1148     stemax = -0.1;
1149     deemax = -0.1;
1150     epsil  = -0.01;
1151     stmin  = -0.001;
1152
1153
1154 //  Active Air :
1155     AliMedium(1, "ACTIVE AIR$", 1, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
1156
1157 //  Inactive air :
1158
1159     AliMedium(11, "INACTIVE AIR$", 11, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
1160
1161     AliMedium(2, "CARBON$ ", 2,  1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
1162
1163     AliMedium(3, "QUARZ$", 3, 1, ISXFLD, SXMGMX, tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin);
1164
1165     AliMedium(4,"ALUMINUM1$",4, 1, ISXFLD, SXMGMX, tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1166     AliMedium(5,"ALUMINUM2$",5, 1, ISXFLD, SXMGMX, tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
1167     AliMedium(6,"SCINTILLATOR$",6, 1, ISXFLD, SXMGMX, 10., .01, 1., .003, .003);
1168
1169     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
1170     gMC->Gstpar(idtmed[3000], "HADR", 1.);
1171     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
1172     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
1173
1174     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
1175     gMC->Gstpar(idtmed[3001], "HADR", 1.);
1176     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
1177     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
1178
1179     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
1180     gMC->Gstpar(idtmed[3002], "HADR", 1.);
1181     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
1182     gMC->Gstpar(idtmed[3002], "DRAY", 1.);
1183
1184     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
1185     gMC->Gstpar(idtmed[3003], "HADR", 1.);
1186     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
1187     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
1188
1189     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
1190     gMC->Gstpar(idtmed[3004], "HADR", 1.);
1191     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
1192     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
1193
1194     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
1195     gMC->Gstpar(idtmed[3005], "HADR", 1.);
1196     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
1197     gMC->Gstpar(idtmed[3005], "DRAY", 1.);
1198
1199     geant3->Gsckov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);
1200
1201     geant3->Gsckov(idtmed[3004], 14, ppckov, absco_alu, effic_alu, rindex_alu);
1202
1203 }
1204 //---------------------------------------------------------------------
1205 void AliVZEROv0::DrawModule()
1206 {
1207
1208 //  Drawing is done in DrawVZERO.C
1209
1210    Int_t i;
1211
1212    printf("\n");
1213    for(i=0;i<35;i++) printf("*");
1214    printf(" VZERO DrawModule ");
1215    for(i=0;i<35;i++) printf("*");
1216    printf("\n");
1217
1218
1219 }
1220
1221 //-------------------------------------------------------------------
1222 void AliVZEROv0::Init()
1223 {
1224 // Initialises version 0 of the VZERO Detector
1225 // Just prints an information message
1226
1227    Int_t i;
1228
1229    printf("\n");
1230    for(i=0;i<35;i++) printf("*");
1231    printf(" VZERO_Init \n");
1232    for(i=0;i<35;i++) printf("*");
1233    printf("\n");
1234
1235    fMulti       = 0;
1236    fNCerenkovs  = 0;
1237    fNGCerenkovs = 0;
1238    fNdead       = 0;
1239
1240    BookingHistograms();
1241
1242 }
1243
1244 //-------------------------------------------------------------------
1245
1246 void AliVZEROv0::StepManager()
1247 {
1248
1249 //   Minimal version of StepManager :
1250 //   Everything has been removed, I only AddHit whenever hit is in
1251 //   volume V0RI.
1252
1253      Int_t          copy;
1254      Int_t          vol[4];  // (box, layer, row, column) indices
1255      Float_t        hits[19];  // position wrt MRS,   energies...
1256
1257      TLorentzVector pos;
1258      Float_t        global[3];
1259      Float_t        local[3];
1260
1261      TLorentzVector momentum;
1262      Float_t        theta;
1263      Float_t        phi;
1264      Float_t        mom[4];
1265      Float_t        kRaddeg = 180/TMath::Pi();
1266
1267      Float_t        TrackEnters = 0.0;
1268      Float_t        TrackExits  = 0.0;
1269      Float_t        Cerenkov    = 0.0;
1270
1271      gMC->SetMaxStep(fMaxStepAlu);
1272      gMC->SetMaxStep(fMaxStepQua);
1273
1274      if (!gMC->IsTrackAlive()) return;
1275
1276      if (gMC->IsTrackEntering())       TrackEnters = 1.0;
1277      if (gMC->IsTrackExiting() )       TrackExits  = 1.0;
1278      if (gMC->TrackPid() == 50000050)  Cerenkov    = 1.0;
1279
1280
1281
1282      gMC->TrackPosition(pos);
1283      gMC->TrackMomentum(momentum);
1284
1285      mom[0] = momentum[0];
1286      mom[1] = momentum[1];
1287      mom[2] = momentum[2];
1288      mom[3] = momentum[3];
1289
1290      Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
1291      Double_t rt = TMath::Sqrt(tc);
1292      theta   = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
1293      phi     = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1294
1295      global[0] = pos[0];
1296      global[1] = pos[1];
1297      global[2] = pos[2];
1298
1299
1300      gMC->Gmtod(global,local,1);
1301
1302      hits[0]   = global[0];
1303      hits[1]   = global[1];
1304      hits[2]   = global[2];
1305      hits[3]   = local[0];
1306      hits[4]   = local[1];
1307      hits[5]   = local[2];
1308      hits[6]   = gMC->Edep();
1309      hits[7]   = gMC->Etot();
1310      hits[8]   = Float_t (gMC->TrackPid());
1311      hits[9]   = Float_t (gMC->IdFromPDG(gMC->TrackPid()));
1312      hits[10]  = gMC->TrackTime();
1313      hits[11]  = TrackEnters;
1314      hits[12]  = TrackExits;
1315      hits[13]  = gMC->TrackCharge();
1316      hits[14]  = Cerenkov;
1317
1318      hits[16]  = theta;
1319      hits[17]  = phi;
1320
1321      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
1322      vol[2]    = gMC->CurrentVolID(copy);
1323      vol[3]    = copy;
1324
1325
1326      if (gMC->CurrentVolID(copy) >= gMC->VolId("V0RI") &&
1327          gMC->CurrentVolID(copy) <= gMC->VolId("V0E4"))
1328      {
1329          AddHit(gAlice->CurrentTrack(), vol, hits);
1330         }
1331
1332   }
1333
1334 //---------------------------------------------------------------------
1335 void AliVZEROv0::AddHit(Int_t track, Int_t* vol, Float_t* hits)
1336 {
1337
1338   // Adds a  hit
1339
1340
1341    TClonesArray  &lhits = *fHits;
1342
1343    new(lhits[fNhits++]) AliVZEROhit(fIshunt, track, vol, hits);
1344
1345 }
1346
1347 //---------------------------------------------------------------------
1348 void AliVZEROv0::FinishEvent()
1349 {
1350
1351    printf("\n");
1352    for(int i=0;i<30;i++) printf("*");
1353    printf(" VZERO_finishevent");
1354    for(int i=0;i<30;i++) printf("*");
1355    printf("\n");
1356
1357      AddDigit(tracks, digits);
1358
1359
1360      if(fMulti > 0) fhMultiplicity->Fill(fMulti);
1361      fhCerenkov->Fill(fNCerenkovs);
1362
1363      fMulti       = 0;
1364      fNCerenkovs  = 0;
1365      fNGCerenkovs = 0;
1366      fNdead       = 0;
1367
1368 }
1369
1370 //---------------------------------------------------------------------
1371 void AliVZEROv0::AddDigit(Int_t *tracks, Int_t* digits)
1372 {
1373
1374    TClonesArray  &ldigits = *fDigits;
1375
1376    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1377
1378 }
1379
1380
1381 //---------------------------------------------------------------------
1382 void AliVZEROv0::MakeBranch(Option_t *option)
1383 {
1384
1385   // Creates new branches in the current Root Tree
1386
1387
1388   char branchname[10];
1389   sprintf(branchname,"%s",GetName());
1390
1391
1392   char *H = strstr(option,"H");
1393
1394   if (fHits   && gAlice->TreeH() && H) {
1395     gAlice->TreeH()->Branch(branchname,&fHits, fBufferSize);
1396     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1397   }
1398
1399   char *D = strstr(option,"D");
1400   //
1401   if (fDigits   && gAlice->TreeD() && D) {
1402     gAlice->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1403     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1404   }
1405
1406
1407 }
1408
1409 //---------------------------------------------------------------------
1410 void AliVZEROv0::BookingHistograms()
1411 {
1412
1413   if (fhMultiplicity)
1414     delete fhMultiplicity;
1415
1416   if (fhGEANTcode)
1417     delete fhGEANTcode;
1418
1419   if (fhCerenkov)
1420     delete fhCerenkov;
1421
1422   if (fhToF)
1423     delete fhToF;
1424
1425 //  fhMultiplicity = new TH1F("hMultiplicity", "hMultiplicity", 350,  0. , 350.);
1426
1427   fhMultiplicity = new TH1F("hMultiplicity", "hMultiplicity", 100,  1. , 100.);
1428   fhGEANTcode    = new TH1F("hGEANTcode", "hGEANTcode", 50,  1., 50.);
1429   fhCerenkov     = new TH1F("hCerenkov", "hCerenkov", 100, 1., 100000.);
1430   fhToF          = new TH1F("hToF", "hToF",150,2.0,7.0);
1431
1432 }
1433
1434 //---------------------------------------------------------------------
1435 void AliVZEROv0::FinishRun()
1436 {
1437
1438    SavingHistograms();
1439 }
1440
1441
1442
1443 //---------------------------------------------------------------------
1444 void AliVZEROv0::SavingHistograms()
1445 {
1446
1447 //  Saves the histograms in a root file named "name.save"
1448
1449
1450   Text_t outputname[8] ;
1451   outputname = "Fileout";
1452   TFile output(outputname,"RECREATE");
1453   output.cd();
1454
1455   if (fhMultiplicity)
1456     fhMultiplicity->Write();
1457   if (fhGEANTcode)
1458     fhGEANTcode->Write();
1459   if (fhCerenkov)
1460     fhCerenkov->Write();
1461   if (fhToF)
1462     fhToF->Write();
1463 }