TPC/AliTPCv0.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 $Log$
  18 Revision 1.13.8.2  2000/04/10 08:33:44  kowal2
  19
  20 Updated readout chambers
  21
  22 Revision 1.13.8.1  2000/04/10 07:56:53  kowal2
  23 Not used anymore - removed
  24
  25 Revision 1.13  1999/11/04 17:28:06  fca
  26 Correct barrel part of HV Degrader
  27
  28 Revision 1.12  1999/10/08 06:27:23  fca
  29 Corrected bug in the HV degrader geometry, thanks to G.Tabary
  30
  31 Revision 1.11  1999/10/04 13:39:54  fca
  32 Correct array index problem
  33
  34 Revision 1.10  1999/09/29 09:24:34  fca
  35 Introduction of the Copyright and cvs Log
  36
  37 */
  38
  39 ///////////////////////////////////////////////////////////////////////////////
  40 //                                                                           //
  41 //  Time Projection Chamber version 0 -- "coarse" TPC                        //
  42 //                                                                           //
  43 //Begin_Html
  44 /*
  45 <img src="picts/AliTPCv0Class.gif">
  46 */
  47 //End_Html
  48 //                                                                           //
  49 //                                                                           //
  50 ///////////////////////////////////////////////////////////////////////////////
  51
  52 #include <TMath.h>
  53 #include <TGeometry.h>
  54 #include <TNode.h>
  55 #include <TTUBE.h>
  56 #include "AliTPCv0.h"
  57 #include "AliRun.h"
  58 #include <iostream.h>
  59 #include <fstream.h>
  60 #include "AliMC.h"
  61 #include "AliConst.h"
  62
  63 #include "AliTPCParam.h"
  64 #include "AliTPCDigitsArray.h"
  65
  66 ClassImp(AliTPCv0)
  67
  68 //_____________________________________________________________________________
  69 AliTPCv0::AliTPCv0(const char *name, const char *title)
  70          :AliTPC(name, title)
  71 {
  72   //
  73   // Standard creator for TPC version 0
  74   //
  75 }
  76
  77 //_____________________________________________________________________________
  78 void AliTPCv0::CreateGeometry()
  79 {
  80   //
  81   // Creation of the TPC coarse geometry (version 0)
  82   // Origin Marek Kowalski Cracow
  83   //
  84   //Begin_Html
  85   /*
  86     <img src="picts/AliTPCv0.gif">
  87   */
  88   //End_Html
  89   //Begin_Html
  90   /*
  91     <img src="picts/AliTPCv0Tree.gif">
  92   */
  93   //End_Html
  94
  95
  96   Int_t *idtmed = fIdtmed->GetArray();
  97
  98   Float_t dm[21];
  99   Int_t idrotm[120];
 100
 101   Int_t nRotMat = 0;
 102
 103
 104   // ----------------------------------------------------
 105   //          FIELD CAGE WITH ENDCAPS - G10
 106   //          THIS IS ALSO A TPC MOTHER VOLUME
 107   // ----------------------------------------------------
 108
 109   dm[0] = 76.;
 110   dm[1] = 278.;
 111   dm[2] = 275.;
 112
 113   gMC->Gsvolu("TPC ", "TUBE", idtmed[8], dm, 3);
 114
 115   //-----------------------------------------------------
 116   //  Endcap cover c-fibre 0.86% X0
 117   //-----------------------------------------------------
 118
 119   dm[0] = 78.;
 120   dm[1] = 258.;
 121   dm[2] = 0.95;
 122
 123   gMC->Gsvolu("TPEC","TUBE",idtmed[10],dm,3);
 124
 125   //-----------------------------------------------------
 126   // Drift gas , leave 2 cm at the outer radius
 127   // and inner raddius
 128   //-----------------------------------------------------
 129
 130   dm[0] = 78.;
 131   dm[1] = 258.;
 132   dm[2] = 250.;
 133
 134   gMC->Gsvolu("TGAS", "TUBE", idtmed[3], dm, 3);
 135
 136
 137   //------------------------------------------------------
 138   //  membrane holder - carbon fiber
 139   //------------------------------------------------------
 140
 141
 142   gMC->Gsvolu("TPMH","TUBE",idtmed[6],dm,0);
 143
 144   dm[0] = 252.;
 145   dm[1] = 258.;
 146   dm[2] = 0.2;
 147
 148   gMC->Gsposp("TPMH",1,"TGAS",0.,0.,0.,0,"ONLY",dm,3);
 149
 150   dm[0] = 78.;
 151   dm[1] = 82.;
 152   dm[2] = 0.1;
 153
 154   gMC->Gsposp("TPMH",2,"TGAS",0.,0.,0.,0,"ONLY",dm,3);
 155
 156   //----------------------------------------------------------
 157   //  HV membrane - 25 microns of mylar
 158   //----------------------------------------------------------
 159
 160   dm[0] = 82.;
 161   dm[1] = 252.;
 162   dm[2] = 0.00125;
 163
 164   gMC->Gsvolu("TPHV","TUBE",idtmed[5],dm,3);
 165
 166   gMC->Gspos("TPHV",1,"TGAS",0.,0.,0.,0,"ONLY");
 167
 168   gMC->Gspos("TGAS",1,"TPC ",0.,0.,0.,0,"ONLY");
 169
 170   //----------------------------------------------------------
 171   // "side" gas volume, the same as the drift gas
 172   // the readout chambers are placed there.
 173   //----------------------------------------------------------
 174
 175   dm[0] = 78.;
 176   dm[1] = 258.;
 177   dm[2] = 0.5*(275. - 250.);
 178
 179   gMC->Gsvolu("TPSG", "TUBE", idtmed[2], dm, 3);
 180
 181   Float_t z_side = dm[2]; // 1/2 of the side gas thickness
 182
 183   //-----------------------------------------------------------
 184   //   Readout chambers , 25% of X0, I use Al as the material
 185   //-----------------------------------------------------------
 186
 187   Float_t InnerOpenAngle = fTPCParam->GetInnerAngle();
 188   Float_t OuterOpenAngle = fTPCParam->GetOuterAngle();
 189
 190   Float_t InnerAngleShift = fTPCParam->GetInnerAngleShift();
 191   Float_t OuterAngleShift = fTPCParam->GetOuterAngleShift();
 192
 193
 194   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
 195   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
 196
 197
 198   Float_t InSecLowEdge = fTPCParam->GetInnerRadiusLow();
 199   Float_t InSecUpEdge =  fTPCParam->GetInnerRadiusUp();
 200
 201   Float_t OuSecLowEdge = fTPCParam->GetOuterRadiusLow();
 202   Float_t OuSecUpEdge = fTPCParam->GetOuterRadiusUp();
 203
 204   Float_t SecThick = 2.225; // Al
 205
 206
 207   //  S (Inner) sectors
 208
 209   Float_t LowEdge = fTPCParam->GetInnerFrameSpace();
 210
 211   dm[0] = InSecLowEdge*TMath::Tan(0.5*InnerOpenAngle)-LowEdge;
 212   dm[1] = InSecUpEdge*TMath::Tan(0.5*InnerOpenAngle)-LowEdge;
 213   dm[2] = SecThick;
 214   dm[3] = 0.5*(InSecUpEdge-InSecLowEdge);
 215
 216   Float_t xCenterS = InSecLowEdge+dm[3];
 217
 218   gMC->Gsvolu("TRCS", "TRD1", idtmed[0], dm, 4);
 219
 220   //  L (Outer) sectors
 221
 222   Float_t UpEdge = fTPCParam->GetOuterFrameSpace();
 223
 224   dm[0] = OuSecLowEdge*TMath::Tan(0.5*OuterOpenAngle)-UpEdge;
 225   dm[1] = OuSecUpEdge*TMath::Tan(0.5*OuterOpenAngle)-UpEdge;
 226   dm[2] = SecThick;
 227   dm[3] = 0.5*(OuSecUpEdge-OuSecLowEdge);
 228
 229   Float_t xCenterL = OuSecLowEdge+dm[3];
 230
 231   gMC->Gsvolu("TRCL", "TRD1", idtmed[0], dm, 4);
 232
 233   Float_t z1 = -z_side + SecThick*0.5;
 234
 235   //------------------------------------------------------------------
 236   // Positioning of the S-sector readout chambers
 237   //------------------------------------------------------------------
 238
 239   Int_t ns;
 240   Float_t theta1,theta2,theta3;
 241   Float_t phi1,phi2,phi3;
 242   Float_t alpha;
 243   Float_t x,y;
 244
 245   for(ns=0;ns<nInnerSector;ns++){
 246
 247     phi1 = ns * InnerOpenAngle + 270.*kDegrad + InnerAngleShift;
 248     phi1 *= kRaddeg; // in degrees
 249
 250     phi1 = (Float_t)TMath::Nint(phi1);
 251
 252     if (phi1 > 360.) phi1 -= 360.;
 253
 254     theta1 = 90.;
 255     phi2   = 90.;
 256     theta2 = 180.;
 257     phi3   = ns * InnerOpenAngle + InnerAngleShift;
 258     phi3 *= kRaddeg; // in degrees
 259
 260     phi3 = (Float_t)TMath::Nint(phi3);
 261
 262     if(phi3 > 360.) phi3 -= 360.;
 263
 264     theta3 = 90.;
 265
 266     alpha = phi3*kDegrad;
 267
 268     x = xCenterS * TMath::Cos(alpha);
 269     y = xCenterS * TMath::Sin(alpha);
 270
 271     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 272
 273     gMC->Gspos("TRCS", ns+1, "TPSG", x, y, z1, idrotm[nRotMat], "ONLY");
 274
 275     nRotMat++;
 276
 277   }
 278
 279   //-------------------------------------------------------------------
 280   //  Positioning of the L-sectors readout chambers
 281   //-------------------------------------------------------------------
 282
 283   for(ns=0;ns<nOuterSector;ns++){
 284     phi1 = ns * OuterOpenAngle + 270.*kDegrad + OuterAngleShift;
 285     phi1 *= kRaddeg; // in degrees
 286
 287     phi1 = (Float_t)TMath::Nint(phi1);
 288
 289
 290     if (phi1 > 360.) phi1 -= 360.;
 291
 292     theta1 = 90.;
 293     phi2   = 90.;
 294     theta2 = 180.;
 295     phi3   = ns * OuterOpenAngle+OuterAngleShift;
 296     phi3 *= kRaddeg; // in degrees
 297
 298     phi3 = (Float_t)TMath::Nint(phi3);
 299
 300
 301     if(phi3 > 360.) phi3 -= 360.;
 302
 303     theta3 = 90.;
 304
 305     alpha = phi3*kDegrad;
 306
 307     x = xCenterL * TMath::Cos(alpha);
 308     y = xCenterL * TMath::Sin(alpha);
 309
 310     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 311
 312
 313     gMC->Gspos("TRCL", ns+1, "TPSG", x, y, z1, idrotm[nRotMat], "ONLY");
 314
 315     nRotMat++;
 316
 317   }
 318
 319   Float_t z0 = z_side - 0.95;
 320
 321   gMC->Gspos("TPEC",1,"TPSG",0.,0.,z0,0,"ONLY");
 322
 323   // ==========================================================
 324   //                  wheels
 325   // ==========================================================
 326
 327   //
 328   //  auxilary structures
 329   //
 330
 331
 332   gMC->Gsvolu("TPWI","TUBE",idtmed[24],dm,0); // "air"
 333
 334   // ----------------------------------------------------------
 335   //       Large wheel -> positioned in the TPC
 336   // ----------------------------------------------------------
 337
 338
 339   z0 = 263.5; // TPC length - 1/2 spoke wheel width
 340
 341   dm[0] = 258.;
 342   dm[1] = 278.;
 343   dm[2] = 11.5;
 344
 345   gMC->Gsvolu("TPWL", "TUBE", idtmed[0], dm, 3);
 346
 347   dm[0] = dm[0]+2.;
 348   dm[1] = 278.;
 349   dm[2] = dm[2]-2.;
 350
 351   gMC->Gsposp("TPWI",1,"TPWL",0.,0.,0.,0,"ONLY",dm,3);
 352
 353   gMC->Gspos("TPWL", 1, "TPC ", 0, 0, z0, 0, "ONLY");
 354   gMC->Gspos("TPWL", 2, "TPC ", 0, 0, -z0, 0, "ONLY");
 355
 356   //
 357   //  Outer vessel + CO2 HV degrader
 358   //
 359
 360   dm[0] = 260.;
 361   dm[1] = 278.;
 362   dm[2] = 252.;
 363
 364   gMC->Gsvolu("TPCO","TUBE",idtmed[12],dm,3);
 365
 366   dm[0] = 275.;
 367   dm[1] = 278.;
 368
 369   gMC->Gsvolu("TPOV","TUBE",idtmed[10],dm,3);
 370
 371   gMC->Gspos("TPOV",1,"TPCO",0.,0.,0.,0,"ONLY");
 372
 373
 374   // G10 plugs
 375
 376   dm[0] = 258.;
 377   dm[1] = 260.;
 378   dm[2] = 1.;
 379
 380   gMC->Gsvolu("TPG1","TUBE",idtmed[8],dm,3);
 381   gMC->Gspos("TPG1",1,"TPCO",0.,0.,251.,0,"ONLY");
 382   gMC->Gspos("TPG1",2,"TPCO",0.,0.,-251.,0,"ONLY");
 383
 384   gMC->Gspos("TPCO",1,"TPC ",0.,0.,0.,0,"ONLY");
 385
 386
 387   //----------------------------------------------------------
 388   //  Small wheel -> positioned in "side gas
 389   //----------------------------------------------------------
 390
 391   dm[0] = 78.;
 392   dm[1] = 82.;
 393   dm[2] = 11.5;
 394
 395   gMC->Gsvolu("TPWS", "TUBE", idtmed[0], dm, 3);
 396
 397   dm[0] = 78.;
 398   dm[1] = dm[1]-2;
 399   dm[2] = dm[2]-2.;
 400
 401   gMC->Gsvolu("TPW1", "TUBE", idtmed[2], dm, 3);
 402
 403   gMC->Gspos("TPW1", 1, "TPWS", 0., 0., 0., 0, "ONLY");
 404
 405   z0 = 1.; // spoke wheel is shifted w.r.t. center of the "side gas"
 406
 407   gMC->Gspos("TPWS", 1, "TPSG", 0, 0, z0, 0, "ONLY");
 408
 409
 410   // to avoid overlaps
 411
 412   dm[0] = 76.;
 413   dm[1] = 78.;
 414   dm[2] = 11.5;
 415
 416   gMC->Gsvolu("TPS1","TUBE",idtmed[0],dm,3);
 417
 418   dm[2] = 9.5;
 419
 420   gMC->Gsvolu("TPS2","TUBE",idtmed[24],dm,3);
 421
 422   gMC->Gspos("TPS2",1,"TPS1",0.,0.,0.,0,"ONLY");
 423
 424   z0= 263.5;
 425
 426   gMC->Gspos("TPS1",1,"TPC ",0.,0.,z0,0,"ONLY");
 427   gMC->Gspos("TPS1",2,"TPC ",0.,0.,-z0,0,"ONLY");
 428
 429   // G10 plug
 430
 431   dm[0] = 76.;
 432   dm[1] = 78.;
 433   dm[2] = 1.;
 434
 435   gMC->Gsvolu("TPG2","TUBE",idtmed[8],dm,3);
 436
 437   z0 = 251.;
 438
 439   gMC->Gspos("TPG2",1,"TPC ",0.,0.,z0,0,"ONLY");
 440   gMC->Gspos("TPG2",2,"TPC ",0.,0.,-z0,0,"ONLY");
 441
 442
 443   //---------------------------------------------------------
 444   //  central wheel  6 (radial direction) x 4 (along z) cm2
 445   //---------------------------------------------------------
 446
 447   dm[0] = 140.;
 448   dm[1] = 146.;
 449   dm[2] = 2.;
 450
 451   gMC->Gsvolu("TPWC","TUBE",idtmed[0],dm,3);
 452
 453   dm[0] = dm[0] + 2.;
 454   dm[1] = dm[1] - 2.;
 455   dm[2] = dm[2] - 1.;
 456
 457   gMC->Gsposp("TPWI",2,"TPWC",0.,0.,0.,0,"ONLY",dm,3);
 458
 459   z0 = z_side - 1.9 - 2.;
 460
 461   gMC->Gspos("TPWC",1,"TPSG",0.,0.,z0,0,"ONLY");
 462
 463   //
 464
 465   gMC->Gsvolu("TPSE","BOX ",idtmed[24],dm,0); // "empty" part of the spoke
 466
 467
 468   //---------------------------------------------------------
 469   //  inner spokes (nSectorInner)
 470   //---------------------------------------------------------
 471
 472   dm[0] = 0.5*(139.9-82.1);
 473   dm[1] = 3.;
 474   dm[2] = 2.;
 475
 476   Float_t x1 = dm[0]+82.;
 477
 478   gMC->Gsvolu("TPSI","BOX",idtmed[0],dm,3);
 479
 480   dm[1] = dm[1]-1.;
 481   dm[2] = dm[2]-1.;
 482
 483   gMC->Gsposp("TPSE",1,"TPSI",0.,0.,0.,0,"ONLY",dm,3);
 484
 485   for(ns=0;ns<nInnerSector;ns++){
 486
 487     phi1 = 0.5*InnerOpenAngle + ns*InnerOpenAngle + InnerAngleShift;
 488     theta1=90.;
 489     phi1 *=kRaddeg;
 490
 491     phi1 = (Float_t)TMath::Nint(phi1);
 492
 493     phi2 = phi1+90.;
 494     if(phi2>360.) phi2 -= 360.;
 495     theta2=90.;
 496     phi3=0.;
 497     theta3=0.;
 498
 499     alpha = phi1 * kDegrad;
 500     x     = x1 * TMath::Cos(alpha);
 501     y     = x1 * TMath::Sin(alpha);
 502
 503    AliMatrix(idrotm[nRotMat],theta1,phi1,theta2,phi2,theta3,phi3);
 504
 505    gMC->Gspos("TPSI",ns+1,"TPSG",x,y,z0,idrotm[nRotMat],"ONLY");
 506
 507    nRotMat++;
 508
 509   }
 510
 511   //-------------------------------------------------------------
 512   // outer spokes (nSectorOuter)
 513   //-------------------------------------------------------------
 514
 515   dm[0] = 0.5*(257.9-146.1);
 516   dm[1] = 3.;
 517   dm[2] = 2.;
 518
 519   x1 = dm[0] + 146.;
 520
 521   gMC->Gsvolu("TPSO","BOX ",idtmed[0],dm,3);
 522
 523   dm[1] = dm[1] - 1.;
 524   dm[2] = dm[2] - 1.;
 525
 526   gMC->Gsposp("TPSE",2,"TPSO",0.,0.,0.,0,"ONLY",dm,3);
 527
 528   for(ns=0;ns<nOuterSector;ns++){
 529
 530     phi1 = 0.5*OuterOpenAngle + ns*OuterOpenAngle + OuterAngleShift;
 531     theta1=90.;
 532     phi1 *=kRaddeg;
 533
 534     phi1 = (Float_t)TMath::Nint(phi1);
 535
 536     phi2 = phi1+90.;
 537     if(phi2>360.) phi2 -= 360.;
 538     theta2=90.;
 539     phi3=0.;
 540     theta3=0.;
 541
 542     alpha = phi1 * kDegrad;
 543     x     = x1 * TMath::Cos(alpha);
 544     y     = x1 * TMath::Sin(alpha);
 545
 546    AliMatrix(idrotm[nRotMat],theta1,phi1,theta2,phi2,theta3,phi3);
 547
 548    gMC->Gspos("TPSO",ns+1,"TPSG",x,y,z0,idrotm[nRotMat],"ONLY");
 549
 550    nRotMat++;
 551
 552   }
 553
 554
 555
 556   // --------------------------------------------------------
 557   //         put the readout chambers into the TPC
 558   // --------------------------------------------------------
 559
 560   theta1 = 90.;
 561   phi1   = 0.;
 562   theta2 = 90.;
 563   phi2   = 270.;
 564   theta3 = 180.;
 565   phi3   = 0.;
 566
 567   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 568
 569   z0 = z_side + 250.;
 570
 571   gMC->Gspos("TPSG", 1, "TPC ", 0, 0, z0, 0, "ONLY");
 572   gMC->Gspos("TPSG", 2, "TPC ", 0, 0, -z0, idrotm[nRotMat], "ONLY");
 573
 574   gMC->Gspos("TPC ", 1, "ALIC", 0, 0, 0, 0, "ONLY");
 575
 576   //----------------------------------------------------
 577   //  Inner vessel and HV degrader
 578   //----------------------------------------------------
 579
 580   dm[0] = 0.;
 581   dm[1] = 360.;
 582   dm[2] = 4.;
 583
 584   dm[3] = -250.;
 585   dm[4] = 74.4;
 586   dm[5] = 76.;
 587
 588   dm[6] = -64.5;
 589   dm[7] = 50.;
 590   dm[8] = 76.;
 591
 592   dm[9] = 64.5;
 593   dm[10] = 50.;
 594   dm[11] = 76.;
 595
 596   dm[12] = 250.;
 597   dm[13] = 74.4;
 598   dm[14] = 76.;
 599
 600   gMC->Gsvolu("TPVD", "PCON", idtmed[12], dm, 15); // CO2
 601
 602   // cone parts
 603
 604   dm[0] = 0.;
 605   dm[1] = 360.;
 606   dm[2] = 2.;
 607
 608   dm[3] = 64.5;
 609   dm[4] = 50.;
 610   dm[5] = 51.6;
 611
 612   dm[6] = 250.;
 613   dm[7] = 74.4;
 614   dm[8] = 76.;
 615
 616
 617   gMC->Gsvolu("TIVC","PCON",idtmed[11],dm,9); // C-fibre
 618
 619   gMC->Gspos("TIVC",1,"TPVD",0.,0.,0.,0,"ONLY");
 620   gMC->Gspos("TIVC",2,"TPVD",0.,0.,0.,idrotm[nRotMat],"ONLY");
 621
 622   // barrel part
 623
 624   dm[0] = 50.;
 625   dm[1] = 50.5;
 626   dm[2] = 64.5;
 627
 628   gMC->Gsvolu("TIVB","TUBE",idtmed[9],dm,3);
 629
 630   gMC->Gspos("TIVB",1,"TPVD",0.,0.,0.,0,"ONLY");
 631
 632   gMC->Gspos("TPVD",1,"ALIC",0.,0.,0.,0,"ONLY");
 633
 634
 635
 636
 637
 638   // ---------------------------------------------------
 639   //               volumes ordering
 640   // ---------------------------------------------------
 641   gMC->Gsord("TPSG", 6);
 642
 643 } // end of function
 644
 645
 646 //_____________________________________________________________________________
 647 void AliTPCv0::CreateMaterials()
 648 {
 649   //
 650   // Define materials for the TPC
 651   //
 652   AliTPC::CreateMaterials();
 653 }
 654
 655 //_____________________________________________________________________________
 656 void AliTPCv0::DrawDetector()
 657 {
 658   //
 659   // Draw a shaded view of the Time Projection Chamber version 0
 660   //
 661
 662   // Set everything unseen
 663   gMC->Gsatt("*", "seen", -1);
 664   //
 665   // Set ALIC mother transparent
 666   gMC->Gsatt("ALIC","SEEN",0);
 667   //
 668   // Set the volumes visible
 669   gMC->Gsatt("TPC","SEEN",0);
 670   gMC->Gsatt("TGAS","SEEN",0);
 671   gMC->Gsatt("TPSG","SEEN",0);
 672   gMC->Gsatt("TPHV","SEEN",1);
 673   gMC->Gsatt("TPMH","SEEN",1);
 674   gMC->Gsatt("TPEC","SEEN",0);
 675   gMC->Gsatt("TRCS","SEEN",1);
 676   gMC->Gsatt("TRCL","SEEN",1);
 677   gMC->Gsatt("TPWL","SEEN",1);
 678   gMC->Gsatt("TPWI","SEEN",1);
 679   gMC->Gsatt("TPWS","SEEN",1);
 680   gMC->Gsatt("TPW1","SEEN",1);
 681   gMC->Gsatt("TPS1","SEEN",1);
 682   gMC->Gsatt("TPS2","SEEN",1);
 683   gMC->Gsatt("TPG1","SEEN",1);
 684   gMC->Gsatt("TPG2","SEEN",1);
 685   gMC->Gsatt("TPWC","SEEN",1);
 686   gMC->Gsatt("TPSI","SEEN",1);
 687   gMC->Gsatt("TPSO","SEEN",1);
 688   gMC->Gsatt("TPCO","SEEN",1);
 689   gMC->Gsatt("TPOV","SEEN",1);
 690   gMC->Gsatt("TPVD","SEEN",1);
 691   //
 692   gMC->Gdopt("hide", "on");
 693   gMC->Gdopt("shad", "on");
 694   gMC->Gsatt("*", "fill", 7);
 695   gMC->SetClipBox(".");
 696   gMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
 697   gMC->DefaultRange();
 698   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
 699   gMC->Gdhead(1111, "Time Projection Chamber");
 700   gMC->Gdman(18, 4, "MAN");
 701   gMC->Gdopt("hide","off");
 702 }
 703
 704 //_____________________________________________________________________________
 705 void AliTPCv0::Init()
 706 {
 707   //
 708   // Initialise Time Projection Chamber version 0
 709   //
 710   printf("TPC version 0 initialized\n");
 711 }
 712
 713 //_____________________________________________________________________________
 714 void AliTPCv0::StepManager()
 715 {
 716   //
 717   // Procedure called at each step in the TPC
 718   //
 719 }