TPC/AliTPCv3.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 1.17  2000/11/02 07:24:11  kowal2
  19 Correction in the TPC geometry.
  20 Changes due to the new hit structure.
  21
  22 Revision 1.16  2000/10/02 21:28:18  fca
  23 Removal of useless dependecies via forward declarations
  24
  25 Revision 1.15  2000/07/10 20:57:39  hristov
  26 Update of TPC code and macros by M.Kowalski
  27
  28 Revision 1.14  2000/06/30 12:07:50  kowal2
  29 Updated from the TPC-PreRelease branch
  30
  31 Revision 1.13.2.4  2000/06/26 07:39:42  kowal2
  32 Changes to obey the coding rules
  33
  34 Revision 1.13.2.3  2000/06/25 08:38:41  kowal2
  35 Splitted from AliTPCtracking
  36
  37 Revision 1.13.2.2  2000/06/16 12:58:13  kowal2
  38 Changed parameter settings
  39
  40 Revision 1.13.2.1  2000/06/09 07:15:07  kowal2
  41
  42 Defaults loaded automatically (hard-wired)
  43 Optional parameters can be set via macro called in the constructor
  44
  45 Revision 1.13  2000/05/15 10:00:30  kowal2
  46 Corrected bug in the TPC geometry, thanks to Ivana Hrivnacova
  47
  48 Revision 1.12  2000/04/17 09:37:33  kowal2
  49 removed obsolete AliTPCDigitsDisplay.C
  50
  51 Revision 1.11.8.2  2000/04/10 08:36:12  kowal2
  52
  53 Updated readout chambers
  54 Some modifications to StepManager by M. Kowalski
  55
  56 Revision 1.11.8.1  2000/04/10 07:56:53  kowal2
  57 Not used anymore - removed
  58
  59 Revision 1.11  1999/11/04 17:28:07  fca
  60 Correct barrel part of HV Degrader
  61
  62 Revision 1.10  1999/10/14 16:52:08  fca
  63 Only use PDG codes and not GEANT ones
  64
  65 Revision 1.9  1999/10/08 06:27:23  fca
  66 Corrected bug in the HV degrader geometry, thanks to G.Tabary
  67
  68 Revision 1.8  1999/10/04 13:39:55  fca
  69 Correct array index problem
  70
  71 Revision 1.7  1999/09/29 09:24:34  fca
  72 Introduction of the Copyright and cvs Log
  73
  74 */
  75
  76 //
  77 ///////////////////////////////////////////////////////////////////////////////
  78 //                                                                           //
  79 //  Time Projection Chamber version 3 -- detailed TPC and slow simulation    //
  80 //
  81 //Begin_Html
  82 /*
  83 <img src="picts/AliTPCv3Class.gif">
  84 */
  85 //End_Html
  86 //                                                                           //
  87 //                                                                           //
  88 ///////////////////////////////////////////////////////////////////////////////
  89
  90 #include <stdlib.h>
  91 #include <TMath.h>
  92 #include "AliTPCv3.h"
  93 #include "AliRun.h"
  94 #include "AliMC.h"
  95 #include "AliConst.h"
  96 #include "AliTPCDigitsArray.h"
  97 #include"AliTPCParam.h"
  98 #include"AliTPCParamSR.h"
  99 #include "AliPDG.h"
 100 #include <TInterpreter.h>
 101
 102 ClassImp(AliTPCv3)
 103
 104 //_____________________________________________________________________________
 105 AliTPCv3::AliTPCv3(const char *name, const char *title) :
 106   AliTPC(name, title)
 107 {
 108   //
 109   // Standard constructor for Time Projection Chamber version 3
 110   //
 111
 112   SetBufferSize(128000);
 113   fIdSens=0;
 114
 115   SetGasMixt(2,20,10,-1,0.9,0.1,0.);
 116
 117   if (fTPCParam)
 118      fTPCParam->Write(fTPCParam->GetTitle());
 119 }
 120
 121 //_____________________________________________________________________________
 122 void AliTPCv3::CreateGeometry()
 123 {
 124   //
 125   // Creation of the TPC coarse geometry (version 3)
 126   // The whole drift volume is sensitive
 127   // Origin Marek Kowalski Cracow
 128   //
 129   //Begin_Html
 130   /*
 131     <img src="picts/AliTPCgif">
 132   */
 133   //End_Html
 134   //Begin_Html
 135   /*
 136     <img src="picts/AliTPCv3Tree.gif">
 137   */
 138   //End_Html
 139   Float_t dm[50];
 140
 141   Int_t *idtmed = fIdtmed->GetArray(); // TPC media
 142
 143   Int_t idrotm[120]; // rotation matrices
 144
 145   Int_t nRotMat = 0; // actual number of rotation matrices
 146
 147
 148   //
 149   //  Mother volume (Air) - all volumes will be positioned in it
 150   //
 151
 152   dm[0]=0.;
 153   dm[1]=360.;
 154   dm[2]=12.;
 155
 156   //
 157
 158   dm[3]= -283.7;
 159   dm[4]= 66.2;
 160   dm[5]= 277.95;
 161
 162   //
 163
 164   dm[6]= -255.6;
 165   dm[7]= 66.2;
 166   dm[8]= 277.95;
 167
 168   //
 169
 170   dm[9]= -73.3;
 171   dm[10]= 59.0;
 172   dm[11]= 277.95;
 173
 174   //
 175
 176   dm[12]= -73.3;
 177   dm[13]= 56.9;
 178   dm[14]= 277.95;
 179
 180   //
 181
 182   dm[15]= -72.1;
 183   dm[16]= 56.9;
 184   dm[17]= 277.95;
 185
 186   //
 187
 188   dm[18]= -72.1;
 189   dm[19]= 60.65;
 190   dm[20]= 277.95;
 191
 192   //
 193
 194   dm[21]= 72.1;
 195   dm[22]= 60.65;
 196   dm[23]= 277.95;
 197
 198   //
 199
 200   dm[24]= 72.1;
 201   dm[25]= 56.9;
 202   dm[26]= 277.95;
 203
 204   //
 205
 206   dm[27]= 73.3;
 207   dm[28]= 56.9;
 208   dm[29]= 277.95;
 209
 210   //
 211
 212   dm[30]= 73.3;
 213   dm[31]= 60.65;
 214   dm[32]= 277.95;
 215
 216   //
 217
 218   dm[33]= 250.4;
 219   dm[34]= 66.0;
 220   dm[35]= 277.95;
 221
 222   //
 223
 224   dm[36]= 283.7;
 225   dm[37]= 66.0;
 226   dm[38]= 277.95;
 227
 228
 229   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,39);
 230
 231
 232   //-------------------------------------------------------------------
 233   //  Tpc Outer INsulator (CO2)
 234   //-------------------------------------------------------------------
 235
 236   dm[0]= 0.;
 237   dm[1]= 360.;
 238   dm[2]= 6.;
 239
 240   //
 241
 242   dm[3]= -253.6;
 243   dm[4]= 258.;
 244   dm[5]= 266.65;
 245
 246   //
 247
 248   dm[6]= -253.;
 249   dm[7]= 258.;
 250   dm[8]= 266.65;
 251
 252   dm[9]= -253.;
 253   dm[10]= 258.;
 254   dm[11]= 277.97;
 255
 256   dm[12]= 253.6;
 257   dm[13]= 258.;
 258   dm[14]= 277.97;
 259
 260   //
 261
 262   dm[15]= 253.6;
 263   dm[16]= 265.2;
 264   dm[17]= 277.95;
 265
 266   //
 267
 268   dm[18]= 255.6;
 269   dm[19]= 265.2;
 270   dm[20]= 277.95;
 271
 272
 273   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
 274
 275   //---------------------------------------------------------------
 276   // shreds (G10) - TPC Rings
 277   //---------------------------------------------------------------
 278
 279   gMC->Gsvolu("TPCR","TUBE",idtmed[12],dm,0);
 280
 281   dm[0]= 258.;
 282   dm[1]= 266.65;
 283   dm[2]= 0.3;
 284
 285   gMC->Gsposp("TPCR",1,"TOIN",0.,0.,-253.3,0,"ONLY",dm,3); // left bottom
 286
 287   //
 288
 289   dm[0]= 258.;
 290   dm[1]= 270.9;
 291   dm[2]= 0.3;
 292
 293   gMC->Gsposp("TPCR",2,"TOIN",0.,0.,253.3,0,"ONLY",dm,3); // right
 294
 295   //
 296
 297   dm[0]= 272.2;
 298   dm[1]= 277.95;
 299   dm[2]= 0.3;
 300
 301   gMC->Gsposp("TPCR",3,"TOIN",0.,0.,-250.7,0,"ONLY",dm,3); // left top
 302
 303   //----------------------------------------------------------------
 304   // Tpc Outer Contaiment Vessel
 305   //  mother volume - Al, daughters - composite (sandwich)
 306   //----------------------------------------------------------------
 307
 308   dm[0]= 0.;
 309   dm[1]= 360.;
 310   dm[2]=5.;
 311
 312   //
 313
 314   dm[3]= -250.4;
 315   dm[4]= 272.2;
 316   dm[5]= 277.95;
 317
 318   //
 319
 320   dm[6]= -248.4;
 321   dm[7]= 272.2;
 322   dm[8]= 277.95;
 323
 324   //
 325
 326   dm[9]= 253.6;
 327   dm[10]= 272.2;
 328   dm[11]= 277.95;
 329
 330   //
 331
 332   dm[12]= 253.6;
 333   dm[13]= 265.2;
 334   dm[14]= 277.95;
 335
 336   //
 337
 338   dm[15]= 255.6;
 339   dm[16]= 265.2;
 340   dm[17]= 277.95;
 341
 342   gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,18);
 343
 344   // Daughter volumes
 345
 346   // Tpc SAndwich 1 - Al
 347
 348   dm[0]= 274.81;
 349   dm[1]= 277.95;
 350   dm[2]= 251.7;
 351
 352   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
 353
 354   // Tpc SAndwich 2 - Tedlar
 355
 356   dm[0] += 5.e-3;
 357   dm[1] -= 5.e-3;
 358
 359   gMC->Gsvolu("TSA2","TUBE",idtmed[9],dm,3);
 360
 361   // Tpc SAndwich 3 - Kevlar
 362
 363   dm[0] += 5e-3;
 364   dm[1] -= 5.e-3;
 365
 366   gMC->Gsvolu("TSA3","TUBE",idtmed[5],dm,3);
 367
 368   // Tpc SAndwich 4 - NOMEX honeycomb
 369
 370   dm[0] += 0.06;
 371   dm[1] -= 0.06;
 372
 373   gMC->Gsvolu("TSA4","TUBE",idtmed[5],dm,3);
 374
 375   // 4->3->2->1->TOCV
 376
 377   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
 378   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
 379   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");
 380
 381   gMC->Gspos("TSA1",1,"TOCV",0.,0.,2.6,0,"ONLY");
 382
 383   // TCOV-> TOIN
 384
 385   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
 386
 387   //-------------------------------------------------------
 388   //  Tpc Outer Field Cage
 389   //  mother volume - Al, daughters - composite (sandwich)
 390   //-------------------------------------------------------
 391
 392   dm[0]=0.;
 393   dm[1]=360.;
 394   dm[2]=6.;
 395
 396   dm[3]= -253.;
 397   dm[4]= 258.;
 398   dm[5]= 277.95;
 399
 400   //
 401
 402   dm[6]= -251.;
 403   dm[7]= 258.;
 404   dm[8]= 277.95;
 405
 406   //
 407
 408   dm[9]= -251.;
 409   dm[10]= 258.;
 410   dm[11]= 260.05;
 411
 412   //
 413
 414   dm[12]= 251.;
 415   dm[13]= 258.;
 416   dm[14]= 260.05;
 417
 418   //
 419
 420   dm[15]= 251.;
 421   dm[16]= 258.;
 422   dm[17]= 260.05;
 423
 424   //
 425
 426   dm[18]= 253.;
 427   dm[19]= 258.;
 428   dm[20]= 270.9;
 429
 430   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
 431
 432   // Daughter volumes
 433
 434   // Tpc SAndwich 5 - Tedlar
 435
 436   dm[0]= 258.;
 437   dm[1]= 260.05;
 438   dm[2]= 251.7;
 439
 440   gMC->Gsvolu("TSA5","TUBE",idtmed[9],dm,3);
 441
 442   // Tpc SAndwich 6 - Kevlar
 443
 444   dm[0] += 5.e-3;
 445   dm[1] -= 5.e-3;
 446
 447   gMC->Gsvolu("TSA6","TUBE",idtmed[5],dm,3);
 448
 449
 450   // Tpc SAndwich 7 - NOMEX
 451
 452   dm[0] += 0.02;
 453   dm[1] -= 0.02;
 454
 455   gMC->Gsvolu("TSA7","TUBE",idtmed[6],dm,3);
 456
 457   // 7->6->5->TOFC
 458
 459   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY");
 460   gMC->Gspos("TSA6",1,"TSA5",0.,0.,0.,0,"ONLY");
 461
 462   gMC->Gspos("TSA5",1,"TOFC",0.,0.,0.,0,"ONLY");
 463
 464   // TOFC->TOIN
 465
 466   gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
 467
 468   // TOIN->TPC
 469
 470   gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 471
 472   //--------------------------------------------------------------------
 473   // Tpc Inner INsulator (CO2)
 474   //--------------------------------------------------------------------
 475
 476
 477   dm[0]=0.;
 478   dm[1]= 360.;
 479   dm[2]= 15.;
 480
 481   //
 482
 483   dm[3]= -255.6;
 484   dm[4]= 66.2;
 485   dm[5]= 74.8;
 486
 487   //
 488
 489   Float_t tanL = (66.2-59.0)/(255.6-73.3); // tangent of the left cone part
 490
 491   dm[6]= -253.6;
 492   dm[7]= 59.0+ (253.6-73.3)*tanL;
 493   dm[8]= 74.8;
 494
 495   //
 496
 497   dm[9]= -253.6;
 498   dm[10]= dm[7];
 499   dm[11]= 79.2;
 500
 501   //
 502
 503   dm[12]= -73.3;
 504   dm[13]= 59.0;
 505   dm[14]= 79.2;
 506
 507   //
 508
 509   dm[15]= -73.3;
 510   dm[16]= 56.9;
 511   dm[17]= 79.2;
 512
 513   //
 514
 515   dm[18]= -72.1;
 516   dm[19]= 59.6;
 517   dm[20]= 79.2;
 518
 519   //
 520
 521   dm[21]= -72.1;
 522   dm[22]= 60.65;
 523   dm[23]= 79.2;
 524
 525   //
 526
 527   dm[24]= 72.1;
 528   dm[25]= 60.65;
 529   dm[26]= 79.2;
 530
 531   //
 532
 533   dm[27]= 72.1;
 534   dm[28]= 59.6;
 535   dm[29]= 79.2;
 536
 537   //
 538
 539   dm[30]= 73.3;
 540   dm[31]= 56.9;
 541   dm[32]= 79.2;
 542
 543   //
 544
 545   dm[33]= 73.3;
 546   dm[34]= 59.0;
 547   dm[35]= 79.2;
 548
 549   //
 550
 551   dm[36]= 250.4;
 552   dm[37]= 66.0;
 553   dm[38]= 79.2;
 554
 555   //
 556
 557   dm[39]= 253.0;
 558   dm[40]= 66.0;
 559   dm[41]= 79.2;
 560
 561   //
 562
 563   dm[42]= 253.0;
 564   dm[43]= 75.3;
 565   dm[44]= 79.2;
 566
 567   //
 568
 569   dm[45]= 253.6;
 570   dm[46]= 75.3;
 571   dm[47]= 79.2;
 572
 573   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,48);
 574
 575
 576   //--------------------------------------------------------------------
 577   //  Tpc Inner Containment vessel, Left part
 578   //  mother volume - Al, daughter - composite (sandwich)
 579   //--------------------------------------------------------------------
 580
 581   dm[0]= 0.;
 582   dm[1]= 360.;
 583   dm[2]= 8.;
 584
 585   //
 586
 587   dm[3]= -255.6;
 588   dm[4]= 66.2;
 589   dm[5]= 74.8;
 590
 591   //
 592
 593   Float_t cosL = 1./TMath::Sqrt(1.+tanL*tanL);
 594   Float_t sandThick = 2.14; // cone composite thickness
 595
 596
 597   //
 598
 599   dm[6]= -253.6;
 600   dm[7]= 59.0 + (253.6-73.3)*tanL;
 601   dm[8]= 74.8;
 602
 603   //
 604
 605   dm[9]= -253.6;
 606   dm[10]= dm[7];
 607   dm[11]= dm[7]+sandThick/cosL;
 608
 609   //
 610
 611   dm[12]= -75.6;
 612   dm[13]= 59.0+(75.6-73.3)*tanL;
 613   dm[14]= dm[13]+sandThick/cosL;
 614
 615   //
 616
 617   dm[15]= -75.6;
 618   dm[16]= dm[13];
 619   dm[17]= 60.65;
 620
 621   //
 622
 623   dm[18]= -73.3;
 624   dm[19]= 59.0;
 625   dm[20]= 60.65;
 626
 627   //
 628
 629   dm[21]= -73.3;
 630   dm[22]= 56.9;
 631   dm[23]= 60.65;
 632
 633   //
 634
 635   dm[24]= -72.1;
 636   dm[25]= 56.9;
 637   dm[26]= 60.65;
 638
 639   gMC->Gsvolu("TICL","PCON",idtmed[4],dm,27);
 640
 641   // Daughter volumes
 642
 643   // Tpc SAndwich 9 - Al
 644
 645   dm[0]= 0.;
 646   dm[1]= 360.;
 647   dm[2]= 2.;
 648
 649   //
 650
 651   dm[3]= - 254.3;
 652   dm[4]= 59.0+(254.3-73.3)*tanL;
 653   dm[5]= dm[4]+sandThick/cosL;
 654
 655   //
 656
 657   dm[6]= -78.3;
 658   dm[7]= 59.0+(78.3-73.3)*tanL;
 659   dm[8]= dm[7]+sandThick/cosL;
 660
 661   //
 662
 663   gMC->Gsvolu("TSA9","PCON",idtmed[4],dm,9);
 664
 665   // Tpc SAndwich 10 - Tedlar
 666
 667   dm[4]+= 5.e-3/cosL;
 668   dm[5]-= 5.e-3/cosL;
 669
 670   //
 671
 672   dm[7]+= 5.e-3/cosL;
 673   dm[8]+= 5.e-3/cosL;
 674
 675   gMC->Gsvolu("TS10","PCON",idtmed[9],dm,9);
 676
 677   // Tpc SAndwich 11 - Kevlar
 678
 679   dm[4]+= 5.e-3/cosL;
 680   dm[5]-= 5.e-3/cosL;
 681
 682   //
 683
 684   dm[7]+= 5.e-3/cosL;
 685   dm[8]+= 5.e-3/cosL;
 686
 687   gMC->Gsvolu("TS11","PCON",idtmed[5],dm,9);
 688
 689   // Tpc SAndwich 12 - NOMEX
 690
 691   dm[4]+= 0.06/cosL;
 692   dm[5]-= 0.06/cosL;
 693
 694   //
 695
 696   dm[7]+= 0.06/cosL;
 697   dm[8]+= 0.06/cosL;
 698
 699   gMC->Gsvolu("TS12","PCON",idtmed[6],dm,9);
 700
 701   // 12->11->10->9
 702
 703   gMC->Gspos("TS12",1,"TS11",0.,0.,0.,0,"ONLY");
 704   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
 705   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
 706
 707   // TSA9->TICL
 708
 709   gMC->Gspos("TSA9",1,"TICL",0.,0.,0.,0,"ONLY");
 710
 711   //--------------------------------------------------------------------
 712   //  Tpc Inner Containment vessel, Right part
 713   //  mother volume - Al, daughter - composite (sandwich)
 714   //--------------------------------------------------------------------
 715
 716   dm[0]= 0.;
 717   dm[1]= 360.;
 718   dm[2]=8.;
 719
 720   //
 721
 722   dm[3]= 72.1;
 723   dm[4]= 56.9;
 724   dm[5]= 60.65;
 725
 726   //
 727
 728   dm[6]= 73.3;
 729   dm[7]= 56.9;
 730   dm[8]= 60.65;
 731
 732   //
 733
 734   dm[9]= 73.3;
 735   dm[10]= 59.0;
 736   dm[11]= 60.65;
 737
 738   //
 739
 740   Float_t tanR = (66.0-59.0)/(250.5-73.3); // to avoid accuracy problems
 741   Float_t cosR = 1./TMath::Sqrt(1.+tanR*tanR); //as above
 742
 743   //
 744
 745   dm[12]= 75.6;
 746   dm[13]= 59.0+(75.6-73.3)*tanR;
 747   dm[14]= 60.65;
 748
 749   //
 750
 751   dm[15]= 75.6;
 752   dm[16]= dm[13];
 753   dm[17]= dm[16]+sandThick/cosR;
 754
 755   //
 756
 757   dm[18]= 248.4;
 758   dm[19]= 59.0+(248.4-73.3)*tanR;
 759   dm[20]= dm[19]+sandThick/cosR;
 760
 761   //
 762
 763   dm[21]= 248.4;
 764   dm[22]= dm[19];
 765   dm[23]= 70.2;
 766
 767   //
 768
 769   dm[24]= 250.4;
 770   dm[25]= 66.0;
 771   dm[26]= 70.2;
 772
 773   gMC->Gsvolu("TICR","PCON",idtmed[4],dm,27);
 774
 775
 776
 777   // Daughter volumes
 778
 779   // Tpc SAndwich 13 - Al
 780
 781   dm[0]= 0.;
 782   dm[1]= 360.;
 783   dm[2]= 2.;
 784
 785   //
 786
 787   dm[3]= 78.3;
 788   dm[4]= 59.0+(78.3-73.3)*tanR;
 789   dm[5]= dm[4]+sandThick/cosR;
 790
 791   //
 792
 793   dm[6]= 249.1;
 794   dm[7]= 59.0+(249.1-73.3)*tanR;
 795   dm[8]= dm[7]+sandThick/cosR;
 796
 797   //
 798
 799   gMC->Gsvolu("TS13","PCON",idtmed[4],dm,9);
 800
 801   // Tpc SAndwich 14 - Tedlar
 802
 803   dm[4]+= 5.e-3/cosR;
 804   dm[5]-= 5.e-3/cosR;
 805
 806   //
 807
 808   dm[7]+= 5.e-3/cosR;
 809   dm[8]+= 5.e-3/cosR;
 810
 811   gMC->Gsvolu("TS14","PCON",idtmed[9],dm,9);
 812
 813   // Tpc SAndwich 15 - Kevlar
 814
 815   dm[4]+= 5.e-3/cosR;
 816   dm[5]-= 5.e-3/cosR;
 817
 818   //
 819
 820   dm[7]+= 5.e-3/cosR;
 821   dm[8]+= 5.e-3/cosR;
 822
 823   gMC->Gsvolu("TS15","PCON",idtmed[5],dm,9);
 824
 825   // Tpc SAndwich 16 - NOMEX
 826
 827   dm[4]+= 0.06/cosR;
 828   dm[5]-= 0.06/cosR;
 829
 830   //
 831
 832   dm[7]+= 0.06/cosR;
 833   dm[8]+= 0.06/cosR;
 834
 835   gMC->Gsvolu("TS16","PCON",idtmed[6],dm,9);
 836
 837   // 16->15->14->13
 838
 839   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
 840   gMC->Gspos("TS15",1,"TS14",0.,0.,0.,0,"ONLY");
 841   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
 842
 843   // TS12->TICR
 844
 845   gMC->Gspos("TS13",1,"TICR",0.,0.,0.,0,"ONLY");
 846
 847   //------------------------------------------------------
 848   // Tpc Inner Field Cage
 849   // mother volume - Al, daughters - composite (sandwich)
 850   //------------------------------------------------------
 851
 852   dm[0]= 0.;
 853   dm[1]= 360.;
 854   dm[2]=6.;
 855
 856   //
 857
 858   dm[3]= -253.0;
 859   dm[4]= 70.7;
 860   dm[5]= 79.2;
 861
 862   //
 863
 864   dm[6]= -251.0;
 865   dm[7]= 70.7;
 866   dm[8]= 79.2;
 867
 868   //
 869
 870   dm[9]= -251.0;
 871   dm[10]= 77.15;
 872   dm[11]= 79.2;
 873
 874   //
 875
 876   dm[12]= 251.0;
 877   dm[13]= 77.15;
 878   dm[14]= 79.2;
 879
 880   //
 881
 882   dm[15]= 251.0;
 883   dm[16]= 66.0;
 884   dm[17]= 79.2;
 885
 886   //
 887
 888   dm[18]= 253.0;
 889   dm[19]= 66.0;
 890   dm[20]= 79.2;
 891
 892   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,21);
 893
 894   // Daughter volumes
 895
 896   // Tpc Sandwich 17 - Tedlar
 897
 898   dm[0]= 77.15;
 899   dm[1]= 79.2;
 900   dm[2]= 251.7;
 901
 902   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
 903
 904   // Tpc Sandwich 18 - Kevlar
 905
 906   dm[0]+= 5.e-3;
 907   dm[1]-= 5.e-3;
 908
 909   gMC->Gsvolu("TS18","TUBE",idtmed[5],dm,3);
 910
 911
 912   // Tpc Sandwich 19 - NOMEX
 913
 914   dm[0]+= 0.02;
 915   dm[1]-= 0.02;
 916
 917   gMC->Gsvolu("TS19","TUBE",idtmed[6],dm,3);
 918
 919   // 19->18->17
 920
 921   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY");
 922   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
 923
 924   // TS17->TIFC
 925
 926   gMC->Gspos("TS17",1,"TIFC",0.,0.,0.,0,"ONLY");
 927
 928   // TPC Rings
 929
 930   dm[0]= 70.7;
 931   dm[1]= 79.2;
 932   dm[2]= 0.3;
 933
 934   gMC->Gsposp("TPCR",4,"TIIN",0.,0.,-253.3,0,"ONLY",dm,3);
 935
 936   dm[0]= 66.0;
 937   dm[1]= 70.2;
 938
 939   gMC->Gsposp("TPCR",5,"TIIN",0.,0.,250.7,0,"ONLY",dm,3);
 940
 941   dm[0]= 75.3;
 942   dm[1]= 79.2;
 943
 944   gMC->Gsposp("TPCR",6,"TIIN",0.,0.,253.3,0,"ONLY",dm,3);
 945
 946   // TICL->TIIN
 947
 948   gMC->Gspos("TICL",1,"TIIN",0.,0.,0.,0,"ONLY");
 949
 950   // TICR->TIIN
 951
 952   gMC->Gspos("TICR",1,"TIIN",0.,0.,0.,0,"ONLY");
 953
 954   // TIFC->TIIN
 955
 956   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
 957
 958   // Tpc Sandwich 21 - Al (central barrel)
 959
 960   dm[0]= 60.65;
 961   dm[1]= 61.21;
 962   dm[2]= 75.2;
 963
 964   gMC->Gsvolu("TS21","TUBE",idtmed[4],dm,3);
 965
 966   // Tpc Sandwich 22 - Tedlar (central barrel)
 967
 968   dm[0]+= 5.e-3;
 969   dm[1]-= 5.e-3;
 970
 971   gMC->Gsvolu("TS22","TUBE",idtmed[9],dm,3);
 972
 973   // Tpc Sandwich 23 - Kevlar (central barrel)
 974
 975   dm[0]+= 5.e-3;
 976   dm[1]-= 5.e-3;
 977
 978   gMC->Gsvolu("TS23","TUBE",idtmed[5],dm,3);
 979
 980   // Tpc Sandwich 24 - NOMEX (central barrel)
 981
 982   dm[0]+= 0.02;
 983   dm[1]-= 0.02;
 984
 985   gMC->Gsvolu("TS24","TUBE",idtmed[6],dm,3);
 986
 987   // 24->23->22->21
 988
 989   gMC->Gspos("TS24",1,"TS23",0.,0.,0.,0,"ONLY");
 990   gMC->Gspos("TS23",1,"TS22",0.,0.,0.,0,"ONLY");
 991   gMC->Gspos("TS22",1,"TS21",0.,0.,0.,0,"ONLY");
 992
 993   gMC->Gspos("TS21",1,"TIIN",0.,0.,0.,0,"ONLY");
 994
 995   // put everything into the TPC
 996
 997   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 998
 999
1000   //---------------------------------------------------------
1001   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
1002   //  and its daughters (HV membrane, rods, readout chambers)
1003   //---------------------------------------------------------
1004
1005   dm[0]= 79.2;
1006   dm[1]= 258.0;
1007   dm[2]= 253.6;
1008
1009   gMC->Gsvolu("TDGS","TUBE",idtmed[2],dm,3);
1010
1011   // sector opening angles
1012
1013   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
1014
1015   // sector angle shift
1016
1017   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
1018
1019   // number of sectors
1020
1021   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
1022   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
1023
1024   // All above parameters are identical for inner and outer
1025   // sectors. The distinction is kept for the historical reasons
1026   // and eventually will disappear.
1027
1028   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
1029   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
1030   Float_t space;
1031
1032   //-------------------------------------------------------------------------
1033   //   Tpc Inner Readout Chambers
1034   //-------------------------------------------------------------------------
1035
1036   dm[0]= 14.483;
1037   dm[1]= 23.3345;
1038   dm[2]= 1.6; // thickness
1039   dm[3]= 25.1;
1040
1041   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
1042
1043   // this volume will be positioned in the empty space
1044   // of the end-cap to avoid overlaps
1045
1046   dm[0]= 13.7305;
1047   dm[1]= 21.1895;
1048   dm[2]= 2.25;
1049   dm[3]= 21.15;
1050
1051   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
1052
1053
1054   //------------------------------------------------
1055   // Tpc Inner readout chamber Pad Plane
1056   //------------------------------------------------
1057
1058   dm[0]= 14.483;
1059   dm[1]= 23.3345;
1060   dm[2]= 0.5;
1061   dm[3]= 25.1;
1062
1063   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
1064
1065   //
1066
1067   dm[0] -= 1.218511934;
1068   dm[1] -= 1.218511934;
1069   dm[2] = 0.35;
1070
1071   gMC->Gsvolu("TIC3","TRD1",idtmed[2],dm,4);
1072
1073   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
1074
1075   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
1076
1077
1078   //----------------------------------------------
1079   // Tpc Readout Chambers Empty spaces - for both
1080   // inner and outer sectors
1081   //----------------------------------------------
1082
1083   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
1084
1085   // Inner sector - 4 spaces
1086
1087
1088   dm[3] = 4.7625;
1089   dm[0] = 12.472;
1090
1091   Float_t rr = 90.52;
1092   Float_t zz;
1093
1094   zz= -12.7875;
1095
1096   space = rr*tanAlpha-dm[0];
1097
1098   for(Int_t nsLow=0;nsLow<4;nsLow++){
1099
1100     rr += 9.525;
1101     dm[1]= rr*tanAlpha - space;
1102
1103     dm[2]=0.8;
1104
1105     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
1106
1107     //
1108
1109     dm[2]= 1.2;
1110
1111     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
1112
1113     rr += 0.4;
1114     dm[0] = rr*tanAlpha - space;
1115     zz += (0.4+9.525);
1116
1117   }
1118
1119   dm[0]= 12.472;
1120   // dm[1] - this is the dm[1] from the previous TRCE
1121   dm[2]= 1.05;
1122   dm[3]= 19.65;
1123
1124   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.,0.,0,"ONLY",dm,4);
1125
1126   //
1127   // TPc Space for Connectors
1128   //
1129
1130   dm[0]= .3;
1131   dm[1]= .3;
1132   dm[2]= 4.5;
1133
1134   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
1135
1136   // TPC Connectors
1137
1138   dm[0]= .25;
1139   dm[1]= .15;
1140   dm[2]= 3.75;
1141
1142   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3);
1143
1144   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1145
1146   zz = -12.7875;
1147
1148
1149   Float_t alpha;
1150   Float_t astep;
1151
1152   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
1153
1154   // inner part of the inner sector - 2 x 20 holes
1155
1156   astep = 20.00096874/19.;
1157
1158   alpha = 10.00048437-astep;
1159
1160   Float_t x1,x2;
1161
1162     x1 = 13.31175725;
1163     x1 -= 0.996357832;
1164
1165     x2 = 15.06180253;
1166     x2 -= 1.163028812;
1167
1168   Int_t ncon;
1169
1170   for(ncon=0;ncon<20;ncon++){
1171
1172     phi1 = 0.;
1173     theta1 = 90.+alpha;
1174     phi2=90.;
1175     theta2 = 90.;
1176     phi3 = (alpha>0) ? 0. : 180.;
1177     theta3 = TMath::Abs(alpha);
1178
1179     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1180
1181
1182
1183     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1184     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1185
1186
1187     x1 -= 1.296357833;
1188     x2 -= 1.463028812;
1189
1190     alpha -= astep;
1191     nRotMat++;
1192
1193   }
1194
1195   // outer part of the inner sector - 2 x 25 holes
1196
1197    astep = 20.00096874/24.;
1198    alpha = 10.00048437-astep;
1199
1200    x1 = 16.81184781;
1201    x1 -= 1.016295986;
1202
1203    x2 = 18.5618931;
1204    x2 -= 1.150914854;
1205
1206   for(ncon=0;ncon<25;ncon++){
1207
1208     phi1 = 0.;
1209     theta1 = 90.+alpha;
1210     phi2=90.;
1211     theta2 = 90.;
1212     phi3 = (alpha>0) ? 0. : 180.;
1213     theta3 = TMath::Abs(alpha);
1214
1215     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1216
1217
1218
1219     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1220     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1221
1222
1223     x1 -= 1.316295986;
1224     x2 -= 1.450914854;
1225
1226     alpha -= astep;
1227     nRotMat++;
1228
1229   }
1230
1231   //--------------------------------------------------------------------------
1232   //  TPC Outer Readout Chambers
1233   //  this is NOT a final design
1234   //--------------------------------------------------------------------------
1235
1236   dm[0]= 23.3875;
1237   dm[1]= 43.524;
1238   dm[2]= 1.5; //thickness
1239   dm[3]= 57.1;
1240
1241   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1242
1243   //------------------------------------------------
1244   // Tpc Outerr readout chamber Pad Plane
1245   //------------------------------------------------
1246
1247   dm[2]= 0.5;
1248
1249   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1250
1251   dm[0] -= 1.218511934;
1252   dm[1] -= 1.218511934;
1253   dm[2] = 0.35;
1254
1255   gMC->Gsvolu("TOC3","TRD1",idtmed[2],dm,4);
1256
1257   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1258
1259   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1260
1261   // empty space
1262
1263
1264   dm[0]= 21.035;
1265   dm[1]= 38.7205;
1266   dm[2]= 0.7;
1267   dm[3]= 50.15;
1268
1269   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);
1270
1271   dm[0]= 22.2935;
1272   dm[1]= 40.5085;
1273   dm[2]= 2.25;
1274   dm[3]= 51.65;
1275
1276   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1277
1278
1279   dm[0]= 21.35;
1280   dm[1]= 38.7205;
1281   dm[2]= 2.25;
1282   dm[3]= 50.15;
1283
1284   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1285
1286
1287   //-----------------------------------------------
1288   // Tpc Services Support Wheel
1289   //-----------------------------------------------
1290
1291   dm[0]=0.;
1292   dm[1]=360.;
1293   dm[2]=18.;
1294   dm[3]=2.;
1295
1296   dm[4]= -5.;
1297   dm[5]= 77.017;
1298   dm[6]= 255.267;
1299
1300   dm[7]= 5.;
1301   dm[8]= dm[5];
1302   dm[9]= dm[6];
1303
1304   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1305
1306   // Tpc Services Wheel Cover
1307
1308   dm[4]= -0.5;
1309   dm[7]= 0.5;
1310
1311   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1312
1313   // Tpc Service wheel Cover Empty space
1314
1315   dm[0]= 10.99;
1316   dm[1]= 39.599;
1317   dm[2]= .5;
1318   dm[3]= 81.125;
1319
1320   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1321
1322   // Tpc services Wheel Empty Spaces
1323
1324   dm[0]= 13.18017507;
1325   dm[1]= 44.61045938;
1326   dm[2]= 4.;
1327   dm[3]= 89.125;
1328
1329   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1330
1331   // Tpc Services Wheel Bars
1332
1333   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1334
1335   // bars-> TWES
1336
1337   dm[2]= 4.;
1338   dm[3]= .4;
1339
1340   dm[0]= 13.8149522;
1341   dm[1]= 13.95601379;
1342
1343   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1344
1345   dm[0]= 43.83462067;
1346   dm[1]= 43.97568225;
1347
1348   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1349
1350   // TPc ELectronics - right now 30% X0 Si
1351
1352   dm[0]= 14.03813696;
1353   dm[1]= 43.3524075;
1354   dm[2]= 1.404;
1355   dm[3]= 83.125;
1356
1357   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1358   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1359
1360
1361   //--------------------------------------------------------------------------
1362   //  End caps
1363   //--------------------------------------------------------------------------
1364
1365   // TPc Main Wheel - Al
1366
1367   dm[0]= 75.3;
1368   dm[1]= 264.8;
1369   dm[2]= 3.0;
1370
1371   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1372
1373   // TPc Extra Wheel (to avoid overlapping) - Al
1374
1375   dm[0]= 264.8;
1376   dm[1]= 277.0;
1377   dm[2]= 1.95;
1378
1379   gMC->Gsvolu("TPEW","TUBE",idtmed[4],dm,3);
1380
1381   //--------------------------------------------------------------------------
1382   //  Tpc Empty Space for the Readout chambers
1383   //--------------------------------------------------------------------------
1384
1385   Float_t rLow= 86.2;
1386   Float_t rUp= 243.5;
1387   Float_t dR = 0.5*(rUp-rLow);
1388
1389   space= 1.4/cosAlpha; // wheel ribs are 2.8 cm wide
1390
1391   dm[0]= rLow*tanAlpha-space;
1392   dm[1]= rUp*tanAlpha-space;
1393   dm[2]= 3.0;
1394   dm[3]= dR;
1395
1396   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1397
1398   // TIC1->TESR
1399
1400
1401   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1402
1403
1404   // TOC1->TESR
1405
1406   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1407
1408   // Tpc Empty Space Bars - Al (daughters of TESR)
1409
1410   Float_t zBar;
1411
1412   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1413
1414   // lower bar
1415
1416   dm[0]= rLow*tanAlpha-space;
1417   dm[1]= 88.7*tanAlpha-space;
1418   dm[2]= 0.95;
1419   dm[3]= 1.275;
1420
1421   zBar = -dR+dm[3];
1422
1423   gMC->Gsposp("TESB",1,"TESR",0.,2.05,zBar,0,"ONLY",dm,4);
1424
1425   // middle bar
1426
1427   dm[0]= 131.65*tanAlpha-space;
1428   dm[1]= 136.5*tanAlpha-space;
1429   dm[3]= 2.425;
1430
1431   zBar = -dR +131.65+dm[3]-rLow;
1432
1433   gMC->Gsposp("TESB",2,"TESR",0.,2.05,zBar,0,"ONLY",dm,4);
1434
1435   // upper bar
1436
1437   dm[0]= 240.4*tanAlpha-space;
1438   dm[1]= rUp*tanAlpha-space;
1439   dm[3]= 1.55;
1440
1441   zBar = dR-dm[3];
1442
1443   gMC->Gsposp("TESB",3,"TESR",0.,2.05,zBar,0,"ONLY",dm,4);
1444
1445   //  positioning of the empty spaces into the main wheel
1446
1447   Float_t rCenter,xc,yc;
1448   Float_t rInner,rOuter; // center of the inner and outer chamber
1449
1450   rCenter = rLow+dR;
1451
1452   rInner = 108.07;
1453   rOuter = 190.68;
1454
1455   for(Int_t ns=0; ns<nInnerSector;ns++){
1456
1457     phi1 = ns * innerOpenAngle + innerAngleShift;
1458     phi1 *= kRaddeg; // in degrees
1459
1460     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1461
1462     if (phi1 > 360.) phi1 -= 360.;
1463
1464     theta1 = 90.;
1465     phi2   = 90.;
1466     theta2 = 180.;
1467     phi3   = ns * innerOpenAngle + innerAngleShift;
1468     phi3 *= kRaddeg; // in degrees
1469
1470     phi3 = (Float_t)TMath::Nint(phi3);
1471
1472     if(phi3 > 360.) phi3 -= 360.;
1473
1474     theta3 = 90.;
1475
1476     // "holes"->End plate
1477
1478     xc = rCenter*TMath::Cos(phi3*kDegrad);
1479     yc = rCenter*TMath::Sin(phi3*kDegrad);
1480
1481     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1482
1483     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1484
1485     // TSCE->TSWC (services wheel volumes)
1486
1487     xc = 166.142*TMath::Cos(phi3*kDegrad);
1488     yc = 166.142*TMath::Sin(phi3*kDegrad);
1489
1490     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1491     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1492
1493
1494     // readout chambers->TDGS (drift gas)
1495
1496     xc = rInner*TMath::Cos(phi3*kDegrad);
1497     yc = rInner*TMath::Sin(phi3*kDegrad);
1498
1499     gMC->Gspos("TIRC",ns+1,"TDGS",xc,yc,252.,idrotm[nRotMat],"ONLY");
1500
1501     xc = rOuter*TMath::Cos(phi3*kDegrad);
1502     yc = rOuter*TMath::Sin(phi3*kDegrad);
1503
1504     gMC->Gspos("TORC",ns+1,"TDGS",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1505
1506     nRotMat++;
1507
1508     theta2 = 0.; // reflection
1509
1510     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1511
1512     xc = rInner*TMath::Cos(phi3*kDegrad);
1513     yc = rInner*TMath::Sin(phi3*kDegrad);
1514
1515     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGS",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1516
1517     xc = rOuter*TMath::Cos(phi3*kDegrad);
1518     yc = rOuter*TMath::Sin(phi3*kDegrad);
1519
1520     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGS",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1521
1522     nRotMat++;
1523
1524
1525   }
1526
1527
1528   // reflection matrix
1529
1530   theta1 = 90.;
1531   phi1   = 0.;
1532   theta2 = 90.;
1533   phi2   = 270.;
1534   theta3 = 180.;
1535   phi3   = 0.;
1536
1537   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1538
1539
1540   // TPMW->TPC
1541
1542   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1543   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[nRotMat],"ONLY");
1544   gMC->Gspos("TPEW",1,"TPC ",0.,0.,257.65,0,"ONLY");
1545   gMC->Gspos("TPEW",2,"TPC ",0.,0.,-257.65,0,"ONLY");
1546
1547
1548
1549   //-------------------------------------------------------
1550   // Tpc High Voltage Membrane - NOMEX honeycomb
1551   //-------------------------------------------------------
1552
1553   dm[0]=0.,
1554   dm[1]=360.;
1555   dm[2]=18.;
1556   dm[3]=2.;
1557
1558   //
1559
1560   dm[4]= -0.3;
1561   dm[5]= 81.156;
1562   dm[6]= 253.386;
1563
1564   //
1565
1566   dm[7]= 0.3;
1567   dm[8]= dm[5];
1568   dm[9]= dm[6];
1569
1570   gMC->Gsvolu("THVM","PGON",idtmed[6],dm,10);
1571
1572   gMC->Gspos("THVM",1,"TDGS",0.,0.,0.,0,"ONLY");
1573
1574   //----------------------------------------------------------
1575   // TPc Support Rods - MAKROLON
1576   //----------------------------------------------------------
1577
1578   dm[0]= 0.9;
1579   dm[1]= 1.2;
1580   dm[2]= 126.65;
1581
1582   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,3);
1583
1584   for(Int_t nrod=1;nrod<18;nrod++){
1585     Float_t angle=innerOpenAngle*(Float_t)nrod;
1586
1587     xc=82.4*TMath::Cos(angle);
1588     yc=82.4*TMath::Sin(angle);
1589
1590     gMC->Gspos("TPSR",nrod,"TDGS",xc,yc,126.95,0,"ONLY");
1591     gMC->Gspos("TPSR",nrod+17,"TDGS",xc,yc,-126.95,0,"ONLY");
1592
1593     xc=254.2*TMath::Cos(angle);
1594     yc=254.2*TMath::Sin(angle);
1595
1596     gMC->Gspos("TPSR",nrod+34,"TDGS",xc,yc,126.95,0,"ONLY");
1597     gMC->Gspos("TPSR",nrod+51,"TDGS",xc,yc,-126.95,0,"ONLY");
1598
1599   }
1600
1601   //----------------------------------------------------------
1602   // Tpc High Voltage rod - MAKROLON + Copper cable
1603   //----------------------------------------------------------
1604
1605   // rod with cable (Left)
1606
1607   dm[0]=0.;
1608   dm[1]=2.25;
1609   dm[2]=126.65;
1610
1611   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1612
1613   // HV cable
1614
1615   dm[0]=0.;
1616   dm[1]=0.3;
1617   dm[2]=126.65;
1618
1619   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);
1620
1621   // empty space
1622
1623   dm[0]=0.3;
1624   dm[1]=1.;
1625   dm[2]=126.65;
1626
1627   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1628
1629   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1630   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1631
1632   // rod without cable
1633
1634   dm[0]=1.8;
1635   dm[1]=2.25;
1636   dm[2]=126.65;
1637
1638   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1639
1640
1641
1642   gMC->Gspos("THVL",1,"TDGS",82.4,0.,-126.95,0,"ONLY");
1643   gMC->Gspos("THVL",2,"TDGS",254.2,0.,-126.95,0,"ONLY");
1644
1645   gMC->Gspos("THVR",1,"TDGS",82.4,0.,126.95,0,"ONLY");
1646   gMC->Gspos("THVR",2,"TDGS",254.2,0.,126.95,0,"ONLY");
1647
1648
1649
1650   gMC->Gspos("TDGS",1,"TPC ",0.,0.,0.,0,"ONLY");
1651
1652   // services wheel cover -> wheel
1653
1654
1655   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1656   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1657
1658
1659   // put the wheel into the TPC
1660
1661   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1662   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1663
1664   gMC->Gsord("TPMW",6);
1665   gMC->Gsord("TSSW",6);
1666   gMC->Gsord("TSWC",6);
1667
1668   // put the TPC into ALIC (main mother volume)
1669
1670   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1671
1672
1673 } // end of function
1674
1675 //_____________________________________________________________________________
1676 void AliTPCv3::DrawDetector()
1677 {
1678   //
1679   // Draw a shaded view of the Time Projection Chamber version 1
1680   //
1681
1682
1683   // Set everything unseen
1684   gMC->Gsatt("*", "seen", -1);
1685   //
1686   // Set ALIC mother transparent
1687   gMC->Gsatt("ALIC","SEEN",0);
1688   //
1689   // Set the volumes visible
1690   //
1691
1692   gMC->Gsatt("TPC ","SEEN",0);
1693   gMC->Gsatt("TOIN","SEEN",1);
1694   gMC->Gsatt("TOIN","COLO",7);
1695   gMC->Gsatt("TPCR","SEEN",0);
1696   gMC->Gsatt("TOCV","SEEN",1);
1697   gMC->Gsatt("TOCV","COLO",4);
1698   gMC->Gsatt("TSA1","SEEN",0);
1699   gMC->Gsatt("TSA2","SEEN",0);
1700   gMC->Gsatt("TSA3","SEEN",0);
1701   gMC->Gsatt("TSA4","SEEN",0);
1702   gMC->Gsatt("TOFC","SEEN",1);
1703   gMC->Gsatt("TOFC","COLO",4);
1704   gMC->Gsatt("TSA5","SEEN",0);
1705   gMC->Gsatt("TSA6","SEEN",0);
1706   gMC->Gsatt("TSA7","SEEN",0);
1707   gMC->Gsatt("TIIN","COLO",7);
1708   gMC->Gsatt("TIIN","SEEN",1);
1709   gMC->Gsatt("TICL","SEEN",0);
1710   gMC->Gsatt("TSA9","SEEN",0);
1711   gMC->Gsatt("TS10","SEEN",0);
1712   gMC->Gsatt("TS11","SEEN",0);
1713   gMC->Gsatt("TS12","SEEN",0);
1714   gMC->Gsatt("TICR","SEEN",0);
1715   gMC->Gsatt("TS13","SEEN",0);
1716   gMC->Gsatt("TS14","SEEN",0);
1717   gMC->Gsatt("TS15","SEEN",0);
1718   gMC->Gsatt("TS16","SEEN",0);
1719   gMC->Gsatt("TIFC","SEEN",1);
1720   gMC->Gsatt("TIFC","COLO",4);
1721   gMC->Gsatt("TS17","SEEN",0);
1722   gMC->Gsatt("TS18","SEEN",0);
1723   gMC->Gsatt("TS19","SEEN",0);
1724   gMC->Gsatt("TS21","SEEN",0);
1725   gMC->Gsatt("TS22","SEEN",0);
1726   gMC->Gsatt("TS23","SEEN",0);
1727   gMC->Gsatt("TS24","SEEN",0);
1728   gMC->Gsatt("TDGS","SEEN",0);
1729   gMC->Gsatt("TIRC","SEEN",0);
1730   gMC->Gsatt("TIC1","SEEN",1);
1731   gMC->Gsatt("TIPP","SEEN",0);
1732   gMC->Gsatt("TIC3","SEEN",0);
1733   gMC->Gsatt("TRCE","SEEN",0);
1734   gMC->Gsatt("TPSC","SEEN",0);
1735   gMC->Gsatt("TPCC","SEEN",0);
1736   gMC->Gsatt("TORC","SEEN",0);
1737   gMC->Gsatt("TOPP","SEEN",0);
1738   gMC->Gsatt("TOC3","SEEN",0);
1739   gMC->Gsatt("TOC1","SEEN",1);
1740   gMC->Gsatt("TSSW","SEEN",1);
1741   gMC->Gsatt("TSWC","SEEN",1);
1742   gMC->Gsatt("TSCE","SEEN",1);
1743   gMC->Gsatt("TSSW","COLO",3);
1744   gMC->Gsatt("TSWC","COLO",3);
1745   gMC->Gsatt("TSCE","COLO",6);
1746   gMC->Gsatt("TWES","SEEN",0);
1747   gMC->Gsatt("TSWB","SEEN",0);
1748   gMC->Gsatt("TPEL","SEEN",0);
1749   gMC->Gsatt("TPMW","SEEN",1);
1750   gMC->Gsatt("TPEW","SEEN",1);
1751   gMC->Gsatt("TESR","SEEN",1);
1752   gMC->Gsatt("TPMW","COLO",12);
1753   gMC->Gsatt("TPEW","COLO",12);
1754   gMC->Gsatt("TWES","COLO",5);
1755   gMC->Gsatt("TIC1","COLO",5);
1756   gMC->Gsatt("TOC1","COLO",5);
1757   gMC->Gsatt("TESB","SEEN",0);
1758   gMC->Gsatt("TPLS","SEEN",0);
1759   gMC->Gsatt("TPUS","SEEN",0);
1760   gMC->Gsatt("TPSS","SEEN",0);
1761   gMC->Gsatt("THVM","SEEN",1);
1762   gMC->Gsatt("THVM","COLO",11);
1763   gMC->Gsatt("TPSR","SEEN",0);
1764   gMC->Gsatt("THVL","SEEN",0);
1765   gMC->Gsatt("THVC","SEEN",0);
1766   gMC->Gsatt("THVE","SEEN",0);
1767   gMC->Gsatt("THVR","SEEN",0);
1768
1769   //
1770   gMC->Gdopt("hide", "on");
1771   gMC->Gdopt("shad", "on");
1772   gMC->Gsatt("*", "fill", 7);
1773   gMC->SetClipBox(".");
1774   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1775   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1776   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1777   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1778   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1779   gMC->DefaultRange();
1780   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1781   gMC->Gdhead(1111, "Time Projection Chamber");
1782   gMC->Gdman(18, 4, "MAN");
1783   gMC->Gdopt("hide","off");
1784 }
1785
1786 //_____________________________________________________________________________
1787 void AliTPCv3::CreateMaterials()
1788 {
1789   //
1790   // Define materials for version 2 of the Time Projection Chamber
1791   //
1792
1793
1794   //
1795   AliTPC::CreateMaterials();
1796 }
1797
1798 //_____________________________________________________________________________
1799 void AliTPCv3::Init()
1800 {
1801   //
1802   // Initialises version 3 of the TPC after that it has been built
1803   //
1804   Int_t *idtmed = fIdtmed->GetArray();
1805
1806   AliTPC::Init();
1807
1808   fIdSens=gMC->VolId("TDGS"); // drift gas as a sensitive volume
1809
1810   gMC->SetMaxNStep(30000); // max. number of steps increased
1811
1812   gMC->Gstpar(idtmed[2],"LOSS",5);
1813
1814   printf("*** TPC version 3 initialized ***\n");
1815   printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
1816
1817   //
1818
1819 }
1820
1821 //_____________________________________________________________________________
1822 void AliTPCv3::StepManager()
1823 {
1824   //
1825   // Called for every step in the Time Projection Chamber
1826   //
1827
1828   //
1829   // parameters used for the energy loss calculations
1830   //
1831   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1832   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1833   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1834
1835
1836   const Float_t kbig = 1.e10;
1837
1838   Int_t id,copy;
1839   TLorentzVector pos;
1840   Float_t hits[4];
1841   Int_t vol[2];
1842   TClonesArray &lhits = *fHits;
1843
1844   vol[1]=0;
1845   vol[0]=0;
1846
1847   //
1848
1849   gMC->SetMaxStep(kbig);
1850
1851   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1852
1853   Float_t charge = gMC->TrackCharge();
1854
1855   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1856
1857
1858   id=gMC->CurrentVolID(copy);
1859
1860   // Check the sensitive volume
1861
1862   if (id != fIdSens) return;
1863
1864   //
1865   //  charged particle is in the sensitive volume
1866   //
1867
1868   if(gMC->TrackStep() > 0) {
1869
1870
1871     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1872     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1873
1874     gMC->TrackPosition(pos);
1875     hits[0]=pos[0];
1876     hits[1]=pos[1];
1877     hits[2]=pos[2];
1878
1879     //
1880     // check the selected side of the TPC
1881     //
1882
1883     if(fSide && fSide*hits[2]<=0.) return;
1884
1885     hits[3]=(Float_t)nel;
1886
1887     // Add this hit
1888
1889     new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
1890
1891   }
1892
1893   // Stemax calculation for the next step
1894
1895   Float_t pp;
1896   TLorentzVector mom;
1897   gMC->TrackMomentum(mom);
1898   Float_t ptot=mom.Rho();
1899   Float_t betaGamma = ptot/gMC->TrackMass();
1900
1901   Int_t pid=gMC->TrackPid();
1902   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1903     {
1904       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1905     }
1906   else
1907     {
1908       pp=kprim*BetheBloch(betaGamma);
1909       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1910     }
1911
1912   Float_t random[1];
1913   gMC->Rndm(random,1); // good, old GRNDM from Geant3
1914
1915   Double_t rnd = (Double_t)random[0];
1916
1917   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1918
1919 }
1920
1921 //_____________________________________________________________________________
1922 Float_t AliTPCv3::BetheBloch(Float_t bg)
1923 {
1924   //
1925   // Bethe-Bloch energy loss formula
1926   //
1927   const Double_t kp1=0.76176e-1;
1928   const Double_t kp2=10.632;
1929   const Double_t kp3=0.13279e-4;
1930   const Double_t kp4=1.8631;
1931   const Double_t kp5=1.9479;
1932
1933   Double_t dbg = (Double_t) bg;
1934
1935   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1936
1937   Double_t aa = TMath::Power(beta,kp4);
1938   Double_t bb = TMath::Power(1./dbg,kp5);
1939
1940   bb=TMath::Log(kp3+bb);
1941
1942   return ((Float_t)((kp2-aa-bb)*kp1/aa));
1943 }