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 1.21  2000/11/30 11:48:50  kowal2
  19 TLorentzVector.h adde to satisfy the latest changes by Federico
  20
  21 Revision 1.20  2000/11/14 10:48:57  kowal2
  22 Correct material used for TSA4. Thanks to J. Barbosa.
  23
  24 Revision 1.19  2000/11/06 17:24:10  kowal2
  25 Corrected bug in the outer containment vessel and
  26 the outer field cage geometry.
  27 Thanks to J. Barbosa.
  28
  29 Revision 1.18  2000/11/02 16:55:24  kowal2
  30 Corrected bug in the inner containment vessel geometry.
  31 Thanks to J. Belikov
  32
  33 Revision 1.17  2000/11/02 07:24:11  kowal2
  34 Correction in the TPC geometry.
  35 Changes due to the new hit structure.
  36
  37 Revision 1.16  2000/10/02 21:28:18  fca
  38 Removal of useless dependecies via forward declarations
  39
  40 Revision 1.15  2000/07/10 20:57:39  hristov
  41 Update of TPC code and macros by M.Kowalski
  42
  43 Revision 1.14  2000/06/30 12:07:50  kowal2
  44 Updated from the TPC-PreRelease branch
  45
  46 Revision 1.13.2.4  2000/06/26 07:39:42  kowal2
  47 Changes to obey the coding rules
  48
  49 Revision 1.13.2.3  2000/06/25 08:38:41  kowal2
  50 Splitted from AliTPCtracking
  51
  52 Revision 1.13.2.2  2000/06/16 12:58:13  kowal2
  53 Changed parameter settings
  54
  55 Revision 1.13.2.1  2000/06/09 07:15:07  kowal2
  56
  57 Defaults loaded automatically (hard-wired)
  58 Optional parameters can be set via macro called in the constructor
  59
  60 Revision 1.13  2000/05/15 10:00:30  kowal2
  61 Corrected bug in the TPC geometry, thanks to Ivana Hrivnacova
  62
  63 Revision 1.12  2000/04/17 09:37:33  kowal2
  64 removed obsolete AliTPCDigitsDisplay.C
  65
  66 Revision 1.11.8.2  2000/04/10 08:36:12  kowal2
  67
  68 Updated readout chambers
  69 Some modifications to StepManager by M. Kowalski
  70
  71 Revision 1.11.8.1  2000/04/10 07:56:53  kowal2
  72 Not used anymore - removed
  73
  74 Revision 1.11  1999/11/04 17:28:07  fca
  75 Correct barrel part of HV Degrader
  76
  77 Revision 1.10  1999/10/14 16:52:08  fca
  78 Only use PDG codes and not GEANT ones
  79
  80 Revision 1.9  1999/10/08 06:27:23  fca
  81 Corrected bug in the HV degrader geometry, thanks to G.Tabary
  82
  83 Revision 1.8  1999/10/04 13:39:55  fca
  84 Correct array index problem
  85
  86 Revision 1.7  1999/09/29 09:24:34  fca
  87 Introduction of the Copyright and cvs Log
  88
  89 */
  90
  91 //
  92 ///////////////////////////////////////////////////////////////////////////////
  93 //                                                                           //
  94 //  Time Projection Chamber version 3 -- detailed TPC and slow simulation    //
  95 //
  96 //Begin_Html
  97 /*
  98 <img src="picts/AliTPCv3Class.gif">
  99 */
 100 //End_Html
 101 //                                                                           //
 102 //                                                                           //
 103 ///////////////////////////////////////////////////////////////////////////////
 104
 105 #include <stdlib.h>
 106 #include <TMath.h>
 107 #include "AliTPCv3.h"
 108 #include "AliRun.h"
 109 #include "AliMC.h"
 110 #include "AliConst.h"
 111 #include "AliTPCDigitsArray.h"
 112 #include"AliTPCParam.h"
 113 #include"AliTPCParamSR.h"
 114 #include "AliPDG.h"
 115 #include <TInterpreter.h>
 116 #include "TLorentzVector.h"
 117
 118 ClassImp(AliTPCv3)
 119
 120 //_____________________________________________________________________________
 121 AliTPCv3::AliTPCv3(const char *name, const char *title) :
 122   AliTPC(name, title)
 123 {
 124   //
 125   // Standard constructor for Time Projection Chamber version 3
 126   //
 127
 128   SetBufferSize(128000);
 129   fIdSens=0;
 130
 131   SetGasMixt(2,20,10,-1,0.9,0.1,0.);
 132
 133   if (fTPCParam)
 134      fTPCParam->Write(fTPCParam->GetTitle());
 135 }
 136
 137 //_____________________________________________________________________________
 138 void AliTPCv3::CreateGeometry()
 139 {
 140   //
 141   // Creation of the TPC coarse geometry (version 3)
 142   // The whole drift volume is sensitive
 143   // Origin Marek Kowalski Cracow
 144   //
 145   //Begin_Html
 146   /*
 147     <img src="picts/AliTPCgif">
 148   */
 149   //End_Html
 150   //Begin_Html
 151   /*
 152     <img src="picts/AliTPCv3Tree.gif">
 153   */
 154   //End_Html
 155   Float_t dm[50];
 156
 157   Int_t *idtmed = fIdtmed->GetArray(); // TPC media
 158
 159   Int_t idrotm[120]; // rotation matrices
 160
 161   Int_t nRotMat = 0; // actual number of rotation matrices
 162
 163
 164   //
 165   //  Mother volume (Air) - all volumes will be positioned in it
 166   //
 167
 168   dm[0]=0.;
 169   dm[1]=360.;
 170   dm[2]=12.;
 171
 172   //
 173
 174   dm[3]= -283.7;
 175   dm[4]= 66.2;
 176   dm[5]= 277.95;
 177
 178   //
 179
 180   dm[6]= -255.6;
 181   dm[7]= 66.2;
 182   dm[8]= 277.95;
 183
 184   //
 185
 186   dm[9]= -73.3;
 187   dm[10]= 59.0;
 188   dm[11]= 277.95;
 189
 190   //
 191
 192   dm[12]= -73.3;
 193   dm[13]= 56.9;
 194   dm[14]= 277.95;
 195
 196   //
 197
 198   dm[15]= -72.1;
 199   dm[16]= 56.9;
 200   dm[17]= 277.95;
 201
 202   //
 203
 204   dm[18]= -72.1;
 205   dm[19]= 60.65;
 206   dm[20]= 277.95;
 207
 208   //
 209
 210   dm[21]= 72.1;
 211   dm[22]= 60.65;
 212   dm[23]= 277.95;
 213
 214   //
 215
 216   dm[24]= 72.1;
 217   dm[25]= 56.9;
 218   dm[26]= 277.95;
 219
 220   //
 221
 222   dm[27]= 73.3;
 223   dm[28]= 56.9;
 224   dm[29]= 277.95;
 225
 226   //
 227
 228   dm[30]= 73.3;
 229   dm[31]= 59.;
 230   dm[32]= 277.95;
 231
 232   //
 233
 234   dm[33]= 250.4;
 235   dm[34]= 66.0;
 236   dm[35]= 277.95;
 237
 238   //
 239
 240   dm[36]= 283.7;
 241   dm[37]= 66.0;
 242   dm[38]= 277.95;
 243
 244
 245   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,39);
 246
 247
 248   //-------------------------------------------------------------------
 249   //  Tpc Outer INsulator (CO2)
 250   //-------------------------------------------------------------------
 251
 252   dm[0]= 0.;
 253   dm[1]= 360.;
 254   dm[2]= 6.;
 255
 256   //
 257
 258   dm[3]= -253.6;
 259   dm[4]= 258.;
 260   dm[5]= 266.65;
 261
 262   //
 263
 264   dm[6]= -253.;
 265   dm[7]= 258.;
 266   dm[8]= 266.65;
 267
 268   dm[9]= -253.;
 269   dm[10]= 258.;
 270   dm[11]= 277.97;
 271
 272   dm[12]= 253.6;
 273   dm[13]= 258.;
 274   dm[14]= 277.97;
 275
 276   //
 277
 278   dm[15]= 253.6;
 279   dm[16]= 265.2;
 280   dm[17]= 277.95;
 281
 282   //
 283
 284   dm[18]= 255.6;
 285   dm[19]= 265.2;
 286   dm[20]= 277.95;
 287
 288
 289   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
 290
 291   //---------------------------------------------------------------
 292   // shreds (G10) - TPC Rings
 293   //---------------------------------------------------------------
 294
 295   gMC->Gsvolu("TPCR","TUBE",idtmed[12],dm,0);
 296
 297   dm[0]= 258.;
 298   dm[1]= 266.65;
 299   dm[2]= 0.3;
 300
 301   gMC->Gsposp("TPCR",1,"TOIN",0.,0.,-253.3,0,"ONLY",dm,3); // left bottom
 302
 303   //
 304
 305   dm[0]= 258.;
 306   dm[1]= 270.9;
 307   dm[2]= 0.3;
 308
 309   gMC->Gsposp("TPCR",2,"TOIN",0.,0.,253.3,0,"ONLY",dm,3); // right
 310
 311   //
 312
 313   dm[0]= 272.2;
 314   dm[1]= 277.95;
 315   dm[2]= 0.3;
 316
 317   gMC->Gsposp("TPCR",3,"TOIN",0.,0.,-250.7,0,"ONLY",dm,3); // left top
 318
 319   //----------------------------------------------------------------
 320   // Tpc Outer Contaiment Vessel
 321   //  mother volume - Al, daughters - composite (sandwich)
 322   //----------------------------------------------------------------
 323
 324   dm[0]= 0.;
 325   dm[1]= 360.;
 326   dm[2]=6.;
 327
 328   //
 329
 330   dm[3]= -250.4;
 331   dm[4]= 272.2;
 332   dm[5]= 277.95;
 333
 334   //
 335
 336   dm[6]= -248.4;
 337   dm[7]= 272.2;
 338   dm[8]= 277.95;
 339
 340   //
 341
 342   dm[9]= -248.4;
 343   dm[10]= 274.81;
 344   dm[11]= 277.95;
 345
 346   //
 347
 348   dm[12]= 253.6;
 349   dm[13]= 274.81;
 350   dm[14]= 277.95;
 351
 352   //
 353
 354   dm[15]= 253.6;
 355   dm[16]= 265.2;
 356   dm[17]= 277.95;
 357
 358   //
 359
 360   dm[18]= 255.6;
 361   dm[19]= 265.2;
 362   dm[20]= 277.95;
 363
 364   gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,21);
 365
 366   // Daughter volumes
 367
 368   // Tpc SAndwich 1 - Al
 369
 370   dm[0]= 274.81;
 371   dm[1]= 277.95;
 372   dm[2]= 251.7;
 373
 374   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
 375
 376   // Tpc SAndwich 2 - Tedlar
 377
 378   dm[0] += 5.e-3;
 379   dm[1] -= 5.e-3;
 380
 381   gMC->Gsvolu("TSA2","TUBE",idtmed[9],dm,3);
 382
 383   // Tpc SAndwich 3 - Kevlar
 384
 385   dm[0] += 5e-3;
 386   dm[1] -= 5.e-3;
 387
 388   gMC->Gsvolu("TSA3","TUBE",idtmed[5],dm,3);
 389
 390   // Tpc SAndwich 4 - NOMEX honeycomb
 391
 392   dm[0] += 0.06;
 393   dm[1] -= 0.06;
 394
 395   gMC->Gsvolu("TSA4","TUBE",idtmed[6],dm,3);
 396
 397   // 4->3->2->1->TOCV
 398
 399   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
 400   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
 401   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");
 402
 403   gMC->Gspos("TSA1",1,"TOCV",0.,0.,2.6,0,"ONLY");
 404
 405   // TCOV-> TOIN
 406
 407   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
 408
 409   //-------------------------------------------------------
 410   //  Tpc Outer Field Cage
 411   //  mother volume - Al, daughters - composite (sandwich)
 412   //-------------------------------------------------------
 413
 414   dm[0]=0.;
 415   dm[1]=360.;
 416   dm[2]=6.;
 417
 418   dm[3]= -253.;
 419   dm[4]= 258.;
 420   dm[5]= 277.95;
 421
 422   //
 423
 424   dm[6]= -251.;
 425   dm[7]= 258.;
 426   dm[8]= 277.95;
 427
 428   //
 429
 430   dm[9]= -251.;
 431   dm[10]= 258.;
 432   dm[11]= 260.05;
 433
 434   //
 435
 436   dm[12]= 251.;
 437   dm[13]= 258.;
 438   dm[14]= 260.05;
 439
 440   //
 441
 442   dm[15]= 251.;
 443   dm[16]= 258.;
 444   dm[17]= 270.9;
 445
 446   //
 447
 448   dm[18]= 253.;
 449   dm[19]= 258.;
 450   dm[20]= 270.9;
 451
 452   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
 453
 454   // Daughter volumes
 455
 456   // Tpc SAndwich 5 - Tedlar
 457
 458   dm[0]= 258.;
 459   dm[1]= 260.05;
 460   dm[2]= 251.7;
 461
 462   gMC->Gsvolu("TSA5","TUBE",idtmed[9],dm,3);
 463
 464   // Tpc SAndwich 6 - Kevlar
 465
 466   dm[0] += 5.e-3;
 467   dm[1] -= 5.e-3;
 468
 469   gMC->Gsvolu("TSA6","TUBE",idtmed[5],dm,3);
 470
 471
 472   // Tpc SAndwich 7 - NOMEX
 473
 474   dm[0] += 0.02;
 475   dm[1] -= 0.02;
 476
 477   gMC->Gsvolu("TSA7","TUBE",idtmed[6],dm,3);
 478
 479   // 7->6->5->TOFC
 480
 481   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY");
 482   gMC->Gspos("TSA6",1,"TSA5",0.,0.,0.,0,"ONLY");
 483
 484   gMC->Gspos("TSA5",1,"TOFC",0.,0.,0.,0,"ONLY");
 485
 486   // TOFC->TOIN
 487
 488   gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
 489
 490   // TOIN->TPC
 491
 492   gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 493
 494   //--------------------------------------------------------------------
 495   // Tpc Inner INsulator (CO2)
 496   //--------------------------------------------------------------------
 497
 498
 499   dm[0]=0.;
 500   dm[1]= 360.;
 501   dm[2]= 15.;
 502
 503   //
 504
 505   dm[3]= -255.6;
 506   dm[4]= 66.2;
 507   dm[5]= 74.8;
 508
 509   //
 510
 511   Float_t tanL = (66.2-59.0)/(255.6-73.3); // tangent of the left cone part
 512
 513   dm[6]= -253.6;
 514   dm[7]= 59.0+ (253.6-73.3)*tanL;
 515   dm[8]= 74.8;
 516
 517   //
 518
 519   dm[9]= -253.6;
 520   dm[10]= dm[7];
 521   dm[11]= 79.2;
 522
 523   //
 524
 525   dm[12]= -73.3;
 526   dm[13]= 59.0;
 527   dm[14]= 79.2;
 528
 529   //
 530
 531   dm[15]= -73.3;
 532   dm[16]= 56.9;
 533   dm[17]= 79.2;
 534
 535   //
 536
 537   dm[18]= -72.1;
 538   dm[19]= 59.6;
 539   dm[20]= 79.2;
 540
 541   //
 542
 543   dm[21]= -72.1;
 544   dm[22]= 60.65;
 545   dm[23]= 79.2;
 546
 547   //
 548
 549   dm[24]= 72.1;
 550   dm[25]= 60.65;
 551   dm[26]= 79.2;
 552
 553   //
 554
 555   dm[27]= 72.1;
 556   dm[28]= 59.6;
 557   dm[29]= 79.2;
 558
 559   //
 560
 561   dm[30]= 73.3;
 562   dm[31]= 56.9;
 563   dm[32]= 79.2;
 564
 565   //
 566
 567   dm[33]= 73.3;
 568   dm[34]= 59.0;
 569   dm[35]= 79.2;
 570
 571   //
 572
 573   dm[36]= 250.4;
 574   dm[37]= 66.0;
 575   dm[38]= 79.2;
 576
 577   //
 578
 579   dm[39]= 253.0;
 580   dm[40]= 66.0;
 581   dm[41]= 79.2;
 582
 583   //
 584
 585   dm[42]= 253.0;
 586   dm[43]= 75.3;
 587   dm[44]= 79.2;
 588
 589   //
 590
 591   dm[45]= 253.6;
 592   dm[46]= 75.3;
 593   dm[47]= 79.2;
 594
 595   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,48);
 596
 597
 598   //--------------------------------------------------------------------
 599   //  Tpc Inner Containment vessel, Left part
 600   //  mother volume - Al, daughter - composite (sandwich)
 601   //--------------------------------------------------------------------
 602
 603   dm[0]= 0.;
 604   dm[1]= 360.;
 605   dm[2]= 8.;
 606
 607   //
 608
 609   dm[3]= -255.6;
 610   dm[4]= 66.2;
 611   dm[5]= 74.8;
 612
 613   //
 614
 615   Float_t cosL = 1./TMath::Sqrt(1.+tanL*tanL);
 616   Float_t sandThick = 2.14; // cone composite thickness
 617
 618
 619   //
 620
 621   dm[6]= -253.6;
 622   dm[7]= 59.0 + (253.6-73.3)*tanL;
 623   dm[8]= 74.8;
 624
 625   //
 626
 627   dm[9]= -253.6;
 628   dm[10]= dm[7];
 629   dm[11]= dm[7]+sandThick/cosL;
 630
 631   //
 632
 633   dm[12]= -75.6;
 634   dm[13]= 59.0+(75.6-73.3)*tanL;
 635   dm[14]= dm[13]+sandThick/cosL;
 636
 637   //
 638
 639   dm[15]= -75.6;
 640   dm[16]= dm[13];
 641   dm[17]= 60.65;
 642
 643   //
 644
 645   dm[18]= -73.3;
 646   dm[19]= 59.0;
 647   dm[20]= 60.65;
 648
 649   //
 650
 651   dm[21]= -73.3;
 652   dm[22]= 56.9;
 653   dm[23]= 60.65;
 654
 655   //
 656
 657   dm[24]= -72.1;
 658   dm[25]= 56.9;
 659   dm[26]= 60.65;
 660
 661   gMC->Gsvolu("TICL","PCON",idtmed[4],dm,27);
 662
 663   // Daughter volumes
 664
 665   // Tpc SAndwich 9 - Al
 666
 667   dm[0]= 0.;
 668   dm[1]= 360.;
 669   dm[2]= 2.;
 670
 671   //
 672
 673   dm[3]= - 254.3;
 674   dm[4]= 59.0+(254.3-73.3)*tanL;
 675   dm[5]= dm[4]+sandThick/cosL;
 676
 677   //
 678
 679   dm[6]= -78.3;
 680   dm[7]= 59.0+(78.3-73.3)*tanL;
 681   dm[8]= dm[7]+sandThick/cosL;
 682
 683   //
 684
 685   gMC->Gsvolu("TSA9","PCON",idtmed[4],dm,9);
 686
 687   // Tpc SAndwich 10 - Tedlar
 688
 689   dm[4]+= 5.e-3/cosL;
 690   dm[5]-= 5.e-3/cosL;
 691
 692   //
 693
 694   dm[7]+= 5.e-3/cosL;
 695   dm[8]+= 5.e-3/cosL;
 696
 697   gMC->Gsvolu("TS10","PCON",idtmed[9],dm,9);
 698
 699   // Tpc SAndwich 11 - Kevlar
 700
 701   dm[4]+= 5.e-3/cosL;
 702   dm[5]-= 5.e-3/cosL;
 703
 704   //
 705
 706   dm[7]+= 5.e-3/cosL;
 707   dm[8]+= 5.e-3/cosL;
 708
 709   gMC->Gsvolu("TS11","PCON",idtmed[5],dm,9);
 710
 711   // Tpc SAndwich 12 - NOMEX
 712
 713   dm[4]+= 0.06/cosL;
 714   dm[5]-= 0.06/cosL;
 715
 716   //
 717
 718   dm[7]+= 0.06/cosL;
 719   dm[8]+= 0.06/cosL;
 720
 721   gMC->Gsvolu("TS12","PCON",idtmed[6],dm,9);
 722
 723   // 12->11->10->9
 724
 725   gMC->Gspos("TS12",1,"TS11",0.,0.,0.,0,"ONLY");
 726   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
 727   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
 728
 729   // TSA9->TICL
 730
 731   gMC->Gspos("TSA9",1,"TICL",0.,0.,0.,0,"ONLY");
 732
 733   //--------------------------------------------------------------------
 734   //  Tpc Inner Containment vessel, Right part
 735   //  mother volume - Al, daughter - composite (sandwich)
 736   //--------------------------------------------------------------------
 737
 738   dm[0]= 0.;
 739   dm[1]= 360.;
 740   dm[2]=8.;
 741
 742   //
 743
 744   dm[3]= 72.1;
 745   dm[4]= 56.9;
 746   dm[5]= 60.65;
 747
 748   //
 749
 750   dm[6]= 73.3;
 751   dm[7]= 56.9;
 752   dm[8]= 60.65;
 753
 754   //
 755
 756   dm[9]= 73.3;
 757   dm[10]= 59.0;
 758   dm[11]= 60.65;
 759
 760   //
 761
 762   Float_t tanR = (66.0-59.0)/(250.5-73.3); // to avoid accuracy problems
 763   Float_t cosR = 1./TMath::Sqrt(1.+tanR*tanR); //as above
 764
 765   //
 766
 767   dm[12]= 75.6;
 768   dm[13]= 59.0+(75.6-73.3)*tanR;
 769   dm[14]= 60.65;
 770
 771   //
 772
 773   dm[15]= 75.6;
 774   dm[16]= dm[13];
 775   dm[17]= dm[16]+sandThick/cosR;
 776
 777   //
 778
 779   dm[18]= 248.4;
 780   dm[19]= 59.0+(248.4-73.3)*tanR;
 781   dm[20]= dm[19]+sandThick/cosR;
 782
 783   //
 784
 785   dm[21]= 248.4;
 786   dm[22]= dm[19];
 787   dm[23]= 70.2;
 788
 789   //
 790
 791   dm[24]= 250.4;
 792   dm[25]= 66.0;
 793   dm[26]= 70.2;
 794
 795   gMC->Gsvolu("TICR","PCON",idtmed[4],dm,27);
 796
 797
 798
 799   // Daughter volumes
 800
 801   // Tpc SAndwich 13 - Al
 802
 803   dm[0]= 0.;
 804   dm[1]= 360.;
 805   dm[2]= 2.;
 806
 807   //
 808
 809   dm[3]= 78.3;
 810   dm[4]= 59.0+(78.3-73.3)*tanR;
 811   dm[5]= dm[4]+sandThick/cosR;
 812
 813   //
 814
 815   dm[6]= 249.1;
 816   dm[7]= 59.0+(249.1-73.3)*tanR;
 817   dm[8]= dm[7]+sandThick/cosR;
 818
 819   //
 820
 821   gMC->Gsvolu("TS13","PCON",idtmed[4],dm,9);
 822
 823   // Tpc SAndwich 14 - Tedlar
 824
 825   dm[4]+= 5.e-3/cosR;
 826   dm[5]-= 5.e-3/cosR;
 827
 828   //
 829
 830   dm[7]+= 5.e-3/cosR;
 831   dm[8]+= 5.e-3/cosR;
 832
 833   gMC->Gsvolu("TS14","PCON",idtmed[9],dm,9);
 834
 835   // Tpc SAndwich 15 - Kevlar
 836
 837   dm[4]+= 5.e-3/cosR;
 838   dm[5]-= 5.e-3/cosR;
 839
 840   //
 841
 842   dm[7]+= 5.e-3/cosR;
 843   dm[8]+= 5.e-3/cosR;
 844
 845   gMC->Gsvolu("TS15","PCON",idtmed[5],dm,9);
 846
 847   // Tpc SAndwich 16 - NOMEX
 848
 849   dm[4]+= 0.06/cosR;
 850   dm[5]-= 0.06/cosR;
 851
 852   //
 853
 854   dm[7]+= 0.06/cosR;
 855   dm[8]+= 0.06/cosR;
 856
 857   gMC->Gsvolu("TS16","PCON",idtmed[6],dm,9);
 858
 859   // 16->15->14->13
 860
 861   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
 862   gMC->Gspos("TS15",1,"TS14",0.,0.,0.,0,"ONLY");
 863   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
 864
 865   // TS12->TICR
 866
 867   gMC->Gspos("TS13",1,"TICR",0.,0.,0.,0,"ONLY");
 868
 869   //------------------------------------------------------
 870   // Tpc Inner Field Cage
 871   // mother volume - Al, daughters - composite (sandwich)
 872   //------------------------------------------------------
 873
 874   dm[0]= 0.;
 875   dm[1]= 360.;
 876   dm[2]=6.;
 877
 878   //
 879
 880   dm[3]= -253.0;
 881   dm[4]= 70.7;
 882   dm[5]= 79.2;
 883
 884   //
 885
 886   dm[6]= -251.0;
 887   dm[7]= 70.7;
 888   dm[8]= 79.2;
 889
 890   //
 891
 892   dm[9]= -251.0;
 893   dm[10]= 77.15;
 894   dm[11]= 79.2;
 895
 896   //
 897
 898   dm[12]= 251.0;
 899   dm[13]= 77.15;
 900   dm[14]= 79.2;
 901
 902   //
 903
 904   dm[15]= 251.0;
 905   dm[16]= 66.0;
 906   dm[17]= 79.2;
 907
 908   //
 909
 910   dm[18]= 253.0;
 911   dm[19]= 66.0;
 912   dm[20]= 79.2;
 913
 914   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,21);
 915
 916   // Daughter volumes
 917
 918   // Tpc Sandwich 17 - Tedlar
 919
 920   dm[0]= 77.15;
 921   dm[1]= 79.2;
 922   dm[2]= 251.7;
 923
 924   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
 925
 926   // Tpc Sandwich 18 - Kevlar
 927
 928   dm[0]+= 5.e-3;
 929   dm[1]-= 5.e-3;
 930
 931   gMC->Gsvolu("TS18","TUBE",idtmed[5],dm,3);
 932
 933
 934   // Tpc Sandwich 19 - NOMEX
 935
 936   dm[0]+= 0.02;
 937   dm[1]-= 0.02;
 938
 939   gMC->Gsvolu("TS19","TUBE",idtmed[6],dm,3);
 940
 941   // 19->18->17
 942
 943   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY");
 944   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
 945
 946   // TS17->TIFC
 947
 948   gMC->Gspos("TS17",1,"TIFC",0.,0.,0.,0,"ONLY");
 949
 950   // TPC Rings
 951
 952   dm[0]= 70.7;
 953   dm[1]= 79.2;
 954   dm[2]= 0.3;
 955
 956   gMC->Gsposp("TPCR",4,"TIIN",0.,0.,-253.3,0,"ONLY",dm,3);
 957
 958   dm[0]= 66.0;
 959   dm[1]= 70.2;
 960
 961   gMC->Gsposp("TPCR",5,"TIIN",0.,0.,250.7,0,"ONLY",dm,3);
 962
 963   dm[0]= 75.3;
 964   dm[1]= 79.2;
 965
 966   gMC->Gsposp("TPCR",6,"TIIN",0.,0.,253.3,0,"ONLY",dm,3);
 967
 968   // TICL->TIIN
 969
 970   gMC->Gspos("TICL",1,"TIIN",0.,0.,0.,0,"ONLY");
 971
 972   // TICR->TIIN
 973
 974   gMC->Gspos("TICR",1,"TIIN",0.,0.,0.,0,"ONLY");
 975
 976   // TIFC->TIIN
 977
 978   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
 979
 980   // Tpc Sandwich 21 - Al (central barrel)
 981
 982   dm[0]= 60.65;
 983   dm[1]= 61.21;
 984   dm[2]= 75.2;
 985
 986   gMC->Gsvolu("TS21","TUBE",idtmed[4],dm,3);
 987
 988   // Tpc Sandwich 22 - Tedlar (central barrel)
 989
 990   dm[0]+= 5.e-3;
 991   dm[1]-= 5.e-3;
 992
 993   gMC->Gsvolu("TS22","TUBE",idtmed[9],dm,3);
 994
 995   // Tpc Sandwich 23 - Kevlar (central barrel)
 996
 997   dm[0]+= 5.e-3;
 998   dm[1]-= 5.e-3;
 999
1000   gMC->Gsvolu("TS23","TUBE",idtmed[5],dm,3);
1001
1002   // Tpc Sandwich 24 - NOMEX (central barrel)
1003
1004   dm[0]+= 0.02;
1005   dm[1]-= 0.02;
1006
1007   gMC->Gsvolu("TS24","TUBE",idtmed[6],dm,3);
1008
1009   // 24->23->22->21
1010
1011   gMC->Gspos("TS24",1,"TS23",0.,0.,0.,0,"ONLY");
1012   gMC->Gspos("TS23",1,"TS22",0.,0.,0.,0,"ONLY");
1013   gMC->Gspos("TS22",1,"TS21",0.,0.,0.,0,"ONLY");
1014
1015   gMC->Gspos("TS21",1,"TIIN",0.,0.,0.,0,"ONLY");
1016
1017   // put everything into the TPC
1018
1019   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
1020
1021
1022   //---------------------------------------------------------
1023   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
1024   //  and its daughters (HV membrane, rods, readout chambers)
1025   //---------------------------------------------------------
1026
1027   dm[0]= 79.2;
1028   dm[1]= 258.0;
1029   dm[2]= 253.6;
1030
1031   gMC->Gsvolu("TDGS","TUBE",idtmed[2],dm,3);
1032
1033   // sector opening angles
1034
1035   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
1036
1037   // sector angle shift
1038
1039   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
1040
1041   // number of sectors
1042
1043   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
1044   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
1045
1046   // All above parameters are identical for inner and outer
1047   // sectors. The distinction is kept for the historical reasons
1048   // and eventually will disappear.
1049
1050   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
1051   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
1052   Float_t space;
1053
1054   //-------------------------------------------------------------------------
1055   //   Tpc Inner Readout Chambers
1056   //-------------------------------------------------------------------------
1057
1058   dm[0]= 14.483;
1059   dm[1]= 23.3345;
1060   dm[2]= 1.6; // thickness
1061   dm[3]= 25.1;
1062
1063   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
1064
1065   // this volume will be positioned in the empty space
1066   // of the end-cap to avoid overlaps
1067
1068   dm[0]= 13.7305;
1069   dm[1]= 21.1895;
1070   dm[2]= 2.25;
1071   dm[3]= 21.15;
1072
1073   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
1074
1075
1076   //------------------------------------------------
1077   // Tpc Inner readout chamber Pad Plane
1078   //------------------------------------------------
1079
1080   dm[0]= 14.483;
1081   dm[1]= 23.3345;
1082   dm[2]= 0.5;
1083   dm[3]= 25.1;
1084
1085   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
1086
1087   //
1088
1089   dm[0] -= 1.218511934;
1090   dm[1] -= 1.218511934;
1091   dm[2] = 0.35;
1092
1093   gMC->Gsvolu("TIC3","TRD1",idtmed[2],dm,4);
1094
1095   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
1096
1097   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
1098
1099
1100   //----------------------------------------------
1101   // Tpc Readout Chambers Empty spaces - for both
1102   // inner and outer sectors
1103   //----------------------------------------------
1104
1105   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
1106
1107   // Inner sector - 4 spaces
1108
1109
1110   dm[3] = 4.7625;
1111   dm[0] = 12.472;
1112
1113   Float_t rr = 90.52;
1114   Float_t zz;
1115
1116   zz= -12.7875;
1117
1118   space = rr*tanAlpha-dm[0];
1119
1120   for(Int_t nsLow=0;nsLow<4;nsLow++){
1121
1122     rr += 9.525;
1123     dm[1]= rr*tanAlpha - space;
1124
1125     dm[2]=0.8;
1126
1127     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
1128
1129     //
1130
1131     dm[2]= 1.2;
1132
1133     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
1134
1135     rr += 0.4;
1136     dm[0] = rr*tanAlpha - space;
1137     zz += (0.4+9.525);
1138
1139   }
1140
1141   dm[0]= 12.472;
1142   // dm[1] - this is the dm[1] from the previous TRCE
1143   dm[2]= 1.05;
1144   dm[3]= 19.65;
1145
1146   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.,0.,0,"ONLY",dm,4);
1147
1148   //
1149   // TPc Space for Connectors
1150   //
1151
1152   dm[0]= .3;
1153   dm[1]= .3;
1154   dm[2]= 4.5;
1155
1156   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
1157
1158   // TPC Connectors
1159
1160   dm[0]= .25;
1161   dm[1]= .15;
1162   dm[2]= 3.75;
1163
1164   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3);
1165
1166   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1167
1168   zz = -12.7875;
1169
1170
1171   Float_t alpha;
1172   Float_t astep;
1173
1174   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
1175
1176   // inner part of the inner sector - 2 x 20 holes
1177
1178   astep = 20.00096874/19.;
1179
1180   alpha = 10.00048437-astep;
1181
1182   Float_t x1,x2;
1183
1184     x1 = 13.31175725;
1185     x1 -= 0.996357832;
1186
1187     x2 = 15.06180253;
1188     x2 -= 1.163028812;
1189
1190   Int_t ncon;
1191
1192   for(ncon=0;ncon<20;ncon++){
1193
1194     phi1 = 0.;
1195     theta1 = 90.+alpha;
1196     phi2=90.;
1197     theta2 = 90.;
1198     phi3 = (alpha>0) ? 0. : 180.;
1199     theta3 = TMath::Abs(alpha);
1200
1201     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1202
1203
1204
1205     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1206     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1207
1208
1209     x1 -= 1.296357833;
1210     x2 -= 1.463028812;
1211
1212     alpha -= astep;
1213     nRotMat++;
1214
1215   }
1216
1217   // outer part of the inner sector - 2 x 25 holes
1218
1219    astep = 20.00096874/24.;
1220    alpha = 10.00048437-astep;
1221
1222    x1 = 16.81184781;
1223    x1 -= 1.016295986;
1224
1225    x2 = 18.5618931;
1226    x2 -= 1.150914854;
1227
1228   for(ncon=0;ncon<25;ncon++){
1229
1230     phi1 = 0.;
1231     theta1 = 90.+alpha;
1232     phi2=90.;
1233     theta2 = 90.;
1234     phi3 = (alpha>0) ? 0. : 180.;
1235     theta3 = TMath::Abs(alpha);
1236
1237     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1238
1239
1240
1241     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1242     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1243
1244
1245     x1 -= 1.316295986;
1246     x2 -= 1.450914854;
1247
1248     alpha -= astep;
1249     nRotMat++;
1250
1251   }
1252
1253   //--------------------------------------------------------------------------
1254   //  TPC Outer Readout Chambers
1255   //  this is NOT a final design
1256   //--------------------------------------------------------------------------
1257
1258   dm[0]= 23.3875;
1259   dm[1]= 43.524;
1260   dm[2]= 1.5; //thickness
1261   dm[3]= 57.1;
1262
1263   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1264
1265   //------------------------------------------------
1266   // Tpc Outerr readout chamber Pad Plane
1267   //------------------------------------------------
1268
1269   dm[2]= 0.5;
1270
1271   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1272
1273   dm[0] -= 1.218511934;
1274   dm[1] -= 1.218511934;
1275   dm[2] = 0.35;
1276
1277   gMC->Gsvolu("TOC3","TRD1",idtmed[2],dm,4);
1278
1279   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1280
1281   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1282
1283   // empty space
1284
1285
1286   dm[0]= 21.035;
1287   dm[1]= 38.7205;
1288   dm[2]= 0.7;
1289   dm[3]= 50.15;
1290
1291   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);
1292
1293   dm[0]= 22.2935;
1294   dm[1]= 40.5085;
1295   dm[2]= 2.25;
1296   dm[3]= 51.65;
1297
1298   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1299
1300
1301   dm[0]= 21.35;
1302   dm[1]= 38.7205;
1303   dm[2]= 2.25;
1304   dm[3]= 50.15;
1305
1306   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1307
1308
1309   //-----------------------------------------------
1310   // Tpc Services Support Wheel
1311   //-----------------------------------------------
1312
1313   dm[0]=0.;
1314   dm[1]=360.;
1315   dm[2]=18.;
1316   dm[3]=2.;
1317
1318   dm[4]= -5.;
1319   dm[5]= 77.017;
1320   dm[6]= 255.267;
1321
1322   dm[7]= 5.;
1323   dm[8]= dm[5];
1324   dm[9]= dm[6];
1325
1326   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1327
1328   // Tpc Services Wheel Cover
1329
1330   dm[4]= -0.5;
1331   dm[7]= 0.5;
1332
1333   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1334
1335   // Tpc Service wheel Cover Empty space
1336
1337   dm[0]= 10.99;
1338   dm[1]= 39.599;
1339   dm[2]= .5;
1340   dm[3]= 81.125;
1341
1342   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1343
1344   // Tpc services Wheel Empty Spaces
1345
1346   dm[0]= 13.18017507;
1347   dm[1]= 44.61045938;
1348   dm[2]= 4.;
1349   dm[3]= 89.125;
1350
1351   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1352
1353   // Tpc Services Wheel Bars
1354
1355   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1356
1357   // bars-> TWES
1358
1359   dm[2]= 4.;
1360   dm[3]= .4;
1361
1362   dm[0]= 13.8149522;
1363   dm[1]= 13.95601379;
1364
1365   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1366
1367   dm[0]= 43.83462067;
1368   dm[1]= 43.97568225;
1369
1370   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1371
1372   // TPc ELectronics - right now 30% X0 Si
1373
1374   dm[0]= 14.03813696;
1375   dm[1]= 43.3524075;
1376   dm[2]= 1.404;
1377   dm[3]= 83.125;
1378
1379   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1380   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1381
1382
1383   //--------------------------------------------------------------------------
1384   //  End caps
1385   //--------------------------------------------------------------------------
1386
1387   // TPc Main Wheel - Al
1388
1389   dm[0]= 75.3;
1390   dm[1]= 264.8;
1391   dm[2]= 3.0;
1392
1393   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1394
1395   // TPc Extra Wheel (to avoid overlapping) - Al
1396
1397   dm[0]= 264.8;
1398   dm[1]= 277.0;
1399   dm[2]= 1.95;
1400
1401   gMC->Gsvolu("TPEW","TUBE",idtmed[4],dm,3);
1402
1403   //--------------------------------------------------------------------------
1404   //  Tpc Empty Space for the Readout chambers
1405   //--------------------------------------------------------------------------
1406
1407   Float_t rLow= 86.2;
1408   Float_t rUp= 243.5;
1409   Float_t dR = 0.5*(rUp-rLow);
1410
1411   space= 1.4/cosAlpha; // wheel ribs are 2.8 cm wide
1412
1413   dm[0]= rLow*tanAlpha-space;
1414   dm[1]= rUp*tanAlpha-space;
1415   dm[2]= 3.0;
1416   dm[3]= dR;
1417
1418   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1419
1420   // TIC1->TESR
1421
1422
1423   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1424
1425
1426   // TOC1->TESR
1427
1428   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1429
1430   // Tpc Empty Space Bars - Al (daughters of TESR)
1431
1432   Float_t zBar;
1433
1434   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1435
1436   // lower bar
1437
1438   dm[0]= rLow*tanAlpha-space;
1439   dm[1]= 88.7*tanAlpha-space;
1440   dm[2]= 0.95;
1441   dm[3]= 1.275;
1442
1443   zBar = -dR+dm[3];
1444
1445   gMC->Gsposp("TESB",1,"TESR",0.,2.05,zBar,0,"ONLY",dm,4);
1446
1447   // middle bar
1448
1449   dm[0]= 131.65*tanAlpha-space;
1450   dm[1]= 136.5*tanAlpha-space;
1451   dm[3]= 2.425;
1452
1453   zBar = -dR +131.65+dm[3]-rLow;
1454
1455   gMC->Gsposp("TESB",2,"TESR",0.,2.05,zBar,0,"ONLY",dm,4);
1456
1457   // upper bar
1458
1459   dm[0]= 240.4*tanAlpha-space;
1460   dm[1]= rUp*tanAlpha-space;
1461   dm[3]= 1.55;
1462
1463   zBar = dR-dm[3];
1464
1465   gMC->Gsposp("TESB",3,"TESR",0.,2.05,zBar,0,"ONLY",dm,4);
1466
1467   //  positioning of the empty spaces into the main wheel
1468
1469   Float_t rCenter,xc,yc;
1470   Float_t rInner,rOuter; // center of the inner and outer chamber
1471
1472   rCenter = rLow+dR;
1473
1474   rInner = 108.07;
1475   rOuter = 190.68;
1476
1477   for(Int_t ns=0; ns<nInnerSector;ns++){
1478
1479     phi1 = ns * innerOpenAngle + innerAngleShift;
1480     phi1 *= kRaddeg; // in degrees
1481
1482     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1483
1484     if (phi1 > 360.) phi1 -= 360.;
1485
1486     theta1 = 90.;
1487     phi2   = 90.;
1488     theta2 = 180.;
1489     phi3   = ns * innerOpenAngle + innerAngleShift;
1490     phi3 *= kRaddeg; // in degrees
1491
1492     phi3 = (Float_t)TMath::Nint(phi3);
1493
1494     if(phi3 > 360.) phi3 -= 360.;
1495
1496     theta3 = 90.;
1497
1498     // "holes"->End plate
1499
1500     xc = rCenter*TMath::Cos(phi3*kDegrad);
1501     yc = rCenter*TMath::Sin(phi3*kDegrad);
1502
1503     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1504
1505     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1506
1507     // TSCE->TSWC (services wheel volumes)
1508
1509     xc = 166.142*TMath::Cos(phi3*kDegrad);
1510     yc = 166.142*TMath::Sin(phi3*kDegrad);
1511
1512     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1513     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1514
1515
1516     // readout chambers->TDGS (drift gas)
1517
1518     xc = rInner*TMath::Cos(phi3*kDegrad);
1519     yc = rInner*TMath::Sin(phi3*kDegrad);
1520
1521     gMC->Gspos("TIRC",ns+1,"TDGS",xc,yc,252.,idrotm[nRotMat],"ONLY");
1522
1523     xc = rOuter*TMath::Cos(phi3*kDegrad);
1524     yc = rOuter*TMath::Sin(phi3*kDegrad);
1525
1526     gMC->Gspos("TORC",ns+1,"TDGS",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1527
1528     nRotMat++;
1529
1530     theta2 = 0.; // reflection
1531
1532     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1533
1534     xc = rInner*TMath::Cos(phi3*kDegrad);
1535     yc = rInner*TMath::Sin(phi3*kDegrad);
1536
1537     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGS",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1538
1539     xc = rOuter*TMath::Cos(phi3*kDegrad);
1540     yc = rOuter*TMath::Sin(phi3*kDegrad);
1541
1542     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGS",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1543
1544     nRotMat++;
1545
1546
1547   }
1548
1549
1550   // reflection matrix
1551
1552   theta1 = 90.;
1553   phi1   = 0.;
1554   theta2 = 90.;
1555   phi2   = 270.;
1556   theta3 = 180.;
1557   phi3   = 0.;
1558
1559   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1560
1561
1562   // TPMW->TPC
1563
1564   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1565   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[nRotMat],"ONLY");
1566   gMC->Gspos("TPEW",1,"TPC ",0.,0.,257.65,0,"ONLY");
1567   gMC->Gspos("TPEW",2,"TPC ",0.,0.,-257.65,0,"ONLY");
1568
1569
1570
1571   //-------------------------------------------------------
1572   // Tpc High Voltage Membrane - NOMEX honeycomb
1573   //-------------------------------------------------------
1574
1575   dm[0]=0.,
1576   dm[1]=360.;
1577   dm[2]=18.;
1578   dm[3]=2.;
1579
1580   //
1581
1582   dm[4]= -0.3;
1583   dm[5]= 81.156;
1584   dm[6]= 253.386;
1585
1586   //
1587
1588   dm[7]= 0.3;
1589   dm[8]= dm[5];
1590   dm[9]= dm[6];
1591
1592   gMC->Gsvolu("THVM","PGON",idtmed[6],dm,10);
1593
1594   gMC->Gspos("THVM",1,"TDGS",0.,0.,0.,0,"ONLY");
1595
1596   //----------------------------------------------------------
1597   // TPc Support Rods - MAKROLON
1598   //----------------------------------------------------------
1599
1600   dm[0]= 0.9;
1601   dm[1]= 1.2;
1602   dm[2]= 126.65;
1603
1604   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,3);
1605
1606   for(Int_t nrod=1;nrod<18;nrod++){
1607     Float_t angle=innerOpenAngle*(Float_t)nrod;
1608
1609     xc=82.4*TMath::Cos(angle);
1610     yc=82.4*TMath::Sin(angle);
1611
1612     gMC->Gspos("TPSR",nrod,"TDGS",xc,yc,126.95,0,"ONLY");
1613     gMC->Gspos("TPSR",nrod+17,"TDGS",xc,yc,-126.95,0,"ONLY");
1614
1615     xc=254.2*TMath::Cos(angle);
1616     yc=254.2*TMath::Sin(angle);
1617
1618     gMC->Gspos("TPSR",nrod+34,"TDGS",xc,yc,126.95,0,"ONLY");
1619     gMC->Gspos("TPSR",nrod+51,"TDGS",xc,yc,-126.95,0,"ONLY");
1620
1621   }
1622
1623   //----------------------------------------------------------
1624   // Tpc High Voltage rod - MAKROLON + Copper cable
1625   //----------------------------------------------------------
1626
1627   // rod with cable (Left)
1628
1629   dm[0]=0.;
1630   dm[1]=2.25;
1631   dm[2]=126.65;
1632
1633   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1634
1635   // HV cable
1636
1637   dm[0]=0.;
1638   dm[1]=0.3;
1639   dm[2]=126.65;
1640
1641   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);
1642
1643   // empty space
1644
1645   dm[0]=0.3;
1646   dm[1]=1.;
1647   dm[2]=126.65;
1648
1649   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1650
1651   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1652   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1653
1654   // rod without cable
1655
1656   dm[0]=1.8;
1657   dm[1]=2.25;
1658   dm[2]=126.65;
1659
1660   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1661
1662
1663
1664   gMC->Gspos("THVL",1,"TDGS",82.4,0.,-126.95,0,"ONLY");
1665   gMC->Gspos("THVL",2,"TDGS",254.2,0.,-126.95,0,"ONLY");
1666
1667   gMC->Gspos("THVR",1,"TDGS",82.4,0.,126.95,0,"ONLY");
1668   gMC->Gspos("THVR",2,"TDGS",254.2,0.,126.95,0,"ONLY");
1669
1670
1671
1672   gMC->Gspos("TDGS",1,"TPC ",0.,0.,0.,0,"ONLY");
1673
1674   // services wheel cover -> wheel
1675
1676
1677   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1678   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1679
1680
1681   // put the wheel into the TPC
1682
1683   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1684   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1685
1686   gMC->Gsord("TPMW",6);
1687   gMC->Gsord("TSSW",6);
1688   gMC->Gsord("TSWC",6);
1689
1690   // put the TPC into ALIC (main mother volume)
1691
1692   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1693
1694
1695 } // end of function
1696
1697 //_____________________________________________________________________________
1698 void AliTPCv3::DrawDetector()
1699 {
1700   //
1701   // Draw a shaded view of the Time Projection Chamber version 1
1702   //
1703
1704
1705   // Set everything unseen
1706   gMC->Gsatt("*", "seen", -1);
1707   //
1708   // Set ALIC mother transparent
1709   gMC->Gsatt("ALIC","SEEN",0);
1710   //
1711   // Set the volumes visible
1712   //
1713
1714   gMC->Gsatt("TPC ","SEEN",0);
1715   gMC->Gsatt("TOIN","SEEN",1);
1716   gMC->Gsatt("TOIN","COLO",7);
1717   gMC->Gsatt("TPCR","SEEN",0);
1718   gMC->Gsatt("TOCV","SEEN",1);
1719   gMC->Gsatt("TOCV","COLO",4);
1720   gMC->Gsatt("TSA1","SEEN",0);
1721   gMC->Gsatt("TSA2","SEEN",0);
1722   gMC->Gsatt("TSA3","SEEN",0);
1723   gMC->Gsatt("TSA4","SEEN",0);
1724   gMC->Gsatt("TOFC","SEEN",1);
1725   gMC->Gsatt("TOFC","COLO",4);
1726   gMC->Gsatt("TSA5","SEEN",0);
1727   gMC->Gsatt("TSA6","SEEN",0);
1728   gMC->Gsatt("TSA7","SEEN",0);
1729   gMC->Gsatt("TIIN","COLO",7);
1730   gMC->Gsatt("TIIN","SEEN",1);
1731   gMC->Gsatt("TICL","SEEN",0);
1732   gMC->Gsatt("TSA9","SEEN",0);
1733   gMC->Gsatt("TS10","SEEN",0);
1734   gMC->Gsatt("TS11","SEEN",0);
1735   gMC->Gsatt("TS12","SEEN",0);
1736   gMC->Gsatt("TICR","SEEN",0);
1737   gMC->Gsatt("TS13","SEEN",0);
1738   gMC->Gsatt("TS14","SEEN",0);
1739   gMC->Gsatt("TS15","SEEN",0);
1740   gMC->Gsatt("TS16","SEEN",0);
1741   gMC->Gsatt("TIFC","SEEN",1);
1742   gMC->Gsatt("TIFC","COLO",4);
1743   gMC->Gsatt("TS17","SEEN",0);
1744   gMC->Gsatt("TS18","SEEN",0);
1745   gMC->Gsatt("TS19","SEEN",0);
1746   gMC->Gsatt("TS21","SEEN",0);
1747   gMC->Gsatt("TS22","SEEN",0);
1748   gMC->Gsatt("TS23","SEEN",0);
1749   gMC->Gsatt("TS24","SEEN",0);
1750   gMC->Gsatt("TDGS","SEEN",0);
1751   gMC->Gsatt("TIRC","SEEN",0);
1752   gMC->Gsatt("TIC1","SEEN",1);
1753   gMC->Gsatt("TIPP","SEEN",0);
1754   gMC->Gsatt("TIC3","SEEN",0);
1755   gMC->Gsatt("TRCE","SEEN",0);
1756   gMC->Gsatt("TPSC","SEEN",0);
1757   gMC->Gsatt("TPCC","SEEN",0);
1758   gMC->Gsatt("TORC","SEEN",0);
1759   gMC->Gsatt("TOPP","SEEN",0);
1760   gMC->Gsatt("TOC3","SEEN",0);
1761   gMC->Gsatt("TOC1","SEEN",1);
1762   gMC->Gsatt("TSSW","SEEN",1);
1763   gMC->Gsatt("TSWC","SEEN",1);
1764   gMC->Gsatt("TSCE","SEEN",1);
1765   gMC->Gsatt("TSSW","COLO",3);
1766   gMC->Gsatt("TSWC","COLO",3);
1767   gMC->Gsatt("TSCE","COLO",6);
1768   gMC->Gsatt("TWES","SEEN",0);
1769   gMC->Gsatt("TSWB","SEEN",0);
1770   gMC->Gsatt("TPEL","SEEN",0);
1771   gMC->Gsatt("TPMW","SEEN",1);
1772   gMC->Gsatt("TPEW","SEEN",1);
1773   gMC->Gsatt("TESR","SEEN",1);
1774   gMC->Gsatt("TPMW","COLO",12);
1775   gMC->Gsatt("TPEW","COLO",12);
1776   gMC->Gsatt("TWES","COLO",5);
1777   gMC->Gsatt("TIC1","COLO",5);
1778   gMC->Gsatt("TOC1","COLO",5);
1779   gMC->Gsatt("TESB","SEEN",0);
1780   gMC->Gsatt("TPLS","SEEN",0);
1781   gMC->Gsatt("TPUS","SEEN",0);
1782   gMC->Gsatt("TPSS","SEEN",0);
1783   gMC->Gsatt("THVM","SEEN",1);
1784   gMC->Gsatt("THVM","COLO",11);
1785   gMC->Gsatt("TPSR","SEEN",0);
1786   gMC->Gsatt("THVL","SEEN",0);
1787   gMC->Gsatt("THVC","SEEN",0);
1788   gMC->Gsatt("THVE","SEEN",0);
1789   gMC->Gsatt("THVR","SEEN",0);
1790
1791   //
1792   gMC->Gdopt("hide", "on");
1793   gMC->Gdopt("shad", "on");
1794   gMC->Gsatt("*", "fill", 7);
1795   gMC->SetClipBox(".");
1796   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1797   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1798   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1799   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1800   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1801   gMC->DefaultRange();
1802   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1803   gMC->Gdhead(1111, "Time Projection Chamber");
1804   gMC->Gdman(18, 4, "MAN");
1805   gMC->Gdopt("hide","off");
1806 }
1807
1808 //_____________________________________________________________________________
1809 void AliTPCv3::CreateMaterials()
1810 {
1811   //
1812   // Define materials for version 2 of the Time Projection Chamber
1813   //
1814
1815
1816   //
1817   AliTPC::CreateMaterials();
1818 }
1819
1820 //_____________________________________________________________________________
1821 void AliTPCv3::Init()
1822 {
1823   //
1824   // Initialises version 3 of the TPC after that it has been built
1825   //
1826   Int_t *idtmed = fIdtmed->GetArray();
1827
1828   AliTPC::Init();
1829
1830   fIdSens=gMC->VolId("TDGS"); // drift gas as a sensitive volume
1831
1832   gMC->SetMaxNStep(30000); // max. number of steps increased
1833
1834   gMC->Gstpar(idtmed[2],"LOSS",5);
1835
1836   printf("*** TPC version 3 initialized ***\n");
1837   printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
1838
1839   //
1840
1841 }
1842
1843 //_____________________________________________________________________________
1844 void AliTPCv3::StepManager()
1845 {
1846   //
1847   // Called for every step in the Time Projection Chamber
1848   //
1849
1850   //
1851   // parameters used for the energy loss calculations
1852   //
1853   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1854   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1855   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1856
1857
1858   const Float_t kbig = 1.e10;
1859
1860   Int_t id,copy;
1861   TLorentzVector pos;
1862   Float_t hits[4];
1863   Int_t vol[2];
1864   TClonesArray &lhits = *fHits;
1865
1866   vol[1]=0;
1867   vol[0]=0;
1868
1869   //
1870
1871   gMC->SetMaxStep(kbig);
1872
1873   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1874
1875   Float_t charge = gMC->TrackCharge();
1876
1877   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1878
1879
1880   id=gMC->CurrentVolID(copy);
1881
1882   // Check the sensitive volume
1883
1884   if (id != fIdSens) return;
1885
1886   //
1887   //  charged particle is in the sensitive volume
1888   //
1889
1890   if(gMC->TrackStep() > 0) {
1891
1892
1893     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1894     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1895
1896     gMC->TrackPosition(pos);
1897     hits[0]=pos[0];
1898     hits[1]=pos[1];
1899     hits[2]=pos[2];
1900
1901     //
1902     // check the selected side of the TPC
1903     //
1904
1905     if(fSide && fSide*hits[2]<=0.) return;
1906
1907     hits[3]=(Float_t)nel;
1908
1909     // Add this hit
1910
1911     new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
1912
1913   }
1914
1915   // Stemax calculation for the next step
1916
1917   Float_t pp;
1918   TLorentzVector mom;
1919   gMC->TrackMomentum(mom);
1920   Float_t ptot=mom.Rho();
1921   Float_t betaGamma = ptot/gMC->TrackMass();
1922
1923   Int_t pid=gMC->TrackPid();
1924   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1925     {
1926       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1927     }
1928   else
1929     {
1930       pp=kprim*BetheBloch(betaGamma);
1931       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1932     }
1933
1934   Float_t random[1];
1935   gMC->Rndm(random,1); // good, old GRNDM from Geant3
1936
1937   Double_t rnd = (Double_t)random[0];
1938
1939   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1940
1941 }
1942
1943 //_____________________________________________________________________________
1944 Float_t AliTPCv3::BetheBloch(Float_t bg)
1945 {
1946   //
1947   // Bethe-Bloch energy loss formula
1948   //
1949   const Double_t kp1=0.76176e-1;
1950   const Double_t kp2=10.632;
1951   const Double_t kp3=0.13279e-4;
1952   const Double_t kp4=1.8631;
1953   const Double_t kp5=1.9479;
1954
1955   Double_t dbg = (Double_t) bg;
1956
1957   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1958
1959   Double_t aa = TMath::Power(beta,kp4);
1960   Double_t bb = TMath::Power(1./dbg,kp5);
1961
1962   bb=TMath::Log(kp3+bb);
1963
1964   return ((Float_t)((kp2-aa-bb)*kp1/aa));
1965 }