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 1.28  2001/06/12 07:07:41  kowal2
  19 New files for folder and stack
  20
  21 Revision 1.27  2001/05/08 16:03:06  kowal2
  22 Geometry update according to the latest technical spec.
  23
  24 Revision 1.26  2001/04/27 15:23:07  kowal2
  25 Correct materian in the central part of the inner containment vessel
  26
  27 Revision 1.25  2001/04/26 06:15:12  kowal2
  28 Corrected bug in the inner containment vessel (cones)
  29
  30 Revision 1.24  2001/04/24 11:22:01  kowal2
  31 Protection against too small betagamma
  32
  33 Revision 1.23  2001/04/24 11:17:33  kowal2
  34 New TPC geometry.
  35
  36 Revision 1.22  2001/03/13 13:07:34  kowal2
  37 Corrected bug in the TPC mother volume geometry.
  38 Thanks to A. Morsch
  39
  40 Revision 1.21  2000/11/30 11:48:50  kowal2
  41 TLorentzVector.h adde to satisfy the latest changes by Federico
  42
  43 Revision 1.20  2000/11/14 10:48:57  kowal2
  44 Correct material used for TSA4. Thanks to J. Barbosa.
  45
  46 Revision 1.19  2000/11/06 17:24:10  kowal2
  47 Corrected bug in the outer containment vessel and
  48 the outer field cage geometry.
  49 Thanks to J. Barbosa.
  50
  51 Revision 1.18  2000/11/02 16:55:24  kowal2
  52 Corrected bug in the inner containment vessel geometry.
  53 Thanks to J. Belikov
  54
  55 Revision 1.17  2000/11/02 07:24:11  kowal2
  56 Correction in the TPC geometry.
  57 Changes due to the new hit structure.
  58
  59 Revision 1.16  2000/10/02 21:28:18  fca
  60 Removal of useless dependecies via forward declarations
  61
  62 Revision 1.15  2000/07/10 20:57:39  hristov
  63 Update of TPC code and macros by M.Kowalski
  64
  65 Revision 1.14  2000/06/30 12:07:50  kowal2
  66 Updated from the TPC-PreRelease branch
  67
  68 Revision 1.13.2.4  2000/06/26 07:39:42  kowal2
  69 Changes to obey the coding rules
  70
  71 Revision 1.13.2.3  2000/06/25 08:38:41  kowal2
  72 Splitted from AliTPCtracking
  73
  74 Revision 1.13.2.2  2000/06/16 12:58:13  kowal2
  75 Changed parameter settings
  76
  77 Revision 1.13.2.1  2000/06/09 07:15:07  kowal2
  78
  79 Defaults loaded automatically (hard-wired)
  80 Optional parameters can be set via macro called in the constructor
  81
  82 Revision 1.13  2000/05/15 10:00:30  kowal2
  83 Corrected bug in the TPC geometry, thanks to Ivana Hrivnacova
  84
  85 Revision 1.12  2000/04/17 09:37:33  kowal2
  86 removed obsolete AliTPCDigitsDisplay.C
  87
  88 Revision 1.11.8.2  2000/04/10 08:36:12  kowal2
  89
  90 Updated readout chambers
  91 Some modifications to StepManager by M. Kowalski
  92
  93 Revision 1.11.8.1  2000/04/10 07:56:53  kowal2
  94 Not used anymore - removed
  95
  96 Revision 1.11  1999/11/04 17:28:07  fca
  97 Correct barrel part of HV Degrader
  98
  99 Revision 1.10  1999/10/14 16:52:08  fca
 100 Only use PDG codes and not GEANT ones
 101
 102 Revision 1.9  1999/10/08 06:27:23  fca
 103 Corrected bug in the HV degrader geometry, thanks to G.Tabary
 104
 105 Revision 1.8  1999/10/04 13:39:55  fca
 106 Correct array index problem
 107
 108 Revision 1.7  1999/09/29 09:24:34  fca
 109 Introduction of the Copyright and cvs Log
 110
 111 */
 112
 113 //
 114 ///////////////////////////////////////////////////////////////////////////////
 115 //                                                                           //
 116 //  Time Projection Chamber version 3 -- detailed TPC and slow simulation    //
 117 //
 118 //Begin_Html
 119 /*
 120 <img src="picts/AliTPCv3Class.gif">
 121 */
 122 //End_Html
 123 //                                                                           //
 124 //                                                                           //
 125 ///////////////////////////////////////////////////////////////////////////////
 126
 127 #include <stdlib.h>
 128 #include <TMath.h>
 129 #include "AliTPCv3.h"
 130 #include "AliRun.h"
 131 #include "AliMC.h"
 132 #include "AliConst.h"
 133 #include "AliTPCDigitsArray.h"
 134 #include"AliTPCParam.h"
 135 #include"AliTPCParamSR.h"
 136 #include "AliPDG.h"
 137 #include <TInterpreter.h>
 138 #include "TLorentzVector.h"
 139 #include "AliTPCTrackHitsV2.h"
 140
 141 ClassImp(AliTPCv3)
 142 //_____________________________________________________________________________
 143
 144   AliTPCv3::AliTPCv3(){
 145
 146   fHitType = 1;
 147
 148 }
 149
 150 //_____________________________________________________________________________
 151 AliTPCv3::AliTPCv3(const char *name, const char *title) :
 152   AliTPC(name, title)
 153 {
 154   //
 155   // Standard constructor for Time Projection Chamber version 3
 156   //
 157
 158   SetBufferSize(128000);
 159   fIdSens=0;
 160
 161   SetGasMixt(2,20,10,-1,0.9,0.1,0.);
 162
 163   if (fTPCParam)
 164      fTPCParam->Write(fTPCParam->GetTitle());
 165
 166   fHitType =1;
 167 }
 168
 169 //_____________________________________________________________________________
 170 void AliTPCv3::CreateGeometry()
 171 {
 172   //
 173   // Creation of the TPC coarse geometry (version 3)
 174   // The whole drift volume is sensitive
 175   // Origin Marek Kowalski Cracow
 176   //
 177   //Begin_Html
 178   /*
 179     <img src="picts/AliTPCgif">
 180   */
 181   //End_Html
 182   //Begin_Html
 183   /*
 184     <img src="picts/AliTPCv3Tree.gif">
 185   */
 186   //End_Html
 187   Float_t dm[50];
 188
 189   Int_t *idtmed = fIdtmed->GetArray(); // TPC media
 190
 191   Int_t idrotm[120]; // rotation matrices
 192
 193   Int_t nRotMat = 0; // actual number of rotation matrices
 194
 195
 196   //
 197   //  Mother volume (Air) - all volumes will be positioned in it
 198   //
 199
 200   dm[0]=0.;
 201   dm[1]=360.;
 202   dm[2]=8.;
 203
 204   //
 205
 206   dm[3]=-283.7;
 207   dm[4]=65.6;
 208   dm[5]=278.;
 209
 210   //
 211
 212   dm[6]=-253.6;
 213   dm[7]=65.6;
 214   dm[8]=278.;
 215
 216   //
 217
 218   dm[9]=-73.3;
 219   dm[10]=60.9;
 220   dm[11]=278.;
 221
 222   //
 223
 224   dm[12]=-73.3;
 225   dm[13]=56.9;
 226   dm[14]=278.;
 227
 228   //
 229
 230   dm[15]=73.3;
 231   dm[16]=56.9;
 232   dm[17]=278.;
 233
 234   //
 235
 236   dm[18]=73.3;
 237   dm[19]=60.9;
 238   dm[20]=278.;
 239
 240   //
 241
 242   dm[21]=253.6;
 243   dm[22]=65.6;
 244   dm[23]=278.;
 245
 246   //
 247
 248   dm[24]=283.7;
 249   dm[25]=65.6;
 250   dm[26]=278.;
 251
 252   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,27);
 253
 254   // outer part
 255
 256   //-------------------------------------------------------------------
 257   //   Tpc Outer INsulator (CO2) - contains cont. vessel and field cage
 258   //-------------------------------------------------------------------
 259
 260   dm[0]= 0.;
 261   dm[1]= 360.;
 262   dm[2]= 6.;
 263
 264   //
 265
 266   dm[3]=-253.6;
 267   dm[4]=258.;
 268   dm[5]=275.5;
 269
 270   //
 271
 272   dm[6]=-250.6;
 273   dm[7]=258.;
 274   dm[8]=275.5;
 275
 276   //
 277
 278   dm[9]=-250.6;
 279   dm[10]=258.;
 280   dm[11]=278.;
 281
 282   //
 283
 284   dm[12]=253.6;
 285   dm[13]=258.;
 286   dm[14]=278.;
 287
 288   //
 289
 290   dm[15]=253.6;
 291   dm[16]=264.8;
 292   dm[17]=278.;
 293
 294   //
 295
 296   dm[18]=256.6;
 297   dm[19]=264.8;
 298   dm[20]=278.;
 299
 300   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
 301
 302   //----------------------------------------------------------------
 303   // Tpc Outer Contaiment Vessel
 304   //  mother volume - Al, daughters - composite (sandwich)
 305   //----------------------------------------------------------------
 306
 307   dm[0]=0.;
 308   dm[1]=360.;
 309   dm[2]=6.;
 310
 311   //
 312
 313   dm[3]=-250.6;
 314   dm[4]=270.4;
 315   dm[5]=278.;
 316
 317   //
 318
 319   dm[6]=-247.6;
 320   dm[7]=270.4;
 321   dm[8]=278.;
 322
 323   //
 324
 325   dm[9]=-247.6;
 326   dm[10]=274.8124;
 327   dm[11]=278.;
 328
 329   //
 330
 331   dm[12]=253.6;
 332   dm[13]=274.8124;
 333   dm[14]=278.;
 334
 335   //
 336
 337   dm[15]=253.6;
 338   dm[16]=264.8;
 339   dm[17]=278.;
 340
 341   //
 342
 343   dm[18]=256.6;
 344   dm[19]=264.8;
 345   dm[20]=278.;
 346
 347   gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,21);
 348
 349   // Daughter volumes - sandwich
 350
 351   // Tpc SAndwich 1 - Al
 352
 353   dm[0]=274.8124;
 354   dm[1]=278.;
 355   dm[2]=252.1;
 356
 357   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
 358
 359   // Tpc SAndwich 2 - epoxy glue (I use Lexan)
 360
 361   dm[0] += 5.e-3;
 362   dm[1] -= 5.e-3;
 363
 364   gMC->Gsvolu("TSA2","TUBE",idtmed[14],dm,3);
 365
 366   // Tpc SAndwich 3 - Tedlar
 367
 368   dm[0] += 0.01;
 369   dm[1] -= 0.01;
 370
 371   gMC->Gsvolu("TSA3","TUBE",idtmed[9],dm,3);
 372
 373
 374   // Tpc SAndwich 4 - fiber glass (G10)
 375
 376   dm[0] += 3.8e-3;
 377   dm[1] -= 3.8e-3;
 378
 379   gMC->Gsvolu("TSA4","TUBE",idtmed[12],dm,3);
 380
 381   // Tpc SAndwich 5 - NOMEX honeycomb
 382
 383   dm[0] += 0.075;
 384   dm[1] -= 0.075;
 385
 386   gMC->Gsvolu("TSA5","TUBE",idtmed[6],dm,3);
 387
 388   // 5->4->3->2->1->TCOV
 389
 390
 391   gMC->Gspos("TSA5",1,"TSA4",0.,0.,0.,0,"ONLY");
 392   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
 393   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
 394   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");
 395
 396   gMC->Gspos("TSA1",1,"TOCV",0.,0.,3.,0,"ONLY");
 397
 398   // TCOV-> TOIN
 399
 400   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
 401
 402   //-------------------------------------------------------
 403   //  Tpc Outer Field Cage
 404   //  mother volume - Al, daughters - composite (sandwich)
 405   //-------------------------------------------------------
 406
 407   dm[0]=0.;
 408   dm[1]=360.;
 409   dm[2]=6.;
 410
 411   //
 412
 413   dm[3]=-253.6;
 414   dm[4]=258.;
 415   dm[5]=275.5;
 416
 417   //
 418
 419   dm[6]=-250.6;
 420   dm[7]=258.;
 421   dm[8]=275.5;
 422
 423   //
 424
 425   dm[9]=-250.6;
 426   dm[10]=258.;
 427   dm[11]=260.0476;
 428
 429   //
 430
 431   dm[12]=250.6;
 432   dm[13]=258.;
 433   dm[14]=260.0476;
 434
 435   //
 436
 437   dm[15]=250.6;
 438   dm[16]=258.;
 439   dm[17]=275.5;
 440
 441   //
 442
 443   dm[18]=253.6;
 444   dm[19]=258.;
 445   dm[20]=275.5;
 446
 447   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
 448
 449   // Daughter volumes
 450
 451   // Tpc SAndwich 6 - Tedlar
 452
 453   dm[0]= 258.;
 454   dm[1]= 260.0476;
 455   dm[2]= 252.1;
 456
 457   gMC->Gsvolu("TSA6","TUBE",idtmed[9],dm,3);
 458
 459   // Tpc SAndwich 7 - fiber glass
 460
 461   dm[0] += 3.8e-3;
 462   dm[1] -= 3.8e-3;
 463
 464   gMC->Gsvolu("TSA7","TUBE",idtmed[12],dm,3);
 465
 466
 467   // Tpc SAndwich 8 - NOMEX
 468
 469   dm[0] += 0.02;
 470   dm[1] -= 0.02;
 471
 472   gMC->Gsvolu("TSA8","TUBE",idtmed[6],dm,3);
 473
 474   // 8->7->6->TOFC
 475
 476   gMC->Gspos("TSA8",1,"TSA7",0.,0.,0.,0,"ONLY");
 477   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY");
 478   gMC->Gspos("TSA6",1,"TOFC",0.,0.,0.,0,"ONLY");
 479
 480   // TOFC->TOIN
 481
 482   gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
 483
 484   // TOIN->TPC
 485
 486   gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 487
 488   // inner part
 489
 490   //--------------------------------------------------------------------
 491   // Tpc Inner INsulator (CO2) - inner f.c. will be placed there
 492   // Inner containment vessel will be placed directly in the TPC
 493   //--------------------------------------------------------------------
 494
 495   dm[0]=0.;
 496   dm[1]=360.;
 497   dm[2]=4.;
 498
 499   //
 500
 501   dm[3]=-253.6;
 502   dm[4]=65.9;
 503   dm[5]=79.2;
 504
 505   //
 506
 507   dm[6]=-73.3;
 508   dm[7]=61.2;
 509   dm[8]=79.2;
 510
 511   //
 512
 513   dm[9]=73.3;
 514   dm[10]=61.2;
 515   dm[11]=79.2;
 516
 517   //
 518
 519   dm[12]=253.6;
 520   dm[13]=65.9;
 521   dm[14]=79.2;
 522
 523   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,15);
 524
 525   // the middle part of the F.C. is thinner - carve out the strip - Ne-CO2
 526
 527   dm[0]=79.16;
 528   dm[1]=79.2;
 529   dm[2]=88.;
 530
 531   gMC->Gsvolu("TII1","TUBE",idtmed[1],dm,3);
 532
 533   gMC->Gspos("TII1",1,"TIIN",0.,0.,0.,0,"ONLY");
 534
 535   //-----------------------------------------------------
 536   // Tpc Inner Field Cage
 537   // mother volume - Al, daughters - composite (sandwich)
 538   //------------------------------------------------------
 539
 540   dm[0]=0.;
 541   dm[1]=360.;
 542   dm[2]=10.;
 543
 544   //
 545
 546   dm[3]=-253.6;
 547   dm[4]=70.3;
 548   dm[5]=79.2;
 549
 550   //
 551
 552   dm[6]=-250.6;
 553   dm[7]=70.3;
 554   dm[8]=79.2;
 555
 556   //
 557
 558   dm[9]=-250.6;
 559   dm[10]=77.0524;
 560   dm[11]=79.2;
 561
 562   //
 563
 564   dm[12]=-88.;
 565   dm[13]=77.0524;
 566   dm[14]=79.2;
 567
 568   //
 569
 570   dm[15]=-88.;
 571   dm[16]=77.0924;
 572   dm[17]=79.16;
 573
 574   //
 575
 576   dm[18]=88.;
 577   dm[19]=77.0924;
 578   dm[20]=79.16;
 579
 580   //
 581
 582   dm[21]=88.;
 583   dm[22]=77.0524;
 584   dm[23]=79.2;
 585
 586   //
 587
 588   dm[24]=250.6;
 589   dm[25]=77.0524;
 590   dm[26]=79.2;
 591
 592   //
 593
 594   dm[27]=250.6;
 595   dm[28]=70.3;
 596   dm[29]=79.2;
 597
 598   //
 599
 600   dm[30]=253.6;
 601   dm[31]=70.3;
 602   dm[32]=79.2;
 603
 604   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,33);
 605
 606   // daughter volumes - central part
 607
 608   // Tpc Sandwich 9 -Tedlar
 609
 610   dm[0]=77.0924;
 611   dm[1]=79.16;
 612   dm[2]=88.;
 613
 614   gMC->Gsvolu("TSA9","TUBE",idtmed[9],dm,3);
 615
 616   // Tpc Sandwich 10 - fiber glass (G10)
 617
 618   dm[0] += 3.8e-3;
 619   dm[1] -= 3.8e-3;
 620
 621   gMC->Gsvolu("TS10","TUBE",idtmed[12],dm,3);
 622
 623   // Tpc Sandwich 11 - NOMEX
 624
 625   dm[0] += 0.03;
 626   dm[1] -= 0.03;
 627
 628   gMC->Gsvolu("TS11","TUBE",idtmed[6],dm,3);
 629
 630   // 11->10->9->TIFC
 631
 632   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
 633   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
 634
 635   gMC->Gspos("TSA9",1,"TIFC",0.,0.,0.,0,"ONLY");
 636
 637   // daughter volumes - outer parts (reinforced)
 638
 639   // Tpc Sandwich 12 -Tedlar
 640
 641   dm[0]=77.0524;
 642   dm[1]=79.2;
 643   dm[2]=82.05;
 644
 645   gMC->Gsvolu("TS12","TUBE",idtmed[9],dm,3);
 646
 647   // Tpc Sandwich 13 - fiber glass (G10)
 648
 649   dm[0] += 3.8e-3;
 650   dm[1] -= 3.8e-3;
 651
 652   gMC->Gsvolu("TS13","TUBE",idtmed[12],dm,3);
 653
 654   // Tpc Sandwich 14 - NOMEX
 655
 656   dm[0] += 0.07;
 657   dm[1] -= 0.07;
 658
 659   gMC->Gsvolu("TS14","TUBE",idtmed[6],dm,3);
 660
 661   // 14->13->12->TIFC
 662
 663   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
 664   gMC->Gspos("TS13",1,"TS12",0.,0.,0.,0,"ONLY");
 665
 666   gMC->Gspos("TS12",1,"TIFC",0.,0.,170.05,0,"ONLY");
 667   gMC->Gspos("TS12",2,"TIFC",0.,0.,-170.05,0,"ONLY");
 668
 669   // place this inside the inner insulator
 670
 671   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
 672
 673   // and now in the TPC...
 674
 675   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 676
 677   //---------------------------------------------------------
 678   // Tpc Inner Containment vessel - Cones
 679   //---------------------------------------------------------
 680
 681   dm[0]=0.;
 682   dm[1]=360.;
 683   dm[2]=8.;
 684
 685   //
 686
 687   dm[3]=71.8;
 688   dm[4]=56.9;
 689   dm[5]=59.4;
 690
 691   //
 692
 693   dm[6]=73.;
 694   dm[7]=56.9;
 695   dm[8]=59.4;
 696
 697   //
 698
 699   dm[9]=73.;
 700   dm[10]=56.9;
 701   dm[11]=61.2;
 702
 703   //
 704
 705   dm[12]=73.3;
 706   dm[13]=56.9;
 707   dm[14]=61.2;
 708
 709   //
 710
 711   dm[15]=73.3;
 712   dm[16]=60.9;
 713   dm[17]=61.2;
 714
 715   //
 716
 717   dm[18]=253.6;
 718   dm[19]=65.6;
 719   dm[20]=65.9;
 720
 721   //
 722
 723   dm[21]=253.6;
 724   dm[22]=65.6;
 725   dm[23]=74.6;
 726
 727   //
 728
 729   dm[24]=256.6;
 730   dm[25]=65.6;
 731   dm[26]=74.6;
 732
 733   gMC->Gsvolu("TICC","PCON",idtmed[4],dm,27);
 734
 735   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
 736
 737   // reflection matrix
 738
 739   theta1 = 90.;
 740   phi1   = 0.;
 741   theta2 = 90.;
 742   phi2   = 270.;
 743   theta3 = 180.;
 744   phi3   = 0.;
 745
 746   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 747
 748   gMC->Gspos("TICC",1,"TPC ",0.,0.,0.,0,"ONLY");
 749   gMC->Gspos("TICC",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 750
 751
 752   //---------------------------------------------------------
 753   // Tpc Inner Containment vessel - Middle part -Al
 754   //---------------------------------------------------------
 755
 756   dm[0]=0.;
 757   dm[1]=360.;
 758   dm[2]=6.;
 759
 760   //
 761
 762   dm[3]=-71.6;
 763   dm[4]=60.2;
 764   dm[5]=61.2;
 765
 766   //
 767
 768   dm[6]=-69.1;
 769   dm[7]=60.2;
 770   dm[8]=61.2;
 771
 772   //
 773
 774   dm[9]=-69.1;
 775   dm[10]=60.6224;
 776   dm[11]=61.2;
 777
 778   //
 779
 780   dm[12]=69.1;
 781   dm[13]=60.6224;
 782   dm[14]=61.2;
 783
 784   //
 785
 786   dm[15]=69.1;
 787   dm[16]=60.2;
 788   dm[17]=61.2;
 789
 790   //
 791
 792   dm[18]=71.6;
 793   dm[19]=60.2;
 794   dm[20]=61.2;
 795
 796   gMC->Gsvolu("TICM","PCON",idtmed[4],dm,21);
 797
 798   // Tpc Sandwich 15 - Al
 799
 800   dm[0]=60.6224;
 801   dm[1]=61.2;
 802   dm[2]=70.1;
 803
 804   gMC->Gsvolu("TS15","TUBE",idtmed[4],dm,3);
 805
 806   // Tpc Sandwich 16 -  epoxy glue
 807
 808   dm[0] += 5.e-3;
 809   dm[1] -= 5.e-3;
 810
 811   gMC->Gsvolu("TS16","TUBE",idtmed[14],dm,3);
 812
 813   // Tpc Sandwich 17 - Tedlar
 814
 815   dm[0] += 0.01;
 816   dm[1] -= 0.01;
 817
 818   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
 819
 820   // Tpc Sandwich 18 - carbon fiber
 821
 822   dm[0] += 3.8e-3;
 823   dm[1] -= 3.8e-3;
 824
 825   gMC->Gsvolu("TS18","TUBE",idtmed[15],dm,3);
 826
 827   // Tpc Sandwich 19 - Nomex
 828
 829   dm[0] += 0.02;
 830   dm[1] -= 0.02;
 831
 832   gMC->Gsvolu("TS19","TUBE",idtmed[6],dm,3);
 833
 834   // 19->18->17->16->15-> TICM
 835
 836   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY");
 837   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
 838   gMC->Gspos("TS17",1,"TS16",0.,0.,0.,0,"ONLY");
 839   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
 840
 841   gMC->Gspos("TS15",1,"TICM ",0.,0.,0.,0,"ONLY");
 842
 843
 844   // TPc inner cont. vessel Joints
 845
 846   dm[0]=60.2;
 847   dm[1]=61.2;
 848   dm[2]=0.5;
 849
 850   gMC->Gsvolu("TPJ1","TUBE",idtmed[4],dm,3);
 851
 852   gMC->Gspos("TPJ1",1,"TPC ",0.,0.,72.3,0,"ONLY");
 853   gMC->Gspos("TPJ1",2,"TPC ",0.,0.,-72.3,0,"ONLY");
 854
 855   //
 856
 857   dm[0]=0.;
 858   dm[1]=360.;
 859   dm[2]=4.;
 860
 861   //
 862
 863   dm[3]=70.8;
 864   dm[4]=58.4;
 865   dm[5]=60.1;
 866
 867   //
 868
 869   dm[6]=71.2;
 870   dm[7]=58.4;
 871   dm[8]=60.1;
 872
 873   //
 874
 875   dm[9]=71.2;
 876   dm[10]=58.4;
 877   dm[11]=59.4;
 878
 879   //
 880
 881   dm[12]=71.6;
 882   dm[13]=58.4;
 883   dm[14]=59.4;
 884
 885   gMC->Gsvolu("TPJ2","PCON",idtmed[4],dm,15);
 886
 887   gMC->Gspos("TPJ2",1,"TPC ",0.,0.,0.,0,"ONLY");
 888   gMC->Gspos("TPJ2",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 889
 890
 891
 892   // Tpc Inner Containment vessel Seal (Viton, I use Lexan for a time being)
 893
 894   dm[0]=58.4;
 895   dm[1]=61.2;
 896   dm[2]=0.1;
 897
 898   gMC->Gsvolu("TICS","TUBE",idtmed[14],dm,3);
 899
 900   gMC->Gspos("TICS",1,"TPC ",0.,0.,71.7,0,"ONLY");
 901   gMC->Gspos("TICS",2,"TPC ",0.,0.,-71.7,0,"ONLY");
 902
 903   // TICM -> TPC
 904
 905   gMC->Gspos("TICM",1,"TPC ",0.,0.,0.,0,"ONLY");
 906
 907   //
 908
 909   nRotMat++; // prepare for the next rotation matrix
 910
 911   //---------------------------------------------------------
 912   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
 913   //  and its daughters (HV membrane, rods, readout chambers)
 914   //---------------------------------------------------------
 915
 916   dm[0]= 79.2;
 917   dm[1]= 258.0;
 918   dm[2]= 253.6;
 919
 920   gMC->Gsvolu("TDGS","TUBE",idtmed[2],dm,3);
 921
 922   // sector opening angles
 923
 924   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
 925
 926   // sector angle shift
 927
 928   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
 929
 930   // number of sectors
 931
 932   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
 933   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
 934
 935   // All above parameters are identical for inner and outer
 936   // sectors. The distinction is kept for the historical reasons
 937   // and eventually will disappear.
 938
 939   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
 940   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
 941   Float_t space;
 942
 943   //-------------------------------------------------------------------------
 944   //   Tpc Inner Readout Chambers
 945   //-------------------------------------------------------------------------
 946
 947   dm[0]= 14.483;
 948   dm[1]= 23.3345;
 949   dm[2]= 1.6; // thickness
 950   dm[3]= 25.1;
 951
 952   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
 953
 954   // this volume will be positioned in the empty space
 955   // of the end-cap to avoid overlaps
 956
 957   dm[0]= 13.7305;
 958   dm[1]= 21.1895;
 959   dm[2]= 2.25;
 960   dm[3]= 21.15;
 961
 962   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
 963
 964
 965   //------------------------------------------------
 966   // Tpc Inner readout chamber Pad Plane
 967   //------------------------------------------------
 968
 969   dm[0]= 14.483;
 970   dm[1]= 23.3345;
 971   dm[2]= 0.5;
 972   dm[3]= 25.1;
 973
 974   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
 975
 976   //
 977
 978   dm[0] -= 1.218511934;
 979   dm[1] -= 1.218511934;
 980   dm[2] = 0.35;
 981
 982   gMC->Gsvolu("TIC3","TRD1",idtmed[1],dm,4);
 983
 984   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
 985
 986   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
 987
 988
 989   //----------------------------------------------
 990   // Tpc Readout Chambers Empty spaces - for both
 991   // inner and outer sectors
 992   //----------------------------------------------
 993
 994   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
 995
 996   // Inner sector - 4 spaces
 997
 998
 999   dm[3] = 4.7625;
1000   dm[0] = 12.472;
1001
1002   Float_t rr = 90.52;
1003   Float_t zz;
1004
1005   zz= -12.7875;
1006
1007   space = rr*tanAlpha-dm[0];
1008
1009   for(Int_t nsLow=0;nsLow<4;nsLow++){
1010
1011     rr += 9.525;
1012     dm[1]= rr*tanAlpha - space;
1013
1014     dm[2]=0.8;
1015
1016     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
1017
1018     //
1019
1020     dm[2] = 1.2;
1021
1022     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
1023
1024     rr += 0.4;
1025     dm[0] = rr*tanAlpha - space;
1026     zz += (0.4+9.525);
1027
1028   }
1029
1030   dm[0]= 12.472;
1031   // dm[1] - this is the dm[1] from the previous TRCE
1032   dm[2]= 1.05;
1033   dm[3]= 19.65;
1034
1035   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.2,0.,0,"ONLY",dm,4);
1036
1037   //
1038   // TPc Space for Connectors
1039   //
1040
1041   dm[0]= .3;
1042   dm[1]= .3;
1043   dm[2]= 4.5;
1044
1045   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
1046
1047   // TPC Connectors
1048
1049   dm[0]= .25;
1050   dm[1]= .15;
1051   dm[2]= 3.75;
1052
1053   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3);
1054
1055   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1056
1057   zz = -12.7875;
1058
1059
1060   Float_t alpha;
1061   Float_t astep;
1062
1063   // inner part of the inner sector - 2 x 20 holes
1064
1065   astep = 20.00096874/19.;
1066
1067   alpha = 10.00048437-astep;
1068
1069   Float_t x1,x2;
1070
1071     x1 = 13.31175725;
1072     x1 -= 0.996357832;
1073
1074     x2 = 15.06180253;
1075     x2 -= 1.163028812;
1076
1077   Int_t ncon;
1078
1079   for(ncon=0;ncon<20;ncon++){
1080
1081     phi1 = 0.;
1082     theta1 = 90.+alpha;
1083     phi2=90.;
1084     theta2 = 90.;
1085     phi3 = (alpha>0) ? 0. : 180.;
1086     theta3 = TMath::Abs(alpha);
1087
1088     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1089
1090
1091
1092     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1093     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1094
1095
1096     x1 -= 1.296357833;
1097     x2 -= 1.463028812;
1098
1099     alpha -= astep;
1100     nRotMat++;
1101
1102   }
1103
1104   // outer part of the inner sector - 2 x 25 holes
1105
1106    astep = 20.00096874/24.;
1107    alpha = 10.00048437-astep;
1108
1109    x1 = 16.81184781;
1110    x1 -= 1.016295986;
1111
1112    x2 = 18.5618931;
1113    x2 -= 1.150914854;
1114
1115   for(ncon=0;ncon<25;ncon++){
1116
1117     phi1 = 0.;
1118     theta1 = 90.+alpha;
1119     phi2=90.;
1120     theta2 = 90.;
1121     phi3 = (alpha>0) ? 0. : 180.;
1122     theta3 = TMath::Abs(alpha);
1123
1124     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1125
1126
1127
1128     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1129     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1130
1131
1132     x1 -= 1.316295986;
1133     x2 -= 1.450914854;
1134
1135     alpha -= astep;
1136     nRotMat++;
1137
1138   }
1139
1140   //--------------------------------------------------------------------------
1141   //  TPC Outer Readout Chambers
1142   //  this is NOT a final design
1143   //--------------------------------------------------------------------------
1144
1145   dm[0]= 23.3875;
1146   dm[1]= 43.524;
1147   dm[2]= 1.5; //thickness
1148   dm[3]= 57.1;
1149
1150   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1151
1152   //------------------------------------------------
1153   // Tpc Outer readout chamber Pad Plane
1154   //------------------------------------------------
1155
1156   dm[2]= 0.5;
1157
1158   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1159
1160   dm[0] -= 1.218511934;
1161   dm[1] -= 1.218511934;
1162   dm[2] = 0.35;
1163
1164   gMC->Gsvolu("TOC3","TRD1",idtmed[1],dm,4);
1165
1166   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1167
1168   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1169
1170   // empty space
1171
1172   dm[0]= 21.035;
1173   dm[1]= 38.7205;
1174   dm[2]= 0.7;
1175   dm[3]= 50.15;
1176
1177   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);
1178
1179   dm[0]= 22.2935;
1180   dm[1]= 40.5085;
1181   dm[2]= 2.25;
1182   dm[3]= 51.65;
1183
1184   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1185
1186   dm[0]= 21.35;
1187   dm[1]= 38.7205;
1188   dm[2]= 2.25;
1189   dm[3]= 50.15;
1190
1191   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1192
1193   //-----------------------------------------------
1194   // Tpc Services Support Wheel
1195   //-----------------------------------------------
1196
1197   dm[0]=0.;
1198   dm[1]=360.;
1199   dm[2]=18.;
1200   dm[3]=2.;
1201
1202   dm[4]= -5.;
1203   dm[5]= 77.017;
1204   dm[6]= 255.267;
1205
1206   dm[7]= 5.;
1207   dm[8]= dm[5];
1208   dm[9]= dm[6];
1209
1210   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1211
1212   // Tpc Services Wheel Cover
1213
1214   dm[4]= -0.5;
1215   dm[7]= 0.5;
1216
1217   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1218
1219   // Tpc Service wheel Cover Empty space
1220
1221   dm[0]= 10.99;
1222   dm[1]= 39.599;
1223   dm[2]= .5;
1224   dm[3]= 81.125;
1225
1226   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1227
1228   // Tpc services Wheel Empty Spaces
1229
1230   dm[0]= 13.18017507;
1231   dm[1]= 44.61045938;
1232   dm[2]= 4.;
1233   dm[3]= 89.125;
1234
1235   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1236
1237   // Tpc Services Wheel Bars
1238
1239   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1240
1241   // bars-> TWES
1242
1243   dm[2]= 4.;
1244   dm[3]= .4;
1245
1246   dm[0]= 13.8149522;
1247   dm[1]= 13.95601379;
1248
1249   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1250
1251   dm[0]= 43.83462067;
1252   dm[1]= 43.97568225;
1253
1254   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1255
1256   // TPc ELectronics - right now 30% X0 Si
1257
1258   dm[0]= 14.03813696;
1259   dm[1]= 43.3524075;
1260   dm[2]= 1.404;
1261   dm[3]= 83.125;
1262
1263   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1264   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1265
1266   //--------------------------------------------------------------------------
1267   //  End caps
1268   //--------------------------------------------------------------------------
1269
1270   // TPc Main Wheel - Al
1271
1272   dm[0]= 74.9;
1273   dm[1]= 264.4;
1274   dm[2]= 3.0;
1275
1276   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1277
1278   //--------------------------------------------------------------------------
1279   //  Tpc Empty Space for the Readout chambers
1280   //--------------------------------------------------------------------------
1281
1282   Float_t rLow= 86.2;
1283   Float_t rUp= 243.5;
1284   Float_t dR = 0.5*(rUp-rLow);
1285
1286   space= 1.5/cosAlpha; // wheel ribs are 3.0 cm wide
1287
1288   dm[0]= rLow*tanAlpha-space;
1289   dm[1]= rUp*tanAlpha-space;
1290   dm[2] = 3.0;
1291   dm[3]= dR;
1292
1293   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1294
1295   // TIC1->TESR
1296
1297   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1298
1299   // TOC1->TESR
1300
1301   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1302
1303   // Tpc Empty Space Bars - Al (daughters of TESR)
1304
1305   Float_t zBar;
1306
1307   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1308
1309   // lower bar
1310
1311   dm[0]= rLow*tanAlpha-space;
1312   dm[1]= 88.7*tanAlpha-space;
1313   dm[2]= 2.25;
1314   dm[3]= 1.275;
1315
1316   zBar = -dR+dm[3];
1317
1318   gMC->Gsposp("TESB",1,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1319
1320   // middle bar
1321
1322   dm[0]= 131.65*tanAlpha-space;
1323   dm[1]= 136.5*tanAlpha-space;
1324   dm[3]= 2.425;
1325
1326   zBar = -dR +131.65+dm[3]-rLow;
1327
1328   gMC->Gsposp("TESB",2,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1329
1330   // upper bar
1331
1332   dm[0]= 240.4*tanAlpha-space;
1333   dm[1]= rUp*tanAlpha-space;
1334   dm[3]= 1.55;
1335
1336   zBar = dR-dm[3];
1337
1338   gMC->Gsposp("TESB",3,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1339
1340   //  positioning of the empty spaces into the main wheel
1341
1342   Float_t rCenter,xc,yc;
1343   Float_t rInner,rOuter; // center of the inner and outer chamber
1344
1345   rCenter = rLow+dR;
1346
1347   rInner = 108.07;
1348   rOuter = 190.68;
1349
1350
1351   for(Int_t ns=0; ns<nInnerSector;ns++){
1352
1353     phi1 = ns * innerOpenAngle + innerAngleShift;
1354     phi1 *= kRaddeg; // in degrees
1355
1356     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1357
1358     if (phi1 > 360.) phi1 -= 360.;
1359
1360     theta1 = 90.;
1361     phi2   = 90.;
1362     theta2 = 180.;
1363     phi3   = ns * innerOpenAngle + innerAngleShift;
1364     phi3 *= kRaddeg; // in degrees
1365
1366     phi3 = (Float_t)TMath::Nint(phi3);
1367
1368     if(phi3 > 360.) phi3 -= 360.;
1369
1370     theta3 = 90.;
1371
1372     // "holes"->End plate
1373
1374     xc = rCenter*TMath::Cos(phi3*kDegrad);
1375     yc = rCenter*TMath::Sin(phi3*kDegrad);
1376
1377     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1378
1379     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1380
1381     // TSCE->TSWC (services wheel volumes)
1382
1383     xc = 166.142*TMath::Cos(phi3*kDegrad);
1384     yc = 166.142*TMath::Sin(phi3*kDegrad);
1385
1386     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1387     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1388
1389
1390     // readout chambers->TDGS (drift gas)
1391
1392     xc = rInner*TMath::Cos(phi3*kDegrad);
1393     yc = rInner*TMath::Sin(phi3*kDegrad);
1394
1395     gMC->Gspos("TIRC",ns+1,"TDGS",xc,yc,252.,idrotm[nRotMat],"ONLY");
1396
1397     xc = rOuter*TMath::Cos(phi3*kDegrad);
1398     yc = rOuter*TMath::Sin(phi3*kDegrad);
1399
1400     gMC->Gspos("TORC",ns+1,"TDGS",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1401
1402     nRotMat++;
1403
1404     theta2 = 0.; // reflection
1405
1406     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1407
1408     xc = rInner*TMath::Cos(phi3*kDegrad);
1409     yc = rInner*TMath::Sin(phi3*kDegrad);
1410
1411     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGS",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1412
1413     xc = rOuter*TMath::Cos(phi3*kDegrad);
1414     yc = rOuter*TMath::Sin(phi3*kDegrad);
1415
1416     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGS",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1417
1418     nRotMat++;
1419
1420   }
1421   // TPMW->TPC
1422
1423   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1424   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[0],"ONLY");
1425
1426   //---------------------------------------------------------
1427   //  Tpc High Voltage Membrane - 100 microns of mylar
1428   //---------------------------------------------------------
1429
1430   dm[0]=82.8;
1431   dm[1]=252.;
1432   dm[2]=0.005;
1433
1434   gMC->Gsvolu("THVM","TUBE",idtmed[8],dm,3);
1435
1436   gMC->Gspos("THVM",1,"TDGS",0.,0.,0.,0,"ONLY");
1437
1438   // Tpc High Voltage membrane Holders
1439
1440   gMC->Gsvolu("THVH","TUBE",idtmed[4],dm,0);
1441
1442
1443
1444   // inner
1445
1446   dm[0]=79.3;
1447   dm[1]=82.8;
1448   dm[2]=0.2;
1449
1450   gMC->Gsposp("THVH",1,"TDGS",0.,0.,0.,0,"ONLY",dm,3);
1451
1452   // outer
1453
1454   dm[0]= 252.;
1455   dm[1]= 257.9;
1456   dm[2]= 0.4;
1457
1458   gMC->Gsposp("THVH",2,"TDGS",0.,0.,0.,0,"ONLY",dm,3);
1459
1460   //----------------------------------------------------------
1461   // TPc Support Rods - MAKROLON
1462   //----------------------------------------------------------
1463
1464   dm[0]= 0.9;
1465   dm[1]= 1.2;
1466
1467   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,0); // inner and outer rods differ
1468
1469
1470   for(Int_t nrod=0;nrod<18;nrod++){
1471     Float_t angle=innerOpenAngle*(Float_t)nrod;
1472
1473     xc=81.5*TMath::Cos(angle);
1474     yc=81.5*TMath::Sin(angle);
1475
1476     dm[2]=126.7;
1477
1478     gMC->Gsposp("TPSR",nrod+1,"TDGS",xc,yc,126.9,0,"ONLY",dm,3);
1479     gMC->Gsposp("TPSR",nrod+19,"TDGS",xc,yc,-126.9,0,"ONLY",dm,3);
1480
1481     dm[2]=126.6;
1482
1483     xc=254.25*TMath::Cos(angle);
1484     yc=254.25*TMath::Sin(angle);
1485
1486     // rod number 54 contans the HV cable
1487
1488     if(nrod<17) {
1489       gMC->Gsposp("TPSR",nrod+37,"TDGS",xc,yc,127.,0,"ONLY",dm,3);
1490       gMC->Gsposp("TPSR",nrod+54,"TDGS",xc,yc,-127.,0,"ONLY",dm,3);
1491     }
1492
1493   }
1494
1495   //----------------------------------------------------------
1496   // Tpc High Voltage Rod - MAKROLON + Copper cable
1497   //----------------------------------------------------------
1498
1499   // rod with cable (Left)
1500
1501   dm[0]=0.;
1502   dm[1]=2.25;
1503   dm[2]=126.6;
1504
1505   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1506
1507   // HV cable
1508
1509   dm[0]=0.;
1510   dm[1]=0.3;
1511   dm[2]=126.6;
1512
1513   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);
1514
1515   // empty space
1516
1517   dm[0]=0.3;
1518   dm[1]=1.;
1519   dm[2]=126.6;
1520
1521   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1522
1523   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1524   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1525
1526   // rod without cable
1527
1528   dm[0]=1.8;
1529   dm[1]=2.25;
1530   dm[2]=126.6;
1531
1532   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1533
1534   gMC->Gspos("THVL",1,"TDGS",xc,yc,-127.,0,"ONLY");
1535   gMC->Gspos("THVR",1,"TDGS",xc,yc,127.,0,"ONLY");
1536
1537   gMC->Gspos("TDGS",1,"TPC ",0.,0.,0.,0,"ONLY");
1538
1539   // services wheel cover -> wheel
1540
1541
1542   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1543   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1544
1545
1546   // put the wheel into the TPC
1547
1548   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1549   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1550
1551   //
1552
1553   gMC->Gsord("TPMW",6);
1554   gMC->Gsord("TSSW",6);
1555   gMC->Gsord("TSWC",6);
1556
1557   // put the TPC into ALIC (main mother volume)
1558
1559   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1560
1561
1562 } // end of function
1563
1564 //_____________________________________________________________________________
1565 void AliTPCv3::DrawDetector()
1566 {
1567   //
1568   // Draw a shaded view of the Time Projection Chamber version 3
1569   //
1570
1571
1572   // Set everything unseen
1573   gMC->Gsatt("*", "seen", -1);
1574   //
1575   // Set ALIC mother transparent
1576   gMC->Gsatt("ALIC","SEEN",0);
1577   //
1578   // Set the volumes visible
1579   //
1580
1581   gMC->Gsatt("TPC ","SEEN",0);
1582   gMC->Gsatt("TOIN","SEEN",1);
1583   gMC->Gsatt("TOIN","COLO",7);
1584   gMC->Gsatt("TOCV","SEEN",1);
1585   gMC->Gsatt("TOCV","COLO",4);
1586   gMC->Gsatt("TSA1","SEEN",0);
1587   gMC->Gsatt("TSA2","SEEN",0);
1588   gMC->Gsatt("TSA3","SEEN",0);
1589   gMC->Gsatt("TSA4","SEEN",0);
1590   gMC->Gsatt("TSA5","SEEN",0);
1591   gMC->Gsatt("TOFC","SEEN",1);
1592   gMC->Gsatt("TOFC","COLO",4);
1593   gMC->Gsatt("TSA6","SEEN",0);
1594   gMC->Gsatt("TSA7","SEEN",0);
1595   gMC->Gsatt("TSA8","SEEN",0);
1596   gMC->Gsatt("TIIN","SEEN",1);
1597   gMC->Gsatt("TIIN","COLO",7);
1598   gMC->Gsatt("TII1","SEEN",0);
1599   gMC->Gsatt("TIFC","SEEN",1);
1600   gMC->Gsatt("TIFC","COLO",4);
1601   gMC->Gsatt("TSA9","SEEN",0);
1602   gMC->Gsatt("TS10","SEEN",0);
1603   gMC->Gsatt("TS11","SEEN",0);
1604   gMC->Gsatt("TS12","SEEN",0);
1605   gMC->Gsatt("TS13","SEEN",0);
1606   gMC->Gsatt("TS14","SEEN",0);
1607   gMC->Gsatt("TICC","SEEN",0);
1608   gMC->Gsatt("TICM","SEEN",0);
1609   gMC->Gsatt("TS15","SEEN",0);
1610   gMC->Gsatt("TS16","SEEN",0);
1611   gMC->Gsatt("TS17","SEEN",0);
1612   gMC->Gsatt("TS18","SEEN",0);
1613   gMC->Gsatt("TS19","SEEN",0);
1614   gMC->Gsatt("TPJ1","SEEN",0);
1615   gMC->Gsatt("TPJ2","SEEN",0);
1616   gMC->Gsatt("TICS","SEEN",0);
1617   gMC->Gsatt("TDGS","SEEN",0);
1618   gMC->Gsatt("TIRC","SEEN",0);
1619   gMC->Gsatt("TIC1","SEEN",1);
1620   gMC->Gsatt("TIPP","SEEN",0);
1621   gMC->Gsatt("TIC3","SEEN",0);
1622   gMC->Gsatt("TRCE","SEEN",0);
1623   gMC->Gsatt("TPSC","SEEN",0);
1624   gMC->Gsatt("TPCC","SEEN",0);
1625   gMC->Gsatt("TORC","SEEN",0);
1626   gMC->Gsatt("TOPP","SEEN",0);
1627   gMC->Gsatt("TOC3","SEEN",0);
1628   gMC->Gsatt("TOC1","SEEN",1);
1629   gMC->Gsatt("TSSW","SEEN",1);
1630   gMC->Gsatt("TSWC","SEEN",1);
1631   gMC->Gsatt("TSSW","COLO",3);
1632   gMC->Gsatt("TSWC","COLO",3);
1633   gMC->Gsatt("TSCE","COLO",6);
1634   gMC->Gsatt("TSCE","SEEN",1);
1635   gMC->Gsatt("TWES","SEEN",0);
1636   gMC->Gsatt("TSWB","SEEN",0);
1637   gMC->Gsatt("TPEL","SEEN",0);
1638   gMC->Gsatt("TPMW","SEEN",1);
1639   gMC->Gsatt("TESR","SEEN",1);
1640   gMC->Gsatt("TPMW","COLO",12);
1641   gMC->Gsatt("TIC1","COLO",5);
1642   gMC->Gsatt("TOC1","COLO",5);
1643   gMC->Gsatt("TESB","SEEN",0);
1644   gMC->Gsatt("THVM","SEEN",1);
1645   gMC->Gsatt("THVM","COLO",11);
1646   gMC->Gsatt("THVH","SEEN",0);
1647   gMC->Gsatt("TPSR","SEEN",0);
1648   gMC->Gsatt("THVL","SEEN",0);
1649   gMC->Gsatt("THVC","SEEN",0);
1650   gMC->Gsatt("THVE","SEEN",0);
1651   gMC->Gsatt("THVR","SEEN",0);
1652
1653   //
1654   gMC->Gdopt("hide", "on");
1655   gMC->Gdopt("shad", "on");
1656   gMC->Gsatt("*", "fill", 7);
1657   gMC->SetClipBox(".");
1658   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1659   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1660   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1661   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1662   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1663   gMC->DefaultRange();
1664   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1665   gMC->Gdhead(1111, "Time Projection Chamber");
1666   gMC->Gdman(18, 4, "MAN");
1667   gMC->Gdopt("hide","off");
1668 }
1669
1670 //_____________________________________________________________________________
1671 void AliTPCv3::CreateMaterials()
1672 {
1673   //
1674   // Define materials for version 2 of the Time Projection Chamber
1675   //
1676
1677
1678   //
1679   AliTPC::CreateMaterials();
1680 }
1681
1682 //_____________________________________________________________________________
1683 void AliTPCv3::Init()
1684 {
1685   //
1686   // Initialises version 3 of the TPC after that it has been built
1687   //
1688   Int_t *idtmed = fIdtmed->GetArray();
1689
1690   AliTPC::Init();
1691
1692   fIdSens=gMC->VolId("TDGS"); // drift gas as a sensitive volume
1693
1694   gMC->SetMaxNStep(30000); // max. number of steps increased
1695
1696   gMC->Gstpar(idtmed[2],"LOSS",5);
1697
1698   printf("%s: *** TPC version 3 initialized***\n",ClassName());
1699
1700   printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
1701
1702   // printf("*** TPC version 3 initialized ***\n");
1703   // printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
1704
1705   //
1706
1707 }
1708
1709 //_____________________________________________________________________________
1710 void AliTPCv3::StepManager()
1711 {
1712   //
1713   // Called for every step in the Time Projection Chamber
1714   //
1715
1716   //
1717   // parameters used for the energy loss calculations
1718   //
1719   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1720   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1721   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1722
1723
1724   const Float_t kbig = 1.e10;
1725
1726   Int_t id,copy;
1727   TLorentzVector pos;
1728   Float_t hits[4];
1729   Int_t vol[2];
1730
1731   vol[1]=0;
1732   vol[0]=0;
1733
1734   //
1735
1736   gMC->SetMaxStep(kbig);
1737
1738   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1739
1740   Float_t charge = gMC->TrackCharge();
1741
1742   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1743
1744
1745   id=gMC->CurrentVolID(copy);
1746
1747   // Check the sensitive volume
1748
1749   if (id != fIdSens) return;
1750
1751   //
1752   //  charged particle is in the sensitive volume
1753   //
1754
1755   if(gMC->TrackStep() > 0) {
1756
1757
1758     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1759     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1760
1761     gMC->TrackPosition(pos);
1762     hits[0]=pos[0];
1763     hits[1]=pos[1];
1764     hits[2]=pos[2];
1765
1766     //
1767     // check the selected side of the TPC
1768     //
1769
1770     if(fSide && fSide*hits[2]<=0.) return;
1771
1772     hits[3]=(Float_t)nel;
1773
1774     // Add this hit
1775
1776     AddHit(gAlice->CurrentTrack(), vol,hits);  //MI change
1777
1778   }
1779
1780   // Stemax calculation for the next step
1781
1782   Float_t pp;
1783   TLorentzVector mom;
1784   gMC->TrackMomentum(mom);
1785   Float_t ptot=mom.Rho();
1786   Float_t betaGamma = ptot/gMC->TrackMass();
1787
1788   Int_t pid=gMC->TrackPid();
1789   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1790     {
1791       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1792     }
1793   else
1794     {
1795       betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3);
1796       pp=kprim*BetheBloch(betaGamma);
1797       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1798     }
1799
1800   Float_t random[1];
1801   gMC->Rndm(random,1); // good, old GRNDM from Geant3
1802
1803   Double_t rnd = (Double_t)random[0];
1804
1805   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1806
1807 }
1808
1809 //_____________________________________________________________________________
1810 Float_t AliTPCv3::BetheBloch(Float_t bg)
1811 {
1812   //
1813   // Bethe-Bloch energy loss formula
1814   //
1815   const Double_t kp1=0.76176e-1;
1816   const Double_t kp2=10.632;
1817   const Double_t kp3=0.13279e-4;
1818   const Double_t kp4=1.8631;
1819   const Double_t kp5=1.9479;
1820
1821   Double_t dbg = (Double_t) bg;
1822
1823   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1824
1825   Double_t aa = TMath::Power(beta,kp4);
1826   Double_t bb = TMath::Power(1./dbg,kp5);
1827
1828   bb=TMath::Log(kp3+bb);
1829
1830   return ((Float_t)((kp2-aa-bb)*kp1/aa));
1831 }