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 1.29.6.2  2002/07/24 10:09:01  alibrary
  19 Updating VirtualMC
  20
  21 Revision 1.29  2002/01/21 17:12:00  kowal2
  22 New track hits structure using root containers
  23
  24 Revision 1.28  2001/06/12 07:07:41  kowal2
  25 New files for folder and stack
  26
  27 Revision 1.27  2001/05/08 16:03:06  kowal2
  28 Geometry update according to the latest technical spec.
  29
  30 Revision 1.26  2001/04/27 15:23:07  kowal2
  31 Correct materian in the central part of the inner containment vessel
  32
  33 Revision 1.25  2001/04/26 06:15:12  kowal2
  34 Corrected bug in the inner containment vessel (cones)
  35
  36 Revision 1.24  2001/04/24 11:22:01  kowal2
  37 Protection against too small betagamma
  38
  39 Revision 1.23  2001/04/24 11:17:33  kowal2
  40 New TPC geometry.
  41
  42 Revision 1.22  2001/03/13 13:07:34  kowal2
  43 Corrected bug in the TPC mother volume geometry.
  44 Thanks to A. Morsch
  45
  46 Revision 1.21  2000/11/30 11:48:50  kowal2
  47 TLorentzVector.h adde to satisfy the latest changes by Federico
  48
  49 Revision 1.20  2000/11/14 10:48:57  kowal2
  50 Correct material used for TSA4. Thanks to J. Barbosa.
  51
  52 Revision 1.19  2000/11/06 17:24:10  kowal2
  53 Corrected bug in the outer containment vessel and
  54 the outer field cage geometry.
  55 Thanks to J. Barbosa.
  56
  57 Revision 1.18  2000/11/02 16:55:24  kowal2
  58 Corrected bug in the inner containment vessel geometry.
  59 Thanks to J. Belikov
  60
  61 Revision 1.17  2000/11/02 07:24:11  kowal2
  62 Correction in the TPC geometry.
  63 Changes due to the new hit structure.
  64
  65 Revision 1.16  2000/10/02 21:28:18  fca
  66 Removal of useless dependecies via forward declarations
  67
  68 Revision 1.15  2000/07/10 20:57:39  hristov
  69 Update of TPC code and macros by M.Kowalski
  70
  71 Revision 1.14  2000/06/30 12:07:50  kowal2
  72 Updated from the TPC-PreRelease branch
  73
  74 Revision 1.13.2.4  2000/06/26 07:39:42  kowal2
  75 Changes to obey the coding rules
  76
  77 Revision 1.13.2.3  2000/06/25 08:38:41  kowal2
  78 Splitted from AliTPCtracking
  79
  80 Revision 1.13.2.2  2000/06/16 12:58:13  kowal2
  81 Changed parameter settings
  82
  83 Revision 1.13.2.1  2000/06/09 07:15:07  kowal2
  84
  85 Defaults loaded automatically (hard-wired)
  86 Optional parameters can be set via macro called in the constructor
  87
  88 Revision 1.13  2000/05/15 10:00:30  kowal2
  89 Corrected bug in the TPC geometry, thanks to Ivana Hrivnacova
  90
  91 Revision 1.12  2000/04/17 09:37:33  kowal2
  92 removed obsolete AliTPCDigitsDisplay.C
  93
  94 Revision 1.11.8.2  2000/04/10 08:36:12  kowal2
  95
  96 Updated readout chambers
  97 Some modifications to StepManager by M. Kowalski
  98
  99 Revision 1.11.8.1  2000/04/10 07:56:53  kowal2
 100 Not used anymore - removed
 101
 102 Revision 1.11  1999/11/04 17:28:07  fca
 103 Correct barrel part of HV Degrader
 104
 105 Revision 1.10  1999/10/14 16:52:08  fca
 106 Only use PDG codes and not GEANT ones
 107
 108 Revision 1.9  1999/10/08 06:27:23  fca
 109 Corrected bug in the HV degrader geometry, thanks to G.Tabary
 110
 111 Revision 1.8  1999/10/04 13:39:55  fca
 112 Correct array index problem
 113
 114 Revision 1.7  1999/09/29 09:24:34  fca
 115 Introduction of the Copyright and cvs Log
 116
 117 */
 118
 119 //
 120 ///////////////////////////////////////////////////////////////////////////////
 121 //                                                                           //
 122 //  Time Projection Chamber version 3 -- detailed TPC and slow simulation    //
 123 //
 124 //Begin_Html
 125 /*
 126 <img src="picts/AliTPCv3Class.gif">
 127 */
 128 //End_Html
 129 //                                                                           //
 130 //                                                                           //
 131 ///////////////////////////////////////////////////////////////////////////////
 132
 133 #include <stdlib.h>
 134 #include <TMath.h>
 135 #include "AliTPCv3.h"
 136 #include "AliRun.h"
 137 #include "AliMC.h"
 138 #include "AliConst.h"
 139 #include "AliTPCDigitsArray.h"
 140 #include"AliTPCParam.h"
 141 #include"AliTPCParamSR.h"
 142 #include "AliPDG.h"
 143 #include <TInterpreter.h>
 144 #include "TLorentzVector.h"
 145 #include "AliTPCTrackHitsV2.h"
 146
 147 ClassImp(AliTPCv3)
 148 //_____________________________________________________________________________
 149
 150   AliTPCv3::AliTPCv3(){
 151
 152   fHitType = 1;
 153
 154 }
 155
 156 //_____________________________________________________________________________
 157 AliTPCv3::AliTPCv3(const char *name, const char *title) :
 158   AliTPC(name, title)
 159 {
 160   //
 161   // Standard constructor for Time Projection Chamber version 3
 162   //
 163
 164   SetBufferSize(128000);
 165   fIdSens=0;
 166
 167   SetGasMixt(2,20,10,-1,0.9,0.1,0.);
 168
 169   if (fTPCParam)
 170      fTPCParam->Write(fTPCParam->GetTitle());
 171
 172   fHitType =1;
 173 }
 174
 175 //_____________________________________________________________________________
 176 void AliTPCv3::CreateGeometry()
 177 {
 178   //
 179   // Creation of the TPC coarse geometry (version 3)
 180   // The whole drift volume is sensitive
 181   // Origin Marek Kowalski Cracow
 182   //
 183   //Begin_Html
 184   /*
 185     <img src="picts/AliTPCgif">
 186   */
 187   //End_Html
 188   //Begin_Html
 189   /*
 190     <img src="picts/AliTPCv3Tree.gif">
 191   */
 192   //End_Html
 193   Float_t dm[50];
 194
 195   Int_t *idtmed = fIdtmed->GetArray(); // TPC media
 196
 197   Int_t idrotm[120]; // rotation matrices
 198
 199   Int_t nRotMat = 0; // actual number of rotation matrices
 200
 201
 202   //
 203   //  Mother volume (Air) - all volumes will be positioned in it
 204   //
 205
 206   dm[0]=0.;
 207   dm[1]=360.;
 208   dm[2]=8.;
 209
 210   //
 211
 212   dm[3]=-283.7;
 213   dm[4]=65.6;
 214   dm[5]=278.;
 215
 216   //
 217
 218   dm[6]=-253.6;
 219   dm[7]=65.6;
 220   dm[8]=278.;
 221
 222   //
 223
 224   dm[9]=-73.3;
 225   dm[10]=60.9;
 226   dm[11]=278.;
 227
 228   //
 229
 230   dm[12]=-73.3;
 231   dm[13]=56.9;
 232   dm[14]=278.;
 233
 234   //
 235
 236   dm[15]=73.3;
 237   dm[16]=56.9;
 238   dm[17]=278.;
 239
 240   //
 241
 242   dm[18]=73.3;
 243   dm[19]=60.9;
 244   dm[20]=278.;
 245
 246   //
 247
 248   dm[21]=253.6;
 249   dm[22]=65.6;
 250   dm[23]=278.;
 251
 252   //
 253
 254   dm[24]=283.7;
 255   dm[25]=65.6;
 256   dm[26]=278.;
 257
 258   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,27);
 259
 260   // outer part
 261
 262   //-------------------------------------------------------------------
 263   //   Tpc Outer INsulator (CO2) - contains cont. vessel and field cage
 264   //-------------------------------------------------------------------
 265
 266   dm[0]= 0.;
 267   dm[1]= 360.;
 268   dm[2]= 6.;
 269
 270   //
 271
 272   dm[3]=-253.6;
 273   dm[4]=258.;
 274   dm[5]=275.5;
 275
 276   //
 277
 278   dm[6]=-250.6;
 279   dm[7]=258.;
 280   dm[8]=275.5;
 281
 282   //
 283
 284   dm[9]=-250.6;
 285   dm[10]=258.;
 286   dm[11]=278.;
 287
 288   //
 289
 290   dm[12]=253.6;
 291   dm[13]=258.;
 292   dm[14]=278.;
 293
 294   //
 295
 296   dm[15]=253.6;
 297   dm[16]=264.8;
 298   dm[17]=278.;
 299
 300   //
 301
 302   dm[18]=256.6;
 303   dm[19]=264.8;
 304   dm[20]=278.;
 305
 306   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
 307
 308   //----------------------------------------------------------------
 309   // Tpc Outer Contaiment Vessel
 310   //  mother volume - Al, daughters - composite (sandwich)
 311   //----------------------------------------------------------------
 312
 313   dm[0]=0.;
 314   dm[1]=360.;
 315   dm[2]=6.;
 316
 317   //
 318
 319   dm[3]=-250.6;
 320   dm[4]=270.4;
 321   dm[5]=278.;
 322
 323   //
 324
 325   dm[6]=-247.6;
 326   dm[7]=270.4;
 327   dm[8]=278.;
 328
 329   //
 330
 331   dm[9]=-247.6;
 332   dm[10]=274.8124;
 333   dm[11]=278.;
 334
 335   //
 336
 337   dm[12]=253.6;
 338   dm[13]=274.8124;
 339   dm[14]=278.;
 340
 341   //
 342
 343   dm[15]=253.6;
 344   dm[16]=264.8;
 345   dm[17]=278.;
 346
 347   //
 348
 349   dm[18]=256.6;
 350   dm[19]=264.8;
 351   dm[20]=278.;
 352
 353   gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,21);
 354
 355   // Daughter volumes - sandwich
 356
 357   // Tpc SAndwich 1 - Al
 358
 359   dm[0]=274.8124;
 360   dm[1]=278.;
 361   dm[2]=252.1;
 362
 363   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
 364
 365   // Tpc SAndwich 2 - epoxy glue (I use Lexan)
 366
 367   dm[0] += 5.e-3;
 368   dm[1] -= 5.e-3;
 369
 370   gMC->Gsvolu("TSA2","TUBE",idtmed[14],dm,3);
 371
 372   // Tpc SAndwich 3 - Tedlar
 373
 374   dm[0] += 0.01;
 375   dm[1] -= 0.01;
 376
 377   gMC->Gsvolu("TSA3","TUBE",idtmed[9],dm,3);
 378
 379
 380   // Tpc SAndwich 4 - fiber glass (G10)
 381
 382   dm[0] += 3.8e-3;
 383   dm[1] -= 3.8e-3;
 384
 385   gMC->Gsvolu("TSA4","TUBE",idtmed[12],dm,3);
 386
 387   // Tpc SAndwich 5 - NOMEX honeycomb
 388
 389   dm[0] += 0.075;
 390   dm[1] -= 0.075;
 391
 392   gMC->Gsvolu("TSA5","TUBE",idtmed[6],dm,3);
 393
 394   // 5->4->3->2->1->TCOV
 395
 396
 397   gMC->Gspos("TSA5",1,"TSA4",0.,0.,0.,0,"ONLY");
 398   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
 399   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
 400   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");
 401
 402   gMC->Gspos("TSA1",1,"TOCV",0.,0.,3.,0,"ONLY");
 403
 404   // TCOV-> TOIN
 405
 406   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
 407
 408   //-------------------------------------------------------
 409   //  Tpc Outer Field Cage
 410   //  mother volume - Al, daughters - composite (sandwich)
 411   //-------------------------------------------------------
 412
 413   dm[0]=0.;
 414   dm[1]=360.;
 415   dm[2]=6.;
 416
 417   //
 418
 419   dm[3]=-253.6;
 420   dm[4]=258.;
 421   dm[5]=275.5;
 422
 423   //
 424
 425   dm[6]=-250.6;
 426   dm[7]=258.;
 427   dm[8]=275.5;
 428
 429   //
 430
 431   dm[9]=-250.6;
 432   dm[10]=258.;
 433   dm[11]=260.0476;
 434
 435   //
 436
 437   dm[12]=250.6;
 438   dm[13]=258.;
 439   dm[14]=260.0476;
 440
 441   //
 442
 443   dm[15]=250.6;
 444   dm[16]=258.;
 445   dm[17]=275.5;
 446
 447   //
 448
 449   dm[18]=253.6;
 450   dm[19]=258.;
 451   dm[20]=275.5;
 452
 453   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
 454
 455   // Daughter volumes
 456
 457   // Tpc SAndwich 6 - Tedlar
 458
 459   dm[0]= 258.;
 460   dm[1]= 260.0476;
 461   dm[2]= 252.1;
 462
 463   gMC->Gsvolu("TSA6","TUBE",idtmed[9],dm,3);
 464
 465   // Tpc SAndwich 7 - fiber glass
 466
 467   dm[0] += 3.8e-3;
 468   dm[1] -= 3.8e-3;
 469
 470   gMC->Gsvolu("TSA7","TUBE",idtmed[12],dm,3);
 471
 472
 473   // Tpc SAndwich 8 - NOMEX
 474
 475   dm[0] += 0.02;
 476   dm[1] -= 0.02;
 477
 478   gMC->Gsvolu("TSA8","TUBE",idtmed[6],dm,3);
 479
 480   // 8->7->6->TOFC
 481
 482   gMC->Gspos("TSA8",1,"TSA7",0.,0.,0.,0,"ONLY");
 483   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY");
 484   gMC->Gspos("TSA6",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   // inner part
 495
 496   //--------------------------------------------------------------------
 497   // Tpc Inner INsulator (CO2) - inner f.c. will be placed there
 498   // Inner containment vessel will be placed directly in the TPC
 499   //--------------------------------------------------------------------
 500
 501   dm[0]=0.;
 502   dm[1]=360.;
 503   dm[2]=4.;
 504
 505   //
 506
 507   dm[3]=-253.6;
 508   dm[4]=65.9;
 509   dm[5]=79.2;
 510
 511   //
 512
 513   dm[6]=-73.3;
 514   dm[7]=61.2;
 515   dm[8]=79.2;
 516
 517   //
 518
 519   dm[9]=73.3;
 520   dm[10]=61.2;
 521   dm[11]=79.2;
 522
 523   //
 524
 525   dm[12]=253.6;
 526   dm[13]=65.9;
 527   dm[14]=79.2;
 528
 529   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,15);
 530
 531   // the middle part of the F.C. is thinner - carve out the strip - Ne-CO2
 532
 533   dm[0]=79.16;
 534   dm[1]=79.2;
 535   dm[2]=88.;
 536
 537   gMC->Gsvolu("TII1","TUBE",idtmed[1],dm,3);
 538
 539   gMC->Gspos("TII1",1,"TIIN",0.,0.,0.,0,"ONLY");
 540
 541   //-----------------------------------------------------
 542   // Tpc Inner Field Cage
 543   // mother volume - Al, daughters - composite (sandwich)
 544   //------------------------------------------------------
 545
 546   dm[0]=0.;
 547   dm[1]=360.;
 548   dm[2]=10.;
 549
 550   //
 551
 552   dm[3]=-253.6;
 553   dm[4]=70.3;
 554   dm[5]=79.2;
 555
 556   //
 557
 558   dm[6]=-250.6;
 559   dm[7]=70.3;
 560   dm[8]=79.2;
 561
 562   //
 563
 564   dm[9]=-250.6;
 565   dm[10]=77.0524;
 566   dm[11]=79.2;
 567
 568   //
 569
 570   dm[12]=-88.;
 571   dm[13]=77.0524;
 572   dm[14]=79.2;
 573
 574   //
 575
 576   dm[15]=-88.;
 577   dm[16]=77.0924;
 578   dm[17]=79.16;
 579
 580   //
 581
 582   dm[18]=88.;
 583   dm[19]=77.0924;
 584   dm[20]=79.16;
 585
 586   //
 587
 588   dm[21]=88.;
 589   dm[22]=77.0524;
 590   dm[23]=79.2;
 591
 592   //
 593
 594   dm[24]=250.6;
 595   dm[25]=77.0524;
 596   dm[26]=79.2;
 597
 598   //
 599
 600   dm[27]=250.6;
 601   dm[28]=70.3;
 602   dm[29]=79.2;
 603
 604   //
 605
 606   dm[30]=253.6;
 607   dm[31]=70.3;
 608   dm[32]=79.2;
 609
 610   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,33);
 611
 612   // daughter volumes - central part
 613
 614   // Tpc Sandwich 9 -Tedlar
 615
 616   dm[0]=77.0924;
 617   dm[1]=79.16;
 618   dm[2]=88.;
 619
 620   gMC->Gsvolu("TSA9","TUBE",idtmed[9],dm,3);
 621
 622   // Tpc Sandwich 10 - fiber glass (G10)
 623
 624   dm[0] += 3.8e-3;
 625   dm[1] -= 3.8e-3;
 626
 627   gMC->Gsvolu("TS10","TUBE",idtmed[12],dm,3);
 628
 629   // Tpc Sandwich 11 - NOMEX
 630
 631   dm[0] += 0.03;
 632   dm[1] -= 0.03;
 633
 634   gMC->Gsvolu("TS11","TUBE",idtmed[6],dm,3);
 635
 636   // 11->10->9->TIFC
 637
 638   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
 639   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
 640
 641   gMC->Gspos("TSA9",1,"TIFC",0.,0.,0.,0,"ONLY");
 642
 643   // daughter volumes - outer parts (reinforced)
 644
 645   // Tpc Sandwich 12 -Tedlar
 646
 647   dm[0]=77.0524;
 648   dm[1]=79.2;
 649   dm[2]=82.05;
 650
 651   gMC->Gsvolu("TS12","TUBE",idtmed[9],dm,3);
 652
 653   // Tpc Sandwich 13 - fiber glass (G10)
 654
 655   dm[0] += 3.8e-3;
 656   dm[1] -= 3.8e-3;
 657
 658   gMC->Gsvolu("TS13","TUBE",idtmed[12],dm,3);
 659
 660   // Tpc Sandwich 14 - NOMEX
 661
 662   dm[0] += 0.07;
 663   dm[1] -= 0.07;
 664
 665   gMC->Gsvolu("TS14","TUBE",idtmed[6],dm,3);
 666
 667   // 14->13->12->TIFC
 668
 669   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
 670   gMC->Gspos("TS13",1,"TS12",0.,0.,0.,0,"ONLY");
 671
 672   gMC->Gspos("TS12",1,"TIFC",0.,0.,170.05,0,"ONLY");
 673   gMC->Gspos("TS12",2,"TIFC",0.,0.,-170.05,0,"ONLY");
 674
 675   // place this inside the inner insulator
 676
 677   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
 678
 679   // and now in the TPC...
 680
 681   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 682
 683   //---------------------------------------------------------
 684   // Tpc Inner Containment vessel - Cones
 685   //---------------------------------------------------------
 686
 687   dm[0]=0.;
 688   dm[1]=360.;
 689   dm[2]=8.;
 690
 691   //
 692
 693   dm[3]=71.8;
 694   dm[4]=56.9;
 695   dm[5]=59.4;
 696
 697   //
 698
 699   dm[6]=73.;
 700   dm[7]=56.9;
 701   dm[8]=59.4;
 702
 703   //
 704
 705   dm[9]=73.;
 706   dm[10]=56.9;
 707   dm[11]=61.2;
 708
 709   //
 710
 711   dm[12]=73.3;
 712   dm[13]=56.9;
 713   dm[14]=61.2;
 714
 715   //
 716
 717   dm[15]=73.3;
 718   dm[16]=60.9;
 719   dm[17]=61.2;
 720
 721   //
 722
 723   dm[18]=253.6;
 724   dm[19]=65.6;
 725   dm[20]=65.9;
 726
 727   //
 728
 729   dm[21]=253.6;
 730   dm[22]=65.6;
 731   dm[23]=74.6;
 732
 733   //
 734
 735   dm[24]=256.6;
 736   dm[25]=65.6;
 737   dm[26]=74.6;
 738
 739   gMC->Gsvolu("TICC","PCON",idtmed[4],dm,27);
 740
 741   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
 742
 743   // reflection matrix
 744
 745   theta1 = 90.;
 746   phi1   = 0.;
 747   theta2 = 90.;
 748   phi2   = 270.;
 749   theta3 = 180.;
 750   phi3   = 0.;
 751
 752   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 753
 754   gMC->Gspos("TICC",1,"TPC ",0.,0.,0.,0,"ONLY");
 755   gMC->Gspos("TICC",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 756
 757
 758   //---------------------------------------------------------
 759   // Tpc Inner Containment vessel - Middle part -Al
 760   //---------------------------------------------------------
 761
 762   dm[0]=0.;
 763   dm[1]=360.;
 764   dm[2]=6.;
 765
 766   //
 767
 768   dm[3]=-71.6;
 769   dm[4]=60.2;
 770   dm[5]=61.2;
 771
 772   //
 773
 774   dm[6]=-69.1;
 775   dm[7]=60.2;
 776   dm[8]=61.2;
 777
 778   //
 779
 780   dm[9]=-69.1;
 781   dm[10]=60.6224;
 782   dm[11]=61.2;
 783
 784   //
 785
 786   dm[12]=69.1;
 787   dm[13]=60.6224;
 788   dm[14]=61.2;
 789
 790   //
 791
 792   dm[15]=69.1;
 793   dm[16]=60.2;
 794   dm[17]=61.2;
 795
 796   //
 797
 798   dm[18]=71.6;
 799   dm[19]=60.2;
 800   dm[20]=61.2;
 801
 802   gMC->Gsvolu("TICM","PCON",idtmed[4],dm,21);
 803
 804   // Tpc Sandwich 15 - Al
 805
 806   dm[0]=60.6224;
 807   dm[1]=61.2;
 808   dm[2]=70.1;
 809
 810   gMC->Gsvolu("TS15","TUBE",idtmed[4],dm,3);
 811
 812   // Tpc Sandwich 16 -  epoxy glue
 813
 814   dm[0] += 5.e-3;
 815   dm[1] -= 5.e-3;
 816
 817   gMC->Gsvolu("TS16","TUBE",idtmed[14],dm,3);
 818
 819   // Tpc Sandwich 17 - Tedlar
 820
 821   dm[0] += 0.01;
 822   dm[1] -= 0.01;
 823
 824   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
 825
 826   // Tpc Sandwich 18 - carbon fiber
 827
 828   dm[0] += 3.8e-3;
 829   dm[1] -= 3.8e-3;
 830
 831   gMC->Gsvolu("TS18","TUBE",idtmed[15],dm,3);
 832
 833   // Tpc Sandwich 19 - Nomex
 834
 835   dm[0] += 0.02;
 836   dm[1] -= 0.02;
 837
 838   gMC->Gsvolu("TS19","TUBE",idtmed[6],dm,3);
 839
 840   // 19->18->17->16->15-> TICM
 841
 842   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY");
 843   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
 844   gMC->Gspos("TS17",1,"TS16",0.,0.,0.,0,"ONLY");
 845   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
 846
 847   gMC->Gspos("TS15",1,"TICM ",0.,0.,0.,0,"ONLY");
 848
 849
 850   // TPc inner cont. vessel Joints
 851
 852   dm[0]=60.2;
 853   dm[1]=61.2;
 854   dm[2]=0.5;
 855
 856   gMC->Gsvolu("TPJ1","TUBE",idtmed[4],dm,3);
 857
 858   gMC->Gspos("TPJ1",1,"TPC ",0.,0.,72.3,0,"ONLY");
 859   gMC->Gspos("TPJ1",2,"TPC ",0.,0.,-72.3,0,"ONLY");
 860
 861   //
 862
 863   dm[0]=0.;
 864   dm[1]=360.;
 865   dm[2]=4.;
 866
 867   //
 868
 869   dm[3]=70.8;
 870   dm[4]=58.4;
 871   dm[5]=60.1;
 872
 873   //
 874
 875   dm[6]=71.2;
 876   dm[7]=58.4;
 877   dm[8]=60.1;
 878
 879   //
 880
 881   dm[9]=71.2;
 882   dm[10]=58.4;
 883   dm[11]=59.4;
 884
 885   //
 886
 887   dm[12]=71.6;
 888   dm[13]=58.4;
 889   dm[14]=59.4;
 890
 891   gMC->Gsvolu("TPJ2","PCON",idtmed[4],dm,15);
 892
 893   gMC->Gspos("TPJ2",1,"TPC ",0.,0.,0.,0,"ONLY");
 894   gMC->Gspos("TPJ2",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 895
 896
 897
 898   // Tpc Inner Containment vessel Seal (Viton, I use Lexan for a time being)
 899
 900   dm[0]=58.4;
 901   dm[1]=61.2;
 902   dm[2]=0.1;
 903
 904   gMC->Gsvolu("TICS","TUBE",idtmed[14],dm,3);
 905
 906   gMC->Gspos("TICS",1,"TPC ",0.,0.,71.7,0,"ONLY");
 907   gMC->Gspos("TICS",2,"TPC ",0.,0.,-71.7,0,"ONLY");
 908
 909   // TICM -> TPC
 910
 911   gMC->Gspos("TICM",1,"TPC ",0.,0.,0.,0,"ONLY");
 912
 913   //
 914
 915   nRotMat++; // prepare for the next rotation matrix
 916
 917   //---------------------------------------------------------
 918   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
 919   //  and its daughters (HV membrane, rods, readout chambers)
 920   //---------------------------------------------------------
 921
 922   dm[0]= 79.2;
 923   dm[1]= 258.0;
 924   dm[2]= 253.6;
 925
 926   gMC->Gsvolu("TDGS","TUBE",idtmed[2],dm,3);
 927
 928   // sector opening angles
 929
 930   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
 931
 932   // sector angle shift
 933
 934   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
 935
 936   // number of sectors
 937
 938   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
 939   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
 940
 941   // All above parameters are identical for inner and outer
 942   // sectors. The distinction is kept for the historical reasons
 943   // and eventually will disappear.
 944
 945   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
 946   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
 947   Float_t space;
 948
 949   //-------------------------------------------------------------------------
 950   //   Tpc Inner Readout Chambers
 951   //-------------------------------------------------------------------------
 952
 953   dm[0]= 14.483;
 954   dm[1]= 23.3345;
 955   dm[2]= 1.6; // thickness
 956   dm[3]= 25.1;
 957
 958   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
 959
 960   // this volume will be positioned in the empty space
 961   // of the end-cap to avoid overlaps
 962
 963   dm[0]= 13.7305;
 964   dm[1]= 21.1895;
 965   dm[2]= 2.25;
 966   dm[3]= 21.15;
 967
 968   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
 969
 970
 971   //------------------------------------------------
 972   // Tpc Inner readout chamber Pad Plane
 973   //------------------------------------------------
 974
 975   dm[0]= 14.483;
 976   dm[1]= 23.3345;
 977   dm[2]= 0.5;
 978   dm[3]= 25.1;
 979
 980   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
 981
 982   //
 983
 984   dm[0] -= 1.218511934;
 985   dm[1] -= 1.218511934;
 986   dm[2] = 0.35;
 987
 988   gMC->Gsvolu("TIC3","TRD1",idtmed[1],dm,4);
 989
 990   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
 991
 992   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
 993
 994
 995   //----------------------------------------------
 996   // Tpc Readout Chambers Empty spaces - for both
 997   // inner and outer sectors
 998   //----------------------------------------------
 999
1000   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
1001
1002   // Inner sector - 4 spaces
1003
1004
1005   dm[3] = 4.7625;
1006   dm[0] = 12.472;
1007
1008   Float_t rr = 90.52;
1009   Float_t zz;
1010
1011   zz= -12.7875;
1012
1013   space = rr*tanAlpha-dm[0];
1014
1015   for(Int_t nsLow=0;nsLow<4;nsLow++){
1016
1017     rr += 9.525;
1018     dm[1]= rr*tanAlpha - space;
1019
1020     dm[2]=0.8;
1021
1022     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
1023
1024     //
1025
1026     dm[2] = 1.2;
1027
1028     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
1029
1030     rr += 0.4;
1031     dm[0] = rr*tanAlpha - space;
1032     zz += (0.4+9.525);
1033
1034   }
1035
1036   dm[0]= 12.472;
1037   // dm[1] - this is the dm[1] from the previous TRCE
1038   dm[2]= 1.05;
1039   dm[3]= 19.65;
1040
1041   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.2,0.,0,"ONLY",dm,4);
1042
1043   //
1044   // TPc Space for Connectors
1045   //
1046
1047   dm[0]= .3;
1048   dm[1]= .3;
1049   dm[2]= 4.5;
1050
1051   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
1052
1053   // TPC Connectors
1054
1055   dm[0]= .25;
1056   dm[1]= .15;
1057   dm[2]= 3.75;
1058
1059   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3);
1060
1061   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1062
1063   zz = -12.7875;
1064
1065
1066   Float_t alpha;
1067   Float_t astep;
1068
1069   // inner part of the inner sector - 2 x 20 holes
1070
1071   astep = 20.00096874/19.;
1072
1073   alpha = 10.00048437-astep;
1074
1075   Float_t x1,x2;
1076
1077     x1 = 13.31175725;
1078     x1 -= 0.996357832;
1079
1080     x2 = 15.06180253;
1081     x2 -= 1.163028812;
1082
1083   Int_t ncon;
1084
1085   for(ncon=0;ncon<20;ncon++){
1086
1087     phi1 = 0.;
1088     theta1 = 90.+alpha;
1089     phi2=90.;
1090     theta2 = 90.;
1091     phi3 = (alpha>0) ? 0. : 180.;
1092     theta3 = TMath::Abs(alpha);
1093
1094     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1095
1096
1097
1098     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1099     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1100
1101
1102     x1 -= 1.296357833;
1103     x2 -= 1.463028812;
1104
1105     alpha -= astep;
1106     nRotMat++;
1107
1108   }
1109
1110   // outer part of the inner sector - 2 x 25 holes
1111
1112    astep = 20.00096874/24.;
1113    alpha = 10.00048437-astep;
1114
1115    x1 = 16.81184781;
1116    x1 -= 1.016295986;
1117
1118    x2 = 18.5618931;
1119    x2 -= 1.150914854;
1120
1121   for(ncon=0;ncon<25;ncon++){
1122
1123     phi1 = 0.;
1124     theta1 = 90.+alpha;
1125     phi2=90.;
1126     theta2 = 90.;
1127     phi3 = (alpha>0) ? 0. : 180.;
1128     theta3 = TMath::Abs(alpha);
1129
1130     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1131
1132
1133
1134     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1135     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1136
1137
1138     x1 -= 1.316295986;
1139     x2 -= 1.450914854;
1140
1141     alpha -= astep;
1142     nRotMat++;
1143
1144   }
1145
1146   //--------------------------------------------------------------------------
1147   //  TPC Outer Readout Chambers
1148   //  this is NOT a final design
1149   //--------------------------------------------------------------------------
1150
1151   dm[0]= 23.3875;
1152   dm[1]= 43.524;
1153   dm[2]= 1.5; //thickness
1154   dm[3]= 57.1;
1155
1156   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1157
1158   //------------------------------------------------
1159   // Tpc Outer readout chamber Pad Plane
1160   //------------------------------------------------
1161
1162   dm[2]= 0.5;
1163
1164   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1165
1166   dm[0] -= 1.218511934;
1167   dm[1] -= 1.218511934;
1168   dm[2] = 0.35;
1169
1170   gMC->Gsvolu("TOC3","TRD1",idtmed[1],dm,4);
1171
1172   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1173
1174   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1175
1176   // empty space
1177
1178   dm[0]= 21.035;
1179   dm[1]= 38.7205;
1180   dm[2]= 0.7;
1181   dm[3]= 50.15;
1182
1183   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);
1184
1185   dm[0]= 22.2935;
1186   dm[1]= 40.5085;
1187   dm[2]= 2.25;
1188   dm[3]= 51.65;
1189
1190   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1191
1192   dm[0]= 21.35;
1193   dm[1]= 38.7205;
1194   dm[2]= 2.25;
1195   dm[3]= 50.15;
1196
1197   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1198
1199   //-----------------------------------------------
1200   // Tpc Services Support Wheel
1201   //-----------------------------------------------
1202
1203   dm[0]=0.;
1204   dm[1]=360.;
1205   dm[2]=18.;
1206   dm[3]=2.;
1207
1208   dm[4]= -5.;
1209   dm[5]= 77.017;
1210   dm[6]= 255.267;
1211
1212   dm[7]= 5.;
1213   dm[8]= dm[5];
1214   dm[9]= dm[6];
1215
1216   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1217
1218   // Tpc Services Wheel Cover
1219
1220   dm[4]= -0.5;
1221   dm[7]= 0.5;
1222
1223   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1224
1225   // Tpc Service wheel Cover Empty space
1226
1227   dm[0]= 10.99;
1228   dm[1]= 39.599;
1229   dm[2]= .5;
1230   dm[3]= 81.125;
1231
1232   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1233
1234   // Tpc services Wheel Empty Spaces
1235
1236   dm[0]= 13.18017507;
1237   dm[1]= 44.61045938;
1238   dm[2]= 4.;
1239   dm[3]= 89.125;
1240
1241   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1242
1243   // Tpc Services Wheel Bars
1244
1245   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1246
1247   // bars-> TWES
1248
1249   dm[2]= 4.;
1250   dm[3]= .4;
1251
1252   dm[0]= 13.8149522;
1253   dm[1]= 13.95601379;
1254
1255   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1256
1257   dm[0]= 43.83462067;
1258   dm[1]= 43.97568225;
1259
1260   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1261
1262   // TPc ELectronics - right now 30% X0 Si
1263
1264   dm[0]= 14.03813696;
1265   dm[1]= 43.3524075;
1266   dm[2]= 1.404;
1267   dm[3]= 83.125;
1268
1269   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1270   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1271
1272   //--------------------------------------------------------------------------
1273   //  End caps
1274   //--------------------------------------------------------------------------
1275
1276   // TPc Main Wheel - Al
1277
1278   dm[0]= 74.9;
1279   dm[1]= 264.4;
1280   dm[2]= 3.0;
1281
1282   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1283
1284   //--------------------------------------------------------------------------
1285   //  Tpc Empty Space for the Readout chambers
1286   //--------------------------------------------------------------------------
1287
1288   Float_t rLow= 86.2;
1289   Float_t rUp= 243.5;
1290   Float_t dR = 0.5*(rUp-rLow);
1291
1292   space= 1.5/cosAlpha; // wheel ribs are 3.0 cm wide
1293
1294   dm[0]= rLow*tanAlpha-space;
1295   dm[1]= rUp*tanAlpha-space;
1296   dm[2] = 3.0;
1297   dm[3]= dR;
1298
1299   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1300
1301   // TIC1->TESR
1302
1303   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1304
1305   // TOC1->TESR
1306
1307   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1308
1309   // Tpc Empty Space Bars - Al (daughters of TESR)
1310
1311   Float_t zBar;
1312
1313   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1314
1315   // lower bar
1316
1317   dm[0]= rLow*tanAlpha-space;
1318   dm[1]= 88.7*tanAlpha-space;
1319   dm[2]= 2.25;
1320   dm[3]= 1.275;
1321
1322   zBar = -dR+dm[3];
1323
1324   gMC->Gsposp("TESB",1,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1325
1326   // middle bar
1327
1328   dm[0]= 131.65*tanAlpha-space;
1329   dm[1]= 136.5*tanAlpha-space;
1330   dm[3]= 2.425;
1331
1332   zBar = -dR +131.65+dm[3]-rLow;
1333
1334   gMC->Gsposp("TESB",2,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1335
1336   // upper bar
1337
1338   dm[0]= 240.4*tanAlpha-space;
1339   dm[1]= rUp*tanAlpha-space;
1340   dm[3]= 1.55;
1341
1342   zBar = dR-dm[3];
1343
1344   gMC->Gsposp("TESB",3,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1345
1346   //  positioning of the empty spaces into the main wheel
1347
1348   Float_t rCenter,xc,yc;
1349   Float_t rInner,rOuter; // center of the inner and outer chamber
1350
1351   rCenter = rLow+dR;
1352
1353   rInner = 108.07;
1354   rOuter = 190.68;
1355
1356
1357   for(Int_t ns=0; ns<nInnerSector;ns++){
1358
1359     phi1 = ns * innerOpenAngle + innerAngleShift;
1360     phi1 *= kRaddeg; // in degrees
1361
1362     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1363
1364     if (phi1 > 360.) phi1 -= 360.;
1365
1366     theta1 = 90.;
1367     phi2   = 90.;
1368     theta2 = 180.;
1369     phi3   = ns * innerOpenAngle + innerAngleShift;
1370     phi3 *= kRaddeg; // in degrees
1371
1372     phi3 = (Float_t)TMath::Nint(phi3);
1373
1374     if(phi3 > 360.) phi3 -= 360.;
1375
1376     theta3 = 90.;
1377
1378     // "holes"->End plate
1379
1380     xc = rCenter*TMath::Cos(phi3*kDegrad);
1381     yc = rCenter*TMath::Sin(phi3*kDegrad);
1382
1383     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1384
1385     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1386
1387     // TSCE->TSWC (services wheel volumes)
1388
1389     xc = 166.142*TMath::Cos(phi3*kDegrad);
1390     yc = 166.142*TMath::Sin(phi3*kDegrad);
1391
1392     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1393     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1394
1395
1396     // readout chambers->TDGS (drift gas)
1397
1398     xc = rInner*TMath::Cos(phi3*kDegrad);
1399     yc = rInner*TMath::Sin(phi3*kDegrad);
1400
1401     gMC->Gspos("TIRC",ns+1,"TDGS",xc,yc,252.,idrotm[nRotMat],"ONLY");
1402
1403     xc = rOuter*TMath::Cos(phi3*kDegrad);
1404     yc = rOuter*TMath::Sin(phi3*kDegrad);
1405
1406     gMC->Gspos("TORC",ns+1,"TDGS",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1407
1408     nRotMat++;
1409
1410     theta2 = 0.; // reflection
1411
1412     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1413
1414     xc = rInner*TMath::Cos(phi3*kDegrad);
1415     yc = rInner*TMath::Sin(phi3*kDegrad);
1416
1417     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGS",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1418
1419     xc = rOuter*TMath::Cos(phi3*kDegrad);
1420     yc = rOuter*TMath::Sin(phi3*kDegrad);
1421
1422     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGS",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1423
1424     nRotMat++;
1425
1426   }
1427   // TPMW->TPC
1428
1429   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1430   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[0],"ONLY");
1431
1432   //---------------------------------------------------------
1433   //  Tpc High Voltage Membrane - 100 microns of mylar
1434   //---------------------------------------------------------
1435
1436   dm[0]=82.8;
1437   dm[1]=252.;
1438   dm[2]=0.005;
1439
1440   gMC->Gsvolu("THVM","TUBE",idtmed[8],dm,3);
1441
1442   gMC->Gspos("THVM",1,"TDGS",0.,0.,0.,0,"ONLY");
1443
1444   // Tpc High Voltage membrane Holders
1445
1446   gMC->Gsvolu("THVH","TUBE",idtmed[4],dm,0);
1447
1448
1449
1450   // inner
1451
1452   dm[0]=79.3;
1453   dm[1]=82.8;
1454   dm[2]=0.2;
1455
1456   gMC->Gsposp("THVH",1,"TDGS",0.,0.,0.,0,"ONLY",dm,3);
1457
1458   // outer
1459
1460   dm[0]= 252.;
1461   dm[1]= 257.9;
1462   dm[2]= 0.4;
1463
1464   gMC->Gsposp("THVH",2,"TDGS",0.,0.,0.,0,"ONLY",dm,3);
1465
1466   //----------------------------------------------------------
1467   // TPc Support Rods - MAKROLON
1468   //----------------------------------------------------------
1469
1470   dm[0]= 0.9;
1471   dm[1]= 1.2;
1472
1473   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,0); // inner and outer rods differ
1474
1475
1476   for(Int_t nrod=0;nrod<18;nrod++){
1477     Float_t angle=innerOpenAngle*(Float_t)nrod;
1478
1479     xc=81.5*TMath::Cos(angle);
1480     yc=81.5*TMath::Sin(angle);
1481
1482     dm[2]=126.7;
1483
1484     gMC->Gsposp("TPSR",nrod+1,"TDGS",xc,yc,126.9,0,"ONLY",dm,3);
1485     gMC->Gsposp("TPSR",nrod+19,"TDGS",xc,yc,-126.9,0,"ONLY",dm,3);
1486
1487     dm[2]=126.6;
1488
1489     xc=254.25*TMath::Cos(angle);
1490     yc=254.25*TMath::Sin(angle);
1491
1492     // rod number 54 contans the HV cable
1493
1494     if(nrod<17) {
1495       gMC->Gsposp("TPSR",nrod+37,"TDGS",xc,yc,127.,0,"ONLY",dm,3);
1496       gMC->Gsposp("TPSR",nrod+54,"TDGS",xc,yc,-127.,0,"ONLY",dm,3);
1497     }
1498
1499   }
1500
1501   //----------------------------------------------------------
1502   // Tpc High Voltage Rod - MAKROLON + Copper cable
1503   //----------------------------------------------------------
1504
1505   // rod with cable (Left)
1506
1507   dm[0]=0.;
1508   dm[1]=2.25;
1509   dm[2]=126.6;
1510
1511   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1512
1513   // HV cable
1514
1515   dm[0]=0.;
1516   dm[1]=0.3;
1517   dm[2]=126.6;
1518
1519   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);
1520
1521   // empty space
1522
1523   dm[0]=0.3;
1524   dm[1]=1.;
1525   dm[2]=126.6;
1526
1527   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1528
1529   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1530   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1531
1532   // rod without cable
1533
1534   dm[0]=1.8;
1535   dm[1]=2.25;
1536   dm[2]=126.6;
1537
1538   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1539
1540   gMC->Gspos("THVL",1,"TDGS",xc,yc,-127.,0,"ONLY");
1541   gMC->Gspos("THVR",1,"TDGS",xc,yc,127.,0,"ONLY");
1542
1543   gMC->Gspos("TDGS",1,"TPC ",0.,0.,0.,0,"ONLY");
1544
1545   // services wheel cover -> wheel
1546
1547
1548   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1549   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1550
1551
1552   // put the wheel into the TPC
1553
1554   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1555   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1556
1557   //
1558
1559   gMC->Gsord("TPMW",6);
1560   gMC->Gsord("TSSW",6);
1561   gMC->Gsord("TSWC",6);
1562
1563   // put the TPC into ALIC (main mother volume)
1564
1565   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1566
1567
1568 } // end of function
1569
1570 //_____________________________________________________________________________
1571 void AliTPCv3::DrawDetector()
1572 {
1573   //
1574   // Draw a shaded view of the Time Projection Chamber version 3
1575   //
1576
1577
1578   // Set everything unseen
1579   gMC->Gsatt("*", "seen", -1);
1580   //
1581   // Set ALIC mother transparent
1582   gMC->Gsatt("ALIC","SEEN",0);
1583   //
1584   // Set the volumes visible
1585   //
1586
1587   gMC->Gsatt("TPC ","SEEN",0);
1588   gMC->Gsatt("TOIN","SEEN",1);
1589   gMC->Gsatt("TOIN","COLO",7);
1590   gMC->Gsatt("TOCV","SEEN",1);
1591   gMC->Gsatt("TOCV","COLO",4);
1592   gMC->Gsatt("TSA1","SEEN",0);
1593   gMC->Gsatt("TSA2","SEEN",0);
1594   gMC->Gsatt("TSA3","SEEN",0);
1595   gMC->Gsatt("TSA4","SEEN",0);
1596   gMC->Gsatt("TSA5","SEEN",0);
1597   gMC->Gsatt("TOFC","SEEN",1);
1598   gMC->Gsatt("TOFC","COLO",4);
1599   gMC->Gsatt("TSA6","SEEN",0);
1600   gMC->Gsatt("TSA7","SEEN",0);
1601   gMC->Gsatt("TSA8","SEEN",0);
1602   gMC->Gsatt("TIIN","SEEN",1);
1603   gMC->Gsatt("TIIN","COLO",7);
1604   gMC->Gsatt("TII1","SEEN",0);
1605   gMC->Gsatt("TIFC","SEEN",1);
1606   gMC->Gsatt("TIFC","COLO",4);
1607   gMC->Gsatt("TSA9","SEEN",0);
1608   gMC->Gsatt("TS10","SEEN",0);
1609   gMC->Gsatt("TS11","SEEN",0);
1610   gMC->Gsatt("TS12","SEEN",0);
1611   gMC->Gsatt("TS13","SEEN",0);
1612   gMC->Gsatt("TS14","SEEN",0);
1613   gMC->Gsatt("TICC","SEEN",0);
1614   gMC->Gsatt("TICM","SEEN",0);
1615   gMC->Gsatt("TS15","SEEN",0);
1616   gMC->Gsatt("TS16","SEEN",0);
1617   gMC->Gsatt("TS17","SEEN",0);
1618   gMC->Gsatt("TS18","SEEN",0);
1619   gMC->Gsatt("TS19","SEEN",0);
1620   gMC->Gsatt("TPJ1","SEEN",0);
1621   gMC->Gsatt("TPJ2","SEEN",0);
1622   gMC->Gsatt("TICS","SEEN",0);
1623   gMC->Gsatt("TDGS","SEEN",0);
1624   gMC->Gsatt("TIRC","SEEN",0);
1625   gMC->Gsatt("TIC1","SEEN",1);
1626   gMC->Gsatt("TIPP","SEEN",0);
1627   gMC->Gsatt("TIC3","SEEN",0);
1628   gMC->Gsatt("TRCE","SEEN",0);
1629   gMC->Gsatt("TPSC","SEEN",0);
1630   gMC->Gsatt("TPCC","SEEN",0);
1631   gMC->Gsatt("TORC","SEEN",0);
1632   gMC->Gsatt("TOPP","SEEN",0);
1633   gMC->Gsatt("TOC3","SEEN",0);
1634   gMC->Gsatt("TOC1","SEEN",1);
1635   gMC->Gsatt("TSSW","SEEN",1);
1636   gMC->Gsatt("TSWC","SEEN",1);
1637   gMC->Gsatt("TSSW","COLO",3);
1638   gMC->Gsatt("TSWC","COLO",3);
1639   gMC->Gsatt("TSCE","COLO",6);
1640   gMC->Gsatt("TSCE","SEEN",1);
1641   gMC->Gsatt("TWES","SEEN",0);
1642   gMC->Gsatt("TSWB","SEEN",0);
1643   gMC->Gsatt("TPEL","SEEN",0);
1644   gMC->Gsatt("TPMW","SEEN",1);
1645   gMC->Gsatt("TESR","SEEN",1);
1646   gMC->Gsatt("TPMW","COLO",12);
1647   gMC->Gsatt("TIC1","COLO",5);
1648   gMC->Gsatt("TOC1","COLO",5);
1649   gMC->Gsatt("TESB","SEEN",0);
1650   gMC->Gsatt("THVM","SEEN",1);
1651   gMC->Gsatt("THVM","COLO",11);
1652   gMC->Gsatt("THVH","SEEN",0);
1653   gMC->Gsatt("TPSR","SEEN",0);
1654   gMC->Gsatt("THVL","SEEN",0);
1655   gMC->Gsatt("THVC","SEEN",0);
1656   gMC->Gsatt("THVE","SEEN",0);
1657   gMC->Gsatt("THVR","SEEN",0);
1658
1659   //
1660   gMC->Gdopt("hide", "on");
1661   gMC->Gdopt("shad", "on");
1662   gMC->Gsatt("*", "fill", 7);
1663   gMC->SetClipBox(".");
1664   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1665   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1666   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1667   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1668   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1669   gMC->DefaultRange();
1670   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1671   gMC->Gdhead(1111, "Time Projection Chamber");
1672   gMC->Gdman(18, 4, "MAN");
1673   gMC->Gdopt("hide","off");
1674 }
1675
1676 //_____________________________________________________________________________
1677 void AliTPCv3::CreateMaterials()
1678 {
1679   //
1680   // Define materials for version 2 of the Time Projection Chamber
1681   //
1682
1683
1684   //
1685   AliTPC::CreateMaterials();
1686 }
1687
1688 //_____________________________________________________________________________
1689 void AliTPCv3::Init()
1690 {
1691   //
1692   // Initialises version 3 of the TPC after that it has been built
1693   //
1694   Int_t *idtmed = fIdtmed->GetArray();
1695
1696   AliTPC::Init();
1697
1698   fIdSens=gMC->VolId("TDGS"); // drift gas as a sensitive volume
1699
1700   gMC->SetMaxNStep(30000); // max. number of steps increased
1701
1702   gMC->Gstpar(idtmed[2],"LOSS",5);
1703
1704   printf("%s: *** TPC version 3 initialized***\n",ClassName());
1705
1706   printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
1707
1708   // printf("*** TPC version 3 initialized ***\n");
1709   // printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
1710
1711   //
1712
1713 }
1714
1715 //_____________________________________________________________________________
1716 void AliTPCv3::StepManager()
1717 {
1718   //
1719   // Called for every step in the Time Projection Chamber
1720   //
1721
1722   //
1723   // parameters used for the energy loss calculations
1724   //
1725   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1726   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1727   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1728
1729
1730   const Float_t kbig = 1.e10;
1731
1732   Int_t id,copy;
1733   TLorentzVector pos;
1734   Float_t hits[4];
1735   Int_t vol[2];
1736
1737   vol[1]=0;
1738   vol[0]=0;
1739
1740   //
1741
1742   gMC->SetMaxStep(kbig);
1743
1744   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1745
1746   Float_t charge = gMC->TrackCharge();
1747
1748   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1749
1750
1751   id=gMC->CurrentVolID(copy);
1752
1753   // Check the sensitive volume
1754
1755   if (id != fIdSens) return;
1756
1757   //
1758   //  charged particle is in the sensitive volume
1759   //
1760
1761   if(gMC->TrackStep() > 0) {
1762
1763
1764     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1765     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1766
1767     gMC->TrackPosition(pos);
1768     hits[0]=pos[0];
1769     hits[1]=pos[1];
1770     hits[2]=pos[2];
1771
1772     //
1773     // check the selected side of the TPC
1774     //
1775
1776     if(fSide && fSide*hits[2]<=0.) return;
1777
1778     hits[3]=(Float_t)nel;
1779
1780     // Add this hit
1781
1782     AddHit(gAlice->CurrentTrack(), vol,hits);  //MI change
1783
1784   }
1785
1786   // Stemax calculation for the next step
1787
1788   Float_t pp;
1789   TLorentzVector mom;
1790   gMC->TrackMomentum(mom);
1791   Float_t ptot=mom.Rho();
1792   Float_t betaGamma = ptot/gMC->TrackMass();
1793
1794   Int_t pid=gMC->TrackPid();
1795   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1796     {
1797       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1798     }
1799   else
1800     {
1801       betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3);
1802       pp=kprim*BetheBloch(betaGamma);
1803       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1804     }
1805
1806   Double_t rnd = gMC->GetRandom()->Rndm();
1807
1808   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1809
1810 }
1811
1812 //_____________________________________________________________________________
1813 Float_t AliTPCv3::BetheBloch(Float_t bg)
1814 {
1815   //
1816   // Bethe-Bloch energy loss formula
1817   //
1818   const Double_t kp1=0.76176e-1;
1819   const Double_t kp2=10.632;
1820   const Double_t kp3=0.13279e-4;
1821   const Double_t kp4=1.8631;
1822   const Double_t kp5=1.9479;
1823
1824   Double_t dbg = (Double_t) bg;
1825
1826   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1827
1828   Double_t aa = TMath::Power(beta,kp4);
1829   Double_t bb = TMath::Power(1./dbg,kp5);
1830
1831   bb=TMath::Log(kp3+bb);
1832
1833   return ((Float_t)((kp2-aa-bb)*kp1/aa));
1834 }