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 1.32  2003/01/14 10:50:20  alibrary
  19 Cleanup of STEER coding conventions
  20
  21 Revision 1.31  2002/11/21 22:43:33  alibrary
  22 Removing AliMC and AliMCProcess
  23
  24 Revision 1.30  2002/10/14 14:57:43  hristov
  25 Merging the VirtualMC branch to the main development branch (HEAD)
  26
  27 Revision 1.29.6.2  2002/07/24 10:09:01  alibrary
  28 Updating VirtualMC
  29
  30 Revision 1.29  2002/01/21 17:12:00  kowal2
  31 New track hits structure using root containers
  32
  33 Revision 1.28  2001/06/12 07:07:41  kowal2
  34 New files for folder and stack
  35
  36 Revision 1.27  2001/05/08 16:03:06  kowal2
  37 Geometry update according to the latest technical spec.
  38
  39 Revision 1.26  2001/04/27 15:23:07  kowal2
  40 Correct materian in the central part of the inner containment vessel
  41
  42 Revision 1.25  2001/04/26 06:15:12  kowal2
  43 Corrected bug in the inner containment vessel (cones)
  44
  45 Revision 1.24  2001/04/24 11:22:01  kowal2
  46 Protection against too small betagamma
  47
  48 Revision 1.23  2001/04/24 11:17:33  kowal2
  49 New TPC geometry.
  50
  51 Revision 1.22  2001/03/13 13:07:34  kowal2
  52 Corrected bug in the TPC mother volume geometry.
  53 Thanks to A. Morsch
  54
  55 Revision 1.21  2000/11/30 11:48:50  kowal2
  56 TLorentzVector.h adde to satisfy the latest changes by Federico
  57
  58 Revision 1.20  2000/11/14 10:48:57  kowal2
  59 Correct material used for TSA4. Thanks to J. Barbosa.
  60
  61 Revision 1.19  2000/11/06 17:24:10  kowal2
  62 Corrected bug in the outer containment vessel and
  63 the outer field cage geometry.
  64 Thanks to J. Barbosa.
  65
  66 Revision 1.18  2000/11/02 16:55:24  kowal2
  67 Corrected bug in the inner containment vessel geometry.
  68 Thanks to J. Belikov
  69
  70 Revision 1.17  2000/11/02 07:24:11  kowal2
  71 Correction in the TPC geometry.
  72 Changes due to the new hit structure.
  73
  74 Revision 1.16  2000/10/02 21:28:18  fca
  75 Removal of useless dependecies via forward declarations
  76
  77 Revision 1.15  2000/07/10 20:57:39  hristov
  78 Update of TPC code and macros by M.Kowalski
  79
  80 Revision 1.14  2000/06/30 12:07:50  kowal2
  81 Updated from the TPC-PreRelease branch
  82
  83 Revision 1.13.2.4  2000/06/26 07:39:42  kowal2
  84 Changes to obey the coding rules
  85
  86 Revision 1.13.2.3  2000/06/25 08:38:41  kowal2
  87 Splitted from AliTPCtracking
  88
  89 Revision 1.13.2.2  2000/06/16 12:58:13  kowal2
  90 Changed parameter settings
  91
  92 Revision 1.13.2.1  2000/06/09 07:15:07  kowal2
  93
  94 Defaults loaded automatically (hard-wired)
  95 Optional parameters can be set via macro called in the constructor
  96
  97 Revision 1.13  2000/05/15 10:00:30  kowal2
  98 Corrected bug in the TPC geometry, thanks to Ivana Hrivnacova
  99
 100 Revision 1.12  2000/04/17 09:37:33  kowal2
 101 removed obsolete AliTPCDigitsDisplay.C
 102
 103 Revision 1.11.8.2  2000/04/10 08:36:12  kowal2
 104
 105 Updated readout chambers
 106 Some modifications to StepManager by M. Kowalski
 107
 108 Revision 1.11.8.1  2000/04/10 07:56:53  kowal2
 109 Not used anymore - removed
 110
 111 Revision 1.11  1999/11/04 17:28:07  fca
 112 Correct barrel part of HV Degrader
 113
 114 Revision 1.10  1999/10/14 16:52:08  fca
 115 Only use PDG codes and not GEANT ones
 116
 117 Revision 1.9  1999/10/08 06:27:23  fca
 118 Corrected bug in the HV degrader geometry, thanks to G.Tabary
 119
 120 Revision 1.8  1999/10/04 13:39:55  fca
 121 Correct array index problem
 122
 123 Revision 1.7  1999/09/29 09:24:34  fca
 124 Introduction of the Copyright and cvs Log
 125
 126 */
 127
 128 //
 129 ///////////////////////////////////////////////////////////////////////////////
 130 //                                                                           //
 131 //  Time Projection Chamber version 3 -- detailed TPC and slow simulation    //
 132 //
 133 //Begin_Html
 134 /*
 135 <img src="picts/AliTPCv3Class.gif">
 136 */
 137 //End_Html
 138 //                                                                           //
 139 //                                                                           //
 140 ///////////////////////////////////////////////////////////////////////////////
 141
 142 #include <stdlib.h>
 143
 144 #include <TLorentzVector.h>
 145 #include <TPDGCode.h>
 146 #include <TInterpreter.h>
 147 #include <TMath.h>
 148
 149 #include "AliConst.h"
 150 #include "AliRun.h"
 151 #include "AliTPCDigitsArray.h"
 152 #include "AliTPCParam.h"
 153 #include "AliTPCParamSR.h"
 154 #include "AliTPCTrackHitsV2.h"
 155 #include "AliTPCv3.h"
 156
 157 ClassImp(AliTPCv3)
 158 //_____________________________________________________________________________
 159
 160   AliTPCv3::AliTPCv3(){
 161
 162   fHitType = 1;
 163
 164 }
 165
 166 //_____________________________________________________________________________
 167 AliTPCv3::AliTPCv3(const char *name, const char *title) :
 168   AliTPC(name, title)
 169 {
 170   //
 171   // Standard constructor for Time Projection Chamber version 3
 172   //
 173
 174   SetBufferSize(128000);
 175   fIdSens=0;
 176
 177   SetGasMixt(2,20,10,-1,0.9,0.1,0.);
 178
 179   if (fTPCParam)
 180      fTPCParam->Write(fTPCParam->GetTitle());
 181
 182   fHitType =1;
 183 }
 184
 185 //_____________________________________________________________________________
 186 void AliTPCv3::CreateGeometry()
 187 {
 188   //
 189   // Creation of the TPC coarse geometry (version 3)
 190   // The whole drift volume is sensitive
 191   // Origin Marek Kowalski Cracow
 192   //
 193   //Begin_Html
 194   /*
 195     <img src="picts/AliTPCgif">
 196   */
 197   //End_Html
 198   //Begin_Html
 199   /*
 200     <img src="picts/AliTPCv3Tree.gif">
 201   */
 202   //End_Html
 203   Float_t dm[50];
 204
 205   Int_t *idtmed = fIdtmed->GetArray(); // TPC media
 206
 207   Int_t idrotm[120]; // rotation matrices
 208
 209   Int_t nRotMat = 0; // actual number of rotation matrices
 210
 211
 212   //
 213   //  Mother volume (Air) - all volumes will be positioned in it
 214   //
 215
 216   dm[0]=0.;
 217   dm[1]=360.;
 218   dm[2]=8.;
 219
 220   //
 221
 222   dm[3]=-283.7;
 223   dm[4]=65.6;
 224   dm[5]=278.;
 225
 226   //
 227
 228   dm[6]=-253.6;
 229   dm[7]=65.6;
 230   dm[8]=278.;
 231
 232   //
 233
 234   dm[9]=-73.3;
 235   dm[10]=60.9;
 236   dm[11]=278.;
 237
 238   //
 239
 240   dm[12]=-73.3;
 241   dm[13]=56.9;
 242   dm[14]=278.;
 243
 244   //
 245
 246   dm[15]=73.3;
 247   dm[16]=56.9;
 248   dm[17]=278.;
 249
 250   //
 251
 252   dm[18]=73.3;
 253   dm[19]=60.9;
 254   dm[20]=278.;
 255
 256   //
 257
 258   dm[21]=253.6;
 259   dm[22]=65.6;
 260   dm[23]=278.;
 261
 262   //
 263
 264   dm[24]=283.7;
 265   dm[25]=65.6;
 266   dm[26]=278.;
 267
 268   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,27);
 269
 270   // outer part
 271
 272   //-------------------------------------------------------------------
 273   //   Tpc Outer INsulator (CO2) - contains cont. vessel and field cage
 274   //-------------------------------------------------------------------
 275
 276   dm[0]= 0.;
 277   dm[1]= 360.;
 278   dm[2]= 6.;
 279
 280   //
 281
 282   dm[3]=-253.6;
 283   dm[4]=258.;
 284   dm[5]=275.5;
 285
 286   //
 287
 288   dm[6]=-250.6;
 289   dm[7]=258.;
 290   dm[8]=275.5;
 291
 292   //
 293
 294   dm[9]=-250.6;
 295   dm[10]=258.;
 296   dm[11]=278.;
 297
 298   //
 299
 300   dm[12]=253.6;
 301   dm[13]=258.;
 302   dm[14]=278.;
 303
 304   //
 305
 306   dm[15]=253.6;
 307   dm[16]=264.8;
 308   dm[17]=278.;
 309
 310   //
 311
 312   dm[18]=256.6;
 313   dm[19]=264.8;
 314   dm[20]=278.;
 315
 316   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
 317
 318   //----------------------------------------------------------------
 319   // Tpc Outer Contaiment Vessel
 320   //  mother volume - Al, daughters - composite (sandwich)
 321   //----------------------------------------------------------------
 322
 323   dm[0]=0.;
 324   dm[1]=360.;
 325   dm[2]=6.;
 326
 327   //
 328
 329   dm[3]=-250.6;
 330   dm[4]=270.4;
 331   dm[5]=278.;
 332
 333   //
 334
 335   dm[6]=-247.6;
 336   dm[7]=270.4;
 337   dm[8]=278.;
 338
 339   //
 340
 341   dm[9]=-247.6;
 342   dm[10]=274.8124;
 343   dm[11]=278.;
 344
 345   //
 346
 347   dm[12]=253.6;
 348   dm[13]=274.8124;
 349   dm[14]=278.;
 350
 351   //
 352
 353   dm[15]=253.6;
 354   dm[16]=264.8;
 355   dm[17]=278.;
 356
 357   //
 358
 359   dm[18]=256.6;
 360   dm[19]=264.8;
 361   dm[20]=278.;
 362
 363   gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,21);
 364
 365   // Daughter volumes - sandwich
 366
 367   // Tpc SAndwich 1 - Al
 368
 369   dm[0]=274.8124;
 370   dm[1]=278.;
 371   dm[2]=252.1;
 372
 373   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
 374
 375   // Tpc SAndwich 2 - epoxy glue (I use Lexan)
 376
 377   dm[0] += 5.e-3;
 378   dm[1] -= 5.e-3;
 379
 380   gMC->Gsvolu("TSA2","TUBE",idtmed[14],dm,3);
 381
 382   // Tpc SAndwich 3 - Tedlar
 383
 384   dm[0] += 0.01;
 385   dm[1] -= 0.01;
 386
 387   gMC->Gsvolu("TSA3","TUBE",idtmed[9],dm,3);
 388
 389
 390   // Tpc SAndwich 4 - fiber glass (G10)
 391
 392   dm[0] += 3.8e-3;
 393   dm[1] -= 3.8e-3;
 394
 395   gMC->Gsvolu("TSA4","TUBE",idtmed[12],dm,3);
 396
 397   // Tpc SAndwich 5 - NOMEX honeycomb
 398
 399   dm[0] += 0.075;
 400   dm[1] -= 0.075;
 401
 402   gMC->Gsvolu("TSA5","TUBE",idtmed[6],dm,3);
 403
 404   // 5->4->3->2->1->TCOV
 405
 406
 407   gMC->Gspos("TSA5",1,"TSA4",0.,0.,0.,0,"ONLY");
 408   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
 409   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
 410   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");
 411
 412   gMC->Gspos("TSA1",1,"TOCV",0.,0.,3.,0,"ONLY");
 413
 414   // TCOV-> TOIN
 415
 416   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
 417
 418   //-------------------------------------------------------
 419   //  Tpc Outer Field Cage
 420   //  mother volume - Al, daughters - composite (sandwich)
 421   //-------------------------------------------------------
 422
 423   dm[0]=0.;
 424   dm[1]=360.;
 425   dm[2]=6.;
 426
 427   //
 428
 429   dm[3]=-253.6;
 430   dm[4]=258.;
 431   dm[5]=275.5;
 432
 433   //
 434
 435   dm[6]=-250.6;
 436   dm[7]=258.;
 437   dm[8]=275.5;
 438
 439   //
 440
 441   dm[9]=-250.6;
 442   dm[10]=258.;
 443   dm[11]=260.0476;
 444
 445   //
 446
 447   dm[12]=250.6;
 448   dm[13]=258.;
 449   dm[14]=260.0476;
 450
 451   //
 452
 453   dm[15]=250.6;
 454   dm[16]=258.;
 455   dm[17]=269.6;
 456
 457   //
 458
 459   dm[18]=253.6;
 460   dm[19]=258.;
 461   dm[20]=269.6;
 462
 463   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
 464
 465   // Daughter volumes
 466
 467   // Tpc SAndwich 6 - Tedlar
 468
 469   dm[0]= 258.;
 470   dm[1]= 260.0476;
 471   dm[2]= 252.1;
 472
 473   gMC->Gsvolu("TSA6","TUBE",idtmed[9],dm,3);
 474
 475   // Tpc SAndwich 7 - fiber glass
 476
 477   dm[0] += 3.8e-3;
 478   dm[1] -= 3.8e-3;
 479
 480   gMC->Gsvolu("TSA7","TUBE",idtmed[12],dm,3);
 481
 482
 483   // Tpc SAndwich 8 - NOMEX
 484
 485   dm[0] += 0.02;
 486   dm[1] -= 0.02;
 487
 488   gMC->Gsvolu("TSA8","TUBE",idtmed[6],dm,3);
 489
 490   // 8->7->6->TOFC
 491
 492   gMC->Gspos("TSA8",1,"TSA7",0.,0.,0.,0,"ONLY");
 493   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY");
 494   gMC->Gspos("TSA6",1,"TOFC",0.,0.,0.,0,"ONLY");
 495
 496   // TOFC->TOIN
 497
 498   gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
 499
 500   // TOIN->TPC
 501
 502   gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 503
 504   // inner part
 505
 506   //--------------------------------------------------------------------
 507   // Tpc Inner INsulator (CO2) - inner f.c. will be placed there
 508   // Inner containment vessel will be placed directly in the TPC
 509   //--------------------------------------------------------------------
 510
 511   dm[0]=0.;
 512   dm[1]=360.;
 513   dm[2]=4.;
 514
 515   //
 516
 517   dm[3]=-253.6;
 518   dm[4]=65.9;
 519   dm[5]=79.2;
 520
 521   //
 522
 523   dm[6]=-73.3;
 524   dm[7]=61.2;
 525   dm[8]=79.2;
 526
 527   //
 528
 529   dm[9]=73.3;
 530   dm[10]=61.2;
 531   dm[11]=79.2;
 532
 533   //
 534
 535   dm[12]=253.6;
 536   dm[13]=65.9;
 537   dm[14]=79.2;
 538
 539   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,15);
 540
 541   // the middle part of the F.C. is thinner - carve out the strip - Ne-CO2
 542
 543   dm[0]=79.16;
 544   dm[1]=79.2;
 545   dm[2]=88.;
 546
 547   gMC->Gsvolu("TII1","TUBE",idtmed[1],dm,3);
 548
 549   gMC->Gspos("TII1",1,"TIIN",0.,0.,0.,0,"ONLY");
 550
 551   //-----------------------------------------------------
 552   // Tpc Inner Field Cage
 553   // mother volume - Al, daughters - composite (sandwich)
 554   //------------------------------------------------------
 555
 556   dm[0]=0.;
 557   dm[1]=360.;
 558   dm[2]=10.;
 559
 560   //
 561
 562   dm[3]=-253.6;
 563   dm[4]=70.3;
 564   dm[5]=79.2;
 565
 566   //
 567
 568   dm[6]=-250.6;
 569   dm[7]=70.3;
 570   dm[8]=79.2;
 571
 572   //
 573
 574   dm[9]=-250.6;
 575   dm[10]=77.0524;
 576   dm[11]=79.2;
 577
 578   //
 579
 580   dm[12]=-88.;
 581   dm[13]=77.0524;
 582   dm[14]=79.2;
 583
 584   //
 585
 586   dm[15]=-88.;
 587   dm[16]=77.0924;
 588   dm[17]=79.16;
 589
 590   //
 591
 592   dm[18]=88.;
 593   dm[19]=77.0924;
 594   dm[20]=79.16;
 595
 596   //
 597
 598   dm[21]=88.;
 599   dm[22]=77.0524;
 600   dm[23]=79.2;
 601
 602   //
 603
 604   dm[24]=250.6;
 605   dm[25]=77.0524;
 606   dm[26]=79.2;
 607
 608   //
 609
 610   dm[27]=250.6;
 611   dm[28]=70.3;
 612   dm[29]=79.2;
 613
 614   //
 615
 616   dm[30]=253.6;
 617   dm[31]=70.3;
 618   dm[32]=79.2;
 619
 620   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,33);
 621
 622   // daughter volumes - central part
 623
 624   // Tpc Sandwich 9 -Tedlar
 625
 626   dm[0]=77.0924;
 627   dm[1]=79.16;
 628   dm[2]=88.;
 629
 630   gMC->Gsvolu("TSA9","TUBE",idtmed[9],dm,3);
 631
 632   // Tpc Sandwich 10 - fiber glass (G10)
 633
 634   dm[0] += 3.8e-3;
 635   dm[1] -= 3.8e-3;
 636
 637   gMC->Gsvolu("TS10","TUBE",idtmed[12],dm,3);
 638
 639   // Tpc Sandwich 11 - NOMEX
 640
 641   dm[0] += 0.03;
 642   dm[1] -= 0.03;
 643
 644   gMC->Gsvolu("TS11","TUBE",idtmed[6],dm,3);
 645
 646   // 11->10->9->TIFC
 647
 648   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
 649   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
 650
 651   gMC->Gspos("TSA9",1,"TIFC",0.,0.,0.,0,"ONLY");
 652
 653   // daughter volumes - outer parts (reinforced)
 654
 655   // Tpc Sandwich 12 -Tedlar
 656
 657   dm[0]=77.0524;
 658   dm[1]=79.2;
 659   dm[2]=82.05;
 660
 661   gMC->Gsvolu("TS12","TUBE",idtmed[9],dm,3);
 662
 663   // Tpc Sandwich 13 - fiber glass (G10)
 664
 665   dm[0] += 3.8e-3;
 666   dm[1] -= 3.8e-3;
 667
 668   gMC->Gsvolu("TS13","TUBE",idtmed[12],dm,3);
 669
 670   // Tpc Sandwich 14 - NOMEX
 671
 672   dm[0] += 0.07;
 673   dm[1] -= 0.07;
 674
 675   gMC->Gsvolu("TS14","TUBE",idtmed[6],dm,3);
 676
 677   // 14->13->12->TIFC
 678
 679   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
 680   gMC->Gspos("TS13",1,"TS12",0.,0.,0.,0,"ONLY");
 681
 682   gMC->Gspos("TS12",1,"TIFC",0.,0.,170.05,0,"ONLY");
 683   gMC->Gspos("TS12",2,"TIFC",0.,0.,-170.05,0,"ONLY");
 684
 685   // place this inside the inner insulator
 686
 687   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
 688
 689   // and now in the TPC...
 690
 691   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 692
 693   //---------------------------------------------------------
 694   // Tpc Inner Containment vessel - Cones
 695   //---------------------------------------------------------
 696
 697   dm[0]=0.;
 698   dm[1]=360.;
 699   dm[2]=8.;
 700
 701   //
 702
 703   dm[3]=71.8;
 704   dm[4]=56.9;
 705   dm[5]=59.4;
 706
 707   //
 708
 709   dm[6]=73.;
 710   dm[7]=56.9;
 711   dm[8]=59.4;
 712
 713   //
 714
 715   dm[9]=73.;
 716   dm[10]=56.9;
 717   dm[11]=61.2;
 718
 719   //
 720
 721   dm[12]=73.3;
 722   dm[13]=56.9;
 723   dm[14]=61.2;
 724
 725   //
 726
 727   dm[15]=73.3;
 728   dm[16]=60.9;
 729   dm[17]=61.2;
 730
 731   //
 732
 733   dm[18]=253.6;
 734   dm[19]=65.6;
 735   dm[20]=65.9;
 736
 737   //
 738
 739   dm[21]=253.6;
 740   dm[22]=65.6;
 741   dm[23]=74.6;
 742
 743   //
 744
 745   dm[24]=256.6;
 746   dm[25]=65.6;
 747   dm[26]=74.6;
 748
 749   gMC->Gsvolu("TICC","PCON",idtmed[4],dm,27);
 750
 751   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
 752
 753   // reflection matrix
 754
 755   theta1 = 90.;
 756   phi1   = 0.;
 757   theta2 = 90.;
 758   phi2   = 270.;
 759   theta3 = 180.;
 760   phi3   = 0.;
 761
 762   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 763
 764   gMC->Gspos("TICC",1,"TPC ",0.,0.,0.,0,"ONLY");
 765   gMC->Gspos("TICC",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 766
 767
 768   //---------------------------------------------------------
 769   // Tpc Inner Containment vessel - Middle part -Al
 770   //---------------------------------------------------------
 771
 772   dm[0]=0.;
 773   dm[1]=360.;
 774   dm[2]=6.;
 775
 776   //
 777
 778   dm[3]=-71.6;
 779   dm[4]=60.2;
 780   dm[5]=61.2;
 781
 782   //
 783
 784   dm[6]=-69.1;
 785   dm[7]=60.2;
 786   dm[8]=61.2;
 787
 788   //
 789
 790   dm[9]=-69.1;
 791   dm[10]=60.6224;
 792   dm[11]=61.2;
 793
 794   //
 795
 796   dm[12]=69.1;
 797   dm[13]=60.6224;
 798   dm[14]=61.2;
 799
 800   //
 801
 802   dm[15]=69.1;
 803   dm[16]=60.2;
 804   dm[17]=61.2;
 805
 806   //
 807
 808   dm[18]=71.6;
 809   dm[19]=60.2;
 810   dm[20]=61.2;
 811
 812   gMC->Gsvolu("TICM","PCON",idtmed[4],dm,21);
 813
 814   // Tpc Sandwich 15 - Al
 815
 816   dm[0]=60.6224;
 817   dm[1]=61.2;
 818   dm[2]=70.1;
 819
 820   gMC->Gsvolu("TS15","TUBE",idtmed[4],dm,3);
 821
 822   // Tpc Sandwich 16 -  epoxy glue
 823
 824   dm[0] += 5.e-3;
 825   dm[1] -= 5.e-3;
 826
 827   gMC->Gsvolu("TS16","TUBE",idtmed[14],dm,3);
 828
 829   // Tpc Sandwich 17 - Tedlar
 830
 831   dm[0] += 0.01;
 832   dm[1] -= 0.01;
 833
 834   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
 835
 836   // Tpc Sandwich 18 - carbon fiber
 837
 838   dm[0] += 3.8e-3;
 839   dm[1] -= 3.8e-3;
 840
 841   gMC->Gsvolu("TS18","TUBE",idtmed[15],dm,3);
 842
 843   // Tpc Sandwich 19 - Nomex
 844
 845   dm[0] += 0.02;
 846   dm[1] -= 0.02;
 847
 848   gMC->Gsvolu("TS19","TUBE",idtmed[6],dm,3);
 849
 850   // 19->18->17->16->15-> TICM
 851
 852   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY");
 853   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
 854   gMC->Gspos("TS17",1,"TS16",0.,0.,0.,0,"ONLY");
 855   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
 856
 857   gMC->Gspos("TS15",1,"TICM ",0.,0.,0.,0,"ONLY");
 858
 859
 860   // TPc inner cont. vessel Joints
 861
 862   dm[0]=60.2;
 863   dm[1]=61.2;
 864   dm[2]=0.5;
 865
 866   gMC->Gsvolu("TPJ1","TUBE",idtmed[4],dm,3);
 867
 868   gMC->Gspos("TPJ1",1,"TPC ",0.,0.,72.3,0,"ONLY");
 869   gMC->Gspos("TPJ1",2,"TPC ",0.,0.,-72.3,0,"ONLY");
 870
 871   //
 872
 873   dm[0]=0.;
 874   dm[1]=360.;
 875   dm[2]=4.;
 876
 877   //
 878
 879   dm[3]=70.8;
 880   dm[4]=58.4;
 881   dm[5]=60.1;
 882
 883   //
 884
 885   dm[6]=71.2;
 886   dm[7]=58.4;
 887   dm[8]=60.1;
 888
 889   //
 890
 891   dm[9]=71.2;
 892   dm[10]=58.4;
 893   dm[11]=59.4;
 894
 895   //
 896
 897   dm[12]=71.6;
 898   dm[13]=58.4;
 899   dm[14]=59.4;
 900
 901   gMC->Gsvolu("TPJ2","PCON",idtmed[4],dm,15);
 902
 903   gMC->Gspos("TPJ2",1,"TPC ",0.,0.,0.,0,"ONLY");
 904   gMC->Gspos("TPJ2",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 905
 906
 907
 908   // Tpc Inner Containment vessel Seal (Viton, I use Lexan for a time being)
 909
 910   dm[0]=58.4;
 911   dm[1]=61.2;
 912   dm[2]=0.1;
 913
 914   gMC->Gsvolu("TICS","TUBE",idtmed[14],dm,3);
 915
 916   gMC->Gspos("TICS",1,"TPC ",0.,0.,71.7,0,"ONLY");
 917   gMC->Gspos("TICS",2,"TPC ",0.,0.,-71.7,0,"ONLY");
 918
 919   // TICM -> TPC
 920
 921   gMC->Gspos("TICM",1,"TPC ",0.,0.,0.,0,"ONLY");
 922
 923   //
 924
 925   nRotMat++; // prepare for the next rotation matrix
 926
 927   //---------------------------------------------------------
 928   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
 929   //  and its daughters (HV membrane, rods, readout chambers)
 930   //---------------------------------------------------------
 931
 932   dm[0]= 79.2;
 933   dm[1]= 258.0;
 934   dm[2]= 253.6;
 935
 936   gMC->Gsvolu("TDGS","TUBE",idtmed[2],dm,3);
 937
 938   // sector opening angles
 939
 940   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
 941
 942   // sector angle shift
 943
 944   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
 945
 946   // number of sectors
 947
 948   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
 949   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
 950
 951   // All above parameters are identical for inner and outer
 952   // sectors. The distinction is kept for the historical reasons
 953   // and eventually will disappear.
 954
 955   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
 956   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
 957   Float_t space;
 958
 959   //-------------------------------------------------------------------------
 960   //   Tpc Inner Readout Chambers
 961   //-------------------------------------------------------------------------
 962
 963   dm[0]= 14.483;
 964   dm[1]= 23.3345;
 965   dm[2]= 1.6; // thickness
 966   dm[3]= 25.1;
 967
 968   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
 969
 970   // this volume will be positioned in the empty space
 971   // of the end-cap to avoid overlaps
 972
 973   dm[0]= 13.7305;
 974   dm[1]= 21.1895;
 975   dm[2]= 2.25;
 976   dm[3]= 21.15;
 977
 978   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
 979
 980
 981   //------------------------------------------------
 982   // Tpc Inner readout chamber Pad Plane
 983   //------------------------------------------------
 984
 985   dm[0]= 14.483;
 986   dm[1]= 23.3345;
 987   dm[2]= 0.5;
 988   dm[3]= 25.1;
 989
 990   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
 991
 992   //
 993
 994   dm[0] -= 1.218511934;
 995   dm[1] -= 1.218511934;
 996   dm[2] = 0.35;
 997
 998   gMC->Gsvolu("TIC3","TRD1",idtmed[1],dm,4);
 999
1000   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
1001
1002   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
1003
1004
1005   //----------------------------------------------
1006   // Tpc Readout Chambers Empty spaces - for both
1007   // inner and outer sectors
1008   //----------------------------------------------
1009
1010   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
1011
1012   // Inner sector - 4 spaces
1013
1014
1015   dm[3] = 4.7625;
1016   dm[0] = 12.472;
1017
1018   Float_t rr = 90.52;
1019   Float_t zz;
1020
1021   zz= -12.7875;
1022
1023   space = rr*tanAlpha-dm[0];
1024
1025   for(Int_t nsLow=0;nsLow<4;nsLow++){
1026
1027     rr += 9.525;
1028     dm[1]= rr*tanAlpha - space;
1029
1030     dm[2]=0.8;
1031
1032     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
1033
1034     //
1035
1036     dm[2] = 1.2;
1037
1038     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
1039
1040     rr += 0.4;
1041     dm[0] = rr*tanAlpha - space;
1042     zz += (0.4+9.525);
1043
1044   }
1045
1046   dm[0]= 12.472;
1047   // dm[1] - this is the dm[1] from the previous TRCE
1048   dm[2]= 1.05;
1049   dm[3]= 19.65;
1050
1051   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.2,0.,0,"ONLY",dm,4);
1052
1053   //
1054   // TPc Space for Connectors
1055   //
1056
1057   dm[0]= .3;
1058   dm[1]= .3;
1059   dm[2]= 4.5;
1060
1061   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
1062
1063   // TPC Connectors
1064
1065   dm[0]= .25;
1066   dm[1]= .15;
1067   dm[2]= 3.75;
1068
1069   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3);
1070
1071   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1072
1073   zz = -12.7875;
1074
1075
1076   Float_t alpha;
1077   Float_t astep;
1078
1079   // inner part of the inner sector - 2 x 20 holes
1080
1081   astep = 20.00096874/19.;
1082
1083   alpha = 10.00048437-astep;
1084
1085   Float_t x1,x2;
1086
1087     x1 = 13.31175725;
1088     x1 -= 0.996357832;
1089
1090     x2 = 15.06180253;
1091     x2 -= 1.163028812;
1092
1093   Int_t ncon;
1094
1095   for(ncon=0;ncon<20;ncon++){
1096
1097     phi1 = 0.;
1098     theta1 = 90.+alpha;
1099     phi2=90.;
1100     theta2 = 90.;
1101     phi3 = (alpha>0) ? 0. : 180.;
1102     theta3 = TMath::Abs(alpha);
1103
1104     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1105
1106
1107
1108     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1109     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1110
1111
1112     x1 -= 1.296357833;
1113     x2 -= 1.463028812;
1114
1115     alpha -= astep;
1116     nRotMat++;
1117
1118   }
1119
1120   // outer part of the inner sector - 2 x 25 holes
1121
1122    astep = 20.00096874/24.;
1123    alpha = 10.00048437-astep;
1124
1125    x1 = 16.81184781;
1126    x1 -= 1.016295986;
1127
1128    x2 = 18.5618931;
1129    x2 -= 1.150914854;
1130
1131   for(ncon=0;ncon<25;ncon++){
1132
1133     phi1 = 0.;
1134     theta1 = 90.+alpha;
1135     phi2=90.;
1136     theta2 = 90.;
1137     phi3 = (alpha>0) ? 0. : 180.;
1138     theta3 = TMath::Abs(alpha);
1139
1140     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1141
1142
1143
1144     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1145     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1146
1147
1148     x1 -= 1.316295986;
1149     x2 -= 1.450914854;
1150
1151     alpha -= astep;
1152     nRotMat++;
1153
1154   }
1155
1156   //--------------------------------------------------------------------------
1157   //  TPC Outer Readout Chambers
1158   //  this is NOT a final design
1159   //--------------------------------------------------------------------------
1160
1161   dm[0]= 23.3875;
1162   dm[1]= 43.524;
1163   dm[2]= 1.5; //thickness
1164   dm[3]= 57.1;
1165
1166   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1167
1168   //------------------------------------------------
1169   // Tpc Outer readout chamber Pad Plane
1170   //------------------------------------------------
1171
1172   dm[2]= 0.5;
1173
1174   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1175
1176   dm[0] -= 1.218511934;
1177   dm[1] -= 1.218511934;
1178   dm[2] = 0.35;
1179
1180   gMC->Gsvolu("TOC3","TRD1",idtmed[1],dm,4);
1181
1182   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1183
1184   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1185
1186   // empty space
1187
1188   dm[0]= 21.035;
1189   dm[1]= 38.7205;
1190   dm[2]= 0.7;
1191   dm[3]= 50.15;
1192
1193   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);
1194
1195   dm[0]= 22.2935;
1196   dm[1]= 40.5085;
1197   dm[2]= 2.25;
1198   dm[3]= 51.65;
1199
1200   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1201
1202   dm[0]= 21.35;
1203   dm[1]= 38.7205;
1204   dm[2]= 2.25;
1205   dm[3]= 50.15;
1206
1207   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1208
1209   //-----------------------------------------------
1210   // Tpc Services Support Wheel
1211   //-----------------------------------------------
1212
1213   dm[0]=0.;
1214   dm[1]=360.;
1215   dm[2]=18.;
1216   dm[3]=2.;
1217
1218   dm[4]= -5.;
1219   dm[5]= 77.017;
1220   dm[6]= 255.267;
1221
1222   dm[7]= 5.;
1223   dm[8]= dm[5];
1224   dm[9]= dm[6];
1225
1226   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1227
1228   // Tpc Services Wheel Cover
1229
1230   dm[4]= -0.5;
1231   dm[7]= 0.5;
1232
1233   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1234
1235   // Tpc Service wheel Cover Empty space
1236
1237   dm[0]= 10.99;
1238   dm[1]= 39.599;
1239   dm[2]= .5;
1240   dm[3]= 81.125;
1241
1242   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1243
1244   // Tpc services Wheel Empty Spaces
1245
1246   dm[0]= 13.18017507;
1247   dm[1]= 44.61045938;
1248   dm[2]= 4.;
1249   dm[3]= 89.125;
1250
1251   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1252
1253   // Tpc Services Wheel Bars
1254
1255   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1256
1257   // bars-> TWES
1258
1259   dm[2]= 4.;
1260   dm[3]= .4;
1261
1262   dm[0]= 13.8149522;
1263   dm[1]= 13.95601379;
1264
1265   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1266
1267   dm[0]= 43.83462067;
1268   dm[1]= 43.97568225;
1269
1270   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1271
1272   // TPc ELectronics - right now 30% X0 Si
1273
1274   dm[0]= 14.03813696;
1275   dm[1]= 43.3524075;
1276   dm[2]= 1.404;
1277   dm[3]= 83.125;
1278
1279   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1280   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1281
1282   //--------------------------------------------------------------------------
1283   //  End caps
1284   //--------------------------------------------------------------------------
1285
1286   // TPc Main Wheel - Al
1287
1288   dm[0]= 74.9;
1289   dm[1]= 264.4;
1290   dm[2]= 3.0;
1291
1292   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1293
1294   //--------------------------------------------------------------------------
1295   //  Tpc Empty Space for the Readout chambers
1296   //--------------------------------------------------------------------------
1297
1298   Float_t rLow= 86.2;
1299   Float_t rUp= 243.5;
1300   Float_t dR = 0.5*(rUp-rLow);
1301
1302   space= 1.5/cosAlpha; // wheel ribs are 3.0 cm wide
1303
1304   dm[0]= rLow*tanAlpha-space;
1305   dm[1]= rUp*tanAlpha-space;
1306   dm[2] = 3.0;
1307   dm[3]= dR;
1308
1309   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1310
1311   // TIC1->TESR
1312
1313   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1314
1315   // TOC1->TESR
1316
1317   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1318
1319   // Tpc Empty Space Bars - Al (daughters of TESR)
1320
1321   Float_t zBar;
1322
1323   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1324
1325   // lower bar
1326
1327   dm[0]= rLow*tanAlpha-space;
1328   dm[1]= 88.7*tanAlpha-space;
1329   dm[2]= 2.25;
1330   dm[3]= 1.275;
1331
1332   zBar = -dR+dm[3];
1333
1334   gMC->Gsposp("TESB",1,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1335
1336   // middle bar
1337
1338   dm[0]= 131.65*tanAlpha-space;
1339   dm[1]= 136.5*tanAlpha-space;
1340   dm[3]= 2.425;
1341
1342   zBar = -dR +131.65+dm[3]-rLow;
1343
1344   gMC->Gsposp("TESB",2,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1345
1346   // upper bar
1347
1348   dm[0]= 240.4*tanAlpha-space;
1349   dm[1]= rUp*tanAlpha-space;
1350   dm[3]= 1.55;
1351
1352   zBar = dR-dm[3];
1353
1354   gMC->Gsposp("TESB",3,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1355
1356   //  positioning of the empty spaces into the main wheel
1357
1358   Float_t rCenter,xc,yc;
1359   Float_t rInner,rOuter; // center of the inner and outer chamber
1360
1361   rCenter = rLow+dR;
1362
1363   rInner = 108.07;
1364   rOuter = 190.68;
1365
1366
1367   for(Int_t ns=0; ns<nInnerSector;ns++){
1368
1369     phi1 = ns * innerOpenAngle + innerAngleShift;
1370     phi1 *= kRaddeg; // in degrees
1371
1372     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1373
1374     if (phi1 > 360.) phi1 -= 360.;
1375
1376     theta1 = 90.;
1377     phi2   = 90.;
1378     theta2 = 180.;
1379     phi3   = ns * innerOpenAngle + innerAngleShift;
1380     phi3 *= kRaddeg; // in degrees
1381
1382     phi3 = (Float_t)TMath::Nint(phi3);
1383
1384     if(phi3 > 360.) phi3 -= 360.;
1385
1386     theta3 = 90.;
1387
1388     // "holes"->End plate
1389
1390     xc = rCenter*TMath::Cos(phi3*kDegrad);
1391     yc = rCenter*TMath::Sin(phi3*kDegrad);
1392
1393     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1394
1395     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1396
1397     // TSCE->TSWC (services wheel volumes)
1398
1399     xc = 166.142*TMath::Cos(phi3*kDegrad);
1400     yc = 166.142*TMath::Sin(phi3*kDegrad);
1401
1402     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1403     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1404
1405
1406     // readout chambers->TDGS (drift gas)
1407
1408     xc = rInner*TMath::Cos(phi3*kDegrad);
1409     yc = rInner*TMath::Sin(phi3*kDegrad);
1410
1411     gMC->Gspos("TIRC",ns+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+1,"TDGS",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1417
1418     nRotMat++;
1419
1420     theta2 = 0.; // reflection
1421
1422     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1423
1424     xc = rInner*TMath::Cos(phi3*kDegrad);
1425     yc = rInner*TMath::Sin(phi3*kDegrad);
1426
1427     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGS",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1428
1429     xc = rOuter*TMath::Cos(phi3*kDegrad);
1430     yc = rOuter*TMath::Sin(phi3*kDegrad);
1431
1432     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGS",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1433
1434     nRotMat++;
1435
1436   }
1437   // TPMW->TPC
1438
1439   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1440   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[0],"ONLY");
1441
1442   //---------------------------------------------------------
1443   //  Tpc High Voltage Membrane - 100 microns of mylar
1444   //---------------------------------------------------------
1445
1446   dm[0]=82.8;
1447   dm[1]=252.;
1448   dm[2]=0.005;
1449
1450   gMC->Gsvolu("THVM","TUBE",idtmed[8],dm,3);
1451
1452   gMC->Gspos("THVM",1,"TDGS",0.,0.,0.,0,"ONLY");
1453
1454   // Tpc High Voltage membrane Holders
1455
1456   gMC->Gsvolu("THVH","TUBE",idtmed[4],dm,0);
1457
1458
1459
1460   // inner
1461
1462   dm[0]=79.3;
1463   dm[1]=82.8;
1464   dm[2]=0.2;
1465
1466   gMC->Gsposp("THVH",1,"TDGS",0.,0.,0.,0,"ONLY",dm,3);
1467
1468   // outer
1469
1470   dm[0]= 252.;
1471   dm[1]= 257.9;
1472   dm[2]= 0.4;
1473
1474   gMC->Gsposp("THVH",2,"TDGS",0.,0.,0.,0,"ONLY",dm,3);
1475
1476   //----------------------------------------------------------
1477   // TPc Support Rods - MAKROLON
1478   //----------------------------------------------------------
1479
1480   dm[0]= 0.9;
1481   dm[1]= 1.2;
1482
1483   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,0); // inner and outer rods differ
1484
1485
1486   for(Int_t nrod=0;nrod<18;nrod++){
1487     Float_t angle=innerOpenAngle*(Float_t)nrod;
1488
1489     xc=81.5*TMath::Cos(angle);
1490     yc=81.5*TMath::Sin(angle);
1491
1492     dm[2]=126.7;
1493
1494     gMC->Gsposp("TPSR",nrod+1,"TDGS",xc,yc,126.9,0,"ONLY",dm,3);
1495     gMC->Gsposp("TPSR",nrod+19,"TDGS",xc,yc,-126.9,0,"ONLY",dm,3);
1496
1497     dm[2]=126.6;
1498
1499     xc=254.25*TMath::Cos(angle);
1500     yc=254.25*TMath::Sin(angle);
1501
1502     // rod number 54 contans the HV cable
1503
1504     if(nrod<17) {
1505       gMC->Gsposp("TPSR",nrod+37,"TDGS",xc,yc,127.,0,"ONLY",dm,3);
1506       gMC->Gsposp("TPSR",nrod+54,"TDGS",xc,yc,-127.,0,"ONLY",dm,3);
1507     }
1508
1509   }
1510
1511   //----------------------------------------------------------
1512   // Tpc High Voltage Rod - MAKROLON + Copper cable
1513   //----------------------------------------------------------
1514
1515   // rod with cable (Left)
1516
1517   dm[0]=0.;
1518   dm[1]=2.25;
1519   dm[2]=126.6;
1520
1521   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1522
1523   // HV cable
1524
1525   dm[0]=0.;
1526   dm[1]=0.3;
1527   dm[2]=126.6;
1528
1529   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);
1530
1531   // empty space
1532
1533   dm[0]=0.3;
1534   dm[1]=1.;
1535   dm[2]=126.6;
1536
1537   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1538
1539   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1540   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1541
1542   // rod without cable
1543
1544   dm[0]=1.8;
1545   dm[1]=2.25;
1546   dm[2]=126.6;
1547
1548   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1549
1550   gMC->Gspos("THVL",1,"TDGS",xc,yc,-127.,0,"ONLY");
1551   gMC->Gspos("THVR",1,"TDGS",xc,yc,127.,0,"ONLY");
1552
1553   gMC->Gspos("TDGS",1,"TPC ",0.,0.,0.,0,"ONLY");
1554
1555   // services wheel cover -> wheel
1556
1557
1558   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1559   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1560
1561
1562   // put the wheel into the TPC
1563
1564   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1565   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1566
1567   //
1568
1569   gMC->Gsord("TPMW",6);
1570   gMC->Gsord("TSSW",6);
1571   gMC->Gsord("TSWC",6);
1572
1573   // put the TPC into ALIC (main mother volume)
1574
1575   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1576
1577
1578 } // end of function
1579
1580 //_____________________________________________________________________________
1581 void AliTPCv3::DrawDetector()
1582 {
1583   //
1584   // Draw a shaded view of the Time Projection Chamber version 3
1585   //
1586
1587
1588   // Set everything unseen
1589   gMC->Gsatt("*", "seen", -1);
1590   //
1591   // Set ALIC mother transparent
1592   gMC->Gsatt("ALIC","SEEN",0);
1593   //
1594   // Set the volumes visible
1595   //
1596
1597   gMC->Gsatt("TPC ","SEEN",0);
1598   gMC->Gsatt("TOIN","SEEN",1);
1599   gMC->Gsatt("TOIN","COLO",7);
1600   gMC->Gsatt("TOCV","SEEN",1);
1601   gMC->Gsatt("TOCV","COLO",4);
1602   gMC->Gsatt("TSA1","SEEN",0);
1603   gMC->Gsatt("TSA2","SEEN",0);
1604   gMC->Gsatt("TSA3","SEEN",0);
1605   gMC->Gsatt("TSA4","SEEN",0);
1606   gMC->Gsatt("TSA5","SEEN",0);
1607   gMC->Gsatt("TOFC","SEEN",1);
1608   gMC->Gsatt("TOFC","COLO",4);
1609   gMC->Gsatt("TSA6","SEEN",0);
1610   gMC->Gsatt("TSA7","SEEN",0);
1611   gMC->Gsatt("TSA8","SEEN",0);
1612   gMC->Gsatt("TIIN","SEEN",1);
1613   gMC->Gsatt("TIIN","COLO",7);
1614   gMC->Gsatt("TII1","SEEN",0);
1615   gMC->Gsatt("TIFC","SEEN",1);
1616   gMC->Gsatt("TIFC","COLO",4);
1617   gMC->Gsatt("TSA9","SEEN",0);
1618   gMC->Gsatt("TS10","SEEN",0);
1619   gMC->Gsatt("TS11","SEEN",0);
1620   gMC->Gsatt("TS12","SEEN",0);
1621   gMC->Gsatt("TS13","SEEN",0);
1622   gMC->Gsatt("TS14","SEEN",0);
1623   gMC->Gsatt("TICC","SEEN",0);
1624   gMC->Gsatt("TICM","SEEN",0);
1625   gMC->Gsatt("TS15","SEEN",0);
1626   gMC->Gsatt("TS16","SEEN",0);
1627   gMC->Gsatt("TS17","SEEN",0);
1628   gMC->Gsatt("TS18","SEEN",0);
1629   gMC->Gsatt("TS19","SEEN",0);
1630   gMC->Gsatt("TPJ1","SEEN",0);
1631   gMC->Gsatt("TPJ2","SEEN",0);
1632   gMC->Gsatt("TICS","SEEN",0);
1633   gMC->Gsatt("TDGS","SEEN",0);
1634   gMC->Gsatt("TIRC","SEEN",0);
1635   gMC->Gsatt("TIC1","SEEN",1);
1636   gMC->Gsatt("TIPP","SEEN",0);
1637   gMC->Gsatt("TIC3","SEEN",0);
1638   gMC->Gsatt("TRCE","SEEN",0);
1639   gMC->Gsatt("TPSC","SEEN",0);
1640   gMC->Gsatt("TPCC","SEEN",0);
1641   gMC->Gsatt("TORC","SEEN",0);
1642   gMC->Gsatt("TOPP","SEEN",0);
1643   gMC->Gsatt("TOC3","SEEN",0);
1644   gMC->Gsatt("TOC1","SEEN",1);
1645   gMC->Gsatt("TSSW","SEEN",1);
1646   gMC->Gsatt("TSWC","SEEN",1);
1647   gMC->Gsatt("TSSW","COLO",3);
1648   gMC->Gsatt("TSWC","COLO",3);
1649   gMC->Gsatt("TSCE","COLO",6);
1650   gMC->Gsatt("TSCE","SEEN",1);
1651   gMC->Gsatt("TWES","SEEN",0);
1652   gMC->Gsatt("TSWB","SEEN",0);
1653   gMC->Gsatt("TPEL","SEEN",0);
1654   gMC->Gsatt("TPMW","SEEN",1);
1655   gMC->Gsatt("TESR","SEEN",1);
1656   gMC->Gsatt("TPMW","COLO",12);
1657   gMC->Gsatt("TIC1","COLO",5);
1658   gMC->Gsatt("TOC1","COLO",5);
1659   gMC->Gsatt("TESB","SEEN",0);
1660   gMC->Gsatt("THVM","SEEN",1);
1661   gMC->Gsatt("THVM","COLO",11);
1662   gMC->Gsatt("THVH","SEEN",0);
1663   gMC->Gsatt("TPSR","SEEN",0);
1664   gMC->Gsatt("THVL","SEEN",0);
1665   gMC->Gsatt("THVC","SEEN",0);
1666   gMC->Gsatt("THVE","SEEN",0);
1667   gMC->Gsatt("THVR","SEEN",0);
1668
1669   //
1670   gMC->Gdopt("hide", "on");
1671   gMC->Gdopt("shad", "on");
1672   gMC->Gsatt("*", "fill", 7);
1673   gMC->SetClipBox(".");
1674   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1675   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1676   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1677   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1678   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1679   gMC->DefaultRange();
1680   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1681   gMC->Gdhead(1111, "Time Projection Chamber");
1682   gMC->Gdman(18, 4, "MAN");
1683   gMC->Gdopt("hide","off");
1684 }
1685
1686 //_____________________________________________________________________________
1687 void AliTPCv3::CreateMaterials()
1688 {
1689   //
1690   // Define materials for version 2 of the Time Projection Chamber
1691   //
1692
1693
1694   //
1695   AliTPC::CreateMaterials();
1696 }
1697
1698 //_____________________________________________________________________________
1699 void AliTPCv3::Init()
1700 {
1701   //
1702   // Initialises version 3 of the TPC after that it has been built
1703   //
1704   Int_t *idtmed = fIdtmed->GetArray();
1705
1706   AliTPC::Init();
1707
1708   fIdSens=gMC->VolId("TDGS"); // drift gas as a sensitive volume
1709
1710   gMC->SetMaxNStep(30000); // max. number of steps increased
1711
1712   gMC->Gstpar(idtmed[2],"LOSS",5);
1713
1714   printf("%s: *** TPC version 3 initialized***\n",ClassName());
1715
1716   printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
1717
1718   // printf("*** TPC version 3 initialized ***\n");
1719   // printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
1720
1721   //
1722
1723 }
1724
1725 //_____________________________________________________________________________
1726 void AliTPCv3::StepManager()
1727 {
1728   //
1729   // Called for every step in the Time Projection Chamber
1730   //
1731
1732   //
1733   // parameters used for the energy loss calculations
1734   //
1735   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1736   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1737   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1738
1739
1740   const Float_t kbig = 1.e10;
1741
1742   Int_t id,copy;
1743   TLorentzVector pos;
1744   Float_t hits[4];
1745   Int_t vol[2];
1746
1747   vol[1]=0;
1748   vol[0]=0;
1749
1750   //
1751
1752   gMC->SetMaxStep(kbig);
1753
1754   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1755
1756   Float_t charge = gMC->TrackCharge();
1757
1758   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1759
1760
1761   id=gMC->CurrentVolID(copy);
1762
1763   // Check the sensitive volume
1764
1765   if (id != fIdSens) return;
1766
1767   //
1768   //  charged particle is in the sensitive volume
1769   //
1770
1771   if(gMC->TrackStep() > 0) {
1772
1773
1774     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1775     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1776
1777     gMC->TrackPosition(pos);
1778     hits[0]=pos[0];
1779     hits[1]=pos[1];
1780     hits[2]=pos[2];
1781
1782     //
1783     // check the selected side of the TPC
1784     //
1785
1786     if(fSide && fSide*hits[2]<=0.) return;
1787
1788     hits[3]=(Float_t)nel;
1789
1790     // Add this hit
1791
1792     AddHit(gAlice->CurrentTrack(), vol,hits);  //MI change
1793
1794   }
1795
1796   // Stemax calculation for the next step
1797
1798   Float_t pp;
1799   TLorentzVector mom;
1800   gMC->TrackMomentum(mom);
1801   Float_t ptot=mom.Rho();
1802   Float_t betaGamma = ptot/gMC->TrackMass();
1803
1804   Int_t pid=gMC->TrackPid();
1805   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1806     {
1807       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1808     }
1809   else
1810     {
1811       betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3);
1812       pp=kprim*BetheBloch(betaGamma);
1813       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1814     }
1815
1816   Double_t rnd = gMC->GetRandom()->Rndm();
1817
1818   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1819
1820 }
1821
1822 //_____________________________________________________________________________
1823 Float_t AliTPCv3::BetheBloch(Float_t bg)
1824 {
1825   //
1826   // Bethe-Bloch energy loss formula
1827   //
1828   const Double_t kp1=0.76176e-1;
1829   const Double_t kp2=10.632;
1830   const Double_t kp3=0.13279e-4;
1831   const Double_t kp4=1.8631;
1832   const Double_t kp5=1.9479;
1833
1834   Double_t dbg = (Double_t) bg;
1835
1836   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1837
1838   Double_t aa = TMath::Power(beta,kp4);
1839   Double_t bb = TMath::Power(1./dbg,kp5);
1840
1841   bb=TMath::Log(kp3+bb);
1842
1843   return ((Float_t)((kp2-aa-bb)*kp1/aa));
1844 }