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