TPC/AliTPCv2.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 1.35  2001/04/24 11:17:33  kowal2
  19 New TPC geometry.
  20
  21 Revision 1.34  2001/04/23 10:20:18  hristov
  22 Constant casted to avoid ambiguity
  23
  24 Revision 1.33  2001/04/20 08:16:47  kowal2
  25 Protection against too small betaGamma. Thanks to Ivana and Yves.
  26
  27 Revision 1.32  2001/03/13 13:07:34  kowal2
  28 Corrected bug in the TPC mother volume geometry.
  29 Thanks to A. Morsch
  30
  31 Revision 1.31  2000/11/30 11:48:50  kowal2
  32 TLorentzVector.h adde to satisfy the latest changes by Federico
  33
  34 Revision 1.30  2000/11/14 10:48:57  kowal2
  35 Correct material used for TSA4. Thanks to J. Barbosa.
  36
  37 Revision 1.29  2000/11/06 17:24:10  kowal2
  38 Corrected bug in the outer containment vessel and
  39 the outer field cage geometry.
  40 Thanks to J. Barbosa.
  41
  42 Revision 1.28  2000/11/02 16:55:24  kowal2
  43 Corrected bug in the inner containment vessel geometry.
  44 Thanks to J. Belikov
  45
  46 Revision 1.27  2000/11/02 07:24:11  kowal2
  47 Correction in the TPC geometry.
  48 Changes due to the new hit structure.
  49
  50 Revision 1.26  2000/10/05 16:16:29  kowal2
  51 Corrections of the hit recording algorithm.
  52
  53 Revision 1.25  2000/10/02 21:28:18  fca
  54 Removal of useless dependecies via forward declarations
  55
  56 Revision 1.24  2000/08/28 10:02:30  kowal2
  57 Corrected bug in the StepManager
  58
  59 Revision 1.23  2000/07/10 20:57:39  hristov
  60 Update of TPC code and macros by M.Kowalski
  61
  62 Revision 1.22  2000/06/30 12:07:50  kowal2
  63 Updated from the TPC-PreRelease branch
  64
  65 Revision 1.21.2.4  2000/06/26 07:39:42  kowal2
  66 Changes to obey the coding rules
  67
  68 Revision 1.21.2.3  2000/06/25 08:38:41  kowal2
  69 Splitted from AliTPCtracking
  70
  71 Revision 1.21.2.2  2000/06/16 12:58:13  kowal2
  72 Changed parameter settings
  73
  74 Revision 1.21.2.1  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 1.21  2000/05/15 10:00:30  kowal2
  80 Corrected bug in the TPC geometry, thanks to Ivana Hrivnacova
  81
  82 Revision 1.20  2000/04/17 09:37:33  kowal2
  83 removed obsolete AliTPCDigitsDisplay.C
  84
  85 Revision 1.19.8.2  2000/04/10 08:31:52  kowal2
  86
  87 Different geometry for different sectors
  88 Updated readout chambers
  89 Some modifications to StepManager by J.Belikov
  90
  91 Revision 1.19.8.1  2000/04/10 07:56:53  kowal2
  92 Not used anymore - removed
  93
  94 Revision 1.19  1999/11/04 17:28:07  fca
  95 Correct barrel part of HV Degrader
  96
  97 Revision 1.18  1999/10/14 16:52:08  fca
  98 Only use PDG codes and not GEANT ones
  99
 100 Revision 1.17  1999/10/08 06:27:23  fca
 101 Corrected bug in the HV degrader geometry, thanks to G.Tabary
 102
 103 Revision 1.16  1999/10/04 13:39:54  fca
 104 Correct array index problem
 105
 106 Revision 1.15  1999/09/29 09:24:34  fca
 107 Introduction of the Copyright and cvs Log
 108
 109 */
 110
 111 //
 112 ///////////////////////////////////////////////////////////////////////////////
 113 //                                                                           //
 114 //  Time Projection Chamber version 2 -- detailed TPC and slow simulation    //
 115 //                                                                           //
 116 //Begin_Html
 117 /*
 118 <img src="picts/AliTPCv2Class.gif">
 119 */
 120 //End_Html
 121 //                                                                           //
 122 //                                                                           //
 123 ///////////////////////////////////////////////////////////////////////////////
 124 #include <stdlib.h>
 125
 126 #include <TMath.h>
 127
 128 #include "AliTPCv2.h"
 129 #include "AliTPCDigitsArray.h"
 130 #include "AliRun.h"
 131 #include "AliMC.h"
 132 #include "AliConst.h"
 133 #include "AliPDG.h"
 134 #include "AliTPCParam.h"
 135 #include "AliTPCParamSR.h"
 136 #include "AliTPCTrackHits.h"
 137 #include "TLorentzVector.h"
 138
 139
 140 ClassImp(AliTPCv2)
 141
 142 //_____________________________________________________________________________
 143 AliTPCv2::AliTPCv2(const char *name, const char *title) :
 144   AliTPC(name, title)
 145 {
 146   //
 147   // Standard constructor for Time Projection Chamber version 2
 148   //
 149   fIdSens=0;
 150   fIdLSec=0;
 151   fIdUSec=0;
 152
 153   SetBufferSize(128000);
 154
 155   SetGasMixt(2,20,10,-1,0.9,0.1,0.); // Ne-CO2 90-10
 156
 157   // Default sectors
 158
 159   SetSecAL(4);
 160   SetSecAU(4);
 161   SetSecLows(1,  2,  3, 19, 20, 21);
 162   SetSecUps(37, 38, 39, 37+18, 38+18, 39+18, -1, -1, -1, -1, -1, -1);
 163   SetSens(1); // sensitive strips set
 164
 165   if (fTPCParam)
 166      fTPCParam->Write(fTPCParam->GetTitle());
 167 }
 168
 169 //_____________________________________________________________________________
 170 void AliTPCv2::CreateGeometry()
 171 {
 172   //
 173   // Create the geometry of Time Projection Chamber version 2
 174   //
 175   //Begin_Html
 176   /*
 177     <img src="picts/AliTPC.gif">
 178   */
 179   //End_Html
 180   //Begin_Html
 181   /*
 182     <img src="picts/AliTPCv2Tree.gif">
 183   */
 184   //End_Html
 185
 186
 187   Int_t *idtmed = fIdtmed->GetArray();
 188
 189   Float_t dm[50];
 190   Int_t idrotm[120];
 191
 192   Int_t nRotMat = 0;
 193
 194   Int_t i,ifl1=0;
 195
 196   // number of sectors
 197
 198   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
 199   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
 200
 201   // ---------------------------------------------------
 202   //        sector specification check
 203   // ---------------------------------------------------
 204   if (fSecAL >= 0) {
 205     ifl1 = 0;
 206
 207     for (i = 0; i < 6; ++i) {
 208       if (fSecLows[i] >= 0 && fSecLows[i] < 2*nInnerSector) {
 209         ifl1 = 1;
 210         printf("*** SECTOR %d selected\n",fSecLows[i]);
 211       }
 212     }
 213
 214   } else {
 215     printf("*** ALL LOWER SECTORS SELECTED ***\n");
 216     ifl1 = 1;
 217   }
 218
 219   if (ifl1 == 0) {
 220     printf("*** ERROR: AT LEAST ONE LOWER SECTOR MUST BE SPECIFIED ***\n");
 221     printf("!!! PROGRAM STOPPED !!!\n");
 222     exit(1);
 223   }
 224
 225   if (fSecAU >= 0) {
 226
 227     for (i = 0; i < 12; ++i) {
 228       if (fSecUps[i] > 2*nInnerSector-1 &&
 229           fSecUps[i] < 2*(nInnerSector+nOuterSector)) {
 230         printf("*** SECTOR %d selected\n",fSecUps[i]);
 231       }
 232     }
 233
 234   } else {
 235     printf("*** ALL UPPER SECTORS SELECTED ***\n");
 236   }
 237
 238
 239
 240   //--------------------------------------------------------------------
 241
 242   //
 243   //  Mother volume TPC (Air) - all volumes will be positioned in it
 244   //
 245
 246   dm[0]=0.;
 247   dm[1]=360.;
 248   dm[2]=8.;
 249
 250   //
 251
 252   dm[3]=-283.7;
 253   dm[4]=65.6;
 254   dm[5]=278.;
 255
 256   //
 257
 258   dm[6]=-253.6;
 259   dm[7]=65.6;
 260   dm[8]=278.;
 261
 262   //
 263
 264   dm[9]=-73.3;
 265   dm[10]=60.9;
 266   dm[11]=278.;
 267
 268   //
 269
 270   dm[12]=-73.3;
 271   dm[13]=56.9;
 272   dm[14]=278.;
 273
 274   //
 275
 276   dm[15]=73.3;
 277   dm[16]=56.9;
 278   dm[17]=278.;
 279
 280   //
 281
 282   dm[18]=73.3;
 283   dm[19]=60.9;
 284   dm[20]=278.;
 285
 286   //
 287
 288   dm[21]=253.6;
 289   dm[22]=65.6;
 290   dm[23]=278.;
 291
 292   //
 293
 294   dm[24]=283.7;
 295   dm[25]=65.6;
 296   dm[26]=278.;
 297
 298   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,27);
 299
 300   // outer part
 301
 302   //-------------------------------------------------------------------
 303   //   Tpc Outer INsulator (CO2) - contains cont. vessel and field cage
 304   //-------------------------------------------------------------------
 305
 306   dm[0]= 0.;
 307   dm[1]= 360.;
 308   dm[2]= 6.;
 309
 310   //
 311
 312   dm[3]=-253.6;
 313   dm[4]=258.;
 314   dm[5]=275.5;
 315
 316   //
 317
 318   dm[6]=-250.6;
 319   dm[7]=258.;
 320   dm[8]=275.5;
 321
 322   //
 323
 324   dm[9]=-250.6;
 325   dm[10]=258.;
 326   dm[11]=278.;
 327
 328   //
 329
 330   dm[12]=253.6;
 331   dm[13]=258.;
 332   dm[14]=278.;
 333
 334   //
 335
 336   dm[15]=253.6;
 337   dm[16]=264.8;
 338   dm[17]=278.;
 339
 340   //
 341
 342   dm[18]=256.6;
 343   dm[19]=264.8;
 344   dm[20]=278.;
 345
 346   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
 347
 348   //----------------------------------------------------------------
 349   // Tpc Outer Contaiment Vessel
 350   //  mother volume - Al, daughters - composite (sandwich)
 351   //----------------------------------------------------------------
 352
 353   dm[0]=0.;
 354   dm[1]=360.;
 355   dm[2]=6.;
 356
 357   //
 358
 359   dm[3]=-250.6;
 360   dm[4]=270.4;
 361   dm[5]=278.;
 362
 363   //
 364
 365   dm[6]=-247.6;
 366   dm[7]=270.4;
 367   dm[8]=278.;
 368
 369   //
 370
 371   dm[9]=-247.6;
 372   dm[10]=274.81;
 373   dm[11]=278.;
 374
 375   //
 376
 377   dm[12]=253.6;
 378   dm[13]=274.81;
 379   dm[14]=278.;
 380
 381   //
 382
 383   dm[15]=253.6;
 384   dm[16]=264.8;
 385   dm[17]=278.;
 386
 387   //
 388
 389   dm[18]=256.6;
 390   dm[19]=264.8;
 391   dm[20]=278.;
 392
 393   gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,21);
 394
 395   // Daughter volumes - sandwich
 396
 397   // Tpc SAndwich 1 - Al
 398
 399   dm[0]=274.81;
 400   dm[1]=278.;
 401   dm[2]=252.1;
 402
 403   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
 404
 405   // Tpc SAndwich 2 - epoxy glue (I use Lexan)
 406
 407   dm[0] += 5.e-3;
 408   dm[1] -= 5.e-3;
 409
 410   gMC->Gsvolu("TSA2","TUBE",idtmed[14],dm,3);
 411
 412   // Tpc SAndwich 3 - Tedlar
 413
 414   dm[0] += 0.01;
 415   dm[1] -= 0.01;
 416
 417   gMC->Gsvolu("TSA3","TUBE",idtmed[9],dm,3);
 418
 419
 420   // Tpc SAndwich 4 - fiber glass (G10)
 421
 422   dm[0] += 5.e-3;
 423   dm[1] -= 5.e-3;
 424
 425   gMC->Gsvolu("TSA4","TUBE",idtmed[12],dm,3);
 426
 427   // Tpc SAndwich 5 - NOMEX honeycomb
 428
 429   dm[0] += 0.075;
 430   dm[1] -= 0.075;
 431
 432   gMC->Gsvolu("TSA5","TUBE",idtmed[6],dm,3);
 433
 434   // 5->4->3->2->1->TCOV
 435
 436
 437   gMC->Gspos("TSA5",1,"TSA4",0.,0.,0.,0,"ONLY");
 438   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
 439   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
 440   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");
 441
 442   gMC->Gspos("TSA1",1,"TOCV",0.,0.,3.,0,"ONLY");
 443
 444   // TCOV-> TOIN
 445
 446   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
 447
 448   //-------------------------------------------------------
 449   //  Tpc Outer Field Cage
 450   //  mother volume - Al, daughters - composite (sandwich)
 451   //-------------------------------------------------------
 452
 453   dm[0]=0.;
 454   dm[1]=360.;
 455   dm[2]=6.;
 456
 457   //
 458
 459   dm[3]=-253.6;
 460   dm[4]=258.;
 461   dm[5]=275.5;
 462
 463   //
 464
 465   dm[6]=-250.6;
 466   dm[7]=258.;
 467   dm[8]=275.5;
 468
 469   //
 470
 471   dm[9]=-250.6;
 472   dm[10]=258.;
 473   dm[11]=260.05;
 474
 475   //
 476
 477   dm[12]=250.6;
 478   dm[13]=258.;
 479   dm[14]=260.05;
 480
 481   //
 482
 483   dm[15]=250.6;
 484   dm[16]=258.;
 485   dm[17]=275.5;
 486
 487   //
 488
 489   dm[18]=253.6;
 490   dm[19]=258.;
 491   dm[20]=275.5;
 492
 493   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
 494
 495   // Daughter volumes
 496
 497   // Tpc SAndwich 6 - Tedlar
 498
 499   dm[0]= 258.;
 500   dm[1]= 260.05;
 501   dm[2]= 252.1;
 502
 503   gMC->Gsvolu("TSA6","TUBE",idtmed[9],dm,3);
 504
 505   // Tpc SAndwich 7 - fiber glass
 506
 507   dm[0] += 5.e-3;
 508   dm[1] -= 5.e-3;
 509
 510   gMC->Gsvolu("TSA7","TUBE",idtmed[12],dm,3);
 511
 512
 513   // Tpc SAndwich 8 - NOMEX
 514
 515   dm[0] += 0.02;
 516   dm[1] -= 0.02;
 517
 518   gMC->Gsvolu("TSA8","TUBE",idtmed[6],dm,3);
 519
 520   // 8->7->6->TOFC
 521
 522   gMC->Gspos("TSA8",1,"TSA7",0.,0.,0.,0,"ONLY");
 523   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY");
 524   gMC->Gspos("TSA6",1,"TOFC",0.,0.,0.,0,"ONLY");
 525
 526   // TOFC->TOIN
 527
 528   gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
 529
 530   // TOIN->TPC
 531
 532   gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 533
 534   // inner part
 535
 536   //--------------------------------------------------------------------
 537   // Tpc Inner INsulator (CO2) - inner f.c. will be placed there
 538   // Inner containment vessel will be placed directly in the TPC
 539   //--------------------------------------------------------------------
 540
 541   dm[0]=0.;
 542   dm[1]=360.;
 543   dm[2]=4.;
 544
 545   //
 546
 547   dm[3]=-253.6;
 548   dm[4]=65.9;
 549   dm[5]=79.2;
 550
 551   //
 552
 553   dm[6]=-73.3;
 554   dm[7]=61.2;
 555   dm[8]=79.2;
 556
 557   //
 558
 559   dm[9]=73.3;
 560   dm[10]=61.2;
 561   dm[11]=79.2;
 562
 563   //
 564
 565   dm[12]=253.6;
 566   dm[13]=65.9;
 567   dm[14]=79.2;
 568
 569   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,15);
 570
 571   // the middle part of the F.C. is thinner - carve out the strip - Ne-CO2
 572
 573   dm[0]=79.16;
 574   dm[1]=79.2;
 575   dm[2]=88.;
 576
 577   gMC->Gsvolu("TII1","TUBE",idtmed[1],dm,3);
 578
 579   gMC->Gspos("TII1",1,"TIIN",0.,0.,0.,0,"ONLY");
 580
 581   //-----------------------------------------------------
 582   // Tpc Inner Field Cage
 583   // mother volume - Al, daughters - composite (sandwich)
 584   //------------------------------------------------------
 585
 586   dm[0]=0.;
 587   dm[1]=360.;
 588   dm[2]=10.;
 589
 590   //
 591
 592   dm[3]=-253.6;
 593   dm[4]=70.3;
 594   dm[5]=79.2;
 595
 596   //
 597
 598   dm[6]=-250.6;
 599   dm[7]=70.3;
 600   dm[8]=79.2;
 601
 602   //
 603
 604   dm[9]=-250.6;
 605   dm[10]=77.05;
 606   dm[11]=79.2;
 607
 608   //
 609
 610   dm[12]=-88.;
 611   dm[13]=77.05;
 612   dm[14]=79.2;
 613
 614   //
 615
 616   dm[15]=-88.;
 617   dm[16]=77.09;
 618   dm[17]=79.16;
 619
 620   //
 621
 622   dm[18]=88.;
 623   dm[19]=77.09;
 624   dm[20]=79.16;
 625
 626   //
 627
 628   dm[21]=88.;
 629   dm[22]=77.05;
 630   dm[23]=79.2;
 631
 632   //
 633
 634   dm[24]=250.6;
 635   dm[25]=77.05;
 636   dm[26]=79.2;
 637
 638   //
 639
 640   dm[27]=250.6;
 641   dm[28]=70.3;
 642   dm[29]=79.2;
 643
 644   //
 645
 646   dm[30]=253.6;
 647   dm[31]=70.3;
 648   dm[32]=79.2;
 649
 650   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,33);
 651
 652   // daughter volumes - central part
 653
 654   // Tpc Sandwich 9 -Tedlar
 655
 656   dm[0]=77.09;
 657   dm[1]=79.16;
 658   dm[2]=88.;
 659
 660   gMC->Gsvolu("TSA9","TUBE",idtmed[9],dm,3);
 661
 662   // Tpc Sandwich 10 - fiber glass (G10)
 663
 664   dm[0] += 5.e-3;
 665   dm[1] -= 5.e-3;
 666
 667   gMC->Gsvolu("TS10","TUBE",idtmed[12],dm,3);
 668
 669   // Tpc Sandwich 11 - NOMEX
 670
 671   dm[0] += 0.03;
 672   dm[1] -= 0.03;
 673
 674   gMC->Gsvolu("TS11","TUBE",idtmed[6],dm,3);
 675
 676   // 11->10->9->TIFC
 677
 678   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
 679   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
 680
 681   gMC->Gspos("TSA9",1,"TIFC",0.,0.,0.,0,"ONLY");
 682
 683   // daughter volumes - outer parts (reinforced)
 684
 685   // Tpc Sandwich 12 -Tedlar
 686
 687   dm[0]=77.05;
 688   dm[1]=79.2;
 689   dm[2]=82.05;
 690
 691   gMC->Gsvolu("TS12","TUBE",idtmed[9],dm,3);
 692
 693   // Tpc Sandwich 13 - fiber glass (G10)
 694
 695   dm[0] += 5.e-3;
 696   dm[1] -= 5.e-3;
 697
 698   gMC->Gsvolu("TS13","TUBE",idtmed[12],dm,3);
 699
 700   // Tpc Sandwich 14 - NOMEX
 701
 702   dm[0] += 0.07;
 703   dm[1] -= 0.07;
 704
 705   gMC->Gsvolu("TS14","TUBE",idtmed[6],dm,3);
 706
 707   // 14->13->12->TIFC
 708
 709   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
 710   gMC->Gspos("TS13",1,"TS12",0.,0.,0.,0,"ONLY");
 711
 712   gMC->Gspos("TS12",1,"TIFC",0.,0.,170.05,0,"ONLY");
 713   gMC->Gspos("TS12",2,"TIFC",0.,0.,-170.05,0,"ONLY");
 714
 715   // place this inside the inner insulator
 716
 717   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
 718
 719   // and now in the TPC...
 720
 721   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 722
 723   //---------------------------------------------------------
 724   // Tpc Inner Containment vessel - Cones
 725   //---------------------------------------------------------
 726
 727   dm[0]=0.;
 728   dm[1]=360.;
 729   dm[2]=8.;
 730
 731   //
 732
 733   dm[3]=71.8;
 734   dm[4]=56.9;
 735   dm[5]=59.4;
 736
 737   //
 738
 739   dm[6]=73.;
 740   dm[7]=56.9;
 741   dm[8]=59.4;
 742
 743   //
 744
 745   dm[9]=73.;
 746   dm[10]=56.9;
 747   dm[11]=61.2;
 748
 749   //
 750
 751   dm[12]=73.3;
 752   dm[13]=56.9;
 753   dm[14]=61.2;
 754
 755   //
 756
 757   dm[15]=73.3;
 758   dm[16]=60.9;
 759   dm[17]=61.2;
 760
 761   //
 762
 763   dm[18]=253.6;
 764   dm[19]=65.6;
 765   dm[20]=65.9;
 766
 767   //
 768
 769   dm[21]=253.6;
 770   dm[22]=65.6;
 771   dm[23]=74.6;
 772
 773   //
 774
 775   dm[24]=256.6;
 776   dm[25]=65.6;
 777   dm[26]=74.6;
 778
 779   gMC->Gsvolu("TICC","PCON",idtmed[4],dm,27);
 780
 781   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
 782
 783   // reflection matrix
 784
 785   theta1 = 90.;
 786   phi1   = 0.;
 787   theta2 = 90.;
 788   phi2   = 270.;
 789   theta3 = 180.;
 790   phi3   = 0.;
 791
 792   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 793
 794   gMC->Gspos("TICC",1,"TPC ",0.,0.,0.,0,"ONLY");
 795   gMC->Gspos("TICC",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 796
 797
 798   //---------------------------------------------------------
 799   // Tpc Inner Containment vessel - Middle part -Al
 800   //---------------------------------------------------------
 801
 802   dm[0]=0.;
 803   dm[1]=360.;
 804   dm[2]=6.;
 805
 806   //
 807
 808   dm[3]=-71.6;
 809   dm[4]=60.2;
 810   dm[5]=61.2;
 811
 812   //
 813
 814   dm[6]=-69.1;
 815   dm[7]=60.2;
 816   dm[8]=61.2;
 817
 818   //
 819
 820   dm[9]=-69.1;
 821   dm[10]=60.64;
 822   dm[11]=61.2;
 823
 824   //
 825
 826   dm[12]=69.1;
 827   dm[13]=60.64;
 828   dm[14]=61.2;
 829
 830   //
 831
 832   dm[15]=69.1;
 833   dm[16]=60.2;
 834   dm[17]=61.2;
 835
 836   //
 837
 838   dm[18]=71.6;
 839   dm[19]=60.2;
 840   dm[20]=61.2;
 841
 842   gMC->Gsvolu("TICM","PCON",idtmed[4],dm,21);
 843
 844   // Tpc Sandwich 15 - Al
 845
 846   dm[0]=60.64;
 847   dm[1]=61.2;
 848   dm[2]=70.1;
 849
 850   gMC->Gsvolu("TS15","TUBE",idtmed[4],dm,3);
 851
 852   // Tpc Sandwich 16 -  epoxy glue
 853
 854   dm[0] += 5.e-3;
 855   dm[1] -= 5.e-3;
 856
 857   gMC->Gsvolu("TS16","TUBE",idtmed[14],dm,3);
 858
 859   // Tpc Sandwich 17 - Tedlar
 860
 861   dm[0] += 0.01;
 862   dm[1] -= 0.01;
 863
 864   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
 865
 866   // Tpc Sandwich 18 - fiber glass
 867
 868   dm[0] += 5.e-3;
 869   dm[1] -= 5.e-3;
 870
 871   gMC->Gsvolu("TS18","TUBE",idtmed[12],dm,3);
 872
 873   // Tpc Sandwich 19 - Nomex
 874
 875   dm[0] += 0.01;
 876   dm[1] -= 0.01;
 877
 878   gMC->Gsvolu("TS19","TUBE",idtmed[12],dm,3);
 879
 880   // 19->18->17->16->15-> TICM
 881
 882   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY");
 883   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
 884   gMC->Gspos("TS17",1,"TS16",0.,0.,0.,0,"ONLY");
 885   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
 886
 887   gMC->Gspos("TS15",1,"TICM ",0.,0.,0.,0,"ONLY");
 888
 889
 890   // TPc inner cont. vessel Joints
 891
 892   dm[0]=60.2;
 893   dm[1]=61.2;
 894   dm[2]=0.5;
 895
 896   gMC->Gsvolu("TPJ1","TUBE",idtmed[4],dm,3);
 897
 898   gMC->Gspos("TPJ1",1,"TPC ",0.,0.,72.3,0,"ONLY");
 899   gMC->Gspos("TPJ1",2,"TPC ",0.,0.,-72.3,0,"ONLY");
 900
 901   //
 902
 903   dm[0]=0.;
 904   dm[1]=360.;
 905   dm[2]=4.;
 906
 907   //
 908
 909   dm[3]=70.8;
 910   dm[4]=58.4;
 911   dm[5]=60.1;
 912
 913   //
 914
 915   dm[6]=71.2;
 916   dm[7]=58.4;
 917   dm[8]=60.1;
 918
 919   //
 920
 921   dm[9]=71.2;
 922   dm[10]=58.4;
 923   dm[11]=59.4;
 924
 925   //
 926
 927   dm[12]=71.6;
 928   dm[13]=58.4;
 929   dm[14]=59.4;
 930
 931   gMC->Gsvolu("TPJ2","PCON",idtmed[4],dm,15);
 932
 933   gMC->Gspos("TPJ2",1,"TPC ",0.,0.,0.,0,"ONLY");
 934   gMC->Gspos("TPJ2",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 935
 936
 937
 938   // Tpc Inner Containment vessel Seal (Viton, I use Lexan for a time being)
 939
 940   dm[0]=58.4;
 941   dm[1]=61.2;
 942   dm[2]=0.1;
 943
 944   gMC->Gsvolu("TICS","TUBE",idtmed[14],dm,3);
 945
 946   gMC->Gspos("TICS",1,"TPC ",0.,0.,71.7,0,"ONLY");
 947   gMC->Gspos("TICS",2,"TPC ",0.,0.,-71.7,0,"ONLY");
 948
 949   // TICM -> TPC
 950
 951   gMC->Gspos("TICM",1,"TPC ",0.,0.,0.,0,"ONLY");
 952
 953   //
 954
 955   nRotMat++; // prepare for the next rotation matrix
 956
 957   //---------------------------------------------------------
 958   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
 959   //  and its daughters (HV membrane, rods, readout chambers)
 960   //---------------------------------------------------------
 961
 962   dm[0]= 79.2;
 963   dm[1]= 258.0;
 964   dm[2]= 253.6;
 965
 966   gMC->Gsvolu("TDGN","TUBE",idtmed[1],dm,3);
 967
 968   // sector opening angles
 969
 970   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
 971   Float_t outerOpenAngle = fTPCParam->GetOuterAngle();
 972
 973   // sector angle shift
 974
 975   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
 976
 977
 978   // All above parameters are identical for inner and outer
 979   // sectors. The distinction is kept for the historical reasons
 980   // and eventually will disappear.
 981
 982   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
 983   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
 984   Float_t space;
 985
 986   //-------------------------------------------------------------------------
 987   //   Tpc Inner Readout Chambers
 988   //-------------------------------------------------------------------------
 989
 990   dm[0]= 14.483;
 991   dm[1]= 23.3345;
 992   dm[2]= 1.6; // thickness
 993   dm[3]= 25.1;
 994
 995   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
 996
 997   // this volume will be positioned in the empty space
 998   // of the end-cap to avoid overlaps
 999
1000   dm[0]= 13.7305;
1001   dm[1]= 21.1895;
1002   dm[2]= 2.25;
1003   dm[3]= 21.15;
1004
1005   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
1006
1007
1008   //------------------------------------------------
1009   // Tpc Inner readout chamber Pad Plane
1010   //------------------------------------------------
1011
1012   dm[0]= 14.483;
1013   dm[1]= 23.3345;
1014   dm[2]= 0.5;
1015   dm[3]= 25.1;
1016
1017   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
1018
1019   //
1020
1021   dm[0] -= 1.218511934;
1022   dm[1] -= 1.218511934;
1023   dm[2] = 0.35;
1024
1025   gMC->Gsvolu("TIC3","TRD1",idtmed[1],dm,4);
1026
1027   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
1028
1029   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
1030
1031
1032   //----------------------------------------------
1033   // Tpc Readout Chambers Empty spaces - for both
1034   // inner and outer sectors
1035   //----------------------------------------------
1036
1037   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
1038
1039   // Inner sector - 4 spaces
1040
1041
1042   dm[3] = 4.7625;
1043   dm[0] = 12.472;
1044
1045   Float_t rr = 90.52;
1046   Float_t zz;
1047
1048   zz= -12.7875;
1049
1050   space = rr*tanAlpha-dm[0];
1051
1052   for(Int_t nsLow=0;nsLow<4;nsLow++){
1053
1054     rr += 9.525;
1055     dm[1]= rr*tanAlpha - space;
1056
1057     dm[2]=0.8;
1058
1059     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
1060
1061     //
1062
1063     dm[2] = 1.2;
1064
1065     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
1066
1067     rr += 0.4;
1068     dm[0] = rr*tanAlpha - space;
1069     zz += (0.4+9.525);
1070
1071   }
1072
1073   dm[0]= 12.472;
1074   // dm[1] - this is the dm[1] from the previous TRCE
1075   dm[2]= 1.05;
1076   dm[3]= 19.65;
1077
1078   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.2,0.,0,"ONLY",dm,4);
1079
1080   //
1081   // TPc Space for Connectors
1082   //
1083
1084   dm[0]= .3;
1085   dm[1]= .3;
1086   dm[2]= 4.5;
1087
1088   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
1089
1090   // TPC Connectors
1091
1092   dm[0]= .25;
1093   dm[1]= .15;
1094   dm[2]= 3.75;
1095
1096   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3);
1097
1098   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1099
1100   zz = -12.7875;
1101
1102
1103   Float_t alpha;
1104   Float_t astep;
1105
1106   // inner part of the inner sector - 2 x 20 holes
1107
1108   astep = 20.00096874/19.;
1109
1110   alpha = 10.00048437-astep;
1111
1112   Float_t x1,x2;
1113
1114     x1 = 13.31175725;
1115     x1 -= 0.996357832;
1116
1117     x2 = 15.06180253;
1118     x2 -= 1.163028812;
1119
1120   Int_t ncon;
1121
1122   for(ncon=0;ncon<20;ncon++){
1123
1124     phi1 = 0.;
1125     theta1 = 90.+alpha;
1126     phi2=90.;
1127     theta2 = 90.;
1128     phi3 = (alpha>0) ? 0. : 180.;
1129     theta3 = TMath::Abs(alpha);
1130
1131     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1132
1133
1134
1135     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1136     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1137
1138
1139     x1 -= 1.296357833;
1140     x2 -= 1.463028812;
1141
1142     alpha -= astep;
1143     nRotMat++;
1144
1145   }
1146
1147   // outer part of the inner sector - 2 x 25 holes
1148
1149    astep = 20.00096874/24.;
1150    alpha = 10.00048437-astep;
1151
1152    x1 = 16.81184781;
1153    x1 -= 1.016295986;
1154
1155    x2 = 18.5618931;
1156    x2 -= 1.150914854;
1157
1158   for(ncon=0;ncon<25;ncon++){
1159
1160     phi1 = 0.;
1161     theta1 = 90.+alpha;
1162     phi2=90.;
1163     theta2 = 90.;
1164     phi3 = (alpha>0) ? 0. : 180.;
1165     theta3 = TMath::Abs(alpha);
1166
1167     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1168
1169
1170
1171     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1172     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1173
1174
1175     x1 -= 1.316295986;
1176     x2 -= 1.450914854;
1177
1178     alpha -= astep;
1179     nRotMat++;
1180
1181   }
1182
1183   //--------------------------------------------------------------------------
1184   //  TPC Outer Readout Chambers
1185   //  this is NOT a final design
1186   //--------------------------------------------------------------------------
1187
1188   dm[0]= 23.3875;
1189   dm[1]= 43.524;
1190   dm[2]= 1.5; //thickness
1191   dm[3]= 57.1;
1192
1193   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1194
1195   //------------------------------------------------
1196   // Tpc Outer readout chamber Pad Plane
1197   //------------------------------------------------
1198
1199   dm[2]= 0.5;
1200
1201   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1202
1203   dm[0] -= 1.218511934;
1204   dm[1] -= 1.218511934;
1205   dm[2] = 0.35;
1206
1207   gMC->Gsvolu("TOC3","TRD1",idtmed[1],dm,4);
1208
1209   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1210
1211   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1212
1213   // empty space
1214
1215   dm[0]= 21.035;
1216   dm[1]= 38.7205;
1217   dm[2]= 0.7;
1218   dm[3]= 50.15;
1219
1220   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);
1221
1222   dm[0]= 22.2935;
1223   dm[1]= 40.5085;
1224   dm[2]= 2.25;
1225   dm[3]= 51.65;
1226
1227   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1228
1229   dm[0]= 21.35;
1230   dm[1]= 38.7205;
1231   dm[2]= 2.25;
1232   dm[3]= 50.15;
1233
1234   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1235
1236   //-----------------------------------------------
1237   // Tpc Services Support Wheel
1238   //-----------------------------------------------
1239
1240   dm[0]=0.;
1241   dm[1]=360.;
1242   dm[2]=18.;
1243   dm[3]=2.;
1244
1245   dm[4]= -5.;
1246   dm[5]= 77.017;
1247   dm[6]= 255.267;
1248
1249   dm[7]= 5.;
1250   dm[8]= dm[5];
1251   dm[9]= dm[6];
1252
1253   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1254
1255   // Tpc Services Wheel Cover
1256
1257   dm[4]= -0.5;
1258   dm[7]= 0.5;
1259
1260   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1261
1262   // Tpc Service wheel Cover Empty space
1263
1264   dm[0]= 10.99;
1265   dm[1]= 39.599;
1266   dm[2]= .5;
1267   dm[3]= 81.125;
1268
1269   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1270
1271   // Tpc services Wheel Empty Spaces
1272
1273   dm[0]= 13.18017507;
1274   dm[1]= 44.61045938;
1275   dm[2]= 4.;
1276   dm[3]= 89.125;
1277
1278   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1279
1280   // Tpc Services Wheel Bars
1281
1282   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1283
1284   // bars-> TWES
1285
1286   dm[2]= 4.;
1287   dm[3]= .4;
1288
1289   dm[0]= 13.8149522;
1290   dm[1]= 13.95601379;
1291
1292   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1293
1294   dm[0]= 43.83462067;
1295   dm[1]= 43.97568225;
1296
1297   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1298
1299   // TPc ELectronics - right now 30% X0 Si
1300
1301   dm[0]= 14.03813696;
1302   dm[1]= 43.3524075;
1303   dm[2]= 1.404;
1304   dm[3]= 83.125;
1305
1306   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1307   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1308
1309   //--------------------------------------------------------------------------
1310   //  End caps
1311   //--------------------------------------------------------------------------
1312
1313   // TPc Main Wheel - Al
1314
1315   dm[0]= 74.9;
1316   dm[1]= 264.4;
1317   dm[2]= 3.0;
1318
1319   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1320
1321   //--------------------------------------------------------------------------
1322   //  Tpc Empty Space for the Readout chambers
1323   //--------------------------------------------------------------------------
1324
1325   Float_t rLow= 86.2;
1326   Float_t rUp= 243.5;
1327   Float_t dR = 0.5*(rUp-rLow);
1328
1329   space= 1.5/cosAlpha; // wheel ribs are 3.0 cm wide
1330
1331   dm[0]= rLow*tanAlpha-space;
1332   dm[1]= rUp*tanAlpha-space;
1333   dm[2] = 3.0;
1334   dm[3]= dR;
1335
1336   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1337
1338   // TIC1->TESR
1339
1340   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1341
1342   // TOC1->TESR
1343
1344   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1345
1346   // Tpc Empty Space Bars - Al (daughters of TESR)
1347
1348   Float_t zBar;
1349
1350   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1351
1352   // lower bar
1353
1354   dm[0]= rLow*tanAlpha-space;
1355   dm[1]= 88.7*tanAlpha-space;
1356   dm[2]= 2.25;
1357   dm[3]= 1.275;
1358
1359   zBar = -dR+dm[3];
1360
1361   gMC->Gsposp("TESB",1,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1362
1363   // middle bar
1364
1365   dm[0]= 131.65*tanAlpha-space;
1366   dm[1]= 136.5*tanAlpha-space;
1367   dm[3]= 2.425;
1368
1369   zBar = -dR +131.65+dm[3]-rLow;
1370
1371   gMC->Gsposp("TESB",2,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1372
1373   // upper bar
1374
1375   dm[0]= 240.4*tanAlpha-space;
1376   dm[1]= rUp*tanAlpha-space;
1377   dm[3]= 1.55;
1378
1379   zBar = dR-dm[3];
1380
1381   gMC->Gsposp("TESB",3,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1382
1383   //------------------------------------------------------
1384   //  TPc Lower "S" Sectors
1385   //------------------------------------------------------
1386
1387
1388   Float_t inSecLowEdge = fTPCParam->GetInnerRadiusLow();
1389   Float_t inSecUpEdge =  fTPCParam->GetInnerRadiusUp();
1390
1391   dm[0] = inSecLowEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1392   dm[1] = inSecUpEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1393   dm[2] = 0.5*(250. - 5.e-3);
1394   dm[3] = 0.5*(inSecUpEdge-inSecLowEdge);
1395
1396   gMC->Gsvolu("TPLS", "TRD1", idtmed[2], dm, 4); // sensitive
1397
1398
1399   //----------------------------------------------------------
1400   //  TPc Upper Sectors
1401   //----------------------------------------------------------
1402
1403   Float_t ouSecLowEdge = fTPCParam->GetOuterRadiusLow();
1404   Float_t ouSecUpEdge = fTPCParam->GetOuterRadiusUp();
1405
1406   dm[0] = ouSecLowEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;
1407   dm[1] = ouSecUpEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;
1408   dm[2] = 0.5*(250. - 5.e-3);
1409   dm[3] = 0.5*(ouSecUpEdge-ouSecLowEdge);
1410
1411   gMC->Gsvolu("TPUS", "TRD1", idtmed[2], dm, 4); // sensitive
1412
1413
1414
1415   // sensitive strips
1416
1417     gMC->Gsvolu("TPSS","TRD1",idtmed[2],dm,0); // sensitive
1418
1419     Int_t nofStrips,nstr;
1420     Float_t r1,r2,zs;
1421     Float_t stripThick = 0.01; // 100 microns
1422     Float_t deadSpace;
1423
1424     // inner sector
1425
1426
1427     // if all lower sectors selected define only 1 strip
1428
1429     nofStrips=((fSecAL <0)||(fSecAL>=0 && fSens<0)) ? 1 : fTPCParam->GetNRowLow();
1430     deadSpace = fTPCParam->GetInnerWireMount();
1431
1432     dm[2] = 0.5*(250. - 5.e-3);
1433     dm[3] = 0.5 * stripThick;
1434
1435     for(nstr=0;nstr<nofStrips;nstr++){
1436
1437       r1 = fTPCParam->GetPadRowRadiiLow(nstr);
1438       r2 = r1 + stripThick;
1439       dm[0] = r1 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1440       dm[1] = r2 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1441       zs = -inSecLowEdge -0.5*(inSecUpEdge-inSecLowEdge);
1442       zs += r1;
1443       zs += dm[3];
1444
1445       gMC->Gsposp("TPSS", nstr+1, "TPLS", 0., 0., zs, 0, "ONLY", dm, 4);
1446
1447
1448     }
1449
1450     // strips only if several upper sectors selected end fSens > 0
1451
1452     if(fSecAU >=0 && fSens >0){
1453
1454     Int_t nsSave = nofStrips;
1455
1456     // outer sector
1457
1458     nofStrips = fTPCParam->GetNRowUp();
1459     deadSpace = fTPCParam->GetOuterWireMount();
1460
1461     dm[2] = 0.5*(250. - 5.e-3);
1462     dm[3] = 0.5 * stripThick;
1463
1464
1465     for(nstr=0;nstr<nofStrips;nstr++){
1466
1467       r1 = fTPCParam->GetPadRowRadiiUp(nstr);
1468       r2 = r1 + stripThick;
1469       dm[0] = r1 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1470       dm[1] = r2 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1471       zs = -ouSecLowEdge -0.5*(ouSecUpEdge-ouSecLowEdge);
1472       zs += r1;
1473       zs += dm[3];
1474
1475       gMC->Gsposp("TPSS", nstr+1+nsSave, "TPUS", 0., 0., zs, 0, "ONLY", dm, 4);
1476
1477      }
1478     }
1479
1480
1481   //-------------------------------------------------------
1482   //  positioning of the empty spaces into the main wheel
1483   //  and readout chambers and sectors into the drift gas
1484   //-------------------------------------------------------
1485
1486   Float_t rCenter,xc,yc;
1487   Float_t rInner,rOuter; // center of the inner and outer chamber
1488
1489   rCenter = rLow+dR;
1490
1491   rInner = 108.07;
1492   rOuter = 190.68;
1493
1494
1495   for(Int_t ns=0; ns<nInnerSector;ns++){
1496
1497     phi1 = ns * innerOpenAngle + innerAngleShift;
1498     phi1 *= kRaddeg; // in degrees
1499
1500     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1501
1502     if (phi1 > 360.) phi1 -= 360.;
1503
1504     theta1 = 90.;
1505     phi2   = 90.;
1506     theta2 = 180.;
1507     phi3   = ns * innerOpenAngle + innerAngleShift;
1508     phi3 *= kRaddeg; // in degrees
1509
1510     phi3 = (Float_t)TMath::Nint(phi3);
1511
1512     if(phi3 > 360.) phi3 -= 360.;
1513
1514     theta3 = 90.;
1515
1516     // "holes"->End plate
1517
1518     xc = rCenter*TMath::Cos(phi3*kDegrad);
1519     yc = rCenter*TMath::Sin(phi3*kDegrad);
1520
1521     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1522
1523     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1524
1525     // TSCE->TSWC (services wheel volumes)
1526
1527     xc = 166.142*TMath::Cos(phi3*kDegrad);
1528     yc = 166.142*TMath::Sin(phi3*kDegrad);
1529
1530     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1531     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1532
1533
1534     // readout chambers->TDGN (drift gas)
1535
1536     xc = rInner*TMath::Cos(phi3*kDegrad);
1537     yc = rInner*TMath::Sin(phi3*kDegrad);
1538
1539     gMC->Gspos("TIRC",ns+1,"TDGN",xc,yc,252.,idrotm[nRotMat],"ONLY");
1540
1541     // here lower sectors
1542
1543     if(fSecAL <0){
1544
1545       // all lower sectors are positioned
1546
1547       gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1548       gMC->
1549         Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1550     }
1551     else{
1552
1553       // only selected sectors are positioned (up to 6 sectors)
1554
1555       for(Int_t sel=0;sel<6;sel++){
1556
1557         if(fSecLows[sel] == ns){
1558           gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1559         }
1560         else if(fSecLows[sel] == ns+nInnerSector){
1561          gMC->
1562          Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1563         }
1564       }
1565     } // lower sectors finished
1566
1567
1568     xc = rOuter*TMath::Cos(phi3*kDegrad);
1569     yc = rOuter*TMath::Sin(phi3*kDegrad);
1570
1571     gMC->Gspos("TORC",ns+1,"TDGN",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1572
1573     // here upper sectors
1574
1575     if(fSecAU <0){
1576
1577       // all upper sectors
1578
1579       gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1580       gMC->
1581         Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1582     }
1583     else{
1584
1585       // only selected sectors (up to 12)
1586
1587       for(Int_t sel=0;sel<12;sel++){
1588         if(fSecUps[sel] == ns+2*nInnerSector){
1589           gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1590         }
1591         else if(fSecUps[sel] == ns+2*nInnerSector+nOuterSector){
1592          gMC->
1593           Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1594         }
1595       }
1596     } // upper sectors finished
1597
1598
1599     nRotMat++;
1600
1601     theta2 = 0.; // reflection
1602
1603     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1604
1605     xc = rInner*TMath::Cos(phi3*kDegrad);
1606     yc = rInner*TMath::Sin(phi3*kDegrad);
1607
1608     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGN",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1609
1610     xc = rOuter*TMath::Cos(phi3*kDegrad);
1611     yc = rOuter*TMath::Sin(phi3*kDegrad);
1612
1613     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGN",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1614
1615     nRotMat++;
1616
1617   }
1618   // TPMW->TPC
1619
1620   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1621   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[0],"ONLY");
1622
1623   //---------------------------------------------------------
1624   //  Tpc High Voltage Membrane - 100 microns of mylar
1625   //---------------------------------------------------------
1626
1627   dm[0]=82.8;
1628   dm[1]=252.;
1629   dm[2]=0.005;
1630
1631   gMC->Gsvolu("THVM","TUBE",idtmed[8],dm,3);
1632
1633   gMC->Gspos("THVM",1,"TDGN",0.,0.,0.,0,"ONLY");
1634
1635   // Tpc High Voltage membrane Holders
1636
1637   gMC->Gsvolu("THVH","TUBE",idtmed[4],dm,0);
1638
1639
1640
1641   // inner
1642
1643   dm[0]=79.3;
1644   dm[1]=82.8;
1645   dm[2]=0.2;
1646
1647   gMC->Gsposp("THVH",1,"TDGN",0.,0.,0.,0,"ONLY",dm,3);
1648
1649   // outer
1650
1651   dm[0]= 252.;
1652   dm[1]= 257.9;
1653   dm[2]= 0.4;
1654
1655   gMC->Gsposp("THVH",2,"TDGN",0.,0.,0.,0,"ONLY",dm,3);
1656
1657   //----------------------------------------------------------
1658   // TPc Support Rods - MAKROLON
1659   //----------------------------------------------------------
1660
1661   dm[0]= 0.9;
1662   dm[1]= 1.2;
1663
1664   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,0); // inner and outer rods differ
1665
1666
1667   for(Int_t nrod=0;nrod<18;nrod++){
1668     Float_t angle=innerOpenAngle*(Float_t)nrod;
1669
1670     xc=81.5*TMath::Cos(angle);
1671     yc=81.5*TMath::Sin(angle);
1672
1673     dm[2]=126.7;
1674
1675     gMC->Gsposp("TPSR",nrod+1,"TDGN",xc,yc,126.9,0,"ONLY",dm,3);
1676     gMC->Gsposp("TPSR",nrod+19,"TDGN",xc,yc,-126.9,0,"ONLY",dm,3);
1677
1678     dm[2]=126.6;
1679
1680     xc=254.25*TMath::Cos(angle);
1681     yc=254.25*TMath::Sin(angle);
1682
1683     // rod number 54 contans the HV cable
1684
1685     if(nrod<17) {
1686       gMC->Gsposp("TPSR",nrod+37,"TDGN",xc,yc,127.,0,"ONLY",dm,3);
1687       gMC->Gsposp("TPSR",nrod+54,"TDGN",xc,yc,-127.,0,"ONLY",dm,3);
1688     }
1689
1690   }
1691
1692   //----------------------------------------------------------
1693   // Tpc High Voltage Rod - MAKROLON + Copper cable
1694   //----------------------------------------------------------
1695
1696   // rod with cable (Left)
1697
1698   dm[0]=0.;
1699   dm[1]=2.25;
1700   dm[2]=126.6;
1701
1702   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1703
1704   // HV cable
1705
1706   dm[0]=0.;
1707   dm[1]=0.3;
1708   dm[2]=126.6;
1709
1710   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);
1711
1712   // empty space
1713
1714   dm[0]=0.3;
1715   dm[1]=1.;
1716   dm[2]=126.6;
1717
1718   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1719
1720   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1721   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1722
1723   // rod without cable
1724
1725   dm[0]=1.8;
1726   dm[1]=2.25;
1727   dm[2]=126.6;
1728
1729   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1730
1731   gMC->Gspos("THVL",1,"TDGN",xc,yc,-127.,0,"ONLY");
1732   gMC->Gspos("THVR",1,"TDGN",xc,yc,127.,0,"ONLY");
1733
1734   gMC->Gspos("TDGN",1,"TPC ",0.,0.,0.,0,"ONLY");
1735
1736   // services wheel cover -> wheel
1737
1738
1739   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1740   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1741
1742
1743   // put the wheel into the TPC
1744
1745   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1746   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1747
1748   //
1749
1750   gMC->Gsord("TPMW",6);
1751   gMC->Gsord("TSSW",6);
1752   gMC->Gsord("TSWC",6);
1753   if(fSecAL >=0)  gMC->Gsord("TPLS",3);
1754   if(fSecAU >=0 && fSens >0)  gMC->Gsord("TPUS",3);
1755   gMC->Gsord("TDGN",6);
1756
1757   // put the TPC into ALIC (main mother volume)
1758
1759   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1760
1761
1762
1763 } // end of function
1764
1765 //_____________________________________________________________________________
1766 void AliTPCv2::DrawDetector()
1767 {
1768   //
1769   // Draw a shaded view of the Time Projection Chamber version 1
1770   //
1771
1772   // Set everything unseen
1773   gMC->Gsatt("*", "seen", -1);
1774   //
1775   // Set ALIC mother transparent
1776   gMC->Gsatt("ALIC","SEEN",0);
1777   //
1778   // Set the volumes visible
1779   //
1780
1781   gMC->Gsatt("TPC ","SEEN",0);
1782   gMC->Gsatt("TOIN","SEEN",1);
1783   gMC->Gsatt("TOIN","COLO",7);
1784   gMC->Gsatt("TOCV","SEEN",1);
1785   gMC->Gsatt("TOCV","COLO",4);
1786   gMC->Gsatt("TSA1","SEEN",0);
1787   gMC->Gsatt("TSA2","SEEN",0);
1788   gMC->Gsatt("TSA3","SEEN",0);
1789   gMC->Gsatt("TSA4","SEEN",0);
1790   gMC->Gsatt("TSA5","SEEN",0);
1791   gMC->Gsatt("TOFC","SEEN",1);
1792   gMC->Gsatt("TOFC","COLO",4);
1793   gMC->Gsatt("TSA6","SEEN",0);
1794   gMC->Gsatt("TSA7","SEEN",0);
1795   gMC->Gsatt("TSA8","SEEN",0);
1796   gMC->Gsatt("TIIN","SEEN",1);
1797   gMC->Gsatt("TIIN","COLO",7);
1798   gMC->Gsatt("TII1","SEEN",0);
1799   gMC->Gsatt("TIFC","SEEN",1);
1800   gMC->Gsatt("TIFC","COLO",4);
1801   gMC->Gsatt("TSA9","SEEN",0);
1802   gMC->Gsatt("TS10","SEEN",0);
1803   gMC->Gsatt("TS11","SEEN",0);
1804   gMC->Gsatt("TS12","SEEN",0);
1805   gMC->Gsatt("TS13","SEEN",0);
1806   gMC->Gsatt("TS14","SEEN",0);
1807   gMC->Gsatt("TICC","SEEN",0);
1808   gMC->Gsatt("TICM","SEEN",0);
1809   gMC->Gsatt("TS15","SEEN",0);
1810   gMC->Gsatt("TS16","SEEN",0);
1811   gMC->Gsatt("TS17","SEEN",0);
1812   gMC->Gsatt("TS18","SEEN",0);
1813   gMC->Gsatt("TS19","SEEN",0);
1814   gMC->Gsatt("TPJ1","SEEN",0);
1815   gMC->Gsatt("TPJ2","SEEN",0);
1816   gMC->Gsatt("TICS","SEEN",0);
1817   gMC->Gsatt("TDGN","SEEN",0);
1818   gMC->Gsatt("TIRC","SEEN",0);
1819   gMC->Gsatt("TIC1","SEEN",1);
1820   gMC->Gsatt("TIPP","SEEN",0);
1821   gMC->Gsatt("TIC3","SEEN",0);
1822   gMC->Gsatt("TRCE","SEEN",0);
1823   gMC->Gsatt("TPSC","SEEN",0);
1824   gMC->Gsatt("TPCC","SEEN",0);
1825   gMC->Gsatt("TORC","SEEN",0);
1826   gMC->Gsatt("TOPP","SEEN",0);
1827   gMC->Gsatt("TOC3","SEEN",0);
1828   gMC->Gsatt("TOC1","SEEN",1);
1829   gMC->Gsatt("TSSW","SEEN",1);
1830   gMC->Gsatt("TSWC","SEEN",1);
1831   gMC->Gsatt("TSSW","COLO",3);
1832   gMC->Gsatt("TSWC","COLO",3);
1833   gMC->Gsatt("TSCE","COLO",6);
1834   gMC->Gsatt("TSCE","SEEN",1);
1835   gMC->Gsatt("TWES","SEEN",0);
1836   gMC->Gsatt("TSWB","SEEN",0);
1837   gMC->Gsatt("TPEL","SEEN",0);
1838   gMC->Gsatt("TPMW","SEEN",1);
1839   gMC->Gsatt("TESR","SEEN",1);
1840   gMC->Gsatt("TPMW","COLO",12);
1841   gMC->Gsatt("TIC1","COLO",5);
1842   gMC->Gsatt("TOC1","COLO",5);
1843   gMC->Gsatt("TESB","SEEN",0);
1844   gMC->Gsatt("THVM","SEEN",1);
1845   gMC->Gsatt("THVM","COLO",11);
1846   gMC->Gsatt("THVH","SEEN",0);
1847   gMC->Gsatt("TPSR","SEEN",0);
1848   gMC->Gsatt("THVL","SEEN",0);
1849   gMC->Gsatt("THVC","SEEN",0);
1850   gMC->Gsatt("THVE","SEEN",0);
1851   gMC->Gsatt("THVR","SEEN",0);
1852   gMC->Gsatt("TPSS","SEEN",0);
1853   gMC->Gsatt("TPUS","SEEN",0);
1854   gMC->Gsatt("TPLS","SEEN",0);
1855
1856   //
1857   gMC->Gdopt("hide", "on");
1858   gMC->Gdopt("shad", "on");
1859   gMC->Gsatt("*", "fill", 7);
1860   gMC->SetClipBox(".");
1861   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1862   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1863   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1864   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1865   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1866   gMC->DefaultRange();
1867   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1868   gMC->Gdhead(1111, "Time Projection Chamber");
1869   gMC->Gdman(18, 4, "MAN");
1870   gMC->Gdopt("hide","off");
1871 }
1872
1873 //_____________________________________________________________________________
1874 void AliTPCv2::CreateMaterials()
1875 {
1876   //
1877   // Define materials for version 2 of the Time Projection Chamber
1878   //
1879
1880   AliTPC::CreateMaterials();
1881 }
1882
1883 //_____________________________________________________________________________
1884 void AliTPCv2::Init()
1885 {
1886   //
1887   // Initialises version 2 of the TPC after that it has been built
1888   //
1889
1890   Int_t *idtmed = fIdtmed->GetArray();
1891
1892   AliTPC::Init();
1893
1894
1895
1896   fIdSens=gMC->VolId("TPSS");
1897
1898   fIdLSec=gMC->VolId("TPLS"); // lower sector
1899   fIdUSec=gMC->VolId("TPUS"); // upper sector
1900
1901   gMC->SetMaxNStep(30000); // max. number of steps increased
1902
1903   gMC->Gstpar(idtmed[2],"LOSS",5); // specific energy loss
1904
1905   printf("*** TPC version 2 initialized ***\n");
1906   printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
1907
1908   //
1909
1910 }
1911
1912 //_____________________________________________________________________________
1913 void AliTPCv2::StepManager()
1914 {
1915   //
1916   // Called for every step in the Time Projection Chamber
1917   //
1918
1919   //
1920   // parameters used for the energy loss calculations
1921   //
1922   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1923   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1924   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1925
1926
1927   const Float_t kbig = 1.e10;
1928
1929   Int_t id,copy;
1930   Float_t hits[4];
1931   Int_t vol[2];
1932   TLorentzVector p;
1933
1934   vol[1]=0; // preset row number to 0
1935
1936   //
1937
1938   gMC->SetMaxStep(kbig);
1939
1940   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1941
1942   Float_t charge = gMC->TrackCharge();
1943
1944   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1945
1946   // check the sensitive volume
1947
1948   id = gMC->CurrentVolID(copy); // current volume Id
1949
1950   if(id == fIdLSec){
1951     vol[0] = copy-1; // lower sector number
1952   }
1953   else if(id == fIdUSec){
1954     vol[0] = copy+fTPCParam->GetNInnerSector()-1; // upper sector number
1955   }
1956   else if(id == fIdSens && gMC->IsTrackEntering()){
1957
1958     // track is entering the sensitive strip
1959
1960     vol[1]= copy-1; // row number (absolute)
1961
1962     // sector type
1963
1964     id = gMC->CurrentVolOffID(1,copy);
1965
1966     if(id == fIdLSec){
1967
1968       // lower sector
1969
1970       vol[0] = copy-1; // sector number
1971
1972     }
1973     else {
1974
1975       // upper sector
1976
1977       vol[0] = copy-1+fTPCParam->GetNInnerSector(); // sector number
1978       vol[1] -= fTPCParam->GetNRowLow(); // row number (starts also from 0)
1979
1980     }
1981
1982     if(vol[1] == 0){
1983
1984       // because Jouri wants to have this
1985
1986       gMC->TrackMomentum(p);
1987       hits[0]=p[0];
1988       hits[1]=p[1];
1989       hits[2]=p[2];
1990       hits[3]=0.; // this hit has no energy loss
1991       // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
1992
1993       AddHit(gAlice->CurrentTrack(), vol,hits);  //MI change
1994
1995     }
1996
1997      gMC->TrackPosition(p);
1998      hits[0]=p[0];
1999      hits[1]=p[1];
2000      hits[2]=p[2];
2001      hits[3]=0.; // this hit has no energy loss
2002      // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
2003
2004      AddHit(gAlice->CurrentTrack(), vol,hits);  //MI change
2005
2006   }
2007   else return;
2008
2009   //-----------------------------------------------------------------
2010   //  charged particle is in the sensitive volume
2011   //-----------------------------------------------------------------
2012
2013   if(gMC->TrackStep() > 0) {
2014
2015     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
2016     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
2017
2018     gMC->TrackPosition(p);
2019     hits[0]=p[0];
2020     hits[1]=p[1];
2021     hits[2]=p[2];
2022     hits[3]=(Float_t)nel;
2023
2024     // Add this hit
2025
2026     // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
2027     if (fHitType&&2){
2028       gMC->TrackMomentum(p);
2029       Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
2030       Float_t precision =   (momentum>0.1) ? 0.002 :0.01;
2031       fTrackHits->SetHitPrecision(precision);
2032     }
2033     AddHit(gAlice->CurrentTrack(), vol,hits);  //MI change
2034
2035   }
2036
2037   // Stemax calculation for the next step
2038
2039   Float_t pp;
2040   TLorentzVector mom;
2041   gMC->TrackMomentum(mom);
2042   Float_t ptot=mom.Rho();
2043   Float_t betaGamma = ptot/gMC->TrackMass();
2044
2045   Int_t pid=gMC->TrackPid();
2046   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
2047     {
2048       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
2049     }
2050   else
2051     {
2052
2053       betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
2054       pp=kprim*BetheBloch(betaGamma);
2055
2056       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
2057     }
2058
2059   Float_t random[1];
2060   gMC->Rndm(random,1); // good, old GRNDM from Geant3
2061
2062   Double_t rnd = (Double_t)random[0];
2063
2064   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
2065
2066 }
2067
2068 //_____________________________________________________________________________
2069 Float_t AliTPCv2::BetheBloch(Float_t bg)
2070 {
2071   //
2072   // Bethe-Bloch energy loss formula
2073   //
2074   const Double_t kp1=0.76176e-1;
2075   const Double_t kp2=10.632;
2076   const Double_t kp3=0.13279e-4;
2077   const Double_t kp4=1.8631;
2078   const Double_t kp5=1.9479;
2079
2080   Double_t dbg = (Double_t) bg;
2081
2082   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
2083
2084   Double_t aa = TMath::Power(beta,kp4);
2085   Double_t bb = TMath::Power(1./dbg,kp5);
2086
2087   bb=TMath::Log(kp3+bb);
2088
2089   return ((Float_t)((kp2-aa-bb)*kp1/aa));
2090 }
2091
2092