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 /* $Id$ */
  17
  18 //
  19 ///////////////////////////////////////////////////////////////////////////////
  20 //                                                                           //
  21 //  Time Projection Chamber version 2 -- detailed TPC and slow simulation    //
  22 //                                                                           //
  23 //Begin_Html
  24 /*
  25 <img src="picts/AliTPCv2Class.gif">
  26 */
  27 //End_Html
  28 //                                                                           //
  29 //                                                                           //
  30 ///////////////////////////////////////////////////////////////////////////////
  31
  32 #include <stdlib.h>
  33
  34 #include <TLorentzVector.h>
  35 #include <TMath.h>
  36 #include <TPDGCode.h>
  37 #include <TVirtualMC.h>
  38
  39 #include "AliConst.h"
  40 #include "AliLog.h"
  41 #include "AliMC.h"
  42 #include "AliRun.h"
  43 #include "AliTPCDigitsArray.h"
  44 #include "AliTPCParam.h"
  45 #include "AliTPCParamSR.h"
  46 #include "AliTPCTrackHitsV2.h"
  47 #include "AliTPCv2.h"
  48
  49 ClassImp(AliTPCv2)
  50
  51 //_____________________________________________________________________________
  52 AliTPCv2::AliTPCv2(const char *name, const char *title) :
  53   AliTPC(name, title)
  54 {
  55   //
  56   // Standard constructor for Time Projection Chamber version 2
  57   //
  58   fIdSens=0;
  59   fIdLSec=0;
  60   fIdUSec=0;
  61
  62   SetBufferSize(128000);
  63
  64   SetGasMixt(2,20,10,-1,0.9,0.1,0.); // Ne-CO2 90-10
  65
  66   // Default sectors
  67
  68   SetSecAL(4);
  69   SetSecAU(4);
  70   SetSecLows(1,  2,  3, 19, 20, 21);
  71   SetSecUps(37, 38, 39, 37+18, 38+18, 39+18, -1, -1, -1, -1, -1, -1);
  72   SetSens(1); // sensitive strips set
  73
  74   if (fTPCParam)
  75      fTPCParam->Write(fTPCParam->GetTitle());
  76 }
  77
  78 //_____________________________________________________________________________
  79 void AliTPCv2::CreateGeometry()
  80 {
  81   //
  82   // Create the geometry of Time Projection Chamber version 2
  83   //
  84   //Begin_Html
  85   /*
  86     <img src="picts/AliTPC.gif">
  87   */
  88   //End_Html
  89   //Begin_Html
  90   /*
  91     <img src="picts/AliTPCv2Tree.gif">
  92   */
  93   //End_Html
  94
  95
  96   Int_t *idtmed = fIdtmed->GetArray();
  97
  98   Float_t dm[50];
  99   Int_t idrotm[120];
 100
 101   Int_t nRotMat = 0;
 102
 103   Int_t i,ifl1=0;
 104
 105   // number of sectors
 106
 107   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
 108   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
 109
 110   // ---------------------------------------------------
 111   //        sector specification check
 112   // ---------------------------------------------------
 113   if (fSecAL >= 0) {
 114     ifl1 = 0;
 115
 116     for (i = 0; i < 6; ++i) {
 117       if (fSecLows[i] >= 0 && fSecLows[i] < 2*nInnerSector) {
 118        ifl1 = 1;
 119        AliInfo(Form("*** SECTOR %d selected",fSecLows[i]));
 120       }
 121     }
 122
 123   } else {
 124     AliInfo("*** ALL LOWER SECTORS SELECTED ***");
 125     ifl1 = 1;
 126   }
 127
 128   if (ifl1 == 0) {
 129     AliError("*** AT LEAST ONE LOWER SECTOR MUST BE SPECIFIED ***");
 130     AliError("!!! PROGRAM STOPPED !!!");
 131     exit(1);
 132   }
 133
 134   if (fSecAU >= 0) {
 135
 136     for (i = 0; i < 12; ++i) {
 137       if (fSecUps[i] > 2*nInnerSector-1 &&
 138           fSecUps[i] < 2*(nInnerSector+nOuterSector)) {
 139         AliInfo(Form("*** SECTOR %d selected",fSecUps[i]));
 140       }
 141     }
 142
 143   } else {
 144     AliInfo("*** ALL UPPER SECTORS SELECTED ***");
 145   }
 146
 147
 148
 149   //--------------------------------------------------------------------
 150
 151   //
 152   //  Mother volume TPC (Air) - all volumes will be positioned in it
 153   //
 154
 155   dm[0]=0.;
 156   dm[1]=360.;
 157   dm[2]=8.;
 158
 159   //
 160
 161   dm[3]=-283.7;
 162   dm[4]=77.017;
 163   dm[5]=278.;
 164
 165   //
 166
 167   dm[6]=-253.6;
 168   dm[7]=65.6;
 169   dm[8]=278.;
 170
 171   //
 172
 173   dm[9]=-73.3;
 174   dm[10]=60.9;
 175   dm[11]=278.;
 176
 177   //
 178
 179   dm[12]=-73.3;
 180   dm[13]=56.9;
 181   dm[14]=278.;
 182
 183   //
 184
 185   dm[15]=73.3;
 186   dm[16]=56.9;
 187   dm[17]=278.;
 188
 189   //
 190
 191   dm[18]=73.3;
 192   dm[19]=60.9;
 193   dm[20]=278.;
 194
 195   //
 196
 197   dm[21]=253.6;
 198   dm[22]=65.6;
 199   dm[23]=278.;
 200
 201   //
 202
 203   dm[24]=283.7;
 204   dm[25]=77.017;
 205   dm[26]=278.;
 206
 207   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,27);
 208
 209   // outer part
 210
 211   //-------------------------------------------------------------------
 212   //   Tpc Outer INsulator (CO2) - contains cont. vessel and field cage
 213   //-------------------------------------------------------------------
 214
 215   dm[0]= 0.;
 216   dm[1]= 360.;
 217   dm[2]= 6.;
 218
 219   //
 220
 221   dm[3]=-253.6;
 222   dm[4]=258.;
 223   dm[5]=275.5;
 224
 225   //
 226
 227   dm[6]=-250.6;
 228   dm[7]=258.;
 229   dm[8]=275.5;
 230
 231   //
 232
 233   dm[9]=-250.6;
 234   dm[10]=258.;
 235   dm[11]=278.;
 236
 237   //
 238
 239   dm[12]=253.6;
 240   dm[13]=258.;
 241   dm[14]=278.;
 242
 243   //
 244
 245   dm[15]=253.6;
 246   dm[16]=264.8;
 247   dm[17]=278.;
 248
 249   //
 250
 251   dm[18]=256.6;
 252   dm[19]=264.8;
 253   dm[20]=278.;
 254
 255   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
 256
 257   //----------------------------------------------------------------
 258   // Tpc Outer Contaiment Vessel
 259   //  mother volume - Al, daughters - composite (sandwich)
 260   //----------------------------------------------------------------
 261
 262   dm[0]=0.;
 263   dm[1]=360.;
 264   dm[2]=6.;
 265
 266   //
 267
 268   dm[3]=-250.6;
 269   dm[4]=270.4;
 270   dm[5]=278.;
 271
 272   //
 273
 274   dm[6]=-247.6;
 275   dm[7]=270.4;
 276   dm[8]=278.;
 277
 278   //
 279
 280   dm[9]=-247.6;
 281   dm[10]=274.8124;
 282   dm[11]=278.;
 283
 284   //
 285
 286   dm[12]=253.6;
 287   dm[13]=274.8124;
 288   dm[14]=278.;
 289
 290   //
 291
 292   dm[15]=253.6;
 293   dm[16]=264.8;
 294   dm[17]=278.;
 295
 296   //
 297
 298   dm[18]=256.6;
 299   dm[19]=264.8;
 300   dm[20]=278.;
 301
 302   gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,21);
 303
 304   // Daughter volumes - sandwich
 305
 306   // Tpc SAndwich 1 - Al
 307
 308   dm[0]=274.8124;
 309   dm[1]=278.;
 310   dm[2]=252.1;
 311
 312   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
 313
 314   // Tpc SAndwich 2 - epoxy glue (I use Lexan)
 315
 316   dm[0] += 5.e-3;
 317   dm[1] -= 5.e-3;
 318
 319   gMC->Gsvolu("TSA2","TUBE",idtmed[14],dm,3);
 320
 321   // Tpc SAndwich 3 - Tedlar
 322
 323   dm[0] += 0.01;
 324   dm[1] -= 0.01;
 325
 326   gMC->Gsvolu("TSA3","TUBE",idtmed[9],dm,3);
 327
 328
 329   // Tpc SAndwich 4 - fiber glass (G10)
 330
 331   dm[0] += 3.8e-3;
 332   dm[1] -= 3.8e-3;
 333
 334   gMC->Gsvolu("TSA4","TUBE",idtmed[12],dm,3);
 335
 336   // Tpc SAndwich 5 - NOMEX honeycomb
 337
 338   dm[0] += 0.075;
 339   dm[1] -= 0.075;
 340
 341   gMC->Gsvolu("TSA5","TUBE",idtmed[6],dm,3);
 342
 343   // 5->4->3->2->1->TCOV
 344
 345
 346   gMC->Gspos("TSA5",1,"TSA4",0.,0.,0.,0,"ONLY");
 347   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
 348   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
 349   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");
 350
 351   gMC->Gspos("TSA1",1,"TOCV",0.,0.,3.,0,"ONLY");
 352
 353   // TCOV-> TOIN
 354
 355   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
 356
 357   //-------------------------------------------------------
 358   //  Tpc Outer Field Cage
 359   //  mother volume - Al, daughters - composite (sandwich)
 360   //-------------------------------------------------------
 361
 362   dm[0]=0.;
 363   dm[1]=360.;
 364   dm[2]=6.;
 365
 366   //
 367
 368   dm[3]=-253.6;
 369   dm[4]=258.;
 370   dm[5]=275.5;
 371
 372   //
 373
 374   dm[6]=-250.6;
 375   dm[7]=258.;
 376   dm[8]=275.5;
 377
 378   //
 379
 380   dm[9]=-250.6;
 381   dm[10]=258.;
 382   dm[11]=260.0476;
 383
 384   //
 385
 386   dm[12]=250.6;
 387   dm[13]=258.;
 388   dm[14]=260.0476;
 389
 390   //
 391
 392   dm[15]=250.6;
 393   dm[16]=258.;
 394   dm[17]=269.6;
 395
 396   //
 397
 398   dm[18]=253.6;
 399   dm[19]=258.;
 400   dm[20]=269.6;
 401
 402   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
 403
 404   // Daughter volumes
 405
 406   // Tpc SAndwich 6 - Tedlar
 407
 408   dm[0]= 258.;
 409   dm[1]= 260.0476;
 410   dm[2]= 252.1;
 411
 412   gMC->Gsvolu("TSA6","TUBE",idtmed[9],dm,3);
 413
 414   // Tpc SAndwich 7 - fiber glass
 415
 416   dm[0] += 3.8e-3;
 417   dm[1] -= 3.8e-3;
 418
 419   gMC->Gsvolu("TSA7","TUBE",idtmed[12],dm,3);
 420
 421
 422   // Tpc SAndwich 8 - NOMEX
 423
 424   dm[0] += 0.02;
 425   dm[1] -= 0.02;
 426
 427   gMC->Gsvolu("TSA8","TUBE",idtmed[6],dm,3);
 428
 429   // 8->7->6->TOFC
 430
 431   gMC->Gspos("TSA8",1,"TSA7",0.,0.,0.,0,"ONLY");
 432   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY");
 433   gMC->Gspos("TSA6",1,"TOFC",0.,0.,0.,0,"ONLY");
 434
 435   // TOFC->TOIN
 436   // TOFC overlaps with
 437
 438   gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
 439
 440   // TOIN->TPC
 441
 442   gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 443
 444   // inner part
 445
 446   //--------------------------------------------------------------------
 447   // Tpc Inner INsulator (CO2) - inner f.c. will be placed there
 448   // Inner containment vessel will be placed directly in the TPC
 449   //--------------------------------------------------------------------
 450
 451   dm[0]=0.;
 452   dm[1]=360.;
 453   dm[2]=4.;
 454
 455   //
 456
 457   dm[3]=-253.6;
 458   dm[4]=65.9;
 459   dm[5]=79.2;
 460
 461   //
 462
 463   dm[6]=-73.3;
 464   dm[7]=61.2;
 465   dm[8]=79.2;
 466
 467   //
 468
 469   dm[9]=73.3;
 470   dm[10]=61.2;
 471   dm[11]=79.2;
 472
 473   //
 474
 475   dm[12]=253.6;
 476   dm[13]=65.9;
 477   dm[14]=79.2;
 478
 479   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,15);
 480
 481   // the middle part of the F.C. is thinner - carve out the strip - Ne-CO2
 482
 483   dm[0]=79.16;
 484   dm[1]=79.2;
 485   dm[2]=88.;
 486
 487   gMC->Gsvolu("TII1","TUBE",idtmed[1],dm,3);
 488
 489   gMC->Gspos("TII1",1,"TIIN",0.,0.,0.,0,"ONLY");
 490
 491   //-----------------------------------------------------
 492   // Tpc Inner Field Cage
 493   // mother volume - Al, daughters - composite (sandwich)
 494   //------------------------------------------------------
 495
 496   dm[0]=0.;
 497   dm[1]=360.;
 498   dm[2]=10.;
 499
 500   //
 501
 502   dm[3]=-253.6;
 503   dm[4]=70.3;
 504   dm[5]=79.2;
 505
 506   //
 507
 508   dm[6]=-250.6;
 509   dm[7]=70.3;
 510   dm[8]=79.2;
 511
 512   //
 513
 514   dm[9]=-250.6;
 515   dm[10]=77.0524;
 516   dm[11]=79.2;
 517
 518   //
 519
 520   dm[12]=-88.;
 521   dm[13]=77.0524;
 522   dm[14]=79.2;
 523
 524   //
 525
 526   dm[15]=-88.;
 527   dm[16]=77.0924;
 528   dm[17]=79.16;
 529
 530   //
 531
 532   dm[18]=88.;
 533   dm[19]=77.0924;
 534   dm[20]=79.16;
 535
 536   //
 537
 538   dm[21]=88.;
 539   dm[22]=77.0524;
 540   dm[23]=79.2;
 541
 542   //
 543
 544   dm[24]=250.6;
 545   dm[25]=77.0524;
 546   dm[26]=79.2;
 547
 548   //
 549
 550   dm[27]=250.6;
 551   dm[28]=70.3;
 552   dm[29]=79.2;
 553
 554   //
 555
 556   dm[30]=253.6;
 557   dm[31]=70.3;
 558   dm[32]=79.2;
 559
 560   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,33);
 561
 562   // daughter volumes - central part
 563
 564   // Tpc Sandwich 9 -Tedlar
 565
 566   dm[0]=77.0924;
 567   dm[1]=79.16;
 568   dm[2]=88.;
 569
 570   gMC->Gsvolu("TSA9","TUBE",idtmed[9],dm,3);
 571
 572   // Tpc Sandwich 10 - fiber glass (G10)
 573
 574   dm[0] += 3.8e-3;
 575   dm[1] -= 3.8e-3;
 576
 577   gMC->Gsvolu("TS10","TUBE",idtmed[12],dm,3);
 578
 579   // Tpc Sandwich 11 - NOMEX
 580
 581   dm[0] += 0.03;
 582   dm[1] -= 0.03;
 583
 584   gMC->Gsvolu("TS11","TUBE",idtmed[6],dm,3);
 585
 586   // 11->10->9->TIFC
 587
 588   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
 589   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
 590
 591   gMC->Gspos("TSA9",1,"TIFC",0.,0.,0.,0,"ONLY");
 592
 593   // daughter volumes - outer parts (reinforced)
 594
 595   // Tpc Sandwich 12 -Tedlar
 596
 597   dm[0]=77.0524;
 598   dm[1]=79.2;
 599   dm[2]=82.05;
 600
 601   gMC->Gsvolu("TS12","TUBE",idtmed[9],dm,3);
 602
 603   // Tpc Sandwich 13 - fiber glass (G10)
 604
 605   dm[0] += 3.8e-3;
 606   dm[1] -= 3.8e-3;
 607
 608   gMC->Gsvolu("TS13","TUBE",idtmed[12],dm,3);
 609
 610   // Tpc Sandwich 14 - NOMEX
 611
 612   dm[0] += 0.07;
 613   dm[1] -= 0.07;
 614
 615   gMC->Gsvolu("TS14","TUBE",idtmed[6],dm,3);
 616
 617   // 14->13->12->TIFC
 618
 619   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
 620   gMC->Gspos("TS13",1,"TS12",0.,0.,0.,0,"ONLY");
 621
 622   gMC->Gspos("TS12",1,"TIFC",0.,0.,170.05,0,"ONLY");
 623   gMC->Gspos("TS12",2,"TIFC",0.,0.,-170.05,0,"ONLY");
 624
 625   // place this inside the inner insulator
 626
 627   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
 628
 629   // and now in the TPC...
 630
 631   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 632
 633   //---------------------------------------------------------
 634   // Tpc Inner Containment vessel - Cones
 635   //---------------------------------------------------------
 636
 637   dm[0]=0.;
 638   dm[1]=360.;
 639   dm[2]=8.;
 640
 641   //
 642
 643   dm[3]=71.8;
 644   dm[4]=56.9;
 645   dm[5]=59.4;
 646
 647   //
 648
 649   dm[6]=73.;
 650   dm[7]=56.9;
 651   dm[8]=59.4;
 652
 653   //
 654
 655   dm[9]=73.;
 656   dm[10]=56.9;
 657   dm[11]=61.2;
 658
 659   //
 660
 661   dm[12]=73.3;
 662   dm[13]=56.9;
 663   dm[14]=61.2;
 664
 665   //
 666
 667   dm[15]=73.3;
 668   dm[16]=60.9;
 669   dm[17]=61.2;
 670
 671   //
 672
 673   dm[18]=253.6;
 674   dm[19]=65.6;
 675   dm[20]=65.9;
 676
 677   //
 678
 679   dm[21]=253.6;
 680   dm[22]=65.6;
 681   dm[23]=74.6;
 682
 683   //
 684
 685   dm[24]=256.6;
 686   dm[25]=65.6;
 687   dm[26]=74.6;
 688
 689   gMC->Gsvolu("TICC","PCON",idtmed[4],dm,27);
 690
 691   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
 692
 693   // reflection matrix
 694
 695   theta1 = 90.;
 696   phi1   = 0.;
 697   theta2 = 90.;
 698   phi2   = 270.;
 699   theta3 = 180.;
 700   phi3   = 0.;
 701
 702   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 703
 704   gMC->Gspos("TICC",1,"TPC ",0.,0.,0.,0,"ONLY");
 705   gMC->Gspos("TICC",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 706
 707
 708   //---------------------------------------------------------
 709   // Tpc Inner Containment vessel - Middle part -Al
 710   //---------------------------------------------------------
 711
 712   dm[0]=0.;
 713   dm[1]=360.;
 714   dm[2]=6.;
 715
 716   //
 717
 718   dm[3]=-71.6;
 719   dm[4]=60.2;
 720   dm[5]=61.2;
 721
 722   //
 723
 724   dm[6]=-69.1;
 725   dm[7]=60.2;
 726   dm[8]=61.2;
 727
 728   //
 729
 730   dm[9]=-69.1;
 731   dm[10]=60.6224;
 732   dm[11]=61.2;
 733
 734   //
 735
 736   dm[12]=69.1;
 737   dm[13]=60.6224;
 738   dm[14]=61.2;
 739
 740   //
 741
 742   dm[15]=69.1;
 743   dm[16]=60.2;
 744   dm[17]=61.2;
 745
 746   //
 747
 748   dm[18]=71.6;
 749   dm[19]=60.2;
 750   dm[20]=61.2;
 751
 752   gMC->Gsvolu("TICM","PCON",idtmed[4],dm,21);
 753
 754   // Tpc Sandwich 15 - Al
 755
 756   dm[0]=60.6224;
 757   dm[1]=61.2;
 758   dm[2]=70.1;
 759
 760   gMC->Gsvolu("TS15","TUBE",idtmed[4],dm,3);
 761
 762   // Tpc Sandwich 16 -  epoxy glue
 763
 764   dm[0] += 5.e-3;
 765   dm[1] -= 5.e-3;
 766
 767   gMC->Gsvolu("TS16","TUBE",idtmed[14],dm,3);
 768
 769   // Tpc Sandwich 17 - Tedlar
 770
 771   dm[0] += 0.01;
 772   dm[1] -= 0.01;
 773
 774   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
 775
 776   // Tpc Sandwich 18 - carbon fiber
 777
 778   dm[0] += 3.8e-3;
 779   dm[1] -= 3.8e-3;
 780
 781   gMC->Gsvolu("TS18","TUBE",idtmed[15],dm,3);
 782
 783   // Tpc Sandwich 19 - Nomex
 784
 785   dm[0] += 0.02;
 786   dm[1] -= 0.02;
 787
 788   gMC->Gsvolu("TS19","TUBE",idtmed[6],dm,3);
 789
 790   // 19->18->17->16->15-> TICM
 791
 792   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY");
 793   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
 794   gMC->Gspos("TS17",1,"TS16",0.,0.,0.,0,"ONLY");
 795   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
 796
 797   gMC->Gspos("TS15",1,"TICM ",0.,0.,0.,0,"ONLY");
 798
 799
 800   // TPc inner cont. vessel Joints
 801
 802   dm[0]=60.2;
 803   dm[1]=61.2;
 804   dm[2]=0.5;
 805
 806   gMC->Gsvolu("TPJ1","TUBE",idtmed[4],dm,3);
 807
 808   gMC->Gspos("TPJ1",1,"TPC ",0.,0.,72.3,0,"ONLY");
 809   gMC->Gspos("TPJ1",2,"TPC ",0.,0.,-72.3,0,"ONLY");
 810
 811   //
 812
 813   dm[0]=0.;
 814   dm[1]=360.;
 815   dm[2]=4.;
 816
 817   //
 818
 819   dm[3]=70.8;
 820   dm[4]=58.4;
 821   dm[5]=60.1;
 822
 823   //
 824
 825   dm[6]=71.2;
 826   dm[7]=58.4;
 827   dm[8]=60.1;
 828
 829   //
 830
 831   dm[9]=71.2;
 832   dm[10]=58.4;
 833   dm[11]=59.4;
 834
 835   //
 836
 837   dm[12]=71.6;
 838   dm[13]=58.4;
 839   dm[14]=59.4;
 840
 841   gMC->Gsvolu("TPJ2","PCON",idtmed[4],dm,15);
 842
 843   gMC->Gspos("TPJ2",1,"TPC ",0.,0.,0.,0,"ONLY");
 844   gMC->Gspos("TPJ2",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 845
 846
 847
 848   // Tpc Inner Containment vessel Seal (Viton, I use Lexan for a time being)
 849
 850   dm[0]=58.4;
 851   dm[1]=61.2;
 852   dm[2]=0.1;
 853
 854   gMC->Gsvolu("TICS","TUBE",idtmed[14],dm,3);
 855
 856   gMC->Gspos("TICS",1,"TPC ",0.,0.,71.7,0,"ONLY");
 857   gMC->Gspos("TICS",2,"TPC ",0.,0.,-71.7,0,"ONLY");
 858
 859   // TICM -> TPC
 860
 861   gMC->Gspos("TICM",1,"TPC ",0.,0.,0.,0,"ONLY");
 862
 863   //
 864
 865   nRotMat++; // prepare for the next rotation matrix
 866
 867   //---------------------------------------------------------
 868   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
 869   //  and its daughters (HV membrane, rods, readout chambers)
 870   //---------------------------------------------------------
 871
 872   dm[0]= 79.2;
 873   dm[1]= 258.0;
 874   dm[2]= 253.6;
 875
 876   gMC->Gsvolu("TDGN","TUBE",idtmed[1],dm,3);
 877
 878   // sector opening angles
 879
 880   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
 881   Float_t outerOpenAngle = fTPCParam->GetOuterAngle();
 882
 883   // sector angle shift
 884
 885   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
 886
 887
 888   // All above parameters are identical for inner and outer
 889   // sectors. The distinction is kept for the historical reasons
 890   // and eventually will disappear.
 891
 892   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
 893   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
 894   Float_t space;
 895
 896   //-------------------------------------------------------------------------
 897   //   Tpc Inner Readout Chambers
 898   //-------------------------------------------------------------------------
 899
 900   dm[0]= 14.483;
 901   dm[1]= 23.3345;
 902   dm[2]= 1.6; // thickness
 903   dm[3]= 25.1;
 904
 905   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
 906
 907   // this volume will be positioned in the empty space
 908   // of the end-cap to avoid overlaps
 909
 910   dm[0]= 13.7305;
 911   dm[1]= 21.1895;
 912   dm[2]= 2.25;
 913   dm[3]= 21.15;
 914
 915   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
 916
 917
 918   //------------------------------------------------
 919   // Tpc Inner readout chamber Pad Plane
 920   //------------------------------------------------
 921
 922   dm[0]= 14.483;
 923   dm[1]= 23.3345;
 924   dm[2]= 0.5;
 925   dm[3]= 25.1;
 926
 927   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
 928
 929   //
 930
 931   dm[0] -= 1.218511934;
 932   dm[1] -= 1.218511934;
 933   dm[2] = 0.35;
 934
 935   gMC->Gsvolu("TIC3","TRD1",idtmed[1],dm,4);
 936
 937   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
 938
 939   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
 940
 941
 942   //----------------------------------------------
 943   // Tpc Readout Chambers Empty spaces - for both
 944   // inner and outer sectors
 945   //----------------------------------------------
 946
 947   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
 948
 949   // Inner sector - 4 spaces
 950
 951
 952   dm[3] = 4.7625;
 953   dm[0] = 12.472;
 954
 955   Float_t rr = 90.52;
 956   Float_t zz;
 957
 958   zz= -12.7875;
 959
 960   space = rr*tanAlpha-dm[0];
 961
 962   for(Int_t nsLow=0;nsLow<4;nsLow++){
 963
 964     rr += 9.525;
 965     dm[1]= rr*tanAlpha - space;
 966
 967     dm[2]=0.8;
 968
 969     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
 970
 971     //
 972
 973     dm[2] = 1.2;
 974
 975     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
 976
 977     rr += 0.4;
 978     dm[0] = rr*tanAlpha - space;
 979     zz += (0.4+9.525);
 980
 981   }
 982
 983   dm[0]= 12.472;
 984   // dm[1] - this is the dm[1] from the previous TRCE
 985   dm[2]= 1.05;
 986   dm[3]= 19.65;
 987
 988   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.2,0.,0,"ONLY",dm,4);
 989
 990   //
 991   // TPc Space for Connectors
 992   //
 993
 994   dm[0]= .3;
 995   dm[1]= .3;
 996   dm[2]= 4.5;
 997
 998   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
 999
1000   // TPC Connectors
1001
1002   dm[0]= .25;
1003   dm[1]= .15;
1004   dm[2]= 3.75;
1005
1006   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3);
1007
1008   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1009
1010   zz = -12.7875;
1011
1012
1013   Float_t alpha;
1014   Float_t astep;
1015
1016   // inner part of the inner sector - 2 x 20 holes
1017
1018   astep = 20.00096874/19.;
1019
1020   alpha = 10.00048437-astep;
1021
1022   Float_t x1,x2;
1023
1024     x1 = 13.31175725;
1025     x1 -= 0.996357832;
1026
1027     x2 = 15.06180253;
1028     x2 -= 1.163028812;
1029
1030   Int_t ncon;
1031
1032   for(ncon=0;ncon<20;ncon++){
1033
1034     phi1 = 0.;
1035     theta1 = 90.+alpha;
1036     phi2=90.;
1037     theta2 = 90.;
1038     phi3 = (alpha>0) ? 0. : 180.;
1039     theta3 = TMath::Abs(alpha);
1040
1041     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1042
1043
1044
1045     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1046     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1047
1048
1049     x1 -= 1.296357833;
1050     x2 -= 1.463028812;
1051
1052     alpha -= astep;
1053     nRotMat++;
1054
1055   }
1056
1057   // outer part of the inner sector - 2 x 25 holes
1058
1059    astep = 20.00096874/24.;
1060    alpha = 10.00048437-astep;
1061
1062    x1 = 16.81184781;
1063    x1 -= 1.016295986;
1064
1065    x2 = 18.5618931;
1066    x2 -= 1.150914854;
1067
1068   for(ncon=0;ncon<25;ncon++){
1069
1070     phi1 = 0.;
1071     theta1 = 90.+alpha;
1072     phi2=90.;
1073     theta2 = 90.;
1074     phi3 = (alpha>0) ? 0. : 180.;
1075     theta3 = TMath::Abs(alpha);
1076
1077     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1078
1079
1080
1081     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1082     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1083
1084
1085     x1 -= 1.316295986;
1086     x2 -= 1.450914854;
1087
1088     alpha -= astep;
1089     nRotMat++;
1090
1091   }
1092
1093   //--------------------------------------------------------------------------
1094   //  TPC Outer Readout Chambers
1095   //  this is NOT a final design
1096   //--------------------------------------------------------------------------
1097
1098   dm[0]= 23.3875;
1099   dm[1]= 43.524;
1100   dm[2]= 1.5; //thickness
1101   dm[3]= 57.1;
1102
1103   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1104
1105   //------------------------------------------------
1106   // Tpc Outer readout chamber Pad Plane
1107   //------------------------------------------------
1108
1109   dm[2]= 0.5;
1110
1111   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1112
1113   dm[0] -= 1.218511934;
1114   dm[1] -= 1.218511934;
1115   dm[2] = 0.35;
1116
1117   gMC->Gsvolu("TOC3","TRD1",idtmed[1],dm,4);
1118
1119   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1120
1121   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1122
1123   // empty space
1124
1125   dm[0]= 21.035;
1126   dm[1]= 38.7205;
1127   dm[2]= 0.7;
1128   dm[3]= 50.15;
1129
1130   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);
1131
1132   dm[0]= 22.2935;
1133   dm[1]= 40.5085;
1134   dm[2]= 2.25;
1135   dm[3]= 51.65;
1136
1137   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1138
1139   dm[0]= 21.35;
1140   dm[1]= 38.7205;
1141   dm[2]= 2.25;
1142   dm[3]= 50.15;
1143
1144   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1145
1146   //-----------------------------------------------
1147   // Tpc Services Support Wheel
1148   //-----------------------------------------------
1149
1150   dm[0]=0.;
1151   dm[1]=360.;
1152   dm[2]=18.;
1153   dm[3]=2.;
1154
1155   dm[4]= -5.;
1156   dm[5]= 77.017;
1157   dm[6]= 255.267;
1158
1159   dm[7]= 5.;
1160   dm[8]= dm[5];
1161   dm[9]= dm[6];
1162
1163   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1164
1165   // Tpc Services Wheel Cover
1166
1167   dm[4]= -0.5;
1168   dm[7]= 0.5;
1169
1170   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1171
1172   // Tpc Service wheel Cover Empty space
1173
1174   dm[0]= 10.99;
1175   dm[1]= 39.599;
1176   dm[2]= .5;
1177   dm[3]= 81.125;
1178
1179   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1180
1181   // Tpc services Wheel Empty Spaces
1182
1183   dm[0]= 13.18017507;
1184   dm[1]= 44.61045938;
1185   dm[2]= 4.;
1186   dm[3]= 89.125;
1187
1188   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1189
1190   // Tpc Services Wheel Bars
1191
1192   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1193
1194   // bars-> TWES
1195
1196   dm[2]= 4.;
1197   dm[3]= .4;
1198
1199   dm[0]= 13.8149522;
1200   dm[1]= 13.95601379;
1201
1202   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1203
1204   dm[0]= 43.83462067;
1205   dm[1]= 43.97568225;
1206
1207   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1208
1209   // TPc ELectronics - right now 30% X0 Si
1210
1211   dm[0]= 14.03813696;
1212   dm[1]= 43.3524075;
1213   dm[2]= 1.404;
1214   dm[3]= 83.125;
1215
1216   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1217   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1218
1219   //--------------------------------------------------------------------------
1220   //  End caps
1221   //--------------------------------------------------------------------------
1222
1223   // TPc Main Wheel - Al
1224
1225   dm[0]= 74.9;
1226   dm[1]= 264.4;
1227   dm[2]= 3.0;
1228
1229   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1230
1231   //--------------------------------------------------------------------------
1232   //  Tpc Empty Space for the Readout chambers
1233   //--------------------------------------------------------------------------
1234
1235   Float_t rLow= 86.2;
1236   Float_t rUp= 243.5;
1237   Float_t dR = 0.5*(rUp-rLow);
1238
1239   space= 1.5/cosAlpha; // wheel ribs are 3.0 cm wide
1240
1241   dm[0]= rLow*tanAlpha-space;
1242   dm[1]= rUp*tanAlpha-space;
1243   dm[2] = 3.0;
1244   dm[3]= dR;
1245
1246   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1247
1248   // TIC1->TESR
1249
1250   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1251
1252   // TOC1->TESR
1253
1254   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1255
1256   // Tpc Empty Space Bars - Al (daughters of TESR)
1257
1258   Float_t zBar;
1259
1260   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1261
1262   // lower bar
1263
1264   dm[0]= rLow*tanAlpha-space;
1265   dm[1]= 88.7*tanAlpha-space;
1266   dm[2]= 2.25;
1267   dm[3]= 1.275;
1268
1269   zBar = -dR+dm[3];
1270
1271   gMC->Gsposp("TESB",1,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1272
1273   // middle bar
1274
1275   dm[0]= 131.65*tanAlpha-space;
1276   dm[1]= 136.5*tanAlpha-space;
1277   dm[3]= 2.425;
1278
1279   zBar = -dR +131.65+dm[3]-rLow;
1280
1281   gMC->Gsposp("TESB",2,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1282
1283   // upper bar
1284
1285   dm[0]= 240.4*tanAlpha-space;
1286   dm[1]= rUp*tanAlpha-space;
1287   dm[3]= 1.55;
1288
1289   zBar = dR-dm[3];
1290
1291   gMC->Gsposp("TESB",3,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1292
1293   //------------------------------------------------------
1294   //  TPc Lower "S" Sectors
1295   //------------------------------------------------------
1296
1297
1298   Float_t inSecLowEdge = fTPCParam->GetInnerRadiusLow();
1299   Float_t inSecUpEdge =  fTPCParam->GetInnerRadiusUp();
1300
1301   dm[0] = inSecLowEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1302   dm[1] = inSecUpEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1303   dm[2] = 0.5*(250. - 5.e-3);
1304   dm[3] = 0.5*(inSecUpEdge-inSecLowEdge);
1305
1306   gMC->Gsvolu("TPLS", "TRD1", idtmed[2], dm, 4); // sensitive
1307
1308
1309   //----------------------------------------------------------
1310   //  TPc Upper Sectors
1311   //----------------------------------------------------------
1312
1313   Float_t ouSecLowEdge = fTPCParam->GetOuterRadiusLow();
1314   Float_t ouSecUpEdge = fTPCParam->GetOuterRadiusUp();
1315
1316   dm[0] = ouSecLowEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;
1317   dm[1] = ouSecUpEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;
1318   dm[2] = 0.5*(250. - 5.e-3);
1319   dm[3] = 0.5*(ouSecUpEdge-ouSecLowEdge);
1320
1321   gMC->Gsvolu("TPUS", "TRD1", idtmed[2], dm, 4); // sensitive
1322
1323
1324
1325   // sensitive strips
1326
1327     gMC->Gsvolu("TPSS","TRD1",idtmed[2],dm,0); // sensitive
1328
1329     Int_t nofStrips,nstr;
1330     Float_t r1,r2,zs;
1331     Float_t stripThick = 0.01; // 100 microns
1332     Float_t deadSpace;
1333
1334     // inner sector
1335
1336
1337     // if all lower sectors selected define only 1 strip
1338
1339     nofStrips=((fSecAL <0)||(fSecAL>=0 && fSens<0)) ? 1 : fTPCParam->GetNRowLow();
1340     deadSpace = fTPCParam->GetInnerWireMount();
1341
1342     dm[2] = 0.5*(250. - 5.e-3);
1343     dm[3] = 0.5 * stripThick;
1344
1345     for(nstr=0;nstr<nofStrips;nstr++){
1346
1347       r1 = fTPCParam->GetPadRowRadiiLow(nstr);
1348       r2 = r1 + stripThick;
1349       dm[0] = r1 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1350       dm[1] = r2 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1351       zs = -inSecLowEdge -0.5*(inSecUpEdge-inSecLowEdge);
1352       zs += r1;
1353       zs += dm[3];
1354
1355       gMC->Gsposp("TPSS", nstr+1, "TPLS", 0., 0., zs, 0, "ONLY", dm, 4);
1356
1357
1358     }
1359
1360     // strips only if several upper sectors selected end fSens > 0
1361
1362     if(fSecAU >=0 && fSens >0){
1363
1364     Int_t nsSave = nofStrips;
1365
1366     // outer sector
1367
1368     nofStrips = fTPCParam->GetNRowUp();
1369     deadSpace = fTPCParam->GetOuterWireMount();
1370
1371     dm[2] = 0.5*(250. - 5.e-3);
1372     dm[3] = 0.5 * stripThick;
1373
1374
1375     for(nstr=0;nstr<nofStrips;nstr++){
1376
1377       r1 = fTPCParam->GetPadRowRadiiUp(nstr);
1378       r2 = r1 + stripThick;
1379       dm[0] = r1 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1380       dm[1] = r2 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1381       zs = -ouSecLowEdge -0.5*(ouSecUpEdge-ouSecLowEdge);
1382       zs += r1;
1383       zs += dm[3];
1384
1385       gMC->Gsposp("TPSS", nstr+1+nsSave, "TPUS", 0., 0., zs, 0, "ONLY", dm, 4);
1386
1387      }
1388     }
1389
1390
1391   //-------------------------------------------------------
1392   //  positioning of the empty spaces into the main wheel
1393   //  and readout chambers and sectors into the drift gas
1394   //-------------------------------------------------------
1395
1396   Float_t rCenter,xc,yc;
1397   Float_t rInner,rOuter; // center of the inner and outer chamber
1398
1399   rCenter = rLow+dR;
1400
1401   rInner = 108.07;
1402   rOuter = 190.68;
1403
1404
1405   for(Int_t ns=0; ns<nInnerSector;ns++){
1406
1407     phi1 = ns * innerOpenAngle + innerAngleShift;
1408     phi1 *= kRaddeg; // in degrees
1409
1410     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1411
1412     if (phi1 > 360.) phi1 -= 360.;
1413
1414     theta1 = 90.;
1415     phi2   = 90.;
1416     theta2 = 180.;
1417     phi3   = ns * innerOpenAngle + innerAngleShift;
1418     phi3 *= kRaddeg; // in degrees
1419
1420     phi3 = (Float_t)TMath::Nint(phi3);
1421
1422     if(phi3 > 360.) phi3 -= 360.;
1423
1424     theta3 = 90.;
1425
1426     // "holes"->End plate
1427
1428     xc = rCenter*TMath::Cos(phi3*kDegrad);
1429     yc = rCenter*TMath::Sin(phi3*kDegrad);
1430
1431     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1432
1433     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1434
1435     // TSCE->TSWC (services wheel volumes)
1436
1437     xc = 166.142*TMath::Cos(phi3*kDegrad);
1438     yc = 166.142*TMath::Sin(phi3*kDegrad);
1439
1440     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1441     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1442
1443
1444     // readout chambers->TDGN (drift gas)
1445
1446     xc = rInner*TMath::Cos(phi3*kDegrad);
1447     yc = rInner*TMath::Sin(phi3*kDegrad);
1448
1449     gMC->Gspos("TIRC",ns+1,"TDGN",xc,yc,252.,idrotm[nRotMat],"ONLY");
1450
1451     // here lower sectors
1452
1453     if(fSecAL <0){
1454
1455       // all lower sectors are positioned
1456
1457       gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1458       gMC->
1459         Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1460     }
1461     else{
1462
1463       // only selected sectors are positioned (up to 6 sectors)
1464
1465       for(Int_t sel=0;sel<6;sel++){
1466
1467         if(fSecLows[sel] == ns){
1468           gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1469         }
1470         else if(fSecLows[sel] == ns+nInnerSector){
1471          gMC->
1472          Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1473         }
1474       }
1475     } // lower sectors finished
1476
1477
1478     xc = rOuter*TMath::Cos(phi3*kDegrad);
1479     yc = rOuter*TMath::Sin(phi3*kDegrad);
1480
1481     gMC->Gspos("TORC",ns+1,"TDGN",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1482
1483     // here upper sectors
1484
1485     if(fSecAU <0){
1486
1487       // all upper sectors
1488
1489       gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1490       gMC->
1491         Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1492     }
1493     else{
1494
1495       // only selected sectors (up to 12)
1496
1497       for(Int_t sel=0;sel<12;sel++){
1498         if(fSecUps[sel] == ns+2*nInnerSector){
1499           gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1500         }
1501         else if(fSecUps[sel] == ns+2*nInnerSector+nOuterSector){
1502          gMC->
1503           Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1504         }
1505       }
1506     } // upper sectors finished
1507
1508
1509     nRotMat++;
1510
1511     theta2 = 0.; // reflection
1512
1513     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1514
1515     xc = rInner*TMath::Cos(phi3*kDegrad);
1516     yc = rInner*TMath::Sin(phi3*kDegrad);
1517
1518     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGN",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1519
1520     xc = rOuter*TMath::Cos(phi3*kDegrad);
1521     yc = rOuter*TMath::Sin(phi3*kDegrad);
1522
1523     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGN",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1524
1525     nRotMat++;
1526
1527   }
1528   // TPMW->TPC
1529
1530   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1531   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[0],"ONLY");
1532
1533   //---------------------------------------------------------
1534   //  Tpc High Voltage Membrane - 100 microns of mylar
1535   //---------------------------------------------------------
1536
1537   dm[0]=82.8;
1538   dm[1]=252.;
1539   dm[2]=0.005;
1540
1541   gMC->Gsvolu("THVM","TUBE",idtmed[8],dm,3);
1542
1543   gMC->Gspos("THVM",1,"TDGN",0.,0.,0.,0,"ONLY");
1544
1545   // Tpc High Voltage membrane Holders
1546
1547   gMC->Gsvolu("THVH","TUBE",idtmed[4],dm,0);
1548
1549
1550
1551   // inner
1552
1553   dm[0]=79.3;
1554   dm[1]=82.8;
1555   dm[2]=0.2;
1556
1557   gMC->Gsposp("THVH",1,"TDGN",0.,0.,0.,0,"ONLY",dm,3);
1558
1559   // outer
1560
1561   dm[0]= 252.;
1562   dm[1]= 257.9;
1563   dm[2]= 0.4;
1564
1565   gMC->Gsposp("THVH",2,"TDGN",0.,0.,0.,0,"ONLY",dm,3);
1566
1567   //----------------------------------------------------------
1568   // TPc Support Rods - MAKROLON
1569   //----------------------------------------------------------
1570
1571   dm[0]= 0.9;
1572   dm[1]= 1.2;
1573
1574   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,0); // inner and outer rods differ
1575
1576
1577   for(Int_t nrod=0;nrod<18;nrod++){
1578     Float_t angle=innerOpenAngle*(Float_t)nrod;
1579
1580     xc=81.5*TMath::Cos(angle);
1581     yc=81.5*TMath::Sin(angle);
1582
1583     dm[2]=126.7;
1584
1585     gMC->Gsposp("TPSR",nrod+1,"TDGN",xc,yc,126.9,0,"ONLY",dm,3);
1586     gMC->Gsposp("TPSR",nrod+19,"TDGN",xc,yc,-126.9,0,"ONLY",dm,3);
1587
1588     dm[2]=126.6;
1589
1590     xc=254.25*TMath::Cos(angle);
1591     yc=254.25*TMath::Sin(angle);
1592
1593     // rod number 54 contans the HV cable
1594
1595     if(nrod<17) {
1596       gMC->Gsposp("TPSR",nrod+37,"TDGN",xc,yc,127.,0,"ONLY",dm,3);
1597       gMC->Gsposp("TPSR",nrod+54,"TDGN",xc,yc,-127.,0,"ONLY",dm,3);
1598     }
1599
1600   }
1601
1602   //----------------------------------------------------------
1603   // Tpc High Voltage Rod - MAKROLON + Copper cable
1604   //----------------------------------------------------------
1605
1606   // rod with cable (Left)
1607
1608   dm[0]=0.;
1609   dm[1]=2.25;
1610   dm[2]=126.6;
1611
1612   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1613
1614   // HV cable
1615
1616   dm[0]=0.;
1617   dm[1]=0.3;
1618   dm[2]=126.6;
1619
1620   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);
1621
1622   // empty space
1623
1624   dm[0]=0.3;
1625   dm[1]=1.;
1626   dm[2]=126.6;
1627
1628   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1629
1630   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1631   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1632
1633   // rod without cable
1634
1635   dm[0]=1.8;
1636   dm[1]=2.25;
1637   dm[2]=126.6;
1638
1639   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1640
1641   gMC->Gspos("THVL",1,"TDGN",xc,yc,-127.,0,"ONLY");
1642   gMC->Gspos("THVR",1,"TDGN",xc,yc,127.,0,"ONLY");
1643
1644   gMC->Gspos("TDGN",1,"TPC ",0.,0.,0.,0,"ONLY");
1645
1646   // services wheel cover -> wheel
1647
1648
1649   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1650   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1651
1652
1653   // put the wheel into the TPC
1654
1655   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1656   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1657
1658   //
1659
1660   gMC->Gsord("TPMW",6);
1661   gMC->Gsord("TSSW",6);
1662   gMC->Gsord("TSWC",6);
1663   if(fSecAL >=0)  gMC->Gsord("TPLS",3);
1664   if(fSecAU >=0 && fSens >0)  gMC->Gsord("TPUS",3);
1665   gMC->Gsord("TDGN",6);
1666
1667   // put the TPC into ALIC (main mother volume)
1668
1669   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1670
1671
1672
1673 } // end of function
1674
1675 //_____________________________________________________________________________
1676 void AliTPCv2::DrawDetector()
1677 {
1678   //
1679   // Draw a shaded view of the Time Projection Chamber version 1
1680   //
1681
1682   // Set everything unseen
1683   gMC->Gsatt("*", "seen", -1);
1684   //
1685   // Set ALIC mother transparent
1686   gMC->Gsatt("ALIC","SEEN",0);
1687   //
1688   // Set the volumes visible
1689   //
1690
1691   gMC->Gsatt("TPC ","SEEN",0);
1692   gMC->Gsatt("TOIN","SEEN",1);
1693   gMC->Gsatt("TOIN","COLO",7);
1694   gMC->Gsatt("TOCV","SEEN",1);
1695   gMC->Gsatt("TOCV","COLO",4);
1696   gMC->Gsatt("TSA1","SEEN",0);
1697   gMC->Gsatt("TSA2","SEEN",0);
1698   gMC->Gsatt("TSA3","SEEN",0);
1699   gMC->Gsatt("TSA4","SEEN",0);
1700   gMC->Gsatt("TSA5","SEEN",0);
1701   gMC->Gsatt("TOFC","SEEN",1);
1702   gMC->Gsatt("TOFC","COLO",4);
1703   gMC->Gsatt("TSA6","SEEN",0);
1704   gMC->Gsatt("TSA7","SEEN",0);
1705   gMC->Gsatt("TSA8","SEEN",0);
1706   gMC->Gsatt("TIIN","SEEN",1);
1707   gMC->Gsatt("TIIN","COLO",7);
1708   gMC->Gsatt("TII1","SEEN",0);
1709   gMC->Gsatt("TIFC","SEEN",1);
1710   gMC->Gsatt("TIFC","COLO",4);
1711   gMC->Gsatt("TSA9","SEEN",0);
1712   gMC->Gsatt("TS10","SEEN",0);
1713   gMC->Gsatt("TS11","SEEN",0);
1714   gMC->Gsatt("TS12","SEEN",0);
1715   gMC->Gsatt("TS13","SEEN",0);
1716   gMC->Gsatt("TS14","SEEN",0);
1717   gMC->Gsatt("TICC","SEEN",0);
1718   gMC->Gsatt("TICM","SEEN",0);
1719   gMC->Gsatt("TS15","SEEN",0);
1720   gMC->Gsatt("TS16","SEEN",0);
1721   gMC->Gsatt("TS17","SEEN",0);
1722   gMC->Gsatt("TS18","SEEN",0);
1723   gMC->Gsatt("TS19","SEEN",0);
1724   gMC->Gsatt("TPJ1","SEEN",0);
1725   gMC->Gsatt("TPJ2","SEEN",0);
1726   gMC->Gsatt("TICS","SEEN",0);
1727   gMC->Gsatt("TDGN","SEEN",0);
1728   gMC->Gsatt("TIRC","SEEN",0);
1729   gMC->Gsatt("TIC1","SEEN",1);
1730   gMC->Gsatt("TIPP","SEEN",0);
1731   gMC->Gsatt("TIC3","SEEN",0);
1732   gMC->Gsatt("TRCE","SEEN",0);
1733   gMC->Gsatt("TPSC","SEEN",0);
1734   gMC->Gsatt("TPCC","SEEN",0);
1735   gMC->Gsatt("TORC","SEEN",0);
1736   gMC->Gsatt("TOPP","SEEN",0);
1737   gMC->Gsatt("TOC3","SEEN",0);
1738   gMC->Gsatt("TOC1","SEEN",1);
1739   gMC->Gsatt("TSSW","SEEN",1);
1740   gMC->Gsatt("TSWC","SEEN",1);
1741   gMC->Gsatt("TSSW","COLO",3);
1742   gMC->Gsatt("TSWC","COLO",3);
1743   gMC->Gsatt("TSCE","COLO",6);
1744   gMC->Gsatt("TSCE","SEEN",1);
1745   gMC->Gsatt("TWES","SEEN",0);
1746   gMC->Gsatt("TSWB","SEEN",0);
1747   gMC->Gsatt("TPEL","SEEN",0);
1748   gMC->Gsatt("TPMW","SEEN",1);
1749   gMC->Gsatt("TESR","SEEN",1);
1750   gMC->Gsatt("TPMW","COLO",12);
1751   gMC->Gsatt("TIC1","COLO",5);
1752   gMC->Gsatt("TOC1","COLO",5);
1753   gMC->Gsatt("TESB","SEEN",0);
1754   gMC->Gsatt("THVM","SEEN",1);
1755   gMC->Gsatt("THVM","COLO",11);
1756   gMC->Gsatt("THVH","SEEN",0);
1757   gMC->Gsatt("TPSR","SEEN",0);
1758   gMC->Gsatt("THVL","SEEN",0);
1759   gMC->Gsatt("THVC","SEEN",0);
1760   gMC->Gsatt("THVE","SEEN",0);
1761   gMC->Gsatt("THVR","SEEN",0);
1762   gMC->Gsatt("TPSS","SEEN",0);
1763   gMC->Gsatt("TPUS","SEEN",0);
1764   gMC->Gsatt("TPLS","SEEN",0);
1765
1766   //
1767   gMC->Gdopt("hide", "on");
1768   gMC->Gdopt("shad", "on");
1769   gMC->Gsatt("*", "fill", 7);
1770   gMC->SetClipBox(".");
1771   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1772   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1773   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1774   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1775   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1776   gMC->DefaultRange();
1777   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1778   gMC->Gdhead(1111, "Time Projection Chamber");
1779   gMC->Gdman(18, 4, "MAN");
1780   gMC->Gdopt("hide","off");
1781 }
1782
1783 //_____________________________________________________________________________
1784 void AliTPCv2::CreateMaterials()
1785 {
1786   //
1787   // Define materials for version 2 of the Time Projection Chamber
1788   //
1789
1790   AliTPC::CreateMaterials();
1791 }
1792
1793 //_____________________________________________________________________________
1794 void AliTPCv2::Init()
1795 {
1796   //
1797   // Initialises version 2 of the TPC after that it has been built
1798   //
1799
1800   Int_t *idtmed = fIdtmed->GetArray();
1801
1802   AliTPC::Init();
1803
1804
1805
1806   fIdSens=gMC->VolId("TPSS");
1807
1808   fIdLSec=gMC->VolId("TPLS"); // lower sector
1809   fIdUSec=gMC->VolId("TPUS"); // upper sector
1810
1811   gMC->SetMaxNStep(30000); // max. number of steps increased
1812
1813   gMC->Gstpar(idtmed[2],"LOSS",5); // specific energy loss
1814
1815   AliInfo("*** TPC version 2 initialized ***");
1816   AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
1817
1818   //
1819
1820 }
1821
1822 //_____________________________________________________________________________
1823 void AliTPCv2::StepManager()
1824 {
1825   //
1826   // Called for every step in the Time Projection Chamber
1827   //
1828
1829   //
1830   // parameters used for the energy loss calculations
1831   //
1832   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1833   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1834   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1835
1836
1837   const Float_t kbig = 1.e10;
1838
1839   Int_t id,copy;
1840   Float_t hits[5];
1841   Int_t vol[2];
1842   TLorentzVector p;
1843
1844   vol[1]=0; // preset row number to 0
1845
1846   //
1847
1848   gMC->SetMaxStep(kbig);
1849
1850   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1851
1852   Float_t charge = gMC->TrackCharge();
1853
1854   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1855
1856   // check the sensitive volume
1857
1858   id = gMC->CurrentVolID(copy); // current volume Id
1859
1860   if ( (gMC->IsTrackEntering() || gMC->IsTrackExiting()) &&
1861        ((id == fIdLSec) || (id == fIdUSec)) ) {
1862
1863     AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
1864   }
1865
1866   if(id == fIdLSec){
1867     vol[0] = copy-1; // lower sector number
1868   }
1869   else if(id == fIdUSec){
1870     vol[0] = copy+fTPCParam->GetNInnerSector()-1; // upper sector number
1871   }
1872   else if(id == fIdSens && gMC->IsTrackEntering()){
1873
1874     // track is entering the sensitive strip
1875
1876     vol[1]= copy-1; // row number (absolute)
1877
1878     // sector type
1879
1880     id = gMC->CurrentVolOffID(1,copy);
1881
1882     if(id == fIdLSec){
1883
1884       // lower sector
1885
1886       vol[0] = copy-1; // sector number
1887
1888     }
1889     else {
1890
1891       // upper sector
1892
1893       vol[0] = copy-1+fTPCParam->GetNInnerSector(); // sector number
1894       vol[1] -= fTPCParam->GetNRowLow(); // row number (starts also from 0)
1895
1896     }
1897
1898     if(vol[1] == 0){
1899
1900       // because Jouri wants to have this
1901
1902       gMC->TrackMomentum(p);
1903       hits[0]=p[0];
1904       hits[1]=p[1];
1905       hits[2]=p[2];
1906       hits[3]=0.; // this hit has no energy loss
1907       // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->GetCurrentTrackNumber(),vol,hits);
1908
1909       // Get also the track time for pileup simulation
1910       hits[4]=gMC->TrackTime();
1911
1912       AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  //MI change
1913
1914     }
1915
1916      gMC->TrackPosition(p);
1917      hits[0]=p[0];
1918      hits[1]=p[1];
1919      hits[2]=p[2];
1920      hits[3]=0.; // this hit has no energy loss
1921      // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->GetCurrentTrackNumber(),vol,hits);
1922
1923      // Get also the track time for pileup simulation
1924      hits[4]=gMC->TrackTime();
1925
1926      AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  //MI change
1927
1928   }
1929   else return;
1930
1931   //-----------------------------------------------------------------
1932   //  charged particle is in the sensitive volume
1933   //-----------------------------------------------------------------
1934
1935   if(gMC->TrackStep() > 0) {
1936
1937     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1938     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1939
1940     gMC->TrackPosition(p);
1941     hits[0]=p[0];
1942     hits[1]=p[1];
1943     hits[2]=p[2];
1944     hits[3]=(Float_t)nel;
1945
1946     // Add this hit
1947
1948     // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->GetCurrentTrackNumber(),vol,hits);
1949     if (fHitType&&2){
1950       gMC->TrackMomentum(p);
1951       Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1952       Float_t precision =   (momentum>0.1) ? 0.002 :0.01;
1953       fTrackHits->SetHitPrecision(precision);
1954     }
1955
1956     // Get also the track time for pileup simulation
1957     hits[4]=gMC->TrackTime();
1958
1959     AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  //MI change
1960
1961   }
1962
1963   // Stemax calculation for the next step
1964
1965   Float_t pp;
1966   TLorentzVector mom;
1967   gMC->TrackMomentum(mom);
1968   Float_t ptot=mom.Rho();
1969   Float_t betaGamma = ptot/gMC->TrackMass();
1970
1971   Int_t pid=gMC->TrackPid();
1972   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1973     {
1974       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1975     }
1976   else
1977     {
1978
1979       betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
1980       pp=kprim*BetheBloch(betaGamma);
1981
1982       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1983     }
1984
1985   Double_t rnd = gMC->GetRandom()->Rndm();
1986
1987   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1988
1989 }
1990
1991 //_____________________________________________________________________________
1992 Float_t AliTPCv2::BetheBloch(Float_t bg)
1993 {
1994   //
1995   // Bethe-Bloch energy loss formula
1996   //
1997   const Double_t kp1=0.76176e-1;
1998   const Double_t kp2=10.632;
1999   const Double_t kp3=0.13279e-4;
2000   const Double_t kp4=1.8631;
2001   const Double_t kp5=1.9479;
2002
2003   Double_t dbg = (Double_t) bg;
2004
2005   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
2006
2007   Double_t aa = TMath::Power(beta,kp4);
2008   Double_t bb = TMath::Power(1./dbg,kp5);
2009
2010   bb=TMath::Log(kp3+bb);
2011
2012   return ((Float_t)((kp2-aa-bb)*kp1/aa));
2013 }
2014
2015