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