TPC/AliTPCv3.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /* $Id$ */
  17
  18 //
  19 ///////////////////////////////////////////////////////////////////////////////
  20 //                                                                           //
  21 //  Time Projection Chamber version 3 -- detailed TPC and slow simulation    //
  22 //
  23 //Begin_Html
  24 /*
  25 <img src="picts/AliTPCv3Class.gif">
  26 */
  27 //End_Html
  28 //                                                                           //
  29 //                                                                           //
  30 ///////////////////////////////////////////////////////////////////////////////
  31
  32 #include <stdlib.h>
  33
  34 #include <TInterpreter.h>
  35 #include <TLorentzVector.h>
  36 #include <TMath.h>
  37 #include <TVirtualMC.h>
  38 #include <TPDGCode.h>
  39
  40 #include "AliConst.h"
  41 #include "AliRun.h"
  42 #include "AliTPCDigitsArray.h"
  43 #include "AliTPCParam.h"
  44 #include "AliTPCParamSR.h"
  45 #include "AliTPCTrackHitsV2.h"
  46 #include "AliTPCv3.h"
  47 #include "AliMC.h"
  48
  49 ClassImp(AliTPCv3)
  50 //_____________________________________________________________________________
  51
  52   AliTPCv3::AliTPCv3(){
  53
  54   fHitType = 1;
  55
  56 }
  57
  58 //_____________________________________________________________________________
  59 AliTPCv3::AliTPCv3(const char *name, const char *title) :
  60   AliTPC(name, title)
  61 {
  62   //
  63   // Standard constructor for Time Projection Chamber version 3
  64   //
  65
  66   SetBufferSize(128000);
  67   fIdSens=0;
  68
  69   SetGasMixt(2,20,10,-1,0.9,0.1,0.);
  70
  71   if (fTPCParam)
  72      fTPCParam->Write(fTPCParam->GetTitle());
  73
  74   fHitType =1;
  75 }
  76
  77 //_____________________________________________________________________________
  78 void AliTPCv3::CreateGeometry()
  79 {
  80   //
  81   // Creation of the TPC coarse geometry (version 3)
  82   // The whole drift volume is sensitive
  83   // Origin Marek Kowalski Cracow
  84   //
  85   //Begin_Html
  86   /*
  87     <img src="picts/AliTPCgif">
  88   */
  89   //End_Html
  90   //Begin_Html
  91   /*
  92     <img src="picts/AliTPCv3Tree.gif">
  93   */
  94   //End_Html
  95   Float_t dm[50];
  96
  97   Int_t *idtmed = fIdtmed->GetArray(); // TPC media
  98
  99   Int_t idrotm[120]; // rotation matrices
 100
 101   Int_t nRotMat = 0; // actual number of rotation matrices
 102
 103
 104   //
 105   //  Mother volume (Air) - all volumes will be positioned in it
 106   //
 107
 108   dm[0]=0.;
 109   dm[1]=360.;
 110   dm[2]=8.;
 111
 112   //
 113
 114   dm[3]=-283.7;
 115   dm[4]=77.017;
 116   dm[5]=278.;
 117
 118   //
 119
 120   dm[6]=-253.6;
 121   dm[7]=65.6;
 122   dm[8]=278.;
 123
 124   //
 125
 126   dm[9]=-73.3;
 127   dm[10]=60.9;
 128   dm[11]=278.;
 129
 130   //
 131
 132   dm[12]=-73.3;
 133   dm[13]=56.9;
 134   dm[14]=278.;
 135
 136   //
 137
 138   dm[15]=73.3;
 139   dm[16]=56.9;
 140   dm[17]=278.;
 141
 142   //
 143
 144   dm[18]=73.3;
 145   dm[19]=60.9;
 146   dm[20]=278.;
 147
 148   //
 149
 150   dm[21]=253.6;
 151   dm[22]=65.6;
 152   dm[23]=278.;
 153
 154   //
 155
 156   dm[24]=283.7;
 157   dm[25]=77.017;
 158   dm[26]=278.;
 159
 160   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,27);
 161
 162   // outer part
 163
 164   //-------------------------------------------------------------------
 165   //   Tpc Outer INsulator (CO2) - contains cont. vessel and field cage
 166   //-------------------------------------------------------------------
 167
 168   dm[0]= 0.;
 169   dm[1]= 360.;
 170   dm[2]= 6.;
 171
 172   //
 173
 174   dm[3]=-253.6;
 175   dm[4]=258.;
 176   dm[5]=275.5;
 177
 178   //
 179
 180   dm[6]=-250.6;
 181   dm[7]=258.;
 182   dm[8]=275.5;
 183
 184   //
 185
 186   dm[9]=-250.6;
 187   dm[10]=258.;
 188   dm[11]=278.;
 189
 190   //
 191
 192   dm[12]=253.6;
 193   dm[13]=258.;
 194   dm[14]=278.;
 195
 196   //
 197
 198   dm[15]=253.6;
 199   dm[16]=264.8;
 200   dm[17]=278.;
 201
 202   //
 203
 204   dm[18]=256.6;
 205   dm[19]=264.8;
 206   dm[20]=278.;
 207
 208   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
 209
 210   //----------------------------------------------------------------
 211   // Tpc Outer Contaiment Vessel
 212   //  mother volume - Al, daughters - composite (sandwich)
 213   //----------------------------------------------------------------
 214
 215   dm[0]=0.;
 216   dm[1]=360.;
 217   dm[2]=6.;
 218
 219   //
 220
 221   dm[3]=-250.6;
 222   dm[4]=270.4;
 223   dm[5]=278.;
 224
 225   //
 226
 227   dm[6]=-247.6;
 228   dm[7]=270.4;
 229   dm[8]=278.;
 230
 231   //
 232
 233   dm[9]=-247.6;
 234   dm[10]=274.8124;
 235   dm[11]=278.;
 236
 237   //
 238
 239   dm[12]=253.6;
 240   dm[13]=274.8124;
 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("TOCV","PCON",idtmed[4],dm,21);
 256
 257   // Daughter volumes - sandwich
 258
 259   // Tpc SAndwich 1 - Al
 260
 261   dm[0]=274.8124;
 262   dm[1]=278.;
 263   dm[2]=252.1;
 264
 265   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
 266
 267   // Tpc SAndwich 2 - epoxy glue (I use Lexan)
 268
 269   dm[0] += 5.e-3;
 270   dm[1] -= 5.e-3;
 271
 272   gMC->Gsvolu("TSA2","TUBE",idtmed[14],dm,3);
 273
 274   // Tpc SAndwich 3 - Tedlar
 275
 276   dm[0] += 0.01;
 277   dm[1] -= 0.01;
 278
 279   gMC->Gsvolu("TSA3","TUBE",idtmed[9],dm,3);
 280
 281
 282   // Tpc SAndwich 4 - fiber glass (G10)
 283
 284   dm[0] += 3.8e-3;
 285   dm[1] -= 3.8e-3;
 286
 287   gMC->Gsvolu("TSA4","TUBE",idtmed[12],dm,3);
 288
 289   // Tpc SAndwich 5 - NOMEX honeycomb
 290
 291   dm[0] += 0.075;
 292   dm[1] -= 0.075;
 293
 294   gMC->Gsvolu("TSA5","TUBE",idtmed[6],dm,3);
 295
 296   // 5->4->3->2->1->TCOV
 297
 298
 299   gMC->Gspos("TSA5",1,"TSA4",0.,0.,0.,0,"ONLY");
 300   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
 301   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
 302   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");
 303
 304   gMC->Gspos("TSA1",1,"TOCV",0.,0.,3.,0,"ONLY");
 305
 306   // TCOV-> TOIN
 307
 308   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
 309
 310   //-------------------------------------------------------
 311   //  Tpc Outer Field Cage
 312   //  mother volume - Al, daughters - composite (sandwich)
 313   //-------------------------------------------------------
 314
 315   dm[0]=0.;
 316   dm[1]=360.;
 317   dm[2]=6.;
 318
 319   //
 320
 321   dm[3]=-253.6;
 322   dm[4]=258.;
 323   dm[5]=275.5;
 324
 325   //
 326
 327   dm[6]=-250.6;
 328   dm[7]=258.;
 329   dm[8]=275.5;
 330
 331   //
 332
 333   dm[9]=-250.6;
 334   dm[10]=258.;
 335   dm[11]=260.0476;
 336
 337   //
 338
 339   dm[12]=250.6;
 340   dm[13]=258.;
 341   dm[14]=260.0476;
 342
 343   //
 344
 345   dm[15]=250.6;
 346   dm[16]=258.;
 347   dm[17]=269.6;
 348
 349   //
 350
 351   dm[18]=253.6;
 352   dm[19]=258.;
 353   dm[20]=269.6;
 354
 355   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
 356
 357   // Daughter volumes
 358
 359   // Tpc SAndwich 6 - Tedlar
 360
 361   dm[0]= 258.;
 362   dm[1]= 260.0476;
 363   dm[2]= 252.1;
 364
 365   gMC->Gsvolu("TSA6","TUBE",idtmed[9],dm,3);
 366
 367   // Tpc SAndwich 7 - fiber glass
 368
 369   dm[0] += 3.8e-3;
 370   dm[1] -= 3.8e-3;
 371
 372   gMC->Gsvolu("TSA7","TUBE",idtmed[12],dm,3);
 373
 374
 375   // Tpc SAndwich 8 - NOMEX
 376
 377   dm[0] += 0.02;
 378   dm[1] -= 0.02;
 379
 380   gMC->Gsvolu("TSA8","TUBE",idtmed[6],dm,3);
 381
 382   // 8->7->6->TOFC
 383
 384   gMC->Gspos("TSA8",1,"TSA7",0.,0.,0.,0,"ONLY");
 385   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY");
 386   gMC->Gspos("TSA6",1,"TOFC",0.,0.,0.,0,"ONLY");
 387
 388   // TOFC->TOIN
 389
 390   gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
 391
 392   // TOIN->TPC
 393
 394   gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 395
 396   // inner part
 397
 398   //--------------------------------------------------------------------
 399   // Tpc Inner INsulator (CO2) - inner f.c. will be placed there
 400   // Inner containment vessel will be placed directly in the TPC
 401   //--------------------------------------------------------------------
 402
 403   dm[0]=0.;
 404   dm[1]=360.;
 405   dm[2]=4.;
 406
 407   //
 408
 409   dm[3]=-253.6;
 410   dm[4]=65.9;
 411   dm[5]=79.2;
 412
 413   //
 414
 415   dm[6]=-73.3;
 416   dm[7]=61.2;
 417   dm[8]=79.2;
 418
 419   //
 420
 421   dm[9]=73.3;
 422   dm[10]=61.2;
 423   dm[11]=79.2;
 424
 425   //
 426
 427   dm[12]=253.6;
 428   dm[13]=65.9;
 429   dm[14]=79.2;
 430
 431   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,15);
 432
 433   // the middle part of the F.C. is thinner - carve out the strip - Ne-CO2
 434
 435   dm[0]=79.16;
 436   dm[1]=79.2;
 437   dm[2]=88.;
 438
 439   gMC->Gsvolu("TII1","TUBE",idtmed[1],dm,3);
 440
 441   gMC->Gspos("TII1",1,"TIIN",0.,0.,0.,0,"ONLY");
 442
 443   //-----------------------------------------------------
 444   // Tpc Inner Field Cage
 445   // mother volume - Al, daughters - composite (sandwich)
 446   //------------------------------------------------------
 447
 448   dm[0]=0.;
 449   dm[1]=360.;
 450   dm[2]=10.;
 451
 452   //
 453
 454   dm[3]=-253.6;
 455   dm[4]=70.3;
 456   dm[5]=79.2;
 457
 458   //
 459
 460   dm[6]=-250.6;
 461   dm[7]=70.3;
 462   dm[8]=79.2;
 463
 464   //
 465
 466   dm[9]=-250.6;
 467   dm[10]=77.0524;
 468   dm[11]=79.2;
 469
 470   //
 471
 472   dm[12]=-88.;
 473   dm[13]=77.0524;
 474   dm[14]=79.2;
 475
 476   //
 477
 478   dm[15]=-88.;
 479   dm[16]=77.0924;
 480   dm[17]=79.16;
 481
 482   //
 483
 484   dm[18]=88.;
 485   dm[19]=77.0924;
 486   dm[20]=79.16;
 487
 488   //
 489
 490   dm[21]=88.;
 491   dm[22]=77.0524;
 492   dm[23]=79.2;
 493
 494   //
 495
 496   dm[24]=250.6;
 497   dm[25]=77.0524;
 498   dm[26]=79.2;
 499
 500   //
 501
 502   dm[27]=250.6;
 503   dm[28]=70.3;
 504   dm[29]=79.2;
 505
 506   //
 507
 508   dm[30]=253.6;
 509   dm[31]=70.3;
 510   dm[32]=79.2;
 511
 512   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,33);
 513
 514   // daughter volumes - central part
 515
 516   // Tpc Sandwich 9 -Tedlar
 517
 518   dm[0]=77.0924;
 519   dm[1]=79.16;
 520   dm[2]=88.;
 521
 522   gMC->Gsvolu("TSA9","TUBE",idtmed[9],dm,3);
 523
 524   // Tpc Sandwich 10 - fiber glass (G10)
 525
 526   dm[0] += 3.8e-3;
 527   dm[1] -= 3.8e-3;
 528
 529   gMC->Gsvolu("TS10","TUBE",idtmed[12],dm,3);
 530
 531   // Tpc Sandwich 11 - NOMEX
 532
 533   dm[0] += 0.03;
 534   dm[1] -= 0.03;
 535
 536   gMC->Gsvolu("TS11","TUBE",idtmed[6],dm,3);
 537
 538   // 11->10->9->TIFC
 539
 540   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
 541   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
 542
 543   gMC->Gspos("TSA9",1,"TIFC",0.,0.,0.,0,"ONLY");
 544
 545   // daughter volumes - outer parts (reinforced)
 546
 547   // Tpc Sandwich 12 -Tedlar
 548
 549   dm[0]=77.0524;
 550   dm[1]=79.2;
 551   dm[2]=82.05;
 552
 553   gMC->Gsvolu("TS12","TUBE",idtmed[9],dm,3);
 554
 555   // Tpc Sandwich 13 - fiber glass (G10)
 556
 557   dm[0] += 3.8e-3;
 558   dm[1] -= 3.8e-3;
 559
 560   gMC->Gsvolu("TS13","TUBE",idtmed[12],dm,3);
 561
 562   // Tpc Sandwich 14 - NOMEX
 563
 564   dm[0] += 0.07;
 565   dm[1] -= 0.07;
 566
 567   gMC->Gsvolu("TS14","TUBE",idtmed[6],dm,3);
 568
 569   // 14->13->12->TIFC
 570
 571   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
 572   gMC->Gspos("TS13",1,"TS12",0.,0.,0.,0,"ONLY");
 573
 574   gMC->Gspos("TS12",1,"TIFC",0.,0.,170.05,0,"ONLY");
 575   gMC->Gspos("TS12",2,"TIFC",0.,0.,-170.05,0,"ONLY");
 576
 577   // place this inside the inner insulator
 578
 579   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
 580
 581   // and now in the TPC...
 582
 583   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
 584
 585   //---------------------------------------------------------
 586   // Tpc Inner Containment vessel - Cones
 587   //---------------------------------------------------------
 588
 589   dm[0]=0.;
 590   dm[1]=360.;
 591   dm[2]=8.;
 592
 593   //
 594
 595   dm[3]=71.8;
 596   dm[4]=56.9;
 597   dm[5]=59.4;
 598
 599   //
 600
 601   dm[6]=73.;
 602   dm[7]=56.9;
 603   dm[8]=59.4;
 604
 605   //
 606
 607   dm[9]=73.;
 608   dm[10]=56.9;
 609   dm[11]=61.2;
 610
 611   //
 612
 613   dm[12]=73.3;
 614   dm[13]=56.9;
 615   dm[14]=61.2;
 616
 617   //
 618
 619   dm[15]=73.3;
 620   dm[16]=60.9;
 621   dm[17]=61.2;
 622
 623   //
 624
 625   dm[18]=253.6;
 626   dm[19]=65.6;
 627   dm[20]=65.9;
 628
 629   //
 630
 631   dm[21]=253.6;
 632   dm[22]=65.6;
 633   dm[23]=74.6;
 634
 635   //
 636
 637   dm[24]=256.6;
 638   dm[25]=65.6;
 639   dm[26]=74.6;
 640
 641   gMC->Gsvolu("TICC","PCON",idtmed[4],dm,27);
 642
 643   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
 644
 645   // reflection matrix
 646
 647   theta1 = 90.;
 648   phi1   = 0.;
 649   theta2 = 90.;
 650   phi2   = 270.;
 651   theta3 = 180.;
 652   phi3   = 0.;
 653
 654   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 655
 656   gMC->Gspos("TICC",1,"TPC ",0.,0.,0.,0,"ONLY");
 657   gMC->Gspos("TICC",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 658
 659
 660   //---------------------------------------------------------
 661   // Tpc Inner Containment vessel - Middle part -Al
 662   //---------------------------------------------------------
 663
 664   dm[0]=0.;
 665   dm[1]=360.;
 666   dm[2]=6.;
 667
 668   //
 669
 670   dm[3]=-71.6;
 671   dm[4]=60.2;
 672   dm[5]=61.2;
 673
 674   //
 675
 676   dm[6]=-69.1;
 677   dm[7]=60.2;
 678   dm[8]=61.2;
 679
 680   //
 681
 682   dm[9]=-69.1;
 683   dm[10]=60.6224;
 684   dm[11]=61.2;
 685
 686   //
 687
 688   dm[12]=69.1;
 689   dm[13]=60.6224;
 690   dm[14]=61.2;
 691
 692   //
 693
 694   dm[15]=69.1;
 695   dm[16]=60.2;
 696   dm[17]=61.2;
 697
 698   //
 699
 700   dm[18]=71.6;
 701   dm[19]=60.2;
 702   dm[20]=61.2;
 703
 704   gMC->Gsvolu("TICM","PCON",idtmed[4],dm,21);
 705
 706   // Tpc Sandwich 15 - Al
 707
 708   dm[0]=60.6224;
 709   dm[1]=61.2;
 710   dm[2]=70.1;
 711
 712   gMC->Gsvolu("TS15","TUBE",idtmed[4],dm,3);
 713
 714   // Tpc Sandwich 16 -  epoxy glue
 715
 716   dm[0] += 5.e-3;
 717   dm[1] -= 5.e-3;
 718
 719   gMC->Gsvolu("TS16","TUBE",idtmed[14],dm,3);
 720
 721   // Tpc Sandwich 17 - Tedlar
 722
 723   dm[0] += 0.01;
 724   dm[1] -= 0.01;
 725
 726   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
 727
 728   // Tpc Sandwich 18 - carbon fiber
 729
 730   dm[0] += 3.8e-3;
 731   dm[1] -= 3.8e-3;
 732
 733   gMC->Gsvolu("TS18","TUBE",idtmed[15],dm,3);
 734
 735   // Tpc Sandwich 19 - Nomex
 736
 737   dm[0] += 0.02;
 738   dm[1] -= 0.02;
 739
 740   gMC->Gsvolu("TS19","TUBE",idtmed[6],dm,3);
 741
 742   // 19->18->17->16->15-> TICM
 743
 744   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY");
 745   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
 746   gMC->Gspos("TS17",1,"TS16",0.,0.,0.,0,"ONLY");
 747   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
 748
 749   gMC->Gspos("TS15",1,"TICM ",0.,0.,0.,0,"ONLY");
 750
 751
 752   // TPc inner cont. vessel Joints
 753
 754   dm[0]=60.2;
 755   dm[1]=61.2;
 756   dm[2]=0.5;
 757
 758   gMC->Gsvolu("TPJ1","TUBE",idtmed[4],dm,3);
 759
 760   gMC->Gspos("TPJ1",1,"TPC ",0.,0.,72.3,0,"ONLY");
 761   gMC->Gspos("TPJ1",2,"TPC ",0.,0.,-72.3,0,"ONLY");
 762
 763   //
 764
 765   dm[0]=0.;
 766   dm[1]=360.;
 767   dm[2]=4.;
 768
 769   //
 770
 771   dm[3]=70.8;
 772   dm[4]=58.4;
 773   dm[5]=60.1;
 774
 775   //
 776
 777   dm[6]=71.2;
 778   dm[7]=58.4;
 779   dm[8]=60.1;
 780
 781   //
 782
 783   dm[9]=71.2;
 784   dm[10]=58.4;
 785   dm[11]=59.4;
 786
 787   //
 788
 789   dm[12]=71.6;
 790   dm[13]=58.4;
 791   dm[14]=59.4;
 792
 793   gMC->Gsvolu("TPJ2","PCON",idtmed[4],dm,15);
 794
 795   gMC->Gspos("TPJ2",1,"TPC ",0.,0.,0.,0,"ONLY");
 796   gMC->Gspos("TPJ2",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
 797
 798
 799
 800   // Tpc Inner Containment vessel Seal (Viton, I use Lexan for a time being)
 801
 802   dm[0]=58.4;
 803   dm[1]=61.2;
 804   dm[2]=0.1;
 805
 806   gMC->Gsvolu("TICS","TUBE",idtmed[14],dm,3);
 807
 808   gMC->Gspos("TICS",1,"TPC ",0.,0.,71.7,0,"ONLY");
 809   gMC->Gspos("TICS",2,"TPC ",0.,0.,-71.7,0,"ONLY");
 810
 811   // TICM -> TPC
 812
 813   gMC->Gspos("TICM",1,"TPC ",0.,0.,0.,0,"ONLY");
 814
 815   //
 816
 817   nRotMat++; // prepare for the next rotation matrix
 818
 819   //---------------------------------------------------------
 820   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
 821   //  and its daughters (HV membrane, rods, readout chambers)
 822   //---------------------------------------------------------
 823
 824   dm[0]= 79.2;
 825   dm[1]= 258.0;
 826   dm[2]= 253.6;
 827
 828   gMC->Gsvolu("TDGS","TUBE",idtmed[2],dm,3);
 829
 830   // sector opening angles
 831
 832   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
 833
 834   // sector angle shift
 835
 836   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
 837
 838   // number of sectors
 839
 840   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
 841   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
 842
 843   // All above parameters are identical for inner and outer
 844   // sectors. The distinction is kept for the historical reasons
 845   // and eventually will disappear.
 846
 847   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
 848   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
 849   Float_t space;
 850
 851   //-------------------------------------------------------------------------
 852   //   Tpc Inner Readout Chambers
 853   //-------------------------------------------------------------------------
 854
 855   dm[0]= 14.483;
 856   dm[1]= 23.3345;
 857   dm[2]= 1.6; // thickness
 858   dm[3]= 25.1;
 859
 860   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
 861
 862   // this volume will be positioned in the empty space
 863   // of the end-cap to avoid overlaps
 864
 865   dm[0]= 13.7305;
 866   dm[1]= 21.1895;
 867   dm[2]= 2.25;
 868   dm[3]= 21.15;
 869
 870   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
 871
 872
 873   //------------------------------------------------
 874   // Tpc Inner readout chamber Pad Plane
 875   //------------------------------------------------
 876
 877   dm[0]= 14.483;
 878   dm[1]= 23.3345;
 879   dm[2]= 0.5;
 880   dm[3]= 25.1;
 881
 882   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
 883
 884   //
 885
 886   dm[0] -= 1.218511934;
 887   dm[1] -= 1.218511934;
 888   dm[2] = 0.35;
 889
 890   gMC->Gsvolu("TIC3","TRD1",idtmed[1],dm,4);
 891
 892   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
 893
 894   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
 895
 896
 897   //----------------------------------------------
 898   // Tpc Readout Chambers Empty spaces - for both
 899   // inner and outer sectors
 900   //----------------------------------------------
 901
 902   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
 903
 904   // Inner sector - 4 spaces
 905
 906
 907   dm[3] = 4.7625;
 908   dm[0] = 12.472;
 909
 910   Float_t rr = 90.52;
 911   Float_t zz;
 912
 913   zz= -12.7875;
 914
 915   space = rr*tanAlpha-dm[0];
 916
 917   for(Int_t nsLow=0;nsLow<4;nsLow++){
 918
 919     rr += 9.525;
 920     dm[1]= rr*tanAlpha - space;
 921
 922     dm[2]=0.8;
 923
 924     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
 925
 926     //
 927
 928     dm[2] = 1.2;
 929
 930     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
 931
 932     rr += 0.4;
 933     dm[0] = rr*tanAlpha - space;
 934     zz += (0.4+9.525);
 935
 936   }
 937
 938   dm[0]= 12.472;
 939   // dm[1] - this is the dm[1] from the previous TRCE
 940   dm[2]= 1.05;
 941   dm[3]= 19.65;
 942
 943   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.2,0.,0,"ONLY",dm,4);
 944
 945   //
 946   // TPc Space for Connectors
 947   //
 948
 949   dm[0]= .3;
 950   dm[1]= .3;
 951   dm[2]= 4.5;
 952
 953   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
 954
 955   // TPC Connectors
 956
 957   dm[0]= .25;
 958   dm[1]= .15;
 959   dm[2]= 3.75;
 960
 961   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3);
 962
 963   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
 964
 965   zz = -12.7875;
 966
 967
 968   Float_t alpha;
 969   Float_t astep;
 970
 971   // inner part of the inner sector - 2 x 20 holes
 972
 973   astep = 20.00096874/19.;
 974
 975   alpha = 10.00048437-astep;
 976
 977   Float_t x1,x2;
 978
 979     x1 = 13.31175725;
 980     x1 -= 0.996357832;
 981
 982     x2 = 15.06180253;
 983     x2 -= 1.163028812;
 984
 985   Int_t ncon;
 986
 987   for(ncon=0;ncon<20;ncon++){
 988
 989     phi1 = 0.;
 990     theta1 = 90.+alpha;
 991     phi2=90.;
 992     theta2 = 90.;
 993     phi3 = (alpha>0) ? 0. : 180.;
 994     theta3 = TMath::Abs(alpha);
 995
 996     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 997
 998
 999
1000     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1001     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1002
1003
1004     x1 -= 1.296357833;
1005     x2 -= 1.463028812;
1006
1007     alpha -= astep;
1008     nRotMat++;
1009
1010   }
1011
1012   // outer part of the inner sector - 2 x 25 holes
1013
1014    astep = 20.00096874/24.;
1015    alpha = 10.00048437-astep;
1016
1017    x1 = 16.81184781;
1018    x1 -= 1.016295986;
1019
1020    x2 = 18.5618931;
1021    x2 -= 1.150914854;
1022
1023   for(ncon=0;ncon<25;ncon++){
1024
1025     phi1 = 0.;
1026     theta1 = 90.+alpha;
1027     phi2=90.;
1028     theta2 = 90.;
1029     phi3 = (alpha>0) ? 0. : 180.;
1030     theta3 = TMath::Abs(alpha);
1031
1032     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1033
1034
1035
1036     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1037     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1038
1039
1040     x1 -= 1.316295986;
1041     x2 -= 1.450914854;
1042
1043     alpha -= astep;
1044     nRotMat++;
1045
1046   }
1047
1048   //--------------------------------------------------------------------------
1049   //  TPC Outer Readout Chambers
1050   //  this is NOT a final design
1051   //--------------------------------------------------------------------------
1052
1053   dm[0]= 23.3875;
1054   dm[1]= 43.524;
1055   dm[2]= 1.5; //thickness
1056   dm[3]= 57.1;
1057
1058   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1059
1060   //------------------------------------------------
1061   // Tpc Outer readout chamber Pad Plane
1062   //------------------------------------------------
1063
1064   dm[2]= 0.5;
1065
1066   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1067
1068   dm[0] -= 1.218511934;
1069   dm[1] -= 1.218511934;
1070   dm[2] = 0.35;
1071
1072   gMC->Gsvolu("TOC3","TRD1",idtmed[1],dm,4);
1073
1074   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1075
1076   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1077
1078   // empty space
1079
1080   dm[0]= 21.035;
1081   dm[1]= 38.7205;
1082   dm[2]= 0.7;
1083   dm[3]= 50.15;
1084
1085   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);
1086
1087   dm[0]= 22.2935;
1088   dm[1]= 40.5085;
1089   dm[2]= 2.25;
1090   dm[3]= 51.65;
1091
1092   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1093
1094   dm[0]= 21.35;
1095   dm[1]= 38.7205;
1096   dm[2]= 2.25;
1097   dm[3]= 50.15;
1098
1099   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1100
1101   //-----------------------------------------------
1102   // Tpc Services Support Wheel
1103   //-----------------------------------------------
1104
1105   dm[0]=0.;
1106   dm[1]=360.;
1107   dm[2]=18.;
1108   dm[3]=2.;
1109
1110   dm[4]= -5.;
1111   dm[5]= 77.017;
1112   dm[6]= 255.267;
1113
1114   dm[7]= 5.;
1115   dm[8]= dm[5];
1116   dm[9]= dm[6];
1117
1118   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1119
1120   // Tpc Services Wheel Cover
1121
1122   dm[4]= -0.5;
1123   dm[7]= 0.5;
1124
1125   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1126
1127   // Tpc Service wheel Cover Empty space
1128
1129   dm[0]= 10.99;
1130   dm[1]= 39.599;
1131   dm[2]= .5;
1132   dm[3]= 81.125;
1133
1134   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1135
1136   // Tpc services Wheel Empty Spaces
1137
1138   dm[0]= 13.18017507;
1139   dm[1]= 44.61045938;
1140   dm[2]= 4.;
1141   dm[3]= 89.125;
1142
1143   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1144
1145   // Tpc Services Wheel Bars
1146
1147   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1148
1149   // bars-> TWES
1150
1151   dm[2]= 4.;
1152   dm[3]= .4;
1153
1154   dm[0]= 13.8149522;
1155   dm[1]= 13.95601379;
1156
1157   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1158
1159   dm[0]= 43.83462067;
1160   dm[1]= 43.97568225;
1161
1162   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1163
1164   // TPc ELectronics - right now 30% X0 Si
1165
1166   dm[0]= 14.03813696;
1167   dm[1]= 43.3524075;
1168   dm[2]= 1.404;
1169   dm[3]= 83.125;
1170
1171   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1172   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1173
1174   //--------------------------------------------------------------------------
1175   //  End caps
1176   //--------------------------------------------------------------------------
1177
1178   // TPc Main Wheel - Al
1179
1180   dm[0]= 74.9;
1181   dm[1]= 264.4;
1182   dm[2]= 3.0;
1183
1184   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1185
1186   //--------------------------------------------------------------------------
1187   //  Tpc Empty Space for the Readout chambers
1188   //--------------------------------------------------------------------------
1189
1190   Float_t rLow= 86.2;
1191   Float_t rUp= 243.5;
1192   Float_t dR = 0.5*(rUp-rLow);
1193
1194   space= 1.5/cosAlpha; // wheel ribs are 3.0 cm wide
1195
1196   dm[0]= rLow*tanAlpha-space;
1197   dm[1]= rUp*tanAlpha-space;
1198   dm[2] = 3.0;
1199   dm[3]= dR;
1200
1201   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1202
1203   // TIC1->TESR
1204
1205   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1206
1207   // TOC1->TESR
1208
1209   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1210
1211   // Tpc Empty Space Bars - Al (daughters of TESR)
1212
1213   Float_t zBar;
1214
1215   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1216
1217   // lower bar
1218
1219   dm[0]= rLow*tanAlpha-space;
1220   dm[1]= 88.7*tanAlpha-space;
1221   dm[2]= 2.25;
1222   dm[3]= 1.275;
1223
1224   zBar = -dR+dm[3];
1225
1226   gMC->Gsposp("TESB",1,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1227
1228   // middle bar
1229
1230   dm[0]= 131.65*tanAlpha-space;
1231   dm[1]= 136.5*tanAlpha-space;
1232   dm[3]= 2.425;
1233
1234   zBar = -dR +131.65+dm[3]-rLow;
1235
1236   gMC->Gsposp("TESB",2,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1237
1238   // upper bar
1239
1240   dm[0]= 240.4*tanAlpha-space;
1241   dm[1]= rUp*tanAlpha-space;
1242   dm[3]= 1.55;
1243
1244   zBar = dR-dm[3];
1245
1246   gMC->Gsposp("TESB",3,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1247
1248   //  positioning of the empty spaces into the main wheel
1249
1250   Float_t rCenter,xc,yc;
1251   Float_t rInner,rOuter; // center of the inner and outer chamber
1252
1253   rCenter = rLow+dR;
1254
1255   rInner = 108.07;
1256   rOuter = 190.68;
1257
1258
1259   for(Int_t ns=0; ns<nInnerSector;ns++){
1260
1261     phi1 = ns * innerOpenAngle + innerAngleShift;
1262     phi1 *= kRaddeg; // in degrees
1263
1264     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1265
1266     if (phi1 > 360.) phi1 -= 360.;
1267
1268     theta1 = 90.;
1269     phi2   = 90.;
1270     theta2 = 180.;
1271     phi3   = ns * innerOpenAngle + innerAngleShift;
1272     phi3 *= kRaddeg; // in degrees
1273
1274     phi3 = (Float_t)TMath::Nint(phi3);
1275
1276     if(phi3 > 360.) phi3 -= 360.;
1277
1278     theta3 = 90.;
1279
1280     // "holes"->End plate
1281
1282     xc = rCenter*TMath::Cos(phi3*kDegrad);
1283     yc = rCenter*TMath::Sin(phi3*kDegrad);
1284
1285     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1286
1287     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1288
1289     // TSCE->TSWC (services wheel volumes)
1290
1291     xc = 166.142*TMath::Cos(phi3*kDegrad);
1292     yc = 166.142*TMath::Sin(phi3*kDegrad);
1293
1294     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1295     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1296
1297
1298     // readout chambers->TDGS (drift gas)
1299
1300     xc = rInner*TMath::Cos(phi3*kDegrad);
1301     yc = rInner*TMath::Sin(phi3*kDegrad);
1302
1303     gMC->Gspos("TIRC",ns+1,"TDGS",xc,yc,252.,idrotm[nRotMat],"ONLY");
1304
1305     xc = rOuter*TMath::Cos(phi3*kDegrad);
1306     yc = rOuter*TMath::Sin(phi3*kDegrad);
1307
1308     gMC->Gspos("TORC",ns+1,"TDGS",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1309
1310     nRotMat++;
1311
1312     theta2 = 0.; // reflection
1313
1314     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1315
1316     xc = rInner*TMath::Cos(phi3*kDegrad);
1317     yc = rInner*TMath::Sin(phi3*kDegrad);
1318
1319     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGS",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1320
1321     xc = rOuter*TMath::Cos(phi3*kDegrad);
1322     yc = rOuter*TMath::Sin(phi3*kDegrad);
1323
1324     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGS",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1325
1326     nRotMat++;
1327
1328   }
1329   // TPMW->TPC
1330
1331   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1332   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[0],"ONLY");
1333
1334   //---------------------------------------------------------
1335   //  Tpc High Voltage Membrane - 100 microns of mylar
1336   //---------------------------------------------------------
1337
1338   dm[0]=82.8;
1339   dm[1]=252.;
1340   dm[2]=0.005;
1341
1342   gMC->Gsvolu("THVM","TUBE",idtmed[8],dm,3);
1343
1344   gMC->Gspos("THVM",1,"TDGS",0.,0.,0.,0,"ONLY");
1345
1346   // Tpc High Voltage membrane Holders
1347
1348   gMC->Gsvolu("THVH","TUBE",idtmed[4],dm,0);
1349
1350
1351
1352   // inner
1353
1354   dm[0]=79.3;
1355   dm[1]=82.8;
1356   dm[2]=0.2;
1357
1358   gMC->Gsposp("THVH",1,"TDGS",0.,0.,0.,0,"ONLY",dm,3);
1359
1360   // outer
1361
1362   dm[0]= 252.;
1363   dm[1]= 257.9;
1364   dm[2]= 0.4;
1365
1366   gMC->Gsposp("THVH",2,"TDGS",0.,0.,0.,0,"ONLY",dm,3);
1367
1368   //----------------------------------------------------------
1369   // TPc Support Rods - MAKROLON
1370   //----------------------------------------------------------
1371
1372   dm[0]= 0.9;
1373   dm[1]= 1.2;
1374
1375   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,0); // inner and outer rods differ
1376
1377
1378   for(Int_t nrod=0;nrod<18;nrod++){
1379     Float_t angle=innerOpenAngle*(Float_t)nrod;
1380
1381     xc=81.5*TMath::Cos(angle);
1382     yc=81.5*TMath::Sin(angle);
1383
1384     dm[2]=126.7;
1385
1386     gMC->Gsposp("TPSR",nrod+1,"TDGS",xc,yc,126.9,0,"ONLY",dm,3);
1387     gMC->Gsposp("TPSR",nrod+19,"TDGS",xc,yc,-126.9,0,"ONLY",dm,3);
1388
1389     dm[2]=126.6;
1390
1391     xc=254.25*TMath::Cos(angle);
1392     yc=254.25*TMath::Sin(angle);
1393
1394     // rod number 54 contans the HV cable
1395
1396     if(nrod<17) {
1397       gMC->Gsposp("TPSR",nrod+37,"TDGS",xc,yc,127.,0,"ONLY",dm,3);
1398       gMC->Gsposp("TPSR",nrod+54,"TDGS",xc,yc,-127.,0,"ONLY",dm,3);
1399     }
1400
1401   }
1402
1403   //----------------------------------------------------------
1404   // Tpc High Voltage Rod - MAKROLON + Copper cable
1405   //----------------------------------------------------------
1406
1407   // rod with cable (Left)
1408
1409   dm[0]=0.;
1410   dm[1]=2.25;
1411   dm[2]=126.6;
1412
1413   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1414
1415   // HV cable
1416
1417   dm[0]=0.;
1418   dm[1]=0.3;
1419   dm[2]=126.6;
1420
1421   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);
1422
1423   // empty space
1424
1425   dm[0]=0.3;
1426   dm[1]=1.;
1427   dm[2]=126.6;
1428
1429   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1430
1431   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1432   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1433
1434   // rod without cable
1435
1436   dm[0]=1.8;
1437   dm[1]=2.25;
1438   dm[2]=126.6;
1439
1440   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1441
1442   gMC->Gspos("THVL",1,"TDGS",xc,yc,-127.,0,"ONLY");
1443   gMC->Gspos("THVR",1,"TDGS",xc,yc,127.,0,"ONLY");
1444
1445   gMC->Gspos("TDGS",1,"TPC ",0.,0.,0.,0,"ONLY");
1446
1447   // services wheel cover -> wheel
1448
1449
1450   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1451   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1452
1453
1454   // put the wheel into the TPC
1455
1456   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1457   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1458
1459   //
1460
1461   gMC->Gsord("TPMW",6);
1462   gMC->Gsord("TSSW",6);
1463   gMC->Gsord("TSWC",6);
1464
1465   // put the TPC into ALIC (main mother volume)
1466
1467   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1468
1469
1470 } // end of function
1471
1472 //_____________________________________________________________________________
1473 void AliTPCv3::DrawDetector()
1474 {
1475   //
1476   // Draw a shaded view of the Time Projection Chamber version 3
1477   //
1478
1479
1480   // Set everything unseen
1481   gMC->Gsatt("*", "seen", -1);
1482   //
1483   // Set ALIC mother transparent
1484   gMC->Gsatt("ALIC","SEEN",0);
1485   //
1486   // Set the volumes visible
1487   //
1488
1489   gMC->Gsatt("TPC ","SEEN",0);
1490   gMC->Gsatt("TOIN","SEEN",1);
1491   gMC->Gsatt("TOIN","COLO",7);
1492   gMC->Gsatt("TOCV","SEEN",1);
1493   gMC->Gsatt("TOCV","COLO",4);
1494   gMC->Gsatt("TSA1","SEEN",0);
1495   gMC->Gsatt("TSA2","SEEN",0);
1496   gMC->Gsatt("TSA3","SEEN",0);
1497   gMC->Gsatt("TSA4","SEEN",0);
1498   gMC->Gsatt("TSA5","SEEN",0);
1499   gMC->Gsatt("TOFC","SEEN",1);
1500   gMC->Gsatt("TOFC","COLO",4);
1501   gMC->Gsatt("TSA6","SEEN",0);
1502   gMC->Gsatt("TSA7","SEEN",0);
1503   gMC->Gsatt("TSA8","SEEN",0);
1504   gMC->Gsatt("TIIN","SEEN",1);
1505   gMC->Gsatt("TIIN","COLO",7);
1506   gMC->Gsatt("TII1","SEEN",0);
1507   gMC->Gsatt("TIFC","SEEN",1);
1508   gMC->Gsatt("TIFC","COLO",4);
1509   gMC->Gsatt("TSA9","SEEN",0);
1510   gMC->Gsatt("TS10","SEEN",0);
1511   gMC->Gsatt("TS11","SEEN",0);
1512   gMC->Gsatt("TS12","SEEN",0);
1513   gMC->Gsatt("TS13","SEEN",0);
1514   gMC->Gsatt("TS14","SEEN",0);
1515   gMC->Gsatt("TICC","SEEN",0);
1516   gMC->Gsatt("TICM","SEEN",0);
1517   gMC->Gsatt("TS15","SEEN",0);
1518   gMC->Gsatt("TS16","SEEN",0);
1519   gMC->Gsatt("TS17","SEEN",0);
1520   gMC->Gsatt("TS18","SEEN",0);
1521   gMC->Gsatt("TS19","SEEN",0);
1522   gMC->Gsatt("TPJ1","SEEN",0);
1523   gMC->Gsatt("TPJ2","SEEN",0);
1524   gMC->Gsatt("TICS","SEEN",0);
1525   gMC->Gsatt("TDGS","SEEN",0);
1526   gMC->Gsatt("TIRC","SEEN",0);
1527   gMC->Gsatt("TIC1","SEEN",1);
1528   gMC->Gsatt("TIPP","SEEN",0);
1529   gMC->Gsatt("TIC3","SEEN",0);
1530   gMC->Gsatt("TRCE","SEEN",0);
1531   gMC->Gsatt("TPSC","SEEN",0);
1532   gMC->Gsatt("TPCC","SEEN",0);
1533   gMC->Gsatt("TORC","SEEN",0);
1534   gMC->Gsatt("TOPP","SEEN",0);
1535   gMC->Gsatt("TOC3","SEEN",0);
1536   gMC->Gsatt("TOC1","SEEN",1);
1537   gMC->Gsatt("TSSW","SEEN",1);
1538   gMC->Gsatt("TSWC","SEEN",1);
1539   gMC->Gsatt("TSSW","COLO",3);
1540   gMC->Gsatt("TSWC","COLO",3);
1541   gMC->Gsatt("TSCE","COLO",6);
1542   gMC->Gsatt("TSCE","SEEN",1);
1543   gMC->Gsatt("TWES","SEEN",0);
1544   gMC->Gsatt("TSWB","SEEN",0);
1545   gMC->Gsatt("TPEL","SEEN",0);
1546   gMC->Gsatt("TPMW","SEEN",1);
1547   gMC->Gsatt("TESR","SEEN",1);
1548   gMC->Gsatt("TPMW","COLO",12);
1549   gMC->Gsatt("TIC1","COLO",5);
1550   gMC->Gsatt("TOC1","COLO",5);
1551   gMC->Gsatt("TESB","SEEN",0);
1552   gMC->Gsatt("THVM","SEEN",1);
1553   gMC->Gsatt("THVM","COLO",11);
1554   gMC->Gsatt("THVH","SEEN",0);
1555   gMC->Gsatt("TPSR","SEEN",0);
1556   gMC->Gsatt("THVL","SEEN",0);
1557   gMC->Gsatt("THVC","SEEN",0);
1558   gMC->Gsatt("THVE","SEEN",0);
1559   gMC->Gsatt("THVR","SEEN",0);
1560
1561   //
1562   gMC->Gdopt("hide", "on");
1563   gMC->Gdopt("shad", "on");
1564   gMC->Gsatt("*", "fill", 7);
1565   gMC->SetClipBox(".");
1566   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1567   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1568   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1569   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1570   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1571   gMC->DefaultRange();
1572   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1573   gMC->Gdhead(1111, "Time Projection Chamber");
1574   gMC->Gdman(18, 4, "MAN");
1575   gMC->Gdopt("hide","off");
1576 }
1577
1578 //_____________________________________________________________________________
1579 void AliTPCv3::CreateMaterials()
1580 {
1581   //
1582   // Define materials for version 2 of the Time Projection Chamber
1583   //
1584
1585
1586   //
1587   AliTPC::CreateMaterials();
1588 }
1589
1590 //_____________________________________________________________________________
1591 void AliTPCv3::Init()
1592 {
1593   //
1594   // Initialises version 3 of the TPC after that it has been built
1595   //
1596   Int_t *idtmed = fIdtmed->GetArray();
1597
1598   AliTPC::Init();
1599
1600   fIdSens=gMC->VolId("TDGS"); // drift gas as a sensitive volume
1601
1602   gMC->SetMaxNStep(30000); // max. number of steps increased
1603
1604   gMC->Gstpar(idtmed[2],"LOSS",5);
1605
1606   printf("%s: *** TPC version 3 initialized***\n",ClassName());
1607
1608   printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
1609
1610   // printf("*** TPC version 3 initialized ***\n");
1611   // printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
1612
1613   //
1614
1615 }
1616
1617 //_____________________________________________________________________________
1618 void AliTPCv3::StepManager()
1619 {
1620   //
1621   // Called for every step in the Time Projection Chamber
1622   //
1623
1624   //
1625   // parameters used for the energy loss calculations
1626   //
1627   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1628   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1629   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
1630
1631
1632   const Float_t kbig = 1.e10;
1633
1634   Int_t id,copy;
1635   TLorentzVector pos;
1636   Float_t hits[4];
1637   Int_t vol[2];
1638
1639   vol[1]=0;
1640   vol[0]=0;
1641
1642   //
1643
1644   gMC->SetMaxStep(kbig);
1645
1646   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1647
1648   Float_t charge = gMC->TrackCharge();
1649
1650   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1651
1652
1653   id=gMC->CurrentVolID(copy);
1654
1655   // Check the sensitive volume
1656
1657   if (id != fIdSens) return;
1658
1659   //
1660   //  charged particle is in the sensitive volume
1661   //
1662
1663   if(gMC->TrackStep() > 0) {
1664
1665
1666     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1667     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1668
1669     gMC->TrackPosition(pos);
1670     hits[0]=pos[0];
1671     hits[1]=pos[1];
1672     hits[2]=pos[2];
1673
1674     //
1675     // check the selected side of the TPC
1676     //
1677
1678     if(fSide && fSide*hits[2]<=0.) return;
1679
1680     hits[3]=(Float_t)nel;
1681
1682     // Add this hit
1683
1684     AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  //MI change
1685
1686   }
1687
1688   // Stemax calculation for the next step
1689
1690   Float_t pp;
1691   TLorentzVector mom;
1692   gMC->TrackMomentum(mom);
1693   Float_t ptot=mom.Rho();
1694   Float_t betaGamma = ptot/gMC->TrackMass();
1695
1696   Int_t pid=gMC->TrackPid();
1697   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1698     {
1699       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1700     }
1701   else
1702     {
1703       betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3);
1704       pp=kprim*BetheBloch(betaGamma);
1705       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1706     }
1707
1708   Double_t rnd = gMC->GetRandom()->Rndm();
1709
1710   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1711
1712 }
1713
1714 //_____________________________________________________________________________
1715 Float_t AliTPCv3::BetheBloch(Float_t bg)
1716 {
1717   //
1718   // Bethe-Bloch energy loss formula
1719   //
1720   const Double_t kp1=0.76176e-1;
1721   const Double_t kp2=10.632;
1722   const Double_t kp3=0.13279e-4;
1723   const Double_t kp4=1.8631;
1724   const Double_t kp5=1.9479;
1725
1726   Double_t dbg = (Double_t) bg;
1727
1728   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1729
1730   Double_t aa = TMath::Power(beta,kp4);
1731   Double_t bb = TMath::Power(1./dbg,kp5);
1732
1733   bb=TMath::Log(kp3+bb);
1734
1735   return ((Float_t)((kp2-aa-bb)*kp1/aa));
1736 }