TPC/AliTPCv1.cxx

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //                                                                           //
   3 //  Time Projection Chamber version 1 -- detailed TPC and fast simulation    //
   4 //                                                                           //
   5 //Begin_Html
   6 /*
   7 <img src="picts/AliTPCv1Class.gif">
   8 */
   9 //End_Html
  10 //                                                                           //
  11 //                                                                           //
  12 ///////////////////////////////////////////////////////////////////////////////
  13
  14 #include <TMath.h>
  15 #include <TGeometry.h>
  16 #include <TNode.h>
  17 #include <TBRIK.h>
  18 #include <TTUBE.h>
  19 #include "AliTPCv1.h"
  20 #include "AliRun.h"
  21 #include <iostream.h>
  22 #include <fstream.h>
  23
  24 #include "AliMC.h"
  25 #include "AliConst.h"
  26
  27 #include "AliTPCParam.h"
  28 #include "AliTPCD.h"
  29
  30 ClassImp(AliTPCv1)
  31
  32 //_____________________________________________________________________________
  33 AliTPCv1::AliTPCv1(const char *name, const char *title)
  34   :AliTPC(name, title) {
  35   //
  36   // Standard constructor for Time Projection Chamber
  37   //
  38   fIdSens1=fIdSens2=0;
  39 }
  40
  41 //_____________________________________________________________________________
  42 void AliTPCv1::CreateGeometry()
  43 {
  44   //
  45   // Creates geometry for Time Projection Chamber version 1
  46   // Detailed geometry -- Fast simulation
  47   // Origin M.Kowalski
  48   //
  49   //Begin_Html
  50   /*
  51     <img src="picts/AliTPCv1.gif">
  52   */
  53   //End_Html
  54   //Begin_Html
  55   /*
  56     <img src="picts/AliTPCv1Tree.gif">
  57   */
  58   //End_Html
  59
  60   AliTPCParam * fTPCParam = &(fDigParam->GetParam());
  61
  62   Int_t *idtmed = fIdtmed->GetArray();
  63
  64   Float_t dm[21];
  65   Int_t idrotm[120];
  66
  67   Int_t nRotMat = 0;
  68
  69
  70   // ----------------------------------------------------
  71   //          FIELD CAGE WITH ENDCAPS - G10
  72   //          THIS IS ALSO A TPC MOTHER VOLUME
  73   // ----------------------------------------------------
  74
  75   dm[0] = 76.;
  76   dm[1] = 278.;
  77   dm[2] = 275.;
  78
  79   gMC->Gsvolu("TPC ", "TUBE", idtmed[8], dm, 3);
  80
  81   //-----------------------------------------------------
  82   //  Endcap cover c-fibre 0.86% X0
  83   //-----------------------------------------------------
  84
  85   dm[0] = 78.;
  86   dm[1] = 258.;
  87   dm[2] = 0.95;
  88
  89   gMC->Gsvolu("TPEC","TUBE",idtmed[10],dm,3);
  90
  91   //-----------------------------------------------------
  92   // Drift gas , leave 2 cm at the outer radius
  93   // and inner raddius
  94   //-----------------------------------------------------
  95
  96   dm[0] = 78.;
  97   dm[1] = 258.;
  98   dm[2] = 250.;
  99
 100   gMC->Gsvolu("TGAS", "TUBE", idtmed[3], dm, 3);
 101
 102
 103   //------------------------------------------------------
 104   //  membrane holder - carbon fiber
 105   //------------------------------------------------------
 106
 107
 108   gMC->Gsvolu("TPMH","TUBE",idtmed[6],dm,0);
 109
 110   dm[0] = 252.;
 111   dm[1] = 258.;
 112   dm[2] = 0.2;
 113
 114   gMC->Gsposp("TPMH",1,"TGAS",0.,0.,0.,0,"ONLY",dm,3);
 115
 116   dm[0] = 78.;
 117   dm[2] = 82.;
 118   dm[2] = 0.1;
 119
 120   gMC->Gsposp("TPMH",2,"TGAS",0.,0.,0.,0,"ONLY",dm,3);
 121
 122   //----------------------------------------------------------
 123   //  HV membrane - 25 microns of mylar
 124   //----------------------------------------------------------
 125
 126   dm[0] = 82.;
 127   dm[1] = 252.;
 128   dm[2] = 0.00125;
 129
 130   gMC->Gsvolu("TPHV","TUBE",idtmed[5],dm,3);
 131
 132   gMC->Gspos("TPHV",1,"TGAS",0.,0.,0.,0,"ONLY");
 133
 134   gMC->Gspos("TGAS",1,"TPC ",0.,0.,0.,0,"ONLY");
 135
 136   //----------------------------------------------------------
 137   // "side" gas volume, the same as the drift gas
 138   // the readout chambers are placed there.
 139   //----------------------------------------------------------
 140
 141   dm[0] = 78.;
 142   dm[1] = 258.;
 143   dm[2] = 0.5*(275. - 250.);
 144
 145   gMC->Gsvolu("TPSG", "TUBE", idtmed[2], dm, 3);
 146
 147   Float_t z_side = dm[2]; // 1/2 of the side gas thickness
 148
 149   //-----------------------------------------------------------
 150   //   Readout chambers , 25% of X0, I use Al as the material
 151   //-----------------------------------------------------------
 152
 153   Float_t InnerOpenAngle = fTPCParam->GetInnerAngle();
 154   Float_t OuterOpenAngle = fTPCParam->GetOuterAngle();
 155
 156   Float_t InnerAngleShift = fTPCParam->GetInnerAngleShift();
 157   Float_t OuterAngleShift = fTPCParam->GetOuterAngleShift();
 158
 159
 160   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
 161   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
 162
 163
 164   Float_t InSecLowEdge = fTPCParam->GetInSecLowEdge();
 165   Float_t InSecUpEdge =  fTPCParam->GetInSecUpEdge();
 166
 167   Float_t OuSecLowEdge = fTPCParam->GetOuSecLowEdge();
 168   Float_t OuSecUpEdge = fTPCParam->GetOuSecUpEdge();
 169
 170   Float_t SecThick = 2.225; // Al
 171
 172   Float_t edge = fTPCParam->GetEdge();
 173
 174   //  S (Inner) sectors
 175
 176   dm[0] = InSecLowEdge*TMath::Tan(0.5*InnerOpenAngle)-edge;
 177   dm[1] = InSecUpEdge*TMath::Tan(0.5*InnerOpenAngle)-edge;
 178   dm[2] = 0.5*SecThick;
 179   dm[3] = 0.5*(InSecUpEdge-InSecLowEdge);
 180
 181   Float_t xCenterS = InSecLowEdge+dm[3];
 182
 183   gMC->Gsvolu("TRCS", "TRD1", idtmed[0], dm, 4);
 184
 185   //  L (Outer) sectors
 186
 187   dm[0] = OuSecLowEdge*TMath::Tan(0.5*OuterOpenAngle)-edge;
 188   dm[1] = OuSecUpEdge*TMath::Tan(0.5*OuterOpenAngle)-edge;
 189   dm[2] = 0.5*SecThick;
 190   dm[3] = 0.5*(OuSecUpEdge-OuSecLowEdge);
 191
 192   Float_t xCenterL = OuSecLowEdge+dm[3];
 193
 194   gMC->Gsvolu("TRCL", "TRD1", idtmed[0], dm, 4);
 195
 196   Float_t z1 = -z_side + SecThick*0.5;
 197
 198   //------------------------------------------------------------------
 199   // S sectors - "gas sectors" (TRD1)
 200   //------------------------------------------------------------------
 201
 202   dm[0] = InSecLowEdge*TMath::Tan(0.5*InnerOpenAngle)-0.01;
 203   dm[1] = InSecUpEdge*TMath::Tan(0.5*InnerOpenAngle)-0.01;
 204   dm[2] = 0.5*(250. - 0.001);
 205   dm[3] = 0.5*(InSecUpEdge-InSecLowEdge);
 206
 207   gMC->Gsvolu("TSGA", "TRD1", idtmed[3], dm, 4); // nonsensitive
 208
 209   //------------------------------------------------------------------
 210   // sensitive strips - "pad rows"
 211   //------------------------------------------------------------------
 212
 213   Int_t ns;
 214   Float_t r1,r2,zz;
 215
 216   Float_t StripThick = 0.01; // 100 microns
 217   Float_t dead = fTPCParam->GetDeadZone();
 218
 219   gMC->Gsvolu("TSST", "TRD1", idtmed[4], dm, 0);
 220
 221   dm[2] = 0.5*(250. - 0.002);
 222   dm[3] = 0.5 * StripThick;
 223
 224
 225   // S-sector
 226
 227   for (ns = 0; ns < fTPCParam->GetNRowLow(); ns++) {
 228
 229     r1 = fTPCParam->GetPadRowRadiiLow(ns);
 230     r2 = r1 + StripThick;
 231     dm[0] = r1 * TMath::Tan(0.5*InnerOpenAngle) - dead;
 232     dm[1] = r2 * TMath::Tan(0.5*InnerOpenAngle) - dead;
 233
 234     zz = -InSecLowEdge -0.5*(InSecUpEdge-InSecLowEdge);
 235     zz += r1;
 236     zz += dm[3];
 237
 238     gMC->Gsposp("TSST", ns+1, "TSGA", 0., 0., zz, 0, "ONLY", dm, 4);
 239
 240
 241   }
 242
 243   //-----------------------------------------------------------------
 244   //  L sectors - "gas sectors" (PGON to avoid overlaps)
 245   //-----------------------------------------------------------------
 246
 247   dm[0] = 360.*kDegrad - 0.5*OuterOpenAngle;
 248   dm[0] *= kRaddeg;
 249   dm[0] = (Float_t)TMath::Nint(dm[0]);
 250
 251   dm[1] = OuterOpenAngle*kRaddeg;
 252   dm[1] = (Float_t)TMath::Nint(dm[1]);
 253
 254   dm[2] = 1.;
 255   dm[3] = 4.;
 256
 257   dm[4] = 0.002;
 258   dm[5] = OuSecLowEdge;
 259   dm[6] = 252.*TMath::Cos(0.5*OuterOpenAngle)-0.002;
 260
 261   dm[7] = dm[4]+0.2;
 262   dm[8] = dm[5];
 263   dm[9] = dm[6];
 264
 265   dm[10] = dm[7];
 266   dm[11] = OuSecLowEdge;
 267   dm[12] = OuSecUpEdge;
 268
 269   dm[13] = 250.;
 270   dm[14] = dm[11];
 271   dm[15] = dm[12];
 272
 273   gMC->Gsvolu("TLGA","PGON",idtmed[3],dm,16);
 274
 275   //------------------------------------------------------------------
 276   // sensitive strips - "pad rows"
 277   //------------------------------------------------------------------
 278
 279   Float_t rmax = dm[6];
 280
 281   // L-sectors
 282
 283   gMC->Gsvolu("TLST", "PGON", idtmed[4], dm, 0);
 284
 285   dm[0] = 360.*kDegrad - 0.5*OuterOpenAngle;
 286   dm[0] *= kRaddeg;
 287   dm[0] = (Float_t)TMath::Nint(dm[0]);
 288
 289   dm[1] = OuterOpenAngle*kRaddeg;
 290   dm[1] = (Float_t)TMath::Nint(dm[1]);
 291
 292   dm[2] = 1.;
 293   dm[3] = 2.;
 294
 295   dm[7] = 250.;
 296
 297   Float_t xx = dead/TMath::Tan(0.5*OuterOpenAngle);
 298
 299   for(ns=0;ns<fTPCParam->GetNRowUp();ns++){
 300
 301     r1 = fTPCParam->GetPadRowRadiiUp(ns)-xx;
 302     r2 = r1 + StripThick;
 303
 304     dm[5] = r1;
 305     dm[6] = r2;
 306
 307     dm[8] = r1;
 308     dm[9] = r2;
 309
 310     if(r2+xx < rmax){
 311       dm[4] = 0.002;
 312     }
 313     else{
 314       dm[4] = 0.202;
 315     }
 316
 317     gMC->Gsposp("TLST",ns+1,"TLGA",xx,0.,0.,0,"ONLY",dm,10);
 318
 319   }
 320
 321   //------------------------------------------------------------------
 322   // Positioning of the S-sector readout chambers
 323   //------------------------------------------------------------------
 324
 325   Float_t zs = 0.5*(250.+0.002);
 326
 327   Float_t theta1,theta2,theta3;
 328   Float_t phi1,phi2,phi3;
 329   Float_t alpha;
 330   Float_t x,y;
 331
 332   for(ns=0;ns<nInnerSector;ns++){
 333
 334     phi1 = ns * InnerOpenAngle + 270.*kDegrad + InnerAngleShift;
 335     phi1 *= kRaddeg; // in degrees
 336
 337     phi1 = (Float_t)TMath::Nint(phi1);
 338
 339     if (phi1 > 360.) phi1 -= 360.;
 340
 341
 342     theta1 = 90.;
 343     phi2   = 90.;
 344     theta2 = 180.;
 345     phi3   = ns * InnerOpenAngle + InnerAngleShift;
 346     phi3 *= kRaddeg; // in degrees
 347
 348     phi3 = (Float_t)TMath::Nint(phi3);
 349
 350     if(phi3 > 360.) phi3 -= 360.;
 351
 352     theta3 = 90.;
 353
 354     alpha = phi3*kDegrad;
 355
 356     x = xCenterS * TMath::Cos(alpha);
 357     y = xCenterS * TMath::Sin(alpha);
 358
 359     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 360
 361     gMC->Gspos("TRCS", ns+1, "TPSG", x, y, z1, idrotm[nRotMat], "ONLY");
 362
 363     gMC->Gspos("TSGA",ns+1,"TGAS",x,y,zs,idrotm[nRotMat], "ONLY");
 364     gMC->Gspos("TSGA",ns+1+nInnerSector,"TGAS",x,y,-zs,idrotm[nRotMat], "ONLY");
 365
 366     nRotMat++;
 367
 368   }
 369
 370   //-------------------------------------------------------------------
 371   //  Positioning of the L-sectors readout chambers
 372   //-------------------------------------------------------------------
 373
 374   for(ns=0;ns<nOuterSector;ns++){
 375     phi1 = ns * OuterOpenAngle + 270.*kDegrad + OuterAngleShift;
 376     phi1 *= kRaddeg; // in degrees
 377
 378     phi1 = (Float_t)TMath::Nint(phi1);
 379
 380
 381     if (phi1 > 360.) phi1 -= 360.;
 382
 383     theta1 = 90.;
 384     phi2   = 90.;
 385     theta2 = 180.;
 386     phi3   = ns * OuterOpenAngle+OuterAngleShift;
 387     phi3 *= kRaddeg; // in degrees
 388
 389     phi3 = (Float_t)TMath::Nint(phi3);
 390
 391
 392     if(phi3 > 360.) phi3 -= 360.;
 393
 394     theta3 = 90.;
 395
 396     alpha = phi3*kDegrad;
 397
 398     x = xCenterL * TMath::Cos(alpha);
 399     y = xCenterL * TMath::Sin(alpha);
 400
 401     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 402
 403
 404     gMC->Gspos("TRCL", ns+1, "TPSG", x, y, z1, idrotm[nRotMat], "ONLY");
 405
 406     nRotMat++;
 407
 408   }
 409
 410   //-------------------------------------------------------------------
 411   // Positioning of the L-sectors (gas sectors)
 412   //-------------------------------------------------------------------
 413
 414   for(ns=0;ns<nOuterSector;ns++){
 415
 416      phi1 = ns*OuterOpenAngle + OuterAngleShift;
 417      phi1 *= kRaddeg;
 418
 419      phi1 = (Float_t)TMath::Nint(phi1);
 420      if(phi1>360.) phi1 -= 360.;
 421
 422      theta1 = 90.;
 423
 424      phi2 = 90. + phi1;
 425      if(phi2>360.) phi2 -= 360.;
 426
 427      theta2 = 90.;
 428
 429      phi3 = 0.;
 430      theta3 = 0.;
 431
 432      alpha = phi1*kDegrad;
 433
 434
 435      AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 436
 437
 438      gMC->Gspos("TLGA",ns+1,"TGAS" ,0.,0.,0.,idrotm[nRotMat],"ONLY");
 439
 440      nRotMat++;
 441
 442      // reflection !!
 443
 444      phi3 = 0.;
 445      theta3 = 180.;
 446
 447      AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 448
 449      gMC->Gspos("TLGA",ns+1+nOuterSector,"TGAS" ,0.,0.,0.,idrotm[nRotMat],"ONLY");
 450
 451     nRotMat++;
 452   }
 453
 454   Float_t z0 = z_side - 0.95;
 455
 456   gMC->Gspos("TPEC",1,"TPSG",0.,0.,z0,0,"ONLY");
 457
 458   // ==========================================================
 459   //                  wheels
 460   // ==========================================================
 461
 462   //
 463   //  auxilary structures
 464   //
 465
 466
 467   gMC->Gsvolu("TPWI","TUBE",idtmed[24],dm,0); // "air"
 468
 469   // ----------------------------------------------------------
 470   //       Large wheel -> positioned in the TPC
 471   // ----------------------------------------------------------
 472
 473
 474   z0 = 263.5; // TPC length - 1/2 spoke wheel width
 475
 476   dm[0] = 258.;
 477   dm[1] = 278.;
 478   dm[2] = 11.5;
 479
 480   gMC->Gsvolu("TPWL", "TUBE", idtmed[0], dm, 3);
 481
 482   dm[0] = dm[0]+2.;
 483   dm[1] = 278.;
 484   dm[2] = dm[2]-2.;
 485
 486   gMC->Gsposp("TPWI",1,"TPWL",0.,0.,0.,0,"ONLY",dm,3);
 487
 488   gMC->Gspos("TPWL", 1, "TPC ", 0, 0, z0, 0, "ONLY");
 489   gMC->Gspos("TPWL", 2, "TPC ", 0, 0, -z0, 0, "ONLY");
 490
 491   //
 492   //  Outer vessel + CO2 HV degrader
 493   //
 494
 495   dm[0] = 260.;
 496   dm[1] = 278.;
 497   dm[2] = 252.;
 498
 499   gMC->Gsvolu("TPCO","TUBE",idtmed[12],dm,3);
 500
 501   dm[0] = 275.;
 502   dm[1] = 278.;
 503
 504   gMC->Gsvolu("TPOV","TUBE",idtmed[10],dm,3);
 505
 506   gMC->Gspos("TPOV",1,"TPCO",0.,0.,0.,0,"ONLY");
 507
 508
 509   // G10 plugs
 510
 511   dm[0] = 258.;
 512   dm[1] = 260.;
 513   dm[2] = 1.;
 514
 515   gMC->Gsvolu("TPG1","TUBE",idtmed[8],dm,3);
 516   gMC->Gspos("TPG1",1,"TPCO",0.,0.,251.,0,"ONLY");
 517   gMC->Gspos("TPG1",2,"TPCO",0.,0.,-251.,0,"ONLY");
 518
 519   gMC->Gspos("TPCO",1,"TPC ",0.,0.,0.,0,"ONLY");
 520
 521
 522   //----------------------------------------------------------
 523   //  Small wheel -> positioned in "side gas
 524   //----------------------------------------------------------
 525
 526   dm[0] = 78.;
 527   dm[1] = 82.;
 528   dm[2] = 11.5;
 529
 530   gMC->Gsvolu("TPWS", "TUBE", idtmed[0], dm, 3);
 531
 532   dm[0] = 78.;
 533   dm[1] = dm[1]-2;
 534   dm[2] = dm[2]-2.;
 535
 536   gMC->Gsvolu("TPW1", "TUBE", idtmed[2], dm, 3);
 537
 538   gMC->Gspos("TPW1", 1, "TPWS", 0., 0., 0., 0, "ONLY");
 539
 540   z0 = 1.; // spoke wheel is shifted w.r.t. center of the "side gas"
 541
 542   gMC->Gspos("TPWS", 1, "TPSG", 0, 0, z0, 0, "ONLY");
 543
 544
 545   // to avoid overlaps
 546
 547   dm[0] = 76.;
 548   dm[1] = 78.;
 549   dm[2] = 11.5;
 550
 551   gMC->Gsvolu("TPS1","TUBE",idtmed[0],dm,3);
 552
 553   dm[2] = 9.5;
 554
 555   gMC->Gsvolu("TPS2","TUBE",idtmed[24],dm,3);
 556
 557   gMC->Gspos("TPS2",1,"TPS1",0.,0.,0.,0,"ONLY");
 558
 559   z0= 263.5;
 560
 561   gMC->Gspos("TPS1",1,"TPC ",0.,0.,z0,0,"ONLY");
 562   gMC->Gspos("TPS1",2,"TPC ",0.,0.,-z0,0,"ONLY");
 563
 564   // G10 plug
 565
 566   dm[0] = 76.;
 567   dm[2] = 78.;
 568   dm[3] = 1.;
 569
 570   gMC->Gsvolu("TPG2","TUBE",idtmed[8],dm,3);
 571
 572   z0 = 251.;
 573
 574   gMC->Gspos("TPG2",1,"TPC ",0.,0.,z0,0,"ONLY");
 575   gMC->Gspos("TPG2",2,"TPC ",0.,0.,-z0,0,"ONLY");
 576
 577
 578   //---------------------------------------------------------
 579   //  central wheel  6 (radial direction) x 4 (along z) cm2
 580   //---------------------------------------------------------
 581
 582   dm[0] = 140.;
 583   dm[1] = 146.;
 584   dm[2] = 2.;
 585
 586   gMC->Gsvolu("TPWC","TUBE",idtmed[0],dm,3);
 587
 588   dm[0] = dm[0] + 2.;
 589   dm[1] = dm[1] - 2.;
 590   dm[2] = dm[2] - 1.;
 591
 592   gMC->Gsposp("TPWI",2,"TPWC",0.,0.,0.,0,"ONLY",dm,3);
 593
 594   z0 = z_side - 1.9 - 2.;
 595
 596   gMC->Gspos("TPWC",1,"TPSG",0.,0.,z0,0,"ONLY");
 597
 598   //
 599
 600   gMC->Gsvolu("TPSE","BOX ",idtmed[24],dm,0); // "empty" part of the spoke
 601
 602
 603   //---------------------------------------------------------
 604   //  inner spokes (nSectorInner)
 605   //---------------------------------------------------------
 606
 607   dm[0] = 0.5*(139.9-82.1);
 608   dm[1] = 3.;
 609   dm[2] = 2.;
 610
 611   Float_t x1 = dm[0]+82.;
 612
 613   gMC->Gsvolu("TPSI","BOX",idtmed[0],dm,3);
 614
 615   dm[1] = dm[1]-1.;
 616   dm[2] = dm[2]-1.;
 617
 618   gMC->Gsposp("TPSE",1,"TPSI",0.,0.,0.,0,"ONLY",dm,3);
 619
 620   for(ns=0;ns<nInnerSector;ns++){
 621
 622     phi1 = 0.5*InnerOpenAngle + ns*InnerOpenAngle + InnerAngleShift;
 623     theta1=90.;
 624     phi1 *=kRaddeg;
 625
 626     phi1 = (Float_t)TMath::Nint(phi1);
 627     if(phi1>360.) phi1 -= 360.;
 628
 629     phi2 = phi1+90.;
 630     if(phi2>360.) phi2 -= 360.;
 631     theta2=90.;
 632     phi3=0.;
 633     theta3=0.;
 634
 635     alpha = phi1 * kDegrad;
 636     x     = x1 * TMath::Cos(alpha);
 637     y     = x1 * TMath::Sin(alpha);
 638
 639    AliMatrix(idrotm[nRotMat],theta1,phi1,theta2,phi2,theta3,phi3);
 640
 641    gMC->Gspos("TPSI",ns+1,"TPSG",x,y,z0,idrotm[nRotMat],"ONLY");
 642
 643    nRotMat++;
 644
 645   }
 646
 647   //-------------------------------------------------------------
 648   // outer spokes (nSectorOuter)
 649   //-------------------------------------------------------------
 650
 651   dm[0] = 0.5*(257.9-146.1);
 652   dm[1] = 3.;
 653   dm[2] = 2.;
 654
 655   x1 = dm[0] + 146.;
 656
 657   gMC->Gsvolu("TPSO","BOX ",idtmed[0],dm,3);
 658
 659   dm[1] = dm[1] - 1.;
 660   dm[2] = dm[2] - 1.;
 661
 662   gMC->Gsposp("TPSE",2,"TPSO",0.,0.,0.,0,"ONLY",dm,3);
 663
 664   for(ns=0;ns<nOuterSector;ns++){
 665
 666     phi1 = 0.5*OuterOpenAngle + ns*OuterOpenAngle + OuterAngleShift;
 667     theta1=90.;
 668     phi1 *=kRaddeg;
 669
 670     phi1 = (Float_t)TMath::Nint(phi1);
 671     if(phi1>360.) phi1 -= 360.;
 672
 673     phi2 = phi1+90.;
 674     if(phi2>360.) phi2 -= 360.;
 675     theta2=90.;
 676     phi3=0.;
 677     theta3=0.;
 678
 679     alpha = phi1 * kDegrad;
 680     x     = x1 * TMath::Cos(alpha);
 681     y     = x1 * TMath::Sin(alpha);
 682
 683    AliMatrix(idrotm[nRotMat],theta1,phi1,theta2,phi2,theta3,phi3);
 684
 685    gMC->Gspos("TPSO",ns+1,"TPSG",x,y,z0,idrotm[nRotMat],"ONLY");
 686
 687    nRotMat++;
 688
 689   }
 690
 691
 692
 693   // --------------------------------------------------------
 694   //         put the readout chambers into the TPC
 695   // --------------------------------------------------------
 696
 697   theta1 = 90.;
 698   phi1   = 0.;
 699   theta2 = 90.;
 700   phi2   = 270.;
 701   theta3 = 180.;
 702   phi3   = 0.;
 703
 704   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
 705
 706   z0 = z_side + 250.;
 707
 708   gMC->Gspos("TPSG", 1, "TPC ", 0, 0, z0, 0, "ONLY");
 709   gMC->Gspos("TPSG", 2, "TPC ", 0, 0, -z0, idrotm[nRotMat], "ONLY");
 710
 711   gMC->Gspos("TPC ", 1, "ALIC", 0, 0, 0, 0, "ONLY");
 712
 713   //----------------------------------------------------
 714   //  Inner vessel and HV degrader
 715   //----------------------------------------------------
 716
 717   dm[0] = 0.;
 718   dm[1] = 360.;
 719   dm[2] = 4.;
 720
 721   dm[3] = -250.;
 722   dm[4] = 74.4;
 723   dm[5] = 76.;
 724
 725   dm[6] = -64.5;
 726   dm[7] = 50.;
 727   dm[8] = 76.;
 728
 729   dm[9] = -64.5;
 730   dm[10] = 50.;
 731   dm[11] = 76.;
 732
 733   dm[12] = 250.;
 734   dm[13] = 74.4;
 735   dm[14] = 76.;
 736
 737   gMC->Gsvolu("TPVD", "PCON", idtmed[12], dm, 15); // CO2
 738
 739   // cone parts
 740
 741   dm[0] = 0.;
 742   dm[1] = 360.;
 743   dm[2] = 2.;
 744
 745   dm[3] = 64.5;
 746   dm[4] = 50.;
 747   dm[5] = 51.6;
 748
 749   dm[6] = 250.;
 750   dm[7] = 74.4;
 751   dm[8] = 76.;
 752
 753
 754   gMC->Gsvolu("TIVC","PCON",idtmed[11],dm,9); // C-fibre
 755
 756   gMC->Gspos("TIVC",1,"TPVD",0.,0.,0.,0,"ONLY");
 757   gMC->Gspos("TIVC",2,"TPVD",0.,0.,0.,idrotm[nRotMat],"ONLY");
 758
 759   // barrel part
 760
 761   dm[0] = 50.;
 762   dm[1] = 50.5;
 763   dm[2] = 32.25;
 764
 765   gMC->Gsvolu("TIVB","TUBE",idtmed[9],dm,3);
 766
 767   gMC->Gspos("TIVB",1,"TPVD",0.,0.,0.,0,"ONLY");
 768
 769   gMC->Gspos("TPVD",1,"ALIC",0.,0.,0.,0,"ONLY");
 770
 771
 772
 773
 774
 775   // ---------------------------------------------------
 776   //               volumes ordering
 777   // ---------------------------------------------------
 778   gMC->Gsord("TGAS", 6);
 779   gMC->Gsord("TPSG", 6);
 780   gMC->Gsord("TSGA", 3);
 781   gMC->Gsord("TLGA", 4);
 782
 783 } // end of function
 784
 785
 786 //_____________________________________________________________________________
 787 void AliTPCv1::DrawDetector()
 788 {
 789   //
 790   // Draw a shaded view of the Time Projection Chamber version 1
 791   //
 792
 793   // Set everything unseen
 794   gMC->Gsatt("*", "seen", -1);
 795   //
 796   // Set ALIC mother transparent
 797   gMC->Gsatt("ALIC","SEEN",0);
 798   //
 799   // Set the volumes visible
 800   gMC->Gsatt("TPC","SEEN",0);
 801   gMC->Gsatt("TGAS","SEEN",0);
 802   gMC->Gsatt("TPSG","SEEN",0);
 803   gMC->Gsatt("TPHV","SEEN",1);
 804   gMC->Gsatt("TPMH","SEEN",1);
 805   gMC->Gsatt("TPEC","SEEN",0);
 806   gMC->Gsatt("TRCS","SEEN",1);
 807   gMC->Gsatt("TRCL","SEEN",1);
 808   gMC->Gsatt("TPWL","SEEN",1);
 809   gMC->Gsatt("TPWI","SEEN",1);
 810   gMC->Gsatt("TPWS","SEEN",1);
 811   gMC->Gsatt("TPW1","SEEN",1);
 812   gMC->Gsatt("TPS1","SEEN",1);
 813   gMC->Gsatt("TPS2","SEEN",1);
 814   gMC->Gsatt("TPG1","SEEN",1);
 815   gMC->Gsatt("TPG2","SEEN",1);
 816   gMC->Gsatt("TPWC","SEEN",1);
 817   gMC->Gsatt("TPSI","SEEN",1);
 818   gMC->Gsatt("TPSO","SEEN",1);
 819   gMC->Gsatt("TPCO","SEEN",1);
 820   gMC->Gsatt("TPOV","SEEN",1);
 821   gMC->Gsatt("TPVD","SEEN",1);
 822   //
 823   gMC->Gdopt("hide", "on");
 824   gMC->Gdopt("shad", "on");
 825   gMC->Gsatt("*", "fill", 7);
 826   gMC->SetClipBox(".");
 827   gMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
 828   gMC->DefaultRange();
 829   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
 830   gMC->Gdhead(1111, "Time Projection Chamber");
 831   gMC->Gdman(18, 4, "MAN");
 832   gMC->Gdopt("hide","off");
 833 }
 834
 835 //_____________________________________________________________________________
 836 void AliTPCv1::CreateMaterials()
 837 {
 838   //
 839   // Define materials for Time Projection Chamber
 840   //
 841   AliTPC::CreateMaterials();
 842 }
 843
 844 //_____________________________________________________________________________
 845 void AliTPCv1::Init()
 846 {
 847   //
 848   // Initialises TPC detector after it has been created
 849   //
 850
 851   fIdSens1=gMC->VolId("TLST"); // L-sector
 852   fIdSens2=gMC->VolId("TSST"); // S-sector
 853
 854   printf("TPC version 1 initialized\n");
 855 }
 856
 857 //_____________________________________________________________________________
 858 void AliTPCv1::StepManager()
 859 {
 860   //
 861   // Called at every step in the Time Projection Chamber
 862   //
 863   Int_t         copy, id, i;
 864   Float_t       hits[4];
 865   Int_t         vol[2];
 866   TLorentzVector p;
 867   TClonesArray &lhits = *fHits;
 868
 869   AliTPCParam *fTPCParam = &(fDigParam->GetParam());
 870
 871   //
 872
 873   if(gMC->TrackCharge() && gMC->IsTrackEntering()) {
 874     //
 875     // Only entering charged tracks
 876     //
 877     if((id=gMC->CurrentVolID(copy))==fIdSens1) {
 878
 879       // L
 880
 881       vol[1]=copy-1; // row
 882       id=gMC->CurrentVolOffID(1,copy);
 883       vol[0]=copy+fTPCParam->GetNInnerSector()-1; // sector
 884     } else if(id==fIdSens2) {
 885
 886       // S
 887
 888       vol[1]=copy-1; // row
 889       id=gMC->CurrentVolOffID(1,copy); // sector
 890       vol[0]=copy-1;
 891     } else return;
 892
 893     gMC->TrackPosition(p);
 894     for(i=0;i<3;++i) hits[i]=p[i];
 895     hits[3]=0;
 896     new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 897   }
 898 }
 899
 900
 901