TPC/AliTPCv1.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 1 -- detailed TPC and fast simulation    //
  22 //                                                                           //
  23 //Begin_Html
  24 /*
  25 <img src="picts/AliTPCv1Class.gif">
  26 */
  27 //End_Html
  28 //                                                                           //
  29 //                                                                           //
  30 ///////////////////////////////////////////////////////////////////////////////
  31
  32 #include <Riostream.h>
  33 #include <stdlib.h>
  34 #include <TBRIK.h>
  35 #include <TGeometry.h>
  36 #include <TInterpreter.h>
  37 #include <TMath.h>
  38 #include <TNode.h>
  39 #include <TTUBE.h>
  40 #include <TVirtualMC.h>
  41 #include <TString.h>
  42 #include <TSystem.h>
  43
  44 #include "AliConst.h"
  45 #include "AliRun.h"
  46 #include "AliTPCDigitsArray.h"
  47 #include "AliTPCParam.h"
  48 #include "AliTPCParamSR.h"
  49 #include "AliTPCv1.h"
  50 #include "TLorentzVector.h"
  51 #include "AliMC.h"
  52 #include "TGeoManager.h"
  53 #include "TGeoVolume.h"
  54 #include "TGeoPcon.h"
  55 #include "TGeoTube.h"
  56 #include "TGeoPgon.h"
  57 #include "TGeoTrd1.h"
  58 #include "TGeoCompositeShape.h"
  59 #include "TGeoPara.h"
  60 ClassImp(AliTPCv1)
  61
  62 //_____________________________________________________________________________
  63
  64   AliTPCv1::AliTPCv1():AliTPC(),fIdSens(0)
  65 {
  66
  67   fHitType = 1;
  68
  69 }
  70
  71 //_____________________________________________________________________________
  72 AliTPCv1::AliTPCv1(const char *name, const char *title)
  73   :AliTPC(name, title),fIdSens(0)
  74  {
  75   //
  76   // Standard constructor for Time Projection Chamber
  77   //
  78
  79
  80   if (fTPCParam)
  81      fTPCParam->Write(fTPCParam->GetTitle());
  82
  83   fHitType=1;
  84 }
  85
  86 //_____________________________________________________________________________
  87 void AliTPCv1::CreateGeometry()
  88 {
  89   //-------------------------------------------------------------
  90   // Creates geometry for Time Projection Chamber version 1
  91   // Detailed geometry -- Fast simulation - space points
  92   // at the pad-rows centers
  93   // Origin M.Kowalski, INP Cracow, Marek.Kowalski@ifj.edu.pl
  94   //-----------------------------------------------------------
  95
  96   //Begin_Html
  97   /*
  98     <img src="picts/AliTPC.gif">
  99   */
 100   //End_Html
 101   //Begin_Html
 102   /*
 103     <img src="picts/AliTPCv1Tree.gif">
 104   */
 105   //End_Html
 106   //----------------------------------------------------------
 107   // This geometry is written using TGeo class
 108   // Firstly the shapes are defined, and only then the volumes
 109   // What is recognized by the MC are volumes
 110   //----------------------------------------------------------
 111   //
 112   //  tpc - this will be the mother volume
 113   //
 114
 115   //
 116   // here I define a volume TPC
 117   // retrive the medium name with "TPC_" as a leading string
 118   //
 119   TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
 120   tpc->DefineSection(0,-290.,77.,278.);
 121   tpc->DefineSection(1,-259.6,70.,278.);
 122   //
 123   tpc->DefineSection(2,-259.6,68.1,278.);
 124   tpc->DefineSection(3,-253.6,68.1,278.);
 125   //
 126   tpc->DefineSection(4,-253.6,68.,278.);
 127   tpc->DefineSection(5,-74.0,60.8,278.);
 128   //
 129   tpc->DefineSection(6,-74.0,60.1,278.);
 130   tpc->DefineSection(7,-73.3,60.1,278.);
 131   //
 132   tpc->DefineSection(8,-73.3,56.9,278.);
 133   tpc->DefineSection(9,73.3,56.9,278.);
 134   //
 135   tpc->DefineSection(10,73.3,60.1,278.);
 136   tpc->DefineSection(11,74.0,60.1,278.);
 137   //
 138   tpc->DefineSection(12,74.0,60.8,278.);
 139   tpc->DefineSection(13,253.6,65.5,278.);
 140   //
 141   tpc->DefineSection(14,253.6,65.6,278.);
 142   tpc->DefineSection(15,259.6,65.6,278.);
 143   //
 144   tpc->DefineSection(16,259.6,70.0,278.);
 145   tpc->DefineSection(17,290.,77.,278.);
 146   //
 147   TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
 148   TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
 149   //
 150   // drift volume - sensitive volume, extended beyond the
 151   // endcaps, because of the alignment
 152   //
 153   TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
 154   dvol->DefineSection(0,-260.,74.5,264.4);
 155   dvol->DefineSection(1,-253.6,74.5,264.4);
 156   //
 157   dvol->DefineSection(2,-253.6,76.6774,258.);
 158   dvol->DefineSection(3,253.6,76.6774,258.);
 159   //
 160   dvol->DefineSection(4,253.6,74.5,264.4);
 161   dvol->DefineSection(5,260.,74.5,264.4);
 162   //
 163   TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-1");
 164   TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
 165   //
 166   //
 167   v1->AddNode(v9,1);
 168   //
 169   // outer insulator
 170   //
 171   TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
 172   //
 173   tpco->DefineSection(0,-256.6,264.8,278.);
 174   tpco->DefineSection(1,-253.6,264.8,278.);
 175   //
 176   tpco->DefineSection(2,-253.6,258.,278.);
 177   tpco->DefineSection(3,250.6,258.,278.);
 178   //
 179   tpco->DefineSection(4,250.6,258.,275.5);
 180   tpco->DefineSection(5,253.6,258.,275.5);
 181   //
 182   TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
 183   TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
 184   //
 185   // outer containment vessel
 186   //
 187   TGeoPcon *tocv = new TGeoPcon(0.,360.,6);  // containment vessel
 188   //
 189   tocv->DefineSection(0,-256.6,264.8,278.);
 190   tocv->DefineSection(1,-253.6,264.8,278.);
 191   //
 192   tocv->DefineSection(2,-253.6,274.8124,278.);
 193   tocv->DefineSection(3,247.6,274.8124,278.);
 194   //
 195   tocv->DefineSection(4,247.6,270.4,278.);
 196   tocv->DefineSection(5,250.6,270.4,278.);
 197   //
 198   TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
 199   TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
 200   //
 201   TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
 202   TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
 203   TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
 204   TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
 205   //
 206   TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
 207   TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
 208   TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
 209   TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
 210   //
 211   TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
 212   TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
 213   TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
 214   TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
 215
 216   //-------------------------------------------------------
 217   //  Tpc Outer Field Cage
 218   //  daughters - composite (sandwich)
 219   //-------------------------------------------------------
 220
 221   TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
 222   //
 223   tofc->DefineSection(0,-253.6,258.,269.6);
 224   tofc->DefineSection(1,-250.6,258.,269.6);
 225   //
 226   tofc->DefineSection(2,-250.6,258.,260.0676);
 227   tofc->DefineSection(3,250.6,258.,260.0676);
 228   //
 229   tofc->DefineSection(4,250.6,258.,275.5);
 230   tofc->DefineSection(5,253.6,258.,275.5);
 231   //
 232   TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
 233   //sandwich
 234   TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
 235   TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
 236   TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
 237   //
 238   TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
 239   //
 240   TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
 241   TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
 242   TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
 243   //
 244   // outer part - positioning
 245   //
 246   tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
 247   //
 248   tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
 249   //
 250   v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
 251   //
 252   v2->AddNode(v3,1); v2->AddNode(v4,1);
 253   //
 254   v1->AddNode(v2,1);
 255   //--------------------------------------------------------------------
 256   // Tpc Inner INsulator (CO2)
 257   // the cones, the central drum and the inner f.c. sandwich with a piece
 258   // of the flane will be placed in the TPC
 259   //--------------------------------------------------------------------
 260   TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
 261   //
 262   tpci->DefineSection(0,-253.6,68.4,76.6774);
 263   tpci->DefineSection(1,-74.0,61.2,76.6774);
 264   //
 265   tpci->DefineSection(2,74.0,61.2,76.6774);
 266   //
 267   tpci->DefineSection(3,253.6,65.9,76.6774);
 268   //
 269   TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
 270   //
 271   // now the inner field cage - only part of flanges (2 copies)
 272   //
 273   TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
 274   TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
 275   //
 276  //---------------------------------------------------------
 277   // Tpc Inner Containment vessel - Muon side
 278   //---------------------------------------------------------
 279   TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
 280   //
 281   tcms->DefineSection(0,-259.1,68.1,74.2);
 282   tcms->DefineSection(1,-253.6,68.1,74.2);
 283   //
 284   tcms->DefineSection(2,-253.6,68.1,68.4);
 285   tcms->DefineSection(3,-74.0,60.9,61.2);
 286   //
 287   tcms->DefineSection(4,-74.0,60.1,61.2);
 288   tcms->DefineSection(5,-73.3,60.1,61.2);
 289   //
 290   tcms->DefineSection(6,-73.3,56.9,61.2);
 291   tcms->DefineSection(7,-73.0,56.9,61.2);
 292   //
 293   tcms->DefineSection(8,-73.0,56.9,58.8);
 294   tcms->DefineSection(9,-71.3,56.9,58.8);
 295   //
 296   TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
 297   //-----------------------------------------------
 298   // inner containment vessel - shaft side
 299   //-----------------------------------------------
 300   TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
 301   //
 302   tcss->DefineSection(0,71.3,56.9,58.8);
 303   tcss->DefineSection(1,73.0,56.9,58.8);
 304   //
 305   tcss->DefineSection(2,73.0,56.9,61.2);
 306   tcss->DefineSection(3,73.3,56.9,61.2);
 307   //
 308   tcss->DefineSection(4,73.3,60.1,61.2);
 309   tcss->DefineSection(5,74.0,60.1,61.2);
 310   //
 311   tcss->DefineSection(6,74.0,60.9,61.2);
 312   tcss->DefineSection(7,253.6,65.6,65.9);
 313   //
 314   tcss->DefineSection(8,253.6,65.6,74.2);
 315   tcss->DefineSection(9,258.1,65.6,74.2);
 316   //
 317   TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
 318   //-----------------------------------------------
 319   //  Inner field cage
 320   //  define 4 parts and make an assembly
 321   //-----------------------------------------------
 322   // part1 - Al - 2 copies
 323   TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
 324   TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
 325   // sandwich - outermost parts - 2 copies
 326   TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
 327   TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
 328   TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
 329   TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
 330   //
 331   TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
 332   TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
 333   TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
 334   TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
 335   //
 336   // middle parts - 2 copies
 337   TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
 338   TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
 339   TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
 340   TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
 341   //
 342   TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
 343   TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
 344   TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
 345   TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
 346   // central part - 1 copy
 347   TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
 348   TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
 349   TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
 350   //
 351   TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
 352   TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
 353   TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
 354   //
 355   // inner part - positioning
 356   //
 357   // creating a sandwich
 358   tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
 359   //
 360   tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
 361   //
 362   tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
 363   //
 364   TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
 365   //
 366   tv100->AddNode(tv10,1);
 367   tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
 368   tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
 369   tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
 370   tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
 371   tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
 372   tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
 373   //
 374   v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
 375   v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
 376   v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
 377   v9->AddNode(tv100,1);
 378   //
 379   // central drum
 380   //
 381   // flange + sandwich
 382   //
 383   TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
 384   cfl->DefineSection(0,-71.1,59.7,61.2);
 385   cfl->DefineSection(1,-68.6,59.7,61.2);
 386   //
 387   cfl->DefineSection(2,-68.6,60.6324,61.2);
 388   cfl->DefineSection(3,68.6,60.6324,61.2);
 389   //
 390   cfl->DefineSection(4,68.6,59.7,61.2);
 391   cfl->DefineSection(5,71.1,59.7,61.2);
 392   //
 393   TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
 394   // sandwich
 395   TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
 396   TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
 397   TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
 398   //
 399   TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
 400   TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
 401   TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
 402   TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
 403   //
 404   // seals for central drum 2 copies
 405   //
 406   TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
 407   TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
 408   TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
 409   v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.));
 410   v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.));
 411   //
 412   // seal collars
 413   TGeoPcon *se = new TGeoPcon(0.,360.,6);
 414   se->DefineSection(0,-72.8,59.7,61.2);
 415   se->DefineSection(1,-72.3,59.7,61.2);
 416   //
 417   se->DefineSection(2,-72.3,58.85,61.2);
 418   se->DefineSection(3,-71.6,58.85,61.2);
 419   //
 420   se->DefineSection(4,-71.6,59.7,61.2);
 421   se->DefineSection(5,-71.3,59.7,61.2);
 422   //
 423   TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
 424   //
 425   TGeoTube *si = new TGeoTube(56.9,58.8,1.);
 426   TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
 427   //
 428   // define reflection matrix
 429   //
 430   TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
 431   //
 432   cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
 433   //
 434   v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
 435   v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
 436   v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
 437   //
 438   // central membrane - 2 rings and a mylar membrane - assembly
 439   //
 440   TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
 441   TGeoTube *oh = new TGeoTube(250.,256.,.5);
 442   TGeoTube *mem = new TGeoTube(84.05,250,0.01);
 443   TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
 444   TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
 445   TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
 446   //
 447   TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
 448   cm->AddNode(ihv,1);
 449   cm->AddNode(ohv,1);
 450   cm->AddNode(memv,1);
 451   v9->AddNode(cm,1);
 452   //
 453   // end caps - they are make as an assembly of single segments
 454   // containing both readout chambers
 455   //
 456   Double_t openingAngle = 10.*TMath::DegToRad();
 457   Double_t thick=1.5; // rib
 458   Double_t shift = thick/TMath::Sin(openingAngle);
 459   //
 460   Double_t lowEdge = 86.3; // hole in the wheel
 461   Double_t upEdge = 240.4; // hole in the wheel
 462   //
 463   new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
 464   //
 465   TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
 466   //
 467   hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
 468   hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
 469   //
 470   hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
 471   hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
 472   //
 473   Double_t ys = shift*TMath::Sin(openingAngle);
 474   Double_t xs = shift*TMath::Cos(openingAngle);
 475   TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
 476   tr->RegisterYourself();
 477   TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
 478   TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
 479   TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
 480   bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
 481   bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
 482   TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
 483   TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
 484   //
 485   ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
 486   //
 487   // readout chambers
 488   //
 489   // IROC first
 490   //
 491    TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
 492    TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
 493   // empty space
 494    TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
 495    TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
 496    ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
 497    //bars
 498    Double_t tga = (19.8328-12.3742)/39.3;
 499    Double_t xmin,xmax;
 500    xmin = 9.55*tga+12.3742;
 501    xmax = 9.95*tga+12.3742;
 502    TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
 503    TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
 504    empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
 505    xmin=19.4*tga+12.3742;
 506    xmax=19.9*tga+12.3742;
 507    TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
 508    TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
 509    empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
 510    xmin=29.35*tga+12.3742;
 511    xmax=29.75*tga+12.3742;
 512    TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
 513    TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
 514    empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
 515    //
 516    // holes for connectors
 517    //
 518    TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
 519    TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
 520    TString fileName(gSystem->Getenv("ALICE_ROOT"));
 521    fileName += "/TPC/conn_iroc.dat";
 522    ifstream in;
 523    in.open(fileName.Data(), ios_base::in); // asci file
 524    for(Int_t i =0;i<86;i++){
 525       Double_t y = 3.99;
 526       Double_t x,z,ang;
 527       in>>x>>z>>ang;
 528       z-=26.5;
 529       TGeoRotation *rrr = new TGeoRotation();
 530       rrr->RotateY(ang);
 531       TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
 532       ibdv->AddNode(connv,i+1,trans);
 533    }
 534    in.close();
 535    // "cap"
 536    new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
 537    // "hole"
 538    new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
 539    TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
 540    tr1->RegisterYourself();
 541    TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
 542    TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
 543    //
 544    // pad plane and wire fixations
 545    //
 546    TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
 547    TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
 548    TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
 549    TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
 550    TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
 551    TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
 552    TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
 553    //
 554    TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
 555    //
 556    iroc->AddNode(ibdv,1);
 557    iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
 558    iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
 559    tga =(23.3521-14.5974)/49.65;
 560    Double_t xx = 24.825*tga+14.5974-0.6;
 561    iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
 562    iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
 563    //
 564    // OROC
 565    //
 566    TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
 567    TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
 568    TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
 569    TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
 570    obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
 571    //horizontal bars
 572    tga=(38.5084-20.2938)/99.3;
 573    xmin=tga*10.2+20.2938;
 574    xmax=tga*10.6+20.2938;
 575    TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 576    TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
 577    //
 578    xmin=22.55*tga+20.2938;
 579    xmax=24.15*tga+20.2938;
 580    TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
 581    TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
 582    //
 583    xmin=36.1*tga+20.2938;
 584    xmax=36.5*tga+20.2938;
 585    TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 586    TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
 587    //
 588    xmin=49.0*tga+20.2938;
 589    xmax=50.6*tga+20.2938;
 590    TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
 591    TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
 592    //
 593    xmin=63.6*tga+20.2938;
 594    xmax=64.0*tga+20.2938;
 595    TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 596    TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
 597    //
 598    xmin=75.5*tga+20.2938;
 599    xmax=77.15*tga+20.2938;
 600    TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
 601    TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
 602    //
 603    xmin=88.7*tga+20.2938;
 604    xmax=89.1*tga+20.2938;
 605    TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 606    TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
 607    //
 608    oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
 609    oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
 610    oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
 611    oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
 612    oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
 613    oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
 614    oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
 615    // vertical bars
 616    TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
 617    TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
 618    TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
 619    TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
 620    TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
 621    //
 622    TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
 623    TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
 624    TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
 625    TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
 626    TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
 627    //
 628    oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
 629    oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
 630    oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
 631    oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
 632    oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
 633    oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
 634    oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
 635    oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
 636    //
 637    // holes for connectors
 638    //
 639    fileName = gSystem->Getenv("ALICE_ROOT");
 640    fileName += "/TPC/conn_oroc.dat";
 641    in.open(fileName.Data(), ios_base::in); // asci file
 642    for(Int_t i =0;i<78;i++){
 643       Double_t y =3.89;
 644       Double_t x,z,ang;
 645       Double_t x1,z1,x2,z2;
 646       in>>x>>z>>ang;
 647       Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
 648       Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
 649       //
 650       x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
 651       //
 652       TGeoRotation *rr = new TGeoRotation();
 653       rr->RotateY(ang);
 654       z1-=54.95;
 655       z2-=54.95;
 656       TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
 657       TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
 658       obdv->AddNode(connv,i+1,trans1);
 659       obdv->AddNode(connv,i+79,trans2);
 660    }
 661    in.close();
 662    // cap
 663    new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
 664    new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
 665    TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
 666    tr5->RegisterYourself();
 667    TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
 668    TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
 669    //
 670    // pad plane and wire fixations
 671    //
 672    TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
 673    TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
 674    //
 675    tga=(43.5239-23.3874)/114.2;
 676    TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
 677    TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
 678    xx = 57.1*tga+23.3874-0.7;
 679    TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
 680    TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
 681    //
 682    TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
 683    //
 684    oroc->AddNode(obdv,1);
 685    oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
 686    oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
 687    oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
 688    oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
 689    //
 690    // now iroc and oroc are placed into a sector...
 691    //
 692    TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
 693    TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
 694    TGeoRotation rot1("rot1",90.,90.,0.);
 695    TGeoRotation rot2("rot2");
 696    rot2.RotateY(10.);
 697    TGeoRotation *rot = new TGeoRotation("rot");
 698    *rot=rot1*rot2;
 699    //
 700    Double_t x0,y0;
 701    x0=110.2*TMath::Cos(openingAngle);
 702    y0=110.2*TMath::Sin(openingAngle);
 703    TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
 704    TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
 705    x0=188.45*TMath::Cos(openingAngle);
 706    y0=188.45*TMath::Sin(openingAngle);
 707    TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
 708    TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
 709    //
 710    // A-side
 711    //
 712    secta->AddNode(ch,1);
 713    secta->AddNode(iroc,1,combi1a);
 714    secta->AddNode(oroc,1,combi2a);
 715    //
 716    // C-side
 717    //
 718    sectc->AddNode(ch,1);
 719    sectc->AddNode(iroc,1,combi1c);
 720    sectc->AddNode(oroc,1,combi2c);
 721    //
 722    // now I try to make  wheels...
 723    //
 724    TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
 725    TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
 726    //
 727    for(Int_t i =0;i<18;i++){
 728      Double_t phi = (20.*i);
 729      TGeoRotation *r = new TGeoRotation();
 730      r->RotateZ(phi);
 731      wheela->AddNode(secta,i+1,r);
 732      wheelc->AddNode(sectc,i+1,r);
 733
 734    }
 735    // wheels in the drift volume!
 736    TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
 737    v9->AddNode(wheela,1,combi3);
 738    v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
 739
 740    //_____________________________________________________________
 741    // service support wheel
 742    //_____________________________________________________________
 743   TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
 744   sw->DefineSection(0,-4.,80.5,251.75);
 745   sw->DefineSection(1,4.,80.5,251.75);
 746   TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
 747   //
 748   thick=1.;
 749   shift = thick/TMath::Sin(openingAngle);
 750   TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
 751   sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
 752   sh->DefineSection(1,4.,81.5-shift,250.75-shift);
 753   TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
 754   //
 755   TGeoMedium *m9 =  gGeoManager->GetMedium("TPC_Si");
 756   TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
 757   el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
 758   el->DefineSection(1,1.872,81.5-shift,250.75-shift);
 759   TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
 760   //
 761   shv->AddNode(elv,1);
 762   //
 763   //
 764   ys = shift*TMath::Sin(openingAngle);
 765   xs = shift*TMath::Cos(openingAngle);
 766   swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
 767   // cover
 768   TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
 769   co->DefineSection(0,-0.5,77.,255.25);
 770   co->DefineSection(1,0.5,77.,255.25);
 771   TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
 772   // hole in a cover
 773   TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
 774   shift=4./TMath::Sin(openingAngle);
 775   coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
 776   coh->DefineSection(1,0.5,85.-shift,247.25-shift);
 777   //
 778   TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
 779   //
 780   ys = shift*TMath::Sin(openingAngle);
 781   xs = shift*TMath::Cos(openingAngle);
 782   cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
 783   //
 784   // Sector as an Assembly
 785   //
 786   TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
 787   swhs->AddNode(swv,1);
 788   swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
 789   swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
 790   //
 791   // SSW as an Assembly of sectors
 792   //
 793  TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
 794    for(Int_t i =0;i<18;i++){
 795      Double_t phi = (20.*i);
 796      TGeoRotation *r = new TGeoRotation();
 797      r->RotateZ(phi);
 798      swheel->AddNode(swhs,i+1,r);
 799    }
 800    v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
 801    v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
 802
 803    // sensitive strips
 804    TGeoMedium *m8 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
 805    Int_t totrows;
 806    totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
 807    Double_t *upar;
 808    upar=NULL;
 809    gGeoManager->Volume("TPC_Strip","PGON",m8->GetId(),upar);
 810    upar=new Double_t [10];
 811    upar[0]=0.;
 812    upar[1]=360.;
 813    upar[2]=18.;
 814    upar[3]=2.;
 815    //
 816    upar[4]=-124.8;
 817    upar[7]=124.8;
 818
 819    Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
 820
 821    upar[5]=rlow;
 822    upar[6]=rlow+.01;
 823    upar[8]=upar[5];
 824    upar[9]=upar[6];
 825    //
 826    gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
 827    gGeoManager->Node("TPC_Strip",totrows+1,
 828                      "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
 829    //
 830    // now, strips
 831    //
 832      //lower sectors
 833      for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
 834        rlow=fTPCParam->GetPadRowRadiiLow(i-1);
 835        upar[5]=rlow;
 836        upar[6]=rlow+.01;
 837        upar[8]=upar[5];
 838        upar[9]=upar[6];
 839        gGeoManager->Node("TPC_Strip",i,
 840                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
 841        gGeoManager->Node("TPC_Strip",totrows+i,
 842                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
 843      }
 844      //upper sectors
 845      for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
 846        rlow=fTPCParam->GetPadRowRadiiUp(i-1);
 847        upar[5]=rlow;
 848        upar[6]=rlow+.01;
 849        upar[8]=upar[5];
 850        upar[9]=upar[6];
 851        gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
 852                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
 853        gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
 854                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
 855      }
 856
 857   //----------------------------------------------------------
 858   // TPc Support Rods - MAKROLON
 859   //----------------------------------------------------------
 860   TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
 861   TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
 862   // upper and lower rods differ in length!
 863   delete [] upar;
 864   upar=NULL;
 865   gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
 866   upar=new Double_t [3];
 867   upar[0]=1.8;
 868   upar[1]=2.2;
 869
 870   //
 871   //HV rods - makrolon + 0.58cm (diameter) Cu
 872   TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
 873   TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
 874   //
 875   TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
 876   TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
 877   hvrv->AddNode(hvcv,1);
 878
 879   for(Int_t i=0;i<18;i++){
 880     Double_t angle,x,y;
 881     Double_t z,r;
 882     angle=TMath::DegToRad()*20.*(Double_t)i;
 883     r=81.5;
 884     x=r * TMath::Cos(angle);
 885     y=r * TMath::Sin(angle);
 886     upar[2]=126.64; //lower
 887     z= 126.96;
 888     if(i==15){
 889       v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
 890       v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
 891     }
 892     else{
 893      gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
 894      gGeoManager->Node("TPC_Rod",i+18,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
 895     }
 896     r=254.25;
 897     x=r * TMath::Cos(angle);
 898     y=r * TMath::Sin(angle);
 899     upar[2]=126.54; //upper
 900     z=127.06;
 901     gGeoManager->Node("TPC_Rod",i+36,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
 902     gGeoManager->Node("TPC_Rod",i+54,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
 903   }
 904
 905   TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
 906   alice->AddNode(v1,1);
 907
 908 } // end of function
 909
 910 //_____________________________________________________________________________
 911 void AliTPCv1::DrawDetector()
 912 {
 913   //
 914   // Draw a shaded view of the Time Projection Chamber version 1
 915   //
 916
 917   // Set everything unseen
 918   gMC->Gsatt("*", "seen", -1);
 919   //
 920   // Set ALIC mother transparent
 921   gMC->Gsatt("ALIC","SEEN",0);
 922   //
 923   // Set the volumes visible
 924   gMC->Gsatt("TPC ","SEEN",0);
 925   gMC->Gsatt("TOIN","SEEN",1);
 926   gMC->Gsatt("TOIN","COLO",7);
 927   gMC->Gsatt("TOCV","SEEN",1);
 928   gMC->Gsatt("TOCV","COLO",4);
 929   gMC->Gsatt("TSA1","SEEN",0);
 930   gMC->Gsatt("TSA2","SEEN",0);
 931   gMC->Gsatt("TSA3","SEEN",0);
 932   gMC->Gsatt("TSA4","SEEN",0);
 933   gMC->Gsatt("TSA5","SEEN",0);
 934   gMC->Gsatt("TOFC","SEEN",1);
 935   gMC->Gsatt("TOFC","COLO",4);
 936   gMC->Gsatt("TSA6","SEEN",0);
 937   gMC->Gsatt("TSA7","SEEN",0);
 938   gMC->Gsatt("TSA8","SEEN",0);
 939   gMC->Gsatt("TIIN","SEEN",1);
 940   gMC->Gsatt("TIIN","COLO",7);
 941   gMC->Gsatt("TII1","SEEN",0);
 942   gMC->Gsatt("TIFC","SEEN",1);
 943   gMC->Gsatt("TIFC","COLO",4);
 944   gMC->Gsatt("TSA9","SEEN",0);
 945   gMC->Gsatt("TS10","SEEN",0);
 946   gMC->Gsatt("TS11","SEEN",0);
 947   gMC->Gsatt("TS12","SEEN",0);
 948   gMC->Gsatt("TS13","SEEN",0);
 949   gMC->Gsatt("TS14","SEEN",0);
 950   gMC->Gsatt("TICC","SEEN",0);
 951   gMC->Gsatt("TICM","SEEN",0);
 952   gMC->Gsatt("TS15","SEEN",0);
 953   gMC->Gsatt("TS16","SEEN",0);
 954   gMC->Gsatt("TS17","SEEN",0);
 955   gMC->Gsatt("TS18","SEEN",0);
 956   gMC->Gsatt("TS19","SEEN",0);
 957   gMC->Gsatt("TPJ1","SEEN",0);
 958   gMC->Gsatt("TPJ2","SEEN",0);
 959   gMC->Gsatt("TICS","SEEN",0);
 960   gMC->Gsatt("TDGN","SEEN",0);
 961   gMC->Gsatt("TIRC","SEEN",0);
 962   gMC->Gsatt("TIC1","SEEN",1);
 963   gMC->Gsatt("TIPP","SEEN",0);
 964   gMC->Gsatt("TIC3","SEEN",0);
 965   gMC->Gsatt("TRCE","SEEN",0);
 966   gMC->Gsatt("TPSC","SEEN",0);
 967   gMC->Gsatt("TPCC","SEEN",0);
 968   gMC->Gsatt("TORC","SEEN",0);
 969   gMC->Gsatt("TOPP","SEEN",0);
 970   gMC->Gsatt("TOC3","SEEN",0);
 971   gMC->Gsatt("TOC1","SEEN",1);
 972   gMC->Gsatt("TSSW","SEEN",1);
 973   gMC->Gsatt("TSWC","SEEN",1);
 974   gMC->Gsatt("TSSW","COLO",3);
 975   gMC->Gsatt("TSWC","COLO",3);
 976   gMC->Gsatt("TSCE","COLO",6);
 977   gMC->Gsatt("TSCE","SEEN",1);
 978   gMC->Gsatt("TWES","SEEN",0);
 979   gMC->Gsatt("TSWB","SEEN",0);
 980   gMC->Gsatt("TPEL","SEEN",0);
 981   gMC->Gsatt("TPMW","SEEN",1);
 982   gMC->Gsatt("TESR","SEEN",1);
 983   gMC->Gsatt("TPMW","COLO",12);
 984   gMC->Gsatt("TIC1","COLO",5);
 985   gMC->Gsatt("TOC1","COLO",5);
 986   gMC->Gsatt("TESB","SEEN",0);
 987   gMC->Gsatt("THVM","SEEN",1);
 988   gMC->Gsatt("THVM","COLO",11);
 989   gMC->Gsatt("THVH","SEEN",0);
 990   gMC->Gsatt("TPSR","SEEN",0);
 991   gMC->Gsatt("THVL","SEEN",0);
 992   gMC->Gsatt("THVC","SEEN",0);
 993   gMC->Gsatt("THVE","SEEN",0);
 994   gMC->Gsatt("THVR","SEEN",0);
 995   gMC->Gsatt("TPSS","SEEN",0);
 996   gMC->Gsatt("TPUS","SEEN",0);
 997   gMC->Gsatt("TPLS","SEEN",0);
 998
 999   //
1000   gMC->Gdopt("hide", "on");
1001   gMC->Gdopt("shad", "on");
1002   gMC->Gsatt("*", "fill", 7);
1003   gMC->SetClipBox(".");
1004   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1005   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1006   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1007   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1008   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1009   gMC->DefaultRange();
1010   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1011   gMC->Gdhead(1111, "Time Projection Chamber");
1012   gMC->Gdman(18, 4, "MAN");
1013   gMC->Gdopt("hide","off");
1014 }
1015
1016 //_____________________________________________________________________________
1017 void AliTPCv1::CreateMaterials()
1018 {
1019   //
1020   // Define materials for Time Projection Chamber
1021   //
1022   AliTPC::CreateMaterials();
1023 }
1024
1025 //_____________________________________________________________________________
1026 void AliTPCv1::Init()
1027 {
1028   //
1029   // Initialises TPC detector after it has been created
1030   //
1031
1032   fIdSens=gMC->VolId("TPC_Strip"); // sensitive strip
1033
1034   printf("%s: *** TPC version 1 initialized***\n",ClassName());
1035
1036   // printf("TPC version 1 initialized\n");
1037 }
1038
1039 //_____________________________________________________________________________
1040 void AliTPCv1::StepManager()
1041 {
1042   //
1043   // Called at every step in the Time Projection Chamber
1044   //
1045   Int_t         copy, id, i;
1046   Float_t       hits[5];
1047   Int_t         vol[2];
1048   TLorentzVector p;
1049  //
1050
1051   id = gMC->CurrentVolID(copy);
1052   if(id!=fIdSens) return;
1053   if(gMC->TrackCharge() && gMC->IsTrackEntering()) {
1054
1055     //
1056     // Only charged tracks entering the sensitive volume
1057     //
1058
1059       gMC->TrackPosition(p);
1060   Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1061   //
1062
1063   //
1064   Double_t angle = TMath::ACos(p[0]/r);
1065   angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1066   //
1067   // angular segment, it is not a real sector number...
1068   //
1069   Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1070                fTPCParam->GetInnerAngle());
1071   // rotate to segment "0"
1072   Float_t cos,sin;
1073   fTPCParam->AdjustCosSin(sector,cos,sin);
1074   Float_t x1 = p[0]*cos + p[1]*sin;
1075   Float_t y1 = TMath::Abs(-p[0]*sin + p[1]*cos);
1076   // calculate real sector number...
1077   if (x1>fTPCParam->GetOuterRadiusLow()){
1078     sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1079              fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1080     if (p[2]<0)         sector+=(fTPCParam->GetNOuterSector()>>1);
1081   }
1082     else
1083       if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1084   //
1085   // here I have a sector number
1086   //
1087   vol[0]=sector;
1088   //
1089   Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1090   vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1091   // row numbers are autonomous for lower and upper sectors
1092   if(vol[0] > fTPCParam->GetNInnerSector()) {
1093      vol[1] -= fTPCParam->GetNRowLow();
1094   }
1095   Double_t range = (sector<36) ? fTPCParam->GetYInner(vol[1]) :
1096                    fTPCParam->GetYOuter(vol[1]);
1097   if(y1>range) return;
1098      if(vol[1] == 0){
1099
1100         // because Jouri wants to have this
1101
1102         gMC->TrackMomentum(p);
1103         hits[0]=p[0];
1104         hits[1]=p[1];
1105         hits[2]=p[2];
1106         hits[3]=0.; // this hit has no energy loss
1107         // Get also the track time for pileup simulation
1108         hits[4]=gMC->TrackTime();
1109
1110         AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); // M.I.
1111      }
1112    gMC->TrackPosition(p);
1113       for(i=0;i<3;++i) hits[i]=p[i];
1114       hits[3]=1; //I'd like to have something positive here (I.Belikov)
1115       // Get also the track time for pileup simulation
1116       hits[4]=gMC->TrackTime();
1117
1118       AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); // M.I.
1119
1120   }// track entering sensitive strip
1121
1122 }
1123 //_____________________________________________________________________________
1124
1125
1126