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.,20); //20 sections
 120   //
 121   tpc->DefineSection(0,-291.,77.,278.);
 122   tpc->DefineSection(1,-270,77.,278.);
 123   //
 124   tpc->DefineSection(2,-270.,77.,278.);
 125   tpc->DefineSection(3,-259.6,70.,278.);
 126   //
 127   tpc->DefineSection(4,-259.6,68.1,278.);
 128   tpc->DefineSection(5,-253.6,68.1,278.);
 129   //
 130   tpc->DefineSection(6,-253.6,68.,278.);
 131   tpc->DefineSection(7,-74.0,60.8,278.);
 132   //
 133   tpc->DefineSection(8,-74.0,60.1,278.);
 134   tpc->DefineSection(9,-73.3,60.1,278.);
 135   //
 136   tpc->DefineSection(10,-73.3,56.9,278.);
 137   tpc->DefineSection(11,73.3,56.9,278.);
 138   //
 139   tpc->DefineSection(12,73.3,60.1,278.);
 140   tpc->DefineSection(13,74.0,60.1,278.);
 141   //
 142   tpc->DefineSection(14,74.0,60.8,278.);
 143   tpc->DefineSection(15,253.6,65.5,278.);
 144   //
 145   tpc->DefineSection(16,253.6,65.6,278.);
 146   tpc->DefineSection(17,259.6,65.6,278.);
 147   //
 148   tpc->DefineSection(18,259.6,70.0,278.);
 149   tpc->DefineSection(19,291.,77.,278.);
 150   //
 151   TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
 152   TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
 153   //
 154   // drift volume - sensitive volume, extended beyond the
 155   // endcaps, because of the alignment
 156   //
 157   TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
 158   dvol->DefineSection(0,-260.,74.5,264.4);
 159   dvol->DefineSection(1,-253.6,74.5,264.4);
 160   //
 161   dvol->DefineSection(2,-253.6,76.6774,258.);
 162   dvol->DefineSection(3,253.6,76.6774,258.);
 163   //
 164   dvol->DefineSection(4,253.6,74.5,264.4);
 165   dvol->DefineSection(5,260.,74.5,264.4);
 166   //
 167   TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-1");
 168   TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
 169   //
 170   //
 171   v1->AddNode(v9,1);
 172   //
 173   // outer insulator
 174   //
 175   TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
 176   //
 177   tpco->DefineSection(0,-256.6,264.8,278.);
 178   tpco->DefineSection(1,-253.6,264.8,278.);
 179   //
 180   tpco->DefineSection(2,-253.6,258.,278.);
 181   tpco->DefineSection(3,250.6,258.,278.);
 182   //
 183   tpco->DefineSection(4,250.6,258.,275.5);
 184   tpco->DefineSection(5,253.6,258.,275.5);
 185   //
 186   TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
 187   TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
 188   //
 189   // outer containment vessel
 190   //
 191   TGeoPcon *tocv = new TGeoPcon(0.,360.,6);  // containment vessel
 192   //
 193   tocv->DefineSection(0,-256.6,264.8,278.);
 194   tocv->DefineSection(1,-253.6,264.8,278.);
 195   //
 196   tocv->DefineSection(2,-253.6,274.8124,278.);
 197   tocv->DefineSection(3,247.6,274.8124,278.);
 198   //
 199   tocv->DefineSection(4,247.6,270.4,278.);
 200   tocv->DefineSection(5,250.6,270.4,278.);
 201   //
 202   TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
 203   TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3);
 204   //
 205   TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
 206   TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
 207   TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
 208   TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
 209   //
 210   TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
 211   TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
 212   TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
 213   TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
 214   //
 215   TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
 216   TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
 217   TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
 218   TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
 219
 220   //-------------------------------------------------------
 221   //  Tpc Outer Field Cage
 222   //  daughters - composite (sandwich)
 223   //-------------------------------------------------------
 224
 225   TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
 226   //
 227   tofc->DefineSection(0,-253.6,258.,269.6);
 228   tofc->DefineSection(1,-250.6,258.,269.6);
 229   //
 230   tofc->DefineSection(2,-250.6,258.,260.0676);
 231   tofc->DefineSection(3,250.6,258.,260.0676);
 232   //
 233   tofc->DefineSection(4,250.6,258.,275.5);
 234   tofc->DefineSection(5,253.6,258.,275.5);
 235   //
 236   TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3);
 237   //sandwich
 238   TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
 239   TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
 240   TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
 241   //
 242   TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
 243   //
 244   TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
 245   TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
 246   TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
 247   //
 248   // outer part - positioning
 249   //
 250   tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
 251   //
 252   tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
 253   //
 254   v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
 255   //
 256   v2->AddNode(v3,1); v2->AddNode(v4,1);
 257   //
 258   v1->AddNode(v2,1);
 259   //--------------------------------------------------------------------
 260   // Tpc Inner INsulator (CO2)
 261   // the cones, the central drum and the inner f.c. sandwich with a piece
 262   // of the flane will be placed in the TPC
 263   //--------------------------------------------------------------------
 264   TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
 265   //
 266   tpci->DefineSection(0,-253.6,68.4,76.6774);
 267   tpci->DefineSection(1,-74.0,61.2,76.6774);
 268   //
 269   tpci->DefineSection(2,74.0,61.2,76.6774);
 270   //
 271   tpci->DefineSection(3,253.6,65.9,76.6774);
 272   //
 273   TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
 274   //
 275   // now the inner field cage - only part of flanges (2 copies)
 276   //
 277   TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5);
 278   TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
 279   //
 280  //---------------------------------------------------------
 281   // Tpc Inner Containment vessel - Muon side
 282   //---------------------------------------------------------
 283   TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
 284   //
 285   tcms->DefineSection(0,-259.1,68.1,74.2);
 286   tcms->DefineSection(1,-253.6,68.1,74.2);
 287   //
 288   tcms->DefineSection(2,-253.6,68.1,68.4);
 289   tcms->DefineSection(3,-74.0,60.9,61.2);
 290   //
 291   tcms->DefineSection(4,-74.0,60.1,61.2);
 292   tcms->DefineSection(5,-73.3,60.1,61.2);
 293   //
 294   tcms->DefineSection(6,-73.3,56.9,61.2);
 295   tcms->DefineSection(7,-73.0,56.9,61.2);
 296   //
 297   tcms->DefineSection(8,-73.0,56.9,58.8);
 298   tcms->DefineSection(9,-71.3,56.9,58.8);
 299   //
 300   TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
 301   //-----------------------------------------------
 302   // inner containment vessel - shaft side
 303   //-----------------------------------------------
 304   TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
 305   //
 306   tcss->DefineSection(0,71.3,56.9,58.8);
 307   tcss->DefineSection(1,73.0,56.9,58.8);
 308   //
 309   tcss->DefineSection(2,73.0,56.9,61.2);
 310   tcss->DefineSection(3,73.3,56.9,61.2);
 311   //
 312   tcss->DefineSection(4,73.3,60.1,61.2);
 313   tcss->DefineSection(5,74.0,60.1,61.2);
 314   //
 315   tcss->DefineSection(6,74.0,60.9,61.2);
 316   tcss->DefineSection(7,253.6,65.6,65.9);
 317   //
 318   tcss->DefineSection(8,253.6,65.6,74.2);
 319   tcss->DefineSection(9,258.1,65.6,74.2);
 320   //
 321   TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
 322   //-----------------------------------------------
 323   //  Inner field cage
 324   //  define 4 parts and make an assembly
 325   //-----------------------------------------------
 326   // part1 - Al - 2 copies
 327   TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
 328   TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
 329   // sandwich - outermost parts - 2 copies
 330   TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
 331   TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
 332   TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
 333   TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
 334   //
 335   TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
 336   TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
 337   TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
 338   TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
 339   //
 340   // middle parts - 2 copies
 341   TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
 342   TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
 343   TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
 344   TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
 345   //
 346   TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
 347   TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
 348   TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
 349   TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
 350   // central part - 1 copy
 351   TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns
 352   TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
 353   TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
 354   //
 355   TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
 356   TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
 357   TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
 358   //
 359   // inner part - positioning
 360   //
 361   // creating a sandwich
 362   tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
 363   //
 364   tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
 365   //
 366   tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
 367   //
 368   TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
 369   //
 370   tv100->AddNode(tv10,1);
 371   tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
 372   tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
 373   tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
 374   tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
 375   tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
 376   tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
 377   //
 378   v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
 379   v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
 380   v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1);
 381   v9->AddNode(tv100,1);
 382   //
 383   // central drum
 384   //
 385   // flange + sandwich
 386   //
 387   TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
 388   cfl->DefineSection(0,-71.1,59.7,61.2);
 389   cfl->DefineSection(1,-68.6,59.7,61.2);
 390   //
 391   cfl->DefineSection(2,-68.6,60.6324,61.2);
 392   cfl->DefineSection(3,68.6,60.6324,61.2);
 393   //
 394   cfl->DefineSection(4,68.6,59.7,61.2);
 395   cfl->DefineSection(5,71.1,59.7,61.2);
 396   //
 397   TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
 398   // sandwich
 399   TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
 400   TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
 401   TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);
 402   //
 403   TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
 404   TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
 405   TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
 406   TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
 407   //
 408   // seals for central drum 2 copies
 409   //
 410   TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
 411   TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
 412   TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
 413   v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
 414   v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
 415   //
 416   // seal collars
 417   TGeoPcon *se = new TGeoPcon(0.,360.,6);
 418   se->DefineSection(0,-72.8,59.7,61.2);
 419   se->DefineSection(1,-72.3,59.7,61.2);
 420   //
 421   se->DefineSection(2,-72.3,58.85,61.2);
 422   se->DefineSection(3,-71.6,58.85,61.2);
 423   //
 424   se->DefineSection(4,-71.6,59.7,61.2);
 425   se->DefineSection(5,-71.3,59.7,61.2);
 426   //
 427   TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
 428   //
 429   TGeoTube *si = new TGeoTube(56.9,58.8,1.);
 430   TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
 431   //
 432   // define reflection matrix
 433   //
 434   TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
 435   //
 436   cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
 437   //
 438   v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
 439   v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
 440   v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
 441   //
 442   // central membrane - 2 rings and a mylar membrane - assembly
 443   //
 444   TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
 445   TGeoTube *oh = new TGeoTube(250.,256.,.5);
 446   TGeoTube *mem = new TGeoTube(84.05,250,0.01);
 447   TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
 448   TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
 449   TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
 450   //
 451   TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
 452   cm->AddNode(ihv,1);
 453   cm->AddNode(ohv,1);
 454   cm->AddNode(memv,1);
 455   v9->AddNode(cm,1);
 456   //
 457   // end caps - they are make as an assembly of single segments
 458   // containing both readout chambers
 459   //
 460   Double_t openingAngle = 10.*TMath::DegToRad();
 461   Double_t thick=1.5; // rib
 462   Double_t shift = thick/TMath::Sin(openingAngle);
 463   //
 464   Double_t lowEdge = 86.3; // hole in the wheel
 465   Double_t upEdge = 240.4; // hole in the wheel
 466   //
 467   new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
 468   //
 469   TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
 470   //
 471   hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
 472   hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
 473   //
 474   hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
 475   hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
 476   //
 477   Double_t ys = shift*TMath::Sin(openingAngle);
 478   Double_t xs = shift*TMath::Cos(openingAngle);
 479   TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);
 480   tr->RegisterYourself();
 481   TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
 482   TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
 483   TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
 484   bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
 485   bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
 486   TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
 487   TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
 488   //
 489   ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
 490   //
 491   // readout chambers
 492   //
 493   // IROC first
 494   //
 495    TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
 496    TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
 497   // empty space
 498    TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
 499    TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
 500    ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
 501    //bars
 502    Double_t tga = (19.8328-12.3742)/39.3;
 503    Double_t xmin,xmax;
 504    xmin = 9.55*tga+12.3742;
 505    xmax = 9.95*tga+12.3742;
 506    TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
 507    TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
 508    empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
 509    xmin=19.4*tga+12.3742;
 510    xmax=19.9*tga+12.3742;
 511    TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
 512    TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
 513    empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
 514    xmin=29.35*tga+12.3742;
 515    xmax=29.75*tga+12.3742;
 516    TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2);
 517    TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);
 518    empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
 519    //
 520    // holes for connectors
 521    //
 522    TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
 523    TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
 524    TString fileName(gSystem->Getenv("ALICE_ROOT"));
 525    fileName += "/TPC/conn_iroc.dat";
 526    ifstream in;
 527    in.open(fileName.Data(), ios_base::in); // asci file
 528    for(Int_t i =0;i<86;i++){
 529       Double_t y = 3.99;
 530       Double_t x,z,ang;
 531       in>>x>>z>>ang;
 532       z-=26.5;
 533       TGeoRotation *rrr = new TGeoRotation();
 534       rrr->RotateY(ang);
 535       TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
 536       ibdv->AddNode(connv,i+1,trans);
 537    }
 538    in.close();
 539    // "cap"
 540    new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
 541    // "hole"
 542    new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
 543    TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);
 544    tr1->RegisterYourself();
 545    TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
 546    TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
 547    //
 548    // pad plane and wire fixations
 549    //
 550    TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
 551    TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
 552    TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
 553    TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
 554    TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
 555    TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
 556    TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
 557    //
 558    TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
 559    //
 560    iroc->AddNode(ibdv,1);
 561    iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
 562    iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
 563    tga =(23.3521-14.5974)/49.65;
 564    Double_t xx = 24.825*tga+14.5974-0.6;
 565    iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
 566    iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
 567    //
 568    // OROC
 569    //
 570    TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
 571    TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
 572    TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
 573    TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
 574    obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
 575    //horizontal bars
 576    tga=(38.5084-20.2938)/99.3;
 577    xmin=tga*10.2+20.2938;
 578    xmax=tga*10.6+20.2938;
 579    TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 580    TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
 581    //
 582    xmin=22.55*tga+20.2938;
 583    xmax=24.15*tga+20.2938;
 584    TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
 585    TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
 586    //
 587    xmin=36.1*tga+20.2938;
 588    xmax=36.5*tga+20.2938;
 589    TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 590    TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
 591    //
 592    xmin=49.0*tga+20.2938;
 593    xmax=50.6*tga+20.2938;
 594    TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
 595    TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
 596    //
 597    xmin=63.6*tga+20.2938;
 598    xmax=64.0*tga+20.2938;
 599    TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 600    TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
 601    //
 602    xmin=75.5*tga+20.2938;
 603    xmax=77.15*tga+20.2938;
 604    TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
 605    TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
 606    //
 607    xmin=88.7*tga+20.2938;
 608    xmax=89.1*tga+20.2938;
 609    TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
 610    TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
 611    //
 612    oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
 613    oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
 614    oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
 615    oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
 616    oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
 617    oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
 618    oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
 619    // vertical bars
 620    TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1);
 621    TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
 622    TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
 623    TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
 624    TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
 625    //
 626    TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
 627    TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
 628    TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
 629    TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
 630    TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
 631    //
 632    oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
 633    oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
 634    oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
 635    oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
 636    oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
 637    oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
 638    oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
 639    oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
 640    //
 641    // holes for connectors
 642    //
 643    fileName = gSystem->Getenv("ALICE_ROOT");
 644    fileName += "/TPC/conn_oroc.dat";
 645    in.open(fileName.Data(), ios_base::in); // asci file
 646    for(Int_t i =0;i<78;i++){
 647       Double_t y =3.89;
 648       Double_t x,z,ang;
 649       Double_t x1,z1,x2,z2;
 650       in>>x>>z>>ang;
 651       Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
 652       Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
 653       //
 654       x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;
 655       //
 656       TGeoRotation *rr = new TGeoRotation();
 657       rr->RotateY(ang);
 658       z1-=54.95;
 659       z2-=54.95;
 660       TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
 661       TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
 662       obdv->AddNode(connv,i+1,trans1);
 663       obdv->AddNode(connv,i+79,trans2);
 664    }
 665    in.close();
 666    // cap
 667    new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
 668    new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
 669    TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
 670    tr5->RegisterYourself();
 671    TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
 672    TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
 673    //
 674    // pad plane and wire fixations
 675    //
 676    TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
 677    TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
 678    //
 679    tga=(43.5239-23.3874)/114.2;
 680    TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
 681    TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);
 682    xx = 57.1*tga+23.3874-0.7;
 683    TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
 684    TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
 685    //
 686    TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
 687    //
 688    oroc->AddNode(obdv,1);
 689    oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
 690    oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
 691    oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
 692    oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
 693    //
 694    // now iroc and oroc are placed into a sector...
 695    //
 696    TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
 697    TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
 698    TGeoRotation rot1("rot1",90.,90.,0.);
 699    TGeoRotation rot2("rot2");
 700    rot2.RotateY(10.);
 701    TGeoRotation *rot = new TGeoRotation("rot");
 702    *rot=rot1*rot2;
 703    //
 704    Double_t x0,y0;
 705    x0=110.2*TMath::Cos(openingAngle);
 706    y0=110.2*TMath::Sin(openingAngle);
 707    TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side
 708    TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
 709    x0=188.45*TMath::Cos(openingAngle);
 710    y0=188.45*TMath::Sin(openingAngle);
 711    TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
 712    TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
 713    //
 714    // A-side
 715    //
 716    secta->AddNode(ch,1);
 717    secta->AddNode(iroc,1,combi1a);
 718    secta->AddNode(oroc,1,combi2a);
 719    //
 720    // C-side
 721    //
 722    sectc->AddNode(ch,1);
 723    sectc->AddNode(iroc,1,combi1c);
 724    sectc->AddNode(oroc,1,combi2c);
 725    //
 726    // now I try to make  wheels...
 727    //
 728    TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
 729    TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
 730    //
 731    for(Int_t i =0;i<18;i++){
 732      Double_t phi = (20.*i);
 733      TGeoRotation *r = new TGeoRotation();
 734      r->RotateZ(phi);
 735      wheela->AddNode(secta,i+1,r);
 736      wheelc->AddNode(sectc,i+1,r);
 737
 738    }
 739    // wheels in the drift volume!
 740    TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
 741    v9->AddNode(wheela,1,combi3);
 742    v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
 743
 744    //_____________________________________________________________
 745    // service support wheel
 746    //_____________________________________________________________
 747   TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
 748   sw->DefineSection(0,-4.,80.5,251.75);
 749   sw->DefineSection(1,4.,80.5,251.75);
 750   TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
 751   //
 752   thick=1.;
 753   shift = thick/TMath::Sin(openingAngle);
 754   TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
 755   sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
 756   sh->DefineSection(1,4.,81.5-shift,250.75-shift);
 757   TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
 758   //
 759   TGeoMedium *m9 =  gGeoManager->GetMedium("TPC_Si");
 760   TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
 761   el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
 762   el->DefineSection(1,1.872,81.5-shift,250.75-shift);
 763   TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si
 764   //
 765   shv->AddNode(elv,1);
 766   //
 767   //
 768   ys = shift*TMath::Sin(openingAngle);
 769   xs = shift*TMath::Cos(openingAngle);
 770   swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
 771   // cover
 772   TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
 773   co->DefineSection(0,-0.5,77.,255.25);
 774   co->DefineSection(1,0.5,77.,255.25);
 775   TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
 776   // hole in a cover
 777   TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
 778   shift=4./TMath::Sin(openingAngle);
 779   coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
 780   coh->DefineSection(1,0.5,85.-shift,247.25-shift);
 781   //
 782   TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
 783   //
 784   ys = shift*TMath::Sin(openingAngle);
 785   xs = shift*TMath::Cos(openingAngle);
 786   cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
 787   //
 788   // Sector as an Assembly
 789   //
 790   TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
 791   swhs->AddNode(swv,1);
 792   swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
 793   swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
 794   //
 795   // SSW as an Assembly of sectors
 796   //
 797  TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
 798    for(Int_t i =0;i<18;i++){
 799      Double_t phi = (20.*i);
 800      TGeoRotation *r = new TGeoRotation();
 801      r->RotateZ(phi);
 802      swheel->AddNode(swhs,i+1,r);
 803    }
 804    v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
 805    v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
 806
 807    // sensitive strips
 808    TGeoMedium *m8 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
 809    Int_t totrows;
 810    totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
 811    Double_t *upar;
 812    upar=NULL;
 813    gGeoManager->Volume("TPC_Strip","PGON",m8->GetId(),upar);
 814    upar=new Double_t [10];
 815    upar[0]=0.;
 816    upar[1]=360.;
 817    upar[2]=18.;
 818    upar[3]=2.;
 819    //
 820    upar[4]=-124.8;
 821    upar[7]=124.8;
 822
 823    Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
 824
 825    upar[5]=rlow;
 826    upar[6]=rlow+.01;
 827    upar[8]=upar[5];
 828    upar[9]=upar[6];
 829    //
 830    gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
 831    gGeoManager->Node("TPC_Strip",totrows+1,
 832                      "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
 833    //
 834    // now, strips
 835    //
 836      //lower sectors
 837      for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
 838        rlow=fTPCParam->GetPadRowRadiiLow(i-1);
 839        upar[5]=rlow;
 840        upar[6]=rlow+.01;
 841        upar[8]=upar[5];
 842        upar[9]=upar[6];
 843        gGeoManager->Node("TPC_Strip",i,
 844                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
 845        gGeoManager->Node("TPC_Strip",totrows+i,
 846                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
 847      }
 848      //upper sectors
 849      for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
 850        rlow=fTPCParam->GetPadRowRadiiUp(i-1);
 851        upar[5]=rlow;
 852        upar[6]=rlow+.01;
 853        upar[8]=upar[5];
 854        upar[9]=upar[6];
 855        gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
 856                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
 857        gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
 858                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
 859      }
 860
 861   //----------------------------------------------------------
 862   // TPc Support Rods - MAKROLON
 863   //----------------------------------------------------------
 864   TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
 865   TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
 866   TGeoMedium *m10 =  gGeoManager->GetMedium("TPC_Alumina");
 867   TGeoMedium *m11 =  gGeoManager->GetMedium("TPC_Peek");
 868   TGeoMedium *m12 =  gGeoManager->GetMedium("TPC_Water");
 869   // upper and lower rods differ in length!
 870   delete [] upar;
 871   upar=NULL;
 872   gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
 873   upar=new Double_t [3];
 874   upar[0]=1.8;
 875   upar[1]=2.2;
 876
 877   //
 878   //HV rods - makrolon + 0.58cm (diameter) Cu
 879   TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
 880   TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
 881   //
 882   TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
 883   TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
 884   hvrv->AddNode(hvcv,1);
 885   //
 886   // resistor rods
 887   //
 888   TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner
 889   TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer
 890   TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
 891   TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
 892   //
 893   TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
 894   TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);
 895   TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
 896   TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);
 897   //
 898   // ceramic rod with water
 899   //
 900   criv->AddNode(cwiv,1);
 901   crov->AddNode(cwov,1);
 902   //
 903   TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner
 904   TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer
 905   //
 906   // peek rod
 907   //
 908   TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
 909   TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12);
 910   //
 911   // resistor rods assembly
 912   //
 913    TGeoRotation *rotr = new TGeoRotation("rotr");
 914    rotr->RotateZ(-21.);
 915   //
 916   TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
 917   TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
 918   //
 919   TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
 920   TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);
 921   //
 922   //
 923   TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
 924   TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
 925   rrin->AddNode(rriv,1);
 926   rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
 927   rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.));
 928   rrin->AddNode(priv,1);
 929   //
 930   rrou->AddNode(rrov,1);
 931   rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
 932   rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.));
 933   rrou->AddNode(prov,1);
 934   for(Int_t i=0;i<18;i++){
 935     Double_t angle,x,y;
 936     Double_t z,r;
 937     angle=TMath::DegToRad()*20.*(Double_t)i;
 938     r=81.5;
 939     x=r * TMath::Cos(angle);
 940     y=r * TMath::Sin(angle);
 941     upar[2]=126.64; //lower
 942     z= 126.96;
 943     if(i==3){
 944       v9->AddNode(rrin,1,new TGeoCombiTrans(x,y,z,rotr)); //A
 945       v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
 946     }
 947     else {
 948       gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
 949       gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
 950     }
 951
 952     //
 953     r=254.25;
 954     x=r * TMath::Cos(angle);
 955     y=r * TMath::Sin(angle);
 956     upar[2]=126.54; //upper
 957     z=127.06;
 958     //
 959     if(i==15){
 960       //v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
 961      v9->AddNode(hvrv,1,new TGeoTranslation(x,y,127.14));//A-side only
 962       gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
 963     }
 964     else if(i==11){
 965       v9->AddNode(rrou,1,new TGeoCombiTrans(x,y,z,rotr)); //A
 966       v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
 967     }
 968     else{
 969     //
 970       gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
 971       gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
 972     }
 973     gGeoManager->Node("TPC_Rod",i+36,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
 974     gGeoManager->Node("TPC_Rod",i+54,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
 975   }
 976
 977   TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
 978   alice->AddNode(v1,1);
 979
 980 } // end of function
 981
 982 //_____________________________________________________________________________
 983 void AliTPCv1::DrawDetector() const
 984 {
 985   //
 986   // Draw a shaded view of the Time Projection Chamber version 1
 987   //
 988
 989   // Set everything unseen
 990   gMC->Gsatt("*", "seen", -1);
 991   //
 992   // Set ALIC mother transparent
 993   gMC->Gsatt("ALIC","SEEN",0);
 994   //
 995   // Set the volumes visible
 996   gMC->Gsatt("TPC ","SEEN",0);
 997   gMC->Gsatt("TOIN","SEEN",1);
 998   gMC->Gsatt("TOIN","COLO",7);
 999   gMC->Gsatt("TOCV","SEEN",1);
1000   gMC->Gsatt("TOCV","COLO",4);
1001   gMC->Gsatt("TSA1","SEEN",0);
1002   gMC->Gsatt("TSA2","SEEN",0);
1003   gMC->Gsatt("TSA3","SEEN",0);
1004   gMC->Gsatt("TSA4","SEEN",0);
1005   gMC->Gsatt("TSA5","SEEN",0);
1006   gMC->Gsatt("TOFC","SEEN",1);
1007   gMC->Gsatt("TOFC","COLO",4);
1008   gMC->Gsatt("TSA6","SEEN",0);
1009   gMC->Gsatt("TSA7","SEEN",0);
1010   gMC->Gsatt("TSA8","SEEN",0);
1011   gMC->Gsatt("TIIN","SEEN",1);
1012   gMC->Gsatt("TIIN","COLO",7);
1013   gMC->Gsatt("TII1","SEEN",0);
1014   gMC->Gsatt("TIFC","SEEN",1);
1015   gMC->Gsatt("TIFC","COLO",4);
1016   gMC->Gsatt("TSA9","SEEN",0);
1017   gMC->Gsatt("TS10","SEEN",0);
1018   gMC->Gsatt("TS11","SEEN",0);
1019   gMC->Gsatt("TS12","SEEN",0);
1020   gMC->Gsatt("TS13","SEEN",0);
1021   gMC->Gsatt("TS14","SEEN",0);
1022   gMC->Gsatt("TICC","SEEN",0);
1023   gMC->Gsatt("TICM","SEEN",0);
1024   gMC->Gsatt("TS15","SEEN",0);
1025   gMC->Gsatt("TS16","SEEN",0);
1026   gMC->Gsatt("TS17","SEEN",0);
1027   gMC->Gsatt("TS18","SEEN",0);
1028   gMC->Gsatt("TS19","SEEN",0);
1029   gMC->Gsatt("TPJ1","SEEN",0);
1030   gMC->Gsatt("TPJ2","SEEN",0);
1031   gMC->Gsatt("TICS","SEEN",0);
1032   gMC->Gsatt("TDGN","SEEN",0);
1033   gMC->Gsatt("TIRC","SEEN",0);
1034   gMC->Gsatt("TIC1","SEEN",1);
1035   gMC->Gsatt("TIPP","SEEN",0);
1036   gMC->Gsatt("TIC3","SEEN",0);
1037   gMC->Gsatt("TRCE","SEEN",0);
1038   gMC->Gsatt("TPSC","SEEN",0);
1039   gMC->Gsatt("TPCC","SEEN",0);
1040   gMC->Gsatt("TORC","SEEN",0);
1041   gMC->Gsatt("TOPP","SEEN",0);
1042   gMC->Gsatt("TOC3","SEEN",0);
1043   gMC->Gsatt("TOC1","SEEN",1);
1044   gMC->Gsatt("TSSW","SEEN",1);
1045   gMC->Gsatt("TSWC","SEEN",1);
1046   gMC->Gsatt("TSSW","COLO",3);
1047   gMC->Gsatt("TSWC","COLO",3);
1048   gMC->Gsatt("TSCE","COLO",6);
1049   gMC->Gsatt("TSCE","SEEN",1);
1050   gMC->Gsatt("TWES","SEEN",0);
1051   gMC->Gsatt("TSWB","SEEN",0);
1052   gMC->Gsatt("TPEL","SEEN",0);
1053   gMC->Gsatt("TPMW","SEEN",1);
1054   gMC->Gsatt("TESR","SEEN",1);
1055   gMC->Gsatt("TPMW","COLO",12);
1056   gMC->Gsatt("TIC1","COLO",5);
1057   gMC->Gsatt("TOC1","COLO",5);
1058   gMC->Gsatt("TESB","SEEN",0);
1059   gMC->Gsatt("THVM","SEEN",1);
1060   gMC->Gsatt("THVM","COLO",11);
1061   gMC->Gsatt("THVH","SEEN",0);
1062   gMC->Gsatt("TPSR","SEEN",0);
1063   gMC->Gsatt("THVL","SEEN",0);
1064   gMC->Gsatt("THVC","SEEN",0);
1065   gMC->Gsatt("THVE","SEEN",0);
1066   gMC->Gsatt("THVR","SEEN",0);
1067   gMC->Gsatt("TPSS","SEEN",0);
1068   gMC->Gsatt("TPUS","SEEN",0);
1069   gMC->Gsatt("TPLS","SEEN",0);
1070
1071   //
1072   gMC->Gdopt("hide", "on");
1073   gMC->Gdopt("shad", "on");
1074   gMC->Gsatt("*", "fill", 7);
1075   gMC->SetClipBox(".");
1076   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1077   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1078   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1079   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1080   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1081   gMC->DefaultRange();
1082   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1083   gMC->Gdhead(1111, "Time Projection Chamber");
1084   gMC->Gdman(18, 4, "MAN");
1085   gMC->Gdopt("hide","off");
1086 }
1087
1088 //_____________________________________________________________________________
1089 void AliTPCv1::CreateMaterials()
1090 {
1091   //
1092   // Define materials for Time Projection Chamber
1093   //
1094   AliTPC::CreateMaterials();
1095 }
1096
1097 //_____________________________________________________________________________
1098 void AliTPCv1::Init()
1099 {
1100   //
1101   // Initialises TPC detector after it has been created
1102   //
1103
1104   fIdSens=gMC->VolId("TPC_Strip"); // sensitive strip
1105
1106   printf("%s: *** TPC version 1 initialized***\n",ClassName());
1107
1108   // printf("TPC version 1 initialized\n");
1109 }
1110
1111 //_____________________________________________________________________________
1112 void AliTPCv1::StepManager()
1113 {
1114   //
1115   // Called at every step in the Time Projection Chamber
1116   //
1117   Int_t         copy, id, i;
1118   Float_t       hits[5];
1119   Int_t         vol[2];
1120   TLorentzVector p;
1121  //
1122
1123   id = gMC->CurrentVolID(copy);
1124   if(id!=fIdSens) return;
1125   if(gMC->TrackCharge() && gMC->IsTrackEntering()) {
1126
1127     //
1128     // Only charged tracks entering the sensitive volume
1129     //
1130
1131       gMC->TrackPosition(p);
1132   Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1133   //
1134
1135   //
1136   Double_t angle = TMath::ACos(p[0]/r);
1137   angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1138   //
1139   // angular segment, it is not a real sector number...
1140   //
1141   Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1142                fTPCParam->GetInnerAngle());
1143   // rotate to segment "0"
1144   Float_t cos,sin;
1145   fTPCParam->AdjustCosSin(sector,cos,sin);
1146   Float_t x1 = p[0]*cos + p[1]*sin;
1147   Float_t y1 = TMath::Abs(-p[0]*sin + p[1]*cos);
1148   // calculate real sector number...
1149   if (x1>fTPCParam->GetOuterRadiusLow()){
1150     sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1151              fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1152     if (p[2]<0)         sector+=(fTPCParam->GetNOuterSector()>>1);
1153   }
1154     else
1155       if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);
1156   //
1157   // here I have a sector number
1158   //
1159   vol[0]=sector;
1160   //
1161   Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1162   vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1163   // row numbers are autonomous for lower and upper sectors
1164   if(vol[0] > fTPCParam->GetNInnerSector()) {
1165      vol[1] -= fTPCParam->GetNRowLow();
1166   }
1167   Double_t range = (sector<36) ? fTPCParam->GetYInner(vol[1]) :
1168                    fTPCParam->GetYOuter(vol[1]);
1169   if(y1>range) return;
1170      if(vol[1] == 0){
1171
1172         // because Jouri wants to have this
1173
1174         gMC->TrackMomentum(p);
1175         hits[0]=p[0];
1176         hits[1]=p[1];
1177         hits[2]=p[2];
1178         hits[3]=0.; // this hit has no energy loss
1179         // Get also the track time for pileup simulation
1180         hits[4]=gMC->TrackTime();
1181
1182         AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); // M.I.
1183      }
1184    gMC->TrackPosition(p);
1185       for(i=0;i<3;++i) hits[i]=p[i];
1186       hits[3]=1; //I'd like to have something positive here (I.Belikov)
1187       // Get also the track time for pileup simulation
1188       hits[4]=gMC->TrackTime();
1189
1190       AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); // M.I.
1191
1192   }// track entering sensitive strip
1193
1194 }
1195 //_____________________________________________________________________________
1196
1197
1198