suppress off-line finders ( vertex etc.)
[u/mrichter/AliRoot.git] / TPC / AliTPCv0.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 0 -- "coarse" TPC                        //
22 //                                                                           //
23 //Begin_Html
24 /*
25 <img src="picts/AliTPCv0Class.gif">
26 */
27 //End_Html
28 //                                                                           //
29 //                                                                           //
30 ///////////////////////////////////////////////////////////////////////////////
31
32 #include <Riostream.h>
33
34 #include <TMath.h>
35 #include <TVirtualMC.h>
36 #include <TString.h>
37 #include <TSystem.h>
38
39 #include "AliConst.h"
40 #include "AliRun.h"
41 #include "AliTPCDigitsArray.h"
42 #include "AliTPCParamSR.h"
43 #include "AliTPCv0.h"
44 #include "TGeoManager.h"
45 #include "TGeoVolume.h"
46 #include "TGeoPcon.h"
47 #include "TGeoTube.h"
48 #include "TGeoPgon.h"
49 #include "TGeoTrd1.h"
50 #include "TGeoCompositeShape.h"
51 #include "TGeoPara.h"
52 ClassImp(AliTPCv0)
53  
54 //_____________________________________________________________________________
55 AliTPCv0::AliTPCv0(const char *name, const char *title) 
56          :AliTPC(name, title)
57 {
58   //
59   // Standard creator for TPC version 0
60   //
61
62
63   if (fTPCParam)
64      fTPCParam->Write(fTPCParam->GetTitle());
65 }
66
67 //_____________________________________________________________________________
68 void AliTPCv0::CreateGeometry()
69 {
70
71   //
72   // Creation of the TPC version 0, i.e. no sensitive volumes,
73   // only the material distribution
74   //
75   //Begin_Html
76   /*
77     <img src="picts/AliTPC.gif">
78   */
79   //End_Html
80   //Begin_Html
81   /*
82     <img src="picts/AliTPCv0Tree.gif">
83   */
84   //End_Html
85
86  //----------------------------------------------------------
87   // This geometry is written using TGeo class
88   // Firstly the shapes are defined, and only then the volumes
89   // What is recognized by the MC are volumes
90   //----------------------------------------------------------
91   //
92   //  tpc - this will be the mother volume
93   //
94
95   //
96   // here I define a volume TPC
97   // retrive the medium name with "TPC_" as a leading string
98   //
99   TGeoPcon *tpc = new TGeoPcon(0.,360.,28); //28 sections
100   //
101   tpc->DefineSection(0,-291.,77.,278.);
102   tpc->DefineSection(1,-270,77.,278.);
103   //
104   tpc->DefineSection(2,-270.,77.,278.);
105   tpc->DefineSection(3,-262.1,77.,278.);
106   //
107   tpc->DefineSection(4,-262.1,83.1,278.);
108   tpc->DefineSection(5,-260.,83.1,278.);
109   //
110   tpc->DefineSection(6,-260.,70.,278.);    
111   tpc->DefineSection(7,-259.6,70.,278.);
112   //
113   tpc->DefineSection(8,-259.6,68.1,278.);
114   tpc->DefineSection(9,-253.6,68.1,278.);
115   //
116   tpc->DefineSection(10,-253.6,68.,278.);
117   tpc->DefineSection(11,-74.0,60.8,278.);
118   //
119   tpc->DefineSection(12,-74.0,60.1,278.);
120   tpc->DefineSection(13,-73.3,60.1,278.);
121   //
122   tpc->DefineSection(14,-73.3,56.9,278.); 
123   tpc->DefineSection(15,-68.5,56.9,278.);
124   //
125   tpc->DefineSection(16,-68.5,60.,278.);
126   tpc->DefineSection(17,-65.,60.,278.);
127   //
128   tpc->DefineSection(18,-65.,56.9,278.); 
129   tpc->DefineSection(19,73.3,56.9,278.);
130   //
131   tpc->DefineSection(20,73.3,60.1,278.);
132   tpc->DefineSection(21,74.0,60.1,278.);
133   //
134   tpc->DefineSection(22,74.0,60.8,278.);
135   tpc->DefineSection(23,253.6,65.5,278.);
136   //
137   tpc->DefineSection(24,253.6,65.6,278.);
138   tpc->DefineSection(25,259.6,65.6,278.);
139   //
140   tpc->DefineSection(26,259.6,70.0,278.);
141   tpc->DefineSection(27,291.,77.,278.);
142   //
143   TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
144   TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
145   //
146   // drift volume - sensitive volume, extended beyond the
147   // endcaps, because of the alignment
148   //
149   TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
150   dvol->DefineSection(0,-260.,74.5,264.4);
151   dvol->DefineSection(1,-253.6,74.5,264.4);
152   //
153   dvol->DefineSection(2,-253.6,76.6774,258.);
154   dvol->DefineSection(3,253.6,76.6774,258.); 
155   //
156   dvol->DefineSection(4,253.6,74.5,264.4);
157   dvol->DefineSection(5,260.,74.5,264.4);
158   //
159   TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-1");
160   TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
161   //
162   v1->AddNode(v9,1);
163   //
164   // outer insulator
165   //
166   TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
167   //
168   tpco->DefineSection(0,-256.6,264.8,278.);
169   tpco->DefineSection(1,-253.6,264.8,278.);
170   //
171   tpco->DefineSection(2,-253.6,258.,278.);
172   tpco->DefineSection(3,250.6,258.,278.);
173   //
174   tpco->DefineSection(4,250.6,258.,275.5);
175   tpco->DefineSection(5,253.6,258.,275.5);
176   //
177   TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
178   TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
179   //
180   // outer containment vessel
181   //
182   TGeoPcon *tocv = new TGeoPcon(0.,360.,6);  // containment vessel
183   //
184   tocv->DefineSection(0,-256.6,264.8,278.);
185   tocv->DefineSection(1,-253.6,264.8,278.);
186   //
187   tocv->DefineSection(2,-253.6,274.8124,278.);
188   tocv->DefineSection(3,247.6,274.8124,278.);  
189   //
190   tocv->DefineSection(4,247.6,270.4,278.);
191   tocv->DefineSection(5,250.6,270.4,278.);
192   //
193   TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
194   TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3); 
195   //
196   TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
197   TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
198   TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
199   TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
200   //
201   TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
202   TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
203   TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
204   TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
205   //
206   TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
207   TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
208   TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
209   TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
210   //-------------------------------------------------------
211   //  Tpc Outer Field Cage
212   //  daughters - composite (sandwich)
213   //-------------------------------------------------------
214
215   TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
216   //
217   tofc->DefineSection(0,-253.6,258.,269.6);
218   tofc->DefineSection(1,-250.6,258.,269.6);
219   //
220   tofc->DefineSection(2,-250.6,258.,260.0676); 
221   tofc->DefineSection(3,250.6,258.,260.0676);
222   //
223   tofc->DefineSection(4,250.6,258.,275.5);
224   tofc->DefineSection(5,253.6,258.,275.5);
225   //
226   TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3); 
227   //sandwich
228   TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
229   TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
230   TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
231   //
232   TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
233   //
234   TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
235   TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
236   TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
237   //
238   // outer part - positioning
239   //
240   tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
241   //
242   tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
243   //
244   v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
245   //
246   v2->AddNode(v3,1); v2->AddNode(v4,1); 
247   //
248   v1->AddNode(v2,1);
249   //-----------------------------------------------------------
250   //--------------------------------------------------------------------
251   // Tpc Inner INsulator (CO2) 
252   // the cones, the central drum and the inner f.c. sandwich with a piece
253   // of the flane will be placed in the TPC
254   //--------------------------------------------------------------------
255   TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
256   //
257   tpci->DefineSection(0,-253.6,68.4,76.6774);
258   tpci->DefineSection(1,-74.0,61.2,76.6774);
259   //
260   tpci->DefineSection(2,74.0,61.2,76.6774);  
261   //
262   tpci->DefineSection(3,253.6,65.9,76.6774);
263   //
264   TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
265   //
266   // now the inner field cage - only part of flanges (2 copies)
267   //
268   TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5); 
269   TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
270   //
271  //---------------------------------------------------------
272   // Tpc Inner Containment vessel - Muon side
273   //---------------------------------------------------------
274   TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
275   //
276   tcms->DefineSection(0,-259.1,68.1,74.2);
277   tcms->DefineSection(1,-253.6,68.1,74.2);
278   //
279   tcms->DefineSection(2,-253.6,68.1,68.4);
280   tcms->DefineSection(3,-74.0,60.9,61.2);
281   //
282   tcms->DefineSection(4,-74.0,60.1,61.2);
283   tcms->DefineSection(5,-73.3,60.1,61.2);
284   //
285   tcms->DefineSection(6,-73.3,56.9,61.2);
286   tcms->DefineSection(7,-73.0,56.9,61.2);
287   //
288   tcms->DefineSection(8,-73.0,56.9,58.8);
289   tcms->DefineSection(9,-71.3,56.9,58.8);
290   //
291   TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
292   //-----------------------------------------------
293   // inner containment vessel - shaft side
294   //-----------------------------------------------
295   TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
296   //
297   tcss->DefineSection(0,71.3,56.9,58.8);
298   tcss->DefineSection(1,73.0,56.9,58.8);
299   //
300   tcss->DefineSection(2,73.0,56.9,61.2);
301   tcss->DefineSection(3,73.3,56.9,61.2);
302   //  
303   tcss->DefineSection(4,73.3,60.1,61.2);
304   tcss->DefineSection(5,74.0,60.1,61.2);
305   //
306   tcss->DefineSection(6,74.0,60.9,61.2);
307   tcss->DefineSection(7,253.6,65.6,65.9);
308   //
309   tcss->DefineSection(8,253.6,65.6,74.2);
310   tcss->DefineSection(9,258.1,65.6,74.2);
311   //
312   TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
313   //-----------------------------------------------
314   //  Inner field cage
315   //  define 4 parts and make an assembly
316   //-----------------------------------------------
317   // part1 - Al - 2 copies
318   TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
319   TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
320   // sandwich - outermost parts - 2 copies
321   TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
322   TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
323   TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
324   TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
325   //
326   TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
327   TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
328   TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
329   TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
330   //
331   // middle parts - 2 copies
332   TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
333   TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
334   TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
335   TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
336   //
337   TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
338   TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
339   TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
340   TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
341   // central part - 1 copy
342   TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns 
343   TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
344   TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
345   //
346   TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
347   TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
348   TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
349   //
350   // inner part - positioning
351   //
352   // creating a sandwich
353   tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
354   //
355   tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
356   //
357   tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
358   //
359   TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
360   //
361   tv100->AddNode(tv10,1);
362   tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
363   tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
364   tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
365   tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
366   tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
367   tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
368   //
369   v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
370   v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
371   v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1); 
372   v9->AddNode(tv100,1);
373   //
374   // central drum 
375   //
376   // flange + sandwich
377   //
378   TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
379   cfl->DefineSection(0,-71.1,59.7,61.2);
380   cfl->DefineSection(1,-68.6,59.7,61.2);
381   //
382   cfl->DefineSection(2,-68.6,60.6324,61.2);
383   cfl->DefineSection(3,68.6,60.6324,61.2); 
384   //
385   cfl->DefineSection(4,68.6,59.7,61.2);
386   cfl->DefineSection(5,71.1,59.7,61.2);  
387   //
388   TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
389   // sandwich
390   TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
391   TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
392   TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);  
393   //
394   TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
395   TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
396   TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
397   TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
398   //
399   // seals for central drum 2 copies
400   //
401   TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
402   TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
403   TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
404   v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
405   v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
406   //
407   // seal collars 
408   TGeoPcon *se = new TGeoPcon(0.,360.,6);
409   se->DefineSection(0,-72.8,59.7,61.2);
410   se->DefineSection(1,-72.3,59.7,61.2);
411   //
412   se->DefineSection(2,-72.3,58.85,61.2);
413   se->DefineSection(3,-71.6,58.85,61.2); 
414   //
415   se->DefineSection(4,-71.6,59.7,61.2);
416   se->DefineSection(5,-71.3,59.7,61.2);  
417   //
418   TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
419   //
420   TGeoTube *si = new TGeoTube(56.9,58.8,1.); 
421   TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
422   //
423   // define reflection matrix 
424   //
425   TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
426   //
427   cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
428   //
429   v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
430   v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
431   v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
432   //
433   // central membrane - 2 rings and a mylar membrane - assembly
434   //
435   TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
436   TGeoTube *oh = new TGeoTube(250.,256.,.5);
437   TGeoTube *mem = new TGeoTube(84.05,250,0.01);
438   TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
439   TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
440   TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
441   //
442   TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
443   cm->AddNode(ihv,1);
444   cm->AddNode(ohv,1);
445   cm->AddNode(memv,1);
446   v9->AddNode(cm,1);
447   //
448   // end caps - they are make as an assembly of single segments
449   // containing both readout chambers
450   //
451   Double_t openingAngle = 10.*TMath::DegToRad();
452   Double_t thick=1.5; // rib
453   Double_t shift = thick/TMath::Sin(openingAngle);
454   //
455   Double_t lowEdge = 86.3; // hole in the wheel
456   Double_t upEdge = 240.4; // hole in the wheel
457   //
458   new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
459   //
460   TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
461   //
462   hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
463   hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
464   //
465   hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
466   hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
467   //
468   Double_t ys = shift*TMath::Sin(openingAngle); 
469   Double_t xs = shift*TMath::Cos(openingAngle);
470   TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);  
471   tr->RegisterYourself();
472   TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
473   TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
474   TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
475   bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
476   bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
477   TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
478   TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
479   //
480   ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
481   //
482   // readout chambers
483   //
484   // IROC first
485   //
486    TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
487    TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
488   // empty space
489    TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
490    TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
491    ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
492    //bars
493    Double_t tga = (19.8328-12.3742)/39.3;
494    Double_t xmin,xmax;
495    xmin = 9.55*tga+12.3742;
496    xmax = 9.95*tga+12.3742;
497    TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
498    TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
499    empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
500    xmin=19.4*tga+12.3742;
501    xmax=19.9*tga+12.3742;
502    TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
503    TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
504    empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
505    xmin=29.35*tga+12.3742;
506    xmax=29.75*tga+12.3742;
507    TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2); 
508    TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);    
509    empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
510    //
511    // holes for connectors
512    //
513    TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
514    TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
515    TString fileName(gSystem->Getenv("ALICE_ROOT"));
516    fileName += "/TPC/conn_iroc.dat";
517    ifstream in;
518    in.open(fileName.Data(), ios_base::in); // asci file
519    for(Int_t i =0;i<86;i++){
520       Double_t y = 3.99;
521       Double_t x,z,ang;
522       in>>x>>z>>ang;
523       z-=26.5;
524       TGeoRotation *rrr = new TGeoRotation();
525       rrr->RotateY(ang);
526       TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
527       ibdv->AddNode(connv,i+1,trans);
528    }
529    in.close();
530    // "cap"
531    new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
532    // "hole"
533    new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
534    TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);  
535    tr1->RegisterYourself();
536    TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
537    TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
538    //
539    // pad plane and wire fixations
540    //
541    TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
542    TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
543    TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
544    TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
545    TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
546    TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
547    TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
548    //
549    TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
550    //
551    iroc->AddNode(ibdv,1);
552    iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
553    iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
554    tga =(23.3521-14.5974)/49.65; 
555    Double_t xx = 24.825*tga+14.5974-0.6;
556    iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
557    iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
558    //
559    // OROC
560    //
561    TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
562    TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
563    TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
564    TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
565    obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
566    //horizontal bars
567    tga=(38.5084-20.2938)/99.3;
568    xmin=tga*10.2+20.2938;
569    xmax=tga*10.6+20.2938;
570    TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
571    TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
572    //
573    xmin=22.55*tga+20.2938;
574    xmax=24.15*tga+20.2938;
575    TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
576    TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
577    //
578    xmin=36.1*tga+20.2938;
579    xmax=36.5*tga+20.2938;
580    TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
581    TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
582    //
583    xmin=49.0*tga+20.2938;
584    xmax=50.6*tga+20.2938;   
585    TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
586    TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
587    //
588    xmin=63.6*tga+20.2938;
589    xmax=64.0*tga+20.2938;
590    TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
591    TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
592    //
593    xmin=75.5*tga+20.2938;
594    xmax=77.15*tga+20.2938;
595    TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
596    TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
597    //
598    xmin=88.7*tga+20.2938;
599    xmax=89.1*tga+20.2938;
600    TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
601    TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
602    //
603    oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
604    oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
605    oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
606    oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
607    oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
608    oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
609    oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
610    // vertical bars
611    TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1); 
612    TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
613    TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
614    TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
615    TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
616    //
617    TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
618    TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
619    TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
620    TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
621    TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
622    //
623    oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
624    oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
625    oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
626    oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
627    oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
628    oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
629    oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
630    oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
631    //
632    // holes for connectors
633    //
634    fileName = gSystem->Getenv("ALICE_ROOT");
635    fileName += "/TPC/conn_oroc.dat";
636    in.open(fileName.Data(), ios_base::in); // asci file
637    for(Int_t i =0;i<78;i++){
638       Double_t y =3.89;
639       Double_t x,z,ang;
640       Double_t x1,z1,x2,z2;
641       in>>x>>z>>ang;        
642       Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
643       Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
644       //
645       x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;      
646       //
647       TGeoRotation *rr = new TGeoRotation();
648       rr->RotateY(ang); 
649       z1-=54.95;
650       z2-=54.95;
651       TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
652       TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
653       obdv->AddNode(connv,i+1,trans1);
654       obdv->AddNode(connv,i+79,trans2);
655    }
656    in.close();
657    // cap
658    new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
659    new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
660    TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
661    tr5->RegisterYourself();
662    TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
663    TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
664    //
665    // pad plane and wire fixations
666    //
667    TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
668    TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
669    //
670    tga=(43.5239-23.3874)/114.2;
671    TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
672    TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);  
673    xx = 57.1*tga+23.3874-0.7;
674    TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
675    TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
676    //
677    TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
678    //
679    oroc->AddNode(obdv,1);
680    oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
681    oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
682    oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
683    oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
684    // 
685    // now iroc and oroc are placed into a sector...
686    //
687    TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
688    TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
689    //
690
691    TGeoRotation rot1("rot1",90.,90.,0.);
692    TGeoRotation rot2("rot2");
693    rot2.RotateY(10.);
694    TGeoRotation *rot = new TGeoRotation("rot");
695    *rot=rot1*rot2;
696    //
697    Double_t x0,y0;
698    x0=110.2*TMath::Cos(openingAngle);
699    y0=110.2*TMath::Sin(openingAngle);
700    TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side 
701    TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
702    x0=188.45*TMath::Cos(openingAngle);
703    y0=188.45*TMath::Sin(openingAngle);
704    TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
705    TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
706    //
707    // A-side
708    //
709    secta->AddNode(ch,1);
710    secta->AddNode(iroc,1,combi1a);
711    secta->AddNode(oroc,1,combi2a);
712    //
713    // C-side
714    //
715    sectc->AddNode(ch,1);
716    sectc->AddNode(iroc,1,combi1c);
717    sectc->AddNode(oroc,1,combi2c);
718    //
719    // now I try to make  wheels...
720    //
721    TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
722    TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
723    //
724    for(Int_t i =0;i<18;i++){
725      Double_t phi = (20.*i);
726      TGeoRotation *r = new TGeoRotation();
727      r->RotateZ(phi);
728      wheela->AddNode(secta,i+1,r);
729      wheelc->AddNode(sectc,i+1,r);    
730    }
731    // wheels in the drift volume!
732    TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
733    v9->AddNode(wheela,1,combi3);
734    v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
735    //_____________________________________________________________
736    // service support wheel
737    //_____________________________________________________________
738   TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
739   sw->DefineSection(0,-4.,80.5,251.75);
740   sw->DefineSection(1,4.,80.5,251.75); 
741   TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
742   //
743   thick=1.;
744   shift = thick/TMath::Sin(openingAngle);
745   TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
746   sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
747   sh->DefineSection(1,4.,81.5-shift,250.75-shift);
748   TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
749   //
750   TGeoMedium *m9 =  gGeoManager->GetMedium("TPC_Si"); 
751   TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
752   el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
753   el->DefineSection(1,1.872,81.5-shift,250.75-shift);
754   TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si 
755   //
756   shv->AddNode(elv,1);
757   //
758   //
759   ys = shift*TMath::Sin(openingAngle);
760   xs = shift*TMath::Cos(openingAngle);
761   swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
762   // cover
763   TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
764   co->DefineSection(0,-0.5,77.,255.25);
765   co->DefineSection(1,0.5,77.,255.25);
766   TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
767   // hole in a cover
768   TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
769   shift=4./TMath::Sin(openingAngle);
770   coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
771   coh->DefineSection(1,0.5,85.-shift,247.25-shift);  
772   //
773   TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
774   //
775   ys = shift*TMath::Sin(openingAngle);
776   xs = shift*TMath::Cos(openingAngle);  
777   cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
778   //
779   // Sector as an Assembly
780   //
781   TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
782   swhs->AddNode(swv,1);
783   swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
784   swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
785   //
786   // SSW as an Assembly of sectors
787   //
788  TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
789    for(Int_t i =0;i<18;i++){
790      Double_t phi = (20.*i);
791      TGeoRotation *r = new TGeoRotation();
792      r->RotateZ(phi);
793      swheel->AddNode(swhs,i+1,r);   
794    }
795    v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
796    v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
797    //
798   //----------------------------------------------------------
799   // TPc Support Rods - MAKROLON
800   //----------------------------------------------------------
801   TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
802   TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
803   TGeoMedium *m10 =  gGeoManager->GetMedium("TPC_Alumina");
804   TGeoMedium *m11 =  gGeoManager->GetMedium("TPC_Peek");
805   TGeoMedium *m12 =  gGeoManager->GetMedium("TPC_Water");
806   // upper and lower rods differ in length!
807   Double_t *upar;
808   upar=NULL;
809   gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
810   upar=new Double_t [3];
811   upar[0]=1.8;
812   upar[1]=2.2;
813   
814   //
815   //HV rods - makrolon + 0.58cm (diameter) Cu
816   TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
817   TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
818   //
819   TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
820   TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
821   hvrv->AddNode(hvcv,1);
822   //
823   // resistor rods
824   //
825   TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner 
826   TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer 
827   TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
828   TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
829   //
830   TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
831   TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);    
832   TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
833   TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);   
834   //
835   // ceramic rod with water
836   //
837   criv->AddNode(cwiv,1); 
838   crov->AddNode(cwov,1);
839   //
840   TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner 
841   TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer    
842   //
843   // peek rod
844   //
845   TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
846   TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12);
847   //
848   // resistor rods assembly
849   //
850    TGeoRotation *rotr = new TGeoRotation("rotr");
851    rotr->RotateZ(-21.);
852   TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
853   TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
854   //
855   TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
856   TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);  
857   //
858   TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
859   TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
860   rrin->AddNode(rriv,1);
861   rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
862   rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.)); 
863   rrin->AddNode(priv,1); 
864   //
865   rrou->AddNode(rrov,1);
866   rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
867   rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.)); 
868   rrou->AddNode(prov,1); 
869   for(Int_t i=0;i<18;i++){
870     Double_t angle,x,y;
871     Double_t z,r; 
872     angle=TMath::DegToRad()*20.*(Double_t)i;
873     r=81.5;
874     x=r * TMath::Cos(angle);
875     y=r * TMath::Sin(angle);
876     upar[2]=126.64; //lower
877     z= 126.96;
878     if(i==3){
879       v9->AddNode(rrin,1,new TGeoCombiTrans(x,y,z,rotr)); //A
880       v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z,rotr)); //C       
881     } 
882     else { 
883       gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
884       gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
885     }
886
887
888     //
889     r=254.25;
890     x=r * TMath::Cos(angle);
891     y=r * TMath::Sin(angle);
892     upar[2]=126.54; //upper
893     z=127.06;
894     //
895     if(i==15){
896       //v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
897       v9->AddNode(hvrv,1,new TGeoTranslation(x,y,127.14));//A-side only
898       gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
899     }
900     else if(i==11){
901       v9->AddNode(rrou,1,new TGeoCombiTrans(x,y,z,rotr)); //A
902       v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
903     }
904     else{
905     //
906       gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
907       gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
908     }
909
910   }
911
912   TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
913   alice->AddNode(v1,1);
914   
915
916 } // end of function
917
918
919 //_____________________________________________________________________________
920 void AliTPCv0::CreateMaterials()
921 {
922   //
923   // Define materials for the TPC
924   //
925   AliTPC::CreateMaterials();
926 }
927
928
929 //_____________________________________________________________________________
930 void AliTPCv0::Init()
931 {
932   //
933   // Initialise Time Projection Chamber version 0
934   //
935  
936   printf("%s: *** TPC version 0 initialized***\n",ClassName()); 
937
938   //  printf("TPC version 0 initialized\n");
939 }
940
941 //_____________________________________________________________________________
942 void AliTPCv0::StepManager()
943 {
944   //
945   // Procedure called at each step in the TPC
946   //
947 }