b7279088b8b0da8462eb6883db58c014c68afaac
[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 <TGeometry.h>
35 #include <TMath.h>
36 #include <TNode.h>
37 #include <TTUBE.h>
38 #include <TVirtualMC.h>
39 #include <TString.h>
40 #include <TSystem.h>
41
42 #include "AliConst.h"
43 #include "AliRun.h"
44 #include "AliTPCDigitsArray.h"
45 #include "AliTPCParamSR.h"
46 #include "AliTPCv0.h"
47 #include "TGeoManager.h"
48 #include "TGeoVolume.h"
49 #include "TGeoPcon.h"
50 #include "TGeoTube.h"
51 #include "TGeoPgon.h"
52 #include "TGeoTrd1.h"
53 #include "TGeoCompositeShape.h"
54 #include "TGeoPara.h"
55 ClassImp(AliTPCv0)
56  
57 //_____________________________________________________________________________
58 AliTPCv0::AliTPCv0(const char *name, const char *title) 
59          :AliTPC(name, title)
60 {
61   //
62   // Standard creator for TPC version 0
63   //
64
65
66   if (fTPCParam)
67      fTPCParam->Write(fTPCParam->GetTitle());
68 }
69
70 //_____________________________________________________________________________
71 void AliTPCv0::CreateGeometry()
72 {
73
74   //
75   // Creation of the TPC version 0, i.e. no sensitive volumes,
76   // only the material distribution
77   //
78   //Begin_Html
79   /*
80     <img src="picts/AliTPC.gif">
81   */
82   //End_Html
83   //Begin_Html
84   /*
85     <img src="picts/AliTPCv0Tree.gif">
86   */
87   //End_Html
88
89  //----------------------------------------------------------
90   // This geometry is written using TGeo class
91   // Firstly the shapes are defined, and only then the volumes
92   // What is recognized by the MC are volumes
93   //----------------------------------------------------------
94   //
95   //  tpc - this will be the mother volume
96   //
97
98   //
99   // here I define a volume TPC
100   // retrive the medium name with "TPC_" as a leading string
101   //
102   TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
103   tpc->DefineSection(0,-290.,77.,278.);
104   tpc->DefineSection(1,-259.6,70.,278.);
105   //
106   tpc->DefineSection(2,-259.6,68.1,278.);
107   tpc->DefineSection(3,-253.6,68.1,278.);
108   //
109   tpc->DefineSection(4,-253.6,68.,278.);
110   tpc->DefineSection(5,-74.0,60.8,278.);
111   //
112   tpc->DefineSection(6,-74.0,60.1,278.);
113   tpc->DefineSection(7,-73.3,60.1,278.);
114   //
115   tpc->DefineSection(8,-73.3,56.9,278.); 
116   tpc->DefineSection(9,73.3,56.9,278.);
117   //
118   tpc->DefineSection(10,73.3,60.1,278.);
119   tpc->DefineSection(11,74.0,60.1,278.);
120   //
121   tpc->DefineSection(12,74.0,60.8,278.);
122   tpc->DefineSection(13,253.6,65.5,278.);
123   //
124   tpc->DefineSection(14,253.6,65.6,278.);
125   tpc->DefineSection(15,259.6,65.6,278.);
126   //
127   tpc->DefineSection(16,259.6,70.0,278.);
128   tpc->DefineSection(17,290.,77.,278.);
129   //
130   TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
131   TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
132   //
133   // drift volume - sensitive volume, extended beyond the
134   // endcaps, because of the alignment
135   //
136   TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
137   dvol->DefineSection(0,-260.,74.5,264.4);
138   dvol->DefineSection(1,-253.6,74.5,264.4);
139   //
140   dvol->DefineSection(2,-253.6,76.6774,258.);
141   dvol->DefineSection(3,253.6,76.6774,258.); 
142   //
143   dvol->DefineSection(4,253.6,74.5,264.4);
144   dvol->DefineSection(5,260.,74.5,264.4);
145   //
146   TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-1");
147   TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
148   //
149   v1->AddNode(v9,1);
150   //
151   // outer insulator
152   //
153   TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
154   //
155   tpco->DefineSection(0,-256.6,264.8,278.);
156   tpco->DefineSection(1,-253.6,264.8,278.);
157   //
158   tpco->DefineSection(2,-253.6,258.,278.);
159   tpco->DefineSection(3,250.6,258.,278.);
160   //
161   tpco->DefineSection(4,250.6,258.,275.5);
162   tpco->DefineSection(5,253.6,258.,275.5);
163   //
164   TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
165   TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
166   //
167   // outer containment vessel
168   //
169   TGeoPcon *tocv = new TGeoPcon(0.,360.,6);  // containment vessel
170   //
171   tocv->DefineSection(0,-256.6,264.8,278.);
172   tocv->DefineSection(1,-253.6,264.8,278.);
173   //
174   tocv->DefineSection(2,-253.6,274.8124,278.);
175   tocv->DefineSection(3,247.6,274.8124,278.);  
176   //
177   tocv->DefineSection(4,247.6,270.4,278.);
178   tocv->DefineSection(5,250.6,270.4,278.);
179   //
180   TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
181   TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3); 
182   //
183   TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
184   TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
185   TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
186   TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
187   //
188   TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
189   TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
190   TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
191   TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
192   //
193   TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
194   TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
195   TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
196   TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
197   //-------------------------------------------------------
198   //  Tpc Outer Field Cage
199   //  daughters - composite (sandwich)
200   //-------------------------------------------------------
201
202   TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
203   //
204   tofc->DefineSection(0,-253.6,258.,269.6);
205   tofc->DefineSection(1,-250.6,258.,269.6);
206   //
207   tofc->DefineSection(2,-250.6,258.,260.0676); 
208   tofc->DefineSection(3,250.6,258.,260.0676);
209   //
210   tofc->DefineSection(4,250.6,258.,275.5);
211   tofc->DefineSection(5,253.6,258.,275.5);
212   //
213   TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3); 
214   //sandwich
215   TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
216   TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
217   TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
218   //
219   TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
220   //
221   TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
222   TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
223   TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
224   //
225   // outer part - positioning
226   //
227   tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
228   //
229   tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
230   //
231   v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
232   //
233   v2->AddNode(v3,1); v2->AddNode(v4,1); 
234   //
235   v1->AddNode(v2,1);
236   //-----------------------------------------------------------
237   //--------------------------------------------------------------------
238   // Tpc Inner INsulator (CO2) 
239   // the cones, the central drum and the inner f.c. sandwich with a piece
240   // of the flane will be placed in the TPC
241   //--------------------------------------------------------------------
242   TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
243   //
244   tpci->DefineSection(0,-253.6,68.4,76.6774);
245   tpci->DefineSection(1,-74.0,61.2,76.6774);
246   //
247   tpci->DefineSection(2,74.0,61.2,76.6774);  
248   //
249   tpci->DefineSection(3,253.6,65.9,76.6774);
250   //
251   TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
252   //
253   // now the inner field cage - only part of flanges (2 copies)
254   //
255   TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5); 
256   TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
257   //
258  //---------------------------------------------------------
259   // Tpc Inner Containment vessel - Muon side
260   //---------------------------------------------------------
261   TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
262   //
263   tcms->DefineSection(0,-259.1,68.1,74.2);
264   tcms->DefineSection(1,-253.6,68.1,74.2);
265   //
266   tcms->DefineSection(2,-253.6,68.1,68.4);
267   tcms->DefineSection(3,-74.0,60.9,61.2);
268   //
269   tcms->DefineSection(4,-74.0,60.1,61.2);
270   tcms->DefineSection(5,-73.3,60.1,61.2);
271   //
272   tcms->DefineSection(6,-73.3,56.9,61.2);
273   tcms->DefineSection(7,-73.0,56.9,61.2);
274   //
275   tcms->DefineSection(8,-73.0,56.9,58.8);
276   tcms->DefineSection(9,-71.3,56.9,58.8);
277   //
278   TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
279   //-----------------------------------------------
280   // inner containment vessel - shaft side
281   //-----------------------------------------------
282   TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
283   //
284   tcss->DefineSection(0,71.3,56.9,58.8);
285   tcss->DefineSection(1,73.0,56.9,58.8);
286   //
287   tcss->DefineSection(2,73.0,56.9,61.2);
288   tcss->DefineSection(3,73.3,56.9,61.2);
289   //  
290   tcss->DefineSection(4,73.3,60.1,61.2);
291   tcss->DefineSection(5,74.0,60.1,61.2);
292   //
293   tcss->DefineSection(6,74.0,60.9,61.2);
294   tcss->DefineSection(7,253.6,65.6,65.9);
295   //
296   tcss->DefineSection(8,253.6,65.6,74.2);
297   tcss->DefineSection(9,258.1,65.6,74.2);
298   //
299   TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
300   //-----------------------------------------------
301   //  Inner field cage
302   //  define 4 parts and make an assembly
303   //-----------------------------------------------
304   // part1 - Al - 2 copies
305   TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
306   TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
307   // sandwich - outermost parts - 2 copies
308   TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
309   TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
310   TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
311   TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
312   //
313   TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
314   TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
315   TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
316   TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
317   //
318   // middle parts - 2 copies
319   TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
320   TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
321   TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
322   TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
323   //
324   TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
325   TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
326   TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
327   TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
328   // central part - 1 copy
329   TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns 
330   TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
331   TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
332   //
333   TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
334   TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
335   TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
336   //
337   // inner part - positioning
338   //
339   // creating a sandwich
340   tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
341   //
342   tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
343   //
344   tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
345   //
346   TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
347   //
348   tv100->AddNode(tv10,1);
349   tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
350   tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
351   tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
352   tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
353   tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
354   tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
355   //
356   v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
357   v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
358   v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1); 
359   v9->AddNode(tv100,1);
360   //
361   // central drum 
362   //
363   // flange + sandwich
364   //
365   TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
366   cfl->DefineSection(0,-71.1,59.7,61.2);
367   cfl->DefineSection(1,-68.6,59.7,61.2);
368   //
369   cfl->DefineSection(2,-68.6,60.6324,61.2);
370   cfl->DefineSection(3,68.6,60.6324,61.2); 
371   //
372   cfl->DefineSection(4,68.6,59.7,61.2);
373   cfl->DefineSection(5,71.1,59.7,61.2);  
374   //
375   TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
376   // sandwich
377   TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
378   TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
379   TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);  
380   //
381   TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
382   TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
383   TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
384   TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
385   //
386   // seals for central drum 2 copies
387   //
388   TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
389   TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
390   TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
391   v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.));
392   v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.));
393   //
394   // seal collars 
395   TGeoPcon *se = new TGeoPcon(0.,360.,6);
396   se->DefineSection(0,-72.8,59.7,61.2);
397   se->DefineSection(1,-72.3,59.7,61.2);
398   //
399   se->DefineSection(2,-72.3,58.85,61.2);
400   se->DefineSection(3,-71.6,58.85,61.2); 
401   //
402   se->DefineSection(4,-71.6,59.7,61.2);
403   se->DefineSection(5,-71.3,59.7,61.2);  
404   //
405   TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
406   //
407   TGeoTube *si = new TGeoTube(56.9,58.8,1.); 
408   TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
409   //
410   // define reflection matrix 
411   //
412   TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
413   //
414   cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
415   //
416   v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
417   v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
418   v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
419   //
420   // central membrane - 2 rings and a mylar membrane - assembly
421   //
422   TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
423   TGeoTube *oh = new TGeoTube(250.,256.,.5);
424   TGeoTube *mem = new TGeoTube(84.05,250,0.01);
425   TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
426   TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
427   TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
428   //
429   TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
430   cm->AddNode(ihv,1);
431   cm->AddNode(ohv,1);
432   cm->AddNode(memv,1);
433   v9->AddNode(cm,1);
434   //
435   // end caps - they are make as an assembly of single segments
436   // containing both readout chambers
437   //
438   Double_t openingAngle = 10.*TMath::DegToRad();
439   Double_t thick=1.5; // rib
440   Double_t shift = thick/TMath::Sin(openingAngle);
441   //
442   Double_t lowEdge = 86.3; // hole in the wheel
443   Double_t upEdge = 240.4; // hole in the wheel
444   //
445   new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
446   //
447   TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
448   //
449   hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
450   hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
451   //
452   hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
453   hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
454   //
455   Double_t ys = shift*TMath::Sin(openingAngle); 
456   Double_t xs = shift*TMath::Cos(openingAngle);
457   TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);  
458   tr->RegisterYourself();
459   TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
460   TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
461   TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
462   bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
463   bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
464   TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
465   TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
466   //
467   ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
468   //
469   // readout chambers
470   //
471   // IROC first
472   //
473    TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
474    TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
475   // empty space
476    TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
477    TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
478    ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
479    //bars
480    Double_t tga = (19.8328-12.3742)/39.3;
481    Double_t xmin,xmax;
482    xmin = 9.55*tga+12.3742;
483    xmax = 9.95*tga+12.3742;
484    TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
485    TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
486    empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
487    xmin=19.4*tga+12.3742;
488    xmax=19.9*tga+12.3742;
489    TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
490    TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
491    empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
492    xmin=29.35*tga+12.3742;
493    xmax=29.75*tga+12.3742;
494    TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2); 
495    TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);    
496    empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
497    //
498    // holes for connectors
499    //
500    TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
501    TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
502    TString fileName(gSystem->Getenv("ALICE_ROOT"));
503    fileName += "/TPC/conn_iroc.dat";
504    ifstream in;
505    in.open(fileName.Data(), ios_base::in); // asci file
506    for(Int_t i =0;i<86;i++){
507       Double_t y = 3.99;
508       Double_t x,z,ang;
509       in>>x>>z>>ang;
510       z-=26.5;
511       TGeoRotation *rrr = new TGeoRotation();
512       rrr->RotateY(ang);
513       TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
514       ibdv->AddNode(connv,i+1,trans);
515    }
516    in.close();
517    // "cap"
518    new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
519    // "hole"
520    new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
521    TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);  
522    tr1->RegisterYourself();
523    TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
524    TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
525    //
526    // pad plane and wire fixations
527    //
528    TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
529    TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
530    TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
531    TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
532    TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
533    TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
534    TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
535    //
536    TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
537    //
538    iroc->AddNode(ibdv,1);
539    iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
540    iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
541    tga =(23.3521-14.5974)/49.65; 
542    Double_t xx = 24.825*tga+14.5974-0.6;
543    iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
544    iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
545    //
546    // OROC
547    //
548    TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
549    TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
550    TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
551    TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
552    obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
553    //horizontal bars
554    tga=(38.5084-20.2938)/99.3;
555    xmin=tga*10.2+20.2938;
556    xmax=tga*10.6+20.2938;
557    TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
558    TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
559    //
560    xmin=22.55*tga+20.2938;
561    xmax=24.15*tga+20.2938;
562    TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
563    TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
564    //
565    xmin=36.1*tga+20.2938;
566    xmax=36.5*tga+20.2938;
567    TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
568    TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
569    //
570    xmin=49.0*tga+20.2938;
571    xmax=50.6*tga+20.2938;   
572    TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
573    TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
574    //
575    xmin=63.6*tga+20.2938;
576    xmax=64.0*tga+20.2938;
577    TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
578    TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
579    //
580    xmin=75.5*tga+20.2938;
581    xmax=77.15*tga+20.2938;
582    TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
583    TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
584    //
585    xmin=88.7*tga+20.2938;
586    xmax=89.1*tga+20.2938;
587    TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
588    TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
589    //
590    oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
591    oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
592    oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
593    oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
594    oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
595    oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
596    oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
597    // vertical bars
598    TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1); 
599    TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
600    TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
601    TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
602    TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
603    //
604    TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
605    TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
606    TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
607    TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
608    TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
609    //
610    oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
611    oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
612    oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
613    oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
614    oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
615    oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
616    oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
617    oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
618    //
619    // holes for connectors
620    //
621    fileName = gSystem->Getenv("ALICE_ROOT");
622    fileName += "/TPC/conn_oroc.dat";
623    in.open(fileName.Data(), ios_base::in); // asci file
624    for(Int_t i =0;i<78;i++){
625       Double_t y =3.89;
626       Double_t x,z,ang;
627       Double_t x1,z1,x2,z2;
628       in>>x>>z>>ang;        
629       Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
630       Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
631       //
632       x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;      
633       //
634       TGeoRotation *rr = new TGeoRotation();
635       rr->RotateY(ang); 
636       z1-=54.95;
637       z2-=54.95;
638       TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
639       TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
640       obdv->AddNode(connv,i+1,trans1);
641       obdv->AddNode(connv,i+79,trans2);
642    }
643    in.close();
644    // cap
645    new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
646    new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
647    TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
648    tr5->RegisterYourself();
649    TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
650    TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
651    //
652    // pad plane and wire fixations
653    //
654    TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
655    TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
656    //
657    tga=(43.5239-23.3874)/114.2;
658    TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
659    TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);  
660    xx = 57.1*tga+23.3874-0.7;
661    TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
662    TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
663    //
664    TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
665    //
666    oroc->AddNode(obdv,1);
667    oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
668    oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
669    oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
670    oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
671    // 
672    // now iroc and oroc are placed into a sector...
673    //
674    TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
675    TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
676    //
677
678    TGeoRotation rot1("rot1",90.,90.,0.);
679    TGeoRotation rot2("rot2");
680    rot2.RotateY(10.);
681    TGeoRotation *rot = new TGeoRotation("rot");
682    *rot=rot1*rot2;
683    //
684    Double_t x0,y0;
685    x0=110.2*TMath::Cos(openingAngle);
686    y0=110.2*TMath::Sin(openingAngle);
687    TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side 
688    TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
689    x0=188.45*TMath::Cos(openingAngle);
690    y0=188.45*TMath::Sin(openingAngle);
691    TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
692    TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
693    //
694    // A-side
695    //
696    secta->AddNode(ch,1);
697    secta->AddNode(iroc,1,combi1a);
698    secta->AddNode(oroc,1,combi2a);
699    //
700    // C-side
701    //
702    sectc->AddNode(ch,1);
703    sectc->AddNode(iroc,1,combi1c);
704    sectc->AddNode(oroc,1,combi2c);
705    //
706    // now I try to make  wheels...
707    //
708    TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
709    TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
710    //
711    for(Int_t i =0;i<18;i++){
712      Double_t phi = (20.*i);
713      TGeoRotation *r = new TGeoRotation();
714      r->RotateZ(phi);
715      wheela->AddNode(secta,i+1,r);
716      wheelc->AddNode(sectc,i+1,r);    
717    }
718    // wheels in the drift volume!
719    TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
720    v9->AddNode(wheela,1,combi3);
721    v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
722    //_____________________________________________________________
723    // service support wheel
724    //_____________________________________________________________
725   TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
726   sw->DefineSection(0,-4.,80.5,251.75);
727   sw->DefineSection(1,4.,80.5,251.75); 
728   TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
729   //
730   thick=1.;
731   shift = thick/TMath::Sin(openingAngle);
732   TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
733   sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
734   sh->DefineSection(1,4.,81.5-shift,250.75-shift);
735   TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
736   //
737   TGeoMedium *m9 =  gGeoManager->GetMedium("TPC_Si"); 
738   TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
739   el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
740   el->DefineSection(1,1.872,81.5-shift,250.75-shift);
741   TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si 
742   //
743   shv->AddNode(elv,1);
744   //
745   //
746   ys = shift*TMath::Sin(openingAngle);
747   xs = shift*TMath::Cos(openingAngle);
748   swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
749   // cover
750   TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
751   co->DefineSection(0,-0.5,77.,255.25);
752   co->DefineSection(1,0.5,77.,255.25);
753   TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
754   // hole in a cover
755   TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
756   shift=4./TMath::Sin(openingAngle);
757   coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
758   coh->DefineSection(1,0.5,85.-shift,247.25-shift);  
759   //
760   TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
761   //
762   ys = shift*TMath::Sin(openingAngle);
763   xs = shift*TMath::Cos(openingAngle);  
764   cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
765   //
766   // Sector as an Assembly
767   //
768   TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
769   swhs->AddNode(swv,1);
770   swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
771   swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
772   //
773   // SSW as an Assembly of sectors
774   //
775  TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
776    for(Int_t i =0;i<18;i++){
777      Double_t phi = (20.*i);
778      TGeoRotation *r = new TGeoRotation();
779      r->RotateZ(phi);
780      swheel->AddNode(swhs,i+1,r);   
781    }
782    v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
783    v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
784    //
785   //----------------------------------------------------------
786   // TPc Support Rods - MAKROLON
787   //----------------------------------------------------------
788   TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
789   TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
790   // upper and lower rods differ in length!
791   Double_t *upar;
792   upar=NULL;
793   gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
794   upar=new Double_t [3];
795   upar[0]=1.8;
796   upar[1]=2.2;
797   
798   //
799   //HV rods - makrolon + 0.58cm (diameter) Cu
800   TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
801   TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
802   //
803   TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
804   TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
805   hvrv->AddNode(hvcv,1);
806   for(Int_t i=0;i<18;i++){
807     Double_t angle,x,y;
808     Double_t z,r; 
809     angle=TMath::DegToRad()*20.*(Double_t)i;
810     r=81.5;
811     x=r * TMath::Cos(angle);
812     y=r * TMath::Sin(angle);
813     upar[2]=126.64; //lower
814     z= 126.96;
815     if(i==15){
816       v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
817       v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
818     }
819     else{
820      gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
821      gGeoManager->Node("TPC_Rod",i+18,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
822     }
823     r=254.25;
824     x=r * TMath::Cos(angle);
825     y=r * TMath::Sin(angle);
826     upar[2]=126.54; //upper
827     z=127.06;
828     gGeoManager->Node("TPC_Rod",i+36,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
829     gGeoManager->Node("TPC_Rod",i+54,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
830   }
831
832   TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
833   alice->AddNode(v1,1);
834   
835
836 } // end of function
837
838
839 //_____________________________________________________________________________
840 void AliTPCv0::CreateMaterials()
841 {
842   //
843   // Define materials for the TPC
844   //
845   AliTPC::CreateMaterials();
846 }
847
848 //_____________________________________________________________________________
849 void AliTPCv0::DrawDetector()
850 {
851   //
852   // Draw a shaded view of the Time Projection Chamber version 0
853   //
854
855   // Set everything unseen
856   gMC->Gsatt("*", "seen", -1);
857   // 
858   // Set ALIC mother transparent
859   gMC->Gsatt("ALIC","SEEN",0);
860   //
861   // Set the volumes visible
862   gMC->Gsatt("TPC ","SEEN",0);
863   gMC->Gsatt("TOIN","SEEN",1);
864   gMC->Gsatt("TOIN","COLO",7);
865   gMC->Gsatt("TOCV","SEEN",1);
866   gMC->Gsatt("TOCV","COLO",4);
867   gMC->Gsatt("TSA1","SEEN",0);
868   gMC->Gsatt("TSA2","SEEN",0);
869   gMC->Gsatt("TSA3","SEEN",0);
870   gMC->Gsatt("TSA4","SEEN",0);  
871   gMC->Gsatt("TSA5","SEEN",0);
872   gMC->Gsatt("TOFC","SEEN",1);
873   gMC->Gsatt("TOFC","COLO",4);
874   gMC->Gsatt("TSA6","SEEN",0);
875   gMC->Gsatt("TSA7","SEEN",0);
876   gMC->Gsatt("TSA8","SEEN",0);    
877   gMC->Gsatt("TIIN","SEEN",1);
878   gMC->Gsatt("TIIN","COLO",7);
879   gMC->Gsatt("TII1","SEEN",0);
880   gMC->Gsatt("TIFC","SEEN",1);
881   gMC->Gsatt("TIFC","COLO",4);
882   gMC->Gsatt("TSA9","SEEN",0); 
883   gMC->Gsatt("TS10","SEEN",0);
884   gMC->Gsatt("TS11","SEEN",0);
885   gMC->Gsatt("TS12","SEEN",0);
886   gMC->Gsatt("TS13","SEEN",0);
887   gMC->Gsatt("TS14","SEEN",0);
888   gMC->Gsatt("TICC","SEEN",0);
889   gMC->Gsatt("TICM","SEEN",0);
890   gMC->Gsatt("TS15","SEEN",0);
891   gMC->Gsatt("TS16","SEEN",0);
892   gMC->Gsatt("TS17","SEEN",0);
893   gMC->Gsatt("TS18","SEEN",0);  
894   gMC->Gsatt("TS19","SEEN",0); 
895   gMC->Gsatt("TPJ1","SEEN",0);
896   gMC->Gsatt("TPJ2","SEEN",0);
897   gMC->Gsatt("TICS","SEEN",0);
898   gMC->Gsatt("TDGN","SEEN",0); 
899   gMC->Gsatt("TIRC","SEEN",0);
900   gMC->Gsatt("TIC1","SEEN",1);
901   gMC->Gsatt("TIPP","SEEN",0);
902   gMC->Gsatt("TIC3","SEEN",0);
903   gMC->Gsatt("TRCE","SEEN",0);
904   gMC->Gsatt("TPSC","SEEN",0);
905   gMC->Gsatt("TPCC","SEEN",0); 
906   gMC->Gsatt("TORC","SEEN",0);
907   gMC->Gsatt("TOPP","SEEN",0);
908   gMC->Gsatt("TOC3","SEEN",0);
909   gMC->Gsatt("TOC1","SEEN",1);
910   gMC->Gsatt("TSSW","SEEN",1);
911   gMC->Gsatt("TSWC","SEEN",1);
912   gMC->Gsatt("TSSW","COLO",3);
913   gMC->Gsatt("TSWC","COLO",3);
914   gMC->Gsatt("TSCE","COLO",6);
915   gMC->Gsatt("TSCE","SEEN",1);
916   gMC->Gsatt("TWES","SEEN",0);
917   gMC->Gsatt("TSWB","SEEN",0);
918   gMC->Gsatt("TPEL","SEEN",0);
919   gMC->Gsatt("TPMW","SEEN",1);
920   gMC->Gsatt("TESR","SEEN",1);
921   gMC->Gsatt("TPMW","COLO",12);
922   gMC->Gsatt("TIC1","COLO",5);
923   gMC->Gsatt("TOC1","COLO",5);
924   gMC->Gsatt("TESB","SEEN",0);
925   gMC->Gsatt("THVM","SEEN",1);
926   gMC->Gsatt("THVM","COLO",11);
927   gMC->Gsatt("THVH","SEEN",0);
928   gMC->Gsatt("TPSR","SEEN",0); 
929   gMC->Gsatt("THVL","SEEN",0);
930   gMC->Gsatt("THVC","SEEN",0);  
931   gMC->Gsatt("THVE","SEEN",0);
932   gMC->Gsatt("THVR","SEEN",0);
933
934   //
935   gMC->Gdopt("hide", "on");
936   gMC->Gdopt("shad", "on");
937   gMC->Gsatt("*", "fill", 7);
938   gMC->SetClipBox(".");
939   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
940   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
941   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
942   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
943   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
944   gMC->DefaultRange();
945   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
946   gMC->Gdhead(1111, "Time Projection Chamber");
947   gMC->Gdman(18, 4, "MAN");
948   gMC->Gdopt("hide","off");
949 }
950
951 //_____________________________________________________________________________
952 void AliTPCv0::Init()
953 {
954   //
955   // Initialise Time Projection Chamber version 0
956   //
957  
958   printf("%s: *** TPC version 0 initialized***\n",ClassName()); 
959
960   //  printf("TPC version 0 initialized\n");
961 }
962
963 //_____________________________________________________________________________
964 void AliTPCv0::StepManager()
965 {
966   //
967   // Procedure called at each step in the TPC
968   //
969 }