Adding simple example to load default debug streamer
[u/mrichter/AliRoot.git] / TPC / AliTPCv1.cxx
1 /**************************************************************************
2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3  *                                                                        *
4  * Author: The ALICE Off-line Project.                                    *
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10  * copies and that both the copyright notice and this permission notice   *
11  * appear in the supporting documentation. The authors make no claims     *
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13  * provided "as is" without express or implied warranty.                  *
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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()
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