Some of the coding violations corrected
[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.                                    *
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   *
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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     *
12  * about the suitability of this software for any purpose. It is          *
13  * provided "as is" without express or implied warranty.                  *
14  **************************************************************************/
15
16 /* $Id$ */
17
18 //
19 ///////////////////////////////////////////////////////////////////////////////
20 //                                                                           //
21 //  Time Projection Chamber version 1 -- detailed TPC and fast simulation    //
22 //                                                                           // 
23 //Begin_Html
24 /*
25 <img src="picts/AliTPCv1Class.gif">
26 */
27 //End_Html
28 //                                                                           //
29 //                                                                           //
30 ///////////////////////////////////////////////////////////////////////////////
31
32 #include <Riostream.h>
33 #include <stdlib.h>
34 #include <TInterpreter.h>
35 #include <TMath.h>
36 #include <TVirtualMC.h>
37 #include <TString.h>
38 #include <TSystem.h>
39
40 #include "AliConst.h"
41 #include "AliRun.h"
42 #include "AliTPCDigitsArray.h"
43 #include "AliTPCParam.h"
44 #include "AliTPCParamSR.h"
45 #include "AliTPCv1.h"
46 #include "TLorentzVector.h"
47 #include "AliMC.h"
48 #include "TGeoManager.h"
49 #include "TGeoVolume.h"
50 #include "TGeoPcon.h"
51 #include "TGeoTube.h"
52 #include "TGeoPgon.h"
53 #include "TGeoTrd1.h"
54 #include "TGeoCompositeShape.h"
55 #include "TGeoPara.h"
56 ClassImp(AliTPCv1)
57
58 //_____________________________________________________________________________
59
60   AliTPCv1::AliTPCv1():AliTPC(),fIdSens(0)
61 {
62
63   fHitType = 1;
64
65 }
66  
67 //_____________________________________________________________________________
68 AliTPCv1::AliTPCv1(const char *name, const char *title) 
69   :AliTPC(name, title),fIdSens(0)
70  {
71   //
72   // Standard constructor for Time Projection Chamber
73   //
74
75
76   if (fTPCParam)
77      fTPCParam->Write(fTPCParam->GetTitle());
78
79   fHitType=1;
80 }
81
82 //_____________________________________________________________________________
83 void AliTPCv1::CreateGeometry()
84 {
85   //-------------------------------------------------------------
86   // Creates geometry for Time Projection Chamber version 1
87   // Detailed geometry -- Fast simulation - space points
88   // at the pad-rows centers
89   // Origin M.Kowalski, INP Cracow, Marek.Kowalski@ifj.edu.pl
90   //-----------------------------------------------------------
91
92   //Begin_Html
93   /*
94     <img src="picts/AliTPC.gif">
95   */
96   //End_Html
97   //Begin_Html
98   /*
99     <img src="picts/AliTPCv1Tree.gif">
100   */
101   //End_Html
102   //----------------------------------------------------------
103   // This geometry is written using TGeo class
104   // Firstly the shapes are defined, and only then the volumes
105   // What is recognized by the MC are volumes
106   //----------------------------------------------------------
107   //
108   //  tpc - this will be the mother volume
109   //
110
111   //
112   // here I define a volume TPC
113   // retrive the medium name with "TPC_" as a leading string
114   //
115   TGeoPcon *tpc = new TGeoPcon(0.,360.,30); //30 sections
116   //
117   tpc->DefineSection(0,-289.6,77.,278.);
118   tpc->DefineSection(1,-262.1,77.,278.);
119   //
120   tpc->DefineSection(2,-262.1,83.1,278.);
121   tpc->DefineSection(3,-260.,83.1,278.);
122   //
123   tpc->DefineSection(4,-260.,70.,278.);    
124   tpc->DefineSection(5,-259.6,70.,278.);
125   //
126   tpc->DefineSection(6,-259.6,68.1,278.);
127   tpc->DefineSection(7,-253.6,68.1,278.);
128   //
129   tpc->DefineSection(8,-253.6,68.,278.);
130   tpc->DefineSection(9,-74.0,60.8,278.);
131   //
132   tpc->DefineSection(10,-74.0,60.1,278.);
133   tpc->DefineSection(11,-73.3,60.1,278.);
134   //
135   tpc->DefineSection(12,-73.3,56.9,278.); 
136   tpc->DefineSection(13,-68.5,56.9,278.);
137   //
138   tpc->DefineSection(14,-68.5,60.,278.);
139   tpc->DefineSection(15,-64.7,60.,278.);
140   //
141   tpc->DefineSection(16,-64.7,56.9,278.); 
142   tpc->DefineSection(17,73.3,56.9,278.);
143   //
144   tpc->DefineSection(18,73.3,60.1,278.);
145   tpc->DefineSection(19,74.0,60.1,278.);
146   //
147   tpc->DefineSection(20,74.0,60.8,278.);
148   tpc->DefineSection(21,253.6,65.5,278.);
149   //
150   tpc->DefineSection(22,253.6,65.6,278.);
151   tpc->DefineSection(23,259.6,65.6,278.);
152   //
153   tpc->DefineSection(24,259.6,70.0,278.);
154   tpc->DefineSection(25,260.,70.0,278.);
155   //
156   tpc->DefineSection(26,260.,83.1,278.);
157   tpc->DefineSection(27,262.1,83.1,278.);
158   //
159   tpc->DefineSection(28,262.1,77.,278);
160   tpc->DefineSection(29,289.6,77.,278.);
161
162
163   //
164   TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
165   TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
166   //
167   // drift volume - sensitive volume, extended beyond the
168   // endcaps, because of the alignment
169   //
170   TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
171   dvol->DefineSection(0,-260.,74.5,264.4);
172   dvol->DefineSection(1,-253.6,74.5,264.4);
173   //
174   dvol->DefineSection(2,-253.6,76.6774,258.);
175   dvol->DefineSection(3,253.6,76.6774,258.); 
176   //
177   dvol->DefineSection(4,253.6,74.5,264.4);
178   dvol->DefineSection(5,260.,74.5,264.4);
179   //
180   TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-1");
181   TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
182   //
183   //
184   v1->AddNode(v9,1);
185   //
186   // outer insulator
187   //
188   TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
189   //
190   tpco->DefineSection(0,-256.6,264.8,278.);
191   tpco->DefineSection(1,-253.6,264.8,278.);
192   //
193   tpco->DefineSection(2,-253.6,258.,278.);
194   tpco->DefineSection(3,250.6,258.,278.);
195   //
196   tpco->DefineSection(4,250.6,258.,275.5);
197   tpco->DefineSection(5,253.6,258.,275.5);
198   //
199   TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
200   TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
201   //
202   // outer containment vessel
203   //
204   TGeoPcon *tocv = new TGeoPcon(0.,360.,6);  // containment vessel
205   //
206   tocv->DefineSection(0,-256.6,264.8,278.);
207   tocv->DefineSection(1,-253.6,264.8,278.);
208   //
209   tocv->DefineSection(2,-253.6,274.8124,278.);
210   tocv->DefineSection(3,247.6,274.8124,278.);  
211   //
212   tocv->DefineSection(4,247.6,270.4,278.);
213   tocv->DefineSection(5,250.6,270.4,278.);
214   //
215   TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
216   TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3); 
217   //
218   TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
219   TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
220   TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
221   TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
222   //
223   TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
224   TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
225   TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
226   TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
227   //
228   TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
229   TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
230   TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
231   TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
232
233   //-------------------------------------------------------
234   //  Tpc Outer Field Cage
235   //  daughters - composite (sandwich)
236   //-------------------------------------------------------
237
238   TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
239   //
240   tofc->DefineSection(0,-253.6,258.,269.6);
241   tofc->DefineSection(1,-250.6,258.,269.6);
242   //
243   tofc->DefineSection(2,-250.6,258.,260.0676); 
244   tofc->DefineSection(3,250.6,258.,260.0676);
245   //
246   tofc->DefineSection(4,250.6,258.,275.5);
247   tofc->DefineSection(5,253.6,258.,275.5);
248   //
249   TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3); 
250   //sandwich
251   TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
252   TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
253   TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
254   //
255   TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
256   //
257   TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
258   TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
259   TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
260   //
261   // outer part - positioning
262   //
263   tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
264   //
265   tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
266   //
267   v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
268   //
269   v2->AddNode(v3,1); v2->AddNode(v4,1); 
270   //
271   v1->AddNode(v2,1);
272   //--------------------------------------------------------------------
273   // Tpc Inner INsulator (CO2) 
274   // the cones, the central drum and the inner f.c. sandwich with a piece
275   // of the flane will be placed in the TPC
276   //--------------------------------------------------------------------
277   TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
278   //
279   tpci->DefineSection(0,-253.6,68.4,76.6774);
280   tpci->DefineSection(1,-74.0,61.2,76.6774);
281   //
282   tpci->DefineSection(2,74.0,61.2,76.6774);  
283   //
284   tpci->DefineSection(3,253.6,65.9,76.6774);
285   //
286   TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
287   //
288   // now the inner field cage - only part of flanges (2 copies)
289   //
290   TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5); 
291   TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
292   //
293  //---------------------------------------------------------
294   // Tpc Inner Containment vessel - Muon side
295   //---------------------------------------------------------
296   TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
297   //
298   tcms->DefineSection(0,-259.1,68.1,74.2);
299   tcms->DefineSection(1,-253.6,68.1,74.2);
300   //
301   tcms->DefineSection(2,-253.6,68.1,68.4);
302   tcms->DefineSection(3,-74.0,60.9,61.2);
303   //
304   tcms->DefineSection(4,-74.0,60.1,61.2);
305   tcms->DefineSection(5,-73.3,60.1,61.2);
306   //
307   tcms->DefineSection(6,-73.3,56.9,61.2);
308   tcms->DefineSection(7,-73.0,56.9,61.2);
309   //
310   tcms->DefineSection(8,-73.0,56.9,58.8);
311   tcms->DefineSection(9,-71.3,56.9,58.8);
312   //
313   TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
314   //-----------------------------------------------
315   // inner containment vessel - shaft side
316   //-----------------------------------------------
317   TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
318   //
319   tcss->DefineSection(0,71.3,56.9,58.8);
320   tcss->DefineSection(1,73.0,56.9,58.8);
321   //
322   tcss->DefineSection(2,73.0,56.9,61.2);
323   tcss->DefineSection(3,73.3,56.9,61.2);
324   //  
325   tcss->DefineSection(4,73.3,60.1,61.2);
326   tcss->DefineSection(5,74.0,60.1,61.2);
327   //
328   tcss->DefineSection(6,74.0,60.9,61.2);
329   tcss->DefineSection(7,253.6,65.6,65.9);
330   //
331   tcss->DefineSection(8,253.6,65.6,74.2);
332   tcss->DefineSection(9,258.1,65.6,74.2);
333   //
334   TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
335   //-----------------------------------------------
336   //  Inner field cage
337   //  define 4 parts and make an assembly
338   //-----------------------------------------------
339   // part1 - Al - 2 copies
340   TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
341   TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
342   // sandwich - outermost parts - 2 copies
343   TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
344   TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
345   TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
346   TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
347   //
348   TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
349   TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
350   TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
351   TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
352   //
353   // middle parts - 2 copies
354   TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
355   TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
356   TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
357   TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
358   //
359   TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
360   TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
361   TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
362   TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
363   // central part - 1 copy
364   TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns 
365   TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
366   TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
367   //
368   TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
369   TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
370   TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
371   //
372   // inner part - positioning
373   //
374   // creating a sandwich
375   tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
376   //
377   tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
378   //
379   tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
380   //
381   TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
382   //
383   tv100->AddNode(tv10,1);
384   tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
385   tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
386   tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
387   tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
388   tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
389   tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
390   //
391   v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
392   v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
393   v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1); 
394   v9->AddNode(tv100,1);
395   //
396   // central drum 
397   //
398   // flange + sandwich
399   //
400   TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
401   cfl->DefineSection(0,-71.1,59.7,61.2);
402   cfl->DefineSection(1,-68.6,59.7,61.2);
403   //
404   cfl->DefineSection(2,-68.6,60.6324,61.2);
405   cfl->DefineSection(3,68.6,60.6324,61.2); 
406   //
407   cfl->DefineSection(4,68.6,59.7,61.2);
408   cfl->DefineSection(5,71.1,59.7,61.2);  
409   //
410   TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
411   // sandwich
412   TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
413   TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
414   TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);  
415   //
416   TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
417   TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
418   TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
419   TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
420   //
421   // seals for central drum 2 copies
422   //
423   TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
424   TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
425   TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
426   v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
427   v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
428   //
429   // seal collars 
430   TGeoPcon *se = new TGeoPcon(0.,360.,6);
431   se->DefineSection(0,-72.8,59.7,61.2);
432   se->DefineSection(1,-72.3,59.7,61.2);
433   //
434   se->DefineSection(2,-72.3,58.85,61.2);
435   se->DefineSection(3,-71.6,58.85,61.2); 
436   //
437   se->DefineSection(4,-71.6,59.7,61.2);
438   se->DefineSection(5,-71.3,59.7,61.2);  
439   //
440   TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
441   //
442   TGeoTube *si = new TGeoTube(56.9,58.8,1.); 
443   TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
444   //
445   // define reflection matrix 
446   //
447   TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
448   //
449   cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
450   //
451   v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
452   v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
453   v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
454   //
455   // central membrane - 2 rings and a mylar membrane - assembly
456   //
457   TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
458   TGeoTube *oh = new TGeoTube(250.,256.,.5);
459   TGeoTube *mem = new TGeoTube(84.05,250,0.01);
460   TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
461   TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
462   TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
463   //
464   TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
465   cm->AddNode(ihv,1);
466   cm->AddNode(ohv,1);
467   cm->AddNode(memv,1);
468   v9->AddNode(cm,1);
469   //
470   // end caps - they are make as an assembly of single segments
471   // containing both readout chambers
472   //
473   Double_t openingAngle = 10.*TMath::DegToRad();
474   Double_t thick=1.5; // rib
475   Double_t shift = thick/TMath::Sin(openingAngle);
476   //
477   Double_t lowEdge = 86.3; // hole in the wheel
478   Double_t upEdge = 240.4; // hole in the wheel
479   //
480   new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
481   //
482   TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
483   //
484   hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
485   hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
486   //
487   hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
488   hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
489   //
490   Double_t ys = shift*TMath::Sin(openingAngle); 
491   Double_t xs = shift*TMath::Cos(openingAngle);
492   TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);  
493   tr->RegisterYourself();
494   TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
495   TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
496   TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
497   bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
498   bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
499   TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
500   TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
501   //
502   ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
503   //
504   // readout chambers
505   //
506   // IROC first
507   //
508    TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
509    TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
510   // empty space
511    TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
512    TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
513    ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
514    //bars
515    Double_t tga = (19.8328-12.3742)/39.3;
516    Double_t xmin,xmax;
517    xmin = 9.55*tga+12.3742;
518    xmax = 9.95*tga+12.3742;
519    TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
520    TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
521    empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
522    xmin=19.4*tga+12.3742;
523    xmax=19.9*tga+12.3742;
524    TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
525    TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
526    empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
527    xmin=29.35*tga+12.3742;
528    xmax=29.75*tga+12.3742;
529    TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2); 
530    TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);    
531    empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
532    //
533    // holes for connectors
534    //
535    TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
536    TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
537    TString fileName(gSystem->Getenv("ALICE_ROOT"));
538    fileName += "/TPC/conn_iroc.dat";
539    ifstream in;
540    in.open(fileName.Data(), ios_base::in); // asci file
541    for(Int_t i =0;i<86;i++){
542       Double_t y = 3.99;
543       Double_t x,z,ang;
544       in>>x>>z>>ang;
545       z-=26.5;
546       TGeoRotation *rrr = new TGeoRotation();
547       rrr->RotateY(ang);
548       TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
549       ibdv->AddNode(connv,i+1,trans);
550    }
551    in.close();
552    // "cap"
553    new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
554    // "hole"
555    new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
556    TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);  
557    tr1->RegisterYourself();
558    TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
559    TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
560    //
561    // pad plane and wire fixations
562    //
563    TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
564    TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
565    TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
566    TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
567    TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
568    TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
569    TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
570    //
571    TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
572    //
573    iroc->AddNode(ibdv,1);
574    iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
575    iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
576    tga =(23.3521-14.5974)/49.65; 
577    Double_t xx = 24.825*tga+14.5974-0.6;
578    iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
579    iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
580    //
581    // OROC
582    //
583    TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
584    TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
585    TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
586    TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
587    obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
588    //horizontal bars
589    tga=(38.5084-20.2938)/99.3;
590    xmin=tga*10.2+20.2938;
591    xmax=tga*10.6+20.2938;
592    TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
593    TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
594    //
595    xmin=22.55*tga+20.2938;
596    xmax=24.15*tga+20.2938;
597    TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
598    TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
599    //
600    xmin=36.1*tga+20.2938;
601    xmax=36.5*tga+20.2938;
602    TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
603    TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
604    //
605    xmin=49.0*tga+20.2938;
606    xmax=50.6*tga+20.2938;   
607    TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
608    TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
609    //
610    xmin=63.6*tga+20.2938;
611    xmax=64.0*tga+20.2938;
612    TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
613    TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
614    //
615    xmin=75.5*tga+20.2938;
616    xmax=77.15*tga+20.2938;
617    TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
618    TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
619    //
620    xmin=88.7*tga+20.2938;
621    xmax=89.1*tga+20.2938;
622    TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
623    TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
624    //
625    oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
626    oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
627    oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
628    oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
629    oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
630    oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
631    oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
632    // vertical bars
633    TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1); 
634    TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
635    TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
636    TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
637    TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
638    //
639    TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
640    TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
641    TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
642    TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
643    TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
644    //
645    oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
646    oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
647    oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
648    oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
649    oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
650    oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
651    oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
652    oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
653    //
654    // holes for connectors
655    //
656    fileName = gSystem->Getenv("ALICE_ROOT");
657    fileName += "/TPC/conn_oroc.dat";
658    in.open(fileName.Data(), ios_base::in); // asci file
659    for(Int_t i =0;i<78;i++){
660       Double_t y =3.89;
661       Double_t x,z,ang;
662       Double_t x1,z1,x2,z2;
663       in>>x>>z>>ang;        
664       Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
665       Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
666       //
667       x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;      
668       //
669       TGeoRotation *rr = new TGeoRotation();
670       rr->RotateY(ang); 
671       z1-=54.95;
672       z2-=54.95;
673       TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
674       TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
675       obdv->AddNode(connv,i+1,trans1);
676       obdv->AddNode(connv,i+79,trans2);
677    }
678    in.close();
679    // cap
680    new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
681    new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
682    TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
683    tr5->RegisterYourself();
684    TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
685    TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
686    //
687    // pad plane and wire fixations
688    //
689    TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
690    TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
691    //
692    tga=(43.5239-23.3874)/114.2;
693    TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
694    TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);  
695    xx = 57.1*tga+23.3874-0.7;
696    TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
697    TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
698    //
699    TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
700    //
701    oroc->AddNode(obdv,1);
702    oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
703    oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
704    oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
705    oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
706    // 
707    // now iroc and oroc are placed into a sector...
708    //
709    TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
710    TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
711    TGeoRotation rot1("rot1",90.,90.,0.);
712    TGeoRotation rot2("rot2");
713    rot2.RotateY(10.);
714    TGeoRotation *rot = new TGeoRotation("rot");
715    *rot=rot1*rot2;
716    //
717    Double_t x0,y0;
718    x0=110.2*TMath::Cos(openingAngle);
719    y0=110.2*TMath::Sin(openingAngle);
720    TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side 
721    TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
722    x0=188.45*TMath::Cos(openingAngle);
723    y0=188.45*TMath::Sin(openingAngle);
724    TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
725    TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
726    //
727    // A-side
728    //
729    secta->AddNode(ch,1);
730    secta->AddNode(iroc,1,combi1a);
731    secta->AddNode(oroc,1,combi2a);
732    //
733    // C-side
734    //
735    sectc->AddNode(ch,1);
736    sectc->AddNode(iroc,1,combi1c);
737    sectc->AddNode(oroc,1,combi2c);
738    //
739    // now I try to make  wheels...
740    //
741    TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
742    TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
743    //
744    for(Int_t i =0;i<18;i++){
745      Double_t phi = (20.*i);
746      TGeoRotation *r = new TGeoRotation();
747      r->RotateZ(phi);
748      wheela->AddNode(secta,i+1,r);
749      wheelc->AddNode(sectc,i+1,r); 
750     
751    }
752    // wheels in the drift volume!
753    TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
754    v9->AddNode(wheela,1,combi3);
755    v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
756    
757    //_____________________________________________________________
758    // service support wheel
759    //_____________________________________________________________
760   TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
761   sw->DefineSection(0,-4.,80.5,251.75);
762   sw->DefineSection(1,4.,80.5,251.75); 
763   TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
764   //
765   thick=1.;
766   shift = thick/TMath::Sin(openingAngle);
767   TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
768   sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
769   sh->DefineSection(1,4.,81.5-shift,250.75-shift);
770   TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
771   //
772   TGeoMedium *m9 =  gGeoManager->GetMedium("TPC_Si"); 
773   TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
774   el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
775   el->DefineSection(1,1.872,81.5-shift,250.75-shift);
776   TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si 
777   //
778   shv->AddNode(elv,1);
779   //
780   //
781   ys = shift*TMath::Sin(openingAngle);
782   xs = shift*TMath::Cos(openingAngle);
783   swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
784   // cover
785   TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
786   co->DefineSection(0,-0.5,77.,255.25);
787   co->DefineSection(1,0.5,77.,255.25);
788   TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
789   // hole in a cover
790   TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
791   shift=4./TMath::Sin(openingAngle);
792   coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
793   coh->DefineSection(1,0.5,85.-shift,247.25-shift);  
794   //
795   TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
796   //
797   ys = shift*TMath::Sin(openingAngle);
798   xs = shift*TMath::Cos(openingAngle);  
799   cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
800   //
801   // Sector as an Assembly
802   //
803   TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
804   swhs->AddNode(swv,1);
805   swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
806   swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
807   //
808   // SSW as an Assembly of sectors
809   //
810  TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
811    for(Int_t i =0;i<18;i++){
812      Double_t phi = (20.*i);
813      TGeoRotation *r = new TGeoRotation();
814      r->RotateZ(phi);
815      swheel->AddNode(swhs,i+1,r);   
816    }
817    v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
818    v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
819
820    // sensitive strips 
821    TGeoMedium *m8 = gGeoManager->GetMedium("TPC_Ne-CO2-2");
822    Int_t totrows;
823    totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
824    Double_t *upar;
825    upar=NULL;
826    gGeoManager->Volume("TPC_Strip","PGON",m8->GetId(),upar);
827    upar=new Double_t [10];
828    upar[0]=0.;
829    upar[1]=360.;
830    upar[2]=18.;
831    upar[3]=2.;
832    //
833    upar[4]=-124.8;
834    upar[7]=124.8;
835
836    Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
837
838    upar[5]=rlow;
839    upar[6]=rlow+.01;
840    upar[8]=upar[5];
841    upar[9]=upar[6];
842    //
843    gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
844    gGeoManager->Node("TPC_Strip",totrows+1,
845                      "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
846    //
847    // now, strips 
848    //
849      //lower sectors
850      for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
851        rlow=fTPCParam->GetPadRowRadiiLow(i-1);
852        upar[5]=rlow;
853        upar[6]=rlow+.01;
854        upar[8]=upar[5];
855        upar[9]=upar[6];
856        gGeoManager->Node("TPC_Strip",i,
857                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
858        gGeoManager->Node("TPC_Strip",totrows+i,
859                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);       
860      }
861      //upper sectors
862      for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
863        rlow=fTPCParam->GetPadRowRadiiUp(i-1); 
864        upar[5]=rlow;
865        upar[6]=rlow+.01;
866        upar[8]=upar[5];
867        upar[9]=upar[6];
868        gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
869                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10); 
870        gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
871                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10); 
872      }
873    
874   //----------------------------------------------------------
875   // TPc Support Rods - MAKROLON
876   //----------------------------------------------------------
877   TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
878   TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
879   TGeoMedium *m10 =  gGeoManager->GetMedium("TPC_Alumina");
880   TGeoMedium *m11 =  gGeoManager->GetMedium("TPC_Peek");
881   TGeoMedium *m12 =  gGeoManager->GetMedium("TPC_Water");
882   // upper and lower rods differ in length!
883   delete [] upar;
884   upar=NULL;
885   gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
886   upar=new Double_t [3];
887   upar[0]=1.8;
888   upar[1]=2.2;
889   
890   //
891   //HV rods - makrolon + 0.58cm (diameter) Cu
892   TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
893   TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
894   //
895   TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
896   TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
897   hvrv->AddNode(hvcv,1);
898   //
899   // resistor rods
900   //
901   TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner 
902   TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer 
903   TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
904   TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
905   //
906   TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
907   TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);    
908   TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
909   TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);   
910   //
911   // ceramic rod with water
912   //
913   criv->AddNode(cwiv,1); 
914   crov->AddNode(cwov,1);
915   //
916   TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner 
917   TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer    
918   //
919   // peek rod
920   //
921   TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
922   TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12); 
923   //
924   // resistor rods assembly
925   //
926    TGeoRotation *rotr = new TGeoRotation("rotr");
927    rotr->RotateZ(-21.);
928   //
929   TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
930   TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
931   //
932   TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
933   TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);  
934   //
935   //
936   TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
937   TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
938   rrin->AddNode(rriv,1);
939   rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
940   rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.)); 
941   rrin->AddNode(priv,1); 
942   //
943   rrou->AddNode(rrov,1);
944   rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
945   rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.)); 
946   rrou->AddNode(prov,1);   
947   for(Int_t i=0;i<18;i++){
948     Double_t angle,x,y;
949     Double_t z,r; 
950     angle=TMath::DegToRad()*20.*(Double_t)i;
951     r=81.5;
952     x=r * TMath::Cos(angle);
953     y=r * TMath::Sin(angle);
954     upar[2]=126.64; //lower
955     z= 126.96;
956     if(i==3){
957       v9->AddNode(rrin,1,new TGeoCombiTrans(x,y,z,rotr)); //A
958       v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z,rotr)); //C     
959     } 
960     else { 
961       gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
962       gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
963     }
964
965     //
966     r=254.25;
967     x=r * TMath::Cos(angle);
968     y=r * TMath::Sin(angle);
969     upar[2]=126.54; //upper
970     z=127.06;
971     //
972     if(i==15){
973       //v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
974      v9->AddNode(hvrv,1,new TGeoTranslation(x,y,127.14));//A-side only
975       gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
976     }
977     else if(i==11){
978       v9->AddNode(rrou,1,new TGeoCombiTrans(x,y,z,rotr)); //A
979       v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z,rotr)); //C
980     }
981     else{
982     //
983       gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
984       gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
985     }
986     gGeoManager->Node("TPC_Rod",i+36,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
987     gGeoManager->Node("TPC_Rod",i+54,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
988   }
989
990   TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
991   alice->AddNode(v1,1);
992
993 } // end of function
994
995
996 //_____________________________________________________________________________
997 void AliTPCv1::CreateMaterials()
998 {
999   //
1000   // Define materials for Time Projection Chamber
1001   //
1002   AliTPC::CreateMaterials();
1003 }
1004
1005 //_____________________________________________________________________________
1006 void AliTPCv1::Init()
1007 {
1008   //
1009   // Initialises TPC detector after it has been created
1010   //
1011
1012   fIdSens=gMC->VolId("TPC_Strip"); // sensitive strip
1013
1014   printf("%s: *** TPC version 1 initialized***\n",ClassName());
1015
1016   // printf("TPC version 1 initialized\n");
1017 }
1018
1019 //_____________________________________________________________________________
1020 void AliTPCv1::StepManager()
1021 {
1022   //
1023   // Called at every step in the Time Projection Chamber
1024   //
1025   Int_t         copy, id, i;
1026   Float_t       hits[5];
1027   Int_t         vol[2];
1028   TLorentzVector p;
1029  //
1030
1031   id = gMC->CurrentVolID(copy);
1032   if(id!=fIdSens) return;
1033   if(gMC->TrackCharge() && gMC->IsTrackEntering()) {
1034
1035     // 
1036     // Only charged tracks entering the sensitive volume
1037     //
1038
1039       gMC->TrackPosition(p);
1040   Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1041   //
1042   
1043   //
1044   Double_t angle = TMath::ACos(p[0]/r);  
1045   angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1046   //
1047   // angular segment, it is not a real sector number...
1048   //
1049   Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1050                fTPCParam->GetInnerAngle());
1051   // rotate to segment "0"
1052   Float_t cos,sin;
1053   fTPCParam->AdjustCosSin(sector,cos,sin);
1054   Float_t x1 = p[0]*cos + p[1]*sin;
1055   Float_t y1 = TMath::Abs(-p[0]*sin + p[1]*cos);
1056   // calculate real sector number...
1057   if (x1>fTPCParam->GetOuterRadiusLow()){
1058     sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1059              fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1060     if (p[2]<0)         sector+=(fTPCParam->GetNOuterSector()>>1);
1061   }
1062     else   
1063       if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1); 
1064   //
1065   // here I have a sector number
1066   //
1067   vol[0]=sector;
1068   //
1069   Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1070   vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1071   // row numbers are autonomous for lower and upper sectors
1072   if(vol[0] > fTPCParam->GetNInnerSector()) {
1073      vol[1] -= fTPCParam->GetNRowLow();
1074   }
1075   Double_t range = (sector<36) ? fTPCParam->GetYInner(vol[1]) :
1076                    fTPCParam->GetYOuter(vol[1]);
1077   if(y1>range) return;
1078      if(vol[1] == 0){
1079   
1080         // because Jouri wants to have this
1081
1082         gMC->TrackMomentum(p);
1083         hits[0]=p[0];
1084         hits[1]=p[1];
1085         hits[2]=p[2];
1086         hits[3]=0.; // this hit has no energy loss
1087         // Get also the track time for pileup simulation
1088         hits[4]=gMC->TrackTime();
1089
1090         AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); // M.I.
1091      }
1092    gMC->TrackPosition(p);
1093       for(i=0;i<3;++i) hits[i]=p[i];
1094       hits[3]=1; //I'd like to have something positive here (I.Belikov)
1095       // Get also the track time for pileup simulation
1096       hits[4]=gMC->TrackTime();
1097
1098       AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits); // M.I.    
1099
1100   }// track entering sensitive strip
1101    
1102 }
1103 //_____________________________________________________________________________
1104
1105
1106