4a910d7a1a01ab92725685738d9901dcc4150276
[u/mrichter/AliRoot.git] / TPC / AliTPCv2.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 2 -- detailed TPC and slow simulation    //
22 //                                                                           //
23 //Begin_Html
24 /*
25 <img src="picts/AliTPCv2Class.gif">
26 */
27 //End_Html
28 //                                                                           //
29 //                                                                           //
30 ///////////////////////////////////////////////////////////////////////////////
31
32 //#include <stdlib.h>
33
34 #include <TLorentzVector.h>
35 #include <TPDGCode.h>
36 #include <TString.h>
37 #include "AliLog.h"
38 #include "AliMathBase.h"
39 #include "AliTrackReference.h"
40 #include "AliTPCParam.h"
41 #include "AliTPCTrackHitsV2.h"
42 #include "AliTPCv2.h"
43 #include "AliGeomManager.h"
44 #include "TGeoVolume.h"
45 #include "TGeoPcon.h"
46 #include "TGeoTube.h"
47 #include "TGeoPgon.h"
48 #include "TGeoTrd1.h"
49 #include "TGeoCompositeShape.h"
50 #include "TGeoPara.h"
51 #include "TGeoPhysicalNode.h"
52
53 ClassImp(AliTPCv2)
54  
55 //_____________________________________________________________________________
56 AliTPCv2::AliTPCv2(const char *name, const char *title) :
57   AliTPC(name, title),
58   fIdSens(0),
59   fIDrift(0),
60   fSecOld(0) 
61 {
62   //
63   // Standard constructor for Time Projection Chamber version 2
64   //
65
66
67   SetBufferSize(128000);
68
69
70 //   if (fTPCParam)
71 //      fTPCParam->Write(fTPCParam->GetTitle());
72 }
73  
74 //_____________________________________________________________________________
75 void AliTPCv2::CreateGeometry()
76 {
77   //
78   // Create the geometry of Time Projection Chamber version 2
79   //
80   //Begin_Html
81   /*
82     <img src="picts/AliTPC.gif">
83   */
84   //End_Html
85   //Begin_Html
86   /*
87     <img src="picts/AliTPCv2Tree.gif">
88   */
89   //End_Html
90
91   //----------------------------------------------------------
92   // This geometry is written using TGeo class
93   // Firstly the shapes are defined, and only then the volumes
94   // What is recognized by the MC are volumes
95   //----------------------------------------------------------
96   //
97   //  tpc - this will be the mother volume
98   //
99
100   //
101   // here I define a volume TPC
102   // retrive the medium name with "TPC_" as a leading string
103   //
104   TGeoPcon *tpc = new TGeoPcon(0.,360.,20); //20 sections
105   //
106   tpc->DefineSection(0,-291.,77.,278.);
107   tpc->DefineSection(1,-270,77.,278.);
108   //
109   tpc->DefineSection(2,-270.,77.,278.);
110   tpc->DefineSection(3,-259.6,70.,278.);
111   //
112   tpc->DefineSection(4,-259.6,68.1,278.);
113   tpc->DefineSection(5,-253.6,68.1,278.);
114   //
115   tpc->DefineSection(6,-253.6,68.,278.);
116   tpc->DefineSection(7,-74.0,60.8,278.);
117   //
118   tpc->DefineSection(8,-74.0,60.1,278.);
119   tpc->DefineSection(9,-73.3,60.1,278.);
120   //
121   tpc->DefineSection(10,-73.3,56.9,278.); 
122   tpc->DefineSection(11,73.3,56.9,278.);
123   //
124   tpc->DefineSection(12,73.3,60.1,278.);
125   tpc->DefineSection(13,74.0,60.1,278.);
126   //
127   tpc->DefineSection(14,74.0,60.8,278.);
128   tpc->DefineSection(15,253.6,65.5,278.);
129   //
130   tpc->DefineSection(16,253.6,65.6,278.);
131   tpc->DefineSection(17,259.6,65.6,278.);
132   //
133   tpc->DefineSection(18,259.6,70.0,278.);
134   tpc->DefineSection(19,291.,77.,278.);
135   //
136   TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
137   TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
138   //
139   // drift volume - sensitive volume, extended beyond the
140   // endcaps, because of the alignment
141   //
142   TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
143   dvol->DefineSection(0,-260.,74.5,264.4);
144   dvol->DefineSection(1,-253.6,74.5,264.4);
145   //
146   dvol->DefineSection(2,-253.6,76.6774,258.);
147   dvol->DefineSection(3,253.6,76.6774,258.); 
148   //
149   dvol->DefineSection(4,253.6,74.5,264.4);
150   dvol->DefineSection(5,260.,74.5,264.4);
151   //
152   TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-2");
153   TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
154   //
155   v1->AddNode(v9,1);
156   //
157   // outer insulator
158   //
159   TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
160   //
161   tpco->DefineSection(0,-256.6,264.8,278.);
162   tpco->DefineSection(1,-253.6,264.8,278.);
163   //
164   tpco->DefineSection(2,-253.6,258.,278.);
165   tpco->DefineSection(3,250.6,258.,278.);
166   //
167   tpco->DefineSection(4,250.6,258.,275.5);
168   tpco->DefineSection(5,253.6,258.,275.5);
169   //
170   TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
171   TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
172   //
173   // outer containment vessel
174   //
175   TGeoPcon *tocv = new TGeoPcon(0.,360.,6);  // containment vessel
176   //
177   tocv->DefineSection(0,-256.6,264.8,278.);
178   tocv->DefineSection(1,-253.6,264.8,278.);
179   //
180   tocv->DefineSection(2,-253.6,274.8124,278.);
181   tocv->DefineSection(3,247.6,274.8124,278.);  
182   //
183   tocv->DefineSection(4,247.6,270.4,278.);
184   tocv->DefineSection(5,250.6,270.4,278.);
185   //
186   TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
187   TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3); 
188   //
189   TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
190   TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
191   TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
192   TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
193   //
194   TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
195   TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
196   TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
197   TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
198   //
199   TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
200   TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
201   TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
202   TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
203  //-------------------------------------------------------
204   //  Tpc Outer Field Cage
205   //  daughters - composite (sandwich)
206   //-------------------------------------------------------
207
208   TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
209   //
210   tofc->DefineSection(0,-253.6,258.,269.6);
211   tofc->DefineSection(1,-250.6,258.,269.6);
212   //
213   tofc->DefineSection(2,-250.6,258.,260.0676); 
214   tofc->DefineSection(3,250.6,258.,260.0676);
215   //
216   tofc->DefineSection(4,250.6,258.,275.5);
217   tofc->DefineSection(5,253.6,258.,275.5);
218   //
219   TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3); 
220   //sandwich
221   TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
222   TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
223   TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
224   //
225   TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
226   //
227   TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
228   TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
229   TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
230   //
231   // outer part - positioning
232   //
233   tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
234   //
235   tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
236   //
237   v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
238   //
239   v2->AddNode(v3,1); v2->AddNode(v4,1); 
240   //
241   v1->AddNode(v2,1);
242   //--------------------------------------------------------------------
243   // Tpc Inner INsulator (CO2) 
244   // the cones, the central drum and the inner f.c. sandwich with a piece
245   // of the flane will be placed in the TPC
246   //--------------------------------------------------------------------
247   TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
248   //
249   tpci->DefineSection(0,-253.6,68.4,76.6774);
250   tpci->DefineSection(1,-74.0,61.2,76.6774);
251   //
252   tpci->DefineSection(2,74.0,61.2,76.6774);  
253   //
254   tpci->DefineSection(3,253.6,65.9,76.6774);
255   //
256   TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
257   //
258   // now the inner field cage - only part of flanges (2 copies)
259   //
260   TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5); 
261   TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
262   //
263  //---------------------------------------------------------
264   // Tpc Inner Containment vessel - Muon side
265   //---------------------------------------------------------
266   TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
267   //
268   tcms->DefineSection(0,-259.1,68.1,74.2);
269   tcms->DefineSection(1,-253.6,68.1,74.2);
270   //
271   tcms->DefineSection(2,-253.6,68.1,68.4);
272   tcms->DefineSection(3,-74.0,60.9,61.2);
273   //
274   tcms->DefineSection(4,-74.0,60.1,61.2);
275   tcms->DefineSection(5,-73.3,60.1,61.2);
276   //
277   tcms->DefineSection(6,-73.3,56.9,61.2);
278   tcms->DefineSection(7,-73.0,56.9,61.2);
279   //
280   tcms->DefineSection(8,-73.0,56.9,58.8);
281   tcms->DefineSection(9,-71.3,56.9,58.8);
282   //
283   TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
284   //-----------------------------------------------
285   // inner containment vessel - shaft side
286   //-----------------------------------------------
287   TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
288   //
289   tcss->DefineSection(0,71.3,56.9,58.8);
290   tcss->DefineSection(1,73.0,56.9,58.8);
291   //
292   tcss->DefineSection(2,73.0,56.9,61.2);
293   tcss->DefineSection(3,73.3,56.9,61.2);
294   //  
295   tcss->DefineSection(4,73.3,60.1,61.2);
296   tcss->DefineSection(5,74.0,60.1,61.2);
297   //
298   tcss->DefineSection(6,74.0,60.9,61.2);
299   tcss->DefineSection(7,253.6,65.6,65.9);
300   //
301   tcss->DefineSection(8,253.6,65.6,74.2);
302   tcss->DefineSection(9,258.1,65.6,74.2);
303   //
304   TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
305   //-----------------------------------------------
306   //  Inner field cage
307   //  define 4 parts and make an assembly
308   //-----------------------------------------------
309   // part1 - Al - 2 copies
310   TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
311   TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
312   // sandwich - outermost parts - 2 copies
313   TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
314   TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
315   TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
316   TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
317   //
318   TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
319   TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
320   TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
321   TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
322   //
323   // middle parts - 2 copies
324   TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
325   TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
326   TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
327   TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
328   //
329   TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
330   TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
331   TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
332   TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
333   // central part - 1 copy
334   TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns 
335   TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
336   TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
337   //
338   TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
339   TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
340   TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
341   //
342   // inner part - positioning
343   //
344   // creating a sandwich
345   tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
346   //
347   tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
348   //
349   tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
350   //
351   TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
352   //
353   tv100->AddNode(tv10,1);
354   tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
355   tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
356   tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
357   tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
358   tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
359   tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
360   //
361   v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
362   v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
363   v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1); 
364   v9->AddNode(tv100,1);
365   //
366   // central drum 
367   //
368   // flange + sandwich
369   //
370   TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
371   cfl->DefineSection(0,-71.1,59.7,61.2);
372   cfl->DefineSection(1,-68.6,59.7,61.2);
373   //
374   cfl->DefineSection(2,-68.6,60.6324,61.2);
375   cfl->DefineSection(3,68.6,60.6324,61.2); 
376   //
377   cfl->DefineSection(4,68.6,59.7,61.2);
378   cfl->DefineSection(5,71.1,59.7,61.2);  
379   //
380   TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
381   // sandwich
382   TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
383   TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
384   TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);  
385   //
386   TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
387   TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
388   TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
389   TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
390   //
391   // seals for central drum 2 copies
392   //
393   TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
394   TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
395   TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
396   v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.2));
397   v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.2));
398   //
399   // seal collars 
400   TGeoPcon *se = new TGeoPcon(0.,360.,6);
401   se->DefineSection(0,-72.8,59.7,61.2);
402   se->DefineSection(1,-72.3,59.7,61.2);
403   //
404   se->DefineSection(2,-72.3,58.85,61.2);
405   se->DefineSection(3,-71.6,58.85,61.2); 
406   //
407   se->DefineSection(4,-71.6,59.7,61.2);
408   se->DefineSection(5,-71.3,59.7,61.2);  
409   //
410   TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
411   //
412   TGeoTube *si = new TGeoTube(56.9,58.8,1.); 
413   TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
414   //
415   // define reflection matrix 
416   //
417   TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
418   //
419   cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
420   //
421   v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
422   v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
423   v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
424   //
425   // central membrane - 2 rings and a mylar membrane - assembly
426   //
427   TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
428   TGeoTube *oh = new TGeoTube(250.,256.,.5);
429   TGeoTube *mem = new TGeoTube(84.05,250,0.01);
430   TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
431   TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
432   TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
433   //
434   TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
435   cm->AddNode(ihv,1);
436   cm->AddNode(ohv,1);
437   cm->AddNode(memv,1);
438   v9->AddNode(cm,1);
439   //
440   // end caps - they are make as an assembly of single segments
441   // containing both readout chambers
442   //
443   Double_t openingAngle = 10.*TMath::DegToRad();
444   Double_t thick=1.5; // rib
445   Double_t shift = thick/TMath::Sin(openingAngle);
446   //
447   Double_t lowEdge = 86.3; // hole in the wheel
448   Double_t upEdge = 240.4; // hole in the wheel
449   //
450   new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
451   //
452   TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
453   //
454   hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
455   hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
456   //
457   hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
458   hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
459   //
460   Double_t ys = shift*TMath::Sin(openingAngle); 
461   Double_t xs = shift*TMath::Cos(openingAngle);
462   TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);  
463   tr->RegisterYourself();
464   TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
465   TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
466   TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
467   bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
468   bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
469   TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
470   TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
471   //
472   ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
473   //
474   // readout chambers
475   //
476   // IROC first
477   //
478    TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
479    TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
480   // empty space
481    TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
482    TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
483    ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
484    //bars
485    Double_t tga = (19.8328-12.3742)/39.3;
486    Double_t xmin,xmax;
487    xmin = 9.55*tga+12.3742;
488    xmax = 9.95*tga+12.3742;
489    TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
490    TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
491    empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
492    xmin=19.4*tga+12.3742;
493    xmax=19.9*tga+12.3742;
494    TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
495    TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
496    empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
497    xmin=29.35*tga+12.3742;
498    xmax=29.75*tga+12.3742;
499    TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2); 
500    TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);    
501    empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
502    //
503    // holes for connectors
504    //
505    TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
506    TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
507    TString fileName(gSystem->Getenv("ALICE_ROOT"));
508    fileName += "/TPC/conn_iroc.dat";
509    ifstream in;
510    in.open(fileName.Data(), ios_base::in); // asci file
511    for(Int_t i =0;i<86;i++){
512       Double_t y = 3.99;
513       Double_t x,z,ang;
514       in>>x>>z>>ang;
515       z-=26.5;
516       TGeoRotation *rrr = new TGeoRotation();
517       rrr->RotateY(ang);
518       TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
519       ibdv->AddNode(connv,i+1,trans);
520    }
521    in.close();
522    // "cap"
523    new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
524    // "hole"
525    new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
526    TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);  
527    tr1->RegisterYourself();
528    TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
529    TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
530    //
531    // pad plane and wire fixations
532    //
533    TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
534    TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
535    TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
536    TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
537    TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
538    TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
539    TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
540    //
541    TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
542    //
543    iroc->AddNode(ibdv,1);
544    iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
545    iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
546    tga =(23.3521-14.5974)/49.65; 
547    Double_t xx = 24.825*tga+14.5974-0.6;
548    iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
549    iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
550    //
551    // OROC
552    //
553    TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
554    TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
555    TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
556    TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
557    obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
558    //horizontal bars
559    tga=(38.5084-20.2938)/99.3;
560    xmin=tga*10.2+20.2938;
561    xmax=tga*10.6+20.2938;
562    TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
563    TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
564    //
565    xmin=22.55*tga+20.2938;
566    xmax=24.15*tga+20.2938;
567    TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
568    TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
569    //
570    xmin=36.1*tga+20.2938;
571    xmax=36.5*tga+20.2938;
572    TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
573    TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
574    //
575    xmin=49.0*tga+20.2938;
576    xmax=50.6*tga+20.2938;   
577    TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
578    TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
579    //
580    xmin=63.6*tga+20.2938;
581    xmax=64.0*tga+20.2938;
582    TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
583    TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
584    //
585    xmin=75.5*tga+20.2938;
586    xmax=77.15*tga+20.2938;
587    TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
588    TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
589    //
590    xmin=88.7*tga+20.2938;
591    xmax=89.1*tga+20.2938;
592    TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
593    TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
594    //
595    oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
596    oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
597    oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
598    oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
599    oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
600    oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
601    oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
602    // vertical bars
603    TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1); 
604    TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
605    TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
606    TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
607    TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
608    //
609    TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
610    TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
611    TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
612    TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
613    TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
614    //
615    oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
616    oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
617    oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
618    oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
619    oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
620    oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
621    oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
622    oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
623    //
624    // holes for connectors
625    //
626    fileName = gSystem->Getenv("ALICE_ROOT");
627    fileName += "/TPC/conn_oroc.dat";
628    in.open(fileName.Data(), ios_base::in); // asci file
629    for(Int_t i =0;i<78;i++){
630       Double_t y =3.89;
631       Double_t x,z,ang;
632       Double_t x1,z1,x2,z2;
633       in>>x>>z>>ang;        
634       Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
635       Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
636       //
637       x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;      
638       //
639       TGeoRotation *rr = new TGeoRotation();
640       rr->RotateY(ang); 
641       z1-=54.95;
642       z2-=54.95;
643       TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
644       TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
645       obdv->AddNode(connv,i+1,trans1);
646       obdv->AddNode(connv,i+79,trans2);
647    }
648    in.close();
649    // cap
650    new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
651    new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
652    TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
653    tr5->RegisterYourself();
654    TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
655    TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
656    //
657    // pad plane and wire fixations
658    //
659    TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
660    TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
661    //
662    tga=(43.5239-23.3874)/114.2;
663    TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
664    TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);  
665    xx = 57.1*tga+23.3874-0.7;
666    TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
667    TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
668    //
669    TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
670    //
671    oroc->AddNode(obdv,1);
672    oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
673    oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
674    oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
675    oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
676    // 
677    // now iroc and oroc are placed into a sector...
678    //
679    TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
680    TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
681    TGeoRotation rot1("rot1",90.,90.,0.);
682    TGeoRotation rot2("rot2");
683    rot2.RotateY(10.);
684    TGeoRotation *rot = new TGeoRotation("rot");
685    *rot=rot1*rot2;
686    //
687    Double_t x0,y0;
688    x0=110.2*TMath::Cos(openingAngle);
689    y0=110.2*TMath::Sin(openingAngle);
690    TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side 
691    TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
692    x0=188.45*TMath::Cos(openingAngle);
693    y0=188.45*TMath::Sin(openingAngle);
694    TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
695    TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
696    //
697    //
698    // A-side
699    //
700    secta->AddNode(ch,1);
701    secta->AddNode(iroc,1,combi1a);
702    secta->AddNode(oroc,1,combi2a);
703    //
704    // C-side
705    //
706    sectc->AddNode(ch,1);
707    sectc->AddNode(iroc,1,combi1c);
708    sectc->AddNode(oroc,1,combi2c);
709    //
710    // now I try to make  wheels...
711    //
712    TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
713    TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
714    //
715    for(Int_t i =0;i<18;i++){
716      Double_t phi = (20.*i);
717      TGeoRotation *r = new TGeoRotation();
718      r->RotateZ(phi);
719      wheela->AddNode(secta,i+1,r);
720      wheelc->AddNode(sectc,i+1,r); 
721     
722    }
723    // wheels in the drift volume!   
724
725    TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
726    v9->AddNode(wheela,1,combi3);
727    v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
728    //_____________________________________________________________
729    // service support wheel
730    //_____________________________________________________________
731   TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
732   sw->DefineSection(0,-4.,80.5,251.75);
733   sw->DefineSection(1,4.,80.5,251.75); 
734   TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
735   //
736   thick=1.;
737   shift = thick/TMath::Sin(openingAngle);
738   TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
739   sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
740   sh->DefineSection(1,4.,81.5-shift,250.75-shift);
741   TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
742   //
743   TGeoMedium *m9 =  gGeoManager->GetMedium("TPC_Si"); 
744   TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
745   el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
746   el->DefineSection(1,1.872,81.5-shift,250.75-shift);
747   TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si 
748   //
749   shv->AddNode(elv,1);
750   //
751   //
752   ys = shift*TMath::Sin(openingAngle);
753   xs = shift*TMath::Cos(openingAngle);
754   swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
755   // cover
756   TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
757   co->DefineSection(0,-0.5,77.,255.25);
758   co->DefineSection(1,0.5,77.,255.25);
759   TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
760   // hole in a cover
761   TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
762   shift=4./TMath::Sin(openingAngle);
763   coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
764   coh->DefineSection(1,0.5,85.-shift,247.25-shift);  
765   //
766   TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
767   //
768   ys = shift*TMath::Sin(openingAngle);
769   xs = shift*TMath::Cos(openingAngle);  
770   cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
771   //
772   // Sector as an Assembly
773   //
774   TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
775   swhs->AddNode(swv,1);
776   swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
777   swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
778   //
779   // SSW as an Assembly of sectors
780   //
781  TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
782    for(Int_t i =0;i<18;i++){
783      Double_t phi = (20.*i);
784      TGeoRotation *r = new TGeoRotation();
785      r->RotateZ(phi);
786      swheel->AddNode(swhs,i+1,r);   
787    }
788    v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
789    v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
790
791    // sensitive strips - strip "0" is always set
792    // conditional
793    Int_t totrows;
794    totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
795    Double_t *upar;
796    upar=NULL;
797    gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
798    upar=new Double_t [10];
799    upar[0]=0.;
800    upar[1]=360.;
801    upar[2]=18.;
802    upar[3]=2.;
803    //
804    upar[4]=-124.8;
805    upar[7]=124.8;
806
807    Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
808
809    upar[5]=rlow;
810    upar[6]=rlow+.01;
811    upar[8]=upar[5];
812    upar[9]=upar[6];
813    //
814    gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
815    gGeoManager->Node("TPC_Strip",totrows+1,
816                      "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
817    //
818    // now, strips optionally
819    //
820    if(fSens){
821      //lower sectors
822      for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
823        rlow=fTPCParam->GetPadRowRadiiLow(i-1);
824        upar[5]=rlow;
825        upar[6]=rlow+.01;
826        upar[8]=upar[5];
827        upar[9]=upar[6];
828        gGeoManager->Node("TPC_Strip",i,
829                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
830        gGeoManager->Node("TPC_Strip",totrows+i,
831                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);       
832      }
833      //upper sectors
834      for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
835        rlow=fTPCParam->GetPadRowRadiiUp(i-1); 
836        upar[5]=rlow;
837        upar[6]=rlow+.01;
838        upar[8]=upar[5];
839        upar[9]=upar[6];
840        gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
841                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10); 
842        gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
843                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10); 
844      }
845    }//strips
846   //----------------------------------------------------------
847   // TPc Support Rods - MAKROLON
848   //----------------------------------------------------------
849   TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
850   TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
851   TGeoMedium *m10 =  gGeoManager->GetMedium("TPC_Alumina");
852   TGeoMedium *m11 =  gGeoManager->GetMedium("TPC_Peek");
853   TGeoMedium *m12 =  gGeoManager->GetMedium("TPC_Water");
854   // upper and lower rods differ in length!
855   delete [] upar;
856   upar=NULL;
857   gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
858   upar=new Double_t [3];
859   upar[0]=1.8;
860   upar[1]=2.2;
861   
862   //
863   //HV rods - makrolon + 0.58cm (diameter) Cu
864   TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
865   TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
866   //
867   TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
868   TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
869   hvrv->AddNode(hvcv,1);
870   //
871   // resistor rods
872   //
873   TGeoTube *cri = new TGeoTube(0.,0.45,126.64); //inner 
874   TGeoTube *cro = new TGeoTube(0.,0.45,126.54); //outer 
875   TGeoTube *cwi = new TGeoTube(0.,0.15,126.64); // water inner
876   TGeoTube *cwo = new TGeoTube(0.,0.15,126.54); // water outer
877   //
878   TGeoVolume *criv = new TGeoVolume("TPC_CR_I",cri,m10);
879   TGeoVolume *crov = new TGeoVolume("TPC_CR_O",cro,m10);    
880   TGeoVolume *cwiv = new TGeoVolume("TPC_W_I",cwi,m11);
881   TGeoVolume *cwov = new TGeoVolume("TPC_W_O",cwo,m11);   
882   //
883   // ceramic rod with water
884   //
885   criv->AddNode(cwiv,1); 
886   crov->AddNode(cwov,1);
887   //
888   TGeoTube *pri =new TGeoTube(0.2,0.35,126.64); //inner 
889   TGeoTube *pro = new TGeoTube(0.2,0.35,126.54); //outer    
890   //
891   // peek rod
892   //
893   TGeoVolume *priv = new TGeoVolume("TPC_PR_I",pri,m12);
894   TGeoVolume *prov = new TGeoVolume("TPC_PR_O",pro,m12); 
895   //
896   // resistor rods assembly
897   //
898    TGeoRotation* rotr = new TGeoRotation("rotr");
899    rotr->RotateZ(-21.);
900   //
901   TGeoTube *rri = new TGeoTube(1.8,2.2,126.64);//inner
902   TGeoTube *rro = new TGeoTube(1.8,2.2,126.54);//inner
903   //
904   TGeoVolume *rriv = new TGeoVolume("TPC_RR_I",rri,m6);
905   TGeoVolume *rrov = new TGeoVolume("TPC_RR_O",rro,m6);  
906   //
907   TGeoVolumeAssembly *rrin = new TGeoVolumeAssembly("TPC_RROD_I");
908   TGeoVolumeAssembly *rrou = new TGeoVolumeAssembly("TPC_RROD_O");
909   rrin->AddNode(rriv,1);
910   rrin->AddNode(criv,1,new TGeoTranslation(0.5,0.866, 0.));
911   rrin->AddNode(criv,2,new TGeoTranslation(0.5,-0.866, 0.)); 
912   rrin->AddNode(priv,1); 
913   //
914   rrou->AddNode(rrov,1);
915   rrou->AddNode(crov,1,new TGeoTranslation(0.5,0.866, 0.));
916   rrou->AddNode(crov,2,new TGeoTranslation(0.5,-0.866, 0.)); 
917   rrou->AddNode(prov,1); 
918   //
919   for(Int_t i=0;i<18;i++){
920     Double_t angle,x,y;
921     Double_t z,r; 
922     angle=TMath::DegToRad()*20.*(Double_t)i;
923     r=81.5;
924     x=r * TMath::Cos(angle);
925     y=r * TMath::Sin(angle);
926     upar[2]=126.64; //lower
927     z= 126.96;
928     //
929     if(i==3){
930         v9->AddNode(rrin,1,new TGeoCombiTrans(x,y, z, rotr)); //A
931         v9->AddNode(rrin,2,new TGeoCombiTrans(x,y,-z, rotr)); //C      
932     } 
933     else { 
934       gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
935       gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
936     }
937    
938
939     //
940     r=254.25;
941     x=r * TMath::Cos(angle);
942     y=r * TMath::Sin(angle);
943     upar[2]=126.54; //upper
944     z=127.06;
945     //
946     if(i==15){
947       //v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));//A-side only
948         v9->AddNode(hvrv,1,new TGeoTranslation(x,y,127.14));//A-side only
949         gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
950     }
951     else if(i==11){
952         v9->AddNode(rrou,1,new TGeoCombiTrans(x,y, z, rotr));  //A
953         v9->AddNode(rrou,2,new TGeoCombiTrans(x,y,-z, rotr));  //C
954     }
955     else{
956     //
957       gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
958       gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
959     }
960   }
961
962   delete [] upar;
963
964   TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
965   alice->AddNode(v1,1);  
966   
967 } // end of function
968  
969 //_____________________________________________________________________________
970 void AliTPCv2::AddAlignableVolumes() const
971 {
972   //
973   // Create entries for alignable volumes associating the symbolic volume
974   // name with the corresponding volume path. Needs to be syncronized with
975   // eventual changes in the geometry.
976   // 
977   SetInnerChambersAlignable();
978   SetOuterChambersAlignable();
979 }
980  
981 //_____________________________________________________________________________
982 void AliTPCv2::SetInnerChambersAlignable() const
983 {
984   //
985   AliGeomManager::ELayerID idTPC1 = AliGeomManager::kTPC1;
986   Int_t modUID, modnum = 0;
987   TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
988   TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
989   TString vpappend = "/TPC_IROC_1";
990   TString snstr1="TPC/EndcapA/Sector";
991   TString snstr2="TPC/EndcapC/Sector";
992   TString snappend="/InnerChamber";
993   TString volpath, symname;
994   
995   for(Int_t cnt=1; cnt<=18; cnt++){
996     modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
997     volpath = vpstr1;
998     volpath += cnt;
999     volpath += vpappend;
1000     symname = snstr1;
1001     symname += cnt;
1002     symname += snappend;
1003     if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1004       AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1005     TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1006     TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1007     TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
1008     alignableEntry->SetMatrix(matTtoL);
1009   }
1010
1011   for(Int_t cnt=1; cnt<=18; cnt++){
1012     modUID = AliGeomManager::LayerToVolUID(idTPC1,modnum++);
1013     volpath = vpstr2;
1014     volpath += cnt;
1015     volpath += vpappend;
1016     symname = snstr2;
1017     symname += cnt;
1018     symname += snappend;
1019     if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1020       AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1021     TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1022     TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1023     TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
1024     alignableEntry->SetMatrix(matTtoL);
1025   }
1026 }
1027
1028 //_____________________________________________________________________________
1029 void AliTPCv2::SetOuterChambersAlignable() const
1030 {
1031   //
1032   AliGeomManager::ELayerID idTPC2 = AliGeomManager::kTPC2;
1033   Int_t modUID, modnum = 0;
1034   TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
1035   TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
1036   TString vpappend = "/TPC_OROC_1";
1037   TString snstr1="TPC/EndcapA/Sector";
1038   TString snstr2="TPC/EndcapC/Sector";
1039   TString snappend="/OuterChamber";
1040   TString volpath, symname;
1041   
1042   for(Int_t cnt=1; cnt<=18; cnt++){
1043     modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
1044     volpath = vpstr1;
1045     volpath += cnt;
1046     volpath += vpappend;
1047     symname = snstr1;
1048     symname += cnt;
1049     symname += snappend;
1050     if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1051       AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1052     TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1053     TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1054     TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
1055     alignableEntry->SetMatrix(matTtoL);
1056   }
1057
1058   for(Int_t cnt=1; cnt<=18; cnt++){
1059     modUID = AliGeomManager::LayerToVolUID(idTPC2,modnum++);
1060     volpath = vpstr2;
1061     volpath += cnt;
1062     volpath += vpappend;
1063     symname = snstr2;
1064     symname += cnt;
1065     symname += snappend;
1066     if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data(),modUID))
1067       AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1068     TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntryByUID(modUID);
1069     TGeoHMatrix* globMatrix = alignableEntry->GetGlobalOrig();
1070     TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
1071     alignableEntry->SetMatrix(matTtoL);
1072   }
1073 }
1074
1075 //_____________________________________________________________________________
1076 void AliTPCv2::DrawDetector() const
1077 {
1078   //
1079   // Draw a shaded view of the Time Projection Chamber version 1
1080   //
1081
1082   // Set everything unseen
1083   gMC->Gsatt("*", "seen", -1);
1084   // 
1085   // Set ALIC mother transparent
1086   gMC->Gsatt("ALIC","SEEN",0);
1087   //
1088   // Set the volumes visible
1089   //
1090
1091   gMC->Gsatt("TPC ","SEEN",0);
1092   gMC->Gsatt("TOIN","SEEN",1);
1093   gMC->Gsatt("TOIN","COLO",7);
1094   gMC->Gsatt("TOCV","SEEN",1);
1095   gMC->Gsatt("TOCV","COLO",4);
1096   gMC->Gsatt("TSA1","SEEN",0);
1097   gMC->Gsatt("TSA2","SEEN",0);
1098   gMC->Gsatt("TSA3","SEEN",0);
1099   gMC->Gsatt("TSA4","SEEN",0);  
1100   gMC->Gsatt("TSA5","SEEN",0);
1101   gMC->Gsatt("TOFC","SEEN",1);
1102   gMC->Gsatt("TOFC","COLO",4);
1103   gMC->Gsatt("TSA6","SEEN",0);
1104   gMC->Gsatt("TSA7","SEEN",0);
1105   gMC->Gsatt("TSA8","SEEN",0);    
1106   gMC->Gsatt("TIIN","SEEN",1);
1107   gMC->Gsatt("TIIN","COLO",7);
1108   gMC->Gsatt("TII1","SEEN",0);
1109   gMC->Gsatt("TIFC","SEEN",1);
1110   gMC->Gsatt("TIFC","COLO",4);
1111   gMC->Gsatt("TSA9","SEEN",0); 
1112   gMC->Gsatt("TS10","SEEN",0);
1113   gMC->Gsatt("TS11","SEEN",0);
1114   gMC->Gsatt("TS12","SEEN",0);
1115   gMC->Gsatt("TS13","SEEN",0);
1116   gMC->Gsatt("TS14","SEEN",0);
1117   gMC->Gsatt("TICC","SEEN",0);
1118   gMC->Gsatt("TICM","SEEN",0);
1119   gMC->Gsatt("TS15","SEEN",0);
1120   gMC->Gsatt("TS16","SEEN",0);
1121   gMC->Gsatt("TS17","SEEN",0);
1122   gMC->Gsatt("TS18","SEEN",0);  
1123   gMC->Gsatt("TS19","SEEN",0); 
1124   gMC->Gsatt("TPJ1","SEEN",0);
1125   gMC->Gsatt("TPJ2","SEEN",0);
1126   gMC->Gsatt("TICS","SEEN",0);
1127   gMC->Gsatt("TDGN","SEEN",0); 
1128   gMC->Gsatt("TIRC","SEEN",0);
1129   gMC->Gsatt("TIC1","SEEN",1);
1130   gMC->Gsatt("TIPP","SEEN",0);
1131   gMC->Gsatt("TIC3","SEEN",0);
1132   gMC->Gsatt("TRCE","SEEN",0);
1133   gMC->Gsatt("TPSC","SEEN",0);
1134   gMC->Gsatt("TPCC","SEEN",0); 
1135   gMC->Gsatt("TORC","SEEN",0);
1136   gMC->Gsatt("TOPP","SEEN",0);
1137   gMC->Gsatt("TOC3","SEEN",0);
1138   gMC->Gsatt("TOC1","SEEN",1);
1139   gMC->Gsatt("TSSW","SEEN",1);
1140   gMC->Gsatt("TSWC","SEEN",1);
1141   gMC->Gsatt("TSSW","COLO",3);
1142   gMC->Gsatt("TSWC","COLO",3);
1143   gMC->Gsatt("TSCE","COLO",6);
1144   gMC->Gsatt("TSCE","SEEN",1);
1145   gMC->Gsatt("TWES","SEEN",0);
1146   gMC->Gsatt("TSWB","SEEN",0);
1147   gMC->Gsatt("TPEL","SEEN",0);
1148   gMC->Gsatt("TPMW","SEEN",1);
1149   gMC->Gsatt("TESR","SEEN",1);
1150   gMC->Gsatt("TPMW","COLO",12);
1151   gMC->Gsatt("TIC1","COLO",5);
1152   gMC->Gsatt("TOC1","COLO",5);
1153   gMC->Gsatt("TESB","SEEN",0);
1154   gMC->Gsatt("THVM","SEEN",1);
1155   gMC->Gsatt("THVM","COLO",11);
1156   gMC->Gsatt("THVH","SEEN",0);
1157   gMC->Gsatt("TPSR","SEEN",0); 
1158   gMC->Gsatt("THVL","SEEN",0);
1159   gMC->Gsatt("THVC","SEEN",0);  
1160   gMC->Gsatt("THVE","SEEN",0);
1161   gMC->Gsatt("THVR","SEEN",0);
1162   gMC->Gsatt("TPSS","SEEN",0);
1163   gMC->Gsatt("TPUS","SEEN",0);
1164   gMC->Gsatt("TPLS","SEEN",0);
1165
1166   //
1167   gMC->Gdopt("hide", "on");
1168   gMC->Gdopt("shad", "on");
1169   gMC->Gsatt("*", "fill", 7);
1170   gMC->SetClipBox(".");
1171   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1172   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1173   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1174   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1175   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1176   gMC->DefaultRange();
1177   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1178   gMC->Gdhead(1111, "Time Projection Chamber");
1179   gMC->Gdman(18, 4, "MAN");
1180   gMC->Gdopt("hide","off");
1181 }
1182
1183 //_____________________________________________________________________________
1184 void AliTPCv2::CreateMaterials()
1185 {
1186   //
1187   // Define materials for version 2 of the Time Projection Chamber
1188   //
1189  
1190   AliTPC::CreateMaterials();
1191 }
1192
1193 //_____________________________________________________________________________
1194 void AliTPCv2::Init()
1195 {
1196   //
1197   // Initialises version 2 of the TPC after that it has been built
1198   //
1199
1200   Int_t *idtmed = fIdtmed->GetArray();
1201   
1202   AliTPC::Init();
1203
1204  
1205   fIdSens=gMC->VolId("TPC_Strip");  // one strip is always selected...
1206
1207   fIDrift=gMC->VolId("TPC_Drift");
1208   fSecOld=-100; // fake number 
1209
1210   gMC->SetMaxNStep(-30000); // max. number of steps increased
1211
1212   if (fPrimaryIonisation) {
1213       gMC->Gstpar(idtmed[2],"PRIMIO_E", 20.77); // 1st ionisation potential
1214  
1215       gMC->Gstpar(idtmed[2],"PRIMIO_N", 14.35);
1216       gMC->Gstpar(idtmed[2],"LOSS", 14); // specific energy loss
1217       gMC->Gstpar(idtmed[2],"STRA",4);
1218   } else {
1219       gMC->Gstpar(idtmed[2],"LOSS", 5); // specific energy loss
1220   }
1221
1222
1223   AliInfo("*** TPC version 2 initialized ***");
1224   AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
1225
1226   //
1227   
1228 }
1229
1230 //_____________________________________________________________________________
1231 void AliTPCv2::StepManager()
1232 {
1233   //
1234   // Called for every step in the Time Projection Chamber
1235   //
1236
1237   //
1238   // parameters used for the energy loss calculations
1239   //
1240   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1241   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1242   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation 
1243  
1244  
1245   const Float_t kbig = 1.e10;
1246
1247   Int_t id,copy;
1248   Float_t hits[5];
1249   Int_t vol[2];  
1250   TLorentzVector p;
1251   
1252   vol[1]=0; // preset row number to 0
1253   //
1254   if (fPrimaryIonisation) gMC->SetMaxStep(kbig);
1255   
1256   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1257   
1258   Float_t charge = gMC->TrackCharge();
1259   
1260   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1261   
1262   // check the sensitive volume
1263
1264   id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1265   if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume 
1266
1267   gMC->TrackPosition(p);
1268   Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1269   //
1270   
1271   //
1272   Double_t angle = TMath::ACos(p[0]/r);  
1273   angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1274   //
1275   // angular segment, it is not a real sector number...
1276   //
1277   Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1278                fTPCParam->GetInnerAngle());
1279   // rotate to segment "0"
1280   Float_t cos,sin;
1281   fTPCParam->AdjustCosSin(sector,cos,sin);
1282   Float_t x1=p[0]*cos + p[1]*sin;
1283   // check if within sector's limits
1284   if((x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp())
1285      ||(x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp())){
1286   // calculate real sector number...
1287   if (x1>fTPCParam->GetOuterRadiusLow()){
1288     sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1289              fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1290     if (p[2]<0)         sector+=(fTPCParam->GetNOuterSector()>>1);
1291   }
1292     else   
1293       if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);  
1294   //
1295   // here I have a sector number
1296   //
1297
1298   vol[0]=sector;
1299   // check if change of sector
1300   if(sector != fSecOld){
1301     fSecOld=sector;
1302     // add track reference
1303     AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kTPC);
1304   }  
1305   // track is in the sensitive strip
1306   if(id == fIdSens){
1307     // track is entering the strip
1308     if (gMC->IsTrackEntering()){
1309       Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1310       vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1311       // row numbers are autonomous for lower and upper sectors
1312       if(vol[0] > fTPCParam->GetNInnerSector()) {
1313         vol[1] -= fTPCParam->GetNRowLow();
1314       }
1315     //
1316       if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
1317   
1318         // lower sector, row 0, because Jouri wants to have this
1319
1320         gMC->TrackMomentum(p);
1321         hits[0]=p[0];
1322         hits[1]=p[1];
1323         hits[2]=p[2];
1324         hits[3]=0.; // this hit has no energy loss
1325         // Get also the track time for pileup simulation
1326         hits[4]=gMC->TrackTime();
1327
1328         AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  
1329       }
1330     //
1331
1332        gMC->TrackPosition(p);
1333        hits[0]=p[0];
1334        hits[1]=p[1];
1335        hits[2]=p[2];
1336        hits[3]=0.; // this hit has no energy loss
1337        // Get also the track time for pileup simulation
1338        hits[4]=gMC->TrackTime();
1339
1340        AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  
1341     
1342     }
1343     else return;
1344   }  
1345   //-----------------------------------------------------------------
1346   //  charged particle is in the sensitive drift volume
1347   //-----------------------------------------------------------------
1348   if(gMC->TrackStep() > 0) {
1349     Int_t nel=0;
1350     if (!fPrimaryIonisation) {
1351       nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1352     }
1353     else {
1354           Float_t edep = gMC->Edep();
1355           if (edep > 0.) nel = (Int_t)((gMC->Edep()*1.5)/kwIon) + 1;      
1356     }
1357     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1358     //
1359     gMC->TrackPosition(p);
1360     hits[0]=p[0];
1361     hits[1]=p[1];
1362     hits[2]=p[2];
1363     hits[3]=(Float_t)nel;
1364
1365     // Add this hit
1366
1367     if (fHitType&&2){
1368       gMC->TrackMomentum(p);
1369       Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1370       Float_t precision =   (momentum>0.1) ? 0.002 :0.01;
1371       fTrackHits->SetHitPrecision(precision);
1372     }
1373
1374     // Get also the track time for pileup simulation
1375     hits[4]=gMC->TrackTime();
1376  
1377     AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1378
1379   } // step>0 
1380   } //within sector's limits
1381   // Stemax calculation for the next step
1382   
1383   Float_t pp;
1384   TLorentzVector mom;
1385   // below is valid only for Geant3 (fPromaryIonisation not set)
1386   if(!fPrimaryIonisation){
1387     gMC->TrackMomentum(mom);
1388     Float_t ptot=mom.Rho();
1389     Float_t betaGamma = ptot/gMC->TrackMass();
1390
1391     Int_t pid=gMC->TrackPid();
1392     if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1393       { 
1394         pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1395       }
1396     else
1397       {
1398
1399         betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
1400         pp=kprim*AliMathBase::BetheBlochAleph(betaGamma); 
1401    
1402     }
1403   
1404     Double_t rnd = gMC->GetRandom()->Rndm();
1405   
1406     gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1407   }
1408   
1409 }
1410
1411