Just something left from v2...now clean
[u/mrichter/AliRoot.git] / TPC / AliTPCv4.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 /*
17 $Log$
18 Revision 1.1  2007/06/24 20:56:19  hristov
19 TPC version for the krypton runs (Marek)
20
21 */
22
23 //
24 ///////////////////////////////////////////////////////////////////////////////
25 //                                                                           //
26 //  Time Projection Chamber version 4 -- detailed TPC and slow simulation    //
27 //  of Krypton  decays                                                       //
28 //                                                                           //
29 //Begin_Html                                                                 //
30 /*
31 <img src="picts/AliTPCv2Class.gif">
32 */
33 //End_Html
34 //                                                                           //
35 //                                                                           //
36 ///////////////////////////////////////////////////////////////////////////////
37
38 //#include <stdlib.h>
39
40 #include <TLorentzVector.h>
41 #include <TPDGCode.h>
42 #include <TString.h>
43 #include "AliLog.h"
44 #include "AliTPCParam.h"
45 #include "AliTPCTrackHitsV2.h"
46 #include "AliTPCv4.h"
47 #include "TGeoVolume.h"
48 #include "TGeoPcon.h"
49 #include "TGeoTube.h"
50 #include "TGeoPgon.h"
51 #include "TGeoTrd1.h"
52 #include "TGeoCompositeShape.h"
53 #include "TGeoPara.h"
54 #include "TGeoPhysicalNode.h"
55
56 ClassImp(AliTPCv4)
57  
58 //_____________________________________________________________________________
59 AliTPCv4::AliTPCv4(const char *name, const char *title) :
60   AliTPC(name, title),
61   fIdSens(0),
62   fIDrift(0),
63   fSecOld(0) 
64 {
65   //
66   // Standard constructor for Time Projection Chamber version 2
67   //
68
69
70   SetBufferSize(128000);
71
72
73   if (fTPCParam)
74      fTPCParam->Write(fTPCParam->GetTitle());
75 }
76  
77 //_____________________________________________________________________________
78 void AliTPCv4::CreateGeometry()
79 {
80   //
81   // Create the geometry of Time Projection Chamber version 2
82   //
83   //Begin_Html
84   /*
85     <img src="picts/AliTPC.gif">
86   */
87   //End_Html
88   //Begin_Html
89   /*
90     <img src="picts/AliTPCv2Tree.gif">
91   */
92   //End_Html
93
94   //----------------------------------------------------------
95   // This geometry is written using TGeo class
96   // Firstly the shapes are defined, and only then the volumes
97   // What is recognized by the MC are volumes
98   //----------------------------------------------------------
99   //
100   //  tpc - this will be the mother volume
101   //
102
103   //
104   // here I define a volume TPC
105   // retrive the medium name with "TPC_" as a leading string
106   //
107   TGeoPcon *tpc = new TGeoPcon(0.,360.,18); //18 sections
108   tpc->DefineSection(0,-290.,77.,278.);
109   tpc->DefineSection(1,-259.6,70.,278.);
110   //
111   tpc->DefineSection(2,-259.6,68.1,278.);
112   tpc->DefineSection(3,-253.6,68.1,278.);
113   //
114   tpc->DefineSection(4,-253.6,68.,278.);
115   tpc->DefineSection(5,-74.0,60.8,278.);
116   //
117   tpc->DefineSection(6,-74.0,60.1,278.);
118   tpc->DefineSection(7,-73.3,60.1,278.);
119   //
120   tpc->DefineSection(8,-73.3,56.9,278.); 
121   tpc->DefineSection(9,73.3,56.9,278.);
122   //
123   tpc->DefineSection(10,73.3,60.1,278.);
124   tpc->DefineSection(11,74.0,60.1,278.);
125   //
126   tpc->DefineSection(12,74.0,60.8,278.);
127   tpc->DefineSection(13,253.6,65.5,278.);
128   //
129   tpc->DefineSection(14,253.6,65.6,278.);
130   tpc->DefineSection(15,259.6,65.6,278.);
131   //
132   tpc->DefineSection(16,259.6,70.0,278.);
133   tpc->DefineSection(17,290.,77.,278.);
134   //
135   TGeoMedium *m1 = gGeoManager->GetMedium("TPC_Air");
136   TGeoVolume *v1 = new TGeoVolume("TPC_M",tpc,m1);
137   //
138   // drift volume - sensitive volume, extended beyond the
139   // endcaps, because of the alignment
140   //
141   TGeoPcon *dvol = new TGeoPcon(0.,360.,6);
142   dvol->DefineSection(0,-260.,74.5,264.4);
143   dvol->DefineSection(1,-253.6,74.5,264.4);
144   //
145   dvol->DefineSection(2,-253.6,76.6774,258.);
146   dvol->DefineSection(3,253.6,76.6774,258.); 
147   //
148   dvol->DefineSection(4,253.6,74.5,264.4);
149   dvol->DefineSection(5,260.,74.5,264.4);
150   //
151   TGeoMedium *m5 = gGeoManager->GetMedium("TPC_Ne-CO2-N-3");
152   TGeoVolume *v9 = new TGeoVolume("TPC_Drift",dvol,m5);
153   //
154   v1->AddNode(v9,1);
155   //
156   // outer insulator
157   //
158   TGeoPcon *tpco = new TGeoPcon(0.,360.,6); //insulator
159   //
160   tpco->DefineSection(0,-256.6,264.8,278.);
161   tpco->DefineSection(1,-253.6,264.8,278.);
162   //
163   tpco->DefineSection(2,-253.6,258.,278.);
164   tpco->DefineSection(3,250.6,258.,278.);
165   //
166   tpco->DefineSection(4,250.6,258.,275.5);
167   tpco->DefineSection(5,253.6,258.,275.5);
168   //
169   TGeoMedium *m2 = gGeoManager->GetMedium("TPC_CO2");
170   TGeoVolume *v2 = new TGeoVolume("TPC_OI",tpco,m2);
171   //
172   // outer containment vessel
173   //
174   TGeoPcon *tocv = new TGeoPcon(0.,360.,6);  // containment vessel
175   //
176   tocv->DefineSection(0,-256.6,264.8,278.);
177   tocv->DefineSection(1,-253.6,264.8,278.);
178   //
179   tocv->DefineSection(2,-253.6,274.8124,278.);
180   tocv->DefineSection(3,247.6,274.8124,278.);  
181   //
182   tocv->DefineSection(4,247.6,270.4,278.);
183   tocv->DefineSection(5,250.6,270.4,278.);
184   //
185   TGeoMedium *m3 = gGeoManager->GetMedium("TPC_Al");
186   TGeoVolume *v3 = new TGeoVolume("TPC_OCV",tocv,m3); 
187   //
188   TGeoTube *to1 = new TGeoTube(274.8174,277.995,252.1); //epoxy
189   TGeoTube *to2 = new TGeoTube(274.8274,277.985,252.1); //tedlar
190   TGeoTube *to3 = new TGeoTube(274.8312,277.9812,252.1);//prepreg2
191   TGeoTube *to4 = new TGeoTube(274.9062,277.9062,252.1);//nomex
192   //
193   TGeoMedium *sm1 = gGeoManager->GetMedium("TPC_Epoxy");
194   TGeoMedium *sm2 = gGeoManager->GetMedium("TPC_Tedlar");
195   TGeoMedium *sm3 = gGeoManager->GetMedium("TPC_Prepreg2");
196   TGeoMedium *sm4 = gGeoManager->GetMedium("TPC_Nomex");
197   //
198   TGeoVolume *tov1 = new TGeoVolume("TPC_OCV1",to1,sm1);
199   TGeoVolume *tov2 = new TGeoVolume("TPC_OCV2",to2,sm2);
200   TGeoVolume *tov3 = new TGeoVolume("TPC_OCV3",to3,sm3);
201   TGeoVolume *tov4 = new TGeoVolume("TPC_OCV4",to4,sm4);
202  //-------------------------------------------------------
203   //  Tpc Outer Field Cage
204   //  daughters - composite (sandwich)
205   //-------------------------------------------------------
206
207   TGeoPcon *tofc = new TGeoPcon(0.,360.,6);
208   //
209   tofc->DefineSection(0,-253.6,258.,269.6);
210   tofc->DefineSection(1,-250.6,258.,269.6);
211   //
212   tofc->DefineSection(2,-250.6,258.,260.0676); 
213   tofc->DefineSection(3,250.6,258.,260.0676);
214   //
215   tofc->DefineSection(4,250.6,258.,275.5);
216   tofc->DefineSection(5,253.6,258.,275.5);
217   //
218   TGeoVolume *v4 = new TGeoVolume("TPC_TOFC",tofc,m3); 
219   //sandwich
220   TGeoTube *tf1 = new TGeoTube(258.0,260.0676,252.1); //tedlar
221   TGeoTube *tf2 = new TGeoTube(258.0038,260.0638,252.1); //prepreg3
222   TGeoTube *tf3 = new TGeoTube(258.0338,260.0338,252.1);//nomex
223   //
224   TGeoMedium *sm5 = gGeoManager->GetMedium("TPC_Prepreg3");
225   //
226   TGeoVolume *tf1v = new TGeoVolume("TPC_OFC1",tf1,sm2);
227   TGeoVolume *tf2v = new TGeoVolume("TPC_OFC2",tf2,sm5);
228   TGeoVolume *tf3v = new TGeoVolume("TPC_OFC3",tf3,sm4);
229   //
230   // outer part - positioning
231   //
232   tov1->AddNode(tov2,1); tov2->AddNode(tov3,1); tov3->AddNode(tov4,1);
233   //
234   tf1v->AddNode(tf2v,1); tf2v->AddNode(tf3v,1);
235   //
236   v3->AddNode(tov1,1,new TGeoTranslation(0.,0.,-1.5)); v4->AddNode(tf1v,1);
237   //
238   v2->AddNode(v3,1); v2->AddNode(v4,1); 
239   //
240   v1->AddNode(v2,1);
241   //--------------------------------------------------------------------
242   // Tpc Inner INsulator (CO2) 
243   // the cones, the central drum and the inner f.c. sandwich with a piece
244   // of the flane will be placed in the TPC
245   //--------------------------------------------------------------------
246   TGeoPcon *tpci = new TGeoPcon(0.,360.,4);
247   //
248   tpci->DefineSection(0,-253.6,68.4,76.6774);
249   tpci->DefineSection(1,-74.0,61.2,76.6774);
250   //
251   tpci->DefineSection(2,74.0,61.2,76.6774);  
252   //
253   tpci->DefineSection(3,253.6,65.9,76.6774);
254   //
255   TGeoVolume *v5 = new TGeoVolume("TPC_INI",tpci,m2);
256   //
257   // now the inner field cage - only part of flanges (2 copies)
258   //
259   TGeoTube *tif1 = new TGeoTube(69.9,76.6774,1.5); 
260   TGeoVolume *v6 = new TGeoVolume("TPC_IFC1",tif1,m3);
261   //
262  //---------------------------------------------------------
263   // Tpc Inner Containment vessel - Muon side
264   //---------------------------------------------------------
265   TGeoPcon *tcms = new TGeoPcon(0.,360.,10);
266   //
267   tcms->DefineSection(0,-259.1,68.1,74.2);
268   tcms->DefineSection(1,-253.6,68.1,74.2);
269   //
270   tcms->DefineSection(2,-253.6,68.1,68.4);
271   tcms->DefineSection(3,-74.0,60.9,61.2);
272   //
273   tcms->DefineSection(4,-74.0,60.1,61.2);
274   tcms->DefineSection(5,-73.3,60.1,61.2);
275   //
276   tcms->DefineSection(6,-73.3,56.9,61.2);
277   tcms->DefineSection(7,-73.0,56.9,61.2);
278   //
279   tcms->DefineSection(8,-73.0,56.9,58.8);
280   tcms->DefineSection(9,-71.3,56.9,58.8);
281   //
282   TGeoVolume *v7 = new TGeoVolume("TPC_ICVM",tcms,m3);
283   //-----------------------------------------------
284   // inner containment vessel - shaft side
285   //-----------------------------------------------
286   TGeoPcon *tcss = new TGeoPcon(0.,360.,10);
287   //
288   tcss->DefineSection(0,71.3,56.9,58.8);
289   tcss->DefineSection(1,73.0,56.9,58.8);
290   //
291   tcss->DefineSection(2,73.0,56.9,61.2);
292   tcss->DefineSection(3,73.3,56.9,61.2);
293   //  
294   tcss->DefineSection(4,73.3,60.1,61.2);
295   tcss->DefineSection(5,74.0,60.1,61.2);
296   //
297   tcss->DefineSection(6,74.0,60.9,61.2);
298   tcss->DefineSection(7,253.6,65.6,65.9);
299   //
300   tcss->DefineSection(8,253.6,65.6,74.2);
301   tcss->DefineSection(9,258.1,65.6,74.2);
302   //
303   TGeoVolume *v8 = new TGeoVolume("TPC_ICVS",tcss,m3);
304   //-----------------------------------------------
305   //  Inner field cage
306   //  define 4 parts and make an assembly
307   //-----------------------------------------------
308   // part1 - Al - 2 copies
309   TGeoTube *t1 = new TGeoTube(76.6774,78.845,0.75);
310   TGeoVolume *tv1 = new TGeoVolume("TPC_IFC2",t1,m3);
311   // sandwich - outermost parts - 2 copies
312   TGeoTube *t2 = new TGeoTube(76.6774,78.845,74.175); // tedlar 38 microns
313   TGeoTube *t3 = new TGeoTube(76.6812,78.8412,74.175); // prepreg2 500 microns
314   TGeoTube *t4 = new TGeoTube(76.7312,78.7912,74.175); // prepreg3 300 microns
315   TGeoTube *t5 = new TGeoTube(76.7612,78.7612,74.175); // nomex 2 cm
316   //
317   TGeoVolume *tv2 = new TGeoVolume("TPC_IFC3",t2,sm2);
318   TGeoVolume *tv3 = new TGeoVolume("TPC_IFC4",t3,sm3);
319   TGeoVolume *tv4 = new TGeoVolume("TPC_IFC5",t4,sm5);
320   TGeoVolume *tv5 = new TGeoVolume("TPC_IFC6",t5,sm4);
321   //
322   // middle parts - 2 copies
323   TGeoTube *t6 = new TGeoTube(76.6774,78.795,5.); // tedlar 38 microns
324   TGeoTube *t7 = new TGeoTube(76.6812,78.7912,5.); // prepreg2 250 microns
325   TGeoTube *t8 = new TGeoTube(76.7062,78.7662,5.); // prepreg3 300 microns
326   TGeoTube *t9 = new TGeoTube(76.7362,78.7362,5.); // nomex 2 cm
327   //
328   TGeoVolume *tv6 = new TGeoVolume("TPC_IFC7",t6,sm2);
329   TGeoVolume *tv7 = new TGeoVolume("TPC_IFC8",t7,sm3);
330   TGeoVolume *tv8 = new TGeoVolume("TPC_IFC9",t8,sm5);
331   TGeoVolume *tv9 = new TGeoVolume("TPC_IFC10",t9,sm4);
332   // central part - 1 copy
333   TGeoTube *t10 = new TGeoTube(76.6774,78.745,93.75); // tedlar 38 microns 
334   TGeoTube *t11 = new TGeoTube(76.6812,78.7412,93.75); // prepreg3 300 microns
335   TGeoTube *t12 = new TGeoTube(76.7112,78.7112,93.75); // nomex 2 cm
336   //
337   TGeoVolume *tv10 = new TGeoVolume("TPC_IFC11",t10,sm2);
338   TGeoVolume *tv11 = new TGeoVolume("TPC_IFC12",t11,sm5);
339   TGeoVolume *tv12 = new TGeoVolume("TPC_IFC13",t12,sm4);
340   //
341   // inner part - positioning
342   //
343   // creating a sandwich
344   tv2->AddNode(tv3,1); tv3->AddNode(tv4,1); tv4->AddNode(tv5,1);
345   //
346   tv6->AddNode(tv7,1); tv7->AddNode(tv8,1); tv8->AddNode(tv9,1);
347   //
348   tv10->AddNode(tv11,1); tv11->AddNode(tv12,1);
349   //
350   TGeoVolumeAssembly *tv100 = new TGeoVolumeAssembly("TPC_IFC");
351   //
352   tv100->AddNode(tv10,1);
353   tv100->AddNode(tv6,1,new TGeoTranslation(0.,0.,-98.75));
354   tv100->AddNode(tv6,2,new TGeoTranslation(0.,0.,98.75));
355   tv100->AddNode(tv2,1,new TGeoTranslation(0.,0.,-177.925));
356   tv100->AddNode(tv2,2,new TGeoTranslation(0.,0.,177.925));
357   tv100->AddNode(tv1,1,new TGeoTranslation(0.,0.,-252.85));
358   tv100->AddNode(tv1,2,new TGeoTranslation(0.,0.,252.85));
359   //
360   v5->AddNode(v6,1, new TGeoTranslation(0.,0.,-252.1));
361   v5->AddNode(v6,2, new TGeoTranslation(0.,0.,252.1));
362   v1->AddNode(v5,1); v1->AddNode(v7,1); v1->AddNode(v8,1); 
363   v9->AddNode(tv100,1);
364   //
365   // central drum 
366   //
367   // flange + sandwich
368   //
369   TGeoPcon *cfl = new TGeoPcon(0.,360.,6);
370   cfl->DefineSection(0,-71.1,59.7,61.2);
371   cfl->DefineSection(1,-68.6,59.7,61.2);
372   //
373   cfl->DefineSection(2,-68.6,60.6324,61.2);
374   cfl->DefineSection(3,68.6,60.6324,61.2); 
375   //
376   cfl->DefineSection(4,68.6,59.7,61.2);
377   cfl->DefineSection(5,71.1,59.7,61.2);  
378   //
379   TGeoVolume *cflv = new TGeoVolume("TPC_CDR",cfl,m3);
380   // sandwich
381   TGeoTube *cd1 = new TGeoTube(60.6424,61.19,71.1);
382   TGeoTube *cd2 = new TGeoTube(60.6462,61.1862,71.1);
383   TGeoTube *cd3 = new TGeoTube(60.6662,61.1662,71.1);  
384   //
385   TGeoMedium *sm6 = gGeoManager->GetMedium("TPC_Prepreg1");
386   TGeoVolume *cd1v = new TGeoVolume("TPC_CDR1",cd1,sm2); //tedlar
387   TGeoVolume *cd2v = new TGeoVolume("TPC_CDR2",cd2,sm6);// prepreg1
388   TGeoVolume *cd3v = new TGeoVolume("TPC_CDR3",cd3,sm4); //nomex
389   //
390   // seals for central drum 2 copies
391   //
392   TGeoTube *cs = new TGeoTube(56.9,61.2,0.1);
393   TGeoMedium *sm7 = gGeoManager->GetMedium("TPC_Mylar");
394   TGeoVolume *csv = new TGeoVolume("TPC_CDRS",cs,sm7);
395   v1->AddNode(csv,1,new TGeoTranslation(0.,0.,-71.));
396   v1->AddNode(csv,2,new TGeoTranslation(0.,0.,71.));
397   //
398   // seal collars 
399   TGeoPcon *se = new TGeoPcon(0.,360.,6);
400   se->DefineSection(0,-72.8,59.7,61.2);
401   se->DefineSection(1,-72.3,59.7,61.2);
402   //
403   se->DefineSection(2,-72.3,58.85,61.2);
404   se->DefineSection(3,-71.6,58.85,61.2); 
405   //
406   se->DefineSection(4,-71.6,59.7,61.2);
407   se->DefineSection(5,-71.3,59.7,61.2);  
408   //
409   TGeoVolume *sev = new TGeoVolume("TPC_CDCE",se,m3);
410   //
411   TGeoTube *si = new TGeoTube(56.9,58.8,1.); 
412   TGeoVolume *siv = new TGeoVolume("TPC_CDCI",si,m3);
413   //
414   // define reflection matrix 
415   //
416   TGeoRotation *ref = new TGeoRotation("ref",90.,0.,90.,90.,180.,0.);
417   //
418   cd1v->AddNode(cd2v,1); cd2v->AddNode(cd3v,1); cflv->AddNode(cd1v,1);
419   //
420   v1->AddNode(siv,1,new TGeoTranslation(0.,0.,-69.9));
421   v1->AddNode(siv,2,new TGeoTranslation(0.,0.,69.9));
422   v1->AddNode(sev,1); v1->AddNode(sev,2,ref); v1->AddNode(cflv,1);
423   //
424   // central membrane - 2 rings and a mylar membrane - assembly
425   //
426   TGeoTube *ih = new TGeoTube(81.05,84.05,0.3);
427   TGeoTube *oh = new TGeoTube(250.,256.,.5);
428   TGeoTube *mem = new TGeoTube(84.05,250,0.01);
429   TGeoVolume *ihv = new TGeoVolume("TPC_IHVH",ih,m3);
430   TGeoVolume *ohv = new TGeoVolume("TPC_OHVH",oh,m3);
431   TGeoVolume *memv = new TGeoVolume("TPC_HV",mem,sm7);
432   //
433   TGeoVolumeAssembly *cm = new TGeoVolumeAssembly("TPC_HVMEM");
434   cm->AddNode(ihv,1);
435   cm->AddNode(ohv,1);
436   cm->AddNode(memv,1);
437   v9->AddNode(cm,1);
438   //
439   // end caps - they are make as an assembly of single segments
440   // containing both readout chambers
441   //
442   Double_t openingAngle = 10.*TMath::DegToRad();
443   Double_t thick=1.5; // rib
444   Double_t shift = thick/TMath::Sin(openingAngle);
445   //
446   Double_t lowEdge = 86.3; // hole in the wheel
447   Double_t upEdge = 240.4; // hole in the wheel
448   //
449   new TGeoTubeSeg("sec",74.5,264.4,3.,0.,20.);
450   //
451   TGeoPgon *hole = new TGeoPgon("hole",0.,20.,1,4);
452   //
453   hole->DefineSection(0,-3.5,lowEdge-shift,upEdge-shift);
454   hole->DefineSection(1,-1.5,lowEdge-shift,upEdge-shift);
455   //
456   hole->DefineSection(2,-1.5,lowEdge-shift,upEdge+3.-shift);
457   hole->DefineSection(3,3.5,lowEdge-shift,upEdge+3.-shift);
458   //
459   Double_t ys = shift*TMath::Sin(openingAngle); 
460   Double_t xs = shift*TMath::Cos(openingAngle);
461   TGeoTranslation *tr = new TGeoTranslation("tr",xs,ys,0.);  
462   tr->RegisterYourself();
463   TGeoCompositeShape *chamber = new TGeoCompositeShape("sec-hole:tr");
464   TGeoVolume *sv = new TGeoVolume("TPC_WSEG",chamber,m3);
465   TGeoPgon *bar = new TGeoPgon("bar",0.,20.,1,2);
466   bar->DefineSection(0,-3.,131.5-shift,136.5-shift);
467   bar->DefineSection(1,1.5,131.5-shift,136.5-shift);
468   TGeoVolume *barv = new TGeoVolume("TPC_WBAR",bar,m3);
469   TGeoVolumeAssembly *ch = new TGeoVolumeAssembly("TPC_WCH");//empty segment
470   //
471   ch->AddNode(sv,1); ch->AddNode(barv,1,tr);
472   //
473   // readout chambers
474   //
475   // IROC first
476   //
477    TGeoTrd1 *ibody = new TGeoTrd1(13.8742,21.3328,4.29,21.15);
478    TGeoVolume *ibdv = new TGeoVolume("TPC_IROCB",ibody,m3);
479   // empty space
480    TGeoTrd1 *emp = new TGeoTrd1(12.3742,19.8328,3.99,19.65);
481    TGeoVolume *empv = new TGeoVolume("TPC_IROCE",emp,m1);
482    ibdv->AddNode(empv,1,new TGeoTranslation(0.,-0.3,0.));
483    //bars
484    Double_t tga = (19.8328-12.3742)/39.3;
485    Double_t xmin,xmax;
486    xmin = 9.55*tga+12.3742;
487    xmax = 9.95*tga+12.3742;
488    TGeoTrd1 *ib1 = new TGeoTrd1(xmin,xmax,3.29,0.2);
489    TGeoVolume *ib1v = new TGeoVolume("TPC_IRB1",ib1,m3);
490    empv->AddNode(ib1v,1,new TGeoTranslation("tt1",0.,0.7,-9.9));
491    xmin=19.4*tga+12.3742;
492    xmax=19.9*tga+12.3742;
493    TGeoTrd1 *ib2 = new TGeoTrd1(xmin,xmax,3.29,0.25);
494    TGeoVolume *ib2v = new TGeoVolume("TPC_TRB2",ib2,m3);
495    empv->AddNode(ib2v,1,new TGeoTranslation(0.,0.7,0.));
496    xmin=29.35*tga+12.3742;
497    xmax=29.75*tga+12.3742;
498    TGeoTrd1 *ib3 = new TGeoTrd1(xmin,xmax,3.29,0.2); 
499    TGeoVolume *ib3v = new TGeoVolume("TPC_IRB3",ib3,m3);    
500    empv->AddNode(ib3v,1,new TGeoTranslation(0.,0.7,9.9));
501    //
502    // holes for connectors
503    //
504    TGeoBBox *conn = new TGeoBBox(0.4,0.3,4.675); // identical for iroc and oroc
505    TGeoVolume *connv = new TGeoVolume("TPC_RCCON",conn,m1);
506    TString fileName(gSystem->Getenv("ALICE_ROOT"));
507    fileName += "/TPC/conn_iroc.dat";
508    ifstream in;
509    in.open(fileName.Data(), ios_base::in); // asci file
510    for(Int_t i =0;i<86;i++){
511       Double_t y = 3.99;
512       Double_t x,z,ang;
513       in>>x>>z>>ang;
514       z-=26.5;
515       TGeoRotation *rrr = new TGeoRotation();
516       rrr->RotateY(ang);
517       TGeoCombiTrans *trans = new TGeoCombiTrans("trans",x,y,z,rrr);
518       ibdv->AddNode(connv,i+1,trans);
519    }
520    in.close();
521    // "cap"
522    new TGeoTrd1("icap",14.5974,23.3521,1.19,24.825);
523    // "hole"
524    new TGeoTrd1("ihole",13.8742,21.3328,1.2,21.15);
525    TGeoTranslation *tr1 = new TGeoTranslation("tr1",0.,0.,1.725);  
526    tr1->RegisterYourself();
527    TGeoCompositeShape *ic = new TGeoCompositeShape("icap-ihole:tr1");
528    TGeoVolume *icv = new TGeoVolume("TPC_IRCAP",ic,m3);
529    //
530    // pad plane and wire fixations
531    //
532    TGeoTrd1 *pp = new TGeoTrd1(14.5974,23.3521,0.3,24.825); //pad+iso
533    TGeoMedium *m4 = gGeoManager->GetMedium("TPC_G10");
534    TGeoVolume *ppv = new TGeoVolume("TPC_IRPP",pp,m4);
535    TGeoPara *f1 = new TGeoPara(.6,.5,24.825,0.,-10.,0.);
536    TGeoVolume *f1v = new TGeoVolume("TPC_IRF1",f1,m4);
537    TGeoPara *f2 = new TGeoPara(.6,.5,24.825,0.,10.,0.);
538    TGeoVolume *f2v = new TGeoVolume("TPC_IRF2",f2,m4);
539    //
540    TGeoVolumeAssembly *iroc = new TGeoVolumeAssembly("TPC_IROC");
541    //
542    iroc->AddNode(ibdv,1);
543    iroc->AddNode(icv,1,new TGeoTranslation(0.,3.1,-1.725));
544    iroc->AddNode(ppv,1,new TGeoTranslation(0.,4.59,-1.725));
545    tga =(23.3521-14.5974)/49.65; 
546    Double_t xx = 24.825*tga+14.5974-0.6;
547    iroc->AddNode(f1v,1,new TGeoTranslation(-xx,5.39,-1.725));
548    iroc->AddNode(f2v,1,new TGeoTranslation(xx,5.39,-1.725));
549    //
550    // OROC
551    //
552    TGeoTrd1 *obody = new TGeoTrd1(22.2938,40.5084,4.19,51.65);
553    TGeoVolume *obdv = new TGeoVolume("TPC_OROCB",obody,m3);
554    TGeoTrd1 *oemp = new TGeoTrd1(20.2938,38.5084,3.89,49.65);
555    TGeoVolume *oempv = new TGeoVolume("TPC_OROCE",oemp,m1);
556    obdv->AddNode(oempv,1,new TGeoTranslation(0.,-0.3,0.));
557    //horizontal bars
558    tga=(38.5084-20.2938)/99.3;
559    xmin=tga*10.2+20.2938;
560    xmax=tga*10.6+20.2938;
561    TGeoTrd1 *ob1 = new TGeoTrd1(xmin,xmax,2.915,0.2);
562    TGeoVolume *ob1v = new TGeoVolume("TPC_ORB1",ob1,m3);
563    //
564    xmin=22.55*tga+20.2938;
565    xmax=24.15*tga+20.2938;
566    TGeoTrd1 *ob2 = new TGeoTrd1(xmin,xmax,2.915,0.8);
567    TGeoVolume *ob2v = new TGeoVolume("TPC_ORB2",ob2,m3);
568    //
569    xmin=36.1*tga+20.2938;
570    xmax=36.5*tga+20.2938;
571    TGeoTrd1 *ob3 = new TGeoTrd1(xmin,xmax,2.915,0.2);
572    TGeoVolume *ob3v = new TGeoVolume("TPC_ORB3",ob3,m3);
573    //
574    xmin=49.0*tga+20.2938;
575    xmax=50.6*tga+20.2938;   
576    TGeoTrd1 *ob4 = new TGeoTrd1(xmin,xmax,2.915,0.8);
577    TGeoVolume *ob4v = new TGeoVolume("TPC_ORB4",ob4,m3);
578    //
579    xmin=63.6*tga+20.2938;
580    xmax=64.0*tga+20.2938;
581    TGeoTrd1 *ob5 = new TGeoTrd1(xmin,xmax,2.915,0.2);
582    TGeoVolume *ob5v = new TGeoVolume("TPC_ORB5",ob5,m3);
583    //
584    xmin=75.5*tga+20.2938;
585    xmax=77.15*tga+20.2938;
586    TGeoTrd1 *ob6 = new TGeoTrd1(xmin,xmax,2.915,0.8);
587    TGeoVolume *ob6v = new TGeoVolume("TPC_ORB6",ob6,m3);
588    //
589    xmin=88.7*tga+20.2938;
590    xmax=89.1*tga+20.2938;
591    TGeoTrd1 *ob7 = new TGeoTrd1(xmin,xmax,2.915,0.2);
592    TGeoVolume *ob7v = new TGeoVolume("TPC_ORB7",ob7,m3);
593    //
594    oempv->AddNode(ob1v,1,new TGeoTranslation(0.,0.975,-39.25));
595    oempv->AddNode(ob2v,1,new TGeoTranslation(0.,0.975,-26.3));
596    oempv->AddNode(ob3v,1,new TGeoTranslation(0.,0.975,-13.35));
597    oempv->AddNode(ob4v,1,new TGeoTranslation(0.,0.975,0.15));
598    oempv->AddNode(ob5v,1,new TGeoTranslation(0.,0.975,14.15));
599    oempv->AddNode(ob6v,1,new TGeoTranslation(0.,0.975,26.7));
600    oempv->AddNode(ob7v,1,new TGeoTranslation(0.,0.975,39.25));
601    // vertical bars
602    TGeoBBox *ob8 = new TGeoBBox(0.8,2.915,5.1); 
603    TGeoBBox *ob9 = new TGeoBBox(0.8,2.915,5.975);
604    TGeoBBox *ob10 = new TGeoBBox(0.8,2.915,5.775);
605    TGeoBBox *ob11 = new TGeoBBox(0.8,2.915,6.25);
606    TGeoBBox *ob12 = new TGeoBBox(0.8,2.915,6.5);
607    //
608    TGeoVolume *ob8v = new TGeoVolume("TPC_ORB8",ob8,m3);
609    TGeoVolume *ob9v = new TGeoVolume("TPC_ORB9",ob9,m3);
610    TGeoVolume *ob10v = new TGeoVolume("TPC_ORB10",ob10,m3);
611    TGeoVolume *ob11v = new TGeoVolume("TPC_ORB11",ob11,m3);
612    TGeoVolume *ob12v = new TGeoVolume("TPC_ORB12",ob12,m3);
613    //
614    oempv->AddNode(ob8v,1,new TGeoTranslation(0.,0.975,-44.55));
615    oempv->AddNode(ob8v,2,new TGeoTranslation(0.,0.975,44.55));
616    oempv->AddNode(ob9v,1,new TGeoTranslation(0.,0.975,-33.075));
617    oempv->AddNode(ob9v,2,new TGeoTranslation(0.,0.975,-19.525));
618    oempv->AddNode(ob10v,1,new TGeoTranslation(0.,0.975,20.125));
619    oempv->AddNode(ob10v,2,new TGeoTranslation(0.,0.975,33.275));
620    oempv->AddNode(ob11v,1,new TGeoTranslation(0.,0.975,-6.9));
621    oempv->AddNode(ob12v,1,new TGeoTranslation(0.,0.975,7.45));
622    //
623    // holes for connectors
624    //
625    fileName = gSystem->Getenv("ALICE_ROOT");
626    fileName += "/TPC/conn_oroc.dat";
627    in.open(fileName.Data(), ios_base::in); // asci file
628    for(Int_t i =0;i<78;i++){
629       Double_t y =3.89;
630       Double_t x,z,ang;
631       Double_t x1,z1,x2,z2;
632       in>>x>>z>>ang;        
633       Double_t xr = 4.7*TMath::Sin(ang*TMath::DegToRad());
634       Double_t zr = 4.7*TMath::Cos(ang*TMath::DegToRad());
635       //
636       x1=xr+x; x2=-xr+x; z1=zr+z; z2 = -zr+z;      
637       //
638       TGeoRotation *rr = new TGeoRotation();
639       rr->RotateY(ang); 
640       z1-=54.95;
641       z2-=54.95;
642       TGeoCombiTrans *trans1 = new TGeoCombiTrans("trans1",x1,y,z1,rr);
643       TGeoCombiTrans *trans2 = new TGeoCombiTrans("trans2",x2,y,z2,rr);
644       obdv->AddNode(connv,i+1,trans1);
645       obdv->AddNode(connv,i+79,trans2);
646    }
647    in.close();
648    // cap
649    new TGeoTrd1("ocap",23.3874,43.5239,1.09,57.1);
650    new TGeoTrd1("ohole",22.2938,40.5084,1.09,51.65);
651    TGeoTranslation *tr5 = new TGeoTranslation("tr5",0.,0.,-2.15);
652    tr5->RegisterYourself();
653    TGeoCompositeShape *oc = new TGeoCompositeShape("ocap-ohole:tr5");
654    TGeoVolume *ocv = new TGeoVolume("TPC_ORCAP",oc,m3);
655    //
656    // pad plane and wire fixations
657    //
658    TGeoTrd1 *opp = new TGeoTrd1(23.3874,43.5239,0.3,57.1);
659    TGeoVolume *oppv = new TGeoVolume("TPC_ORPP",opp,m4);
660    //
661    tga=(43.5239-23.3874)/114.2;
662    TGeoPara *f3 = new TGeoPara(.7,.6,57.1,0.,-10.,0.);
663    TGeoPara *f4 = new TGeoPara(.7,.6,57.1,0.,10.,0.);  
664    xx = 57.1*tga+23.3874-0.7;
665    TGeoVolume *f3v = new TGeoVolume("TPC_ORF1",f3,m4);
666    TGeoVolume *f4v = new TGeoVolume("TPC_ORF2",f4,m4);
667    //
668    TGeoVolumeAssembly *oroc = new TGeoVolumeAssembly("TPC_OROC");
669    //
670    oroc->AddNode(obdv,1);
671    oroc->AddNode(ocv,1,new TGeoTranslation(0.,3.1,2.15));
672    oroc->AddNode(oppv,1,new TGeoTranslation(0.,4.49,2.15));
673    oroc->AddNode(f3v,1,new TGeoTranslation(-xx,5.39,2.15));
674    oroc->AddNode(f4v,1,new TGeoTranslation(xx,5.39,2.15));
675    // 
676    // now iroc and oroc are placed into a sector...
677    //
678    TGeoVolumeAssembly *secta = new TGeoVolumeAssembly("TPC_SECT"); // a-side
679    TGeoVolumeAssembly *sectc = new TGeoVolumeAssembly("TPC_SECT"); // c-side
680    TGeoRotation rot1("rot1",90.,90.,0.);
681    TGeoRotation rot2("rot2");
682    rot2.RotateY(10.);
683    TGeoRotation *rot = new TGeoRotation("rot");
684    *rot=rot1*rot2;
685    //
686    Double_t x0,y0;
687    x0=110.2*TMath::Cos(openingAngle);
688    y0=110.2*TMath::Sin(openingAngle);
689    TGeoCombiTrans *combi1a = new TGeoCombiTrans("combi1",x0,y0,1.09+0.195,rot); //a-side 
690    TGeoCombiTrans *combi1c = new TGeoCombiTrans("combi1",x0,y0,1.09+0.222,rot); //c-side
691    x0=188.45*TMath::Cos(openingAngle);
692    y0=188.45*TMath::Sin(openingAngle);
693    TGeoCombiTrans *combi2a = new TGeoCombiTrans("combi2",x0,y0,0.99+0.195,rot); //a-side
694    TGeoCombiTrans *combi2c = new TGeoCombiTrans("combi2",x0,y0,0.99+0.222,rot); //c-side
695    //
696    //
697    // A-side
698    //
699    secta->AddNode(ch,1);
700    secta->AddNode(iroc,1,combi1a);
701    secta->AddNode(oroc,1,combi2a);
702    //
703    // C-side
704    //
705    sectc->AddNode(ch,1);
706    sectc->AddNode(iroc,1,combi1c);
707    sectc->AddNode(oroc,1,combi2c);
708    //
709    // now I try to make  wheels...
710    //
711    TGeoVolumeAssembly *wheela = new TGeoVolumeAssembly("TPC_ENDCAP");
712    TGeoVolumeAssembly *wheelc = new TGeoVolumeAssembly("TPC_ENDCAP");
713    //
714    for(Int_t i =0;i<18;i++){
715      Double_t phi = (20.*i);
716      TGeoRotation *r = new TGeoRotation();
717      r->RotateZ(phi);
718      wheela->AddNode(secta,i+1,r);
719      wheelc->AddNode(sectc,i+1,r); 
720     
721    }
722    // wheels in the drift volume!   
723
724    TGeoCombiTrans *combi3 = new TGeoCombiTrans("combi3",0.,0.,256.6,ref);
725    v9->AddNode(wheela,1,combi3);
726    v9->AddNode(wheelc,2,new TGeoTranslation(0.,0.,-256.6));
727    //_____________________________________________________________
728    // service support wheel
729    //_____________________________________________________________
730   TGeoPgon *sw = new TGeoPgon(0.,20.,1,2);
731   sw->DefineSection(0,-4.,80.5,251.75);
732   sw->DefineSection(1,4.,80.5,251.75); 
733   TGeoVolume *swv = new TGeoVolume("TPC_SWSEG",sw,m3); //Al
734   //
735   thick=1.;
736   shift = thick/TMath::Sin(openingAngle);
737   TGeoPgon *sh = new TGeoPgon(0.,20.,1,2);
738   sh->DefineSection(0,-4.,81.5-shift,250.75-shift);
739   sh->DefineSection(1,4.,81.5-shift,250.75-shift);
740   TGeoVolume *shv = new TGeoVolume("TPC_SWS1",sh,m1); //Air
741   //
742   TGeoMedium *m9 =  gGeoManager->GetMedium("TPC_Si"); 
743   TGeoPgon *el = new TGeoPgon(0.,20.,1,2);
744   el->DefineSection(0,-1.872,81.5-shift,250.75-shift);
745   el->DefineSection(1,1.872,81.5-shift,250.75-shift);
746   TGeoVolume *elv = new TGeoVolume("TPC_ELEC",el,m9); //Si 
747   //
748   shv->AddNode(elv,1);
749   //
750   //
751   ys = shift*TMath::Sin(openingAngle);
752   xs = shift*TMath::Cos(openingAngle);
753   swv->AddNode(shv,1,new TGeoTranslation(xs,ys,0.));
754   // cover
755   TGeoPgon *co = new TGeoPgon(0.,20.,1,2);
756   co->DefineSection(0,-0.5,77.,255.25);
757   co->DefineSection(1,0.5,77.,255.25);
758   TGeoVolume *cov = new TGeoVolume("TPC_SWC1",co,m3);//Al
759   // hole in a cover
760   TGeoPgon *coh = new TGeoPgon(0.,20.,1,2);
761   shift=4./TMath::Sin(openingAngle);
762   coh->DefineSection(0,-0.5,85.-shift,247.25-shift);
763   coh->DefineSection(1,0.5,85.-shift,247.25-shift);  
764   //
765   TGeoVolume *cohv = new TGeoVolume("TPC_SWC2",coh,m1);
766   //
767   ys = shift*TMath::Sin(openingAngle);
768   xs = shift*TMath::Cos(openingAngle);  
769   cov->AddNode(cohv,1,new TGeoTranslation(xs,ys,0.));
770   //
771   // Sector as an Assembly
772   //
773   TGeoVolumeAssembly *swhs = new TGeoVolumeAssembly("TPC_SSWSEC");
774   swhs->AddNode(swv,1);
775   swhs->AddNode(cov,1,new TGeoTranslation(0.,0.,-4.5));
776   swhs->AddNode(cov,2,new TGeoTranslation(0.,0.,4.5));
777   //
778   // SSW as an Assembly of sectors
779   //
780  TGeoVolumeAssembly *swheel = new TGeoVolumeAssembly("TPC_SSWHEEL");
781    for(Int_t i =0;i<18;i++){
782      Double_t phi = (20.*i);
783      TGeoRotation *r = new TGeoRotation();
784      r->RotateZ(phi);
785      swheel->AddNode(swhs,i+1,r);   
786    }
787    v1->AddNode(swheel,1,new TGeoTranslation(0.,0.,-284.6));
788    v1->AddNode(swheel,2,new TGeoTranslation(0.,0.,284.6));
789
790    // sensitive strips - strip "0" is always set
791    // conditional
792    Int_t totrows;
793    totrows = fTPCParam->GetNRowLow() + fTPCParam->GetNRowUp();
794    Double_t *upar;
795    upar=NULL;
796    gGeoManager->Volume("TPC_Strip","PGON",m5->GetId(),upar);
797    upar=new Double_t [10];
798    upar[0]=0.;
799    upar[1]=360.;
800    upar[2]=18.;
801    upar[3]=2.;
802    //
803    upar[4]=-124.8;
804    upar[7]=124.8;
805
806    Double_t rlow=fTPCParam->GetPadRowRadiiLow(0);
807
808    upar[5]=rlow;
809    upar[6]=rlow+.01;
810    upar[8]=upar[5];
811    upar[9]=upar[6];
812    //
813    gGeoManager->Node("TPC_Strip",1,"TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
814    gGeoManager->Node("TPC_Strip",totrows+1,
815                      "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);
816    //
817    // now, strips optionally
818    //
819    if(fSens){
820      //lower sectors
821      for(Int_t i=2;i<fTPCParam->GetNRowLow()+1;i++){
822        rlow=fTPCParam->GetPadRowRadiiLow(i-1);
823        upar[5]=rlow;
824        upar[6]=rlow+.01;
825        upar[8]=upar[5];
826        upar[9]=upar[6];
827        gGeoManager->Node("TPC_Strip",i,
828                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10);
829        gGeoManager->Node("TPC_Strip",totrows+i,
830                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10);       
831      }
832      //upper sectors
833      for(Int_t i=1;i<fTPCParam->GetNRowUp()+1;i++){
834        rlow=fTPCParam->GetPadRowRadiiUp(i-1); 
835        upar[5]=rlow;
836        upar[6]=rlow+.01;
837        upar[8]=upar[5];
838        upar[9]=upar[6];
839        gGeoManager->Node("TPC_Strip",i+fTPCParam->GetNRowLow(),
840                          "TPC_Drift",0.,0.,124.82,0,kTRUE,upar,10); 
841        gGeoManager->Node("TPC_Strip",totrows+i+fTPCParam->GetNRowLow(),
842                          "TPC_Drift",0.,0.,-124.82,0,kTRUE,upar,10); 
843      }
844    }//strips
845   //----------------------------------------------------------
846   // TPc Support Rods - MAKROLON
847   //----------------------------------------------------------
848   TGeoMedium *m6=gGeoManager->GetMedium("TPC_Makrolon");
849   TGeoMedium *m7=gGeoManager->GetMedium("TPC_Cu");
850   // upper and lower rods differ in length!
851   delete [] upar;
852   upar=NULL;
853   gGeoManager->Volume("TPC_Rod","TUBE",m6->GetId(),upar);
854   upar=new Double_t [3];
855   upar[0]=1.8;
856   upar[1]=2.2;
857   
858   //
859   //HV rods - makrolon + 0.58cm (diameter) Cu
860   TGeoTube *hvr = new TGeoTube(0.,2.2,126.64);
861   TGeoTube *hvc = new TGeoTube(0.,0.29,126.64);
862   //
863   TGeoVolume *hvrv = new TGeoVolume("TPC_HV_Rod",hvr,m6);
864   TGeoVolume *hvcv = new TGeoVolume("TPC_HV_Cable",hvc,m7);
865   hvrv->AddNode(hvcv,1);
866   
867   for(Int_t i=0;i<18;i++){
868     Double_t angle,x,y;
869     Double_t z,r; 
870     angle=TMath::DegToRad()*20.*(Double_t)i;
871     r=81.5;
872     x=r * TMath::Cos(angle);
873     y=r * TMath::Sin(angle);
874     upar[2]=126.64; //lower
875     z= 126.96;
876     if(i==15){
877       v9->AddNode(hvrv,1,new TGeoTranslation(x,y,z));
878       v9->AddNode(hvrv,2,new TGeoTranslation(x,y,-z));
879     }
880     else{
881      gGeoManager->Node("TPC_Rod",i+1,"TPC_Drift",x,y,z,0,kTRUE,upar,3);//shaft
882      gGeoManager->Node("TPC_Rod",i+19,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);//muon
883     }
884     r=254.25;
885     x=r * TMath::Cos(angle);
886     y=r * TMath::Sin(angle);
887     upar[2]=126.54; //upper
888     z=127.06;
889     gGeoManager->Node("TPC_Rod",i+37,"TPC_Drift",x,y,z,0,kTRUE,upar,3);
890     gGeoManager->Node("TPC_Rod",i+55,"TPC_Drift",x,y,-z,0,kTRUE,upar,3);
891   }
892
893   TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
894   alice->AddNode(v1,1);  
895   
896 } // end of function
897  
898 //_____________________________________________________________________________
899 void AliTPCv4::AddAlignableVolumes() const
900 {
901   //
902   // Create entries for alignable volumes associating the symbolic volume
903   // name with the corresponding volume path. Needs to be syncronized with
904   // eventual changes in the geometry.
905   // 
906   SetInnerChambersAlignable();
907   SetOuterChambersAlignable();
908 }
909  
910 //_____________________________________________________________________________
911 void AliTPCv4::SetInnerChambersAlignable() const
912 {
913   //
914   Int_t modnum = 0;
915   TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
916   TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
917   TString vpappend = "/TPC_IROC_1";
918   TString snstr1="TPC/EndcapA/Sector";
919   TString snstr2="TPC/EndcapC/Sector";
920   TString snappend="/InnerChamber";
921   TString volpath, symname;
922   
923   for(Int_t cnt=1; cnt<=18; cnt++){
924     volpath = vpstr1;
925     volpath += cnt;
926     volpath += vpappend;
927     symname = snstr1;
928     symname += cnt;
929     symname += snappend;
930     if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
931       AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
932     //
933     TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntry(symname.Data());
934     const char *path = alignableEntry->GetTitle();
935     if (!gGeoManager->cd(path))
936       AliFatal(Form("Volume path %s not valid!",path));
937     TGeoHMatrix* globMatrix = gGeoManager->GetCurrentMatrix();
938     TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,cnt-1);
939     alignableEntry->SetMatrix(matTtoL);
940     modnum++;
941   }
942
943   for(Int_t cnt=1; cnt<=18; cnt++){
944     volpath = vpstr2;
945     volpath += cnt;
946     volpath += vpappend;
947     symname = snstr2;
948     symname += cnt;
949     symname += snappend;
950     if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
951       AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
952     TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntry(symname.Data());
953     const char *path = alignableEntry->GetTitle();
954     if (!gGeoManager->cd(path))
955       AliFatal(Form("Volume path %s not valid!",path));
956     TGeoHMatrix* globMatrix = gGeoManager->GetCurrentMatrix();
957     TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,18+cnt-1);
958     alignableEntry->SetMatrix(matTtoL);
959     modnum++;
960   }
961 }
962
963 //_____________________________________________________________________________
964 void AliTPCv4::SetOuterChambersAlignable() const
965 {
966   //
967   Int_t modnum = 0;
968   TString vpstr1 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_1/TPC_SECT_";
969   TString vpstr2 = "ALIC_1/TPC_M_1/TPC_Drift_1/TPC_ENDCAP_2/TPC_SECT_";
970   TString vpappend = "/TPC_OROC_1";
971   TString snstr1="TPC/EndcapA/Sector";
972   TString snstr2="TPC/EndcapC/Sector";
973   TString snappend="/OuterChamber";
974   TString volpath, symname;
975   
976   for(Int_t cnt=1; cnt<=18; cnt++){
977     volpath = vpstr1;
978     volpath += cnt;
979     volpath += vpappend;
980     symname = snstr1;
981     symname += cnt;
982     symname += snappend;
983     if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
984       AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
985     TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntry(symname.Data());
986     const char *path = alignableEntry->GetTitle();
987     if (!gGeoManager->cd(path))
988       AliFatal(Form("Volume path %s not valid!",path));
989     TGeoHMatrix* globMatrix = gGeoManager->GetCurrentMatrix();
990     TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+cnt-1);
991     alignableEntry->SetMatrix(matTtoL);
992     modnum++;
993   }
994
995   for(Int_t cnt=1; cnt<=18; cnt++){
996     volpath = vpstr2;
997     volpath += cnt;
998     volpath += vpappend;
999     symname = snstr2;
1000     symname += cnt;
1001     symname += snappend;
1002     if(!gGeoManager->SetAlignableEntry(symname.Data(),volpath.Data()))
1003       AliFatal(Form("Alignable entry %s not created. Volume path %s not valid", symname.Data(),volpath.Data()));
1004      TGeoPNEntry *alignableEntry = gGeoManager->GetAlignableEntry(symname.Data());
1005     const char *path = alignableEntry->GetTitle();
1006     if (!gGeoManager->cd(path))
1007       AliFatal(Form("Volume path %s not valid!",path));
1008     TGeoHMatrix* globMatrix = gGeoManager->GetCurrentMatrix();
1009     TGeoHMatrix* matTtoL = fTPCParam->Tracking2LocalMatrix(globMatrix,36+18+cnt-1);
1010     alignableEntry->SetMatrix(matTtoL);
1011     modnum++;
1012   }
1013 }
1014
1015 //_____________________________________________________________________________
1016 void AliTPCv4::DrawDetector() const
1017 {
1018   //
1019   // Draw a shaded view of the Time Projection Chamber version 1
1020   //
1021
1022   // Set everything unseen
1023   gMC->Gsatt("*", "seen", -1);
1024   // 
1025   // Set ALIC mother transparent
1026   gMC->Gsatt("ALIC","SEEN",0);
1027   //
1028   // Set the volumes visible
1029   //
1030
1031   gMC->Gsatt("TPC ","SEEN",0);
1032   gMC->Gsatt("TOIN","SEEN",1);
1033   gMC->Gsatt("TOIN","COLO",7);
1034   gMC->Gsatt("TOCV","SEEN",1);
1035   gMC->Gsatt("TOCV","COLO",4);
1036   gMC->Gsatt("TSA1","SEEN",0);
1037   gMC->Gsatt("TSA2","SEEN",0);
1038   gMC->Gsatt("TSA3","SEEN",0);
1039   gMC->Gsatt("TSA4","SEEN",0);  
1040   gMC->Gsatt("TSA5","SEEN",0);
1041   gMC->Gsatt("TOFC","SEEN",1);
1042   gMC->Gsatt("TOFC","COLO",4);
1043   gMC->Gsatt("TSA6","SEEN",0);
1044   gMC->Gsatt("TSA7","SEEN",0);
1045   gMC->Gsatt("TSA8","SEEN",0);    
1046   gMC->Gsatt("TIIN","SEEN",1);
1047   gMC->Gsatt("TIIN","COLO",7);
1048   gMC->Gsatt("TII1","SEEN",0);
1049   gMC->Gsatt("TIFC","SEEN",1);
1050   gMC->Gsatt("TIFC","COLO",4);
1051   gMC->Gsatt("TSA9","SEEN",0); 
1052   gMC->Gsatt("TS10","SEEN",0);
1053   gMC->Gsatt("TS11","SEEN",0);
1054   gMC->Gsatt("TS12","SEEN",0);
1055   gMC->Gsatt("TS13","SEEN",0);
1056   gMC->Gsatt("TS14","SEEN",0);
1057   gMC->Gsatt("TICC","SEEN",0);
1058   gMC->Gsatt("TICM","SEEN",0);
1059   gMC->Gsatt("TS15","SEEN",0);
1060   gMC->Gsatt("TS16","SEEN",0);
1061   gMC->Gsatt("TS17","SEEN",0);
1062   gMC->Gsatt("TS18","SEEN",0);  
1063   gMC->Gsatt("TS19","SEEN",0); 
1064   gMC->Gsatt("TPJ1","SEEN",0);
1065   gMC->Gsatt("TPJ2","SEEN",0);
1066   gMC->Gsatt("TICS","SEEN",0);
1067   gMC->Gsatt("TDGN","SEEN",0); 
1068   gMC->Gsatt("TIRC","SEEN",0);
1069   gMC->Gsatt("TIC1","SEEN",1);
1070   gMC->Gsatt("TIPP","SEEN",0);
1071   gMC->Gsatt("TIC3","SEEN",0);
1072   gMC->Gsatt("TRCE","SEEN",0);
1073   gMC->Gsatt("TPSC","SEEN",0);
1074   gMC->Gsatt("TPCC","SEEN",0); 
1075   gMC->Gsatt("TORC","SEEN",0);
1076   gMC->Gsatt("TOPP","SEEN",0);
1077   gMC->Gsatt("TOC3","SEEN",0);
1078   gMC->Gsatt("TOC1","SEEN",1);
1079   gMC->Gsatt("TSSW","SEEN",1);
1080   gMC->Gsatt("TSWC","SEEN",1);
1081   gMC->Gsatt("TSSW","COLO",3);
1082   gMC->Gsatt("TSWC","COLO",3);
1083   gMC->Gsatt("TSCE","COLO",6);
1084   gMC->Gsatt("TSCE","SEEN",1);
1085   gMC->Gsatt("TWES","SEEN",0);
1086   gMC->Gsatt("TSWB","SEEN",0);
1087   gMC->Gsatt("TPEL","SEEN",0);
1088   gMC->Gsatt("TPMW","SEEN",1);
1089   gMC->Gsatt("TESR","SEEN",1);
1090   gMC->Gsatt("TPMW","COLO",12);
1091   gMC->Gsatt("TIC1","COLO",5);
1092   gMC->Gsatt("TOC1","COLO",5);
1093   gMC->Gsatt("TESB","SEEN",0);
1094   gMC->Gsatt("THVM","SEEN",1);
1095   gMC->Gsatt("THVM","COLO",11);
1096   gMC->Gsatt("THVH","SEEN",0);
1097   gMC->Gsatt("TPSR","SEEN",0); 
1098   gMC->Gsatt("THVL","SEEN",0);
1099   gMC->Gsatt("THVC","SEEN",0);  
1100   gMC->Gsatt("THVE","SEEN",0);
1101   gMC->Gsatt("THVR","SEEN",0);
1102   gMC->Gsatt("TPSS","SEEN",0);
1103   gMC->Gsatt("TPUS","SEEN",0);
1104   gMC->Gsatt("TPLS","SEEN",0);
1105
1106   //
1107   gMC->Gdopt("hide", "on");
1108   gMC->Gdopt("shad", "on");
1109   gMC->Gsatt("*", "fill", 7);
1110   gMC->SetClipBox(".");
1111   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1112   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1113   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1114   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1115   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1116   gMC->DefaultRange();
1117   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1118   gMC->Gdhead(1111, "Time Projection Chamber");
1119   gMC->Gdman(18, 4, "MAN");
1120   gMC->Gdopt("hide","off");
1121 }
1122
1123 //_____________________________________________________________________________
1124 void AliTPCv4::CreateMaterials()
1125 {
1126   //
1127   // Define materials for version 2 of the Time Projection Chamber
1128   //
1129  
1130   AliTPC::CreateMaterials();
1131 }
1132
1133 //_____________________________________________________________________________
1134 void AliTPCv4::Init()
1135 {
1136   //
1137   // Initialises version 2 of the TPC after that it has been built
1138   //
1139
1140   Int_t *idtmed = fIdtmed->GetArray();
1141   
1142   AliTPC::Init();
1143
1144  
1145   fIdSens=gMC->VolId("TPC_Strip");  // one strip is always selected...
1146
1147   fIDrift=gMC->VolId("TPC_Drift");
1148   fSecOld=-100; // fake number 
1149
1150   gMC->SetMaxNStep(-30000); // max. number of steps increased
1151
1152   gMC->Gstpar(idtmed[20],"LOSS",6); // specific energy loss
1153
1154   AliInfo("*** TPC version 4 initialized ***");
1155   AliInfo(Form("Maximum number of steps = %d",gMC->GetMaxNStep()));
1156
1157   //
1158   
1159 }
1160
1161 //_____________________________________________________________________________
1162 void AliTPCv4::StepManager()
1163 {
1164   //
1165   // Called for every step in the Time Projection Chamber
1166   //
1167
1168   //
1169   // parameters used for the energy loss calculations
1170   //
1171   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1172   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1173   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation 
1174  
1175  
1176   const Float_t kbig = 1.e10;
1177
1178   Int_t id,copy;
1179   Float_t hits[5];
1180   Int_t vol[2];  
1181   TLorentzVector p;
1182   
1183   vol[1]=0; // preset row number to 0
1184   //
1185   gMC->SetMaxStep(kbig);
1186   
1187   
1188   
1189   Float_t charge = gMC->TrackCharge();
1190   
1191   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1192   
1193   // check the sensitive volume
1194
1195   id = gMC->CurrentVolID(copy); // vol ID and copy number (starts from 1!)
1196   if(id != fIDrift && id != fIdSens) return; // not in the sensitive folume 
1197
1198   gMC->TrackPosition(p);
1199   Double_t r = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1200   //
1201   
1202   //
1203   Double_t angle = TMath::ACos(p[0]/r);  
1204   angle = (p[1]<0.) ? TMath::TwoPi()-angle : angle;
1205   //
1206   // angular segment, it is not a real sector number...
1207   //
1208   Int_t sector=TMath::Nint((angle-fTPCParam->GetInnerAngleShift())/
1209                fTPCParam->GetInnerAngle());
1210   // rotate to segment "0"
1211   Float_t cos,sin;
1212   fTPCParam->AdjustCosSin(sector,cos,sin);
1213   Float_t x1=p[0]*cos + p[1]*sin;
1214   // check if within sector's limits
1215   if(x1>=fTPCParam->GetInnerRadiusLow()&&x1<=fTPCParam->GetInnerRadiusUp()
1216      ||x1>=fTPCParam->GetOuterRadiusLow()&&x1<=fTPCParam->GetOuterRadiusUp()){
1217   // calculate real sector number...
1218   if (x1>fTPCParam->GetOuterRadiusLow()){
1219     sector = TMath::Nint((angle-fTPCParam->GetOuterAngleShift())/
1220              fTPCParam->GetOuterAngle())+fTPCParam->GetNInnerSector();
1221     if (p[2]<0)         sector+=(fTPCParam->GetNOuterSector()>>1);
1222   }
1223     else   
1224       if (p[2]<0) sector+=(fTPCParam->GetNInnerSector()>>1);  
1225   //
1226   // here I have a sector number
1227   //
1228
1229   vol[0]=sector;
1230   // check if change of sector
1231   if(sector != fSecOld){
1232     fSecOld=sector;
1233     // add track reference
1234     AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
1235   }  
1236   // track is in the sensitive strip
1237   if(id == fIdSens){
1238     // track is entering the strip
1239     if (gMC->IsTrackEntering()){
1240       Int_t totrows = fTPCParam->GetNRowLow()+fTPCParam->GetNRowUp();
1241       vol[1] = (copy<=totrows) ? copy-1 : copy-1-totrows;
1242       // row numbers are autonomous for lower and upper sectors
1243       if(vol[0] > fTPCParam->GetNInnerSector()) {
1244         vol[1] -= fTPCParam->GetNRowLow();
1245       }
1246     //
1247       if(vol[0]<fTPCParam->GetNInnerSector()&&vol[1] == 0){
1248   
1249         // lower sector, row 0, because Jouri wants to have this
1250
1251         gMC->TrackMomentum(p);
1252         hits[0]=p[0];
1253         hits[1]=p[1];
1254         hits[2]=p[2];
1255         hits[3]=0.; // this hit has no energy loss
1256         // Get also the track time for pileup simulation
1257         hits[4]=gMC->TrackTime();
1258
1259         AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  
1260       }
1261     //
1262
1263        gMC->TrackPosition(p);
1264        hits[0]=p[0];
1265        hits[1]=p[1];
1266        hits[2]=p[2];
1267        hits[3]=0.; // this hit has no energy loss
1268        // Get also the track time for pileup simulation
1269        hits[4]=gMC->TrackTime();
1270
1271        AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  
1272     
1273     }
1274     else return;
1275   }  
1276   //-----------------------------------------------------------------
1277   //  charged particle is in the sensitive drift volume
1278   //-----------------------------------------------------------------
1279
1280   if(gMC->TrackStep() > 0){ 
1281
1282     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1283     nel=TMath::Min(nel,30); // 30 electrons corresponds to 1 keV
1284     //
1285     gMC->TrackPosition(p);
1286     hits[0]=p[0];
1287     hits[1]=p[1];
1288     hits[2]=p[2];
1289     hits[3]=(Float_t)nel;
1290
1291     // Add this hit
1292
1293     if (fHitType&&2){
1294       gMC->TrackMomentum(p);
1295       Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1296       Float_t precision =   (momentum>0.1) ? 0.002 :0.01;
1297       fTrackHits->SetHitPrecision(precision);
1298     }
1299
1300     // Get also the track time for pileup simulation
1301     hits[4]=gMC->TrackTime();
1302  
1303     AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
1304
1305   } // step>0 
1306   } //within sector's limits
1307   // Stemax calculation for the next step
1308   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1309   Float_t pp;
1310   TLorentzVector mom;
1311   gMC->TrackMomentum(mom);
1312   Float_t ptot=mom.Rho();
1313   Float_t betaGamma = ptot/gMC->TrackMass();
1314   
1315   Int_t pid=gMC->TrackPid();
1316   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1317     { 
1318       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1319     }
1320   else
1321     {
1322
1323       betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
1324       pp=kprim*BetheBloch(betaGamma); 
1325    
1326       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1327     }
1328   
1329   Double_t rnd = gMC->GetRandom()->Rndm();
1330   
1331   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1332   
1333   
1334 }
1335
1336 //_____________________________________________________________________________
1337 Float_t AliTPCv4::BetheBloch(Float_t bg)
1338 {
1339   //
1340   // Bethe-Bloch energy loss formula
1341   //
1342   const Double_t kp1=0.76176e-1;
1343   const Double_t kp2=10.632;
1344   const Double_t kp3=0.13279e-4;
1345   const Double_t kp4=1.8631;
1346   const Double_t kp5=1.9479;
1347
1348   Double_t dbg = (Double_t) bg;
1349
1350   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
1351
1352   Double_t aa = TMath::Power(beta,kp4);
1353   Double_t bb = TMath::Power(1./dbg,kp5);
1354
1355   bb=TMath::Log(kp3+bb);
1356   
1357   return ((Float_t)((kp2-aa-bb)*kp1/aa));
1358 }
1359
1360