The operator[] is replaced by At() or AddAt() in case of TObjArray.
[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 /*
17 $Log$
18 Revision 1.38  2001/05/08 16:03:06  kowal2
19 Geometry update according to the latest technical spec.
20
21 Revision 1.37  2001/04/27 15:23:07  kowal2
22 Correct materian in the central part of the inner containment vessel
23
24 Revision 1.36  2001/04/26 06:15:12  kowal2
25 Corrected bug in the inner containment vessel (cones)
26
27 Revision 1.35  2001/04/24 11:17:33  kowal2
28 New TPC geometry.
29
30 Revision 1.34  2001/04/23 10:20:18  hristov
31 Constant casted to avoid ambiguity
32
33 Revision 1.33  2001/04/20 08:16:47  kowal2
34 Protection against too small betaGamma. Thanks to Ivana and Yves.
35
36 Revision 1.32  2001/03/13 13:07:34  kowal2
37 Corrected bug in the TPC mother volume geometry.
38 Thanks to A. Morsch
39
40 Revision 1.31  2000/11/30 11:48:50  kowal2
41 TLorentzVector.h adde to satisfy the latest changes by Federico
42
43 Revision 1.30  2000/11/14 10:48:57  kowal2
44 Correct material used for TSA4. Thanks to J. Barbosa.
45
46 Revision 1.29  2000/11/06 17:24:10  kowal2
47 Corrected bug in the outer containment vessel and
48 the outer field cage geometry.
49 Thanks to J. Barbosa.
50
51 Revision 1.28  2000/11/02 16:55:24  kowal2
52 Corrected bug in the inner containment vessel geometry.
53 Thanks to J. Belikov
54
55 Revision 1.27  2000/11/02 07:24:11  kowal2
56 Correction in the TPC geometry.
57 Changes due to the new hit structure.
58
59 Revision 1.26  2000/10/05 16:16:29  kowal2
60 Corrections of the hit recording algorithm.
61
62 Revision 1.25  2000/10/02 21:28:18  fca
63 Removal of useless dependecies via forward declarations
64
65 Revision 1.24  2000/08/28 10:02:30  kowal2
66 Corrected bug in the StepManager
67
68 Revision 1.23  2000/07/10 20:57:39  hristov
69 Update of TPC code and macros by M.Kowalski
70
71 Revision 1.22  2000/06/30 12:07:50  kowal2
72 Updated from the TPC-PreRelease branch
73
74 Revision 1.21.2.4  2000/06/26 07:39:42  kowal2
75 Changes to obey the coding rules
76
77 Revision 1.21.2.3  2000/06/25 08:38:41  kowal2
78 Splitted from AliTPCtracking
79
80 Revision 1.21.2.2  2000/06/16 12:58:13  kowal2
81 Changed parameter settings
82
83 Revision 1.21.2.1  2000/06/09 07:15:07  kowal2
84
85 Defaults loaded automatically (hard-wired)
86 Optional parameters can be set via macro called in the constructor
87
88 Revision 1.21  2000/05/15 10:00:30  kowal2
89 Corrected bug in the TPC geometry, thanks to Ivana Hrivnacova
90
91 Revision 1.20  2000/04/17 09:37:33  kowal2
92 removed obsolete AliTPCDigitsDisplay.C
93
94 Revision 1.19.8.2  2000/04/10 08:31:52  kowal2
95
96 Different geometry for different sectors
97 Updated readout chambers
98 Some modifications to StepManager by J.Belikov
99
100 Revision 1.19.8.1  2000/04/10 07:56:53  kowal2
101 Not used anymore - removed
102
103 Revision 1.19  1999/11/04 17:28:07  fca
104 Correct barrel part of HV Degrader
105
106 Revision 1.18  1999/10/14 16:52:08  fca
107 Only use PDG codes and not GEANT ones
108
109 Revision 1.17  1999/10/08 06:27:23  fca
110 Corrected bug in the HV degrader geometry, thanks to G.Tabary
111
112 Revision 1.16  1999/10/04 13:39:54  fca
113 Correct array index problem
114
115 Revision 1.15  1999/09/29 09:24:34  fca
116 Introduction of the Copyright and cvs Log
117
118 */
119
120 //
121 ///////////////////////////////////////////////////////////////////////////////
122 //                                                                           //
123 //  Time Projection Chamber version 2 -- detailed TPC and slow simulation    //
124 //                                                                           //
125 //Begin_Html
126 /*
127 <img src="picts/AliTPCv2Class.gif">
128 */
129 //End_Html
130 //                                                                           //
131 //                                                                           //
132 ///////////////////////////////////////////////////////////////////////////////
133 #include <stdlib.h>
134
135 #include <TMath.h>
136
137 #include "AliTPCv2.h"
138 #include "AliTPCDigitsArray.h"
139 #include "AliRun.h"
140 #include "AliMC.h"
141 #include "AliConst.h"
142 #include "AliPDG.h"
143 #include "AliTPCParam.h"
144 #include "AliTPCParamSR.h"
145 #include "AliTPCTrackHits.h"
146 #include "TLorentzVector.h"
147
148
149 ClassImp(AliTPCv2)
150  
151 //_____________________________________________________________________________
152 AliTPCv2::AliTPCv2(const char *name, const char *title) :
153   AliTPC(name, title) 
154 {
155   //
156   // Standard constructor for Time Projection Chamber version 2
157   //
158   fIdSens=0;
159   fIdLSec=0;
160   fIdUSec=0;
161
162   SetBufferSize(128000);
163
164   SetGasMixt(2,20,10,-1,0.9,0.1,0.); // Ne-CO2 90-10
165
166   // Default sectors
167
168   SetSecAL(4);
169   SetSecAU(4);
170   SetSecLows(1,  2,  3, 19, 20, 21);
171   SetSecUps(37, 38, 39, 37+18, 38+18, 39+18, -1, -1, -1, -1, -1, -1);
172   SetSens(1); // sensitive strips set 
173
174   if (fTPCParam)
175      fTPCParam->Write(fTPCParam->GetTitle());
176 }
177  
178 //_____________________________________________________________________________
179 void AliTPCv2::CreateGeometry()
180 {
181   //
182   // Create the geometry of Time Projection Chamber version 2
183   //
184   //Begin_Html
185   /*
186     <img src="picts/AliTPC.gif">
187   */
188   //End_Html
189   //Begin_Html
190   /*
191     <img src="picts/AliTPCv2Tree.gif">
192   */
193   //End_Html
194
195
196   Int_t *idtmed = fIdtmed->GetArray();
197
198   Float_t dm[50];
199   Int_t idrotm[120];
200
201   Int_t nRotMat = 0;
202
203   Int_t i,ifl1=0;
204
205   // number of sectors
206
207   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
208   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
209   
210   // --------------------------------------------------- 
211   //        sector specification check 
212   // --------------------------------------------------- 
213   if (fSecAL >= 0) {
214     ifl1 = 0;
215     
216     for (i = 0; i < 6; ++i) {
217       if (fSecLows[i] >= 0 && fSecLows[i] < 2*nInnerSector) {
218         ifl1 = 1;
219         printf("%s: *** SECTOR %d selected\n",ClassName(),fSecLows[i]);
220       }
221     }
222
223   } else {
224     printf("%s: *** ALL LOWER SECTORS SELECTED ***\n",ClassName());
225     ifl1 = 1;
226   }
227
228   if (ifl1 == 0) {
229     printf("%s: *** ERROR: AT LEAST ONE LOWER SECTOR MUST BE SPECIFIED ***\n",ClassName());
230     printf("%s: !!! PROGRAM STOPPED !!!\n",ClassName());
231     exit(1);
232   }
233
234   if (fSecAU >= 0) {
235     
236     for (i = 0; i < 12; ++i) {
237       if (fSecUps[i] > 2*nInnerSector-1 && 
238           fSecUps[i] < 2*(nInnerSector+nOuterSector)) {
239         printf("%s: *** SECTOR %d selected\n",ClassName(),fSecUps[i]);
240       }
241     }
242     
243   } else {
244     printf("%s: *** ALL UPPER SECTORS SELECTED ***\n",ClassName());
245   }
246   
247  
248
249   //--------------------------------------------------------------------
250
251   //
252   //  Mother volume TPC (Air) - all volumes will be positioned in it
253   //
254
255   dm[0]=0.;
256   dm[1]=360.;
257   dm[2]=8.;
258
259   //
260
261   dm[3]=-283.7;
262   dm[4]=65.6;
263   dm[5]=278.;
264
265   //
266
267   dm[6]=-253.6;
268   dm[7]=65.6;
269   dm[8]=278.;
270
271   //
272
273   dm[9]=-73.3;
274   dm[10]=60.9;
275   dm[11]=278.;  
276
277   //
278
279   dm[12]=-73.3;
280   dm[13]=56.9;
281   dm[14]=278.;
282
283   //
284
285   dm[15]=73.3;
286   dm[16]=56.9;
287   dm[17]=278.;
288
289   //
290
291   dm[18]=73.3;
292   dm[19]=60.9;
293   dm[20]=278.;
294
295   //
296
297   dm[21]=253.6;
298   dm[22]=65.6;
299   dm[23]=278.;
300
301   //
302
303   dm[24]=283.7;
304   dm[25]=65.6;
305   dm[26]=278.;
306   
307   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,27);
308
309   // outer part
310
311   //-------------------------------------------------------------------
312   //   Tpc Outer INsulator (CO2) - contains cont. vessel and field cage
313   //-------------------------------------------------------------------
314
315   dm[0]= 0.;
316   dm[1]= 360.;
317   dm[2]= 6.;
318
319   //
320
321   dm[3]=-253.6;
322   dm[4]=258.;
323   dm[5]=275.5;
324
325   //
326
327   dm[6]=-250.6;
328   dm[7]=258.;
329   dm[8]=275.5; 
330
331   //
332
333   dm[9]=-250.6;
334   dm[10]=258.;
335   dm[11]=278.;
336
337   //
338
339   dm[12]=253.6;
340   dm[13]=258.;
341   dm[14]=278.; 
342
343   //
344
345   dm[15]=253.6;
346   dm[16]=264.8;
347   dm[17]=278.;  
348
349   //
350
351   dm[18]=256.6;
352   dm[19]=264.8;
353   dm[20]=278.;
354
355   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
356
357   //----------------------------------------------------------------
358   // Tpc Outer Contaiment Vessel  
359   //  mother volume - Al, daughters - composite (sandwich)
360   //----------------------------------------------------------------
361
362   dm[0]=0.;
363   dm[1]=360.;
364   dm[2]=6.;
365
366   //
367
368   dm[3]=-250.6;
369   dm[4]=270.4;
370   dm[5]=278.;
371
372   //
373
374   dm[6]=-247.6;
375   dm[7]=270.4;
376   dm[8]=278.; 
377
378   //
379
380   dm[9]=-247.6;
381   dm[10]=274.8124;
382   dm[11]=278.;
383
384   //
385
386   dm[12]=253.6;
387   dm[13]=274.8124;
388   dm[14]=278.;
389
390   //
391
392   dm[15]=253.6;
393   dm[16]=264.8;
394   dm[17]=278.;
395
396   //
397
398   dm[18]=256.6;
399   dm[19]=264.8;
400   dm[20]=278.;
401
402   gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,21);
403
404   // Daughter volumes - sandwich
405
406   // Tpc SAndwich 1 - Al
407
408   dm[0]=274.8124;
409   dm[1]=278.;
410   dm[2]=252.1;
411
412   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
413
414   // Tpc SAndwich 2 - epoxy glue (I use Lexan)
415
416   dm[0] += 5.e-3;
417   dm[1] -= 5.e-3;
418
419   gMC->Gsvolu("TSA2","TUBE",idtmed[14],dm,3);
420
421   // Tpc SAndwich 3 - Tedlar
422
423   dm[0] += 0.01;
424   dm[1] -= 0.01;
425   
426   gMC->Gsvolu("TSA3","TUBE",idtmed[9],dm,3);
427
428
429   // Tpc SAndwich 4 - fiber glass (G10)
430
431   dm[0] += 3.8e-3;
432   dm[1] -= 3.8e-3;
433
434   gMC->Gsvolu("TSA4","TUBE",idtmed[12],dm,3);  
435
436   // Tpc SAndwich 5 - NOMEX honeycomb
437
438   dm[0] += 0.075;
439   dm[1] -= 0.075;   
440   
441   gMC->Gsvolu("TSA5","TUBE",idtmed[6],dm,3);
442
443   // 5->4->3->2->1->TCOV
444
445
446   gMC->Gspos("TSA5",1,"TSA4",0.,0.,0.,0,"ONLY");
447   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
448   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
449   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");  
450
451   gMC->Gspos("TSA1",1,"TOCV",0.,0.,3.,0,"ONLY");
452
453   // TCOV-> TOIN
454
455   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
456
457   //-------------------------------------------------------
458   //  Tpc Outer Field Cage
459   //  mother volume - Al, daughters - composite (sandwich)
460   //-------------------------------------------------------
461
462   dm[0]=0.;
463   dm[1]=360.;
464   dm[2]=6.;
465
466   //
467
468   dm[3]=-253.6;
469   dm[4]=258.;
470   dm[5]=275.5;
471
472   //
473
474   dm[6]=-250.6;
475   dm[7]=258.;
476   dm[8]=275.5;
477
478   //
479
480   dm[9]=-250.6;
481   dm[10]=258.;
482   dm[11]=260.0476;
483
484   //
485
486   dm[12]=250.6;
487   dm[13]=258.;
488   dm[14]=260.0476;
489
490   //
491
492   dm[15]=250.6;
493   dm[16]=258.;
494   dm[17]=275.5;
495
496   //
497
498   dm[18]=253.6;
499   dm[19]=258.;
500   dm[20]=275.5;
501
502   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
503
504   // Daughter volumes 
505
506   // Tpc SAndwich 6 - Tedlar
507
508   dm[0]= 258.;
509   dm[1]= 260.0476;
510   dm[2]= 252.1;
511
512   gMC->Gsvolu("TSA6","TUBE",idtmed[9],dm,3);
513
514   // Tpc SAndwich 7 - fiber glass
515
516   dm[0] += 3.8e-3;
517   dm[1] -= 3.8e-3;
518
519   gMC->Gsvolu("TSA7","TUBE",idtmed[12],dm,3);
520
521
522   // Tpc SAndwich 8 - NOMEX
523
524   dm[0] += 0.02;
525   dm[1] -= 0.02;
526
527   gMC->Gsvolu("TSA8","TUBE",idtmed[6],dm,3);    
528
529   // 8->7->6->TOFC
530
531   gMC->Gspos("TSA8",1,"TSA7",0.,0.,0.,0,"ONLY");
532   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY"); 
533   gMC->Gspos("TSA6",1,"TOFC",0.,0.,0.,0,"ONLY");
534
535   // TOFC->TOIN
536
537   gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
538
539   // TOIN->TPC
540
541   gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
542
543   // inner part
544
545   //--------------------------------------------------------------------
546   // Tpc Inner INsulator (CO2) - inner f.c. will be placed there
547   // Inner containment vessel will be placed directly in the TPC
548   //-------------------------------------------------------------------- 
549
550   dm[0]=0.;
551   dm[1]=360.;
552   dm[2]=4.;
553
554   // 
555
556   dm[3]=-253.6;
557   dm[4]=65.9;
558   dm[5]=79.2;
559
560   //
561
562   dm[6]=-73.3;
563   dm[7]=61.2;
564   dm[8]=79.2;  
565
566   //
567
568   dm[9]=73.3;
569   dm[10]=61.2;
570   dm[11]=79.2;
571
572   //
573
574   dm[12]=253.6;
575   dm[13]=65.9;
576   dm[14]=79.2;
577
578   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,15);
579
580   // the middle part of the F.C. is thinner - carve out the strip - Ne-CO2
581
582   dm[0]=79.16;
583   dm[1]=79.2;
584   dm[2]=88.;
585
586   gMC->Gsvolu("TII1","TUBE",idtmed[1],dm,3);
587
588   gMC->Gspos("TII1",1,"TIIN",0.,0.,0.,0,"ONLY");
589
590   //-----------------------------------------------------
591   // Tpc Inner Field Cage
592   // mother volume - Al, daughters - composite (sandwich)
593   //------------------------------------------------------
594
595   dm[0]=0.;
596   dm[1]=360.;
597   dm[2]=10.;
598
599   //
600
601   dm[3]=-253.6;
602   dm[4]=70.3;
603   dm[5]=79.2;
604
605   //
606
607   dm[6]=-250.6;
608   dm[7]=70.3;
609   dm[8]=79.2;
610
611   //
612
613   dm[9]=-250.6;
614   dm[10]=77.0524;
615   dm[11]=79.2;
616
617   //
618
619   dm[12]=-88.;
620   dm[13]=77.0524;
621   dm[14]=79.2;
622
623   //
624
625   dm[15]=-88.;
626   dm[16]=77.0924;
627   dm[17]=79.16;
628
629   //
630
631   dm[18]=88.;
632   dm[19]=77.0924;
633   dm[20]=79.16;
634
635   //
636
637   dm[21]=88.;
638   dm[22]=77.0524;
639   dm[23]=79.2;
640
641   //
642
643   dm[24]=250.6;
644   dm[25]=77.0524;
645   dm[26]=79.2;
646
647   //
648
649   dm[27]=250.6;
650   dm[28]=70.3;
651   dm[29]=79.2;
652
653   //
654
655   dm[30]=253.6;
656   dm[31]=70.3;
657   dm[32]=79.2;
658
659   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,33);
660
661   // daughter volumes - central part
662
663   // Tpc Sandwich 9 -Tedlar
664
665   dm[0]=77.0924;
666   dm[1]=79.16;
667   dm[2]=88.;
668
669   gMC->Gsvolu("TSA9","TUBE",idtmed[9],dm,3); 
670
671   // Tpc Sandwich 10 - fiber glass (G10) 
672
673   dm[0] += 3.8e-3;
674   dm[1] -= 3.8e-3;
675
676   gMC->Gsvolu("TS10","TUBE",idtmed[12],dm,3);
677
678   // Tpc Sandwich 11 - NOMEX
679
680   dm[0] += 0.03;
681   dm[1] -= 0.03; 
682
683   gMC->Gsvolu("TS11","TUBE",idtmed[6],dm,3);
684
685   // 11->10->9->TIFC
686
687   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
688   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
689
690   gMC->Gspos("TSA9",1,"TIFC",0.,0.,0.,0,"ONLY");
691
692   // daughter volumes - outer parts (reinforced)
693
694   // Tpc Sandwich 12 -Tedlar
695
696   dm[0]=77.0524;
697   dm[1]=79.2;
698   dm[2]=82.05;
699
700   gMC->Gsvolu("TS12","TUBE",idtmed[9],dm,3);
701
702   // Tpc Sandwich 13 - fiber glass (G10) 
703
704   dm[0] += 3.8e-3;
705   dm[1] -= 3.8e-3;
706
707   gMC->Gsvolu("TS13","TUBE",idtmed[12],dm,3);
708
709   // Tpc Sandwich 14 - NOMEX
710
711   dm[0] += 0.07;
712   dm[1] -= 0.07;  
713
714   gMC->Gsvolu("TS14","TUBE",idtmed[6],dm,3);
715
716   // 14->13->12->TIFC
717
718   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
719   gMC->Gspos("TS13",1,"TS12",0.,0.,0.,0,"ONLY"); 
720
721   gMC->Gspos("TS12",1,"TIFC",0.,0.,170.05,0,"ONLY");
722   gMC->Gspos("TS12",2,"TIFC",0.,0.,-170.05,0,"ONLY"); 
723
724   // place this inside the inner insulator
725
726   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
727
728   // and now in the TPC...
729
730   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
731
732   //---------------------------------------------------------
733   // Tpc Inner Containment vessel - Cones
734   //---------------------------------------------------------
735
736   dm[0]=0.;
737   dm[1]=360.;
738   dm[2]=8.;
739
740   //
741
742   dm[3]=71.8;
743   dm[4]=56.9;
744   dm[5]=59.4;
745
746   //
747
748   dm[6]=73.;
749   dm[7]=56.9;
750   dm[8]=59.4;
751
752   //
753
754   dm[9]=73.;
755   dm[10]=56.9;
756   dm[11]=61.2;
757
758   //
759
760   dm[12]=73.3;
761   dm[13]=56.9;
762   dm[14]=61.2;
763
764   //
765    
766   dm[15]=73.3;
767   dm[16]=60.9;
768   dm[17]=61.2;
769
770   // 
771
772   dm[18]=253.6;
773   dm[19]=65.6;
774   dm[20]=65.9; 
775
776   //
777
778   dm[21]=253.6;
779   dm[22]=65.6;
780   dm[23]=74.6;
781
782   //
783
784   dm[24]=256.6;
785   dm[25]=65.6;
786   dm[26]=74.6;
787
788   gMC->Gsvolu("TICC","PCON",idtmed[4],dm,27);
789
790   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
791
792   // reflection matrix
793   
794   theta1 = 90.;
795   phi1   = 0.;
796   theta2 = 90.;
797   phi2   = 270.;
798   theta3 = 180.;
799   phi3   = 0.;
800
801   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
802
803   gMC->Gspos("TICC",1,"TPC ",0.,0.,0.,0,"ONLY");
804   gMC->Gspos("TICC",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
805
806
807   //---------------------------------------------------------
808   // Tpc Inner Containment vessel - Middle part -Al
809   //---------------------------------------------------------
810
811   dm[0]=0.;
812   dm[1]=360.;
813   dm[2]=6.;
814
815   //
816
817   dm[3]=-71.6;
818   dm[4]=60.2;
819   dm[5]=61.2;
820
821   //
822
823   dm[6]=-69.1;
824   dm[7]=60.2;
825   dm[8]=61.2;
826
827   //
828
829   dm[9]=-69.1;
830   dm[10]=60.6224;
831   dm[11]=61.2;  
832
833   //
834
835   dm[12]=69.1;
836   dm[13]=60.6224;
837   dm[14]=61.2;
838
839   //
840
841   dm[15]=69.1;
842   dm[16]=60.2;
843   dm[17]=61.2;
844
845   //
846
847   dm[18]=71.6;
848   dm[19]=60.2;
849   dm[20]=61.2;
850
851   gMC->Gsvolu("TICM","PCON",idtmed[4],dm,21);
852
853   // Tpc Sandwich 15 - Al
854
855   dm[0]=60.6224;
856   dm[1]=61.2;
857   dm[2]=70.1;
858
859   gMC->Gsvolu("TS15","TUBE",idtmed[4],dm,3);
860
861   // Tpc Sandwich 16 -  epoxy glue
862
863   dm[0] += 5.e-3;
864   dm[1] -= 5.e-3;
865
866   gMC->Gsvolu("TS16","TUBE",idtmed[14],dm,3);
867
868   // Tpc Sandwich 17 - Tedlar
869
870   dm[0] += 0.01;
871   dm[1] -= 0.01;
872
873   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
874
875   // Tpc Sandwich 18 - carbon fiber
876
877   dm[0] += 3.8e-3;
878   dm[1] -= 3.8e-3;
879
880   gMC->Gsvolu("TS18","TUBE",idtmed[15],dm,3);  
881
882   // Tpc Sandwich 19 - Nomex
883
884   dm[0] += 0.02;
885   dm[1] -= 0.02;
886
887   gMC->Gsvolu("TS19","TUBE",idtmed[6],dm,3); 
888
889   // 19->18->17->16->15-> TICM
890
891   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY"); 
892   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
893   gMC->Gspos("TS17",1,"TS16",0.,0.,0.,0,"ONLY");
894   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
895
896   gMC->Gspos("TS15",1,"TICM ",0.,0.,0.,0,"ONLY");
897  
898
899   // TPc inner cont. vessel Joints
900
901   dm[0]=60.2;
902   dm[1]=61.2;
903   dm[2]=0.5;
904
905   gMC->Gsvolu("TPJ1","TUBE",idtmed[4],dm,3);
906
907   gMC->Gspos("TPJ1",1,"TPC ",0.,0.,72.3,0,"ONLY");
908   gMC->Gspos("TPJ1",2,"TPC ",0.,0.,-72.3,0,"ONLY");
909
910   //
911
912   dm[0]=0.;
913   dm[1]=360.;
914   dm[2]=4.;
915
916   //
917
918   dm[3]=70.8;
919   dm[4]=58.4;
920   dm[5]=60.1;
921
922   //
923
924   dm[6]=71.2;
925   dm[7]=58.4;
926   dm[8]=60.1;
927
928   //
929
930   dm[9]=71.2;
931   dm[10]=58.4;
932   dm[11]=59.4;
933
934   //
935
936   dm[12]=71.6;
937   dm[13]=58.4;
938   dm[14]=59.4;
939
940   gMC->Gsvolu("TPJ2","PCON",idtmed[4],dm,15);
941
942   gMC->Gspos("TPJ2",1,"TPC ",0.,0.,0.,0,"ONLY");
943   gMC->Gspos("TPJ2",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
944
945
946
947   // Tpc Inner Containment vessel Seal (Viton, I use Lexan for a time being)
948
949   dm[0]=58.4;
950   dm[1]=61.2;
951   dm[2]=0.1;
952
953   gMC->Gsvolu("TICS","TUBE",idtmed[14],dm,3);
954
955   gMC->Gspos("TICS",1,"TPC ",0.,0.,71.7,0,"ONLY");
956   gMC->Gspos("TICS",2,"TPC ",0.,0.,-71.7,0,"ONLY"); 
957
958   // TICM -> TPC
959
960   gMC->Gspos("TICM",1,"TPC ",0.,0.,0.,0,"ONLY");
961
962   //
963
964   nRotMat++; // prepare for the next rotation matrix 
965
966   //---------------------------------------------------------
967   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
968   //  and its daughters (HV membrane, rods, readout chambers)
969   //---------------------------------------------------------
970
971   dm[0]= 79.2;
972   dm[1]= 258.0;
973   dm[2]= 253.6;
974
975   gMC->Gsvolu("TDGN","TUBE",idtmed[1],dm,3); 
976
977   // sector opening angles
978
979   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
980   Float_t outerOpenAngle = fTPCParam->GetOuterAngle();
981
982   // sector angle shift
983
984   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
985
986
987   // All above parameters are identical for inner and outer
988   // sectors. The distinction is kept for the historical reasons
989   // and eventually will disappear.
990
991   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
992   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
993   Float_t space;
994
995   //-------------------------------------------------------------------------
996   //   Tpc Inner Readout Chambers 
997   //-------------------------------------------------------------------------
998
999   dm[0]= 14.483;
1000   dm[1]= 23.3345; 
1001   dm[2]= 1.6; // thickness
1002   dm[3]= 25.1;
1003
1004   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
1005
1006   // this volume will be positioned in the empty space
1007   // of the end-cap to avoid overlaps
1008
1009   dm[0]= 13.7305;
1010   dm[1]= 21.1895;
1011   dm[2]= 2.25;
1012   dm[3]= 21.15;
1013
1014   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
1015
1016
1017   //------------------------------------------------
1018   // Tpc Inner readout chamber Pad Plane
1019   //------------------------------------------------
1020
1021   dm[0]= 14.483;
1022   dm[1]= 23.3345;
1023   dm[2]= 0.5;
1024   dm[3]= 25.1;
1025
1026   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
1027
1028   // 
1029
1030   dm[0] -= 1.218511934;
1031   dm[1] -= 1.218511934;
1032   dm[2] = 0.35;
1033
1034   gMC->Gsvolu("TIC3","TRD1",idtmed[1],dm,4);
1035
1036   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
1037
1038   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
1039
1040
1041   //----------------------------------------------
1042   // Tpc Readout Chambers Empty spaces - for both
1043   // inner and outer sectors
1044   //----------------------------------------------
1045
1046   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
1047
1048   // Inner sector - 4 spaces
1049
1050
1051   dm[3] = 4.7625;
1052   dm[0] = 12.472;
1053
1054   Float_t rr = 90.52;
1055   Float_t zz;
1056
1057   zz= -12.7875;
1058   
1059   space = rr*tanAlpha-dm[0];
1060
1061   for(Int_t nsLow=0;nsLow<4;nsLow++){
1062
1063     rr += 9.525;
1064     dm[1]= rr*tanAlpha - space;  
1065
1066     dm[2]=0.8;
1067
1068     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
1069
1070     //
1071
1072     dm[2] = 1.2;
1073
1074     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
1075
1076     rr += 0.4;
1077     dm[0] = rr*tanAlpha - space;
1078     zz += (0.4+9.525); 
1079
1080   }
1081
1082   dm[0]= 12.472;
1083   // dm[1] - this is the dm[1] from the previous TRCE
1084   dm[2]= 1.05;
1085   dm[3]= 19.65;
1086
1087   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.2,0.,0,"ONLY",dm,4);   
1088
1089   //
1090   // TPc Space for Connectors
1091   //
1092
1093   dm[0]= .3;
1094   dm[1]= .3;
1095   dm[2]= 4.5;
1096
1097   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
1098
1099   // TPC Connectors
1100
1101   dm[0]= .25;
1102   dm[1]= .15;
1103   dm[2]= 3.75;
1104
1105   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3); 
1106
1107   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1108
1109   zz = -12.7875;
1110
1111
1112   Float_t alpha;
1113   Float_t astep;
1114
1115   // inner part of the inner sector - 2 x 20 holes
1116   
1117   astep = 20.00096874/19.;
1118
1119   alpha = 10.00048437-astep;
1120
1121   Float_t x1,x2;
1122
1123     x1 = 13.31175725;
1124     x1 -= 0.996357832; 
1125
1126     x2 = 15.06180253;
1127     x2 -= 1.163028812;
1128
1129   Int_t ncon;
1130
1131   for(ncon=0;ncon<20;ncon++){
1132
1133     phi1 = 0.;
1134     theta1 = 90.+alpha;
1135     phi2=90.;
1136     theta2 = 90.;
1137     phi3 = (alpha>0) ? 0. : 180.;
1138     theta3 = TMath::Abs(alpha);
1139
1140     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1141
1142  
1143
1144     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1145     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1146
1147
1148     x1 -= 1.296357833;
1149     x2 -= 1.463028812;
1150
1151     alpha -= astep;   
1152     nRotMat++; 
1153
1154   }
1155
1156   // outer part of the inner sector - 2 x 25 holes
1157
1158    astep = 20.00096874/24.; 
1159    alpha = 10.00048437-astep;
1160
1161    x1 = 16.81184781;
1162    x1 -= 1.016295986;
1163
1164    x2 = 18.5618931;
1165    x2 -= 1.150914854;
1166
1167   for(ncon=0;ncon<25;ncon++){
1168
1169     phi1 = 0.;
1170     theta1 = 90.+alpha;
1171     phi2=90.;
1172     theta2 = 90.;
1173     phi3 = (alpha>0) ? 0. : 180.;
1174     theta3 = TMath::Abs(alpha);
1175
1176     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1177
1178  
1179
1180     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1181     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1182
1183
1184     x1 -= 1.316295986;
1185     x2 -= 1.450914854;
1186
1187     alpha -= astep;   
1188     nRotMat++; 
1189
1190   }  
1191
1192   //--------------------------------------------------------------------------
1193   //  TPC Outer Readout Chambers
1194   //  this is NOT a final design
1195   //--------------------------------------------------------------------------
1196
1197   dm[0]= 23.3875;
1198   dm[1]= 43.524;
1199   dm[2]= 1.5; //thickness
1200   dm[3]= 57.1;
1201
1202   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1203
1204   //------------------------------------------------
1205   // Tpc Outer readout chamber Pad Plane
1206   //------------------------------------------------
1207
1208   dm[2]= 0.5;
1209
1210   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1211
1212   dm[0] -= 1.218511934;
1213   dm[1] -= 1.218511934;
1214   dm[2] = 0.35;
1215
1216   gMC->Gsvolu("TOC3","TRD1",idtmed[1],dm,4);
1217
1218   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1219
1220   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1221
1222   // empty space
1223
1224   dm[0]= 21.035;
1225   dm[1]= 38.7205;
1226   dm[2]= 0.7; 
1227   dm[3]= 50.15;
1228
1229   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);  
1230
1231   dm[0]= 22.2935;
1232   dm[1]= 40.5085;
1233   dm[2]= 2.25;
1234   dm[3]= 51.65;
1235
1236   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1237
1238   dm[0]= 21.35;
1239   dm[1]= 38.7205;
1240   dm[2]= 2.25;
1241   dm[3]= 50.15;
1242
1243   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1244
1245   //-----------------------------------------------
1246   // Tpc Services Support Wheel
1247   //-----------------------------------------------
1248
1249   dm[0]=0.;
1250   dm[1]=360.;
1251   dm[2]=18.;
1252   dm[3]=2.;
1253
1254   dm[4]= -5.;
1255   dm[5]= 77.017;
1256   dm[6]= 255.267;
1257
1258   dm[7]= 5.;
1259   dm[8]= dm[5];
1260   dm[9]= dm[6];
1261
1262   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1263
1264   // Tpc Services Wheel Cover
1265
1266   dm[4]= -0.5;
1267   dm[7]= 0.5;
1268
1269   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1270
1271   // Tpc Service wheel Cover Empty space
1272    
1273   dm[0]= 10.99;
1274   dm[1]= 39.599;
1275   dm[2]= .5;
1276   dm[3]= 81.125;
1277
1278   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1279
1280   // Tpc services Wheel Empty Spaces
1281
1282   dm[0]= 13.18017507;
1283   dm[1]= 44.61045938;
1284   dm[2]= 4.;
1285   dm[3]= 89.125;
1286
1287   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1288
1289   // Tpc Services Wheel Bars
1290
1291   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1292
1293   // bars-> TWES
1294
1295   dm[2]= 4.;
1296   dm[3]= .4;
1297
1298   dm[0]= 13.8149522;
1299   dm[1]= 13.95601379;
1300   
1301   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1302
1303   dm[0]= 43.83462067; 
1304   dm[1]= 43.97568225;
1305
1306   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1307
1308   // TPc ELectronics - right now 30% X0 Si
1309
1310   dm[0]= 14.03813696;
1311   dm[1]= 43.3524075;
1312   dm[2]= 1.404;
1313   dm[3]= 83.125;
1314
1315   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1316   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1317
1318   //--------------------------------------------------------------------------
1319   //  End caps
1320   //--------------------------------------------------------------------------
1321
1322   // TPc Main Wheel - Al
1323
1324   dm[0]= 74.9;
1325   dm[1]= 264.4;
1326   dm[2]= 3.0;
1327
1328   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1329
1330   //--------------------------------------------------------------------------
1331   //  Tpc Empty Space for the Readout chambers
1332   //--------------------------------------------------------------------------  
1333
1334   Float_t rLow= 86.2;
1335   Float_t rUp= 243.5;
1336   Float_t dR = 0.5*(rUp-rLow);
1337
1338   space= 1.5/cosAlpha; // wheel ribs are 3.0 cm wide
1339
1340   dm[0]= rLow*tanAlpha-space;
1341   dm[1]= rUp*tanAlpha-space;
1342   dm[2] = 3.0;
1343   dm[3]= dR;
1344
1345   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1346
1347   // TIC1->TESR
1348
1349   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1350
1351   // TOC1->TESR
1352
1353   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1354
1355   // Tpc Empty Space Bars - Al (daughters of TESR)
1356
1357   Float_t zBar;
1358
1359   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1360
1361   // lower bar
1362
1363   dm[0]= rLow*tanAlpha-space;
1364   dm[1]= 88.7*tanAlpha-space;
1365   dm[2]= 2.25;
1366   dm[3]= 1.275;
1367
1368   zBar = -dR+dm[3];
1369
1370   gMC->Gsposp("TESB",1,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1371
1372   // middle bar
1373
1374   dm[0]= 131.65*tanAlpha-space;
1375   dm[1]= 136.5*tanAlpha-space;
1376   dm[3]= 2.425;
1377
1378   zBar = -dR +131.65+dm[3]-rLow;
1379
1380   gMC->Gsposp("TESB",2,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);  
1381
1382   // upper bar
1383
1384   dm[0]= 240.4*tanAlpha-space;
1385   dm[1]= rUp*tanAlpha-space;
1386   dm[3]= 1.55;
1387
1388   zBar = dR-dm[3];
1389
1390   gMC->Gsposp("TESB",3,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1391
1392   //------------------------------------------------------
1393   //  TPc Lower "S" Sectors 
1394   //------------------------------------------------------
1395
1396
1397   Float_t inSecLowEdge = fTPCParam->GetInnerRadiusLow();
1398   Float_t inSecUpEdge =  fTPCParam->GetInnerRadiusUp();
1399
1400   dm[0] = inSecLowEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1401   dm[1] = inSecUpEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1402   dm[2] = 0.5*(250. - 5.e-3);
1403   dm[3] = 0.5*(inSecUpEdge-inSecLowEdge);  
1404
1405   gMC->Gsvolu("TPLS", "TRD1", idtmed[2], dm, 4); // sensitive 
1406
1407
1408   //----------------------------------------------------------
1409   //  TPc Upper Sectors
1410   //----------------------------------------------------------
1411
1412   Float_t ouSecLowEdge = fTPCParam->GetOuterRadiusLow();
1413   Float_t ouSecUpEdge = fTPCParam->GetOuterRadiusUp();
1414
1415   dm[0] = ouSecLowEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;  
1416   dm[1] = ouSecUpEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;  
1417   dm[2] = 0.5*(250. - 5.e-3);
1418   dm[3] = 0.5*(ouSecUpEdge-ouSecLowEdge);
1419
1420   gMC->Gsvolu("TPUS", "TRD1", idtmed[2], dm, 4); // sensitive
1421
1422
1423
1424   // sensitive strips
1425
1426     gMC->Gsvolu("TPSS","TRD1",idtmed[2],dm,0); // sensitive
1427
1428     Int_t nofStrips,nstr;
1429     Float_t r1,r2,zs;
1430     Float_t stripThick = 0.01; // 100 microns
1431     Float_t deadSpace;
1432
1433     // inner sector
1434
1435
1436     // if all lower sectors selected define only 1 strip
1437
1438     nofStrips=((fSecAL <0)||(fSecAL>=0 && fSens<0)) ? 1 : fTPCParam->GetNRowLow(); 
1439     deadSpace = fTPCParam->GetInnerWireMount();
1440
1441     dm[2] = 0.5*(250. - 5.e-3);
1442     dm[3] = 0.5 * stripThick;
1443
1444     for(nstr=0;nstr<nofStrips;nstr++){
1445
1446       r1 = fTPCParam->GetPadRowRadiiLow(nstr);
1447       r2 = r1 + stripThick;     
1448       dm[0] = r1 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1449       dm[1] = r2 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1450       zs = -inSecLowEdge -0.5*(inSecUpEdge-inSecLowEdge);
1451       zs += r1;
1452       zs += dm[3];
1453     
1454       gMC->Gsposp("TPSS", nstr+1, "TPLS", 0., 0., zs, 0, "ONLY", dm, 4);
1455
1456
1457     }
1458
1459     // strips only if several upper sectors selected end fSens > 0
1460
1461     if(fSecAU >=0 && fSens >0){
1462
1463     Int_t nsSave = nofStrips;
1464
1465     // outer sector
1466
1467     nofStrips = fTPCParam->GetNRowUp();
1468     deadSpace = fTPCParam->GetOuterWireMount();
1469
1470     dm[2] = 0.5*(250. - 5.e-3);
1471     dm[3] = 0.5 * stripThick;
1472
1473   
1474     for(nstr=0;nstr<nofStrips;nstr++){
1475     
1476       r1 = fTPCParam->GetPadRowRadiiUp(nstr); 
1477       r2 = r1 + stripThick;
1478       dm[0] = r1 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1479       dm[1] = r2 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1480       zs = -ouSecLowEdge -0.5*(ouSecUpEdge-ouSecLowEdge);
1481       zs += r1;
1482       zs += dm[3];
1483
1484       gMC->Gsposp("TPSS", nstr+1+nsSave, "TPUS", 0., 0., zs, 0, "ONLY", dm, 4);
1485
1486      }    
1487     }    
1488
1489
1490   //-------------------------------------------------------
1491   //  positioning of the empty spaces into the main wheel
1492   //  and readout chambers and sectors into the drift gas
1493   //-------------------------------------------------------
1494
1495   Float_t rCenter,xc,yc;
1496   Float_t rInner,rOuter; // center of the inner and outer chamber
1497
1498   rCenter = rLow+dR;
1499
1500   rInner = 108.07;
1501   rOuter = 190.68;
1502
1503
1504   for(Int_t ns=0; ns<nInnerSector;ns++){
1505
1506     phi1 = ns * innerOpenAngle + innerAngleShift;
1507     phi1 *= kRaddeg; // in degrees
1508
1509     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1510
1511     if (phi1 > 360.) phi1 -= 360.;
1512
1513     theta1 = 90.;
1514     phi2   = 90.;
1515     theta2 = 180.;
1516     phi3   = ns * innerOpenAngle + innerAngleShift;
1517     phi3 *= kRaddeg; // in degrees
1518
1519     phi3 = (Float_t)TMath::Nint(phi3);
1520       
1521     if(phi3 > 360.) phi3 -= 360.;
1522
1523     theta3 = 90.;
1524
1525     // "holes"->End plate
1526
1527     xc = rCenter*TMath::Cos(phi3*kDegrad);
1528     yc = rCenter*TMath::Sin(phi3*kDegrad);
1529
1530     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1531
1532     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1533
1534     // TSCE->TSWC (services wheel volumes)
1535
1536     xc = 166.142*TMath::Cos(phi3*kDegrad);
1537     yc = 166.142*TMath::Sin(phi3*kDegrad);
1538
1539     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1540     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1541
1542
1543     // readout chambers->TDGN (drift gas)
1544
1545     xc = rInner*TMath::Cos(phi3*kDegrad);
1546     yc = rInner*TMath::Sin(phi3*kDegrad);
1547
1548     gMC->Gspos("TIRC",ns+1,"TDGN",xc,yc,252.,idrotm[nRotMat],"ONLY");
1549
1550     // here lower sectors 
1551
1552     if(fSecAL <0){
1553
1554       // all lower sectors are positioned
1555
1556       gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1557       gMC->
1558         Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1559     }
1560     else{
1561
1562       // only selected sectors are positioned (up to 6 sectors)
1563
1564       for(Int_t sel=0;sel<6;sel++){
1565
1566         if(fSecLows[sel] == ns){
1567           gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1568         }
1569         else if(fSecLows[sel] == ns+nInnerSector){
1570          gMC->
1571          Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1572         }
1573       }
1574     } // lower sectors finished
1575
1576     
1577     xc = rOuter*TMath::Cos(phi3*kDegrad);
1578     yc = rOuter*TMath::Sin(phi3*kDegrad);
1579
1580     gMC->Gspos("TORC",ns+1,"TDGN",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1581
1582     // here upper sectors 
1583
1584     if(fSecAU <0){
1585
1586       // all upper sectors
1587
1588       gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1589       gMC->
1590         Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1591     }
1592     else{
1593
1594       // only selected sectors (up to 12)
1595
1596       for(Int_t sel=0;sel<12;sel++){
1597         if(fSecUps[sel] == ns+2*nInnerSector){
1598           gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1599         }         
1600         else if(fSecUps[sel] == ns+2*nInnerSector+nOuterSector){
1601          gMC->
1602           Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY"); 
1603         }
1604       }
1605     } // upper sectors finished
1606
1607
1608     nRotMat++;
1609
1610     theta2 = 0.; // reflection
1611
1612     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1613
1614     xc = rInner*TMath::Cos(phi3*kDegrad);
1615     yc = rInner*TMath::Sin(phi3*kDegrad);
1616
1617     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGN",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1618
1619     xc = rOuter*TMath::Cos(phi3*kDegrad);
1620     yc = rOuter*TMath::Sin(phi3*kDegrad);
1621
1622     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGN",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1623
1624     nRotMat++;
1625
1626   } 
1627   // TPMW->TPC
1628
1629   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1630   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[0],"ONLY");
1631
1632   //---------------------------------------------------------
1633   //  Tpc High Voltage Membrane - 100 microns of mylar
1634   //---------------------------------------------------------
1635
1636   dm[0]=82.8;
1637   dm[1]=252.;
1638   dm[2]=0.005;
1639
1640   gMC->Gsvolu("THVM","TUBE",idtmed[8],dm,3);
1641
1642   gMC->Gspos("THVM",1,"TDGN",0.,0.,0.,0,"ONLY");
1643
1644   // Tpc High Voltage membrane Holders
1645
1646   gMC->Gsvolu("THVH","TUBE",idtmed[4],dm,0);
1647
1648   
1649
1650   // inner
1651
1652   dm[0]=79.3;
1653   dm[1]=82.8;
1654   dm[2]=0.2;
1655
1656   gMC->Gsposp("THVH",1,"TDGN",0.,0.,0.,0,"ONLY",dm,3);
1657   
1658   // outer
1659
1660   dm[0]= 252.;
1661   dm[1]= 257.9;
1662   dm[2]= 0.4;
1663
1664   gMC->Gsposp("THVH",2,"TDGN",0.,0.,0.,0,"ONLY",dm,3);
1665
1666   //----------------------------------------------------------
1667   // TPc Support Rods - MAKROLON
1668   //----------------------------------------------------------
1669
1670   dm[0]= 0.9;
1671   dm[1]= 1.2;
1672
1673   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,0); // inner and outer rods differ
1674
1675
1676   for(Int_t nrod=0;nrod<18;nrod++){
1677     Float_t angle=innerOpenAngle*(Float_t)nrod;
1678
1679     xc=81.5*TMath::Cos(angle);
1680     yc=81.5*TMath::Sin(angle); 
1681
1682     dm[2]=126.7;
1683
1684     gMC->Gsposp("TPSR",nrod+1,"TDGN",xc,yc,126.9,0,"ONLY",dm,3); 
1685     gMC->Gsposp("TPSR",nrod+19,"TDGN",xc,yc,-126.9,0,"ONLY",dm,3);
1686
1687     dm[2]=126.6;
1688
1689     xc=254.25*TMath::Cos(angle);
1690     yc=254.25*TMath::Sin(angle);   
1691       
1692     // rod number 54 contans the HV cable
1693
1694     if(nrod<17) {
1695       gMC->Gsposp("TPSR",nrod+37,"TDGN",xc,yc,127.,0,"ONLY",dm,3);
1696       gMC->Gsposp("TPSR",nrod+54,"TDGN",xc,yc,-127.,0,"ONLY",dm,3);
1697     }
1698     
1699   }
1700
1701   //----------------------------------------------------------
1702   // Tpc High Voltage Rod - MAKROLON + Copper cable
1703   //----------------------------------------------------------
1704
1705   // rod with cable (Left)
1706
1707   dm[0]=0.;
1708   dm[1]=2.25;
1709   dm[2]=126.6;
1710
1711   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1712
1713   // HV cable
1714  
1715   dm[0]=0.;
1716   dm[1]=0.3;
1717   dm[2]=126.6;
1718
1719   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);  
1720
1721   // empty space
1722
1723   dm[0]=0.3;
1724   dm[1]=1.;
1725   dm[2]=126.6;
1726
1727   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1728
1729   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1730   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1731
1732   // rod without cable
1733
1734   dm[0]=1.8;
1735   dm[1]=2.25;
1736   dm[2]=126.6;
1737
1738   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1739
1740   gMC->Gspos("THVL",1,"TDGN",xc,yc,-127.,0,"ONLY");  
1741   gMC->Gspos("THVR",1,"TDGN",xc,yc,127.,0,"ONLY");
1742
1743   gMC->Gspos("TDGN",1,"TPC ",0.,0.,0.,0,"ONLY"); 
1744  
1745   // services wheel cover -> wheel
1746
1747
1748   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1749   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1750
1751
1752   // put the wheel into the TPC
1753
1754   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1755   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1756
1757   //
1758
1759   gMC->Gsord("TPMW",6);
1760   gMC->Gsord("TSSW",6);
1761   gMC->Gsord("TSWC",6);
1762   if(fSecAL >=0)  gMC->Gsord("TPLS",3);
1763   if(fSecAU >=0 && fSens >0)  gMC->Gsord("TPUS",3);
1764   gMC->Gsord("TDGN",6);
1765
1766   // put the TPC into ALIC (main mother volume)
1767
1768   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1769
1770  
1771
1772 } // end of function
1773  
1774 //_____________________________________________________________________________
1775 void AliTPCv2::DrawDetector()
1776 {
1777   //
1778   // Draw a shaded view of the Time Projection Chamber version 1
1779   //
1780
1781   // Set everything unseen
1782   gMC->Gsatt("*", "seen", -1);
1783   // 
1784   // Set ALIC mother transparent
1785   gMC->Gsatt("ALIC","SEEN",0);
1786   //
1787   // Set the volumes visible
1788   //
1789
1790   gMC->Gsatt("TPC ","SEEN",0);
1791   gMC->Gsatt("TOIN","SEEN",1);
1792   gMC->Gsatt("TOIN","COLO",7);
1793   gMC->Gsatt("TOCV","SEEN",1);
1794   gMC->Gsatt("TOCV","COLO",4);
1795   gMC->Gsatt("TSA1","SEEN",0);
1796   gMC->Gsatt("TSA2","SEEN",0);
1797   gMC->Gsatt("TSA3","SEEN",0);
1798   gMC->Gsatt("TSA4","SEEN",0);  
1799   gMC->Gsatt("TSA5","SEEN",0);
1800   gMC->Gsatt("TOFC","SEEN",1);
1801   gMC->Gsatt("TOFC","COLO",4);
1802   gMC->Gsatt("TSA6","SEEN",0);
1803   gMC->Gsatt("TSA7","SEEN",0);
1804   gMC->Gsatt("TSA8","SEEN",0);    
1805   gMC->Gsatt("TIIN","SEEN",1);
1806   gMC->Gsatt("TIIN","COLO",7);
1807   gMC->Gsatt("TII1","SEEN",0);
1808   gMC->Gsatt("TIFC","SEEN",1);
1809   gMC->Gsatt("TIFC","COLO",4);
1810   gMC->Gsatt("TSA9","SEEN",0); 
1811   gMC->Gsatt("TS10","SEEN",0);
1812   gMC->Gsatt("TS11","SEEN",0);
1813   gMC->Gsatt("TS12","SEEN",0);
1814   gMC->Gsatt("TS13","SEEN",0);
1815   gMC->Gsatt("TS14","SEEN",0);
1816   gMC->Gsatt("TICC","SEEN",0);
1817   gMC->Gsatt("TICM","SEEN",0);
1818   gMC->Gsatt("TS15","SEEN",0);
1819   gMC->Gsatt("TS16","SEEN",0);
1820   gMC->Gsatt("TS17","SEEN",0);
1821   gMC->Gsatt("TS18","SEEN",0);  
1822   gMC->Gsatt("TS19","SEEN",0); 
1823   gMC->Gsatt("TPJ1","SEEN",0);
1824   gMC->Gsatt("TPJ2","SEEN",0);
1825   gMC->Gsatt("TICS","SEEN",0);
1826   gMC->Gsatt("TDGN","SEEN",0); 
1827   gMC->Gsatt("TIRC","SEEN",0);
1828   gMC->Gsatt("TIC1","SEEN",1);
1829   gMC->Gsatt("TIPP","SEEN",0);
1830   gMC->Gsatt("TIC3","SEEN",0);
1831   gMC->Gsatt("TRCE","SEEN",0);
1832   gMC->Gsatt("TPSC","SEEN",0);
1833   gMC->Gsatt("TPCC","SEEN",0); 
1834   gMC->Gsatt("TORC","SEEN",0);
1835   gMC->Gsatt("TOPP","SEEN",0);
1836   gMC->Gsatt("TOC3","SEEN",0);
1837   gMC->Gsatt("TOC1","SEEN",1);
1838   gMC->Gsatt("TSSW","SEEN",1);
1839   gMC->Gsatt("TSWC","SEEN",1);
1840   gMC->Gsatt("TSSW","COLO",3);
1841   gMC->Gsatt("TSWC","COLO",3);
1842   gMC->Gsatt("TSCE","COLO",6);
1843   gMC->Gsatt("TSCE","SEEN",1);
1844   gMC->Gsatt("TWES","SEEN",0);
1845   gMC->Gsatt("TSWB","SEEN",0);
1846   gMC->Gsatt("TPEL","SEEN",0);
1847   gMC->Gsatt("TPMW","SEEN",1);
1848   gMC->Gsatt("TESR","SEEN",1);
1849   gMC->Gsatt("TPMW","COLO",12);
1850   gMC->Gsatt("TIC1","COLO",5);
1851   gMC->Gsatt("TOC1","COLO",5);
1852   gMC->Gsatt("TESB","SEEN",0);
1853   gMC->Gsatt("THVM","SEEN",1);
1854   gMC->Gsatt("THVM","COLO",11);
1855   gMC->Gsatt("THVH","SEEN",0);
1856   gMC->Gsatt("TPSR","SEEN",0); 
1857   gMC->Gsatt("THVL","SEEN",0);
1858   gMC->Gsatt("THVC","SEEN",0);  
1859   gMC->Gsatt("THVE","SEEN",0);
1860   gMC->Gsatt("THVR","SEEN",0);
1861   gMC->Gsatt("TPSS","SEEN",0);
1862   gMC->Gsatt("TPUS","SEEN",0);
1863   gMC->Gsatt("TPLS","SEEN",0);
1864
1865   //
1866   gMC->Gdopt("hide", "on");
1867   gMC->Gdopt("shad", "on");
1868   gMC->Gsatt("*", "fill", 7);
1869   gMC->SetClipBox(".");
1870   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1871   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1872   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1873   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1874   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1875   gMC->DefaultRange();
1876   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1877   gMC->Gdhead(1111, "Time Projection Chamber");
1878   gMC->Gdman(18, 4, "MAN");
1879   gMC->Gdopt("hide","off");
1880 }
1881
1882 //_____________________________________________________________________________
1883 void AliTPCv2::CreateMaterials()
1884 {
1885   //
1886   // Define materials for version 2 of the Time Projection Chamber
1887   //
1888  
1889   AliTPC::CreateMaterials();
1890 }
1891
1892 //_____________________________________________________________________________
1893 void AliTPCv2::Init()
1894 {
1895   //
1896   // Initialises version 2 of the TPC after that it has been built
1897   //
1898
1899   Int_t *idtmed = fIdtmed->GetArray();
1900   
1901   AliTPC::Init();
1902
1903
1904   
1905   fIdSens=gMC->VolId("TPSS");  
1906
1907   fIdLSec=gMC->VolId("TPLS"); // lower sector 
1908   fIdUSec=gMC->VolId("TPUS"); // upper sector
1909
1910   gMC->SetMaxNStep(30000); // max. number of steps increased
1911
1912   gMC->Gstpar(idtmed[2],"LOSS",5); // specific energy loss
1913
1914   printf("%s: *** TPC version 2 initialized ***\n",ClassName());
1915   printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
1916
1917   //
1918   
1919 }
1920
1921 //_____________________________________________________________________________
1922 void AliTPCv2::StepManager()
1923 {
1924   //
1925   // Called for every step in the Time Projection Chamber
1926   //
1927
1928   //
1929   // parameters used for the energy loss calculations
1930   //
1931   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1932   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1933   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation 
1934  
1935  
1936   const Float_t kbig = 1.e10;
1937
1938   Int_t id,copy;
1939   Float_t hits[4];
1940   Int_t vol[2];  
1941   TLorentzVector p;
1942   
1943   vol[1]=0; // preset row number to 0
1944
1945   //
1946
1947   gMC->SetMaxStep(kbig);
1948   
1949   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1950   
1951   Float_t charge = gMC->TrackCharge();
1952   
1953   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1954   
1955   // check the sensitive volume
1956
1957   id = gMC->CurrentVolID(copy); // current volume Id
1958
1959   if(id == fIdLSec){
1960     vol[0] = copy-1; // lower sector number
1961   }
1962   else if(id == fIdUSec){
1963     vol[0] = copy+fTPCParam->GetNInnerSector()-1; // upper sector number
1964   }
1965   else if(id == fIdSens && gMC->IsTrackEntering()){
1966  
1967     // track is entering the sensitive strip
1968     
1969     vol[1]= copy-1; // row number (absolute)
1970    
1971     // sector type
1972  
1973     id = gMC->CurrentVolOffID(1,copy);
1974
1975     if(id == fIdLSec){
1976
1977       // lower sector
1978      
1979       vol[0] = copy-1; // sector number
1980
1981     }
1982     else {
1983    
1984       // upper sector
1985
1986       vol[0] = copy-1+fTPCParam->GetNInnerSector(); // sector number
1987       vol[1] -= fTPCParam->GetNRowLow(); // row number (starts also from 0)  
1988
1989     } 
1990
1991     if(vol[1] == 0){
1992   
1993       // because Jouri wants to have this
1994
1995       gMC->TrackMomentum(p);
1996       hits[0]=p[0];
1997       hits[1]=p[1];
1998       hits[2]=p[2];
1999       hits[3]=0.; // this hit has no energy loss
2000       // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
2001
2002       AddHit(gAlice->CurrentTrack(), vol,hits);  //MI change
2003
2004     }
2005
2006      gMC->TrackPosition(p);
2007      hits[0]=p[0];
2008      hits[1]=p[1];
2009      hits[2]=p[2];
2010      hits[3]=0.; // this hit has no energy loss
2011      // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
2012
2013      AddHit(gAlice->CurrentTrack(), vol,hits);  //MI change    
2014
2015   }
2016   else return;
2017     
2018   //-----------------------------------------------------------------
2019   //  charged particle is in the sensitive volume
2020   //-----------------------------------------------------------------
2021   
2022   if(gMC->TrackStep() > 0) {
2023     
2024     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
2025     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
2026     
2027     gMC->TrackPosition(p);
2028     hits[0]=p[0];
2029     hits[1]=p[1];
2030     hits[2]=p[2];
2031     hits[3]=(Float_t)nel;
2032     
2033     // Add this hit
2034     
2035     // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
2036     if (fHitType&&2){
2037       gMC->TrackMomentum(p);
2038       Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
2039       Float_t precision =   (momentum>0.1) ? 0.002 :0.01;
2040       fTrackHits->SetHitPrecision(precision);
2041     }
2042     AddHit(gAlice->CurrentTrack(), vol,hits);  //MI change 
2043     
2044   } 
2045   
2046   // Stemax calculation for the next step
2047   
2048   Float_t pp;
2049   TLorentzVector mom;
2050   gMC->TrackMomentum(mom);
2051   Float_t ptot=mom.Rho();
2052   Float_t betaGamma = ptot/gMC->TrackMass();
2053   
2054   Int_t pid=gMC->TrackPid();
2055   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
2056     { 
2057       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
2058     }
2059   else
2060     {
2061
2062       betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
2063       pp=kprim*BetheBloch(betaGamma); 
2064    
2065       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
2066     }
2067   
2068   Float_t random[1];
2069   gMC->Rndm(random,1); // good, old GRNDM from Geant3
2070   
2071   Double_t rnd = (Double_t)random[0];
2072   
2073   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
2074   
2075 }
2076
2077 //_____________________________________________________________________________
2078 Float_t AliTPCv2::BetheBloch(Float_t bg)
2079 {
2080   //
2081   // Bethe-Bloch energy loss formula
2082   //
2083   const Double_t kp1=0.76176e-1;
2084   const Double_t kp2=10.632;
2085   const Double_t kp3=0.13279e-4;
2086   const Double_t kp4=1.8631;
2087   const Double_t kp5=1.9479;
2088
2089   Double_t dbg = (Double_t) bg;
2090
2091   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
2092
2093   Double_t aa = TMath::Power(beta,kp4);
2094   Double_t bb = TMath::Power(1./dbg,kp5);
2095
2096   bb=TMath::Log(kp3+bb);
2097   
2098   return ((Float_t)((kp2-aa-bb)*kp1/aa));
2099 }
2100
2101