Pile-up simulation (C.Cheshkov)
[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  *                                                                        *
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8  * documentation strictly for non-commercial purposes is hereby granted   *
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10  * copies and that both the copyright notice and this permission notice   *
11  * appear in the supporting documentation. The authors make no claims     *
12  * about the suitability of this software for any purpose. It is          *
13  * provided "as is" without express or implied warranty.                  *
14  **************************************************************************/
15
16 /* $Id$ */
17
18 //
19 ///////////////////////////////////////////////////////////////////////////////
20 //                                                                           //
21 //  Time Projection Chamber version 2 -- detailed TPC and slow simulation    //
22 //                                                                           //
23 //Begin_Html
24 /*
25 <img src="picts/AliTPCv2Class.gif">
26 */
27 //End_Html
28 //                                                                           //
29 //                                                                           //
30 ///////////////////////////////////////////////////////////////////////////////
31
32 #include <stdlib.h>
33
34 #include <TLorentzVector.h>
35 #include <TMath.h>
36 #include <TVirtualMC.h>
37 #include <TPDGCode.h>
38
39 #include "AliConst.h"
40 #include "AliRun.h"
41 #include "AliTPCDigitsArray.h"
42 #include "AliTPCParam.h"
43 #include "AliTPCParamSR.h"
44 #include "AliTPCTrackHitsV2.h"
45 #include "AliTPCv2.h"
46 #include "AliMC.h"
47
48 ClassImp(AliTPCv2)
49  
50 //_____________________________________________________________________________
51 AliTPCv2::AliTPCv2(const char *name, const char *title) :
52   AliTPC(name, title) 
53 {
54   //
55   // Standard constructor for Time Projection Chamber version 2
56   //
57   fIdSens=0;
58   fIdLSec=0;
59   fIdUSec=0;
60
61   SetBufferSize(128000);
62
63   SetGasMixt(2,20,10,-1,0.9,0.1,0.); // Ne-CO2 90-10
64
65   // Default sectors
66
67   SetSecAL(4);
68   SetSecAU(4);
69   SetSecLows(1,  2,  3, 19, 20, 21);
70   SetSecUps(37, 38, 39, 37+18, 38+18, 39+18, -1, -1, -1, -1, -1, -1);
71   SetSens(1); // sensitive strips set 
72
73   if (fTPCParam)
74      fTPCParam->Write(fTPCParam->GetTitle());
75 }
76  
77 //_____________________________________________________________________________
78 void AliTPCv2::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   Int_t *idtmed = fIdtmed->GetArray();
96
97   Float_t dm[50];
98   Int_t idrotm[120];
99
100   Int_t nRotMat = 0;
101
102   Int_t i,ifl1=0;
103
104   // number of sectors
105
106   Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
107   Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
108   
109   // --------------------------------------------------- 
110   //        sector specification check 
111   // ---------------------------------------------------
112   if (fSecAL >= 0) {
113     ifl1 = 0;
114     
115     for (i = 0; i < 6; ++i) {
116       if (fSecLows[i] >= 0 && fSecLows[i] < 2*nInnerSector) {
117        ifl1 = 1;
118        printf("%s: *** SECTOR %d selected\n",ClassName(),fSecLows[i]);
119       }
120     }
121
122   } else {
123     printf("%s: *** ALL LOWER SECTORS SELECTED ***\n",ClassName());
124     ifl1 = 1;
125   }
126
127   if (ifl1 == 0) {
128     printf("%s: *** ERROR: AT LEAST ONE LOWER SECTOR MUST BE SPECIFIED ***\n",ClassName());
129     printf("%s: !!! PROGRAM STOPPED !!!\n",ClassName());
130     exit(1);
131   }
132
133   if (fSecAU >= 0) {
134     
135     for (i = 0; i < 12; ++i) {
136       if (fSecUps[i] > 2*nInnerSector-1 && 
137           fSecUps[i] < 2*(nInnerSector+nOuterSector)) {
138         printf("%s: *** SECTOR %d selected\n",ClassName(),fSecUps[i]);
139       }
140     }
141     
142   } else {
143     printf("%s: *** ALL UPPER SECTORS SELECTED ***\n",ClassName());
144   }
145   
146  
147
148   //--------------------------------------------------------------------
149
150   //
151   //  Mother volume TPC (Air) - all volumes will be positioned in it
152   //
153
154   dm[0]=0.;
155   dm[1]=360.;
156   dm[2]=8.;
157
158   //
159
160   dm[3]=-283.7;
161   dm[4]=77.017;
162   dm[5]=278.;
163
164   //
165
166   dm[6]=-253.6;
167   dm[7]=65.6;
168   dm[8]=278.;
169
170   //
171
172   dm[9]=-73.3;
173   dm[10]=60.9;
174   dm[11]=278.;  
175
176   //
177
178   dm[12]=-73.3;
179   dm[13]=56.9;
180   dm[14]=278.;
181
182   //
183
184   dm[15]=73.3;
185   dm[16]=56.9;
186   dm[17]=278.;
187
188   //
189
190   dm[18]=73.3;
191   dm[19]=60.9;
192   dm[20]=278.;
193
194   //
195
196   dm[21]=253.6;
197   dm[22]=65.6;
198   dm[23]=278.;
199
200   //
201
202   dm[24]=283.7;
203   dm[25]=77.017;
204   dm[26]=278.;
205   
206   gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,27);
207
208   // outer part
209
210   //-------------------------------------------------------------------
211   //   Tpc Outer INsulator (CO2) - contains cont. vessel and field cage
212   //-------------------------------------------------------------------
213
214   dm[0]= 0.;
215   dm[1]= 360.;
216   dm[2]= 6.;
217
218   //
219
220   dm[3]=-253.6;
221   dm[4]=258.;
222   dm[5]=275.5;
223
224   //
225
226   dm[6]=-250.6;
227   dm[7]=258.;
228   dm[8]=275.5; 
229
230   //
231
232   dm[9]=-250.6;
233   dm[10]=258.;
234   dm[11]=278.;
235
236   //
237
238   dm[12]=253.6;
239   dm[13]=258.;
240   dm[14]=278.; 
241
242   //
243
244   dm[15]=253.6;
245   dm[16]=264.8;
246   dm[17]=278.;  
247
248   //
249
250   dm[18]=256.6;
251   dm[19]=264.8;
252   dm[20]=278.;
253
254   gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
255
256   //----------------------------------------------------------------
257   // Tpc Outer Contaiment Vessel  
258   //  mother volume - Al, daughters - composite (sandwich)
259   //----------------------------------------------------------------
260
261   dm[0]=0.;
262   dm[1]=360.;
263   dm[2]=6.;
264
265   //
266
267   dm[3]=-250.6;
268   dm[4]=270.4;
269   dm[5]=278.;
270
271   //
272
273   dm[6]=-247.6;
274   dm[7]=270.4;
275   dm[8]=278.; 
276
277   //
278
279   dm[9]=-247.6;
280   dm[10]=274.8124;
281   dm[11]=278.;
282
283   //
284
285   dm[12]=253.6;
286   dm[13]=274.8124;
287   dm[14]=278.;
288
289   //
290
291   dm[15]=253.6;
292   dm[16]=264.8;
293   dm[17]=278.;
294
295   //
296
297   dm[18]=256.6;
298   dm[19]=264.8;
299   dm[20]=278.;
300
301   gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,21);
302
303   // Daughter volumes - sandwich
304
305   // Tpc SAndwich 1 - Al
306
307   dm[0]=274.8124;
308   dm[1]=278.;
309   dm[2]=252.1;
310
311   gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
312
313   // Tpc SAndwich 2 - epoxy glue (I use Lexan)
314
315   dm[0] += 5.e-3;
316   dm[1] -= 5.e-3;
317
318   gMC->Gsvolu("TSA2","TUBE",idtmed[14],dm,3);
319
320   // Tpc SAndwich 3 - Tedlar
321
322   dm[0] += 0.01;
323   dm[1] -= 0.01;
324   
325   gMC->Gsvolu("TSA3","TUBE",idtmed[9],dm,3);
326
327
328   // Tpc SAndwich 4 - fiber glass (G10)
329
330   dm[0] += 3.8e-3;
331   dm[1] -= 3.8e-3;
332
333   gMC->Gsvolu("TSA4","TUBE",idtmed[12],dm,3);  
334
335   // Tpc SAndwich 5 - NOMEX honeycomb
336
337   dm[0] += 0.075;
338   dm[1] -= 0.075;   
339   
340   gMC->Gsvolu("TSA5","TUBE",idtmed[6],dm,3);
341
342   // 5->4->3->2->1->TCOV
343
344
345   gMC->Gspos("TSA5",1,"TSA4",0.,0.,0.,0,"ONLY");
346   gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
347   gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
348   gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");  
349
350   gMC->Gspos("TSA1",1,"TOCV",0.,0.,3.,0,"ONLY");
351
352   // TCOV-> TOIN
353
354   gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
355
356   //-------------------------------------------------------
357   //  Tpc Outer Field Cage
358   //  mother volume - Al, daughters - composite (sandwich)
359   //-------------------------------------------------------
360
361   dm[0]=0.;
362   dm[1]=360.;
363   dm[2]=6.;
364
365   //
366
367   dm[3]=-253.6;
368   dm[4]=258.;
369   dm[5]=275.5;
370
371   //
372
373   dm[6]=-250.6;
374   dm[7]=258.;
375   dm[8]=275.5;
376
377   //
378
379   dm[9]=-250.6;
380   dm[10]=258.;
381   dm[11]=260.0476;
382
383   //
384
385   dm[12]=250.6;
386   dm[13]=258.;
387   dm[14]=260.0476;
388
389   //
390
391   dm[15]=250.6;
392   dm[16]=258.;
393   dm[17]=269.6;
394
395   //
396
397   dm[18]=253.6;
398   dm[19]=258.;
399   dm[20]=269.6;
400
401   gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
402
403   // Daughter volumes 
404
405   // Tpc SAndwich 6 - Tedlar
406
407   dm[0]= 258.;
408   dm[1]= 260.0476;
409   dm[2]= 252.1;
410
411   gMC->Gsvolu("TSA6","TUBE",idtmed[9],dm,3);
412
413   // Tpc SAndwich 7 - fiber glass
414
415   dm[0] += 3.8e-3;
416   dm[1] -= 3.8e-3;
417
418   gMC->Gsvolu("TSA7","TUBE",idtmed[12],dm,3);
419
420
421   // Tpc SAndwich 8 - NOMEX
422
423   dm[0] += 0.02;
424   dm[1] -= 0.02;
425
426   gMC->Gsvolu("TSA8","TUBE",idtmed[6],dm,3);    
427
428   // 8->7->6->TOFC
429
430   gMC->Gspos("TSA8",1,"TSA7",0.,0.,0.,0,"ONLY");
431   gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY"); 
432   gMC->Gspos("TSA6",1,"TOFC",0.,0.,0.,0,"ONLY");
433
434   // TOFC->TOIN 
435   // TOFC overlaps with 
436
437   gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
438
439   // TOIN->TPC
440
441   gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
442
443   // inner part
444
445   //--------------------------------------------------------------------
446   // Tpc Inner INsulator (CO2) - inner f.c. will be placed there
447   // Inner containment vessel will be placed directly in the TPC
448   //-------------------------------------------------------------------- 
449
450   dm[0]=0.;
451   dm[1]=360.;
452   dm[2]=4.;
453
454   // 
455
456   dm[3]=-253.6;
457   dm[4]=65.9;
458   dm[5]=79.2;
459
460   //
461
462   dm[6]=-73.3;
463   dm[7]=61.2;
464   dm[8]=79.2;  
465
466   //
467
468   dm[9]=73.3;
469   dm[10]=61.2;
470   dm[11]=79.2;
471
472   //
473
474   dm[12]=253.6;
475   dm[13]=65.9;
476   dm[14]=79.2;
477
478   gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,15);
479
480   // the middle part of the F.C. is thinner - carve out the strip - Ne-CO2
481
482   dm[0]=79.16;
483   dm[1]=79.2;
484   dm[2]=88.;
485
486   gMC->Gsvolu("TII1","TUBE",idtmed[1],dm,3);
487
488   gMC->Gspos("TII1",1,"TIIN",0.,0.,0.,0,"ONLY");
489
490   //-----------------------------------------------------
491   // Tpc Inner Field Cage
492   // mother volume - Al, daughters - composite (sandwich)
493   //------------------------------------------------------
494
495   dm[0]=0.;
496   dm[1]=360.;
497   dm[2]=10.;
498
499   //
500
501   dm[3]=-253.6;
502   dm[4]=70.3;
503   dm[5]=79.2;
504
505   //
506
507   dm[6]=-250.6;
508   dm[7]=70.3;
509   dm[8]=79.2;
510
511   //
512
513   dm[9]=-250.6;
514   dm[10]=77.0524;
515   dm[11]=79.2;
516
517   //
518
519   dm[12]=-88.;
520   dm[13]=77.0524;
521   dm[14]=79.2;
522
523   //
524
525   dm[15]=-88.;
526   dm[16]=77.0924;
527   dm[17]=79.16;
528
529   //
530
531   dm[18]=88.;
532   dm[19]=77.0924;
533   dm[20]=79.16;
534
535   //
536
537   dm[21]=88.;
538   dm[22]=77.0524;
539   dm[23]=79.2;
540
541   //
542
543   dm[24]=250.6;
544   dm[25]=77.0524;
545   dm[26]=79.2;
546
547   //
548
549   dm[27]=250.6;
550   dm[28]=70.3;
551   dm[29]=79.2;
552
553   //
554
555   dm[30]=253.6;
556   dm[31]=70.3;
557   dm[32]=79.2;
558
559   gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,33);
560
561   // daughter volumes - central part
562
563   // Tpc Sandwich 9 -Tedlar
564
565   dm[0]=77.0924;
566   dm[1]=79.16;
567   dm[2]=88.;
568
569   gMC->Gsvolu("TSA9","TUBE",idtmed[9],dm,3); 
570
571   // Tpc Sandwich 10 - fiber glass (G10) 
572
573   dm[0] += 3.8e-3;
574   dm[1] -= 3.8e-3;
575
576   gMC->Gsvolu("TS10","TUBE",idtmed[12],dm,3);
577
578   // Tpc Sandwich 11 - NOMEX
579
580   dm[0] += 0.03;
581   dm[1] -= 0.03; 
582
583   gMC->Gsvolu("TS11","TUBE",idtmed[6],dm,3);
584
585   // 11->10->9->TIFC
586
587   gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
588   gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
589
590   gMC->Gspos("TSA9",1,"TIFC",0.,0.,0.,0,"ONLY");
591
592   // daughter volumes - outer parts (reinforced)
593
594   // Tpc Sandwich 12 -Tedlar
595
596   dm[0]=77.0524;
597   dm[1]=79.2;
598   dm[2]=82.05;
599
600   gMC->Gsvolu("TS12","TUBE",idtmed[9],dm,3);
601
602   // Tpc Sandwich 13 - fiber glass (G10) 
603
604   dm[0] += 3.8e-3;
605   dm[1] -= 3.8e-3;
606
607   gMC->Gsvolu("TS13","TUBE",idtmed[12],dm,3);
608
609   // Tpc Sandwich 14 - NOMEX
610
611   dm[0] += 0.07;
612   dm[1] -= 0.07;  
613
614   gMC->Gsvolu("TS14","TUBE",idtmed[6],dm,3);
615
616   // 14->13->12->TIFC
617
618   gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
619   gMC->Gspos("TS13",1,"TS12",0.,0.,0.,0,"ONLY"); 
620
621   gMC->Gspos("TS12",1,"TIFC",0.,0.,170.05,0,"ONLY");
622   gMC->Gspos("TS12",2,"TIFC",0.,0.,-170.05,0,"ONLY"); 
623
624   // place this inside the inner insulator
625
626   gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
627
628   // and now in the TPC...
629
630   gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
631
632   //---------------------------------------------------------
633   // Tpc Inner Containment vessel - Cones
634   //---------------------------------------------------------
635
636   dm[0]=0.;
637   dm[1]=360.;
638   dm[2]=8.;
639
640   //
641
642   dm[3]=71.8;
643   dm[4]=56.9;
644   dm[5]=59.4;
645
646   //
647
648   dm[6]=73.;
649   dm[7]=56.9;
650   dm[8]=59.4;
651
652   //
653
654   dm[9]=73.;
655   dm[10]=56.9;
656   dm[11]=61.2;
657
658   //
659
660   dm[12]=73.3;
661   dm[13]=56.9;
662   dm[14]=61.2;
663
664   //
665    
666   dm[15]=73.3;
667   dm[16]=60.9;
668   dm[17]=61.2;
669
670   // 
671
672   dm[18]=253.6;
673   dm[19]=65.6;
674   dm[20]=65.9; 
675
676   //
677
678   dm[21]=253.6;
679   dm[22]=65.6;
680   dm[23]=74.6;
681
682   //
683
684   dm[24]=256.6;
685   dm[25]=65.6;
686   dm[26]=74.6;
687
688   gMC->Gsvolu("TICC","PCON",idtmed[4],dm,27);
689
690   Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
691
692   // reflection matrix
693   
694   theta1 = 90.;
695   phi1   = 0.;
696   theta2 = 90.;
697   phi2   = 270.;
698   theta3 = 180.;
699   phi3   = 0.;
700
701   AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
702
703   gMC->Gspos("TICC",1,"TPC ",0.,0.,0.,0,"ONLY");
704   gMC->Gspos("TICC",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
705
706
707   //---------------------------------------------------------
708   // Tpc Inner Containment vessel - Middle part -Al
709   //---------------------------------------------------------
710
711   dm[0]=0.;
712   dm[1]=360.;
713   dm[2]=6.;
714
715   //
716
717   dm[3]=-71.6;
718   dm[4]=60.2;
719   dm[5]=61.2;
720
721   //
722
723   dm[6]=-69.1;
724   dm[7]=60.2;
725   dm[8]=61.2;
726
727   //
728
729   dm[9]=-69.1;
730   dm[10]=60.6224;
731   dm[11]=61.2;  
732
733   //
734
735   dm[12]=69.1;
736   dm[13]=60.6224;
737   dm[14]=61.2;
738
739   //
740
741   dm[15]=69.1;
742   dm[16]=60.2;
743   dm[17]=61.2;
744
745   //
746
747   dm[18]=71.6;
748   dm[19]=60.2;
749   dm[20]=61.2;
750
751   gMC->Gsvolu("TICM","PCON",idtmed[4],dm,21);
752
753   // Tpc Sandwich 15 - Al
754
755   dm[0]=60.6224;
756   dm[1]=61.2;
757   dm[2]=70.1;
758
759   gMC->Gsvolu("TS15","TUBE",idtmed[4],dm,3);
760
761   // Tpc Sandwich 16 -  epoxy glue
762
763   dm[0] += 5.e-3;
764   dm[1] -= 5.e-3;
765
766   gMC->Gsvolu("TS16","TUBE",idtmed[14],dm,3);
767
768   // Tpc Sandwich 17 - Tedlar
769
770   dm[0] += 0.01;
771   dm[1] -= 0.01;
772
773   gMC->Gsvolu("TS17","TUBE",idtmed[9],dm,3);
774
775   // Tpc Sandwich 18 - carbon fiber
776
777   dm[0] += 3.8e-3;
778   dm[1] -= 3.8e-3;
779
780   gMC->Gsvolu("TS18","TUBE",idtmed[15],dm,3);  
781
782   // Tpc Sandwich 19 - Nomex
783
784   dm[0] += 0.02;
785   dm[1] -= 0.02;
786
787   gMC->Gsvolu("TS19","TUBE",idtmed[6],dm,3); 
788
789   // 19->18->17->16->15-> TICM
790
791   gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY"); 
792   gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
793   gMC->Gspos("TS17",1,"TS16",0.,0.,0.,0,"ONLY");
794   gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
795
796   gMC->Gspos("TS15",1,"TICM ",0.,0.,0.,0,"ONLY");
797  
798
799   // TPc inner cont. vessel Joints
800
801   dm[0]=60.2;
802   dm[1]=61.2;
803   dm[2]=0.5;
804
805   gMC->Gsvolu("TPJ1","TUBE",idtmed[4],dm,3);
806
807   gMC->Gspos("TPJ1",1,"TPC ",0.,0.,72.3,0,"ONLY");
808   gMC->Gspos("TPJ1",2,"TPC ",0.,0.,-72.3,0,"ONLY");
809
810   //
811
812   dm[0]=0.;
813   dm[1]=360.;
814   dm[2]=4.;
815
816   //
817
818   dm[3]=70.8;
819   dm[4]=58.4;
820   dm[5]=60.1;
821
822   //
823
824   dm[6]=71.2;
825   dm[7]=58.4;
826   dm[8]=60.1;
827
828   //
829
830   dm[9]=71.2;
831   dm[10]=58.4;
832   dm[11]=59.4;
833
834   //
835
836   dm[12]=71.6;
837   dm[13]=58.4;
838   dm[14]=59.4;
839
840   gMC->Gsvolu("TPJ2","PCON",idtmed[4],dm,15);
841
842   gMC->Gspos("TPJ2",1,"TPC ",0.,0.,0.,0,"ONLY");
843   gMC->Gspos("TPJ2",2,"TPC ",0.,0.,0.,idrotm[nRotMat],"ONLY");
844
845
846
847   // Tpc Inner Containment vessel Seal (Viton, I use Lexan for a time being)
848
849   dm[0]=58.4;
850   dm[1]=61.2;
851   dm[2]=0.1;
852
853   gMC->Gsvolu("TICS","TUBE",idtmed[14],dm,3);
854
855   gMC->Gspos("TICS",1,"TPC ",0.,0.,71.7,0,"ONLY");
856   gMC->Gspos("TICS",2,"TPC ",0.,0.,-71.7,0,"ONLY"); 
857
858   // TICM -> TPC
859
860   gMC->Gspos("TICM",1,"TPC ",0.,0.,0.,0,"ONLY");
861
862   //
863
864   nRotMat++; // prepare for the next rotation matrix 
865
866   //---------------------------------------------------------
867   //  Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
868   //  and its daughters (HV membrane, rods, readout chambers)
869   //---------------------------------------------------------
870
871   dm[0]= 79.2;
872   dm[1]= 258.0;
873   dm[2]= 253.6;
874
875   gMC->Gsvolu("TDGN","TUBE",idtmed[1],dm,3); 
876
877   // sector opening angles
878
879   Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
880   Float_t outerOpenAngle = fTPCParam->GetOuterAngle();
881
882   // sector angle shift
883
884   Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
885
886
887   // All above parameters are identical for inner and outer
888   // sectors. The distinction is kept for the historical reasons
889   // and eventually will disappear.
890
891   Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
892   Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
893   Float_t space;
894
895   //-------------------------------------------------------------------------
896   //   Tpc Inner Readout Chambers 
897   //-------------------------------------------------------------------------
898
899   dm[0]= 14.483;
900   dm[1]= 23.3345; 
901   dm[2]= 1.6; // thickness
902   dm[3]= 25.1;
903
904   gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
905
906   // this volume will be positioned in the empty space
907   // of the end-cap to avoid overlaps
908
909   dm[0]= 13.7305;
910   dm[1]= 21.1895;
911   dm[2]= 2.25;
912   dm[3]= 21.15;
913
914   gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
915
916
917   //------------------------------------------------
918   // Tpc Inner readout chamber Pad Plane
919   //------------------------------------------------
920
921   dm[0]= 14.483;
922   dm[1]= 23.3345;
923   dm[2]= 0.5;
924   dm[3]= 25.1;
925
926   gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
927
928   // 
929
930   dm[0] -= 1.218511934;
931   dm[1] -= 1.218511934;
932   dm[2] = 0.35;
933
934   gMC->Gsvolu("TIC3","TRD1",idtmed[1],dm,4);
935
936   gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
937
938   gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
939
940
941   //----------------------------------------------
942   // Tpc Readout Chambers Empty spaces - for both
943   // inner and outer sectors
944   //----------------------------------------------
945
946   gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
947
948   // Inner sector - 4 spaces
949
950
951   dm[3] = 4.7625;
952   dm[0] = 12.472;
953
954   Float_t rr = 90.52;
955   Float_t zz;
956
957   zz= -12.7875;
958   
959   space = rr*tanAlpha-dm[0];
960
961   for(Int_t nsLow=0;nsLow<4;nsLow++){
962
963     rr += 9.525;
964     dm[1]= rr*tanAlpha - space;  
965
966     dm[2]=0.8;
967
968     gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
969
970     //
971
972     dm[2] = 1.2;
973
974     gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
975
976     rr += 0.4;
977     dm[0] = rr*tanAlpha - space;
978     zz += (0.4+9.525); 
979
980   }
981
982   dm[0]= 12.472;
983   // dm[1] - this is the dm[1] from the previous TRCE
984   dm[2]= 1.05;
985   dm[3]= 19.65;
986
987   gMC->Gsposp("TRCE",9,"TIC1",0.,-1.2,0.,0,"ONLY",dm,4);   
988
989   //
990   // TPc Space for Connectors
991   //
992
993   dm[0]= .3;
994   dm[1]= .3;
995   dm[2]= 4.5;
996
997   gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
998
999   // TPC Connectors
1000
1001   dm[0]= .25;
1002   dm[1]= .15;
1003   dm[2]= 3.75;
1004
1005   gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3); 
1006
1007   gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1008
1009   zz = -12.7875;
1010
1011
1012   Float_t alpha;
1013   Float_t astep;
1014
1015   // inner part of the inner sector - 2 x 20 holes
1016   
1017   astep = 20.00096874/19.;
1018
1019   alpha = 10.00048437-astep;
1020
1021   Float_t x1,x2;
1022
1023     x1 = 13.31175725;
1024     x1 -= 0.996357832; 
1025
1026     x2 = 15.06180253;
1027     x2 -= 1.163028812;
1028
1029   Int_t ncon;
1030
1031   for(ncon=0;ncon<20;ncon++){
1032
1033     phi1 = 0.;
1034     theta1 = 90.+alpha;
1035     phi2=90.;
1036     theta2 = 90.;
1037     phi3 = (alpha>0) ? 0. : 180.;
1038     theta3 = TMath::Abs(alpha);
1039
1040     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1041
1042  
1043
1044     gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1045     gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1046
1047
1048     x1 -= 1.296357833;
1049     x2 -= 1.463028812;
1050
1051     alpha -= astep;   
1052     nRotMat++; 
1053
1054   }
1055
1056   // outer part of the inner sector - 2 x 25 holes
1057
1058    astep = 20.00096874/24.; 
1059    alpha = 10.00048437-astep;
1060
1061    x1 = 16.81184781;
1062    x1 -= 1.016295986;
1063
1064    x2 = 18.5618931;
1065    x2 -= 1.150914854;
1066
1067   for(ncon=0;ncon<25;ncon++){
1068
1069     phi1 = 0.;
1070     theta1 = 90.+alpha;
1071     phi2=90.;
1072     theta2 = 90.;
1073     phi3 = (alpha>0) ? 0. : 180.;
1074     theta3 = TMath::Abs(alpha);
1075
1076     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1077
1078  
1079
1080     gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1081     gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1082
1083
1084     x1 -= 1.316295986;
1085     x2 -= 1.450914854;
1086
1087     alpha -= astep;   
1088     nRotMat++; 
1089
1090   }  
1091
1092   //--------------------------------------------------------------------------
1093   //  TPC Outer Readout Chambers
1094   //  this is NOT a final design
1095   //--------------------------------------------------------------------------
1096
1097   dm[0]= 23.3875;
1098   dm[1]= 43.524;
1099   dm[2]= 1.5; //thickness
1100   dm[3]= 57.1;
1101
1102   gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1103
1104   //------------------------------------------------
1105   // Tpc Outer readout chamber Pad Plane
1106   //------------------------------------------------
1107
1108   dm[2]= 0.5;
1109
1110   gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1111
1112   dm[0] -= 1.218511934;
1113   dm[1] -= 1.218511934;
1114   dm[2] = 0.35;
1115
1116   gMC->Gsvolu("TOC3","TRD1",idtmed[1],dm,4);
1117
1118   gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1119
1120   gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1121
1122   // empty space
1123
1124   dm[0]= 21.035;
1125   dm[1]= 38.7205;
1126   dm[2]= 0.7; 
1127   dm[3]= 50.15;
1128
1129   gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);  
1130
1131   dm[0]= 22.2935;
1132   dm[1]= 40.5085;
1133   dm[2]= 2.25;
1134   dm[3]= 51.65;
1135
1136   gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1137
1138   dm[0]= 21.35;
1139   dm[1]= 38.7205;
1140   dm[2]= 2.25;
1141   dm[3]= 50.15;
1142
1143   gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1144
1145   //-----------------------------------------------
1146   // Tpc Services Support Wheel
1147   //-----------------------------------------------
1148
1149   dm[0]=0.;
1150   dm[1]=360.;
1151   dm[2]=18.;
1152   dm[3]=2.;
1153
1154   dm[4]= -5.;
1155   dm[5]= 77.017;
1156   dm[6]= 255.267;
1157
1158   dm[7]= 5.;
1159   dm[8]= dm[5];
1160   dm[9]= dm[6];
1161
1162   gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1163
1164   // Tpc Services Wheel Cover
1165
1166   dm[4]= -0.5;
1167   dm[7]= 0.5;
1168
1169   gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1170
1171   // Tpc Service wheel Cover Empty space
1172    
1173   dm[0]= 10.99;
1174   dm[1]= 39.599;
1175   dm[2]= .5;
1176   dm[3]= 81.125;
1177
1178   gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1179
1180   // Tpc services Wheel Empty Spaces
1181
1182   dm[0]= 13.18017507;
1183   dm[1]= 44.61045938;
1184   dm[2]= 4.;
1185   dm[3]= 89.125;
1186
1187   gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1188
1189   // Tpc Services Wheel Bars
1190
1191   gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1192
1193   // bars-> TWES
1194
1195   dm[2]= 4.;
1196   dm[3]= .4;
1197
1198   dm[0]= 13.8149522;
1199   dm[1]= 13.95601379;
1200   
1201   gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1202
1203   dm[0]= 43.83462067; 
1204   dm[1]= 43.97568225;
1205
1206   gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1207
1208   // TPc ELectronics - right now 30% X0 Si
1209
1210   dm[0]= 14.03813696;
1211   dm[1]= 43.3524075;
1212   dm[2]= 1.404;
1213   dm[3]= 83.125;
1214
1215   gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1216   gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1217
1218   //--------------------------------------------------------------------------
1219   //  End caps
1220   //--------------------------------------------------------------------------
1221
1222   // TPc Main Wheel - Al
1223
1224   dm[0]= 74.9;
1225   dm[1]= 264.4;
1226   dm[2]= 3.0;
1227
1228   gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1229
1230   //--------------------------------------------------------------------------
1231   //  Tpc Empty Space for the Readout chambers
1232   //--------------------------------------------------------------------------  
1233
1234   Float_t rLow= 86.2;
1235   Float_t rUp= 243.5;
1236   Float_t dR = 0.5*(rUp-rLow);
1237
1238   space= 1.5/cosAlpha; // wheel ribs are 3.0 cm wide
1239
1240   dm[0]= rLow*tanAlpha-space;
1241   dm[1]= rUp*tanAlpha-space;
1242   dm[2] = 3.0;
1243   dm[3]= dR;
1244
1245   gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1246
1247   // TIC1->TESR
1248
1249   gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1250
1251   // TOC1->TESR
1252
1253   gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1254
1255   // Tpc Empty Space Bars - Al (daughters of TESR)
1256
1257   Float_t zBar;
1258
1259   gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1260
1261   // lower bar
1262
1263   dm[0]= rLow*tanAlpha-space;
1264   dm[1]= 88.7*tanAlpha-space;
1265   dm[2]= 2.25;
1266   dm[3]= 1.275;
1267
1268   zBar = -dR+dm[3];
1269
1270   gMC->Gsposp("TESB",1,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1271
1272   // middle bar
1273
1274   dm[0]= 131.65*tanAlpha-space;
1275   dm[1]= 136.5*tanAlpha-space;
1276   dm[3]= 2.425;
1277
1278   zBar = -dR +131.65+dm[3]-rLow;
1279
1280   gMC->Gsposp("TESB",2,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);  
1281
1282   // upper bar
1283
1284   dm[0]= 240.4*tanAlpha-space;
1285   dm[1]= rUp*tanAlpha-space;
1286   dm[3]= 1.55;
1287
1288   zBar = dR-dm[3];
1289
1290   gMC->Gsposp("TESB",3,"TESR",0.,0.75,zBar,0,"ONLY",dm,4);
1291
1292   //------------------------------------------------------
1293   //  TPc Lower "S" Sectors 
1294   //------------------------------------------------------
1295
1296
1297   Float_t inSecLowEdge = fTPCParam->GetInnerRadiusLow();
1298   Float_t inSecUpEdge =  fTPCParam->GetInnerRadiusUp();
1299
1300   dm[0] = inSecLowEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1301   dm[1] = inSecUpEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1302   dm[2] = 0.5*(250. - 5.e-3);
1303   dm[3] = 0.5*(inSecUpEdge-inSecLowEdge);  
1304
1305   gMC->Gsvolu("TPLS", "TRD1", idtmed[2], dm, 4); // sensitive 
1306
1307
1308   //----------------------------------------------------------
1309   //  TPc Upper Sectors
1310   //----------------------------------------------------------
1311
1312   Float_t ouSecLowEdge = fTPCParam->GetOuterRadiusLow();
1313   Float_t ouSecUpEdge = fTPCParam->GetOuterRadiusUp();
1314
1315   dm[0] = ouSecLowEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;  
1316   dm[1] = ouSecUpEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;  
1317   dm[2] = 0.5*(250. - 5.e-3);
1318   dm[3] = 0.5*(ouSecUpEdge-ouSecLowEdge);
1319
1320   gMC->Gsvolu("TPUS", "TRD1", idtmed[2], dm, 4); // sensitive
1321
1322
1323
1324   // sensitive strips
1325
1326     gMC->Gsvolu("TPSS","TRD1",idtmed[2],dm,0); // sensitive
1327
1328     Int_t nofStrips,nstr;
1329     Float_t r1,r2,zs;
1330     Float_t stripThick = 0.01; // 100 microns
1331     Float_t deadSpace;
1332
1333     // inner sector
1334
1335
1336     // if all lower sectors selected define only 1 strip
1337
1338     nofStrips=((fSecAL <0)||(fSecAL>=0 && fSens<0)) ? 1 : fTPCParam->GetNRowLow(); 
1339     deadSpace = fTPCParam->GetInnerWireMount();
1340
1341     dm[2] = 0.5*(250. - 5.e-3);
1342     dm[3] = 0.5 * stripThick;
1343
1344     for(nstr=0;nstr<nofStrips;nstr++){
1345
1346       r1 = fTPCParam->GetPadRowRadiiLow(nstr);
1347       r2 = r1 + stripThick;     
1348       dm[0] = r1 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1349       dm[1] = r2 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1350       zs = -inSecLowEdge -0.5*(inSecUpEdge-inSecLowEdge);
1351       zs += r1;
1352       zs += dm[3];
1353     
1354       gMC->Gsposp("TPSS", nstr+1, "TPLS", 0., 0., zs, 0, "ONLY", dm, 4);
1355
1356
1357     }
1358
1359     // strips only if several upper sectors selected end fSens > 0
1360
1361     if(fSecAU >=0 && fSens >0){
1362
1363     Int_t nsSave = nofStrips;
1364
1365     // outer sector
1366
1367     nofStrips = fTPCParam->GetNRowUp();
1368     deadSpace = fTPCParam->GetOuterWireMount();
1369
1370     dm[2] = 0.5*(250. - 5.e-3);
1371     dm[3] = 0.5 * stripThick;
1372
1373   
1374     for(nstr=0;nstr<nofStrips;nstr++){
1375     
1376       r1 = fTPCParam->GetPadRowRadiiUp(nstr); 
1377       r2 = r1 + stripThick;
1378       dm[0] = r1 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1379       dm[1] = r2 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1380       zs = -ouSecLowEdge -0.5*(ouSecUpEdge-ouSecLowEdge);
1381       zs += r1;
1382       zs += dm[3];
1383
1384       gMC->Gsposp("TPSS", nstr+1+nsSave, "TPUS", 0., 0., zs, 0, "ONLY", dm, 4);
1385
1386      }    
1387     }    
1388
1389
1390   //-------------------------------------------------------
1391   //  positioning of the empty spaces into the main wheel
1392   //  and readout chambers and sectors into the drift gas
1393   //-------------------------------------------------------
1394
1395   Float_t rCenter,xc,yc;
1396   Float_t rInner,rOuter; // center of the inner and outer chamber
1397
1398   rCenter = rLow+dR;
1399
1400   rInner = 108.07;
1401   rOuter = 190.68;
1402
1403
1404   for(Int_t ns=0; ns<nInnerSector;ns++){
1405
1406     phi1 = ns * innerOpenAngle + innerAngleShift;
1407     phi1 *= kRaddeg; // in degrees
1408
1409     phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1410
1411     if (phi1 > 360.) phi1 -= 360.;
1412
1413     theta1 = 90.;
1414     phi2   = 90.;
1415     theta2 = 180.;
1416     phi3   = ns * innerOpenAngle + innerAngleShift;
1417     phi3 *= kRaddeg; // in degrees
1418
1419     phi3 = (Float_t)TMath::Nint(phi3);
1420       
1421     if(phi3 > 360.) phi3 -= 360.;
1422
1423     theta3 = 90.;
1424
1425     // "holes"->End plate
1426
1427     xc = rCenter*TMath::Cos(phi3*kDegrad);
1428     yc = rCenter*TMath::Sin(phi3*kDegrad);
1429
1430     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1431
1432     gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1433
1434     // TSCE->TSWC (services wheel volumes)
1435
1436     xc = 166.142*TMath::Cos(phi3*kDegrad);
1437     yc = 166.142*TMath::Sin(phi3*kDegrad);
1438
1439     gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1440     gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1441
1442
1443     // readout chambers->TDGN (drift gas)
1444
1445     xc = rInner*TMath::Cos(phi3*kDegrad);
1446     yc = rInner*TMath::Sin(phi3*kDegrad);
1447
1448     gMC->Gspos("TIRC",ns+1,"TDGN",xc,yc,252.,idrotm[nRotMat],"ONLY");
1449
1450     // here lower sectors 
1451
1452     if(fSecAL <0){
1453
1454       // all lower sectors are positioned
1455
1456       gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1457       gMC->
1458         Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1459     }
1460     else{
1461
1462       // only selected sectors are positioned (up to 6 sectors)
1463
1464       for(Int_t sel=0;sel<6;sel++){
1465
1466         if(fSecLows[sel] == ns){
1467           gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1468         }
1469         else if(fSecLows[sel] == ns+nInnerSector){
1470          gMC->
1471          Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1472         }
1473       }
1474     } // lower sectors finished
1475
1476     
1477     xc = rOuter*TMath::Cos(phi3*kDegrad);
1478     yc = rOuter*TMath::Sin(phi3*kDegrad);
1479
1480     gMC->Gspos("TORC",ns+1,"TDGN",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1481
1482     // here upper sectors 
1483
1484     if(fSecAU <0){
1485
1486       // all upper sectors
1487
1488       gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1489       gMC->
1490         Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY");
1491     }
1492     else{
1493
1494       // only selected sectors (up to 12)
1495
1496       for(Int_t sel=0;sel<12;sel++){
1497         if(fSecUps[sel] == ns+2*nInnerSector){
1498           gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.0025,idrotm[nRotMat],"ONLY");
1499         }         
1500         else if(fSecUps[sel] == ns+2*nInnerSector+nOuterSector){
1501          gMC->
1502           Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.0025,idrotm[nRotMat],"ONLY"); 
1503         }
1504       }
1505     } // upper sectors finished
1506
1507
1508     nRotMat++;
1509
1510     theta2 = 0.; // reflection
1511
1512     AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1513
1514     xc = rInner*TMath::Cos(phi3*kDegrad);
1515     yc = rInner*TMath::Sin(phi3*kDegrad);
1516
1517     gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGN",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1518
1519     xc = rOuter*TMath::Cos(phi3*kDegrad);
1520     yc = rOuter*TMath::Sin(phi3*kDegrad);
1521
1522     gMC->Gspos("TORC",ns+nOuterSector+1,"TDGN",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1523
1524     nRotMat++;
1525
1526   } 
1527   // TPMW->TPC
1528
1529   gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1530   gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[0],"ONLY");
1531
1532   //---------------------------------------------------------
1533   //  Tpc High Voltage Membrane - 100 microns of mylar
1534   //---------------------------------------------------------
1535
1536   dm[0]=82.8;
1537   dm[1]=252.;
1538   dm[2]=0.005;
1539
1540   gMC->Gsvolu("THVM","TUBE",idtmed[8],dm,3);
1541
1542   gMC->Gspos("THVM",1,"TDGN",0.,0.,0.,0,"ONLY");
1543
1544   // Tpc High Voltage membrane Holders
1545
1546   gMC->Gsvolu("THVH","TUBE",idtmed[4],dm,0);
1547
1548   
1549
1550   // inner
1551
1552   dm[0]=79.3;
1553   dm[1]=82.8;
1554   dm[2]=0.2;
1555
1556   gMC->Gsposp("THVH",1,"TDGN",0.,0.,0.,0,"ONLY",dm,3);
1557   
1558   // outer
1559
1560   dm[0]= 252.;
1561   dm[1]= 257.9;
1562   dm[2]= 0.4;
1563
1564   gMC->Gsposp("THVH",2,"TDGN",0.,0.,0.,0,"ONLY",dm,3);
1565
1566   //----------------------------------------------------------
1567   // TPc Support Rods - MAKROLON
1568   //----------------------------------------------------------
1569
1570   dm[0]= 0.9;
1571   dm[1]= 1.2;
1572
1573   gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,0); // inner and outer rods differ
1574
1575
1576   for(Int_t nrod=0;nrod<18;nrod++){
1577     Float_t angle=innerOpenAngle*(Float_t)nrod;
1578
1579     xc=81.5*TMath::Cos(angle);
1580     yc=81.5*TMath::Sin(angle); 
1581
1582     dm[2]=126.7;
1583
1584     gMC->Gsposp("TPSR",nrod+1,"TDGN",xc,yc,126.9,0,"ONLY",dm,3); 
1585     gMC->Gsposp("TPSR",nrod+19,"TDGN",xc,yc,-126.9,0,"ONLY",dm,3);
1586
1587     dm[2]=126.6;
1588
1589     xc=254.25*TMath::Cos(angle);
1590     yc=254.25*TMath::Sin(angle);   
1591       
1592     // rod number 54 contans the HV cable
1593
1594     if(nrod<17) {
1595       gMC->Gsposp("TPSR",nrod+37,"TDGN",xc,yc,127.,0,"ONLY",dm,3);
1596       gMC->Gsposp("TPSR",nrod+54,"TDGN",xc,yc,-127.,0,"ONLY",dm,3);
1597     }
1598     
1599   }
1600
1601   //----------------------------------------------------------
1602   // Tpc High Voltage Rod - MAKROLON + Copper cable
1603   //----------------------------------------------------------
1604
1605   // rod with cable (Left)
1606
1607   dm[0]=0.;
1608   dm[1]=2.25;
1609   dm[2]=126.6;
1610
1611   gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1612
1613   // HV cable
1614  
1615   dm[0]=0.;
1616   dm[1]=0.3;
1617   dm[2]=126.6;
1618
1619   gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);  
1620
1621   // empty space
1622
1623   dm[0]=0.3;
1624   dm[1]=1.;
1625   dm[2]=126.6;
1626
1627   gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1628
1629   gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1630   gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1631
1632   // rod without cable
1633
1634   dm[0]=1.8;
1635   dm[1]=2.25;
1636   dm[2]=126.6;
1637
1638   gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1639
1640   gMC->Gspos("THVL",1,"TDGN",xc,yc,-127.,0,"ONLY");  
1641   gMC->Gspos("THVR",1,"TDGN",xc,yc,127.,0,"ONLY");
1642
1643   gMC->Gspos("TDGN",1,"TPC ",0.,0.,0.,0,"ONLY"); 
1644  
1645   // services wheel cover -> wheel
1646
1647
1648   gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1649   gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1650
1651
1652   // put the wheel into the TPC
1653
1654   gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1655   gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1656
1657   //
1658
1659   gMC->Gsord("TPMW",6);
1660   gMC->Gsord("TSSW",6);
1661   gMC->Gsord("TSWC",6);
1662   if(fSecAL >=0)  gMC->Gsord("TPLS",3);
1663   if(fSecAU >=0 && fSens >0)  gMC->Gsord("TPUS",3);
1664   gMC->Gsord("TDGN",6);
1665
1666   // put the TPC into ALIC (main mother volume)
1667
1668   gMC->Gspos("TPC ",1,"ALIC",0.,0.,0.,0,"ONLY");
1669
1670  
1671
1672 } // end of function
1673  
1674 //_____________________________________________________________________________
1675 void AliTPCv2::DrawDetector()
1676 {
1677   //
1678   // Draw a shaded view of the Time Projection Chamber version 1
1679   //
1680
1681   // Set everything unseen
1682   gMC->Gsatt("*", "seen", -1);
1683   // 
1684   // Set ALIC mother transparent
1685   gMC->Gsatt("ALIC","SEEN",0);
1686   //
1687   // Set the volumes visible
1688   //
1689
1690   gMC->Gsatt("TPC ","SEEN",0);
1691   gMC->Gsatt("TOIN","SEEN",1);
1692   gMC->Gsatt("TOIN","COLO",7);
1693   gMC->Gsatt("TOCV","SEEN",1);
1694   gMC->Gsatt("TOCV","COLO",4);
1695   gMC->Gsatt("TSA1","SEEN",0);
1696   gMC->Gsatt("TSA2","SEEN",0);
1697   gMC->Gsatt("TSA3","SEEN",0);
1698   gMC->Gsatt("TSA4","SEEN",0);  
1699   gMC->Gsatt("TSA5","SEEN",0);
1700   gMC->Gsatt("TOFC","SEEN",1);
1701   gMC->Gsatt("TOFC","COLO",4);
1702   gMC->Gsatt("TSA6","SEEN",0);
1703   gMC->Gsatt("TSA7","SEEN",0);
1704   gMC->Gsatt("TSA8","SEEN",0);    
1705   gMC->Gsatt("TIIN","SEEN",1);
1706   gMC->Gsatt("TIIN","COLO",7);
1707   gMC->Gsatt("TII1","SEEN",0);
1708   gMC->Gsatt("TIFC","SEEN",1);
1709   gMC->Gsatt("TIFC","COLO",4);
1710   gMC->Gsatt("TSA9","SEEN",0); 
1711   gMC->Gsatt("TS10","SEEN",0);
1712   gMC->Gsatt("TS11","SEEN",0);
1713   gMC->Gsatt("TS12","SEEN",0);
1714   gMC->Gsatt("TS13","SEEN",0);
1715   gMC->Gsatt("TS14","SEEN",0);
1716   gMC->Gsatt("TICC","SEEN",0);
1717   gMC->Gsatt("TICM","SEEN",0);
1718   gMC->Gsatt("TS15","SEEN",0);
1719   gMC->Gsatt("TS16","SEEN",0);
1720   gMC->Gsatt("TS17","SEEN",0);
1721   gMC->Gsatt("TS18","SEEN",0);  
1722   gMC->Gsatt("TS19","SEEN",0); 
1723   gMC->Gsatt("TPJ1","SEEN",0);
1724   gMC->Gsatt("TPJ2","SEEN",0);
1725   gMC->Gsatt("TICS","SEEN",0);
1726   gMC->Gsatt("TDGN","SEEN",0); 
1727   gMC->Gsatt("TIRC","SEEN",0);
1728   gMC->Gsatt("TIC1","SEEN",1);
1729   gMC->Gsatt("TIPP","SEEN",0);
1730   gMC->Gsatt("TIC3","SEEN",0);
1731   gMC->Gsatt("TRCE","SEEN",0);
1732   gMC->Gsatt("TPSC","SEEN",0);
1733   gMC->Gsatt("TPCC","SEEN",0); 
1734   gMC->Gsatt("TORC","SEEN",0);
1735   gMC->Gsatt("TOPP","SEEN",0);
1736   gMC->Gsatt("TOC3","SEEN",0);
1737   gMC->Gsatt("TOC1","SEEN",1);
1738   gMC->Gsatt("TSSW","SEEN",1);
1739   gMC->Gsatt("TSWC","SEEN",1);
1740   gMC->Gsatt("TSSW","COLO",3);
1741   gMC->Gsatt("TSWC","COLO",3);
1742   gMC->Gsatt("TSCE","COLO",6);
1743   gMC->Gsatt("TSCE","SEEN",1);
1744   gMC->Gsatt("TWES","SEEN",0);
1745   gMC->Gsatt("TSWB","SEEN",0);
1746   gMC->Gsatt("TPEL","SEEN",0);
1747   gMC->Gsatt("TPMW","SEEN",1);
1748   gMC->Gsatt("TESR","SEEN",1);
1749   gMC->Gsatt("TPMW","COLO",12);
1750   gMC->Gsatt("TIC1","COLO",5);
1751   gMC->Gsatt("TOC1","COLO",5);
1752   gMC->Gsatt("TESB","SEEN",0);
1753   gMC->Gsatt("THVM","SEEN",1);
1754   gMC->Gsatt("THVM","COLO",11);
1755   gMC->Gsatt("THVH","SEEN",0);
1756   gMC->Gsatt("TPSR","SEEN",0); 
1757   gMC->Gsatt("THVL","SEEN",0);
1758   gMC->Gsatt("THVC","SEEN",0);  
1759   gMC->Gsatt("THVE","SEEN",0);
1760   gMC->Gsatt("THVR","SEEN",0);
1761   gMC->Gsatt("TPSS","SEEN",0);
1762   gMC->Gsatt("TPUS","SEEN",0);
1763   gMC->Gsatt("TPLS","SEEN",0);
1764
1765   //
1766   gMC->Gdopt("hide", "on");
1767   gMC->Gdopt("shad", "on");
1768   gMC->Gsatt("*", "fill", 7);
1769   gMC->SetClipBox(".");
1770   gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1771   gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1772   gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1773   gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1774   gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1775   gMC->DefaultRange();
1776   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1777   gMC->Gdhead(1111, "Time Projection Chamber");
1778   gMC->Gdman(18, 4, "MAN");
1779   gMC->Gdopt("hide","off");
1780 }
1781
1782 //_____________________________________________________________________________
1783 void AliTPCv2::CreateMaterials()
1784 {
1785   //
1786   // Define materials for version 2 of the Time Projection Chamber
1787   //
1788  
1789   AliTPC::CreateMaterials();
1790 }
1791
1792 //_____________________________________________________________________________
1793 void AliTPCv2::Init()
1794 {
1795   //
1796   // Initialises version 2 of the TPC after that it has been built
1797   //
1798
1799   Int_t *idtmed = fIdtmed->GetArray();
1800   
1801   AliTPC::Init();
1802
1803
1804   
1805   fIdSens=gMC->VolId("TPSS");  
1806
1807   fIdLSec=gMC->VolId("TPLS"); // lower sector 
1808   fIdUSec=gMC->VolId("TPUS"); // upper sector
1809
1810   gMC->SetMaxNStep(30000); // max. number of steps increased
1811
1812   gMC->Gstpar(idtmed[2],"LOSS",5); // specific energy loss
1813
1814   printf("%s: *** TPC version 2 initialized ***\n",ClassName());
1815   printf("%s: Maximum number of steps = %d\n",ClassName(),gMC->GetMaxNStep());
1816
1817   //
1818   
1819 }
1820
1821 //_____________________________________________________________________________
1822 void AliTPCv2::StepManager()
1823 {
1824   //
1825   // Called for every step in the Time Projection Chamber
1826   //
1827
1828   //
1829   // parameters used for the energy loss calculations
1830   //
1831   const Float_t kprim = 14.35; // number of primary collisions per 1 cm
1832   const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
1833   const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation 
1834  
1835  
1836   const Float_t kbig = 1.e10;
1837
1838   Int_t id,copy;
1839   Float_t hits[5];
1840   Int_t vol[2];  
1841   TLorentzVector p;
1842   
1843   vol[1]=0; // preset row number to 0
1844
1845   //
1846
1847   gMC->SetMaxStep(kbig);
1848   
1849   if(!gMC->IsTrackAlive()) return; // particle has disappeared
1850   
1851   Float_t charge = gMC->TrackCharge();
1852   
1853   if(TMath::Abs(charge)<=0.) return; // take only charged particles
1854   
1855   // check the sensitive volume
1856
1857   id = gMC->CurrentVolID(copy); // current volume Id
1858
1859   if ( (gMC->IsTrackEntering() || gMC->IsTrackExiting()) &&
1860        ((id == fIdLSec) || (id == fIdUSec)) ) {
1861
1862     AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
1863   }
1864
1865   if(id == fIdLSec){
1866     vol[0] = copy-1; // lower sector number
1867   }
1868   else if(id == fIdUSec){
1869     vol[0] = copy+fTPCParam->GetNInnerSector()-1; // upper sector number
1870   }
1871   else if(id == fIdSens && gMC->IsTrackEntering()){
1872  
1873     // track is entering the sensitive strip
1874     
1875     vol[1]= copy-1; // row number (absolute)
1876    
1877     // sector type
1878  
1879     id = gMC->CurrentVolOffID(1,copy);
1880
1881     if(id == fIdLSec){
1882
1883       // lower sector
1884      
1885       vol[0] = copy-1; // sector number
1886
1887     }
1888     else {
1889    
1890       // upper sector
1891
1892       vol[0] = copy-1+fTPCParam->GetNInnerSector(); // sector number
1893       vol[1] -= fTPCParam->GetNRowLow(); // row number (starts also from 0)  
1894
1895     } 
1896
1897     if(vol[1] == 0){
1898   
1899       // because Jouri wants to have this
1900
1901       gMC->TrackMomentum(p);
1902       hits[0]=p[0];
1903       hits[1]=p[1];
1904       hits[2]=p[2];
1905       hits[3]=0.; // this hit has no energy loss
1906       // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->GetCurrentTrackNumber(),vol,hits);
1907
1908       // Get also the track time for pileup simulation
1909       hits[4]=gMC->TrackTime();
1910
1911       AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  //MI change
1912
1913     }
1914
1915      gMC->TrackPosition(p);
1916      hits[0]=p[0];
1917      hits[1]=p[1];
1918      hits[2]=p[2];
1919      hits[3]=0.; // this hit has no energy loss
1920      // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->GetCurrentTrackNumber(),vol,hits);
1921
1922      // Get also the track time for pileup simulation
1923      hits[4]=gMC->TrackTime();
1924
1925      AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  //MI change    
1926
1927   }
1928   else return;
1929     
1930   //-----------------------------------------------------------------
1931   //  charged particle is in the sensitive volume
1932   //-----------------------------------------------------------------
1933   
1934   if(gMC->TrackStep() > 0) {
1935     
1936     Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
1937     nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
1938     
1939     gMC->TrackPosition(p);
1940     hits[0]=p[0];
1941     hits[1]=p[1];
1942     hits[2]=p[2];
1943     hits[3]=(Float_t)nel;
1944     
1945     // Add this hit
1946     
1947     // new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->GetCurrentTrackNumber(),vol,hits);
1948     if (fHitType&&2){
1949       gMC->TrackMomentum(p);
1950       Float_t momentum = TMath::Sqrt(p[0]*p[0]+p[1]*p[1]);
1951       Float_t precision =   (momentum>0.1) ? 0.002 :0.01;
1952       fTrackHits->SetHitPrecision(precision);
1953     }
1954
1955     // Get also the track time for pileup simulation
1956     hits[4]=gMC->TrackTime();
1957
1958     AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);  //MI change 
1959     
1960   } 
1961   
1962   // Stemax calculation for the next step
1963   
1964   Float_t pp;
1965   TLorentzVector mom;
1966   gMC->TrackMomentum(mom);
1967   Float_t ptot=mom.Rho();
1968   Float_t betaGamma = ptot/gMC->TrackMass();
1969   
1970   Int_t pid=gMC->TrackPid();
1971   if((pid==kElectron || pid==kPositron) && ptot > 0.002)
1972     { 
1973       pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
1974     }
1975   else
1976     {
1977
1978       betaGamma = TMath::Max(betaGamma,(Float_t)7.e-3); // protection against too small bg
1979       pp=kprim*BetheBloch(betaGamma); 
1980    
1981       if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
1982     }
1983   
1984   Double_t rnd = gMC->GetRandom()->Rndm();
1985   
1986   gMC->SetMaxStep(-TMath::Log(rnd)/pp);
1987   
1988 }
1989
1990 //_____________________________________________________________________________
1991 Float_t AliTPCv2::BetheBloch(Float_t bg)
1992 {
1993   //
1994   // Bethe-Bloch energy loss formula
1995   //
1996   const Double_t kp1=0.76176e-1;
1997   const Double_t kp2=10.632;
1998   const Double_t kp3=0.13279e-4;
1999   const Double_t kp4=1.8631;
2000   const Double_t kp5=1.9479;
2001
2002   Double_t dbg = (Double_t) bg;
2003
2004   Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
2005
2006   Double_t aa = TMath::Power(beta,kp4);
2007   Double_t bb = TMath::Power(1./dbg,kp5);
2008
2009   bb=TMath::Log(kp3+bb);
2010   
2011   return ((Float_t)((kp2-aa-bb)*kp1/aa));
2012 }
2013
2014