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Corrections of the hit recording algorithm.
[u/mrichter/AliRoot.git] / TPC / AliTPCv2.cxx
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4c039060 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$Log$
d4c354b9 18Revision 1.25 2000/10/02 21:28:18 fca
19Removal of useless dependecies via forward declarations
20
94de3818 21Revision 1.24 2000/08/28 10:02:30 kowal2
22Corrected bug in the StepManager
23
930ee558 24Revision 1.23 2000/07/10 20:57:39 hristov
25Update of TPC code and macros by M.Kowalski
26
37831078 27Revision 1.22 2000/06/30 12:07:50 kowal2
28Updated from the TPC-PreRelease branch
29
73042f01 30Revision 1.21.2.4 2000/06/26 07:39:42 kowal2
31Changes to obey the coding rules
32
33Revision 1.21.2.3 2000/06/25 08:38:41 kowal2
34Splitted from AliTPCtracking
35
36Revision 1.21.2.2 2000/06/16 12:58:13 kowal2
37Changed parameter settings
38
39Revision 1.21.2.1 2000/06/09 07:15:07 kowal2
40
41Defaults loaded automatically (hard-wired)
42Optional parameters can be set via macro called in the constructor
43
44Revision 1.21 2000/05/15 10:00:30 kowal2
45Corrected bug in the TPC geometry, thanks to Ivana Hrivnacova
46
e94dd9ca 47Revision 1.20 2000/04/17 09:37:33 kowal2
48removed obsolete AliTPCDigitsDisplay.C
49
cc80f89e 50Revision 1.19.8.2 2000/04/10 08:31:52 kowal2
51
52Different geometry for different sectors
53Updated readout chambers
54Some modifications to StepManager by J.Belikov
55
56Revision 1.19.8.1 2000/04/10 07:56:53 kowal2
57Not used anymore - removed
58
59Revision 1.19 1999/11/04 17:28:07 fca
60Correct barrel part of HV Degrader
61
a5371c42 62Revision 1.18 1999/10/14 16:52:08 fca
63Only use PDG codes and not GEANT ones
64
69e40cce 65Revision 1.17 1999/10/08 06:27:23 fca
66Corrected bug in the HV degrader geometry, thanks to G.Tabary
67
d183a600 68Revision 1.16 1999/10/04 13:39:54 fca
69Correct array index problem
70
cdde5b1e 71Revision 1.15 1999/09/29 09:24:34 fca
72Introduction of the Copyright and cvs Log
73
4c039060 74*/
75
73042f01 76//
fe4da5cc 77///////////////////////////////////////////////////////////////////////////////
78// //
79// Time Projection Chamber version 2 -- detailed TPC and slow simulation //
80// //
81//Begin_Html
82/*
1439f98e 83<img src="picts/AliTPCv2Class.gif">
fe4da5cc 84*/
85//End_Html
86// //
87// //
88///////////////////////////////////////////////////////////////////////////////
2a49965d 89#include <stdlib.h>
fe4da5cc 90
91#include <TMath.h>
bcac8ae4 92
fe4da5cc 93#include "AliTPCv2.h"
cc80f89e 94#include "AliTPCDigitsArray.h"
fe4da5cc 95#include "AliRun.h"
94de3818 96#include "AliMC.h"
fe4da5cc 97#include "AliConst.h"
69e40cce 98#include "AliPDG.h"
73042f01 99#include "AliTPCParam.h"
100#include "AliTPCParamSR.h"
8c555625 101
fe4da5cc 102ClassImp(AliTPCv2)
103
104//_____________________________________________________________________________
105AliTPCv2::AliTPCv2(const char *name, const char *title) :
106 AliTPC(name, title)
107{
108 //
109 // Standard constructor for Time Projection Chamber version 2
110 //
37831078 111 fIdSens=0;
112 fIdLSec=0;
113 fIdUSec=0;
114
fe4da5cc 115 SetBufferSize(128000);
73042f01 116
117 SetGasMixt(2,20,10,-1,0.9,0.1,0.); // Ne-CO2 90-10
118
119 // Default sectors
120
121 SetSecAL(4);
122 SetSecAU(4);
123 SetSecLows(1, 2, 3, 19, 20, 21);
124 SetSecUps(37, 38, 39, 37+18, 38+18, 39+18, -1, -1, -1, -1, -1, -1);
37831078 125 SetSens(1); // sensitive strips set
73042f01 126
127 if (fTPCParam)
128 fTPCParam->Write(fTPCParam->GetTitle());
fe4da5cc 129}
130
131//_____________________________________________________________________________
132void AliTPCv2::CreateGeometry()
133{
134 //
135 // Create the geometry of Time Projection Chamber version 2
136 //
137 //Begin_Html
138 /*
37831078 139 <img src="picts/AliTPC.gif">
fe4da5cc 140 */
141 //End_Html
142 //Begin_Html
143 /*
1439f98e 144 <img src="picts/AliTPCv2Tree.gif">
fe4da5cc 145 */
146 //End_Html
147
8c555625 148
1283eee5 149 Int_t *idtmed = fIdtmed->GetArray();
150
37831078 151 Float_t dm[50];
62a73ee5 152 Int_t idrotm[120];
1283eee5 153
154 Int_t nRotMat = 0;
155
d4c354b9 156 Int_t i,ifl1=0;
1283eee5 157
37831078 158 // number of sectors
159
1283eee5 160 Int_t nInnerSector = fTPCParam->GetNInnerSector()/2;
161 Int_t nOuterSector = fTPCParam->GetNOuterSector()/2;
fe4da5cc 162
163 // ---------------------------------------------------
164 // sector specification check
165 // ---------------------------------------------------
166 if (fSecAL >= 0) {
167 ifl1 = 0;
168
169 for (i = 0; i < 6; ++i) {
1283eee5 170 if (fSecLows[i] >= 0 && fSecLows[i] < 2*nInnerSector) {
fe4da5cc 171 ifl1 = 1;
172 printf("*** SECTOR %d selected\n",fSecLows[i]);
173 }
174 }
175
176 } else {
177 printf("*** ALL LOWER SECTORS SELECTED ***\n");
8c555625 178 ifl1 = 1;
fe4da5cc 179 }
180
d4c354b9 181 if (ifl1 == 0) {
182 printf("*** ERROR: AT LEAST ONE LOWER SECTOR MUST BE SPECIFIED ***\n");
183 printf("!!! PROGRAM STOPPED !!!\n");
184 exit(1);
185 }
186
fe4da5cc 187 if (fSecAU >= 0) {
fe4da5cc 188
189 for (i = 0; i < 12; ++i) {
1283eee5 190 if (fSecUps[i] > 2*nInnerSector-1 &&
191 fSecUps[i] < 2*(nInnerSector+nOuterSector)) {
fe4da5cc 192 printf("*** SECTOR %d selected\n",fSecUps[i]);
193 }
194 }
195
196 } else {
197 printf("*** ALL UPPER SECTORS SELECTED ***\n");
198 }
199
d4c354b9 200
37831078 201
202 //--------------------------------------------------------------------
203
204 //
205 // Mother volume (Air) - all volumes will be positioned in it
206 //
1283eee5 207
37831078 208 dm[0]=0.;
209 dm[1]=360.;
210 dm[2]=12.;
1283eee5 211
37831078 212 //
213
214 dm[3]= -283.7;
215 dm[4]= 66.2;
216 dm[5]= 277.95;
1283eee5 217
37831078 218 //
1283eee5 219
37831078 220 dm[6]= -255.6;
221 dm[7]= 66.2;
222 dm[8]= 277.95;
1283eee5 223
37831078 224 //
1283eee5 225
37831078 226 dm[9]= -73.3;
227 dm[10]= 59.0;
228 dm[11]= 277.95;
1283eee5 229
37831078 230 //
1283eee5 231
37831078 232 dm[12]= -73.3;
233 dm[13]= 56.9;
234 dm[14]= 277.95;
1283eee5 235
37831078 236 //
1283eee5 237
37831078 238 dm[15]= -72.1;
239 dm[16]= 56.9;
240 dm[17]= 277.95;
1283eee5 241
37831078 242 //
1283eee5 243
37831078 244 dm[18]= -72.1;
245 dm[19]= 60.65;
246 dm[20]= 277.95;
1283eee5 247
37831078 248 //
1283eee5 249
37831078 250 dm[21]= 72.1;
251 dm[22]= 60.65;
252 dm[23]= 277.95;
1283eee5 253
37831078 254 //
1283eee5 255
37831078 256 dm[24]= 72.1;
257 dm[25]= 56.9;
258 dm[26]= 277.95;
1283eee5 259
37831078 260 //
1283eee5 261
37831078 262 dm[27]= 73.3;
263 dm[28]= 56.9;
264 dm[29]= 277.95;
1283eee5 265
37831078 266 //
1283eee5 267
37831078 268 dm[30]= 73.3;
269 dm[31]= 60.65;
270 dm[32]= 277.95;
1283eee5 271
37831078 272 //
1283eee5 273
37831078 274 dm[33]= 250.4;
275 dm[34]= 66.0;
276 dm[35]= 277.95;
1283eee5 277
37831078 278 //
1283eee5 279
37831078 280 dm[36]= 283.7;
281 dm[37]= 66.0;
282 dm[38]= 277.95;
1283eee5 283
1283eee5 284
37831078 285 gMC->Gsvolu("TPC ","PCON",idtmed[0],dm,39);
1283eee5 286
1283eee5 287
37831078 288 //-------------------------------------------------------------------
289 // Tpc Outer INsulator (CO2)
290 //-------------------------------------------------------------------
1283eee5 291
37831078 292 dm[0]= 0.;
293 dm[1]= 360.;
294 dm[2]= 6.;
1283eee5 295
37831078 296 //
297
298 dm[3]= -253.6;
299 dm[4]= 258.;
300 dm[5]= 266.65;
1283eee5 301
37831078 302 //
1283eee5 303
37831078 304 dm[6]= -253.;
305 dm[7]= 258.;
306 dm[8]= 266.65;
1283eee5 307
37831078 308 dm[9]= -253.;
309 dm[10]= 258.;
310 dm[11]= 277.97;
1283eee5 311
37831078 312 dm[12]= 253.6;
313 dm[13]= 258.;
314 dm[14]= 277.97;
1283eee5 315
37831078 316 //
1283eee5 317
37831078 318 dm[15]= 253.6;
319 dm[16]= 265.2;
320 dm[17]= 277.95;
1283eee5 321
37831078 322 //
cc80f89e 323
37831078 324 dm[18]= 255.6;
325 dm[19]= 265.2;
326 dm[20]= 277.95;
1283eee5 327
1283eee5 328
37831078 329 gMC->Gsvolu("TOIN","PCON",idtmed[3],dm,21);
1283eee5 330
37831078 331 //---------------------------------------------------------------
332 // shreds (G10) - TPC Rings
333 //---------------------------------------------------------------
1283eee5 334
37831078 335 gMC->Gsvolu("TPCR","TUBE",idtmed[12],dm,0);
1283eee5 336
37831078 337 dm[0]= 258.;
338 dm[1]= 266.65;
339 dm[2]= 0.3;
1283eee5 340
37831078 341 gMC->Gsposp("TPCR",1,"TOIN",0.,0.,-253.3,0,"ONLY",dm,3); // left bottom
1283eee5 342
37831078 343 //
1283eee5 344
37831078 345 dm[0]= 258.;
346 dm[1]= 270.9;
347 dm[2]= 0.3;
1283eee5 348
37831078 349 gMC->Gsposp("TPCR",2,"TOIN",0.,0.,253.3,0,"ONLY",dm,3); // right
1283eee5 350
37831078 351 //
1283eee5 352
37831078 353 dm[0]= 272.2;
354 dm[1]= 277.95;
355 dm[2]= 0.3;
1283eee5 356
37831078 357 gMC->Gsposp("TPCR",3,"TOIN",0.,0.,-250.7,0,"ONLY",dm,3); // left top
1283eee5 358
37831078 359 //----------------------------------------------------------------
360 // Tpc Outer Contaiment Vessel
361 // mother volume - Al, daughters - composite (sandwich)
362 //----------------------------------------------------------------
363
364 dm[0]= 0.;
365 dm[1]= 360.;
366 dm[2]=5.;
1283eee5 367
37831078 368 //
cc80f89e 369
37831078 370 dm[3]= -250.4;
371 dm[4]= 272.2;
372 dm[5]= 277.95;
1283eee5 373
37831078 374 //
1283eee5 375
37831078 376 dm[6]= -248.4;
377 dm[7]= 272.2;
378 dm[8]= 277.95;
1283eee5 379
37831078 380 //
1283eee5 381
37831078 382 dm[9]= 253.6;
383 dm[10]= 272.2;
384 dm[11]= 277.95;
1283eee5 385
37831078 386 //
1283eee5 387
37831078 388 dm[12]= 253.6;
389 dm[13]= 265.2;
390 dm[14]= 277.95;
1283eee5 391
37831078 392 //
1283eee5 393
37831078 394 dm[15]= 255.6;
395 dm[16]= 265.2;
396 dm[17]= 277.95;
1283eee5 397
37831078 398 gMC->Gsvolu("TOCV","PCON",idtmed[4],dm,18);
1283eee5 399
37831078 400 // Daughter volumes
1283eee5 401
37831078 402 // Tpc SAndwich 1 - Al
403
404 dm[0]= 274.81;
405 dm[1]= 277.95;
406 dm[2]= 251.7;
1283eee5 407
37831078 408 gMC->Gsvolu("TSA1","TUBE",idtmed[4],dm,3);
1283eee5 409
37831078 410 // Tpc SAndwich 2 - Tedlar
1283eee5 411
37831078 412 dm[0] += 5.e-3;
413 dm[1] -= 5.e-3;
414
415 gMC->Gsvolu("TSA2","TUBE",idtmed[9],dm,3);
1283eee5 416
37831078 417 // Tpc SAndwich 3 - Kevlar
8c555625 418
37831078 419 dm[0] += 5e-3;
420 dm[1] -= 5.e-3;
8c555625 421
37831078 422 gMC->Gsvolu("TSA3","TUBE",idtmed[5],dm,3);
8c555625 423
37831078 424 // Tpc SAndwich 4 - NOMEX honeycomb
1283eee5 425
37831078 426 dm[0] += 0.06;
427 dm[1] -= 0.06;
1283eee5 428
37831078 429 gMC->Gsvolu("TSA4","TUBE",idtmed[5],dm,3);
430
431 // 4->3->2->1->TOCV
8c555625 432
37831078 433 gMC->Gspos("TSA4",1,"TSA3",0.,0.,0.,0,"ONLY");
434 gMC->Gspos("TSA3",1,"TSA2",0.,0.,0.,0,"ONLY");
435 gMC->Gspos("TSA2",1,"TSA1",0.,0.,0.,0,"ONLY");
fe4da5cc 436
37831078 437 gMC->Gspos("TSA1",1,"TOCV",0.,0.,2.6,0,"ONLY");
fe4da5cc 438
37831078 439 // TCOV-> TOIN
fe4da5cc 440
37831078 441 gMC->Gspos("TOCV",1,"TOIN",0.,0.,0.,0,"ONLY");
fe4da5cc 442
37831078 443 //-------------------------------------------------------
444 // Tpc Outer Field Cage
445 // mother volume - Al, daughters - composite (sandwich)
446 //-------------------------------------------------------
1283eee5 447
37831078 448 dm[0]=0.;
449 dm[1]=360.;
450 dm[2]=6.;
1283eee5 451
37831078 452 dm[3]= -253.;
453 dm[4]= 258.;
454 dm[5]= 277.95;
1283eee5 455
37831078 456 //
1283eee5 457
37831078 458 dm[6]= -251.;
459 dm[7]= 258.;
460 dm[8]= 277.95;
1283eee5 461
37831078 462 //
463
464 dm[9]= -251.;
465 dm[10]= 258.;
466 dm[11]= 260.05;
1283eee5 467
37831078 468 //
1283eee5 469
37831078 470 dm[12]= 251.;
471 dm[13]= 258.;
472 dm[14]= 260.05;
1283eee5 473
37831078 474 //
1283eee5 475
37831078 476 dm[15]= 251.;
477 dm[16]= 258.;
478 dm[17]= 260.05;
1283eee5 479
37831078 480 //
1283eee5 481
37831078 482 dm[18]= 253.;
483 dm[19]= 258.;
484 dm[20]= 270.9;
1283eee5 485
37831078 486 gMC->Gsvolu("TOFC","PCON",idtmed[4],dm,21);
1283eee5 487
37831078 488 // Daughter volumes
1283eee5 489
37831078 490 // Tpc SAndwich 5 - Al
1283eee5 491
37831078 492 dm[0]= 258.;
493 dm[1]= 260.05;
494 dm[2]= 251.7;
1283eee5 495
37831078 496 gMC->Gsvolu("TSA5","TUBE",idtmed[4],dm,3);
1283eee5 497
37831078 498 // Tpc SAndwich 6 - Tedlar
1283eee5 499
37831078 500 dm[0] += 5.e-3;
501 dm[1] -= 5.e-3;
1283eee5 502
37831078 503 gMC->Gsvolu("TSA6","TUBE",idtmed[9],dm,3);
1283eee5 504
37831078 505 // Tpc SAndwich 7 - Kevlar
1283eee5 506
37831078 507 dm[0] += 5.e-3;
508 dm[1] -= 5.e-3;
1283eee5 509
37831078 510 gMC->Gsvolu("TSA7","TUBE",idtmed[5],dm,3);
1283eee5 511
37831078 512 // Tpc SAndwich 8 - NOMEX
1283eee5 513
37831078 514 dm[0] += 0.02;
515 dm[1] -= 0.02;
1283eee5 516
37831078 517 gMC->Gsvolu("TSA8","TUBE",idtmed[6],dm,3);
1283eee5 518
37831078 519 // 8->7->6->5->TOFC
1283eee5 520
37831078 521 gMC->Gspos("TSA8",1,"TSA7",0.,0.,0.,0,"ONLY");
522 gMC->Gspos("TSA7",1,"TSA6",0.,0.,0.,0,"ONLY");
523 gMC->Gspos("TSA6",1,"TSA5",0.,0.,0.,0,"ONLY");
1283eee5 524
37831078 525 gMC->Gspos("TSA5",1,"TOFC",0.,0.,0.,0,"ONLY");
fe4da5cc 526
37831078 527 // TOFC->TOIN
fe4da5cc 528
37831078 529 gMC->Gspos("TOFC",1,"TOIN",0.,0.,0.,0,"ONLY");
1283eee5 530
37831078 531 // TOIN->TPC
1283eee5 532
37831078 533 gMC->Gspos("TOIN",1,"TPC ",0.,0.,0.,0,"ONLY");
1283eee5 534
37831078 535 //--------------------------------------------------------------------
536 // Tpc Inner INsulator (CO2)
537 //--------------------------------------------------------------------
1283eee5 538
1283eee5 539
37831078 540 dm[0]=0.;
541 dm[1]= 360.;
542 dm[2]= 15.;
1283eee5 543
37831078 544 //
1283eee5 545
37831078 546 dm[3]= -255.6;
547 dm[4]= 66.2;
548 dm[5]= 74.8;
1283eee5 549
37831078 550 //
1283eee5 551
37831078 552 Float_t tanL = (66.2-59.0)/(255.6-73.3); // tangent of the left cone part
1283eee5 553
37831078 554 dm[6]= -253.6;
555 dm[7]= 59.0+ (253.6-73.3)*tanL;
556 dm[8]= 74.8;
1283eee5 557
37831078 558 //
1283eee5 559
37831078 560 dm[9]= -253.6;
561 dm[10]= dm[7];
562 dm[11]= 79.2;
1283eee5 563
37831078 564 //
1283eee5 565
37831078 566 dm[12]= -73.3;
567 dm[13]= 59.0;
568 dm[14]= 79.2;
1283eee5 569
37831078 570 //
1283eee5 571
37831078 572 dm[15]= -73.3;
573 dm[16]= 56.9;
574 dm[17]= 79.2;
1283eee5 575
37831078 576 //
1283eee5 577
37831078 578 dm[18]= -72.1;
579 dm[19]= 59.6;
580 dm[20]= 79.2;
1283eee5 581
37831078 582 //
1283eee5 583
37831078 584 dm[21]= -72.1;
585 dm[22]= 60.65;
586 dm[23]= 79.2;
1283eee5 587
37831078 588 //
1283eee5 589
37831078 590 dm[24]= 72.1;
591 dm[25]= 60.65;
592 dm[26]= 79.2;
1283eee5 593
37831078 594 //
1283eee5 595
37831078 596 dm[27]= 72.1;
597 dm[28]= 59.6;
598 dm[29]= 79.2;
1283eee5 599
37831078 600 //
1283eee5 601
37831078 602 dm[30]= 73.3;
603 dm[31]= 56.9;
604 dm[32]= 79.2;
1283eee5 605
37831078 606 //
1283eee5 607
37831078 608 dm[33]= 73.3;
609 dm[34]= 59.0;
610 dm[35]= 79.2;
1283eee5 611
37831078 612 //
1283eee5 613
37831078 614 dm[36]= 250.4;
615 dm[37]= 66.0;
616 dm[38]= 79.2;
1283eee5 617
37831078 618 //
1283eee5 619
37831078 620 dm[39]= 253.0;
621 dm[40]= 66.0;
622 dm[41]= 79.2;
1283eee5 623
37831078 624 //
1283eee5 625
37831078 626 dm[42]= 253.0;
627 dm[43]= 75.3;
628 dm[44]= 79.2;
1283eee5 629
630 //
1283eee5 631
37831078 632 dm[45]= 253.6;
633 dm[46]= 75.3;
634 dm[47]= 79.2;
1283eee5 635
37831078 636 gMC->Gsvolu("TIIN","PCON",idtmed[3],dm,48);
1283eee5 637
1283eee5 638
37831078 639 //--------------------------------------------------------------------
640 // Tpc Inner Containment vessel, Left part
641 // mother volume - Al, daughter - composite (sandwich)
642 //--------------------------------------------------------------------
1283eee5 643
37831078 644 dm[0]= 0.;
645 dm[1]= 360.;
646 dm[2]= 8.;
647
648 //
649
650 dm[3]= -255.6;
651 dm[4]= 66.2;
652 dm[5]= 74.8;
1283eee5 653
37831078 654 //
1283eee5 655
37831078 656 Float_t cosL = 1./TMath::Sqrt(1.+tanL*tanL);
657 Float_t sandThick = 2.14; // cone composite thickness
1283eee5 658
1283eee5 659
660 //
37831078 661
662 dm[6]= -253.6;
663 dm[7]= 59.0 + (253.6-73.3)*tanL;
664 dm[8]= 74.8;
665
1283eee5 666 //
667
37831078 668 dm[9]= -253.6;
669 dm[10]= dm[7];
670 dm[11]= dm[7]+sandThick/cosL;
1283eee5 671
37831078 672 //
1283eee5 673
37831078 674 dm[12]= -75.6;
675 dm[13]= 59.0+(75.6-73.3)*tanL;
676 dm[14]= dm[13]+sandThick/cosL;
1283eee5 677
37831078 678 //
1283eee5 679
37831078 680 dm[15]= -75.6;
681 dm[16]= dm[13];
682 dm[17]= 60.65;
1283eee5 683
37831078 684 //
1283eee5 685
37831078 686 dm[18]= -73.3;
687 dm[19]= 59.0;
688 dm[20]= 60.65;
1283eee5 689
37831078 690 //
1283eee5 691
37831078 692 dm[21]= -73.3;
693 dm[22]= 56.9;
694 dm[23]= 60.65;
1283eee5 695
37831078 696 //
1283eee5 697
37831078 698 dm[24]= -72.1;
699 dm[25]= 56.9;
700 dm[26]= 60.65;
1283eee5 701
37831078 702 gMC->Gsvolu("TICL","PCON",idtmed[4],dm,27);
1283eee5 703
37831078 704 // Daughter volumes
1283eee5 705
37831078 706 // Tpc SAndwich 9 - Al
1283eee5 707
37831078 708 dm[0]= 0.;
709 dm[1]= 360.;
710 dm[2]= 2.;
1283eee5 711
37831078 712 //
1283eee5 713
37831078 714 dm[3]= - 254.3;
715 dm[4]= 59.0+(254.3-73.3)*tanL;
716 dm[5]= dm[4]+sandThick/cosL;
1283eee5 717
37831078 718 //
1283eee5 719
37831078 720 dm[6]= -78.3;
721 dm[7]= 59.0+(78.3-73.3)*tanL;
722 dm[8]= dm[7]+sandThick/cosL;
1283eee5 723
37831078 724 //
1283eee5 725
37831078 726 gMC->Gsvolu("TSA9","PCON",idtmed[4],dm,9);
1283eee5 727
37831078 728 // Tpc SAndwich 10 - Tedlar
1283eee5 729
37831078 730 dm[4]+= 5.e-3/cosL;
731 dm[5]-= 5.e-3/cosL;
1283eee5 732
37831078 733 //
1283eee5 734
37831078 735 dm[7]+= 5.e-3/cosL;
736 dm[8]+= 5.e-3/cosL;
1283eee5 737
37831078 738 gMC->Gsvolu("TS10","PCON",idtmed[9],dm,9);
1283eee5 739
37831078 740 // Tpc SAndwich 11 - Kevlar
1283eee5 741
37831078 742 dm[4]+= 5.e-3/cosL;
743 dm[5]-= 5.e-3/cosL;
1283eee5 744
37831078 745 //
1283eee5 746
37831078 747 dm[7]+= 5.e-3/cosL;
748 dm[8]+= 5.e-3/cosL;
1283eee5 749
37831078 750 gMC->Gsvolu("TS11","PCON",idtmed[5],dm,9);
1283eee5 751
37831078 752 // Tpc SAndwich 12 - NOMEX
1283eee5 753
37831078 754 dm[4]+= 0.06/cosL;
755 dm[5]-= 0.06/cosL;
1283eee5 756
37831078 757 //
1283eee5 758
37831078 759 dm[7]+= 0.06/cosL;
760 dm[8]+= 0.06/cosL;
1283eee5 761
37831078 762 gMC->Gsvolu("TS12","PCON",idtmed[6],dm,9);
1283eee5 763
37831078 764 // 12->11->10->9
1283eee5 765
37831078 766 gMC->Gspos("TS12",1,"TS11",0.,0.,0.,0,"ONLY");
767 gMC->Gspos("TS11",1,"TS10",0.,0.,0.,0,"ONLY");
768 gMC->Gspos("TS10",1,"TSA9",0.,0.,0.,0,"ONLY");
1283eee5 769
37831078 770 // TSA9->TICL
771
772 gMC->Gspos("TSA9",1,"TICL",0.,0.,0.,0,"ONLY");
1283eee5 773
37831078 774 //--------------------------------------------------------------------
775 // Tpc Inner Containment vessel, Right part
776 // mother volume - Al, daughter - composite (sandwich)
777 //--------------------------------------------------------------------
1283eee5 778
37831078 779 dm[0]= 0.;
780 dm[1]= 360.;
781 dm[2]=8.;
1283eee5 782
37831078 783 //
1283eee5 784
37831078 785 dm[3]= 72.1;
786 dm[4]= 56.9;
787 dm[5]= 60.65;
1283eee5 788
37831078 789 //
1283eee5 790
37831078 791 dm[6]= 73.3;
792 dm[7]= 56.9;
793 dm[8]= 60.65;
1283eee5 794
37831078 795 //
1283eee5 796
37831078 797 dm[9]= 73.3;
798 dm[10]= 59.0;
799 dm[11]= 60.65;
1283eee5 800
37831078 801 //
1283eee5 802
37831078 803 Float_t tanR = (66.0-59.0)/(250.5-73.3); // to avoid accuracy problems
804 Float_t cosR = 1./TMath::Sqrt(1.+tanR*tanR); //as above
1283eee5 805
37831078 806 //
1283eee5 807
37831078 808 dm[12]= 75.6;
809 dm[13]= 59.0+(75.6-73.3)*tanR;
810 dm[14]= 60.65;
1283eee5 811
37831078 812 //
1283eee5 813
37831078 814 dm[15]= 75.6;
815 dm[16]= dm[13];
816 dm[17]= dm[16]+sandThick/cosR;
1283eee5 817
37831078 818 //
1283eee5 819
37831078 820 dm[18]= 248.4;
821 dm[19]= 59.0+(248.4-73.3)*tanR;
822 dm[20]= dm[19]+sandThick/cosR;
1283eee5 823
37831078 824 //
1283eee5 825
37831078 826 dm[21]= 248.4;
827 dm[22]= dm[19];
828 dm[23]= 70.2;
1283eee5 829
37831078 830 //
1283eee5 831
37831078 832 dm[24]= 250.4;
833 dm[25]= 66.0;
834 dm[26]= 70.2;
1283eee5 835
37831078 836 gMC->Gsvolu("TICR","PCON",idtmed[4],dm,27);
1283eee5 837
1283eee5 838
1283eee5 839
37831078 840 // Daughter volumes
1283eee5 841
37831078 842 // Tpc SAndwich 13 - Al
1283eee5 843
37831078 844 dm[0]= 0.;
845 dm[1]= 360.;
846 dm[2]= 2.;
1283eee5 847
37831078 848 //
1283eee5 849
37831078 850 dm[3]= 78.3;
851 dm[4]= 59.0+(78.3-73.3)*tanR;
852 dm[5]= dm[4]+sandThick/cosR;
1283eee5 853
37831078 854 //
1283eee5 855
37831078 856 dm[6]= 249.1;
857 dm[7]= 59.0+(249.1-73.3)*tanR;
858 dm[8]= dm[7]+sandThick/cosR;
1283eee5 859
37831078 860 //
1283eee5 861
37831078 862 gMC->Gsvolu("TS13","PCON",idtmed[4],dm,9);
1283eee5 863
37831078 864 // Tpc SAndwich 14 - Tedlar
1283eee5 865
37831078 866 dm[4]+= 5.e-3/cosR;
867 dm[5]-= 5.e-3/cosR;
1283eee5 868
37831078 869 //
1283eee5 870
37831078 871 dm[7]+= 5.e-3/cosR;
872 dm[8]+= 5.e-3/cosR;
1283eee5 873
37831078 874 gMC->Gsvolu("TS14","PCON",idtmed[9],dm,9);
1283eee5 875
37831078 876 // Tpc SAndwich 15 - Kevlar
1283eee5 877
37831078 878 dm[4]+= 5.e-3/cosR;
879 dm[5]-= 5.e-3/cosR;
1283eee5 880
37831078 881 //
1283eee5 882
37831078 883 dm[7]+= 5.e-3/cosR;
884 dm[8]+= 5.e-3/cosR;
1283eee5 885
37831078 886 gMC->Gsvolu("TS15","PCON",idtmed[5],dm,9);
1283eee5 887
37831078 888 // Tpc SAndwich 16 - NOMEX
1283eee5 889
37831078 890 dm[4]+= 0.06/cosR;
891 dm[5]-= 0.06/cosR;
1283eee5 892
37831078 893 //
1283eee5 894
37831078 895 dm[7]+= 0.06/cosR;
896 dm[8]+= 0.06/cosR;
1283eee5 897
37831078 898 gMC->Gsvolu("TS16","PCON",idtmed[6],dm,9);
1283eee5 899
37831078 900 // 16->15->14->13
1283eee5 901
37831078 902 gMC->Gspos("TS16",1,"TS15",0.,0.,0.,0,"ONLY");
903 gMC->Gspos("TS15",1,"TS14",0.,0.,0.,0,"ONLY");
904 gMC->Gspos("TS14",1,"TS13",0.,0.,0.,0,"ONLY");
1283eee5 905
37831078 906 // TS12->TICR
1283eee5 907
37831078 908 gMC->Gspos("TS13",1,"TICR",0.,0.,0.,0,"ONLY");
1283eee5 909
37831078 910 //------------------------------------------------------
911 // Tpc Inner Field Cage
912 // mother volume - Al, daughters - composite (sandwich)
913 //------------------------------------------------------
1283eee5 914
37831078 915 dm[0]= 0.;
916 dm[1]= 360.;
917 dm[2]=6.;
1283eee5 918
fe4da5cc 919 //
920
37831078 921 dm[3]= -253.0;
922 dm[4]= 70.7;
923 dm[5]= 79.2;
fe4da5cc 924
fe4da5cc 925 //
926
37831078 927 dm[6]= -251.0;
928 dm[7]= 70.7;
929 dm[8]= 79.2;
930
fe4da5cc 931 //
37831078 932
933 dm[9]= -251.0;
934 dm[10]= 77.15;
935 dm[11]= 79.2;
936
fe4da5cc 937 //
37831078 938
939 dm[12]= 251.0;
940 dm[13]= 77.15;
941 dm[14]= 79.2;
fe4da5cc 942
fe4da5cc 943 //
37831078 944
945 dm[15]= 251.0;
946 dm[16]= 66.0;
947 dm[17]= 79.2;
948
fe4da5cc 949 //
fe4da5cc 950
37831078 951 dm[18]= 253.0;
952 dm[19]= 66.0;
953 dm[20]= 79.2;
fe4da5cc 954
37831078 955 gMC->Gsvolu("TIFC","PCON",idtmed[4],dm,21);
fe4da5cc 956
37831078 957 // Daughter volumes
fe4da5cc 958
37831078 959 // Tpc Sandwich 17 - Al
960
961 dm[0]= 77.15;
962 dm[1]= 79.2;
963 dm[2]= 251.7;
964
965 gMC->Gsvolu("TS17","TUBE",idtmed[4],dm,3);
966
967 // Tpc Sandwich 18 - Tedlar
968
969 dm[0]+= 5.e-3;
970 dm[1]-= 5.e-3;
971
972 gMC->Gsvolu("TS18","TUBE",idtmed[9],dm,3);
973
974 // Tpc Sandwich 19 - Kevlar
975
976 dm[0]+= 5.e-3;
977 dm[1]-= 5.e-3;
978
979 gMC->Gsvolu("TS19","TUBE",idtmed[5],dm,3);
980
981 // Tpc Sandwich 20 - NOMEX
982
983 dm[0]+= 0.06;
984 dm[1]-= 0.06;
985
986 gMC->Gsvolu("TS20","TUBE",idtmed[6],dm,3);
987
988 // 20->19->18->17
989
990 gMC->Gspos("TS20",1,"TS19",0.,0.,0.,0,"ONLY");
991 gMC->Gspos("TS19",1,"TS18",0.,0.,0.,0,"ONLY");
992 gMC->Gspos("TS18",1,"TS17",0.,0.,0.,0,"ONLY");
993
994 // TS17->TIFC
995
996 gMC->Gspos("TS17",1,"TIFC",0.,0.,0.,0,"ONLY");
997
998 // TPC Rings
999
1000 dm[0]= 70.7;
1001 dm[1]= 79.2;
1002 dm[2]= 0.3;
1003
1004 gMC->Gsposp("TPCR",4,"TIIN",0.,0.,-253.3,0,"ONLY",dm,3);
1005
1006 dm[0]= 66.0;
1007 dm[1]= 70.2;
1008
1009 gMC->Gsposp("TPCR",5,"TIIN",0.,0.,250.7,0,"ONLY",dm,3);
1010
1011 dm[0]= 75.3;
1012 dm[1]= 79.2;
1013
1014 gMC->Gsposp("TPCR",6,"TIIN",0.,0.,253.3,0,"ONLY",dm,3);
1015
1016 // TICL->TIIN
1017
1018 gMC->Gspos("TICL",1,"TIIN",0.,0.,0.,0,"ONLY");
1019
1020 // TICR->TIIN
1021
1022 gMC->Gspos("TICR",1,"TIIN",0.,0.,0.,0,"ONLY");
1023
1024 // TIFC->TIIN
1025
1026 gMC->Gspos("TIFC",1,"TIIN",0.,0.,0.,0,"ONLY");
1027
1028 // Tpc Sandwich 21 - Al (central barrel)
1029
1030 dm[0]= 77.15;
1031 dm[1]= 79.2;
1032 dm[2]= 75.2;
1033
1034 gMC->Gsvolu("TS21","TUBE",idtmed[4],dm,3);
1035
1036 // Tpc Sandwich 22 - Tedlar (central barrel)
1037
1038 dm[0]+= 5.e-3;
1039 dm[1]-= 5.e-3;
1040
1041 gMC->Gsvolu("TS22","TUBE",idtmed[9],dm,3);
1042
1043 // Tpc Sandwich 23 - Kevlar (central barrel)
1044
1045 dm[0]+= 5.e-3;
1046 dm[1]-= 5.e-3;
1047
1048 gMC->Gsvolu("TS23","TUBE",idtmed[5],dm,3);
1049
1050 // Tpc Sandwich 24 - NOMEX (central barrel)
1051
1052 dm[0]+= 0.02;
1053 dm[1]-= 0.02;
1054
1055 gMC->Gsvolu("TS24","TUBE",idtmed[6],dm,3);
1056
1057 // 24->23->22->21
1058
1059 gMC->Gspos("TS24",1,"TS23",0.,0.,0.,0,"ONLY");
1060 gMC->Gspos("TS23",1,"TS22",0.,0.,0.,0,"ONLY");
1061 gMC->Gspos("TS22",1,"TS21",0.,0.,0.,0,"ONLY");
1062
1063 gMC->Gspos("TS21",1,"TIIN",0.,0.,0.,0,"ONLY");
1064
1065 // put everything into the TPC
1066
1067 gMC->Gspos("TIIN",1,"TPC ",0.,0.,0.,0,"ONLY");
1068
1069
1070 //---------------------------------------------------------
1071 // Tpc Dift Gas volume Nonsensitive (Ne-CO2 90/10)
1072 // and its daughters (HV membrane, rods, readout chambers)
1073 //---------------------------------------------------------
1074
1075 dm[0]= 79.2;
1076 dm[1]= 258.0;
1077 dm[2]= 253.6;
1078
1079 gMC->Gsvolu("TDGN","TUBE",idtmed[1],dm,3); // nonsensitive
1080
1081 // sector opening angles
1082
1083 Float_t innerOpenAngle = fTPCParam->GetInnerAngle();
1084 Float_t outerOpenAngle = fTPCParam->GetOuterAngle();
1085
1086 // sector angle shift
1087
1088 Float_t innerAngleShift = fTPCParam->GetInnerAngleShift();
1089
1090 // All above parameters are identical for inner and outer
1091 // sectors. The distinction is kept for the historical reasons
1092 // and eventually will disappear.
1093
1094 Float_t tanAlpha = TMath::Tan(0.5*innerOpenAngle);
1095 Float_t cosAlpha = TMath::Sqrt(1.+tanAlpha*tanAlpha);
1096 Float_t space;
1097
1098 //-------------------------------------------------------------------------
1099 // Tpc Inner Readout Chambers
1100 //-------------------------------------------------------------------------
1101
1102 dm[0]= 14.483;
1103 dm[1]= 23.3345;
1104 dm[2]= 1.6; // thickness
1105 dm[3]= 25.1;
1106
1107 gMC->Gsvolu("TIRC","TRD1",idtmed[4],dm,4);
1108
1109 // this volume will be positioned in the empty space
1110 // of the end-cap to avoid overlaps
1111
1112 dm[0]= 13.7305;
1113 dm[1]= 21.1895;
1114 dm[2]= 2.25;
1115 dm[3]= 21.15;
1116
1117 gMC->Gsvolu("TIC1","TRD1",idtmed[4],dm,4);
1118
1119 //------------------------------------------------
1120 // Tpc Inner readout chamber Pad Plane
1121 //------------------------------------------------
1122
1123 dm[0]= 14.483;
1124 dm[1]= 23.3345;
1125 dm[2]= 0.5;
1126 dm[3]= 25.1;
1127
1128 gMC->Gsvolu("TIPP","TRD1",idtmed[12],dm,4);
1129
1130 //
1131
1132 dm[0] -= 1.218511934;
1133 dm[1] -= 1.218511934;
1134 dm[2] = 0.35;
1135
1136 gMC->Gsvolu("TIC3","TRD1",idtmed[1],dm,4);
1137
1138 gMC->Gspos("TIC3",1,"TIPP",0.,0.15,0.,0,"ONLY");
1139
1140 gMC->Gspos("TIPP",1,"TIRC",0.,1.1,0.,0,"ONLY");
1141
1142 //----------------------------------------------
1143 // Tpc Readout Chambers Empty spaces - for both
1144 // inner and outer sectors
1145 //----------------------------------------------
1146
1147 gMC->Gsvolu("TRCE","TRD1",idtmed[0],dm,0);
1148
1149 // Inner sector - 4 spaces
1150
1151
1152 dm[3] = 4.7625;
1153 dm[0] = 12.472;
1154
1155 Float_t rr = 90.52;
1156 Float_t zz;
1157
1158 zz= -12.7875;
1159
1160 space = rr*tanAlpha-dm[0];
1161
1162 for(Int_t nsLow=0;nsLow<4;nsLow++){
1163
1164 rr += 9.525;
1165 dm[1]= rr*tanAlpha - space;
1166
1167 dm[2]=0.8;
1168
1169 gMC->Gsposp("TRCE",nsLow+1,"TIRC",0.,-0.8,zz,0,"ONLY",dm,4);
1170
1171 //
1172
1173 dm[2]= 1.2;
1174
1175 gMC->Gsposp("TRCE",nsLow+5,"TIC1",0.,1.05,zz-2.1,0,"ONLY",dm,4);
1176
1177 rr += 0.4;
1178 dm[0] = rr*tanAlpha - space;
1179 zz += (0.4+9.525);
1180
1181 }
1182
1183 dm[0]= 12.472;
1184 // dm[1] - this is the dm[1] from the previous TRCE
1185 dm[2]= 1.05;
1186 dm[3]= 19.65;
1187
1188 gMC->Gsposp("TRCE",9,"TIC1",0.,-1.2,0.,0,"ONLY",dm,4);
1189
1190 //
1191 // TPc Space for Connectors
1192 //
1193
1194 dm[0]= .3;
1195 dm[1]= .3;
1196 dm[2]= 4.5;
1197
1198 gMC->Gsvolu("TPSC","BOX ",idtmed[0],dm,3);
1199
1200 // TPC Connectors
1201
1202 dm[0]= .25;
1203 dm[1]= .15;
1204 dm[2]= 3.75;
1205
1206 gMC->Gsvolu("TPCC","BOX ",idtmed[13],dm,3);
1207
1208 gMC->Gspos("TPCC",1,"TPSC",0.,0.15,0.,0,"ONLY");
1209
1210 zz = -12.7875;
1211
1212 Float_t alpha;
1213 Float_t astep;
1214
1215 Float_t phi1,phi2,phi3,theta1,theta2,theta3; // rotation angles
1216
1217 // inner part of the inner sector - 2 x 20 holes
1218
1219 astep = 20.00096874/19.;
1220
1221 alpha = 10.00048437-astep;
1222
1223 Float_t x1,x2;
1224
1225 x1 = 13.31175725;
1226 x1 -= 0.996357832;
1227
1228 x2 = 15.06180253;
1229 x2 -= 1.163028812;
1230
1231 Int_t ncon;
1232
1233 for(ncon=0;ncon<20;ncon++){
1234
1235 phi1 = 0.;
1236 theta1 = 90.+alpha;
1237 phi2=90.;
1238 theta2 = 90.;
1239 phi3 = (alpha>0) ? 0. : 180.;
1240 theta3 = TMath::Abs(alpha);
1241
1242 AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1243
1244
1245
1246 gMC->Gspos("TPSC",ncon+1,"TIRC",x1,0.3,-12.7875,idrotm[nRotMat],"ONLY");
1247 gMC->Gspos("TPSC",ncon+21,"TIRC",x2,0.3,-2.8625,idrotm[nRotMat],"ONLY");
1248
1249
1250 x1 -= 1.296357833;
1251 x2 -= 1.463028812;
1252
1253 alpha -= astep;
1254 nRotMat++;
1255
1256 }
1257
1258 // outer part of the inner sector - 2 x 25 holes
1259
1260 astep = 20.00096874/24.;
1261 alpha = 10.00048437-astep;
1262
1263 x1 = 16.81184781;
1264 x1 -= 1.016295986;
1265
1266 x2 = 18.5618931;
1267 x2 -= 1.150914854;
1268
1269 for(ncon=0;ncon<25;ncon++){
1270
1271 phi1 = 0.;
1272 theta1 = 90.+alpha;
1273 phi2=90.;
1274 theta2 = 90.;
1275 phi3 = (alpha>0) ? 0. : 180.;
1276 theta3 = TMath::Abs(alpha);
1277
1278 AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1279
1280
1281
1282 gMC->Gspos("TPSC",ncon+41,"TIRC",x1,0.3,7.0625,idrotm[nRotMat],"ONLY");
1283 gMC->Gspos("TPSC",ncon+66,"TIRC",x2,0.3,16.9875,idrotm[nRotMat],"ONLY");
1284
1285
1286 x1 -= 1.316295986;
1287 x2 -= 1.450914854;
1288
1289 alpha -= astep;
1290 nRotMat++;
1291
1292 }
1293
1294 //--------------------------------------------------------------------------
1295 // TPC Outer Readout Chambers
1296 // this is NOT a final design
1297 //--------------------------------------------------------------------------
1298
1299 dm[0]= 23.3875;
1300 dm[1]= 43.524;
1301 dm[2]= 1.5; //thickness
1302 dm[3]= 57.1;
1303
1304 gMC->Gsvolu("TORC","TRD1",idtmed[4],dm,4);
1305
1306 //------------------------------------------------
1307 // Tpc Outer readout chamber Pad Plane
1308 //------------------------------------------------
1309
1310 dm[2]= 0.5;
1311
1312 gMC->Gsvolu("TOPP","TRD1",idtmed[12],dm,4);
1313
1314 dm[0] -= 1.218511934;
1315 dm[1] -= 1.218511934;
1316 dm[2] = 0.35;
1317
1318 gMC->Gsvolu("TOC3","TRD1",idtmed[1],dm,4);
1319
1320 gMC->Gspos("TOC3",1,"TOPP",0.,0.15,0.,0,"ONLY");
1321
1322 gMC->Gspos("TOPP",1,"TORC",0.,1.0,0.,0,"ONLY");
1323
1324 // empty space
1325
1326
1327 dm[0]= 21.035;
1328 dm[1]= 38.7205;
1329 dm[2]= 0.7;
1330 dm[3]= 50.15;
1331
1332 gMC->Gsposp("TRCE",10,"TORC",0.,-0.8,-2.15,0,"ONLY",dm,4);
1333
1334 dm[0]= 22.2935;
1335 dm[1]= 40.5085;
1336 dm[2]= 2.25;
1337 dm[3]= 51.65;
1338
1339 gMC->Gsvolu("TOC1","TRD1",idtmed[4],dm,4);
1340
1341 dm[0]= 21.35;
1342 dm[1]= 38.7205;
1343 dm[2]= 2.25;
1344 dm[3]= 50.15;
1345
1346 gMC->Gsposp("TRCE",11,"TOC1",0.,0.,0.,0,"ONLY",dm,4);
1347
1348
1349
1350 //-----------------------------------------------
1351 // Tpc Services Support Wheel
1352 //-----------------------------------------------
1353
1354 dm[0]=0.;
1355 dm[1]=360.;
1356 dm[2]=18.;
1357 dm[3]=2.;
1358
1359 dm[4]= -5.;
1360 dm[5]= 77.017;
1361 dm[6]= 255.267;
1362
1363 dm[7]= 5.;
1364 dm[8]= dm[5];
1365 dm[9]= dm[6];
1366
1367 gMC->Gsvolu("TSSW","PGON",idtmed[4],dm,10);
1368
1369 // Tpc Services Wheel Cover
1370
1371 dm[4]= -0.5;
1372 dm[7]= 0.5;
1373
1374 gMC->Gsvolu("TSWC","PGON",idtmed[4],dm,10);
1375
1376 // Tpc Service wheel Cover Empty space
1377
1378 dm[0]= 10.99;
1379 dm[1]= 39.599;
1380 dm[2]= .5;
1381 dm[3]= 81.125;
1382
1383 gMC->Gsvolu("TSCE","TRD1",idtmed[0],dm,4);
1384
1385 // Tpc services Wheel Empty Spaces
1386
1387 dm[0]= 13.18017507;
1388 dm[1]= 44.61045938;
1389 dm[2]= 4.;
1390 dm[3]= 89.125;
1391
1392 gMC->Gsvolu("TWES","TRD1",idtmed[0],dm,4);
1393
1394 // Tpc Services Wheel Bars
1395
1396 gMC->Gsvolu("TSWB","TRD1",idtmed[4],dm,0);
1397
1398 // bars-> TWES
1399
1400 dm[2]= 4.;
1401 dm[3]= .4;
1402
1403 dm[0]= 13.8149522;
1404 dm[1]= 13.95601379;
1405
1406 gMC->Gsposp("TSWB",1,"TWES",0.,0.,-85.125,0,"ONLY",dm,4);
1407
1408 dm[0]= 43.83462067;
1409 dm[1]= 43.97568225;
1410
1411 gMC->Gsposp("TSWB",2,"TWES",0.,0.,85.125,0,"ONLY",dm,4);
1412
1413 // TPc ELectronics - right now 30% X0 Si
1414
1415 dm[0]= 14.03813696;
1416 dm[1]= 43.3524075;
1417 dm[2]= 1.404;
1418 dm[3]= 83.125;
1419
1420 gMC->Gsvolu("TPEL","TRD1",idtmed[11],dm,4);
1421 gMC->Gspos("TPEL",1,"TWES",0.,0.,0.,0,"ONLY");
1422
1423 //--------------------------------------------------------------------------
1424 // End caps
1425 //--------------------------------------------------------------------------
1426
1427 // TPc Main Wheel - Al
1428
1429 dm[0]= 75.3;
1430 dm[1]= 264.8;
1431 dm[2]= 3.0;
1432
1433 gMC->Gsvolu("TPMW","TUBE",idtmed[4],dm,3);
1434
1435 // TPc Extra Wheel (to avoid overlapping) - Al
1436
1437 dm[0]= 264.8;
1438 dm[1]= 277.0;
1439 dm[2]= 1.95;
1440
1441 gMC->Gsvolu("TPEW","TUBE",idtmed[4],dm,3);
1442
1443 //--------------------------------------------------------------------------
1444 // Tpc Empty Space for the Readout chambers
1445 //--------------------------------------------------------------------------
1446
1447 Float_t rLow= 86.2;
1448 Float_t rUp= 243.5;
1449 Float_t dR = 0.5*(rUp-rLow);
1450
1451 space= 1.4/cosAlpha; // wheel ribs are 2.8 cm wide
1452
1453 dm[0]= rLow*tanAlpha-space;
1454 dm[1]= rUp*tanAlpha-space;
1455 dm[2]= 3.0;
1456 dm[3]= dR;
1457
1458 gMC->Gsvolu("TESR","TRD1",idtmed[0],dm,4);
1459
1460 // TIC1->TESR
1461
1462
1463 gMC->Gspos("TIC1",1,"TESR",0.,0.75,-dR+23.97,0,"ONLY");
1464
1465
1466 // TOC1->TESR
1467
1468 gMC->Gspos("TOC1",1,"TESR",0.,0.75,dR-55.02,0,"ONLY");
1469
1470 // Tpc Empty Space Bars - Al (daughters of TESR)
1471
1472 Float_t zBar;
1473
1474 gMC->Gsvolu("TESB","TRD1",idtmed[4],dm,0);
1475
1476 // lower bar
1477
1478 dm[0]= rLow*tanAlpha-space;
1479 dm[1]= 88.7*tanAlpha-space;
1480 dm[2]= 0.95;
1481 dm[3]= 1.275;
1482
1483 zBar = -dR+dm[3];
1484
1485 gMC->Gsposp("TESB",1,"TESR",0.,2.05,zBar,0,"ONLY",dm,4);
1486
1487 // middle bar
1488
1489 dm[0]= 131.65*tanAlpha-space;
1490 dm[1]= 136.5*tanAlpha-space;
1491 dm[3]= 2.425;
1492
1493 zBar = -dR +131.65+dm[3]-rLow;
1494
1495 gMC->Gsposp("TESB",2,"TESR",0.,2.05,zBar,0,"ONLY",dm,4);
1496
1497 // upper bar
1498
1499 dm[0]= 240.4*tanAlpha-space;
1500 dm[1]= rUp*tanAlpha-space;
1501 dm[3]= 1.55;
1502
1503 zBar = dR-dm[3];
1504
1505 gMC->Gsposp("TESB",3,"TESR",0.,2.05,zBar,0,"ONLY",dm,4);
1506
1507 //------------------------------------------------------
1508 // TPc Lower "S" Sectors
1509 //------------------------------------------------------
1510
1511
1512 Float_t inSecLowEdge = fTPCParam->GetInnerRadiusLow();
1513 Float_t inSecUpEdge = fTPCParam->GetInnerRadiusUp();
1514
1515 dm[0] = inSecLowEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1516 dm[1] = inSecUpEdge*TMath::Tan(0.5*innerOpenAngle)-0.01;
1517 dm[2] = 0.5*(250. - 0.3);
1518 dm[3] = 0.5*(inSecUpEdge-inSecLowEdge);
1519
1520 gMC->Gsvolu("TPLS", "TRD1", idtmed[2], dm, 4); // sensitive
1521
1522 //----------------------------------------------------------
1523 // TPc Upper Sectors
1524 //----------------------------------------------------------
1525
1526 Float_t ouSecLowEdge = fTPCParam->GetOuterRadiusLow();
1527 Float_t ouSecUpEdge = fTPCParam->GetOuterRadiusUp();
1528
1529 dm[0] = ouSecLowEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;
1530 dm[1] = ouSecUpEdge*TMath::Tan(0.5*outerOpenAngle)-0.01;
1531 dm[2] = 0.5*(250. - 0.3);
1532 dm[3] = 0.5*(ouSecUpEdge-ouSecLowEdge);
1533
1534 gMC->Gsvolu("TPUS", "TRD1", idtmed[2], dm, 4); // sensitive
1535
1536
37831078 1537
37831078 1538
1539 gMC->Gsvolu("TPSS","TRD1",idtmed[2],dm,0); // sensitive
1540
1541 Int_t nofStrips,nstr;
1542 Float_t r1,r2,zs;
1543 Float_t stripThick = 0.01; // 100 microns
1544 Float_t deadSpace;
1545
1546 // inner sector
1547
d4c354b9 1548
1549 // if all lower sectors selected define only 1 strip
1550
1551 nofStrips=((fSecAL <0)||(fSecAL>=0 && fSens<0)) ? 1 : fTPCParam->GetNRowLow();
37831078 1552 deadSpace = fTPCParam->GetInnerWireMount();
1553
1554 dm[2] = 0.5*(250. - 0.3);
1555 dm[3] = 0.5 * stripThick;
1556
d4c354b9 1557
37831078 1558 for(nstr=0;nstr<nofStrips;nstr++){
1559
1560 r1 = fTPCParam->GetPadRowRadiiLow(nstr);
1561 r2 = r1 + stripThick;
1562 dm[0] = r1 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1563 dm[1] = r2 * TMath::Tan(0.5*innerOpenAngle) - deadSpace;
1564 zs = -inSecLowEdge -0.5*(inSecUpEdge-inSecLowEdge);
1565 zs += r1;
1566 zs += dm[3];
1567
1568 gMC->Gsposp("TPSS", nstr+1, "TPLS", 0., 0., zs, 0, "ONLY", dm, 4);
1569
37831078 1570
1571 }
1572
d4c354b9 1573 // strips only if several upper sectors selected end fSens > 0
1574
1575 if(fSecAU >=0 && fSens >0){
1576
37831078 1577 Int_t nsSave = nofStrips;
1578
1579 // outer sector
1580
1581 nofStrips = fTPCParam->GetNRowUp();
1582 deadSpace = fTPCParam->GetOuterWireMount();
1583
1584 dm[2] = 0.5*(250. - 0.3);
1585 dm[3] = 0.5 * stripThick;
d4c354b9 1586
37831078 1587
1588 for(nstr=0;nstr<nofStrips;nstr++){
1589
1590 r1 = fTPCParam->GetPadRowRadiiUp(nstr);
1591 r2 = r1 + stripThick;
1592 dm[0] = r1 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1593 dm[1] = r2 * TMath::Tan(0.5*outerOpenAngle) - deadSpace;
1594 zs = -ouSecLowEdge -0.5*(ouSecUpEdge-ouSecLowEdge);
1595 zs += r1;
1596 zs += dm[3];
1597
1598 gMC->Gsposp("TPSS", nstr+1+nsSave, "TPUS", 0., 0., zs, 0, "ONLY", dm, 4);
1599
1600 }
d4c354b9 1601 }
37831078 1602
1603 //-------------------------------------------------------
1604 // positioning of the empty spaces into the main wheel
1605 // and readout chambers and sectors into the drift gas
1606 //-------------------------------------------------------
1607
1608 Float_t rCenter,xc,yc;
1609 Float_t rInner,rOuter; // center of the inner and outer chamber
1610
1611 rCenter = rLow+dR;
1612
1613 rInner = 108.07;
1614 rOuter = 190.68;
1615
1616 for(Int_t ns=0; ns<nInnerSector;ns++){
1617
1618 phi1 = ns * innerOpenAngle + innerAngleShift;
1619 phi1 *= kRaddeg; // in degrees
1620
1621 phi1 = (Float_t)TMath::Nint(phi1) + 270.;
1622
1623 if (phi1 > 360.) phi1 -= 360.;
1624
1625 theta1 = 90.;
1626 phi2 = 90.;
1627 theta2 = 180.;
1628 phi3 = ns * innerOpenAngle + innerAngleShift;
1629 phi3 *= kRaddeg; // in degrees
1630
1631 phi3 = (Float_t)TMath::Nint(phi3);
1632
1633 if(phi3 > 360.) phi3 -= 360.;
1634
1635 theta3 = 90.;
1636
1637 // "holes"->End plate
1638
1639 xc = rCenter*TMath::Cos(phi3*kDegrad);
1640 yc = rCenter*TMath::Sin(phi3*kDegrad);
1641
1642 AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1643
1644 gMC->Gspos("TESR",ns+1,"TPMW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1645
1646 // TSCE->TSWC (services wheel volumes)
1647
1648 xc = 166.142*TMath::Cos(phi3*kDegrad);
1649 yc = 166.142*TMath::Sin(phi3*kDegrad);
1650
1651 gMC->Gspos("TSCE",ns+1,"TSWC",xc,yc,0.,idrotm[nRotMat],"ONLY");
1652 gMC->Gspos("TWES",ns+1,"TSSW",xc,yc,0.,idrotm[nRotMat],"ONLY");
1653
1654 // readout chambers->TDGN (drift gas)
1655
1656 xc = rInner*TMath::Cos(phi3*kDegrad);
1657 yc = rInner*TMath::Sin(phi3*kDegrad);
1658
1659 gMC->Gspos("TIRC",ns+1,"TDGN",xc,yc,252.,idrotm[nRotMat],"ONLY");
1660
1661 // here lower sectors
1662
1663 if(fSecAL <0){
1664
1665 // all lower sectors are positioned
1666
1667 gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.15,idrotm[nRotMat],"ONLY");
1668 gMC->
1669 Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.15,idrotm[nRotMat],"ONLY");
1670 }
1671 else{
1672
1673 // only selected sectors are positioned (up to 6 sectors)
1674
1675 for(Int_t sel=0;sel<6;sel++){
1676
1677 if(fSecLows[sel] == ns){
1678 gMC->Gspos("TPLS",ns+1,"TDGN",xc,yc,125.15,idrotm[nRotMat],"ONLY");
1679 }
1680 else if(fSecLows[sel] == ns+nInnerSector){
1681 gMC->
1682 Gspos("TPLS",ns+nInnerSector+1,"TDGN",xc,yc,-125.15,idrotm[nRotMat],"ONLY");
1683 }
1684 }
1685 } // lower sectors finished
1686
1687 xc = rOuter*TMath::Cos(phi3*kDegrad);
1688 yc = rOuter*TMath::Sin(phi3*kDegrad);
1689
1690 gMC->Gspos("TORC",ns+1,"TDGN",xc,yc,252.1,idrotm[nRotMat],"ONLY");
1691
1692 // here upper sectors
1693
1694 if(fSecAU <0){
1695
1696 // all upper sectors
1697
1698 gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.15,idrotm[nRotMat],"ONLY");
1699 gMC->
1700 Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.15,idrotm[nRotMat],"ONLY");
1701 }
1702 else{
1703
1704 // only selected sectors (up to 12)
1705
1706 for(Int_t sel=0;sel<12;sel++){
1707 if(fSecUps[sel] == ns+2*nInnerSector){
1708 gMC->Gspos("TPUS",ns+1,"TDGN",xc,yc,125.15,idrotm[nRotMat],"ONLY");
1709 }
1710 else if(fSecUps[sel] == ns+2*nInnerSector+nOuterSector){
1711 gMC->
1712 Gspos("TPUS",ns+nOuterSector+1,"TDGN",xc,yc,-125.15,idrotm[nRotMat],"ONLY");
1713 }
1714 }
1715 } // upper sectors finished
1716
1717 nRotMat++;
1718
1719 theta2 = 0.; // reflection, needed for readout chambers!
1720
1721 AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1722
1723 xc = rInner*TMath::Cos(phi3*kDegrad);
1724 yc = rInner*TMath::Sin(phi3*kDegrad);
1725
1726 gMC->Gspos("TIRC",ns+nInnerSector+1,"TDGN",xc,yc,-252.,idrotm[nRotMat],"ONLY");
1727
1728 xc = rOuter*TMath::Cos(phi3*kDegrad);
1729 yc = rOuter*TMath::Sin(phi3*kDegrad);
1730
1731 gMC->Gspos("TORC",ns+nOuterSector+1,"TDGN",xc,yc,-252.1,idrotm[nRotMat],"ONLY");
1732
1733 nRotMat++;
1734
1735
1736 }
1737
1738 // reflection matrix
1739
1740 theta1 = 90.;
1741 phi1 = 0.;
1742 theta2 = 90.;
1743 phi2 = 270.;
1744 theta3 = 180.;
1745 phi3 = 0.;
1746
1747 AliMatrix(idrotm[nRotMat], theta1, phi1, theta2, phi2, theta3, phi3);
1748
1749
1750 // TPMW->TPC
1751
1752 gMC->Gspos("TPMW",1,"TPC ",0.,0.,256.6,0,"ONLY");
1753 gMC->Gspos("TPMW",2,"TPC ",0.,0.,-256.6,idrotm[nRotMat],"ONLY");
1754 gMC->Gspos("TPEW",1,"TPC ",0.,0.,257.65,0,"ONLY");
1755 gMC->Gspos("TPEW",2,"TPC ",0.,0.,-257.65,0,"ONLY");
1756
1757
1758
1759 //-------------------------------------------------------
1760 // Tpc High Voltage Membrane - NOMEX honeycomb
1761 //-------------------------------------------------------
1762
1763 dm[0]=0.,
1764 dm[1]=360.;
1765 dm[2]=18.;
1766 dm[3]=2.;
1767
1768 //
1769
1770 dm[4]= -0.3;
1771 dm[5]= 81.156;
1772 dm[6]= 253.386;
1773
1774 //
1775
1776 dm[7]= 0.3;
1777 dm[8]= dm[5];
1778 dm[9]= dm[6];
1779
1780 gMC->Gsvolu("THVM","PGON",idtmed[6],dm,10);
1781
1782 gMC->Gspos("THVM",1,"TDGN",0.,0.,0.,0,"ONLY");
1783
1784 //----------------------------------------------------------
1785 // TPc Support Rods - MAKROLON
1786 //----------------------------------------------------------
1787
1788 dm[0]= 0.9;
1789 dm[1]= 1.2;
1790 dm[2]= 126.65;
1791
1792 gMC->Gsvolu("TPSR","TUBE",idtmed[7],dm,3);
1793
1794 for(Int_t nrod=1;nrod<18;nrod++){
1795 Float_t angle=innerOpenAngle*(Float_t)nrod;
1796
1797 xc=82.4*TMath::Cos(angle);
1798 yc=82.4*TMath::Sin(angle);
1799
1800 gMC->Gspos("TPSR",nrod,"TDGN",xc,yc,126.95,0,"ONLY");
1801 gMC->Gspos("TPSR",nrod+17,"TDGN",xc,yc,-126.95,0,"ONLY");
1802
1803 xc=254.2*TMath::Cos(angle);
1804 yc=254.2*TMath::Sin(angle);
1805
1806 gMC->Gspos("TPSR",nrod+34,"TDGN",xc,yc,126.95,0,"ONLY");
1807 gMC->Gspos("TPSR",nrod+51,"TDGN",xc,yc,-126.95,0,"ONLY");
1808
1809 }
1810
1811 //----------------------------------------------------------
1812 // Tpc High Voltage rod - MAKROLON + Copper cable
1813 //----------------------------------------------------------
1814
1815 // rod with cable (Left)
1816
1817 dm[0]=0.;
1818 dm[1]=2.25;
1819 dm[2]=126.65;
1820
1821 gMC->Gsvolu("THVL","TUBE",idtmed[7],dm,3);
1822
1823 // HV cable
1824
1825 dm[0]=0.;
1826 dm[1]=0.3;
1827 dm[2]=126.65;
1828
1829 gMC->Gsvolu("THVC","TUBE",idtmed[10],dm,3);
1830
1831 // empty space
1832
1833 dm[0]=0.3;
1834 dm[1]=1.;
1835 dm[2]=126.65;
1836
1837 gMC->Gsvolu("THVE","TUBE",idtmed[1],dm,3);
1838
1839 gMC->Gspos("THVC",1,"THVL",0.,0.,0.,0,"ONLY");
1840 gMC->Gspos("THVE",1,"THVL",0.,0.,0.,0,"ONLY");
1841
1842 // rod without cable
1843
1844 dm[0]=1.8;
1845 dm[1]=2.25;
1846 dm[2]=126.65;
1847
1848 gMC->Gsvolu("THVR","TUBE",idtmed[7],dm,3);
1849
1850
1851
1852 gMC->Gspos("THVL",1,"TDGN",82.4,0.,-126.95,0,"ONLY");
1853 gMC->Gspos("THVL",2,"TDGN",254.2,0.,-126.95,0,"ONLY");
1854
1855 gMC->Gspos("THVR",1,"TDGN",82.4,0.,126.95,0,"ONLY");
1856 gMC->Gspos("THVR",2,"TDGN",254.2,0.,126.95,0,"ONLY");
1857
1858
1859
1860 gMC->Gspos("TDGN",1,"TPC ",0.,0.,0.,0,"ONLY");
1861
1862 // services wheel cover -> wheel
1863
1864
1865 gMC->Gspos("TSWC",1,"TSSW",0.,0.,4.5,0,"ONLY");
1866 gMC->Gspos("TSWC",2,"TSSW",0.,0.,-4.5,0,"ONLY");
1867
1868
1869 // put the wheel into the TPC
1870
1871 gMC->Gspos("TSSW",1,"TPC ",0.,0.,278.7,0,"ONLY");
1872 gMC->Gspos("TSSW",2,"TPC ",0.,0.,-278.7,0,"ONLY");
1873
1874 gMC->Gsord("TPMW",6);
d4c354b9 1875 if(fSecAL >=0) gMC->Gsord("TPLS",3);
1876 if(fSecAU >=0 && fSens >0) gMC->Gsord("TPUS",3);
37831078 1877 gMC->Gsord("TDGN",6);
1878 gMC->Gsord("TSSW",6);
1879 gMC->Gsord("TSWC",6);
1880
1881 // put the TPC into ALIC (main mother volume)
1882
1883 gMC->Gspos("TPC ", 1, "ALIC", 0, 0, 0, 0, "ONLY");
1884
1885} // end of function
1886
1887//_____________________________________________________________________________
1888void AliTPCv2::DrawDetector()
1889{
1890 //
1891 // Draw a shaded view of the Time Projection Chamber version 1
1892 //
1893
1894 // Set everything unseen
1895 gMC->Gsatt("*", "seen", -1);
1896 //
1897 // Set ALIC mother transparent
1898 gMC->Gsatt("ALIC","SEEN",0);
1899 //
1900 // Set the volumes visible
1901 //
1902
1903 gMC->Gsatt("TPC ","SEEN",0);
1904 gMC->Gsatt("TOIN","SEEN",1);
1905 gMC->Gsatt("TOIN","COLO",7);
1906 gMC->Gsatt("TPCR","SEEN",0);
1907 gMC->Gsatt("TOCV","SEEN",1);
1908 gMC->Gsatt("TOCV","COLO",4);
1909 gMC->Gsatt("TSA1","SEEN",0);
1910 gMC->Gsatt("TSA2","SEEN",0);
1911 gMC->Gsatt("TSA3","SEEN",0);
1912 gMC->Gsatt("TSA4","SEEN",0);
1913 gMC->Gsatt("TOFC","SEEN",1);
1914 gMC->Gsatt("TOFC","COLO",4);
1915 gMC->Gsatt("TSA5","SEEN",0);
1916 gMC->Gsatt("TSA6","SEEN",0);
1917 gMC->Gsatt("TSA7","SEEN",0);
1918 gMC->Gsatt("TSA8","SEEN",0);
1919 gMC->Gsatt("TIIN","COLO",7);
1920 gMC->Gsatt("TIIN","SEEN",1);
1921 gMC->Gsatt("TICL","SEEN",0);
1922 gMC->Gsatt("TSA9","SEEN",0);
1923 gMC->Gsatt("TS10","SEEN",0);
1924 gMC->Gsatt("TS11","SEEN",0);
1925 gMC->Gsatt("TS12","SEEN",0);
1926 gMC->Gsatt("TICR","SEEN",0);
1927 gMC->Gsatt("TS13","SEEN",0);
1928 gMC->Gsatt("TS14","SEEN",0);
1929 gMC->Gsatt("TS15","SEEN",0);
1930 gMC->Gsatt("TS16","SEEN",0);
1931 gMC->Gsatt("TIFC","SEEN",1);
1932 gMC->Gsatt("TIFC","COLO",4);
1933 gMC->Gsatt("TS17","SEEN",0);
1934 gMC->Gsatt("TS18","SEEN",0);
1935 gMC->Gsatt("TS19","SEEN",0);
1936 gMC->Gsatt("TS20","SEEN",0);
1937 gMC->Gsatt("TS21","SEEN",0);
1938 gMC->Gsatt("TS22","SEEN",0);
1939 gMC->Gsatt("TS23","SEEN",0);
1940 gMC->Gsatt("TS24","SEEN",0);
1941 gMC->Gsatt("TDGN","SEEN",0);
1942 gMC->Gsatt("TIRC","SEEN",0);
1943 gMC->Gsatt("TIC1","SEEN",1);
1944 gMC->Gsatt("TIPP","SEEN",0);
1945 gMC->Gsatt("TIC3","SEEN",0);
1946 gMC->Gsatt("TRCE","SEEN",0);
1947 gMC->Gsatt("TPSC","SEEN",0);
1948 gMC->Gsatt("TPCC","SEEN",0);
1949 gMC->Gsatt("TORC","SEEN",0);
1950 gMC->Gsatt("TOPP","SEEN",0);
1951 gMC->Gsatt("TOC3","SEEN",0);
1952 gMC->Gsatt("TOC1","SEEN",1);
1953 gMC->Gsatt("TSSW","SEEN",1);
1954 gMC->Gsatt("TSWC","SEEN",1);
1955 gMC->Gsatt("TSCE","SEEN",1);
1956 gMC->Gsatt("TSSW","COLO",3);
1957 gMC->Gsatt("TSWC","COLO",3);
1958 gMC->Gsatt("TSCE","COLO",6);
1959 gMC->Gsatt("TWES","SEEN",0);
1960 gMC->Gsatt("TSWB","SEEN",0);
1961 gMC->Gsatt("TPEL","SEEN",0);
1962 gMC->Gsatt("TPMW","SEEN",1);
1963 gMC->Gsatt("TPEW","SEEN",1);
1964 gMC->Gsatt("TESR","SEEN",1);
1965 gMC->Gsatt("TPMW","COLO",12);
1966 gMC->Gsatt("TPEW","COLO",12);
1967 gMC->Gsatt("TWES","COLO",5);
1968 gMC->Gsatt("TIC1","COLO",5);
1969 gMC->Gsatt("TOC1","COLO",5);
1970 gMC->Gsatt("TESB","SEEN",0);
1971 gMC->Gsatt("TPLS","SEEN",0);
1972 gMC->Gsatt("TPUS","SEEN",0);
1973 gMC->Gsatt("TPSS","SEEN",0);
1974 gMC->Gsatt("THVM","SEEN",1);
1975 gMC->Gsatt("THVM","COLO",11);
1976 gMC->Gsatt("TPSR","SEEN",0);
1977 gMC->Gsatt("THVL","SEEN",0);
1978 gMC->Gsatt("THVC","SEEN",0);
1979 gMC->Gsatt("THVE","SEEN",0);
1980 gMC->Gsatt("THVR","SEEN",0);
1981
1982 //
1983 gMC->Gdopt("hide", "on");
1984 gMC->Gdopt("shad", "on");
1985 gMC->Gsatt("*", "fill", 7);
1986 gMC->SetClipBox(".");
1987 gMC->SetClipBox("TPMW",-300,300,-300,300,254.,270.);
1988 gMC->SetClipBox("TESR",-300,300,-300,300,254.,270.);
1989 gMC->SetClipBox("TSSW",-300,300,-300,300,283.,284.);
1990 gMC->SetClipBox("TSWC",-300,300,-300,300,283.,284.);
1991 gMC->SetClipBox("*", 0, 300, -300, 300, -290, 290);
1992 gMC->DefaultRange();
1993 gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .025, .025);
1994 gMC->Gdhead(1111, "Time Projection Chamber");
1995 gMC->Gdman(18, 4, "MAN");
1996 gMC->Gdopt("hide","off");
1997}
1998
1999//_____________________________________________________________________________
2000void AliTPCv2::CreateMaterials()
2001{
2002 //
2003 // Define materials for version 2 of the Time Projection Chamber
2004 //
2005
2006 AliTPC::CreateMaterials();
2007}
2008
2009//_____________________________________________________________________________
2010void AliTPCv2::Init()
2011{
2012 //
2013 // Initialises version 2 of the TPC after that it has been built
2014 //
2015
2016 Int_t *idtmed = fIdtmed->GetArray();
2017
2018 AliTPC::Init();
d4c354b9 2019
2020
2021
2022 fIdSens=gMC->VolId("TPSS");
2023
2024 fIdLSec=gMC->VolId("TPLS"); // lower sector
37831078 2025 fIdUSec=gMC->VolId("TPUS"); // upper sector
2026
2027 gMC->SetMaxNStep(30000); // max. number of steps increased
2028
2029 gMC->Gstpar(idtmed[2],"LOSS",5); // specific energy loss
2030
2031 printf("*** TPC version 2 initialized ***\n");
2032 printf("Maximum number of steps = %d\n",gMC->GetMaxNStep());
2033
2034 //
fe4da5cc 2035
2036}
2037
2038//_____________________________________________________________________________
2039void AliTPCv2::StepManager()
2040{
2041 //
2042 // Called for every step in the Time Projection Chamber
2043 //
2044
2045 //
2046 // parameters used for the energy loss calculations
2047 //
73042f01 2048 const Float_t kprim = 14.35; // number of primary collisions per 1 cm
2049 const Float_t kpoti = 20.77e-9; // first ionization potential for Ne/CO2
2050 const Float_t kwIon = 35.97e-9; // energy for the ion-electron pair creation
fe4da5cc 2051
2052
73042f01 2053 const Float_t kbig = 1.e10;
fe4da5cc 2054
2055 Int_t id,copy;
2056 Float_t hits[4];
2057 Int_t vol[2];
2058 TClonesArray &lhits = *fHits;
37831078 2059 TLorentzVector p;
fe4da5cc 2060
37831078 2061 vol[1]=0; // preset row number to 0
fe4da5cc 2062
2063 //
2064
73042f01 2065 gMC->SetMaxStep(kbig);
fe4da5cc 2066
0a6d8768 2067 if(!gMC->IsTrackAlive()) return; // particle has disappeared
fe4da5cc 2068
cfce8870 2069 Float_t charge = gMC->TrackCharge();
fe4da5cc 2070
2071 if(TMath::Abs(charge)<=0.) return; // take only charged particles
2072
37831078 2073 // check the sensitive volume
2074
2075 id = gMC->CurrentVolID(copy); // current volume Id
2076
2077 if(id == fIdLSec){
2078 vol[0] = copy-1; // lower sector number
2079 }
2080 else if(id == fIdUSec){
2081 vol[0] = copy+fTPCParam->GetNInnerSector()-1; // upper sector number
2082 }
2083 else if(id == fIdSens && gMC->IsTrackEntering()){
2084
2085 // track is entering the sensitive strip
2086
2087 vol[1]= copy-1; // row number (absolute)
2088
2089 // sector type
2090
2091 id = gMC->CurrentVolOffID(1,copy);
2092
2093 if(id == fIdLSec){
2094
2095 // lower sector
2096
2097 vol[0] = copy-1; // sector number
2098
fe4da5cc 2099 }
37831078 2100 else {
2101
2102 // upper sector
2103
2104 vol[0] = copy-1+fTPCParam->GetNInnerSector(); // sector number
2105 vol[1] -= fTPCParam->GetNRowLow(); // row number
2106
2107 }
2108
2109 if(vol[1] == 0){
2110
2111 // because Jouri wants to have this
2112
2113 gMC->TrackMomentum(p);
2114 hits[0]=p[0];
2115 hits[1]=p[1];
2116 hits[2]=p[2];
fe4da5cc 2117 hits[3]=0.; // this hit has no energy loss
2118 new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
37831078 2119
930ee558 2120 }
37831078 2121
930ee558 2122 gMC->TrackPosition(p);
2123 hits[0]=p[0];
2124 hits[1]=p[1];
2125 hits[2]=p[2];
2126 hits[3]=0.; // this hit has no energy loss
2127 new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
2128
2129
37831078 2130 }
fe4da5cc 2131 else return;
37831078 2132
2133 //-----------------------------------------------------------------
fe4da5cc 2134 // charged particle is in the sensitive volume
37831078 2135 //-----------------------------------------------------------------
fe4da5cc 2136
cfce8870 2137 if(gMC->TrackStep() > 0) {
fe4da5cc 2138
73042f01 2139 Int_t nel = (Int_t)(((gMC->Edep())-kpoti)/kwIon) + 1;
fe4da5cc 2140 nel=TMath::Min(nel,300); // 300 electrons corresponds to 10 keV
2141
37831078 2142 gMC->TrackPosition(p);
2143 hits[0]=p[0];
2144 hits[1]=p[1];
2145 hits[2]=p[2];
fe4da5cc 2146 hits[3]=(Float_t)nel;
2147
2148 // Add this hit
2149
2150 new(lhits[fNhits++]) AliTPChit(fIshunt,gAlice->CurrentTrack(),vol,hits);
2151
2152 }
2153
2154 // Stemax calculation for the next step
2155
2156 Float_t pp;
0a6d8768 2157 TLorentzVector mom;
2158 gMC->TrackMomentum(mom);
2159 Float_t ptot=mom.Rho();
73042f01 2160 Float_t betaGamma = ptot/gMC->TrackMass();
fe4da5cc 2161
69e40cce 2162 Int_t pid=gMC->TrackPid();
cc80f89e 2163 if((pid==kElectron || pid==kPositron) && ptot > 0.002)
fe4da5cc 2164 {
73042f01 2165 pp = kprim*1.58; // electrons above 20 MeV/c are on the plateau!
fe4da5cc 2166 }
2167 else
2168 {
73042f01 2169 pp=kprim*BetheBloch(betaGamma);
fe4da5cc 2170 if(TMath::Abs(charge) > 1.) pp *= (charge*charge);
2171 }
2172
2173 Float_t random[1];
cfce8870 2174 gMC->Rndm(random,1); // good, old GRNDM from Geant3
fe4da5cc 2175
2176 Double_t rnd = (Double_t)random[0];
2177
cfce8870 2178 gMC->SetMaxStep(-TMath::Log(rnd)/pp);
fe4da5cc 2179
2180}
2181
2182//_____________________________________________________________________________
2183Float_t AliTPCv2::BetheBloch(Float_t bg)
2184{
2185 //
2186 // Bethe-Bloch energy loss formula
2187 //
73042f01 2188 const Double_t kp1=0.76176e-1;
2189 const Double_t kp2=10.632;
2190 const Double_t kp3=0.13279e-4;
2191 const Double_t kp4=1.8631;
2192 const Double_t kp5=1.9479;
fe4da5cc 2193
2194 Double_t dbg = (Double_t) bg;
2195
2196 Double_t beta = dbg/TMath::Sqrt(1.+dbg*dbg);
2197
73042f01 2198 Double_t aa = TMath::Power(beta,kp4);
2199 Double_t bb = TMath::Power(1./dbg,kp5);
fe4da5cc 2200
73042f01 2201 bb=TMath::Log(kp3+bb);
fe4da5cc 2202
73042f01 2203 return ((Float_t)((kp2-aa-bb)*kp1/aa));
fe4da5cc 2204}
73042f01 2205
2206