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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$Log$
18Revision 1.18 2000/05/08 16:17:27 cblume
19Merge TRD-develop
20
21Revision 1.17.2.1 2000/05/08 14:28:59 cblume
22Introduced SetPHOShole() and SetRICHhole(). AliTRDrecPoint container is now a TObjArray
23
24Revision 1.17 2000/02/28 19:10:26 cblume
25Include the new TRD classes
26
27Revision 1.16.2.2 2000/02/28 17:53:24 cblume
28Introduce TRD geometry classes
29
30Revision 1.16.2.1 2000/02/28 17:04:19 cblume
31Include functions and data members for AliTRDrecPoint
32
33Revision 1.16 2000/01/19 17:17:35 fca
34Introducing a list of lists of hits -- more hits allowed for detector now
35
36Revision 1.15 1999/11/02 17:04:25 fca
37Small syntax change for HP compiler
38
39Revision 1.14 1999/11/02 16:57:02 fca
40Avoid non ansi warnings on HP compilers
41
42Revision 1.13 1999/11/02 16:35:56 fca
43New version of TRD introduced
44
45Revision 1.12 1999/11/01 20:41:51 fca
46Added protections against using the wrong version of FRAME
47
48Revision 1.11 1999/09/29 09:24:34 fca
49Introduction of the Copyright and cvs Log
50
51*/
52
53///////////////////////////////////////////////////////////////////////////////
54// //
55// Transition Radiation Detector //
56// This class contains the basic functions for the Transition Radiation //
57// Detector. //
58// //
59///////////////////////////////////////////////////////////////////////////////
60
61#include <stdlib.h>
62
63#include <TMath.h>
64#include <TNode.h>
65#include <TPGON.h>
66
67#include "AliTRD.h"
68#include "AliRun.h"
69#include "AliConst.h"
70#include "AliTRDdigitizer.h"
71#include "AliTRDclusterizer.h"
72#include "AliTRDgeometryHole.h"
73#include "AliTRDgeometryFull.h"
74#include "AliTRDrecPoint.h"
75
76ClassImp(AliTRD)
77
78//_____________________________________________________________________________
79AliTRD::AliTRD()
80{
81 //
82 // Default constructor
83 //
84
85 fIshunt = 0;
86 fGasMix = 0;
87 fHits = 0;
88 fDigits = 0;
89
90 fRecPoints = 0;
91 fNRecPoints = 0;
92
93 fGeometry = 0;
94
95}
96
97//_____________________________________________________________________________
98AliTRD::AliTRD(const char *name, const char *title)
99 : AliDetector(name,title)
100{
101 //
102 // Standard constructor for the TRD
103 //
104
105 // Check that FRAME is there otherwise we have no place where to
106 // put TRD
107 AliModule* FRAME=gAlice->GetModule("FRAME");
108 if (!FRAME) {
109 Error("Ctor","TRD needs FRAME to be present\n");
110 exit(1);
111 }
112
113 // Define the TRD geometry according to the FRAME geometry
114 if (FRAME->IsVersion() == 0) {
115 // Geometry with hole
116 fGeometry = new AliTRDgeometryHole();
117 }
118 else if (FRAME->IsVersion() == 1) {
119 // Geometry without hole
120 fGeometry = new AliTRDgeometryFull();
121 }
122 else {
123 Error("Ctor","Could not find valid FRAME version\n");
124 exit(1);
125 }
126
127 // Allocate the hit array
128 fHits = new TClonesArray("AliTRDhit" ,405);
129 gAlice->AddHitList(fHits);
130
131 // Allocate the digits array
132 fDigits = 0;
133
134 // Allocate the rec point array
135 fRecPoints = new TObjArray(400);
136 fNRecPoints = 0;
137
138 fIshunt = 0;
139 fGasMix = 0;
140
141 SetMarkerColor(kWhite);
142
143}
144
145//_____________________________________________________________________________
146AliTRD::~AliTRD()
147{
148 //
149 // TRD destructor
150 //
151
152 fIshunt = 0;
153
154 delete fGeometry;
155 delete fHits;
156 delete fRecPoints;
157
158}
159
160//_____________________________________________________________________________
161void AliTRD::AddRecPoint(Float_t *pos, Int_t *digits, Int_t det, Float_t amp)
162{
163 //
164 // Add a reconstructed point for the TRD
165 //
166
167 AliTRDrecPoint *RecPoint = new AliTRDrecPoint();
168 TVector3 posVec(pos[0],pos[1],pos[2]);
169 RecPoint->SetLocalPosition(posVec);
170 RecPoint->SetDetector(det);
171 RecPoint->SetEnergy(amp);
172 for (Int_t iDigit = 0; iDigit < 3; iDigit++) {
173 RecPoint->AddDigit(digits[iDigit]);
174 }
175
176 fRecPoints->Add(RecPoint);
177
178}
179
180//_____________________________________________________________________________
181void AliTRD::AddDigit(Int_t *digits, Int_t *amp)
182{
183 //
184 // Add a digit for the TRD
185 //
186
187 TClonesArray &ldigits = *fDigits;
188 new(ldigits[fNdigits++]) AliTRDdigit(kFALSE,digits,amp);
189
190}
191
192//_____________________________________________________________________________
193void AliTRD::AddHit(Int_t track, Int_t* det, Float_t *hits)
194{
195 //
196 // Add a hit for the TRD
197 //
198
199 TClonesArray &lhits = *fHits;
200 new(lhits[fNhits++]) AliTRDhit(fIshunt,track,det,hits);
201
202}
203
204//_____________________________________________________________________________
205void AliTRD::BuildGeometry()
206{
207 //
208 // Create the ROOT TNode geometry for the TRD
209 //
210
211 TNode *Node, *Top;
212 TPGON *pgon;
213 const Int_t kColorTRD = 46;
214
215 // Find the top node alice
216 Top = gAlice->GetGeometry()->GetNode("alice");
217
218 pgon = new TPGON("S_TRD","TRD","void",0,360,kNsect,4);
219 Float_t ff = TMath::Cos(kDegrad * 180 / kNsect);
220 Float_t rrmin = kRmin / ff;
221 Float_t rrmax = kRmax / ff;
222 pgon->DefineSection(0,-kZmax1,rrmax,rrmax);
223 pgon->DefineSection(1,-kZmax2,rrmin,rrmax);
224 pgon->DefineSection(2, kZmax2,rrmin,rrmax);
225 pgon->DefineSection(3, kZmax1,rrmax,rrmax);
226 Top->cd();
227 Node = new TNode("TRD","TRD","S_TRD",0,0,0,"");
228 Node->SetLineColor(kColorTRD);
229 fNodes->Add(Node);
230
231}
232
233//_____________________________________________________________________________
234void AliTRD::CreateGeometry()
235{
236 //
237 // Creates the volumes for the TRD chambers
238 //
239
240 // Check that FRAME is there otherwise we have no place where to put the TRD
241 AliModule* FRAME = gAlice->GetModule("FRAME");
242 if (!FRAME) {
243 printf(" The TRD needs the FRAME to be defined first\n");
244 return;
245 }
246
247 fGeometry->CreateGeometry(fIdtmed->GetArray() - 1299);
248
249}
250
251//_____________________________________________________________________________
252void AliTRD::CreateMaterials()
253{
254 //
255 // Create the materials for the TRD
256 // Origin Y.Foka
257 //
258
259 Int_t ISXFLD = gAlice->Field()->Integ();
260 Float_t SXMGMX = gAlice->Field()->Max();
261
262 // For polyethilene (CH2)
263 Float_t ape[2] = { 12., 1. };
264 Float_t zpe[2] = { 6., 1. };
265 Float_t wpe[2] = { 1., 2. };
266 Float_t dpe = 0.95;
267
268 // For mylar (C5H4O2)
269 Float_t amy[3] = { 12., 1., 16. };
270 Float_t zmy[3] = { 6., 1., 8. };
271 Float_t wmy[3] = { 5., 4., 2. };
272 Float_t dmy = 1.39;
273
274 // For CO2
275 Float_t aco[2] = { 12., 16. };
276 Float_t zco[2] = { 6., 8. };
277 Float_t wco[2] = { 1., 2. };
278 Float_t dco = 0.001977;
279
280 // For water
281 Float_t awa[2] = { 1., 16. };
282 Float_t zwa[2] = { 1., 8. };
283 Float_t wwa[2] = { 2., 1. };
284 Float_t dwa = 1.0;
285
286 // For isobutane (C4H10)
287 Float_t ais[2] = { 12., 1. };
288 Float_t zis[2] = { 6., 1. };
289 Float_t wis[2] = { 4., 10. };
290 Float_t dis = 0.00267;
291
292 // For Xe/CO2-gas-mixture
293 // Xe-content of the Xe/CO2-mixture (90% / 10%)
294 Float_t fxc = .90;
295 // Xe-content of the Xe/Isobutane-mixture (97% / 3%)
296 Float_t fxi = .97;
297 Float_t dxe = .005858;
298
299 // General tracking parameter
300 Float_t tmaxfd = -10.;
301 Float_t stemax = -1e10;
302 Float_t deemax = -0.1;
303 Float_t epsil = 1e-4;
304 Float_t stmin = -0.001;
305
306 Float_t absl, radl, d, buf[1];
307 Float_t agm[2], dgm, zgm[2], wgm[2];
308 Int_t nbuf;
309
310 //////////////////////////////////////////////////////////////////////////
311 // Define Materials
312 //////////////////////////////////////////////////////////////////////////
313
314 AliMaterial( 1, "Al $", 26.98, 13.0, 2.7 , 8.9 , 37.2);
315 AliMaterial( 2, "Air$", 14.61, 7.3, 0.001205, 30420.0 , 67500.0);
316 AliMaterial( 4, "Xe $", 131.29, 54.0, dxe , 1447.59, 0.0);
317 AliMaterial( 5, "Cu $", 63.54, 29.0, 8.96 , 1.43, 14.8);
318 AliMaterial( 6, "C $", 12.01, 6.0, 2.265 , 18.8 , 74.4);
319 AliMaterial(12, "G10$", 20.00, 10.0, 1.7 , 19.4 , 999.0);
320
321 // Mixtures
322 AliMixture(3, "Polyethilene$", ape, zpe, dpe, -2, wpe);
323 AliMixture(7, "Mylar$", amy, zmy, dmy, -3, wmy);
324 AliMixture(8, "CO2$", aco, zco, dco, -2, wco);
325 AliMixture(9, "Isobutane$", ais, zis, dis, -2, wis);
326 AliMixture(13,"Water$", awa, zwa, dwa, -2, wwa);
327
328 // Gas mixtures
329 Char_t namate[21];
330 // Xe/CO2-mixture
331 // Get properties of Xe
332 gMC->Gfmate((*fIdmate)[4], namate, agm[0], zgm[0], d, radl, absl, buf, nbuf);
333 // Get properties of CO2
334 gMC->Gfmate((*fIdmate)[8], namate, agm[1], zgm[1], d, radl, absl, buf, nbuf);
335 // Create gas mixture
336 wgm[0] = fxc;
337 wgm[1] = 1. - fxc;
338 dgm = wgm[0] * dxe + wgm[1] * dco;
339 AliMixture(10, "Gas mixture 1$", agm, zgm, dgm, 2, wgm);
340 // Xe/Isobutane-mixture
341 // Get properties of Xe
342 gMC->Gfmate((*fIdmate)[4], namate, agm[0], zgm[0], d, radl, absl, buf, nbuf);
343 // Get properties of Isobutane
344 gMC->Gfmate((*fIdmate)[9], namate, agm[1], zgm[1], d, radl, absl, buf, nbuf);
345 // Create gas mixture
346 wgm[0] = fxi;
347 wgm[1] = 1. - fxi;
348 dgm = wgm[0] * dxe + wgm[1] * dis;
349 AliMixture(11, "Gas mixture 2$", agm, zgm, dgm, 2, wgm);
350
351 //////////////////////////////////////////////////////////////////////////
352 // Tracking Media Parameters
353 //////////////////////////////////////////////////////////////////////////
354
355 // Al Frame
356 AliMedium(1, "Al Frame$", 1, 0, ISXFLD, SXMGMX
357 , tmaxfd, stemax, deemax, epsil, stmin);
358 // Air
359 AliMedium(2, "Air$", 2, 0, ISXFLD, SXMGMX
360 , tmaxfd, stemax, deemax, epsil, stmin);
361 // Polyethilene
362 AliMedium(3, "Radiator$", 3, 0, ISXFLD, SXMGMX
363 , tmaxfd, stemax, deemax, epsil, stmin);
364 // Xe
365 AliMedium(4, "Xe$", 4, 1, ISXFLD, SXMGMX
366 , tmaxfd, stemax, deemax, epsil, stmin);
367 // Cu pads
368 AliMedium(5, "Padplane$", 5, 1, ISXFLD, SXMGMX
369 , tmaxfd, stemax, deemax, epsil, stmin);
370 // Fee + cables
371 AliMedium(6, "Readout$", 1, 0, ISXFLD, SXMGMX
372 , tmaxfd, stemax, deemax, epsil, stmin);
373 // C frame
374 AliMedium(7, "C Frame$", 6, 0, ISXFLD, SXMGMX
375 , tmaxfd, stemax, deemax, epsil, stmin);
376 // Mylar foils
377 AliMedium(8, "Mylar$", 7, 0, ISXFLD, SXMGMX
378 , tmaxfd, stemax, deemax, epsil, stmin);
379 if (fGasMix == 1) {
380 // Gas-mixture (Xe/CO2)
381 AliMedium(9, "Gas-mix$", 10, 1, ISXFLD, SXMGMX
382 , tmaxfd, stemax, deemax, epsil, stmin);
383 }
384 else {
385 // Gas-mixture (Xe/Isobutane)
386 AliMedium(9, "Gas-mix$", 11, 1, ISXFLD, SXMGMX
387 , tmaxfd, stemax, deemax, epsil, stmin);
388 }
389 // Nomex-honeycomb (use carbon for the time being)
390 AliMedium(10, "Nomex$", 6, 0, ISXFLD, SXMGMX
391 , tmaxfd, stemax, deemax, epsil, stmin);
392 // Kapton foils (use Mylar for the time being)
393 AliMedium(11, "Kapton$", 7, 0, ISXFLD, SXMGMX
394 , tmaxfd, stemax, deemax, epsil, stmin);
395 // Gas-filling of the radiator
396 AliMedium(12, "CO2$", 8, 0, ISXFLD, SXMGMX
397 , tmaxfd, stemax, deemax, epsil, stmin);
398 // G10-plates
399 AliMedium(13, "G10-plates$",12, 0, ISXFLD, SXMGMX
400 , tmaxfd, stemax, deemax, epsil, stmin);
401 // Cooling water
402 AliMedium(14, "Water$", 13, 0, ISXFLD, SXMGMX
403 , tmaxfd, stemax, deemax, epsil, stmin);
404
405}
406
407//_____________________________________________________________________________
408void AliTRD::DrawModule()
409{
410 //
411 // Draw a shaded view of the Transition Radiation Detector version 0
412 //
413
414 // Set everything unseen
415 gMC->Gsatt("*" ,"SEEN",-1);
416
417 // Set ALIC mother transparent
418 gMC->Gsatt("ALIC","SEEN", 0);
419
420 // Set the volumes visible
421 if (fGeometry->IsVersion() == 0) {
422 gMC->Gsatt("B071","SEEN", 0);
423 gMC->Gsatt("B074","SEEN", 0);
424 gMC->Gsatt("B075","SEEN", 0);
425 gMC->Gsatt("B077","SEEN", 0);
426 gMC->Gsatt("BTR1","SEEN", 0);
427 gMC->Gsatt("BTR2","SEEN", 0);
428 gMC->Gsatt("BTR3","SEEN", 0);
429 gMC->Gsatt("TRD1","SEEN", 0);
430 gMC->Gsatt("TRD2","SEEN", 0);
431 gMC->Gsatt("TRD3","SEEN", 0);
432 }
433 else {
434 gMC->Gsatt("B071","SEEN", 0);
435 gMC->Gsatt("B074","SEEN", 0);
436 gMC->Gsatt("B075","SEEN", 0);
437 gMC->Gsatt("B077","SEEN", 0);
438 gMC->Gsatt("BTR1","SEEN", 0);
439 gMC->Gsatt("BTR2","SEEN", 0);
440 gMC->Gsatt("BTR3","SEEN", 0);
441 gMC->Gsatt("TRD1","SEEN", 0);
442 if (fGeometry->GetPHOShole())
443 gMC->Gsatt("TRD2","SEEN", 0);
444 if (fGeometry->GetRICHhole())
445 gMC->Gsatt("TRD3","SEEN", 0);
446 }
447 gMC->Gsatt("UCII","SEEN", 0);
448 gMC->Gsatt("UCIM","SEEN", 0);
449 gMC->Gsatt("UCIO","SEEN", 0);
450 gMC->Gsatt("UL02","SEEN", 1);
451 gMC->Gsatt("UL05","SEEN", 1);
452 gMC->Gsatt("UL06","SEEN", 1);
453
454 gMC->Gdopt("hide", "on");
455 gMC->Gdopt("shad", "on");
456 gMC->Gsatt("*", "fill", 7);
457 gMC->SetClipBox(".");
458 gMC->SetClipBox("*", 0, 2000, -2000, 2000, -2000, 2000);
459 gMC->DefaultRange();
460 gMC->Gdraw("alic", 40, 30, 0, 12, 9.4, .021, .021);
461 gMC->Gdhead(1111, "Transition Radiation Detector");
462 gMC->Gdman(18, 4, "MAN");
463
464}
465
466//_____________________________________________________________________________
467Int_t AliTRD::DistancetoPrimitive(Int_t , Int_t )
468{
469 //
470 // Distance between the mouse and the TRD detector on the screen
471 // Dummy routine
472
473 return 9999;
474
475}
476
477//_____________________________________________________________________________
478void AliTRD::Init()
479{
480 //
481 // Initialize the TRD detector after the geometry has been created
482 //
483
484 Int_t i;
485
486 printf("\n");
487 for (i = 0; i < 35; i++) printf("*");
488 printf(" TRD_INIT ");
489 for (i = 0; i < 35; i++) printf("*");
490 printf("\n");
491 printf("\n");
492
493 if (fGeometry->IsVersion() == 0) {
494 printf(" Geometry for spaceframe with holes initialized.\n\n");
495 }
496 else if (fGeometry->IsVersion() == 1) {
497 printf(" Geometry for spaceframe without holes initialized.\n");
498 if (fGeometry->GetPHOShole())
499 printf(" Leave space in front of PHOS free.\n");
500 if (fGeometry->GetRICHhole())
501 printf(" Leave space in front of RICH free.\n");
502 printf("\n");
503 }
504
505 if (fGasMix == 1)
506 printf(" Gas Mixture: 90%% Xe + 10%% CO2\n\n");
507 else
508 printf(" Gas Mixture: 97%% Xe + 3%% Isobutane\n\n");
509
510}
511
512//_____________________________________________________________________________
513void AliTRD::MakeBranch(Option_t* option)
514{
515 //
516 // Create Tree branches for the TRD digits and cluster.
517 //
518
519 Int_t buffersize = 4000;
520 Char_t branchname[15];
521
522 AliDetector::MakeBranch(option);
523
524 Char_t *R = strstr(option,"R");
525 sprintf(branchname,"%srecPoints",GetName());
526 if (fRecPoints && gAlice->TreeR() && R) {
527 gAlice->TreeR()->Branch(branchname,fRecPoints->IsA()->GetName()
528 ,&fRecPoints,buffersize,0);
529 printf("* AliTRD::MakeBranch * Making Branch %s for points in TreeR\n",branchname);
530 }
531
532}
533
534//_____________________________________________________________________________
535void AliTRD::ResetRecPoints()
536{
537 //
538 // Reset number of reconstructed points and the point array
539 //
540
541 fNRecPoints = 0;
542 if (fRecPoints) fRecPoints->Delete();
543
544}
545
546//_____________________________________________________________________________
547void AliTRD::SetTreeAddress()
548{
549 //
550 // Set the branch addresses for the trees.
551 //
552
553 Char_t branchname[15];
554
555 AliDetector::SetTreeAddress();
556
557 TBranch *branch;
558 TTree *treeR = gAlice->TreeR();
559
560 if (treeR) {
561 sprintf(branchname,"%srecPoints",GetName());
562 if (fRecPoints) {
563 branch = treeR->GetBranch(branchname);
564 if (branch) {
565 branch->SetAddress(&fRecPoints);
566 }
567 }
568 }
569
570}
571
572//_____________________________________________________________________________
573void AliTRD::SetGasMix(Int_t imix)
574{
575 //
576 // Defines the gas mixture (imix=0: Xe/Isobutane imix=1: Xe/CO2)
577 //
578
579 if ((imix < 0) || (imix > 1)) {
580 printf("Wrong input value: %d\n",imix);
581 printf("Use standard setting\n");
582 fGasMix = 0;
583 return;
584 }
585
586 fGasMix = imix;
587
588}
589