1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 Revision 1.16.2.2 2000/02/28 17:53:24 cblume
19 Introduce TRD geometry classes
21 Revision 1.16.2.1 2000/02/28 17:04:19 cblume
22 Include functions and data members for AliTRDrecPoint
24 Revision 1.16 2000/01/19 17:17:35 fca
25 Introducing a list of lists of hits -- more hits allowed for detector now
27 Revision 1.15 1999/11/02 17:04:25 fca
28 Small syntax change for HP compiler
30 Revision 1.14 1999/11/02 16:57:02 fca
31 Avoid non ansi warnings on HP compilers
33 Revision 1.13 1999/11/02 16:35:56 fca
34 New version of TRD introduced
36 Revision 1.12 1999/11/01 20:41:51 fca
37 Added protections against using the wrong version of FRAME
39 Revision 1.11 1999/09/29 09:24:34 fca
40 Introduction of the Copyright and cvs Log
44 ///////////////////////////////////////////////////////////////////////////////
46 // Transition Radiation Detector //
47 // This class contains the basic functions for the Transition Radiation //
48 // Detector, as well as the geometry. //
49 // Functions specific to one particular geometry are contained in the //
50 // derived classes. //
54 <img src="picts/AliTRDClass.gif">
59 ///////////////////////////////////////////////////////////////////////////////
70 #include "AliTRDdigitizer.h"
71 #include "AliTRDclusterizer.h"
72 #include "AliTRDgeometryHole.h"
73 #include "AliTRDgeometryFull.h"
74 #include "AliTRDrecPoint.h"
78 //_____________________________________________________________________________
82 // Default constructor
97 //_____________________________________________________________________________
98 AliTRD::AliTRD(const char *name, const char *title)
99 : AliDetector(name,title)
102 // Standard constructor for the TRD
105 // Check that FRAME is there otherwise we have no place where to
107 AliModule* FRAME=gAlice->GetModule("FRAME");
109 Error("Ctor","TRD needs FRAME to be present\n");
113 // Define the TRD geometry according to the FRAME geometry
114 if (FRAME->IsVersion() == 0) {
115 // Geometry with hole
116 fGeometry = new AliTRDgeometryHole();
118 else if (FRAME->IsVersion() == 1) {
119 // Geometry without hole
120 fGeometry = new AliTRDgeometryFull();
123 Error("Ctor","Could not find valid FRAME version\n");
127 // Allocate the hit array
128 fHits = new TClonesArray("AliTRDhit" , 405);
129 gAlice->AddHitList(fHits);
131 // Allocate the digits array
134 // Allocate the rec point array
135 fRecPoints = new TClonesArray("AliTRDrecPoint", 400);
141 SetMarkerColor(kWhite);
145 //_____________________________________________________________________________
160 //_____________________________________________________________________________
161 void AliTRD::AddRecPoint(Float_t *pos, Int_t *digits, Int_t det, Float_t amp)
164 // Add a reconstructed point for the TRD
167 TClonesArray &lRecPoints = *fRecPoints;
168 AliTRDrecPoint *RecPoint = new(lRecPoints[fNRecPoints++]) AliTRDrecPoint();
169 TVector3 posVec(pos[0],pos[1],pos[2]);
170 RecPoint->SetLocalPosition(posVec);
171 RecPoint->SetDetector(det);
172 RecPoint->SetAmplitude(amp);
173 for (Int_t iDigit = 0; iDigit < 3; iDigit++) {
174 RecPoint->AddDigit(digits[iDigit]);
179 //_____________________________________________________________________________
180 void AliTRD::AddDigit(Int_t *digits)
183 // Add a digit for the TRD
186 TClonesArray &ldigits = *fDigits;
187 new(ldigits[fNdigits++]) AliTRDdigit(digits);
191 //_____________________________________________________________________________
192 void AliTRD::AddHit(Int_t track, Int_t det, Float_t *hits)
195 // Add a hit for the TRD
198 TClonesArray &lhits = *fHits;
199 new(lhits[fNhits++]) AliTRDhit(fIshunt,track,det,hits);
203 //_____________________________________________________________________________
204 void AliTRD::BuildGeometry()
207 // Create the ROOT TNode geometry for the TRD
212 const Int_t kColorTRD = 46;
214 // Find the top node alice
215 Top = gAlice->GetGeometry()->GetNode("alice");
217 pgon = new TPGON("S_TRD","TRD","void",0,360,kNsect,4);
218 Float_t ff = TMath::Cos(kDegrad * 180 / kNsect);
219 Float_t rrmin = kRmin / ff;
220 Float_t rrmax = kRmax / ff;
221 pgon->DefineSection(0,-kZmax1,rrmax,rrmax);
222 pgon->DefineSection(1,-kZmax2,rrmin,rrmax);
223 pgon->DefineSection(2, kZmax2,rrmin,rrmax);
224 pgon->DefineSection(3, kZmax1,rrmax,rrmax);
226 Node = new TNode("TRD","TRD","S_TRD",0,0,0,"");
227 Node->SetLineColor(kColorTRD);
232 //_____________________________________________________________________________
233 void AliTRD::CreateGeometry()
236 // Creates the volumes for the TRD chambers
239 // Check that FRAME is there otherwise we have no place where to put the TRD
240 AliModule* FRAME = gAlice->GetModule("FRAME");
242 printf(" The TRD needs the FRAME to be defined first\n");
246 fGeometry->CreateGeometry(fIdtmed->GetArray() - 1299);
250 //_____________________________________________________________________________
251 void AliTRD::CreateMaterials()
254 // Create the materials for the TRD
258 Int_t ISXFLD = gAlice->Field()->Integ();
259 Float_t SXMGMX = gAlice->Field()->Max();
261 // For polyethilene (CH2)
262 Float_t ape[2] = { 12., 1. };
263 Float_t zpe[2] = { 6., 1. };
264 Float_t wpe[2] = { 1., 2. };
267 // For mylar (C5H4O2)
268 Float_t amy[3] = { 12., 1., 16. };
269 Float_t zmy[3] = { 6., 1., 8. };
270 Float_t wmy[3] = { 5., 4., 2. };
274 Float_t aco[2] = { 12., 16. };
275 Float_t zco[2] = { 6., 8. };
276 Float_t wco[2] = { 1., 2. };
277 Float_t dco = 0.001977;
280 Float_t awa[2] = { 1., 16. };
281 Float_t zwa[2] = { 1., 8. };
282 Float_t wwa[2] = { 2., 1. };
285 // For isobutane (C4H10)
286 Float_t ais[2] = { 12., 1. };
287 Float_t zis[2] = { 6., 1. };
288 Float_t wis[2] = { 4., 10. };
289 Float_t dis = 0.00267;
291 // For Xe/CO2-gas-mixture
292 // Xe-content of the Xe/CO2-mixture (90% / 10%)
294 // Xe-content of the Xe/Isobutane-mixture (97% / 3%)
296 Float_t dxe = .005858;
298 // General tracking parameter
299 Float_t tmaxfd = -10.;
300 Float_t stemax = -1e10;
301 Float_t deemax = -0.1;
302 Float_t epsil = 1e-4;
303 Float_t stmin = -0.001;
305 Float_t absl, radl, d, buf[1];
306 Float_t agm[2], dgm, zgm[2], wgm[2];
309 //////////////////////////////////////////////////////////////////////////
311 //////////////////////////////////////////////////////////////////////////
313 AliMaterial( 1, "Al $", 26.98, 13.0, 2.7 , 8.9 , 37.2);
314 AliMaterial( 2, "Air$", 14.61, 7.3, 0.001205, 30420.0 , 67500.0);
315 AliMaterial( 4, "Xe $", 131.29, 54.0, dxe , 1447.59, 0.0);
316 AliMaterial( 5, "Cu $", 63.54, 29.0, 8.96 , 1.43, 14.8);
317 AliMaterial( 6, "C $", 12.01, 6.0, 2.265 , 18.8 , 74.4);
318 AliMaterial(12, "G10$", 20.00, 10.0, 1.7 , 19.4 , 999.0);
321 AliMixture(3, "Polyethilene$", ape, zpe, dpe, -2, wpe);
322 AliMixture(7, "Mylar$", amy, zmy, dmy, -3, wmy);
323 AliMixture(8, "CO2$", aco, zco, dco, -2, wco);
324 AliMixture(9, "Isobutane$", ais, zis, dis, -2, wis);
325 AliMixture(13,"Water$", awa, zwa, dwa, -2, wwa);
330 // Get properties of Xe
331 gMC->Gfmate((*fIdmate)[4], namate, agm[0], zgm[0], d, radl, absl, buf, nbuf);
332 // Get properties of CO2
333 gMC->Gfmate((*fIdmate)[8], namate, agm[1], zgm[1], d, radl, absl, buf, nbuf);
334 // Create gas mixture
337 dgm = wgm[0] * dxe + wgm[1] * dco;
338 AliMixture(10, "Gas mixture 1$", agm, zgm, dgm, 2, wgm);
339 // Xe/Isobutane-mixture
340 // Get properties of Xe
341 gMC->Gfmate((*fIdmate)[4], namate, agm[0], zgm[0], d, radl, absl, buf, nbuf);
342 // Get properties of Isobutane
343 gMC->Gfmate((*fIdmate)[9], namate, agm[1], zgm[1], d, radl, absl, buf, nbuf);
344 // Create gas mixture
347 dgm = wgm[0] * dxe + wgm[1] * dis;
348 AliMixture(11, "Gas mixture 2$", agm, zgm, dgm, 2, wgm);
350 //////////////////////////////////////////////////////////////////////////
351 // Tracking Media Parameters
352 //////////////////////////////////////////////////////////////////////////
355 AliMedium(1, "Al Frame$", 1, 0, ISXFLD, SXMGMX
356 , tmaxfd, stemax, deemax, epsil, stmin);
358 AliMedium(2, "Air$", 2, 0, ISXFLD, SXMGMX
359 , tmaxfd, stemax, deemax, epsil, stmin);
361 AliMedium(3, "Radiator$", 3, 0, ISXFLD, SXMGMX
362 , tmaxfd, stemax, deemax, epsil, stmin);
364 AliMedium(4, "Xe$", 4, 1, ISXFLD, SXMGMX
365 , tmaxfd, stemax, deemax, epsil, stmin);
367 AliMedium(5, "Padplane$", 5, 1, ISXFLD, SXMGMX
368 , tmaxfd, stemax, deemax, epsil, stmin);
370 AliMedium(6, "Readout$", 1, 0, ISXFLD, SXMGMX
371 , tmaxfd, stemax, deemax, epsil, stmin);
373 AliMedium(7, "C Frame$", 6, 0, ISXFLD, SXMGMX
374 , tmaxfd, stemax, deemax, epsil, stmin);
376 AliMedium(8, "Mylar$", 7, 0, ISXFLD, SXMGMX
377 , tmaxfd, stemax, deemax, epsil, stmin);
379 // Gas-mixture (Xe/CO2)
380 AliMedium(9, "Gas-mix$", 10, 1, ISXFLD, SXMGMX
381 , tmaxfd, stemax, deemax, epsil, stmin);
384 // Gas-mixture (Xe/Isobutane)
385 AliMedium(9, "Gas-mix$", 11, 1, ISXFLD, SXMGMX
386 , tmaxfd, stemax, deemax, epsil, stmin);
388 // Nomex-honeycomb (use carbon for the time being)
389 AliMedium(10, "Nomex$", 6, 0, ISXFLD, SXMGMX
390 , tmaxfd, stemax, deemax, epsil, stmin);
391 // Kapton foils (use Mylar for the time being)
392 AliMedium(11, "Kapton$", 7, 0, ISXFLD, SXMGMX
393 , tmaxfd, stemax, deemax, epsil, stmin);
394 // Gas-filling of the radiator
395 AliMedium(12, "CO2$", 8, 0, ISXFLD, SXMGMX
396 , tmaxfd, stemax, deemax, epsil, stmin);
398 AliMedium(13, "G10-plates$",12, 0, ISXFLD, SXMGMX
399 , tmaxfd, stemax, deemax, epsil, stmin);
401 AliMedium(14, "Water$", 13, 0, ISXFLD, SXMGMX
402 , tmaxfd, stemax, deemax, epsil, stmin);
406 //_____________________________________________________________________________
407 void AliTRD::DrawModule()
410 // Draw a shaded view of the Transition Radiation Detector version 0
413 // Set everything unseen
414 gMC->Gsatt("*" ,"SEEN",-1);
416 // Set ALIC mother transparent
417 gMC->Gsatt("ALIC","SEEN", 0);
419 // Set the volumes visible
420 if (fGeometry->IsVersion() == 0) {
421 gMC->Gsatt("B071","SEEN", 0);
422 gMC->Gsatt("B074","SEEN", 0);
423 gMC->Gsatt("B075","SEEN", 0);
424 gMC->Gsatt("B077","SEEN", 0);
425 gMC->Gsatt("BTR1","SEEN", 0);
426 gMC->Gsatt("BTR2","SEEN", 0);
427 gMC->Gsatt("BTR3","SEEN", 0);
428 gMC->Gsatt("TRD1","SEEN", 0);
429 gMC->Gsatt("TRD2","SEEN", 0);
430 gMC->Gsatt("TRD3","SEEN", 0);
433 gMC->Gsatt("B071","SEEN", 0);
434 gMC->Gsatt("B074","SEEN", 0);
435 gMC->Gsatt("B075","SEEN", 0);
436 gMC->Gsatt("B077","SEEN", 0);
437 gMC->Gsatt("BTR1","SEEN", 0);
438 gMC->Gsatt("BTR2","SEEN", 0);
439 gMC->Gsatt("BTR3","SEEN", 0);
440 gMC->Gsatt("TRD1","SEEN", 0);
442 gMC->Gsatt("UCII","SEEN", 0);
443 gMC->Gsatt("UCIM","SEEN", 0);
444 gMC->Gsatt("UCIO","SEEN", 0);
445 gMC->Gsatt("UL02","SEEN", 1);
446 gMC->Gsatt("UL05","SEEN", 1);
447 gMC->Gsatt("UL06","SEEN", 1);
449 gMC->Gdopt("hide", "on");
450 gMC->Gdopt("shad", "on");
451 gMC->Gsatt("*", "fill", 7);
452 gMC->SetClipBox(".");
453 gMC->SetClipBox("*", 0, 2000, -2000, 2000, -2000, 2000);
455 gMC->Gdraw("alic", 40, 30, 0, 12, 9.4, .021, .021);
456 gMC->Gdhead(1111, "Transition Radiation Detector");
457 gMC->Gdman(18, 4, "MAN");
461 //_____________________________________________________________________________
462 Int_t AliTRD::DistancetoPrimitive(Int_t , Int_t )
465 // Distance between the mouse and the TRD detector on the screen
472 //_____________________________________________________________________________
476 // Initialize the TRD detector after the geometry has been created
482 for (i = 0; i < 35; i++) printf("*");
483 printf(" TRD_INIT ");
484 for (i = 0; i < 35; i++) printf("*");
488 if (fGeometry->IsVersion() == 0) {
489 printf(" Geometry with holes initialized.\n\n");
491 else if (fGeometry->IsVersion() == 1) {
492 printf(" Geometry without holes initialized.\n\n");
496 printf(" Gas Mixture: 90%% Xe + 10%% CO2\n\n");
498 printf(" Gas Mixture: 97%% Xe + 3%% Isobutane\n\n");
502 //_____________________________________________________________________________
503 void AliTRD::MakeBranch(Option_t* option)
506 // Create Tree branches for the TRD digits and cluster.
509 Int_t buffersize = 4000;
510 Char_t branchname[15];
512 AliDetector::MakeBranch(option);
514 //Char_t *D = strstr(option,"D");
515 //sprintf(branchname,"%s",GetName());
516 //if (fDigits && gAlice->TreeD() && D) {
517 // gAlice->TreeD()->Branch(branchname,&fDigits, buffersize);
518 // printf("* AliTRD::MakeBranch * Making Branch %s for digits in TreeD\n",branchname);
521 Char_t *R = strstr(option,"R");
522 sprintf(branchname,"%srecPoints",GetName());
523 if (fRecPoints && gAlice->TreeR() && R) {
524 gAlice->TreeR()->Branch(branchname,&fRecPoints,buffersize);
525 printf("* AliTRD::MakeBranch * Making Branch %s for points in TreeR\n",branchname);
530 //_____________________________________________________________________________
531 void AliTRD::ResetRecPoints()
534 // Reset number of reconstructed points and the point array
538 if (fRecPoints) fRecPoints->Clear();
542 //_____________________________________________________________________________
543 void AliTRD::SetTreeAddress()
546 // Set the branch addresses for the trees.
549 Char_t branchname[15];
551 AliDetector::SetTreeAddress();
554 TTree *treeR = gAlice->TreeR();
557 sprintf(branchname,"%srecPoints",GetName());
559 branch = treeR->GetBranch(branchname);
561 branch->SetAddress(&fRecPoints);
568 //_____________________________________________________________________________
569 void AliTRD::SetGasMix(Int_t imix)
572 // Defines the gas mixture (imix=0: Xe/Isobutane imix=1: Xe/CO2)
575 if ((imix < 0) || (imix > 1)) {
576 printf("Wrong input value: %d\n",imix);
577 printf("Use standard setting\n");
586 //______________________________________________________________________________
587 void AliTRD::Streamer(TBuffer &R__b)
590 // Stream an object of class AliTRD.
593 if (R__b.IsReading()) {
594 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
595 AliDetector::Streamer(R__b);
598 // Stream the pointers but not the TClonesArray
599 R__b >> fRecPoints; // diff
602 R__b.WriteVersion(AliTRD::IsA());
603 AliDetector::Streamer(R__b);
606 // Stream the pointers but not the TClonesArrays
607 R__b << fRecPoints; // diff
614 //_____________________________________________________________________________
615 AliTRDhit::AliTRDhit(Int_t shunt, Int_t track, Int_t det, Float_t *hits)
616 :AliHit(shunt, track)
622 // Store volume hierarchy
625 // Store position and charge