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 1.9 2000/05/31 08:19:38 jbarbosa
19 Fixed bug in StepManager
21 Revision 1.8 2000/05/26 17:30:08 jbarbosa
22 Cerenkov angle now stored within cerenkov data structure.
24 Revision 1.7 2000/05/18 10:31:36 jbarbosa
25 Fixed positioning of spacers inside freon.
26 Fixed positioning of proximity gap
28 Fixed cut on neutral particles in the StepManager.
30 Revision 1.6 2000/04/28 11:51:58 morsch
31 Dimensions of arrays hits and Ckov_data corrected.
33 Revision 1.5 2000/04/19 13:28:46 morsch
34 Major changes in geometry (parametrised), materials (updated) and
35 step manager (diagnostics) (JB, AM)
41 /////////////////////////////////////////////////////////////
42 // Manager and hits classes for set: RICH default version //
43 /////////////////////////////////////////////////////////////
49 #include "AliRICHv0.h"
50 #include "AliRICHSegResV0.h"
54 #include "AliCallf77.h"
61 //___________________________________________
62 AliRICHv0::AliRICHv0() : AliRICH()
67 //___________________________________________
68 AliRICHv0::AliRICHv0(const char *name, const char *title)
73 // Default Segmentation
74 AliRICHSegmentationV0* SegmentationV0 = new AliRICHSegmentationV0;
76 // Segmentation parameters
77 SegmentationV0->SetPadSize(0.84,0.80);
78 SegmentationV0->SetDAnod(0.84/2);
80 // Geometry parameters
81 AliRICHGeometry* GeometryV0 = new AliRICHGeometryV0;
82 GeometryV0->SetGapThickness(8);
83 GeometryV0->SetProximityGapThickness(.4);
84 GeometryV0->SetQuartzLength(131);
85 GeometryV0->SetQuartzWidth(126.2);
86 GeometryV0->SetQuartzThickness(.5);
87 GeometryV0->SetOuterFreonLength(131);
88 GeometryV0->SetOuterFreonWidth(40.3);
89 GeometryV0->SetInnerFreonLength(131);
90 GeometryV0->SetInnerFreonWidth(40.3);
91 GeometryV0->SetFreonThickness(1);
93 // Response parameters
94 AliRICHResponseV0* Rresponse0 = new AliRICHResponseV0;
95 Rresponse0->SetSigmaIntegration(5.);
96 Rresponse0->SetChargeSlope(40.);
97 Rresponse0->SetChargeSpread(0.18, 0.18);
98 Rresponse0->SetMaxAdc(1024);
99 Rresponse0->SetAlphaFeedback(0.05);
100 Rresponse0->SetEIonisation(26.e-9);
101 Rresponse0->SetSqrtKx3(0.77459667);
102 Rresponse0->SetKx2(0.962);
103 Rresponse0->SetKx4(0.379);
104 Rresponse0->SetSqrtKy3(0.77459667);
105 Rresponse0->SetKy2(0.962);
106 Rresponse0->SetKy4(0.379);
107 Rresponse0->SetPitch(0.25);
110 // AliRICH *RICH = (AliRICH *) gAlice->GetDetector("RICH");
115 fChambers = new TObjArray(7);
116 for (Int_t i=0; i<7; i++) {
118 (*fChambers)[i] = new AliRICHChamber();
122 for (Int_t i=0; i<7; i++) {
123 SetGeometryModel(i,GeometryV0);
124 SetSegmentationModel(i, SegmentationV0);
125 SetResponseModel(i, Rresponse0);
131 //___________________________________________
132 void AliRICHv0::CreateGeometry()
135 // Create the geometry for RICH version 1
137 // Modified by: N. Colonna (INFN - BARI, Nicola.Colonna@ba.infn.it)
138 // R.A. Fini (INFN - BARI, Rosanna.Fini@ba.infn.it)
139 // R.A. Loconsole (Bari University, loco@riscom.ba.infn.it)
143 <img src="picts/AliRICHv1.gif">
148 <img src="picts/AliRICHv1Tree.gif">
152 AliRICH *RICH = (AliRICH *) gAlice->GetDetector("RICH");
153 AliRICHSegmentation* segmentation;
154 AliRICHGeometry* geometry;
155 AliRICHChamber* iChamber;
157 iChamber = &(RICH->Chamber(0));
158 segmentation=iChamber->GetSegmentationModel(0);
159 geometry=iChamber->GetGeometryModel();
162 distance = geometry->GetFreonThickness()/2 + geometry->GetQuartzThickness() + geometry->GetGapThickness();
163 geometry->SetRadiatorToPads(distance);
166 Int_t *idtmed = fIdtmed->GetArray()-999;
173 // --- Define the RICH detector
174 // External aluminium box
176 par[1] = 11.5; //Original Settings
181 gMC->Gsvolu("RICH", "BOX ", idtmed[1009], par, 3);
183 // Sensitive part of the whole RICH
185 par[1] = 11.5; //Original Settings
190 gMC->Gsvolu("SRIC", "BOX ", idtmed[1000], par, 3);
194 par[1] = .188; //Original Settings
199 gMC->Gsvolu("HONE", "BOX ", idtmed[1001], par, 3);
203 par[1] = .025; //Original Settings
208 gMC->Gsvolu("ALUM", "BOX ", idtmed[1009], par, 3);
211 par[0] = geometry->GetQuartzWidth()/2;
212 par[1] = geometry->GetQuartzThickness()/2;
213 par[2] = geometry->GetQuartzLength()/2;
215 par[1] = .25; //Original Settings
217 /*par[0] = geometry->GetQuartzWidth()/2;
218 par[1] = geometry->GetQuartzThickness()/2;
219 par[2] = geometry->GetQuartzLength()/2;*/
220 //printf("\n\n\n\n\n\n\n\\n\n\n\n Gap Thickness: %f %f %f\n\n\n\n\n\n\n\n\n\n\n\n\n\n",par[0],par[1],par[2]);
221 gMC->Gsvolu("QUAR", "BOX ", idtmed[1002], par, 3);
223 // Spacers (cylinders)
226 par[2] = geometry->GetFreonThickness()/2;
227 gMC->Gsvolu("SPAC", "TUBE", idtmed[1002], par, 3);
231 par[1] = .2; //Original Settings
236 gMC->Gsvolu("OQUA", "BOX ", idtmed[1007], par, 3);
238 // Frame of opaque quartz
239 par[0] = geometry->GetOuterFreonWidth()/2;
240 par[1] = geometry->GetFreonThickness()/2;
241 par[2] = geometry->GetOuterFreonLength()/2 + 1;
243 par[1] = .5; //Original Settings
248 gMC->Gsvolu("OQF1", "BOX ", idtmed[1007], par, 3);
250 par[0] = geometry->GetInnerFreonWidth()/2;
251 par[1] = geometry->GetFreonThickness()/2;
252 par[2] = geometry->GetInnerFreonLength()/2 + 1;
253 gMC->Gsvolu("OQF2", "BOX ", idtmed[1007], par, 3);
255 // Little bar of opaque quartz
257 par[1] = geometry->GetQuartzThickness()/2;
258 par[2] = geometry->GetInnerFreonLength()/2 - 2.4;
260 par[1] = .25; //Original Settings
265 gMC->Gsvolu("BARR", "BOX ", idtmed[1007], par, 3);
268 par[0] = geometry->GetOuterFreonWidth()/2;
269 par[1] = geometry->GetFreonThickness()/2;
270 par[2] = geometry->GetOuterFreonLength()/2;
272 par[1] = .5; //Original Settings
277 gMC->Gsvolu("FRE1", "BOX ", idtmed[1003], par, 3);
279 par[0] = geometry->GetInnerFreonWidth()/2;
280 par[1] = geometry->GetFreonThickness()/2;
281 par[2] = geometry->GetInnerFreonLength()/2;
282 gMC->Gsvolu("FRE2", "BOX ", idtmed[1003], par, 3);
286 par[1] = geometry->GetGapThickness()/2;
287 //printf("\n\n\n\n\n\n\n\\n\n\n\n Gap Thickness: %f\n\n\n\n\n\n\n\n\n\n\n\n\n\n",par[1]);
289 gMC->Gsvolu("META", "BOX ", idtmed[1004], par, 3);
293 par[1] = geometry->GetProximityGapThickness()/2;
294 //printf("\n\n\n\n\n\n\n\\n\n\n\n Gap Thickness: %f\n\n\n\n\n\n\n\n\n\n\n\n\n\n",par[1]);
296 gMC->Gsvolu("GAP ", "BOX ", idtmed[1008], par, 3);
302 gMC->Gsvolu("CSI ", "BOX ", idtmed[1005], par, 3);
308 gMC->Gsvolu("GRID", "TUBE", idtmed[1006], par, 3);
310 // --- Places the detectors defined with GSVOLU
311 // Place material inside RICH
312 gMC->Gspos("SRIC", 1, "RICH", 0., 0., 0., 0, "ONLY");
314 gMC->Gspos("ALUM", 1, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .4 -.05 - .376 -.025, 0., 0, "ONLY");
315 gMC->Gspos("HONE", 1, "SRIC", 0., 1.276- geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .4 -.05 - .188, 0., 0, "ONLY");
316 gMC->Gspos("ALUM", 2, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .4 - .025, 0., 0, "ONLY");
317 gMC->Gspos("OQUA", 1, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .2, 0., 0, "ONLY");
319 AliMatrix(idrotm[1019], 0., 0., 90., 0., 90., 90.);
321 Int_t nspacers = (Int_t)(TMath::Abs(geometry->GetInnerFreonLength()/14.4));
322 //printf("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n Spacers:%d\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n",nspacers);
324 //printf("Nspacers: %d", nspacers);
326 //for (i = 1; i <= 9; ++i) {
327 //zs = (5 - i) * 14.4; //Original settings
328 for (i = 0; i < nspacers; i++) {
329 zs = (TMath::Abs(nspacers/2) - i) * 14.4;
330 gMC->Gspos("SPAC", i, "FRE1", 6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
331 //gMC->Gspos("SPAC", i, "FRE1", zs, 0., 6.7, idrotm[1019], "ONLY");
333 //for (i = 10; i <= 18; ++i) {
334 //zs = (14 - i) * 14.4; //Original settings
335 for (i = nspacers; i < nspacers*2; ++i) {
336 zs = (nspacers + TMath::Abs(nspacers/2) - i) * 14.4;
337 gMC->Gspos("SPAC", i, "FRE1", -6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
338 //gMC->Gspos("SPAC", i, "FRE1", zs, 0., -6.7, idrotm[1019], "ONLY");
341 //for (i = 1; i <= 9; ++i) {
342 //zs = (5 - i) * 14.4; //Original settings
343 for (i = 0; i < nspacers; i++) {
344 zs = (TMath::Abs(nspacers/2) - i) * 14.4;
345 gMC->Gspos("SPAC", i, "FRE2", 6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
346 //gMC->Gspos("SPAC", i, "FRE2", zs, 0., 6.7, idrotm[1019], "ONLY");
348 //for (i = 10; i <= 18; ++i) {
349 //zs = (5 - i) * 14.4; //Original settings
350 for (i = nspacers; i < nspacers*2; ++i) {
351 zs = (nspacers + TMath::Abs(nspacers/2) - i) * 14.4;
352 gMC->Gspos("SPAC", i, "FRE2", -6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
353 //gMC->Gspos("SPAC", i, "FRE2", zs, 0., -6.7, idrotm[1019], "ONLY");
356 /*gMC->Gspos("FRE1", 1, "OQF1", 0., 0., 0., 0, "ONLY");
357 gMC->Gspos("FRE2", 1, "OQF2", 0., 0., 0., 0, "ONLY");
358 gMC->Gspos("OQF1", 1, "SRIC", 31.3, -4.724, 41.3, 0, "ONLY");
359 gMC->Gspos("OQF2", 2, "SRIC", 0., -4.724, 0., 0, "ONLY");
360 gMC->Gspos("OQF1", 3, "SRIC", -31.3, -4.724, -41.3, 0, "ONLY");
361 gMC->Gspos("BARR", 1, "QUAR", -21.65, 0., 0., 0, "ONLY"); //Original settings
362 gMC->Gspos("BARR", 2, "QUAR", 21.65, 0., 0., 0, "ONLY"); //Original settings
363 gMC->Gspos("QUAR", 1, "SRIC", 0., -3.974, 0., 0, "ONLY");
364 gMC->Gspos("GAP ", 1, "META", 0., 4.8, 0., 0, "ONLY");
365 gMC->Gspos("META", 1, "SRIC", 0., 1.276, 0., 0, "ONLY");
366 gMC->Gspos("CSI ", 1, "SRIC", 0., 6.526, 0., 0, "ONLY");*/
369 gMC->Gspos("FRE1", 1, "OQF1", 0., 0., 0., 0, "ONLY");
370 gMC->Gspos("FRE2", 1, "OQF2", 0., 0., 0., 0, "ONLY");
371 gMC->Gspos("OQF1", 1, "SRIC", geometry->GetOuterFreonWidth()/2 + geometry->GetInnerFreonWidth()/2, 1.276 - geometry->GetGapThickness()/2- geometry->GetQuartzThickness() -geometry->GetFreonThickness()/2, 0., 0, "ONLY"); //Original settings (31.3)
372 gMC->Gspos("OQF2", 2, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()/2, 0., 0, "ONLY"); //Original settings
373 gMC->Gspos("OQF1", 3, "SRIC", - (geometry->GetOuterFreonWidth()/2 + geometry->GetInnerFreonWidth()/2), 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()/2, 0., 0, "ONLY"); //Original settings (-31.3)
374 gMC->Gspos("BARR", 1, "QUAR", -21.65, 0., 0., 0, "ONLY"); //Original settings
375 gMC->Gspos("BARR", 2, "QUAR", 21.65, 0., 0., 0, "ONLY"); //Original settings
376 gMC->Gspos("QUAR", 1, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness()/2, 0., 0, "ONLY");
377 gMC->Gspos("GAP ", 1, "META", 0., geometry->GetGapThickness()/2 - geometry->GetProximityGapThickness()/2 - 0.0001, 0., 0, "ONLY");
378 gMC->Gspos("META", 1, "SRIC", 0., 1.276, 0., 0, "ONLY");
379 gMC->Gspos("CSI ", 1, "SRIC", 0., 1.276 + geometry->GetGapThickness()/2 + .25, 0., 0, "ONLY");
381 //printf("Position of the gap: %f to %f\n", 1.276 + geometry->GetGapThickness()/2 - geometry->GetProximityGapThickness()/2 - .2, 1.276 + geometry->GetGapThickness()/2 - geometry->GetProximityGapThickness()/2 + .2);
383 // Place RICH inside ALICE apparatus
385 AliMatrix(idrotm[1000], 90., 0., 70.69, 90., 19.31, -90.);
386 AliMatrix(idrotm[1001], 90., -20., 90., 70., 0., 0.);
387 AliMatrix(idrotm[1002], 90., 0., 90., 90., 0., 0.);
388 AliMatrix(idrotm[1003], 90., 20., 90., 110., 0., 0.);
389 AliMatrix(idrotm[1004], 90., 340., 108.2, 70., 18.2, 70.);
390 AliMatrix(idrotm[1005], 90., 0., 109.31, 90., 19.31, 90.);
391 AliMatrix(idrotm[1006], 90., 20., 108.2, 110., 18.2, 110.);
393 gMC->Gspos("RICH", 1, "ALIC", 0., 471.9, 165.26, idrotm[1000], "ONLY");
394 gMC->Gspos("RICH", 2, "ALIC", 171., 470., 0., idrotm[1001], "ONLY");
395 gMC->Gspos("RICH", 3, "ALIC", 0., 500., 0., idrotm[1002], "ONLY");
396 gMC->Gspos("RICH", 4, "ALIC", -171., 470., 0., idrotm[1003], "ONLY");
397 gMC->Gspos("RICH", 5, "ALIC", 161.4, 443.4, -165.3, idrotm[1004], "ONLY");
398 gMC->Gspos("RICH", 6, "ALIC", 0., 471.9, -165.3, idrotm[1005], "ONLY");
399 gMC->Gspos("RICH", 7, "ALIC", -161.4, 443.4, -165.3, idrotm[1006], "ONLY");
404 //___________________________________________
405 void AliRICHv0::CreateMaterials()
408 // *** DEFINITION OF AVAILABLE RICH MATERIALS ***
409 // ORIGIN : NICK VAN EIJNDHOVEN
410 // Modified by: N. Colonna (INFN - BARI, Nicola.Colonna@ba.infn.it)
411 // R.A. Fini (INFN - BARI, Rosanna.Fini@ba.infn.it)
412 // R.A. Loconsole (Bari University, loco@riscom.ba.infn.it)
414 Int_t ISXFLD = gAlice->Field()->Integ();
415 Float_t SXMGMX = gAlice->Field()->Max();
418 /************************************Antonnelo's Values (14-vectors)*****************************************/
420 Float_t ppckov[14] = { 5.63e-9,5.77e-9,5.9e-9,6.05e-9,6.2e-9,6.36e-9,6.52e-9,
421 6.7e-9,6.88e-9,7.08e-9,7.3e-9,7.51e-9,7.74e-9,8e-9 };
422 Float_t rindex_quarz[14] = { 1.528309,1.533333,
423 1.538243,1.544223,1.550568,1.55777,
424 1.565463,1.574765,1.584831,1.597027,
425 1.611858,1.6277,1.6472,1.6724 };
426 Float_t rindex_quarzo[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
427 Float_t rindex_methane[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
428 Float_t rindex_gri[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
429 Float_t absco_freon[14] = { 179.0987,179.0987,
430 179.0987,179.0987,179.0987,142.92,56.65,13.95,10.43,7.07,2.03,.5773,.33496,0. };
431 //Float_t absco_freon[14] = { 1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,
432 // 1e-5,1e-5,1e-5,1e-5,1e-5 };
433 Float_t absco_quarz[14] = { 64.035,39.98,35.665,31.262,27.527,22.815,21.04,17.52,
434 14.177,9.282,4.0925,1.149,.3627,.10857 };
435 Float_t absco_quarzo[14] = { 1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,
436 1e-5,1e-5,1e-5,1e-5,1e-5 };
437 Float_t absco_csi[14] = { 1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,
438 1e-4,1e-4,1e-4,1e-4 };
439 Float_t absco_methane[14] = { 1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,
441 Float_t absco_gri[14] = { 1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,
442 1e-4,1e-4,1e-4,1e-4 };
443 Float_t effic_all[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
444 Float_t effic_csi[14] = { 6e-4,.005,.0075,.01125,.045,.117,.135,.16575,
445 .17425,.1785,.1836,.1904,.1938,.221 };
446 Float_t effic_gri[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
450 /**********************************End of Antonnelo's Values**********************************/
452 /**********************************Values from rich_media.f (31-vectors)**********************************/
455 //Photons energy intervals
459 ppckov[i] = (Float_t(i)*0.1+5.5)*1e-9;
460 //printf ("Energy intervals: %e\n",ppckov[i]);
464 //Refraction index for quarz
465 Float_t rindex_quarz[26];
472 Float_t ene=ppckov[i]*1e9;
473 Float_t a=f1/(e1*e1 - ene*ene);
474 Float_t b=f2/(e2*e2 - ene*ene);
475 rindex_quarz[i] = TMath::Sqrt(1. + a + b );
476 //printf ("Rindex_quarz: %e\n",rindex_quarz[i]);
479 //Refraction index for opaque quarz, methane and grid
480 Float_t rindex_quarzo[26];
481 Float_t rindex_methane[26];
482 Float_t rindex_gri[26];
486 rindex_methane[i]=1.000444;
488 //printf ("Rindex_quarzo , etc: %e, %e, %e\n",rindex_quarzo[i], rindex_methane[i], rindex_gri[i]=1);
491 //Absorption index for freon
492 Float_t absco_freon[26] = {179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987,
493 179.0987, 142.9206, 56.64957, 25.58622, 13.95293, 12.03905, 10.42953, 8.804196,
494 7.069031, 4.461292, 2.028366, 1.293013, .577267, .40746, .334964, 0., 0., 0.};
496 //Absorption index for quarz
497 /*Float_t Qzt [21] = {.0,.0,.005,.04,.35,.647,.769,.808,.829,.844,.853,.858,.869,.887,.903,.902,.902,
498 .906,.907,.907,.907};
499 Float_t Wavl2[] = {150.,155.,160.0,165.0,170.0,175.0,180.0,185.0,190.0,195.0,200.0,205.0,210.0,
500 215.0,220.0,225.0,230.0,235.0,240.0,245.0,250.0};
501 Float_t absco_quarz[31];
502 for (Int_t i=0;i<31;i++)
504 Float_t Xlam = 1237.79 / (ppckov[i]*1e9);
505 if (Xlam <= 160) absco_quarz[i] = 0;
506 if (Xlam > 250) absco_quarz[i] = 1;
509 for (Int_t j=0;j<21;j++)
511 //printf ("Passed\n");
512 if (Xlam > Wavl2[j] && Xlam < Wavl2[j+1])
514 Float_t Dabs = (Qzt[j+1] - Qzt[j])/(Wavl2[j+1] - Wavl2[j]);
515 Float_t Abso = Qzt[j] + Dabs*(Xlam - Wavl2[j]);
516 absco_quarz[i] = -5.0/(TMath::Log(Abso));
520 printf ("Absco_quarz: %e Absco_freon: %e for energy: %e\n",absco_quarz[i],absco_freon[i],ppckov[i]);
523 /*Float_t absco_quarz[31] = {49.64211, 48.41296, 47.46989, 46.50492, 45.13682, 44.47883, 43.1929 , 41.30922, 40.5943 ,
524 39.82956, 38.98623, 38.6247 , 38.43448, 37.41084, 36.22575, 33.74852, 30.73901, 24.25086,
525 17.94531, 11.88753, 5.99128, 3.83503, 2.36661, 1.53155, 1.30582, 1.08574, .8779708,
526 .675275, 0., 0., 0.};
528 for (Int_t i=0;i<31;i++)
530 absco_quarz[i] = absco_quarz[i]/10;
533 Float_t absco_quarz [26] = {105.8, 65.52, 48.58, 42.85, 35.79, 31.262, 28.598, 27.527, 25.007, 22.815, 21.004,
534 19.266, 17.525, 15.878, 14.177, 11.719, 9.282, 6.62, 4.0925, 2.601, 1.149, .667, .3627,
535 .192, .1497, .10857};
537 //Absorption index for methane
538 Float_t absco_methane[26];
541 absco_methane[i]=AbsoCH4(ppckov[i]*1e9);
542 //printf("Absco_methane: %e for energy: %e\n", absco_methane[i],ppckov[i]*1e9);
545 //Absorption index for opaque quarz, csi and grid, efficiency for all and grid
546 Float_t absco_quarzo[26];
547 Float_t absco_csi[26];
548 Float_t absco_gri[26];
549 Float_t effic_all[26];
550 Float_t effic_gri[26];
553 absco_quarzo[i]=1e-5;
558 //printf ("All must be 1: %e, %e, %e, %e, %e\n",absco_quarzo[i],absco_csi[i],absco_gri[i],effic_all[i],effic_gri[i]);
563 Float_t effic_csi[26] = {0.000199999995, 0.000600000028, 0.000699999975, 0.00499999989, 0.00749999983, 0.010125,
564 0.0242999997, 0.0405000001, 0.0688500032, 0.105299994, 0.121500008, 0.141749993, 0.157949999,
565 0.162, 0.166050002, 0.167669997, 0.174299985, 0.176789999, 0.179279998, 0.182599992, 0.18592,
566 0.187579989, 0.189239994, 0.190899998, 0.207499996, 0.215799987};
570 //FRESNEL LOSS CORRECTION FOR PERPENDICULAR INCIDENCE AND
571 //UNPOLARIZED PHOTONS
575 effic_csi[i] = effic_csi[i]/(1.-Fresnel(ppckov[i]*1e9,1.,0));
576 //printf ("Fresnel result: %e for energy: %e\n",Fresnel(ppckov[i]*1e9,1.,0),ppckov[i]*1e9);
579 /*******************************************End of rich_media.f***************************************/
586 Float_t afre[2], agri, amet[2], aqua[2], ahon, zfre[2], zgri, zhon,
590 Int_t nlmatmet, nlmatqua;
591 Float_t wmatquao[2], rindex_freon[26];
592 Float_t aquao[2], epsil, stmin, zquao[2];
594 Float_t radlal, densal, tmaxfd, deemax, stemax;
595 Float_t aal, zal, radlgri, densfre, radlhon, densgri, denshon,densqua, densmet, wmatfre[2], wmatmet[2], wmatqua[2];
597 Int_t *idtmed = fIdtmed->GetArray()-999;
599 TGeant3 *geant3 = (TGeant3*) gMC;
601 // --- Photon energy (GeV)
602 // --- Refraction indexes
603 for (i = 0; i < 26; ++i) {
604 rindex_freon[i] = ppckov[i] * .0172 * 1e9 + 1.177;
605 //printf ("Rindex_freon: %e \n Effic_csi: %e for energy: %e\n",rindex_freon[i], effic_csi[i], ppckov[i]);
608 // --- Detection efficiencies (quantum efficiency for CsI)
609 // --- Define parameters for honeycomb.
610 // Used carbon of equivalent rad. lenght
617 // --- Parameters to include in GSMIXT, relative to Quarz (SiO2)
628 // --- Parameters to include in GSMIXT, relative to opaque Quarz (SiO2)
639 // --- Parameters to include in GSMIXT, relative to Freon (C6F14)
650 // --- Parameters to include in GSMIXT, relative to methane (CH4)
661 // --- Parameters to include in GSMIXT, relative to anode grid (Cu)
668 // --- Parameters to include in GSMATE related to aluminium sheet
675 AliMaterial(1, "Air $", 14.61, 7.3, .001205, 30420., 67500);
676 AliMaterial(6, "HON", ahon, zhon, denshon, radlhon, 0);
677 AliMaterial(16, "CSI", ahon, zhon, denshon, radlhon, 0);
678 AliMixture(20, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
679 AliMixture(21, "QUAO", aquao, zquao, densquao, nlmatquao, wmatquao);
680 AliMixture(30, "FRE", afre, zfre, densfre, nlmatfre, wmatfre);
681 AliMixture(40, "MET", amet, zmet, densmet, nlmatmet, wmatmet);
682 AliMixture(41, "METG", amet, zmet, densmet, nlmatmet, wmatmet);
683 AliMaterial(11, "GRI", agri, zgri, densgri, radlgri, 0);
684 AliMaterial(50, "ALUM", aal, zal, densal, radlal, 0);
692 AliMedium(1, "DEFAULT MEDIUM AIR$", 1, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
693 AliMedium(2, "HONEYCOMB$", 6, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
694 AliMedium(3, "QUARZO$", 20, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
695 AliMedium(4, "FREON$", 30, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
696 AliMedium(5, "METANO$", 40, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
697 AliMedium(6, "CSI$", 16, 1, ISXFLD, SXMGMX,tmaxfd, stemax, deemax, epsil, stmin);
698 AliMedium(7, "GRIGLIA$", 11, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
699 AliMedium(8, "QUARZOO$", 21, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
700 AliMedium(9, "GAP$", 41, 1, ISXFLD, SXMGMX,tmaxfd, .1, -deemax, epsil, -stmin);
701 AliMedium(10, "ALUMINUM$", 50, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
704 geant3->Gsckov(idtmed[1000], 26, ppckov, absco_methane, effic_all, rindex_methane);
705 geant3->Gsckov(idtmed[1001], 26, ppckov, absco_methane, effic_all, rindex_methane);
706 geant3->Gsckov(idtmed[1002], 26, ppckov, absco_quarz, effic_all,rindex_quarz);
707 geant3->Gsckov(idtmed[1003], 26, ppckov, absco_freon, effic_all,rindex_freon);
708 geant3->Gsckov(idtmed[1004], 26, ppckov, absco_methane, effic_all, rindex_methane);
709 geant3->Gsckov(idtmed[1005], 26, ppckov, absco_csi, effic_csi, rindex_methane);
710 geant3->Gsckov(idtmed[1006], 26, ppckov, absco_gri, effic_gri, rindex_gri);
711 geant3->Gsckov(idtmed[1007], 26, ppckov, absco_quarzo, effic_all, rindex_quarzo);
712 geant3->Gsckov(idtmed[1008], 26, ppckov, absco_methane, effic_all, rindex_methane);
713 geant3->Gsckov(idtmed[1009], 26, ppckov, absco_gri, effic_gri, rindex_gri);
716 //___________________________________________
718 Float_t AliRICHv0::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)
721 //ENE(EV), PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
723 Float_t en[36] = {5.0,5.1,5.2,5.3,5.4,5.5,5.6,5.7,5.8,5.9,6.0,6.1,6.2,
724 6.3,6.4,6.5,6.6,6.7,6.8,6.9,7.0,7.1,7.2,7.3,7.4,7.5,7.6,7.7,
725 7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
728 Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
729 2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
730 2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
733 Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
734 0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
735 0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
738 Int_t j=Int_t(xe*10)-49;
739 Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
740 Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
742 //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
743 //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
745 Float_t sinin=TMath::Sqrt(1-pdoti*pdoti);
746 Float_t tanin=sinin/pdoti;
748 Float_t c1=cn*cn-ck*ck-sinin*sinin;
749 Float_t c2=4*cn*cn*ck*ck;
750 Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
751 Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
753 Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
754 Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
757 //CORRECTION FACTOR FOR SURFACE ROUGHNESS
758 //B.J. STAGG APPLIED OPTICS, 30(1991),4113
761 Float_t lamb=1240/ene;
764 Float_t rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
768 Float_t pdotr=0.8; //DEGREE OF POLARIZATION : 1->P , -1->S
769 fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
778 //__________________________________________
780 Float_t AliRICHv0::AbsoCH4(Float_t x)
783 //LOSCH,SCH4(9),WL(9),EM(9),ALENGTH(31)
784 Float_t sch4[9] = {.12,.16,.23,.38,.86,2.8,7.9,28.,80.}; //MB X 10^22
785 //Float_t wl[9] = {153.,152.,151.,150.,149.,148.,147.,146.,145};
786 Float_t em[9] = {8.1,8.158,8.212,8.267,8.322,8.378,8.435,8.493,8.55};
787 const Float_t losch=2.686763E19; // LOSCHMIDT NUMBER IN CM-3
788 const Float_t igas1=100, igas2=0, oxy=10., wat=5., pre=750.,tem=283.;
790 Float_t tn=tem/273.16;
793 // ------- METHANE CROSS SECTION -----------------
794 // ASTROPH. J. 214, L47 (1978)
800 if(x>=7.75 && x<=8.1)
802 Float_t c0=-1.655279e-1;
803 Float_t c1=6.307392e-2;
804 Float_t c2=-8.011441e-3;
805 Float_t c3=3.392126e-4;
806 sm=(c0+c1*x+c2*x*x+c3*x*x*x)*1.e-18;
812 while (x<=em[j] && x>=em[j+1])
815 Float_t a=(sch4[j+1]-sch4[j])/(em[j+1]-em[j]);
816 sm=(sch4[j]+a*(x-em[j]))*1e-22;
820 Float_t dm=(igas1/100.)*(1.-((oxy+wat)/1.e6))*losch*pn/tn;
821 Float_t abslm=1./sm/dm;
823 // ------- ISOBUTHANE CROSS SECTION --------------
824 // i-C4H10 (ai) abs. length from curves in
825 // Lu-McDonald paper for BARI RICH workshop .
826 // -----------------------------------------------------------
835 if(x>=7.25 && x<7.375)
841 Float_t si = 1./(ai*losch*273.16/293.); // ISOB. CRO.SEC.IN CM2
842 Float_t di=(igas2/100.)*(1.-((oxy+wat)/1.e6))*losch*pn/tn;
847 // ---------------------------------------------------------
849 // transmission of O2
851 // y= path in cm, x=energy in eV
852 // so= cross section for UV absorption in cm2
853 // do= O2 molecular density in cm-3
854 // ---------------------------------------------------------
862 so=3.392709e-13 * TMath::Exp(2.864104 *x);
868 so=2.910039e-34 * TMath::Exp(10.3337*x);
875 Float_t a0=-73770.76;
877 Float_t a2=-11475.44;
879 Float_t a4=-86.07027;
881 so= a0+(a1*x)+(a2*x*x)+(a3*x*x*x)+(a4*x*x*x*x)+(a5*x*x*x*x*x);
885 Float_t dox=(oxy/1e6)*losch*pn/tn;
890 // ---------------------------------------------------------
892 // transmission of H2O
894 // y= path in cm, x=energy in eV
895 // sw= cross section for UV absorption in cm2
896 // dw= H2O molecular density in cm-3
897 // ---------------------------------------------------------
902 Float_t b1=-15807.74;
904 Float_t b3=-285.4809;
909 Float_t sw= b0+(b1*x)+(b2*x*x)+(b3*x*x*x)+(b4*x*x*x*x);
911 Float_t dw=(wat/1e6)*losch*pn/tn;
917 // ---------------------------------------------------------
919 Float_t alength=1./(1./abslm+1./absli+1./abslo+1./abslw);
926 //___________________________________________
928 void AliRICHv0::Init()
931 printf("*********************************** RICH_INIT ***********************************\n");
933 printf("* AliRICHv0 Default version started *\n");
937 AliRICHSegmentation* segmentation;
938 AliRICHGeometry* geometry;
939 AliRICHResponse* response;
943 // Initialize Tracking Chambers
945 for (Int_t i=1; i<7; i++) {
947 ( (AliRICHChamber*) (*fChambers)[i])->Init();
951 // Set the chamber (sensitive region) GEANT identifier
953 ((AliRICHChamber*)(*fChambers)[0])->SetGid(1);
954 ((AliRICHChamber*)(*fChambers)[1])->SetGid(2);
955 ((AliRICHChamber*)(*fChambers)[2])->SetGid(3);
956 ((AliRICHChamber*)(*fChambers)[3])->SetGid(4);
957 ((AliRICHChamber*)(*fChambers)[4])->SetGid(5);
958 ((AliRICHChamber*)(*fChambers)[5])->SetGid(6);
959 ((AliRICHChamber*)(*fChambers)[6])->SetGid(7);
961 Float_t pos1[3]={0,471.8999,165.2599};
962 Chamber(0).SetChamberTransform(pos1[0],pos1[1],pos1[2],new TRotMatrix("rot993","rot993",90,0,70.69,90,19.30999,-90));
964 Float_t pos2[3]={171,470,0};
965 Chamber(1).SetChamberTransform(pos2[0],pos2[1],pos2[2],new TRotMatrix("rot994","rot994",90,-20,90,70,0,0));
967 Float_t pos3[3]={0,500,0};
968 Chamber(2).SetChamberTransform(pos3[0],pos3[1],pos3[2],new TRotMatrix("rot995","rot995",90,0,90,90,0,0));
970 Float_t pos4[3]={-171,470,0};
971 Chamber(3).SetChamberTransform(pos4[0],pos4[1],pos4[2], new TRotMatrix("rot996","rot996",90,20,90,110,0,0));
973 Float_t pos5[3]={161.3999,443.3999,-165.3};
974 Chamber(4).SetChamberTransform(pos5[0],pos5[1],pos5[2],new TRotMatrix("rot997","rot997",90,340,108.1999,70,18.2,70));
976 Float_t pos6[3]={0., 471.9, -165.3,};
977 Chamber(5).SetChamberTransform(pos6[0],pos6[1],pos6[2],new TRotMatrix("rot998","rot998",90,0,109.3099,90,19.30999,90));
979 Float_t pos7[3]={-161.399,443.3999,-165.3};
980 Chamber(6).SetChamberTransform(pos7[0],pos7[1],pos7[2],new TRotMatrix("rot999","rot999",90,20,108.1999,110,18.2,110));
982 segmentation=Chamber(0).GetSegmentationModel(0);
983 geometry=Chamber(0).GetGeometryModel();
984 response=Chamber(0).GetResponseModel();
987 printf("* Pads : %3dx%3d *\n",segmentation->Npx(),segmentation->Npy());
988 printf("* Pad size : %5.2f x%5.2f mm2 *\n",segmentation->Dpx(),segmentation->Dpy());
989 printf("* Gap Thickness : %5.1f mm *\n",geometry->GetGapThickness());
990 printf("* Radiator Width : %5.1f mm *\n",geometry->GetQuartzWidth());
991 printf("* Radiator Length : %5.1f mm *\n",geometry->GetQuartzLength());
992 printf("* Freon Thickness : %5.1f mm *\n",geometry->GetFreonThickness());
993 printf("* Charge Slope : %5.1f ADC *\n",response->ChargeSlope());
994 printf("* Feedback Prob. : %5.2f %% *\n",response->AlphaFeedback());
996 printf("* Success! *\n");
998 printf("*********************************************************************************\n");
1002 //___________________________________________
1003 void AliRICHv0::StepManager()
1005 //Dummy step manager
1009 //___________________________________________
1010 Int_t AliRICH::MakePadHits(Float_t xhit,Float_t yhit,Float_t eloss, Int_t idvol, Response_t res)
1013 // Calls the charge disintegration method of the current chamber and adds
1014 // the simulated cluster to the root treee
1017 Float_t newclust[6][500];
1021 // Integrated pulse height on chamber
1025 ((AliRICHChamber*) (*fChambers)[idvol])->DisIntegration(eloss, xhit, yhit, nnew, newclust, res);
1030 for (Int_t i=0; i<nnew; i++) {
1031 if (Int_t(newclust[3][i]) > 0) {
1034 clhits[1] = Int_t(newclust[5][i]);
1036 clhits[2] = Int_t(newclust[0][i]);
1038 clhits[3] = Int_t(newclust[1][i]);
1040 clhits[4] = Int_t(newclust[2][i]);
1042 clhits[5] = Int_t(newclust[3][i]);
1043 // Pad: chamber sector
1044 clhits[6] = Int_t(newclust[4][i]);