Added #include <stdlib.h>
[u/mrichter/AliRoot.git] / RICH / AliRICHv0.cxx
CommitLineData
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/*
6e36c0f2 17 $Log$
8140b37e 18 Revision 1.5 2000/04/19 13:28:46 morsch
19 Major changes in geometry (parametrised), materials (updated) and
20 step manager (diagnostics) (JB, AM)
21
4c039060 22*/
23
6e36c0f2 24
25
26////////////////////////////////////////////////////////
ddae0931 27// Manager and hits classes for set:RICH version 0 //
28/////////////////////////////////////////////////////////
29
30#include <TTUBE.h>
31#include <TNode.h>
32#include <TRandom.h>
33
34#include "AliRICHv0.h"
35#include "AliRun.h"
36#include "AliMC.h"
37#include "iostream.h"
38#include "AliCallf77.h"
39#include "AliConst.h"
6e36c0f2 40#include "AliPDG.h"
ddae0931 41#include "TGeant3.h"
42
43ClassImp(AliRICHv0)
44
45//___________________________________________
46AliRICHv0::AliRICHv0() : AliRICH()
47{
6e36c0f2 48 //fChambers = 0;
ddae0931 49}
50
51//___________________________________________
52AliRICHv0::AliRICHv0(const char *name, const char *title)
53 : AliRICH(name,title)
54{
6e36c0f2 55 fCkov_number=0;
56 fFreon_prod=0;
57
ddae0931 58 fChambers = new TObjArray(7);
59 for (Int_t i=0; i<7; i++) {
60
6e36c0f2 61 (*fChambers)[i] = new AliRICHChamber();
ddae0931 62
6e36c0f2 63 }
ddae0931 64}
65
66
67//___________________________________________
68void AliRICHv0::CreateGeometry()
69{
70 //
71 // Create the geometry for RICH version 1
72 //
73 // Modified by: N. Colonna (INFN - BARI, Nicola.Colonna@ba.infn.it)
74 // R.A. Fini (INFN - BARI, Rosanna.Fini@ba.infn.it)
75 // R.A. Loconsole (Bari University, loco@riscom.ba.infn.it)
76 //
77 //Begin_Html
78 /*
79 <img src="picts/AliRICHv1.gif">
80 */
81 //End_Html
82 //Begin_Html
83 /*
84 <img src="picts/AliRICHv1Tree.gif">
85 */
86 //End_Html
6e36c0f2 87
88 AliRICH *RICH = (AliRICH *) gAlice->GetDetector("RICH");
89 AliRICHSegmentation* segmentation;
90 AliRICHGeometry* geometry;
91 AliRICHChamber* iChamber;
92
93 iChamber = &(RICH->Chamber(0));
94 segmentation=iChamber->GetSegmentationModel(0);
95 geometry=iChamber->GetGeometryModel();
ddae0931 96
97
98 Int_t *idtmed = fIdtmed->GetArray()-999;
99
100 Int_t i;
101 Float_t zs;
102 Int_t idrotm[1099];
103 Float_t par[3];
104
105 // --- Define the RICH detector
106 // External aluminium box
107 par[0] = 71.1;
6e36c0f2 108 par[1] = 11.5; //Original Settings
ddae0931 109 par[2] = 73.15;
6e36c0f2 110 /*par[0] = 73.15;
111 par[1] = 11.5;
112 par[2] = 71.1;*/
ddae0931 113 gMC->Gsvolu("RICH", "BOX ", idtmed[1009], par, 3);
114
115 // Sensitive part of the whole RICH
116 par[0] = 64.8;
6e36c0f2 117 par[1] = 11.5; //Original Settings
ddae0931 118 par[2] = 66.55;
6e36c0f2 119 /*par[0] = 66.55;
120 par[1] = 11.5;
121 par[2] = 64.8;*/
ddae0931 122 gMC->Gsvolu("SRIC", "BOX ", idtmed[1000], par, 3);
123
124 // Honeycomb
125 par[0] = 63.1;
6e36c0f2 126 par[1] = .188; //Original Settings
ddae0931 127 par[2] = 66.55;
6e36c0f2 128 /*par[0] = 66.55;
129 par[1] = .188;
130 par[2] = 63.1;*/
ddae0931 131 gMC->Gsvolu("HONE", "BOX ", idtmed[1001], par, 3);
132
133 // Aluminium sheet
134 par[0] = 63.1;
6e36c0f2 135 par[1] = .025; //Original Settings
ddae0931 136 par[2] = 66.55;
6e36c0f2 137 /*par[0] = 66.5;
138 par[1] = .025;
139 par[2] = 63.1;*/
ddae0931 140 gMC->Gsvolu("ALUM", "BOX ", idtmed[1009], par, 3);
141
142 // Quartz
6e36c0f2 143 par[0] = geometry->GetQuartzWidth()/2;
144 par[1] = geometry->GetQuartzThickness()/2;
145 par[2] = geometry->GetQuartzLength()/2;
146 /*par[0] = 63.1;
147 par[1] = .25; //Original Settings
148 par[2] = 65.5;*/
149 /*par[0] = geometry->GetQuartzWidth()/2;
150 par[1] = geometry->GetQuartzThickness()/2;
151 par[2] = geometry->GetQuartzLength()/2;*/
152 //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]);
ddae0931 153 gMC->Gsvolu("QUAR", "BOX ", idtmed[1002], par, 3);
154
155 // Spacers (cylinders)
156 par[0] = 0.;
157 par[1] = .5;
6e36c0f2 158 par[2] = geometry->GetFreonThickness()/2;
ddae0931 159 gMC->Gsvolu("SPAC", "TUBE", idtmed[1002], par, 3);
160
161 // Opaque quartz
162 par[0] = 61.95;
6e36c0f2 163 par[1] = .2; //Original Settings
ddae0931 164 par[2] = 66.5;
6e36c0f2 165 /*par[0] = 66.5;
166 par[1] = .2;
167 par[2] = 61.95;*/
ddae0931 168 gMC->Gsvolu("OQUA", "BOX ", idtmed[1007], par, 3);
169
6e36c0f2 170 // Frame of opaque quartz
171 par[0] = geometry->GetOuterFreonWidth()/2;
172 par[1] = geometry->GetFreonThickness()/2;
173 par[2] = geometry->GetOuterFreonLength()/2 + 1;
174 /*par[0] = 20.65;
175 par[1] = .5; //Original Settings
176 par[2] = 66.5;*/
177 /*par[0] = 66.5;
ddae0931 178 par[1] = .5;
6e36c0f2 179 par[2] = 20.65;*/
180 gMC->Gsvolu("OQF1", "BOX ", idtmed[1007], par, 3);
181
182 par[0] = geometry->GetInnerFreonWidth()/2;
183 par[1] = geometry->GetFreonThickness()/2;
184 par[2] = geometry->GetInnerFreonLength()/2 + 1;
185 gMC->Gsvolu("OQF2", "BOX ", idtmed[1007], par, 3);
ddae0931 186
187 // Little bar of opaque quartz
6e36c0f2 188 par[0] = .275;
189 par[1] = geometry->GetQuartzThickness()/2;
190 par[2] = geometry->GetInnerFreonLength()/2 - 2.4;
191 /*par[0] = .275;
192 par[1] = .25; //Original Settings
193 par[2] = 63.1;*/
194 /*par[0] = 63.1;
ddae0931 195 par[1] = .25;
6e36c0f2 196 par[2] = .275;*/
ddae0931 197 gMC->Gsvolu("BARR", "BOX ", idtmed[1007], par, 3);
198
199 // Freon
6e36c0f2 200 par[0] = geometry->GetOuterFreonWidth()/2;
201 par[1] = geometry->GetFreonThickness()/2;
202 par[2] = geometry->GetOuterFreonLength()/2;
203 /*par[0] = 20.15;
204 par[1] = .5; //Original Settings
205 par[2] = 65.5;*/
206 /*par[0] = 65.5;
ddae0931 207 par[1] = .5;
6e36c0f2 208 par[2] = 20.15;*/
209 gMC->Gsvolu("FRE1", "BOX ", idtmed[1003], par, 3);
210
211 par[0] = geometry->GetInnerFreonWidth()/2;
212 par[1] = geometry->GetFreonThickness()/2;
213 par[2] = geometry->GetInnerFreonLength()/2;
214 gMC->Gsvolu("FRE2", "BOX ", idtmed[1003], par, 3);
ddae0931 215
216 // Methane
217 par[0] = 64.8;
6e36c0f2 218 par[1] = geometry->GetGapThickness()/2;
219 //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]);
ddae0931 220 par[2] = 64.8;
221 gMC->Gsvolu("META", "BOX ", idtmed[1004], par, 3);
222
223 // Methane gap
224 par[0] = 64.8;
6e36c0f2 225 par[1] = geometry->GetProximityGapThickness()/2;
226 //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]);
ddae0931 227 par[2] = 64.8;
228 gMC->Gsvolu("GAP ", "BOX ", idtmed[1008], par, 3);
229
230 // CsI photocathode
231 par[0] = 64.8;
232 par[1] = .25;
233 par[2] = 64.8;
234 gMC->Gsvolu("CSI ", "BOX ", idtmed[1005], par, 3);
235
236 // Anode grid
237 par[0] = 0.;
6e36c0f2 238 par[1] = .001;
ddae0931 239 par[2] = 20.;
240 gMC->Gsvolu("GRID", "TUBE", idtmed[1006], par, 3);
241
242 // --- Places the detectors defined with GSVOLU
243 // Place material inside RICH
244 gMC->Gspos("SRIC", 1, "RICH", 0., 0., 0., 0, "ONLY");
245
6e36c0f2 246 gMC->Gspos("ALUM", 1, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .4 -.05 - .376 -.025, 0., 0, "ONLY");
247 gMC->Gspos("HONE", 1, "SRIC", 0., 1.276- geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .4 -.05 - .188, 0., 0, "ONLY");
248 gMC->Gspos("ALUM", 2, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .4 - .025, 0., 0, "ONLY");
249 gMC->Gspos("OQUA", 1, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .2, 0., 0, "ONLY");
ddae0931 250
251 AliMatrix(idrotm[1019], 0., 0., 90., 0., 90., 90.);
252
6e36c0f2 253 Int_t nspacers = (Int_t)(TMath::Abs(geometry->GetInnerFreonLength()/14.4));
254 //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);
255
256 //for (i = 1; i <= 9; ++i) {
257 //zs = (5 - i) * 14.4; //Original settings
258 for (i = 0; i <= nspacers; i++) {
259 zs = (TMath::Abs(nspacers/2) - i) * 14.4;
260 gMC->Gspos("SPAC", i, "FRE1", 6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
261 //gMC->Gspos("SPAC", i, "FRE1", zs, 0., 6.7, idrotm[1019], "ONLY");
ddae0931 262 }
6e36c0f2 263 //for (i = 10; i <= 18; ++i) {
264 //zs = (14 - i) * 14.4; //Original settings
265 for (i = nspacers; i < nspacers*2; ++i) {
266 zs = (nspacers + TMath::Abs(nspacers/2) - i) * 14.4;
267 gMC->Gspos("SPAC", i, "FRE1", -6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
268 //gMC->Gspos("SPAC", i, "FRE1", zs, 0., -6.7, idrotm[1019], "ONLY");
269 }
270
271 //for (i = 1; i <= 9; ++i) {
272 //zs = (5 - i) * 14.4; //Original settings
273 for (i = 0; i <= nspacers; i++) {
274 zs = (TMath::Abs(nspacers/2) - i) * 14.4;
275 gMC->Gspos("SPAC", i, "FRE2", 6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
276 //gMC->Gspos("SPAC", i, "FRE2", zs, 0., 6.7, idrotm[1019], "ONLY");
277 }
278 //for (i = 10; i <= 18; ++i) {
279 //zs = (5 - i) * 14.4; //Original settings
280 for (i = nspacers; i < nspacers*2; ++i) {
281 zs = (nspacers + TMath::Abs(nspacers/2) - i) * 14.4;
282 gMC->Gspos("SPAC", i, "FRE2", -6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
283 //gMC->Gspos("SPAC", i, "FRE2", zs, 0., -6.7, idrotm[1019], "ONLY");
ddae0931 284 }
285
6e36c0f2 286 /*gMC->Gspos("FRE1", 1, "OQF1", 0., 0., 0., 0, "ONLY");
287 gMC->Gspos("FRE2", 1, "OQF2", 0., 0., 0., 0, "ONLY");
288 gMC->Gspos("OQF1", 1, "SRIC", 31.3, -4.724, 41.3, 0, "ONLY");
289 gMC->Gspos("OQF2", 2, "SRIC", 0., -4.724, 0., 0, "ONLY");
290 gMC->Gspos("OQF1", 3, "SRIC", -31.3, -4.724, -41.3, 0, "ONLY");
291 gMC->Gspos("BARR", 1, "QUAR", -21.65, 0., 0., 0, "ONLY"); //Original settings
292 gMC->Gspos("BARR", 2, "QUAR", 21.65, 0., 0., 0, "ONLY"); //Original settings
ddae0931 293 gMC->Gspos("QUAR", 1, "SRIC", 0., -3.974, 0., 0, "ONLY");
294 gMC->Gspos("GAP ", 1, "META", 0., 4.8, 0., 0, "ONLY");
295 gMC->Gspos("META", 1, "SRIC", 0., 1.276, 0., 0, "ONLY");
6e36c0f2 296 gMC->Gspos("CSI ", 1, "SRIC", 0., 6.526, 0., 0, "ONLY");*/
297
298
299 gMC->Gspos("FRE1", 1, "OQF1", 0., 0., 0., 0, "ONLY");
300 gMC->Gspos("FRE2", 1, "OQF2", 0., 0., 0., 0, "ONLY");
301 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)
302 gMC->Gspos("OQF2", 2, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()/2, 0., 0, "ONLY"); //Original settings
303 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)
304 gMC->Gspos("BARR", 1, "QUAR", -21.65, 0., 0., 0, "ONLY"); //Original settings
305 gMC->Gspos("BARR", 2, "QUAR", 21.65, 0., 0., 0, "ONLY"); //Original settings
306 gMC->Gspos("QUAR", 1, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness()/2, 0., 0, "ONLY");
307 gMC->Gspos("GAP ", 1, "META", 0., geometry->GetGapThickness()/2+ geometry->GetProximityGapThickness()/2, 0., 0, "ONLY");
308 gMC->Gspos("META", 1, "SRIC", 0., 1.276, 0., 0, "ONLY");
309 gMC->Gspos("CSI ", 1, "SRIC", 0., 1.276 + geometry->GetGapThickness()/2 + geometry->GetProximityGapThickness() + .25, 0., 0, "ONLY");
ddae0931 310
311 // Place RICH inside ALICE apparatus
312
313 AliMatrix(idrotm[1000], 90., 0., 70.69, 90., 19.31, -90.);
314 AliMatrix(idrotm[1001], 90., -20., 90., 70., 0., 0.);
315 AliMatrix(idrotm[1002], 90., 0., 90., 90., 0., 0.);
316 AliMatrix(idrotm[1003], 90., 20., 90., 110., 0., 0.);
317 AliMatrix(idrotm[1004], 90., 340., 108.2, 70., 18.2, 70.);
318 AliMatrix(idrotm[1005], 90., 0., 109.31, 90., 19.31, 90.);
319 AliMatrix(idrotm[1006], 90., 20., 108.2, 110., 18.2, 110.);
320
321 gMC->Gspos("RICH", 1, "ALIC", 0., 471.9, 165.26, idrotm[1000], "ONLY");
322 gMC->Gspos("RICH", 2, "ALIC", 171., 470., 0., idrotm[1001], "ONLY");
323 gMC->Gspos("RICH", 3, "ALIC", 0., 500., 0., idrotm[1002], "ONLY");
324 gMC->Gspos("RICH", 4, "ALIC", -171., 470., 0., idrotm[1003], "ONLY");
325 gMC->Gspos("RICH", 5, "ALIC", 161.4, 443.4, -165.3, idrotm[1004], "ONLY");
326 gMC->Gspos("RICH", 6, "ALIC", 0., 471.9, -165.3, idrotm[1005], "ONLY");
327 gMC->Gspos("RICH", 7, "ALIC", -161.4, 443.4, -165.3, idrotm[1006], "ONLY");
328
329}
330
331
332//___________________________________________
333void AliRICHv0::CreateMaterials()
334{
335 //
336 // *** DEFINITION OF AVAILABLE RICH MATERIALS ***
337 // ORIGIN : NICK VAN EIJNDHOVEN
338 // Modified by: N. Colonna (INFN - BARI, Nicola.Colonna@ba.infn.it)
339 // R.A. Fini (INFN - BARI, Rosanna.Fini@ba.infn.it)
340 // R.A. Loconsole (Bari University, loco@riscom.ba.infn.it)
341 //
342 Int_t ISXFLD = gAlice->Field()->Integ();
343 Float_t SXMGMX = gAlice->Field()->Max();
6e36c0f2 344 Int_t i;
345
346 /************************************Antonnelo's Values (14-vectors)*****************************************/
347 /*
ddae0931 348 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,
349 6.7e-9,6.88e-9,7.08e-9,7.3e-9,7.51e-9,7.74e-9,8e-9 };
350 Float_t rindex_quarz[14] = { 1.528309,1.533333,
351 1.538243,1.544223,1.550568,1.55777,
352 1.565463,1.574765,1.584831,1.597027,
353 1.611858,1.6277,1.6472,1.6724 };
354 Float_t rindex_quarzo[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
355 Float_t rindex_methane[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
356 Float_t rindex_gri[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
357 Float_t absco_freon[14] = { 179.0987,179.0987,
6e36c0f2 358 179.0987,179.0987,179.0987,142.92,56.65,13.95,10.43,7.07,2.03,.5773,.33496,0. };
359 //Float_t absco_freon[14] = { 1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,
360 // 1e-5,1e-5,1e-5,1e-5,1e-5 };
361 Float_t absco_quarz[14] = { 64.035,39.98,35.665,31.262,27.527,22.815,21.04,17.52,
362 14.177,9.282,4.0925,1.149,.3627,.10857 };
ddae0931 363 Float_t absco_quarzo[14] = { 1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,
364 1e-5,1e-5,1e-5,1e-5,1e-5 };
365 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,
366 1e-4,1e-4,1e-4,1e-4 };
367 Float_t absco_methane[14] = { 1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,
368 1e6,1e6,1e6 };
369 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,
370 1e-4,1e-4,1e-4,1e-4 };
371 Float_t effic_all[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
6e36c0f2 372 Float_t effic_csi[14] = { 6e-4,.005,.0075,.01125,.045,.117,.135,.16575,
373 .17425,.1785,.1836,.1904,.1938,.221 };
ddae0931 374 Float_t effic_gri[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
6e36c0f2 375 */
376
377
378 /**********************************End of Antonnelo's Values**********************************/
379
380 /**********************************Values from rich_media.f (31-vectors)**********************************/
381
382
383 //Photons energy intervals
384 Float_t ppckov[26];
385 for (i=0;i<26;i++)
386 {
387 ppckov[i] = (Float_t(i)*0.1+5.5)*1e-9;
388 //printf ("Energy intervals: %e\n",ppckov[i]);
389 }
390
391
392 //Refraction index for quarz
393 Float_t rindex_quarz[26];
394 Float_t e1= 10.666;
395 Float_t e2= 18.125;
396 Float_t f1= 46.411;
397 Float_t f2= 228.71;
398 for (i=0;i<26;i++)
399 {
400 Float_t ene=ppckov[i]*1e9;
401 Float_t a=f1/(e1*e1 - ene*ene);
402 Float_t b=f2/(e2*e2 - ene*ene);
403 rindex_quarz[i] = TMath::Sqrt(1. + a + b );
404 //printf ("Rindex_quarz: %e\n",rindex_quarz[i]);
405 }
406
407 //Refraction index for opaque quarz, methane and grid
408 Float_t rindex_quarzo[26];
409 Float_t rindex_methane[26];
410 Float_t rindex_gri[26];
411 for (i=0;i<26;i++)
412 {
413 rindex_quarzo[i]=1;
414 rindex_methane[i]=1.000444;
415 rindex_gri[i]=1;
416 //printf ("Rindex_quarzo , etc: %e, %e, %e\n",rindex_quarzo[i], rindex_methane[i], rindex_gri[i]=1);
417 }
418
419 //Absorption index for freon
420 Float_t absco_freon[26] = {179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987,
421 179.0987, 142.9206, 56.64957, 25.58622, 13.95293, 12.03905, 10.42953, 8.804196,
422 7.069031, 4.461292, 2.028366, 1.293013, .577267, .40746, .334964, 0., 0., 0.};
423
424 //Absorption index for quarz
425 /*Float_t Qzt [21] = {.0,.0,.005,.04,.35,.647,.769,.808,.829,.844,.853,.858,.869,.887,.903,.902,.902,
426 .906,.907,.907,.907};
427 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,
428 215.0,220.0,225.0,230.0,235.0,240.0,245.0,250.0};
429 Float_t absco_quarz[31];
430 for (Int_t i=0;i<31;i++)
431 {
432 Float_t Xlam = 1237.79 / (ppckov[i]*1e9);
433 if (Xlam <= 160) absco_quarz[i] = 0;
434 if (Xlam > 250) absco_quarz[i] = 1;
435 else
436 {
437 for (Int_t j=0;j<21;j++)
438 {
439 //printf ("Passed\n");
440 if (Xlam > Wavl2[j] && Xlam < Wavl2[j+1])
441 {
442 Float_t Dabs = (Qzt[j+1] - Qzt[j])/(Wavl2[j+1] - Wavl2[j]);
443 Float_t Abso = Qzt[j] + Dabs*(Xlam - Wavl2[j]);
444 absco_quarz[i] = -5.0/(TMath::Log(Abso));
445 }
446 }
447 }
448 printf ("Absco_quarz: %e Absco_freon: %e for energy: %e\n",absco_quarz[i],absco_freon[i],ppckov[i]);
449 }*/
450
451 /*Float_t absco_quarz[31] = {49.64211, 48.41296, 47.46989, 46.50492, 45.13682, 44.47883, 43.1929 , 41.30922, 40.5943 ,
452 39.82956, 38.98623, 38.6247 , 38.43448, 37.41084, 36.22575, 33.74852, 30.73901, 24.25086,
453 17.94531, 11.88753, 5.99128, 3.83503, 2.36661, 1.53155, 1.30582, 1.08574, .8779708,
454 .675275, 0., 0., 0.};
455
456 for (Int_t i=0;i<31;i++)
457 {
458 absco_quarz[i] = absco_quarz[i]/10;
459 }*/
460
461 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,
462 19.266, 17.525, 15.878, 14.177, 11.719, 9.282, 6.62, 4.0925, 2.601, 1.149, .667, .3627,
463 .192, .1497, .10857};
464
465 //Absorption index for methane
466 Float_t absco_methane[26];
467 for (i=0;i<26;i++)
468 {
469 absco_methane[i]=AbsoCH4(ppckov[i]*1e9);
470 //printf("Absco_methane: %e for energy: %e\n", absco_methane[i],ppckov[i]*1e9);
471 }
472
473 //Absorption index for opaque quarz, csi and grid, efficiency for all and grid
474 Float_t absco_quarzo[26];
475 Float_t absco_csi[26];
476 Float_t absco_gri[26];
477 Float_t effic_all[26];
478 Float_t effic_gri[26];
479 for (i=0;i<26;i++)
480 {
481 absco_quarzo[i]=1e-5;
482 absco_csi[i]=1e-4;
483 absco_gri[i]=1e-4;
484 effic_all[i]=1;
485 effic_gri[i]=1;
486 //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]);
487 }
488
489 //Efficiency for csi
490
491 Float_t effic_csi[26] = {0.000199999995, 0.000600000028, 0.000699999975, 0.00499999989, 0.00749999983, 0.010125,
492 0.0242999997, 0.0405000001, 0.0688500032, 0.105299994, 0.121500008, 0.141749993, 0.157949999,
493 0.162, 0.166050002, 0.167669997, 0.174299985, 0.176789999, 0.179279998, 0.182599992, 0.18592,
494 0.187579989, 0.189239994, 0.190899998, 0.207499996, 0.215799987};
495
496
497
498 //FRESNEL LOSS CORRECTION FOR PERPENDICULAR INCIDENCE AND
499 //UNPOLARIZED PHOTONS
500
501 for (i=0;i<26;i++)
502 {
503 effic_csi[i] = effic_csi[i]/(1.-Fresnel(ppckov[i]*1e9,1.,0));
504 //printf ("Fresnel result: %e for energy: %e\n",Fresnel(ppckov[i]*1e9,1.,0),ppckov[i]*1e9);
505 }
506
507 /*******************************************End of rich_media.f***************************************/
508
509
510
511
512
ddae0931 513
514 Float_t afre[2], agri, amet[2], aqua[2], ahon, zfre[2], zgri, zhon,
515 zmet[2], zqua[2];
516 Int_t nlmatfre;
517 Float_t densquao;
518 Int_t nlmatmet, nlmatqua;
6e36c0f2 519 Float_t wmatquao[2], rindex_freon[26];
ddae0931 520 Float_t aquao[2], epsil, stmin, zquao[2];
521 Int_t nlmatquao;
522 Float_t radlal, densal, tmaxfd, deemax, stemax;
523 Float_t aal, zal, radlgri, densfre, radlhon, densgri, denshon,densqua, densmet, wmatfre[2], wmatmet[2], wmatqua[2];
524
525 Int_t *idtmed = fIdtmed->GetArray()-999;
526
527 TGeant3 *geant3 = (TGeant3*) gMC;
528
529 // --- Photon energy (GeV)
530 // --- Refraction indexes
6e36c0f2 531 for (i = 0; i < 26; ++i) {
532 rindex_freon[i] = ppckov[i] * .0172 * 1e9 + 1.177;
533 //printf ("Rindex_freon: %e \n Effic_csi: %e for energy: %e\n",rindex_freon[i], effic_csi[i], ppckov[i]);
ddae0931 534 }
6e36c0f2 535
ddae0931 536 // --- Detection efficiencies (quantum efficiency for CsI)
537 // --- Define parameters for honeycomb.
538 // Used carbon of equivalent rad. lenght
539
540 ahon = 12.01;
541 zhon = 6.;
542 denshon = 2.265;
543 radlhon = 18.8;
544
545 // --- Parameters to include in GSMIXT, relative to Quarz (SiO2)
546
547 aqua[0] = 28.09;
548 aqua[1] = 16.;
549 zqua[0] = 14.;
550 zqua[1] = 8.;
551 densqua = 2.64;
552 nlmatqua = -2;
553 wmatqua[0] = 1.;
554 wmatqua[1] = 2.;
555
556 // --- Parameters to include in GSMIXT, relative to opaque Quarz (SiO2)
557
558 aquao[0] = 28.09;
559 aquao[1] = 16.;
560 zquao[0] = 14.;
561 zquao[1] = 8.;
562 densquao = 2.64;
563 nlmatquao = -2;
564 wmatquao[0] = 1.;
565 wmatquao[1] = 2.;
566
567 // --- Parameters to include in GSMIXT, relative to Freon (C6F14)
568
569 afre[0] = 12.;
570 afre[1] = 19.;
571 zfre[0] = 6.;
572 zfre[1] = 9.;
573 densfre = 1.7;
574 nlmatfre = -2;
575 wmatfre[0] = 6.;
576 wmatfre[1] = 14.;
577
578 // --- Parameters to include in GSMIXT, relative to methane (CH4)
579
580 amet[0] = 12.01;
581 amet[1] = 1.;
582 zmet[0] = 6.;
583 zmet[1] = 1.;
584 densmet = 7.17e-4;
585 nlmatmet = -2;
586 wmatmet[0] = 1.;
587 wmatmet[1] = 4.;
588
589 // --- Parameters to include in GSMIXT, relative to anode grid (Cu)
590
591 agri = 63.54;
592 zgri = 29.;
593 densgri = 8.96;
594 radlgri = 1.43;
595
596 // --- Parameters to include in GSMATE related to aluminium sheet
597
598 aal = 26.98;
599 zal = 13.;
600 densal = 2.7;
601 radlal = 8.9;
602
603 AliMaterial(1, "Air $", 14.61, 7.3, .001205, 30420., 67500);
604 AliMaterial(6, "HON", ahon, zhon, denshon, radlhon, 0);
605 AliMaterial(16, "CSI", ahon, zhon, denshon, radlhon, 0);
606 AliMixture(20, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
607 AliMixture(21, "QUAO", aquao, zquao, densquao, nlmatquao, wmatquao);
608 AliMixture(30, "FRE", afre, zfre, densfre, nlmatfre, wmatfre);
609 AliMixture(40, "MET", amet, zmet, densmet, nlmatmet, wmatmet);
610 AliMixture(41, "METG", amet, zmet, densmet, nlmatmet, wmatmet);
611 AliMaterial(11, "GRI", agri, zgri, densgri, radlgri, 0);
612 AliMaterial(50, "ALUM", aal, zal, densal, radlal, 0);
613
614 tmaxfd = -10.;
615 stemax = -.1;
616 deemax = -.2;
617 epsil = .001;
618 stmin = -.001;
619
620 AliMedium(1, "DEFAULT MEDIUM AIR$", 1, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
621 AliMedium(2, "HONEYCOMB$", 6, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
622 AliMedium(3, "QUARZO$", 20, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
623 AliMedium(4, "FREON$", 30, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
624 AliMedium(5, "METANO$", 40, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
625 AliMedium(6, "CSI$", 16, 1, ISXFLD, SXMGMX,tmaxfd, stemax, deemax, epsil, stmin);
626 AliMedium(7, "GRIGLIA$", 11, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
627 AliMedium(8, "QUARZOO$", 21, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
628 AliMedium(9, "GAP$", 41, 1, ISXFLD, SXMGMX,tmaxfd, .1, -deemax, epsil, -stmin);
629 AliMedium(10, "ALUMINUM$", 50, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
630
6e36c0f2 631
632 geant3->Gsckov(idtmed[1000], 26, ppckov, absco_methane, effic_all, rindex_methane);
633 geant3->Gsckov(idtmed[1001], 26, ppckov, absco_methane, effic_all, rindex_methane);
634 geant3->Gsckov(idtmed[1002], 26, ppckov, absco_quarz, effic_all,rindex_quarz);
635 geant3->Gsckov(idtmed[1003], 26, ppckov, absco_freon, effic_all,rindex_freon);
636 geant3->Gsckov(idtmed[1004], 26, ppckov, absco_methane, effic_all, rindex_methane);
637 geant3->Gsckov(idtmed[1005], 26, ppckov, absco_csi, effic_csi, rindex_methane);
638 geant3->Gsckov(idtmed[1006], 26, ppckov, absco_gri, effic_gri, rindex_gri);
639 geant3->Gsckov(idtmed[1007], 26, ppckov, absco_quarzo, effic_all, rindex_quarzo);
640 geant3->Gsckov(idtmed[1008], 26, ppckov, absco_methane, effic_all, rindex_methane);
641 geant3->Gsckov(idtmed[1009], 26, ppckov, absco_gri, effic_gri, rindex_gri);
642}
643
644//___________________________________________
645
646Float_t AliRICHv0::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)
647{
648
649 //ENE(EV), PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
650
651 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,
652 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,
653 7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
654
655
656 Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
657 2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
658 2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
659 1.72,1.53};
660
661 Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
662 0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
663 0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
664 1.714,1.498};
665 Float_t xe=ene;
666 Int_t j=Int_t(xe*10)-49;
667 Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
668 Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
669
670 //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
671 //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
672
673 Float_t sinin=TMath::Sqrt(1-pdoti*pdoti);
674 Float_t tanin=sinin/pdoti;
675
676 Float_t c1=cn*cn-ck*ck-sinin*sinin;
677 Float_t c2=4*cn*cn*ck*ck;
678 Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
679 Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
680
681 Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
682 Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
683
684
685 //CORRECTION FACTOR FOR SURFACE ROUGHNESS
686 //B.J. STAGG APPLIED OPTICS, 30(1991),4113
687
688 Float_t sigraf=18.;
689 Float_t lamb=1240/ene;
690 Float_t fresn;
691
692 Float_t rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
693
694 if(pola)
695 {
696 Float_t pdotr=0.8; //DEGREE OF POLARIZATION : 1->P , -1->S
697 fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
698 }
699 else
700 fresn=0.5*(rp+rs);
701
702 fresn = fresn*rO;
703 return(fresn);
704}
705
706//__________________________________________
707
708Float_t AliRICHv0::AbsoCH4(Float_t x)
709{
710
711 //LOSCH,SCH4(9),WL(9),EM(9),ALENGTH(31)
712 Float_t sch4[9] = {.12,.16,.23,.38,.86,2.8,7.9,28.,80.}; //MB X 10^22
713 //Float_t wl[9] = {153.,152.,151.,150.,149.,148.,147.,146.,145};
714 Float_t em[9] = {8.1,8.158,8.212,8.267,8.322,8.378,8.435,8.493,8.55};
715 const Float_t losch=2.686763E19; // LOSCHMIDT NUMBER IN CM-3
716 const Float_t igas1=100, igas2=0, oxy=10., wat=5., pre=750.,tem=283.;
717 Float_t pn=pre/760.;
718 Float_t tn=tem/273.16;
719
720
721// ------- METHANE CROSS SECTION -----------------
722// ASTROPH. J. 214, L47 (1978)
723
724 Float_t sm=0;
725 if (x<7.75)
726 sm=.06e-22;
727
728 if(x>=7.75 && x<=8.1)
729 {
730 Float_t c0=-1.655279e-1;
731 Float_t c1=6.307392e-2;
732 Float_t c2=-8.011441e-3;
733 Float_t c3=3.392126e-4;
734 sm=(c0+c1*x+c2*x*x+c3*x*x*x)*1.e-18;
735 }
736
737 if (x> 8.1)
738 {
739 Int_t j=0;
740 while (x<=em[j] && x>=em[j+1])
741 {
742 j++;
743 Float_t a=(sch4[j+1]-sch4[j])/(em[j+1]-em[j]);
744 sm=(sch4[j]+a*(x-em[j]))*1e-22;
745 }
746 }
747
748 Float_t dm=(igas1/100.)*(1.-((oxy+wat)/1.e6))*losch*pn/tn;
749 Float_t abslm=1./sm/dm;
ddae0931 750
6e36c0f2 751// ------- ISOBUTHANE CROSS SECTION --------------
752// i-C4H10 (ai) abs. length from curves in
753// Lu-McDonald paper for BARI RICH workshop .
754// -----------------------------------------------------------
755
756 Float_t ai;
757 Float_t absli;
758 if (igas2 != 0)
759 {
760 if (x<7.25)
761 ai=100000000.;
762
763 if(x>=7.25 && x<7.375)
764 ai=24.3;
765
766 if(x>=7.375)
767 ai=.0000000001;
768
769 Float_t si = 1./(ai*losch*273.16/293.); // ISOB. CRO.SEC.IN CM2
770 Float_t di=(igas2/100.)*(1.-((oxy+wat)/1.e6))*losch*pn/tn;
771 absli =1./si/di;
772 }
773 else
774 absli=1.e18;
775// ---------------------------------------------------------
776//
777// transmission of O2
778//
779// y= path in cm, x=energy in eV
780// so= cross section for UV absorption in cm2
781// do= O2 molecular density in cm-3
782// ---------------------------------------------------------
783
784 Float_t abslo;
785 Float_t so=0;
786 if(x>=6.0)
787 {
788 if(x>=6.0 && x<6.5)
789 {
790 so=3.392709e-13 * TMath::Exp(2.864104 *x);
791 so=so*1e-18;
792 }
793
794 if(x>=6.5 && x<7.0)
795 {
796 so=2.910039e-34 * TMath::Exp(10.3337*x);
797 so=so*1e-18;
798 }
799
800
801 if (x>=7.0)
802 {
803 Float_t a0=-73770.76;
804 Float_t a1=46190.69;
805 Float_t a2=-11475.44;
806 Float_t a3=1412.611;
807 Float_t a4=-86.07027;
808 Float_t a5=2.074234;
809 so= a0+(a1*x)+(a2*x*x)+(a3*x*x*x)+(a4*x*x*x*x)+(a5*x*x*x*x*x);
810 so=so*1e-18;
811 }
812
813 Float_t dox=(oxy/1e6)*losch*pn/tn;
814 abslo=1./so/dox;
815 }
816 else
817 abslo=1.e18;
818// ---------------------------------------------------------
819//
820// transmission of H2O
821//
822// y= path in cm, x=energy in eV
823// sw= cross section for UV absorption in cm2
824// dw= H2O molecular density in cm-3
825// ---------------------------------------------------------
826
827 Float_t abslw;
828
829 Float_t b0=29231.65;
830 Float_t b1=-15807.74;
831 Float_t b2=3192.926;
832 Float_t b3=-285.4809;
833 Float_t b4=9.533944;
834
835 if(x>6.75)
836 {
837 Float_t sw= b0+(b1*x)+(b2*x*x)+(b3*x*x*x)+(b4*x*x*x*x);
838 sw=sw*1e-18;
839 Float_t dw=(wat/1e6)*losch*pn/tn;
840 abslw=1./sw/dw;
841 }
842 else
843 abslw=1.e18;
844
845// ---------------------------------------------------------
846
847 Float_t alength=1./(1./abslm+1./absli+1./abslo+1./abslw);
848 return (alength);
ddae0931 849}
850
6e36c0f2 851
852
853
ddae0931 854//___________________________________________
855
856void AliRICHv0::Init()
857{
858 printf("\n\n\n Start Init for version 0 - CPC chamber type \n\n\n");
859
860 //
861 // Initialize Tracking Chambers
862 //
6e36c0f2 863 for (Int_t i=1; i<7; i++) {
864 //printf ("i:%d",i);
865 ( (AliRICHChamber*) (*fChambers)[i])->Init();
866 }
ddae0931 867
868 //
869 // Set the chamber (sensitive region) GEANT identifier
870
6e36c0f2 871 ((AliRICHChamber*)(*fChambers)[0])->SetGid(1);
872 ((AliRICHChamber*)(*fChambers)[1])->SetGid(2);
873 ((AliRICHChamber*)(*fChambers)[2])->SetGid(3);
874 ((AliRICHChamber*)(*fChambers)[3])->SetGid(4);
875 ((AliRICHChamber*)(*fChambers)[4])->SetGid(5);
876 ((AliRICHChamber*)(*fChambers)[5])->SetGid(6);
877 ((AliRICHChamber*)(*fChambers)[6])->SetGid(7);
878
879 Float_t pos1[3]={0,471.8999,165.2599};
880 Chamber(0).SetChamberTransform(pos1[0],pos1[1],pos1[2],new TRotMatrix("rot993","rot993",90,0,70.69,90,19.30999,-90));
881
882 Float_t pos2[3]={171,470,0};
883 Chamber(1).SetChamberTransform(pos2[0],pos2[1],pos2[2],new TRotMatrix("rot994","rot994",90,-20,90,70,0,0));
884
885 Float_t pos3[3]={0,500,0};
886 Chamber(2).SetChamberTransform(pos3[0],pos3[1],pos3[2],new TRotMatrix("rot995","rot995",90,0,90,90,0,0));
887
888 Float_t pos4[3]={-171,470,0};
889 Chamber(3).SetChamberTransform(pos4[0],pos4[1],pos4[2], new TRotMatrix("rot996","rot996",90,20,90,110,0,0));
890
891 Float_t pos5[3]={161.3999,443.3999,-165.3};
892 Chamber(4).SetChamberTransform(pos5[0],pos5[1],pos5[2],new TRotMatrix("rot997","rot997",90,340,108.1999,70,18.2,70));
893
894 Float_t pos6[3]={0., 471.9, -165.3,};
895 Chamber(5).SetChamberTransform(pos6[0],pos6[1],pos6[2],new TRotMatrix("rot998","rot998",90,0,109.3099,90,19.30999,90));
896
897 Float_t pos7[3]={-161.399,443.3999,-165.3};
898 Chamber(6).SetChamberTransform(pos7[0],pos7[1],pos7[2],new TRotMatrix("rot999","rot999",90,20,108.1999,110,18.2,110));
ddae0931 899
900 printf("\n\n\n Finished Init for version 0 - CPC chamber type\n\n\n");
901}
902
903//___________________________________________
904void AliRICHv0::StepManager()
905{
906 Int_t copy, id;
907 static Int_t idvol;
908 static Int_t vol[2];
909 Int_t ipart;
8140b37e 910 static Float_t hits[17];
911 static Float_t Ckov_data[17];
ddae0931 912 TLorentzVector Position;
913 TLorentzVector Momentum;
914 Float_t pos[3];
915 Float_t mom[4];
916 Float_t Localpos[3];
917 Float_t Localmom[4];
918 Float_t Localtheta,Localphi;
919 Float_t theta,phi;
920 Float_t destep, step;
6e36c0f2 921 Float_t ranf[2];
ddae0931 922 static Float_t eloss, xhit, yhit, tlength;
923 const Float_t big=1.e10;
6e36c0f2 924
ddae0931 925 TClonesArray &lhits = *fHits;
6e36c0f2 926 TGeant3 *geant3 = (TGeant3*) gMC;
927 TParticle *current = (TParticle*)(*gAlice->Particles())[gAlice->CurrentTrack()];
928
929 //if (current->Energy()>1)
930 //{
931
ddae0931 932 // Only gas gap inside chamber
933 // Tag chambers and record hits when track enters
934
935 idvol=-1;
936 id=gMC->CurrentVolID(copy);
6e36c0f2 937 Float_t cherenkov_loss=0;
938 //gAlice->KeepTrack(gAlice->CurrentTrack());
939
940 gMC->TrackPosition(Position);
941 pos[0]=Position(0);
942 pos[1]=Position(1);
943 pos[2]=Position(2);
944 Ckov_data[1] = pos[0]; // X-position for hit
945 Ckov_data[2] = pos[1]; // Y-position for hit
946 Ckov_data[3] = pos[2]; // Z-position for hit
947 //Ckov_data[11] = gAlice->CurrentTrack();
948
ddae0931 949
6e36c0f2 950 /********************Store production parameters for Cerenkov photons************************/
951//is it a Cerenkov photon?
952 if (gMC->TrackPid() == 50000050) {
953
954 //if (gMC->VolId("GAP ")==gMC->CurrentVolID(copy))
955
956
957 Float_t Ckov_energy = current->Energy();
958 //energy interval for tracking
959 if (Ckov_energy > 5.6e-09 && Ckov_energy < 7.8e-09 )
960 //if (Ckov_energy > 0)
961 {
962 if (gMC->IsTrackEntering()){ //is track entering?
963 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
964 { //is it in freo?
965 if (geant3->Gctrak()->nstep<1){ //is it the first step?
966 Int_t mother = current->GetFirstMother();
967
968 //printf("Second Mother:%d\n",current->GetSecondMother());
969
970 Ckov_data[10] = mother;
971 Ckov_data[11] = gAlice->CurrentTrack();
972 Ckov_data[12] = 1; //Media where photon was produced 1->Freon, 2->Quarz
973 fCkov_number++;
974 fFreon_prod=1;
975 //printf("Index: %d\n",fCkov_number);
976 } //first step question
977 } //freo question
978
979 if (geant3->Gctrak()->nstep<1){ //is it first step?
980 if (gMC->VolId("QUAR")==gMC->CurrentVolID(copy)) //is it in quarz?
981 {
982 Ckov_data[12] = 2;
983 } //quarz question
984 } //first step question
985
986 //printf("Before %d\n",fFreon_prod);
987 } //track entering question
988
989 if (Ckov_data[12] == 1) //was it produced in Freon?
990 //if (fFreon_prod == 1)
991 {
992 if (gMC->IsTrackEntering()){ //is track entering?
993 //printf("Got in");
994 if (gMC->VolId("META")==gMC->CurrentVolID(copy)) //is it in gap?
995 {
996 //printf("Got in\n");
997 gMC->TrackMomentum(Momentum);
998 mom[0]=Momentum(0);
999 mom[1]=Momentum(1);
1000 mom[2]=Momentum(2);
1001 mom[3]=Momentum(3);
1002 // Z-position for hit
1003
1004
1005 /**************** Photons lost in second grid have to be calculated by hand************/
1006
1007 Float_t cophi = TMath::Cos(TMath::ATan2(mom[0], mom[1]));
1008 Float_t t = (1. - .025 / cophi) * (1. - .05 / cophi);
1009 gMC->Rndm(ranf, 1);
1010 //printf("grid calculation:%f\n",t);
1011 if (ranf[0] > t) {
1012 geant3->StopTrack();
1013 Ckov_data[13] = 5;
1014 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1015 //printf("Lost one in grid\n");
1016 }
1017 /**********************************************************************************/
1018 } //gap
1019
1020 if (gMC->VolId("CSI ")==gMC->CurrentVolID(copy)) //is it in csi?
1021 {
1022 gMC->TrackMomentum(Momentum);
1023 mom[0]=Momentum(0);
1024 mom[1]=Momentum(1);
1025 mom[2]=Momentum(2);
1026 mom[3]=Momentum(3);
1027
1028 /********* Photons lost by Fresnel reflection have to be calculated by hand********/
1029 /***********************Cerenkov phtons (always polarised)*************************/
1030
1031 Float_t cophi = TMath::Cos(TMath::ATan2(mom[0], mom[1]));
1032 Float_t t = Fresnel(Ckov_energy*1e9,cophi,1);
1033 gMC->Rndm(ranf, 1);
1034 if (ranf[0] < t) {
1035 geant3->StopTrack();
1036 Ckov_data[13] = 6;
1037 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1038 //printf("Lost by Fresnel\n");
1039 }
1040 /**********************************************************************************/
1041 }
1042 } //track entering?
1043
1044
1045 /********************Evaluation of losses************************/
1046 /******************still in the old fashion**********************/
1047
1048 Int_t i1 = geant3->Gctrak()->nmec; //number of physics mechanisms acting on the particle
1049 for (Int_t i = 0; i < i1; ++i) {
1050 // Reflection loss
1051 if (geant3->Gctrak()->lmec[i] == 106) { //was it reflected
1052 Ckov_data[13]=10;
1053 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
1054 Ckov_data[13]=1;
1055 if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
1056 Ckov_data[13]=2;
1057 geant3->StopTrack();
1058 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1059 } //reflection question
1060
1061
1062 // Absorption loss
1063 else if (geant3->Gctrak()->lmec[i] == 101) { //was it absorbed?
1064 Ckov_data[13]=20;
1065 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
1066 Ckov_data[13]=11;
1067 if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
1068 Ckov_data[13]=12;
1069 if (gMC->CurrentVolID(copy) == gMC->VolId("META"))
1070 Ckov_data[13]=13;
1071 if (gMC->CurrentVolID(copy) == gMC->VolId("GAP "))
1072 Ckov_data[13]=13;
1073
1074 if (gMC->CurrentVolID(copy) == gMC->VolId("SRIC"))
1075 Ckov_data[13]=15;
1076
1077 // CsI inefficiency
1078 if (gMC->CurrentVolID(copy) == gMC->VolId("CSI ")) {
1079 Ckov_data[13]=16;
1080 }
1081 geant3->StopTrack();
1082 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1083 //printf("Added cerenkov %d\n",fCkov_number);
1084 } //absorption question
1085
1086
1087 // Photon goes out of tracking scope
1088 else if (geant3->Gctrak()->lmec[i] == 30) { //is it below energy treshold?
1089 Ckov_data[13]=21;
1090 geant3->StopTrack();
1091 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1092 } // energy treshold question
1093 } //number of mechanisms cycle
1094 /**********************End of evaluation************************/
1095 } //freon production question
1096 } //energy interval question
1097 } //cerenkov photon question
ddae0931 1098
6e36c0f2 1099 /**************************************End of Production Parameters Storing*********************/
1100
1101
1102 /*******************************Treat photons that hit the CsI (Ckovs and Feedbacks)************/
1103
1104 if (gMC->TrackPid() == 50000050 || gMC->TrackPid() == 50000051) {
ddae0931 1105 if (gMC->VolId("CSI ")==gMC->CurrentVolID(copy))
6e36c0f2 1106 {
1107
1108 if (gMC->Edep() > 0.){
1109 gMC->TrackPosition(Position);
1110 gMC->TrackMomentum(Momentum);
1111 pos[0]=Position(0);
1112 pos[1]=Position(1);
1113 pos[2]=Position(2);
1114 mom[0]=Momentum(0);
1115 mom[1]=Momentum(1);
1116 mom[2]=Momentum(2);
1117 mom[3]=Momentum(3);
1118 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
1119 Double_t rt = TMath::Sqrt(tc);
1120 theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
1121 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1122 gMC->Gmtod(pos,Localpos,1);
1123 gMC->Gmtod(mom,Localmom,2);
ddae0931 1124
6e36c0f2 1125 gMC->CurrentVolOffID(2,copy);
1126 vol[0]=copy;
1127 idvol=vol[0]-1;
1128
1129 //Int_t sector=((AliRICHChamber*) (*fChambers)[idvol])
1130 //->Sector(Localpos[0], Localpos[2]);
1131 //printf("Sector:%d\n",sector);
1132
1133 /*if (gMC->TrackPid() == 50000051){
1134 fFeedbacks++;
1135 printf("Feedbacks:%d\n",fFeedbacks);
1136 }*/
ddae0931 1137
6e36c0f2 1138 ((AliRICHChamber*) (*fChambers)[idvol])
1139 ->SigGenInit(Localpos[0], Localpos[2], Localpos[1]);
1140 if(idvol<7) {
1141 Ckov_data[0] = gMC->TrackPid(); // particle type
1142 Ckov_data[1] = pos[0]; // X-position for hit
1143 Ckov_data[2] = pos[1]; // Y-position for hit
1144 Ckov_data[3] = pos[2]; // Z-position for hit
1145 Ckov_data[4] = theta; // theta angle of incidence
1146 Ckov_data[5] = phi; // phi angle of incidence
1147 Ckov_data[8] = (Float_t) fNPadHits; // first padhit
1148 Ckov_data[9] = -1; // last pad hit
1149 Ckov_data[13] = 4; // photon was detected
1150 Ckov_data[14] = mom[0];
1151 Ckov_data[15] = mom[1];
1152 Ckov_data[16] = mom[2];
1153
1154 destep = gMC->Edep();
1155 gMC->SetMaxStep(big);
1156 cherenkov_loss += destep;
1157 Ckov_data[7]=cherenkov_loss;
1158
1159 MakePadHits(Localpos[0],Localpos[2],cherenkov_loss,idvol,cerenkov);
1160 if (fNPadHits > (Int_t)Ckov_data[8]) {
1161 Ckov_data[8]= Ckov_data[8]+1;
1162 Ckov_data[9]= (Float_t) fNPadHits;
1163 }
1164 //if (sector != -1)
1165 //{
1166 AddHit(gAlice->CurrentTrack(),vol,Ckov_data);
1167 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1168 //}
1169 }
ddae0931 1170 }
6e36c0f2 1171 }
1172 }
1173
1174 /***********************************************End of photon hits*********************************************/
1175
1176
1177 /**********************************************Charged particles treatment*************************************/
1178
1179 //else if (gMC->TrackCharge())
1180 else if (1 == 1)
1181 {
ddae0931 1182//If MIP
6e36c0f2 1183 /*if (gMC->IsTrackEntering())
1184 {
1185 hits[13]=20;//is track entering?
1186 }*/
1187 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
1188 {
1189 fFreon_prod=1;
1190 }
1191
ddae0931 1192 if (gMC->VolId("GAP ")== gMC->CurrentVolID(copy)) {
6e36c0f2 1193// Get current particle id (ipart), track position (pos) and momentum (mom)
1194
1195 gMC->CurrentVolOffID(3,copy);
1196 vol[0]=copy;
1197 idvol=vol[0]-1;
ddae0931 1198
6e36c0f2 1199 //Int_t sector=((AliRICHChamber*) (*fChambers)[idvol])
1200 //->Sector(Localpos[0], Localpos[2]);
1201 //printf("Sector:%d\n",sector);
1202
ddae0931 1203 gMC->TrackPosition(Position);
1204 gMC->TrackMomentum(Momentum);
1205 pos[0]=Position(0);
1206 pos[1]=Position(1);
1207 pos[2]=Position(2);
1208 mom[0]=Momentum(0);
1209 mom[1]=Momentum(1);
1210 mom[2]=Momentum(2);
1211 mom[3]=Momentum(3);
1212 gMC->Gmtod(pos,Localpos,1);
1213 gMC->Gmtod(mom,Localmom,2);
1214
1215 ipart = gMC->TrackPid();
1216 //
1217 // momentum loss and steplength in last step
1218 destep = gMC->Edep();
1219 step = gMC->TrackStep();
1220
1221 //
1222 // record hits when track enters ...
1223 if( gMC->IsTrackEntering()) {
6e36c0f2 1224// gMC->SetMaxStep(fMaxStepGas);
ddae0931 1225 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
1226 Double_t rt = TMath::Sqrt(tc);
1227 theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
1228 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1229
6e36c0f2 1230
1231 Double_t Localtc = Localmom[0]*Localmom[0]+Localmom[2]*Localmom[2];
1232 Double_t Localrt = TMath::Sqrt(Localtc);
1233 Localtheta = Float_t(TMath::ATan2(Localrt,Double_t(Localmom[1])))*kRaddeg;
1234 Localphi = Float_t(TMath::ATan2(Double_t(Localmom[2]),Double_t(Localmom[0])))*kRaddeg;
ddae0931 1235
1236 hits[0] = Float_t(ipart); // particle type
6e36c0f2 1237 hits[1] = Localpos[0]; // X-position for hit
1238 hits[2] = Localpos[1]; // Y-position for hit
1239 hits[3] = Localpos[2]; // Z-position for hit
1240 hits[4] = Localtheta; // theta angle of incidence
1241 hits[5] = Localphi; // phi angle of incidence
1242 hits[8] = (Float_t) fNPadHits; // first padhit
ddae0931 1243 hits[9] = -1; // last pad hit
6e36c0f2 1244 hits[13] = fFreon_prod; // did id hit the freon?
1245 hits[14] = mom[0];
1246 hits[15] = mom[1];
1247 hits[16] = mom[2];
1248
ddae0931 1249 tlength = 0;
1250 eloss = 0;
6e36c0f2 1251 fFreon_prod = 0;
1252
ddae0931 1253 Chamber(idvol).LocaltoGlobal(Localpos,hits+1);
6e36c0f2 1254
ddae0931 1255
1256 //To make chamber coordinates x-y had to pass LocalPos[0], LocalPos[2]
1257 xhit = Localpos[0];
1258 yhit = Localpos[2];
1259 // Only if not trigger chamber
1260 if(idvol<7) {
1261 //
1262 // Initialize hit position (cursor) in the segmentation model
6e36c0f2 1263 ((AliRICHChamber*) (*fChambers)[idvol])
ddae0931 1264 ->SigGenInit(Localpos[0], Localpos[2], Localpos[1]);
1265 }
1266 }
1267
1268 //
1269 // Calculate the charge induced on a pad (disintegration) in case
1270 //
1271 // Mip left chamber ...
1272 if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1273 gMC->SetMaxStep(big);
1274 eloss += destep;
1275 tlength += step;
1276
6e36c0f2 1277
ddae0931 1278 // Only if not trigger chamber
1279 if(idvol<7) {
1280 if (eloss > 0) MakePadHits(xhit,yhit,eloss,idvol,mip);
1281 }
1282
1283 hits[6]=tlength;
1284 hits[7]=eloss;
6e36c0f2 1285 if (fNPadHits > (Int_t)hits[8]) {
ddae0931 1286 hits[8]= hits[8]+1;
6e36c0f2 1287 hits[9]= (Float_t) fNPadHits;
ddae0931 1288 }
6e36c0f2 1289
1290 //if(sector !=-1)
1291 new(lhits[fNhits++]) AliRICHHit(fIshunt,gAlice->CurrentTrack(),vol,hits);
ddae0931 1292 eloss = 0;
1293 //
1294 // Check additional signal generation conditions
1295 // defined by the segmentation
1296 // model (boundary crossing conditions)
1297 } else if
6e36c0f2 1298 (((AliRICHChamber*) (*fChambers)[idvol])
ddae0931 1299 ->SigGenCond(Localpos[0], Localpos[2], Localpos[1]))
1300 {
6e36c0f2 1301 ((AliRICHChamber*) (*fChambers)[idvol])
ddae0931 1302 ->SigGenInit(Localpos[0], Localpos[2], Localpos[1]);
1303 if (eloss > 0) MakePadHits(xhit,yhit,eloss,idvol,mip);
1304 xhit = Localpos[0];
1305 yhit = Localpos[2];
1306 eloss = destep;
1307 tlength += step ;
1308 //
1309 // nothing special happened, add up energy loss
1310 } else {
1311 eloss += destep;
1312 tlength += step ;
1313 }
1314 }
6e36c0f2 1315 }
1316 /*************************************************End of MIP treatment**************************************/
1317 //}
ddae0931 1318}
1319
1320
1321//___________________________________________
1322void AliRICH::MakePadHits(Float_t xhit,Float_t yhit,Float_t eloss, Int_t idvol, Response_t res)
1323{
1324//
1325// Calls the charge disintegration method of the current chamber and adds
1326// the simulated cluster to the root treee
1327//
1328 Int_t clhits[7];
1329 Float_t newclust[6][500];
1330 Int_t nnew;
1331
1332//
1333// Integrated pulse height on chamber
1334
1335 clhits[0]=fNhits+1;
1336
6e36c0f2 1337 ((AliRICHChamber*) (*fChambers)[idvol])->DisIntegration(eloss, xhit, yhit, nnew, newclust, res);
ddae0931 1338 Int_t ic=0;
1339
1340//
1341// Add new clusters
1342 for (Int_t i=0; i<nnew; i++) {
1343 if (Int_t(newclust[3][i]) > 0) {
1344 ic++;
1345// Cathode plane
1346 clhits[1] = Int_t(newclust[5][i]);
1347// Cluster Charge
1348 clhits[2] = Int_t(newclust[0][i]);
1349// Pad: ix
1350 clhits[3] = Int_t(newclust[1][i]);
1351// Pad: iy
1352 clhits[4] = Int_t(newclust[2][i]);
1353// Pad: charge
1354 clhits[5] = Int_t(newclust[3][i]);
1355// Pad: chamber sector
1356 clhits[6] = Int_t(newclust[4][i]);
1357
6e36c0f2 1358 AddPadHit(clhits);
ddae0931 1359 }
1360 }
1361}