Move the check on z after z has been retrieved
[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 $Log$
6d31e556 18 Revision 1.6 2000/04/28 11:51:58 morsch
19 Dimensions of arrays hits and Ckov_data corrected.
20
8140b37e 21 Revision 1.5 2000/04/19 13:28:46 morsch
22 Major changes in geometry (parametrised), materials (updated) and
23 step manager (diagnostics) (JB, AM)
24
4c039060 25*/
26
6e36c0f2 27
28
29////////////////////////////////////////////////////////
ddae0931 30// Manager and hits classes for set:RICH version 0 //
31/////////////////////////////////////////////////////////
32
33#include <TTUBE.h>
34#include <TNode.h>
35#include <TRandom.h>
36
37#include "AliRICHv0.h"
38#include "AliRun.h"
39#include "AliMC.h"
40#include "iostream.h"
41#include "AliCallf77.h"
42#include "AliConst.h"
6e36c0f2 43#include "AliPDG.h"
ddae0931 44#include "TGeant3.h"
45
46ClassImp(AliRICHv0)
47
48//___________________________________________
49AliRICHv0::AliRICHv0() : AliRICH()
50{
6e36c0f2 51 //fChambers = 0;
ddae0931 52}
53
54//___________________________________________
55AliRICHv0::AliRICHv0(const char *name, const char *title)
56 : AliRICH(name,title)
57{
6e36c0f2 58 fCkov_number=0;
59 fFreon_prod=0;
60
ddae0931 61 fChambers = new TObjArray(7);
62 for (Int_t i=0; i<7; i++) {
63
6e36c0f2 64 (*fChambers)[i] = new AliRICHChamber();
ddae0931 65
6e36c0f2 66 }
ddae0931 67}
68
69
70//___________________________________________
71void AliRICHv0::CreateGeometry()
72{
73 //
74 // Create the geometry for RICH version 1
75 //
76 // Modified by: N. Colonna (INFN - BARI, Nicola.Colonna@ba.infn.it)
77 // R.A. Fini (INFN - BARI, Rosanna.Fini@ba.infn.it)
78 // R.A. Loconsole (Bari University, loco@riscom.ba.infn.it)
79 //
80 //Begin_Html
81 /*
82 <img src="picts/AliRICHv1.gif">
83 */
84 //End_Html
85 //Begin_Html
86 /*
87 <img src="picts/AliRICHv1Tree.gif">
88 */
89 //End_Html
6e36c0f2 90
91 AliRICH *RICH = (AliRICH *) gAlice->GetDetector("RICH");
92 AliRICHSegmentation* segmentation;
93 AliRICHGeometry* geometry;
94 AliRICHChamber* iChamber;
95
96 iChamber = &(RICH->Chamber(0));
97 segmentation=iChamber->GetSegmentationModel(0);
98 geometry=iChamber->GetGeometryModel();
6d31e556 99
100 Float_t distance;
101 distance = geometry->GetFreonThickness()/2 + geometry->GetQuartzThickness() + geometry->GetGapThickness();
102 geometry->SetRadiatorToPads(distance);
ddae0931 103
104
105 Int_t *idtmed = fIdtmed->GetArray()-999;
106
107 Int_t i;
108 Float_t zs;
109 Int_t idrotm[1099];
110 Float_t par[3];
111
112 // --- Define the RICH detector
113 // External aluminium box
114 par[0] = 71.1;
6e36c0f2 115 par[1] = 11.5; //Original Settings
ddae0931 116 par[2] = 73.15;
6e36c0f2 117 /*par[0] = 73.15;
118 par[1] = 11.5;
119 par[2] = 71.1;*/
ddae0931 120 gMC->Gsvolu("RICH", "BOX ", idtmed[1009], par, 3);
121
122 // Sensitive part of the whole RICH
123 par[0] = 64.8;
6e36c0f2 124 par[1] = 11.5; //Original Settings
ddae0931 125 par[2] = 66.55;
6e36c0f2 126 /*par[0] = 66.55;
127 par[1] = 11.5;
128 par[2] = 64.8;*/
ddae0931 129 gMC->Gsvolu("SRIC", "BOX ", idtmed[1000], par, 3);
130
131 // Honeycomb
132 par[0] = 63.1;
6e36c0f2 133 par[1] = .188; //Original Settings
ddae0931 134 par[2] = 66.55;
6e36c0f2 135 /*par[0] = 66.55;
136 par[1] = .188;
137 par[2] = 63.1;*/
ddae0931 138 gMC->Gsvolu("HONE", "BOX ", idtmed[1001], par, 3);
139
140 // Aluminium sheet
141 par[0] = 63.1;
6e36c0f2 142 par[1] = .025; //Original Settings
ddae0931 143 par[2] = 66.55;
6e36c0f2 144 /*par[0] = 66.5;
145 par[1] = .025;
146 par[2] = 63.1;*/
ddae0931 147 gMC->Gsvolu("ALUM", "BOX ", idtmed[1009], par, 3);
148
149 // Quartz
6e36c0f2 150 par[0] = geometry->GetQuartzWidth()/2;
151 par[1] = geometry->GetQuartzThickness()/2;
152 par[2] = geometry->GetQuartzLength()/2;
153 /*par[0] = 63.1;
154 par[1] = .25; //Original Settings
155 par[2] = 65.5;*/
156 /*par[0] = geometry->GetQuartzWidth()/2;
157 par[1] = geometry->GetQuartzThickness()/2;
158 par[2] = geometry->GetQuartzLength()/2;*/
159 //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 160 gMC->Gsvolu("QUAR", "BOX ", idtmed[1002], par, 3);
161
162 // Spacers (cylinders)
163 par[0] = 0.;
164 par[1] = .5;
6e36c0f2 165 par[2] = geometry->GetFreonThickness()/2;
ddae0931 166 gMC->Gsvolu("SPAC", "TUBE", idtmed[1002], par, 3);
167
168 // Opaque quartz
169 par[0] = 61.95;
6e36c0f2 170 par[1] = .2; //Original Settings
ddae0931 171 par[2] = 66.5;
6e36c0f2 172 /*par[0] = 66.5;
173 par[1] = .2;
174 par[2] = 61.95;*/
ddae0931 175 gMC->Gsvolu("OQUA", "BOX ", idtmed[1007], par, 3);
176
6e36c0f2 177 // Frame of opaque quartz
178 par[0] = geometry->GetOuterFreonWidth()/2;
179 par[1] = geometry->GetFreonThickness()/2;
180 par[2] = geometry->GetOuterFreonLength()/2 + 1;
181 /*par[0] = 20.65;
182 par[1] = .5; //Original Settings
183 par[2] = 66.5;*/
184 /*par[0] = 66.5;
ddae0931 185 par[1] = .5;
6e36c0f2 186 par[2] = 20.65;*/
187 gMC->Gsvolu("OQF1", "BOX ", idtmed[1007], par, 3);
188
189 par[0] = geometry->GetInnerFreonWidth()/2;
190 par[1] = geometry->GetFreonThickness()/2;
191 par[2] = geometry->GetInnerFreonLength()/2 + 1;
192 gMC->Gsvolu("OQF2", "BOX ", idtmed[1007], par, 3);
ddae0931 193
194 // Little bar of opaque quartz
6e36c0f2 195 par[0] = .275;
196 par[1] = geometry->GetQuartzThickness()/2;
197 par[2] = geometry->GetInnerFreonLength()/2 - 2.4;
198 /*par[0] = .275;
199 par[1] = .25; //Original Settings
200 par[2] = 63.1;*/
201 /*par[0] = 63.1;
ddae0931 202 par[1] = .25;
6e36c0f2 203 par[2] = .275;*/
ddae0931 204 gMC->Gsvolu("BARR", "BOX ", idtmed[1007], par, 3);
205
206 // Freon
6e36c0f2 207 par[0] = geometry->GetOuterFreonWidth()/2;
208 par[1] = geometry->GetFreonThickness()/2;
209 par[2] = geometry->GetOuterFreonLength()/2;
210 /*par[0] = 20.15;
211 par[1] = .5; //Original Settings
212 par[2] = 65.5;*/
213 /*par[0] = 65.5;
ddae0931 214 par[1] = .5;
6e36c0f2 215 par[2] = 20.15;*/
216 gMC->Gsvolu("FRE1", "BOX ", idtmed[1003], par, 3);
217
218 par[0] = geometry->GetInnerFreonWidth()/2;
219 par[1] = geometry->GetFreonThickness()/2;
220 par[2] = geometry->GetInnerFreonLength()/2;
221 gMC->Gsvolu("FRE2", "BOX ", idtmed[1003], par, 3);
ddae0931 222
223 // Methane
224 par[0] = 64.8;
6e36c0f2 225 par[1] = geometry->GetGapThickness()/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("META", "BOX ", idtmed[1004], par, 3);
229
230 // Methane gap
231 par[0] = 64.8;
6e36c0f2 232 par[1] = geometry->GetProximityGapThickness()/2;
233 //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 234 par[2] = 64.8;
235 gMC->Gsvolu("GAP ", "BOX ", idtmed[1008], par, 3);
236
237 // CsI photocathode
238 par[0] = 64.8;
239 par[1] = .25;
240 par[2] = 64.8;
241 gMC->Gsvolu("CSI ", "BOX ", idtmed[1005], par, 3);
242
243 // Anode grid
244 par[0] = 0.;
6e36c0f2 245 par[1] = .001;
ddae0931 246 par[2] = 20.;
247 gMC->Gsvolu("GRID", "TUBE", idtmed[1006], par, 3);
248
249 // --- Places the detectors defined with GSVOLU
250 // Place material inside RICH
251 gMC->Gspos("SRIC", 1, "RICH", 0., 0., 0., 0, "ONLY");
252
6e36c0f2 253 gMC->Gspos("ALUM", 1, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .4 -.05 - .376 -.025, 0., 0, "ONLY");
254 gMC->Gspos("HONE", 1, "SRIC", 0., 1.276- geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .4 -.05 - .188, 0., 0, "ONLY");
255 gMC->Gspos("ALUM", 2, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .4 - .025, 0., 0, "ONLY");
256 gMC->Gspos("OQUA", 1, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()- .2, 0., 0, "ONLY");
ddae0931 257
258 AliMatrix(idrotm[1019], 0., 0., 90., 0., 90., 90.);
259
6e36c0f2 260 Int_t nspacers = (Int_t)(TMath::Abs(geometry->GetInnerFreonLength()/14.4));
261 //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);
6d31e556 262
263 printf("Nspacers: %d", nspacers);
6e36c0f2 264
265 //for (i = 1; i <= 9; ++i) {
266 //zs = (5 - i) * 14.4; //Original settings
6d31e556 267 for (i = 0; i < nspacers; i++) {
6e36c0f2 268 zs = (TMath::Abs(nspacers/2) - i) * 14.4;
269 gMC->Gspos("SPAC", i, "FRE1", 6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
270 //gMC->Gspos("SPAC", i, "FRE1", zs, 0., 6.7, idrotm[1019], "ONLY");
ddae0931 271 }
6e36c0f2 272 //for (i = 10; i <= 18; ++i) {
273 //zs = (14 - i) * 14.4; //Original settings
274 for (i = nspacers; i < nspacers*2; ++i) {
275 zs = (nspacers + TMath::Abs(nspacers/2) - i) * 14.4;
276 gMC->Gspos("SPAC", i, "FRE1", -6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
277 //gMC->Gspos("SPAC", i, "FRE1", zs, 0., -6.7, idrotm[1019], "ONLY");
278 }
279
280 //for (i = 1; i <= 9; ++i) {
281 //zs = (5 - i) * 14.4; //Original settings
6d31e556 282 for (i = 0; i < nspacers; i++) {
6e36c0f2 283 zs = (TMath::Abs(nspacers/2) - i) * 14.4;
284 gMC->Gspos("SPAC", i, "FRE2", 6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
285 //gMC->Gspos("SPAC", i, "FRE2", zs, 0., 6.7, idrotm[1019], "ONLY");
286 }
287 //for (i = 10; i <= 18; ++i) {
288 //zs = (5 - i) * 14.4; //Original settings
289 for (i = nspacers; i < nspacers*2; ++i) {
290 zs = (nspacers + TMath::Abs(nspacers/2) - i) * 14.4;
291 gMC->Gspos("SPAC", i, "FRE2", -6.7, 0., zs, idrotm[1019], "ONLY"); //Original settings
292 //gMC->Gspos("SPAC", i, "FRE2", zs, 0., -6.7, idrotm[1019], "ONLY");
ddae0931 293 }
294
6e36c0f2 295 /*gMC->Gspos("FRE1", 1, "OQF1", 0., 0., 0., 0, "ONLY");
296 gMC->Gspos("FRE2", 1, "OQF2", 0., 0., 0., 0, "ONLY");
297 gMC->Gspos("OQF1", 1, "SRIC", 31.3, -4.724, 41.3, 0, "ONLY");
298 gMC->Gspos("OQF2", 2, "SRIC", 0., -4.724, 0., 0, "ONLY");
299 gMC->Gspos("OQF1", 3, "SRIC", -31.3, -4.724, -41.3, 0, "ONLY");
300 gMC->Gspos("BARR", 1, "QUAR", -21.65, 0., 0., 0, "ONLY"); //Original settings
301 gMC->Gspos("BARR", 2, "QUAR", 21.65, 0., 0., 0, "ONLY"); //Original settings
ddae0931 302 gMC->Gspos("QUAR", 1, "SRIC", 0., -3.974, 0., 0, "ONLY");
303 gMC->Gspos("GAP ", 1, "META", 0., 4.8, 0., 0, "ONLY");
304 gMC->Gspos("META", 1, "SRIC", 0., 1.276, 0., 0, "ONLY");
6e36c0f2 305 gMC->Gspos("CSI ", 1, "SRIC", 0., 6.526, 0., 0, "ONLY");*/
306
307
308 gMC->Gspos("FRE1", 1, "OQF1", 0., 0., 0., 0, "ONLY");
309 gMC->Gspos("FRE2", 1, "OQF2", 0., 0., 0., 0, "ONLY");
310 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)
311 gMC->Gspos("OQF2", 2, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness() - geometry->GetFreonThickness()/2, 0., 0, "ONLY"); //Original settings
312 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)
313 gMC->Gspos("BARR", 1, "QUAR", -21.65, 0., 0., 0, "ONLY"); //Original settings
314 gMC->Gspos("BARR", 2, "QUAR", 21.65, 0., 0., 0, "ONLY"); //Original settings
315 gMC->Gspos("QUAR", 1, "SRIC", 0., 1.276 - geometry->GetGapThickness()/2 - geometry->GetQuartzThickness()/2, 0., 0, "ONLY");
6d31e556 316 gMC->Gspos("GAP ", 1, "META", 0., geometry->GetGapThickness()/2 - geometry->GetProximityGapThickness()/2 - 0.0001, 0., 0, "ONLY");
6e36c0f2 317 gMC->Gspos("META", 1, "SRIC", 0., 1.276, 0., 0, "ONLY");
6d31e556 318 gMC->Gspos("CSI ", 1, "SRIC", 0., 1.276 + geometry->GetGapThickness()/2 + .25, 0., 0, "ONLY");
319
320 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);
ddae0931 321
322 // Place RICH inside ALICE apparatus
323
324 AliMatrix(idrotm[1000], 90., 0., 70.69, 90., 19.31, -90.);
325 AliMatrix(idrotm[1001], 90., -20., 90., 70., 0., 0.);
326 AliMatrix(idrotm[1002], 90., 0., 90., 90., 0., 0.);
327 AliMatrix(idrotm[1003], 90., 20., 90., 110., 0., 0.);
328 AliMatrix(idrotm[1004], 90., 340., 108.2, 70., 18.2, 70.);
329 AliMatrix(idrotm[1005], 90., 0., 109.31, 90., 19.31, 90.);
330 AliMatrix(idrotm[1006], 90., 20., 108.2, 110., 18.2, 110.);
331
332 gMC->Gspos("RICH", 1, "ALIC", 0., 471.9, 165.26, idrotm[1000], "ONLY");
333 gMC->Gspos("RICH", 2, "ALIC", 171., 470., 0., idrotm[1001], "ONLY");
334 gMC->Gspos("RICH", 3, "ALIC", 0., 500., 0., idrotm[1002], "ONLY");
335 gMC->Gspos("RICH", 4, "ALIC", -171., 470., 0., idrotm[1003], "ONLY");
336 gMC->Gspos("RICH", 5, "ALIC", 161.4, 443.4, -165.3, idrotm[1004], "ONLY");
337 gMC->Gspos("RICH", 6, "ALIC", 0., 471.9, -165.3, idrotm[1005], "ONLY");
338 gMC->Gspos("RICH", 7, "ALIC", -161.4, 443.4, -165.3, idrotm[1006], "ONLY");
339
340}
341
342
343//___________________________________________
344void AliRICHv0::CreateMaterials()
345{
346 //
347 // *** DEFINITION OF AVAILABLE RICH MATERIALS ***
348 // ORIGIN : NICK VAN EIJNDHOVEN
349 // Modified by: N. Colonna (INFN - BARI, Nicola.Colonna@ba.infn.it)
350 // R.A. Fini (INFN - BARI, Rosanna.Fini@ba.infn.it)
351 // R.A. Loconsole (Bari University, loco@riscom.ba.infn.it)
352 //
353 Int_t ISXFLD = gAlice->Field()->Integ();
354 Float_t SXMGMX = gAlice->Field()->Max();
6e36c0f2 355 Int_t i;
356
357 /************************************Antonnelo's Values (14-vectors)*****************************************/
358 /*
ddae0931 359 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,
360 6.7e-9,6.88e-9,7.08e-9,7.3e-9,7.51e-9,7.74e-9,8e-9 };
361 Float_t rindex_quarz[14] = { 1.528309,1.533333,
362 1.538243,1.544223,1.550568,1.55777,
363 1.565463,1.574765,1.584831,1.597027,
364 1.611858,1.6277,1.6472,1.6724 };
365 Float_t rindex_quarzo[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
366 Float_t rindex_methane[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
367 Float_t rindex_gri[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
368 Float_t absco_freon[14] = { 179.0987,179.0987,
6e36c0f2 369 179.0987,179.0987,179.0987,142.92,56.65,13.95,10.43,7.07,2.03,.5773,.33496,0. };
370 //Float_t absco_freon[14] = { 1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,
371 // 1e-5,1e-5,1e-5,1e-5,1e-5 };
372 Float_t absco_quarz[14] = { 64.035,39.98,35.665,31.262,27.527,22.815,21.04,17.52,
373 14.177,9.282,4.0925,1.149,.3627,.10857 };
ddae0931 374 Float_t absco_quarzo[14] = { 1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,1e-5,
375 1e-5,1e-5,1e-5,1e-5,1e-5 };
376 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,
377 1e-4,1e-4,1e-4,1e-4 };
378 Float_t absco_methane[14] = { 1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,1e6,
379 1e6,1e6,1e6 };
380 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,
381 1e-4,1e-4,1e-4,1e-4 };
382 Float_t effic_all[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
6e36c0f2 383 Float_t effic_csi[14] = { 6e-4,.005,.0075,.01125,.045,.117,.135,.16575,
384 .17425,.1785,.1836,.1904,.1938,.221 };
ddae0931 385 Float_t effic_gri[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
6e36c0f2 386 */
387
388
389 /**********************************End of Antonnelo's Values**********************************/
390
391 /**********************************Values from rich_media.f (31-vectors)**********************************/
392
393
394 //Photons energy intervals
395 Float_t ppckov[26];
396 for (i=0;i<26;i++)
397 {
398 ppckov[i] = (Float_t(i)*0.1+5.5)*1e-9;
399 //printf ("Energy intervals: %e\n",ppckov[i]);
400 }
401
402
403 //Refraction index for quarz
404 Float_t rindex_quarz[26];
405 Float_t e1= 10.666;
406 Float_t e2= 18.125;
407 Float_t f1= 46.411;
408 Float_t f2= 228.71;
409 for (i=0;i<26;i++)
410 {
411 Float_t ene=ppckov[i]*1e9;
412 Float_t a=f1/(e1*e1 - ene*ene);
413 Float_t b=f2/(e2*e2 - ene*ene);
414 rindex_quarz[i] = TMath::Sqrt(1. + a + b );
415 //printf ("Rindex_quarz: %e\n",rindex_quarz[i]);
416 }
417
418 //Refraction index for opaque quarz, methane and grid
419 Float_t rindex_quarzo[26];
420 Float_t rindex_methane[26];
421 Float_t rindex_gri[26];
422 for (i=0;i<26;i++)
423 {
424 rindex_quarzo[i]=1;
425 rindex_methane[i]=1.000444;
426 rindex_gri[i]=1;
427 //printf ("Rindex_quarzo , etc: %e, %e, %e\n",rindex_quarzo[i], rindex_methane[i], rindex_gri[i]=1);
428 }
429
430 //Absorption index for freon
431 Float_t absco_freon[26] = {179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987, 179.0987,
432 179.0987, 142.9206, 56.64957, 25.58622, 13.95293, 12.03905, 10.42953, 8.804196,
433 7.069031, 4.461292, 2.028366, 1.293013, .577267, .40746, .334964, 0., 0., 0.};
434
435 //Absorption index for quarz
436 /*Float_t Qzt [21] = {.0,.0,.005,.04,.35,.647,.769,.808,.829,.844,.853,.858,.869,.887,.903,.902,.902,
437 .906,.907,.907,.907};
438 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,
439 215.0,220.0,225.0,230.0,235.0,240.0,245.0,250.0};
440 Float_t absco_quarz[31];
441 for (Int_t i=0;i<31;i++)
442 {
443 Float_t Xlam = 1237.79 / (ppckov[i]*1e9);
444 if (Xlam <= 160) absco_quarz[i] = 0;
445 if (Xlam > 250) absco_quarz[i] = 1;
446 else
447 {
448 for (Int_t j=0;j<21;j++)
449 {
450 //printf ("Passed\n");
451 if (Xlam > Wavl2[j] && Xlam < Wavl2[j+1])
452 {
453 Float_t Dabs = (Qzt[j+1] - Qzt[j])/(Wavl2[j+1] - Wavl2[j]);
454 Float_t Abso = Qzt[j] + Dabs*(Xlam - Wavl2[j]);
455 absco_quarz[i] = -5.0/(TMath::Log(Abso));
456 }
457 }
458 }
459 printf ("Absco_quarz: %e Absco_freon: %e for energy: %e\n",absco_quarz[i],absco_freon[i],ppckov[i]);
460 }*/
461
462 /*Float_t absco_quarz[31] = {49.64211, 48.41296, 47.46989, 46.50492, 45.13682, 44.47883, 43.1929 , 41.30922, 40.5943 ,
463 39.82956, 38.98623, 38.6247 , 38.43448, 37.41084, 36.22575, 33.74852, 30.73901, 24.25086,
464 17.94531, 11.88753, 5.99128, 3.83503, 2.36661, 1.53155, 1.30582, 1.08574, .8779708,
465 .675275, 0., 0., 0.};
466
467 for (Int_t i=0;i<31;i++)
468 {
469 absco_quarz[i] = absco_quarz[i]/10;
470 }*/
471
472 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,
473 19.266, 17.525, 15.878, 14.177, 11.719, 9.282, 6.62, 4.0925, 2.601, 1.149, .667, .3627,
474 .192, .1497, .10857};
475
476 //Absorption index for methane
477 Float_t absco_methane[26];
478 for (i=0;i<26;i++)
479 {
480 absco_methane[i]=AbsoCH4(ppckov[i]*1e9);
481 //printf("Absco_methane: %e for energy: %e\n", absco_methane[i],ppckov[i]*1e9);
482 }
483
484 //Absorption index for opaque quarz, csi and grid, efficiency for all and grid
485 Float_t absco_quarzo[26];
486 Float_t absco_csi[26];
487 Float_t absco_gri[26];
488 Float_t effic_all[26];
489 Float_t effic_gri[26];
490 for (i=0;i<26;i++)
491 {
492 absco_quarzo[i]=1e-5;
493 absco_csi[i]=1e-4;
494 absco_gri[i]=1e-4;
495 effic_all[i]=1;
496 effic_gri[i]=1;
497 //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]);
498 }
499
500 //Efficiency for csi
501
502 Float_t effic_csi[26] = {0.000199999995, 0.000600000028, 0.000699999975, 0.00499999989, 0.00749999983, 0.010125,
503 0.0242999997, 0.0405000001, 0.0688500032, 0.105299994, 0.121500008, 0.141749993, 0.157949999,
504 0.162, 0.166050002, 0.167669997, 0.174299985, 0.176789999, 0.179279998, 0.182599992, 0.18592,
505 0.187579989, 0.189239994, 0.190899998, 0.207499996, 0.215799987};
506
507
508
509 //FRESNEL LOSS CORRECTION FOR PERPENDICULAR INCIDENCE AND
510 //UNPOLARIZED PHOTONS
511
512 for (i=0;i<26;i++)
513 {
514 effic_csi[i] = effic_csi[i]/(1.-Fresnel(ppckov[i]*1e9,1.,0));
515 //printf ("Fresnel result: %e for energy: %e\n",Fresnel(ppckov[i]*1e9,1.,0),ppckov[i]*1e9);
516 }
517
518 /*******************************************End of rich_media.f***************************************/
519
520
521
522
523
ddae0931 524
525 Float_t afre[2], agri, amet[2], aqua[2], ahon, zfre[2], zgri, zhon,
526 zmet[2], zqua[2];
527 Int_t nlmatfre;
528 Float_t densquao;
529 Int_t nlmatmet, nlmatqua;
6e36c0f2 530 Float_t wmatquao[2], rindex_freon[26];
ddae0931 531 Float_t aquao[2], epsil, stmin, zquao[2];
532 Int_t nlmatquao;
533 Float_t radlal, densal, tmaxfd, deemax, stemax;
534 Float_t aal, zal, radlgri, densfre, radlhon, densgri, denshon,densqua, densmet, wmatfre[2], wmatmet[2], wmatqua[2];
535
536 Int_t *idtmed = fIdtmed->GetArray()-999;
537
538 TGeant3 *geant3 = (TGeant3*) gMC;
539
540 // --- Photon energy (GeV)
541 // --- Refraction indexes
6e36c0f2 542 for (i = 0; i < 26; ++i) {
543 rindex_freon[i] = ppckov[i] * .0172 * 1e9 + 1.177;
544 //printf ("Rindex_freon: %e \n Effic_csi: %e for energy: %e\n",rindex_freon[i], effic_csi[i], ppckov[i]);
ddae0931 545 }
6e36c0f2 546
ddae0931 547 // --- Detection efficiencies (quantum efficiency for CsI)
548 // --- Define parameters for honeycomb.
549 // Used carbon of equivalent rad. lenght
550
551 ahon = 12.01;
552 zhon = 6.;
553 denshon = 2.265;
554 radlhon = 18.8;
555
556 // --- Parameters to include in GSMIXT, relative to Quarz (SiO2)
557
558 aqua[0] = 28.09;
559 aqua[1] = 16.;
560 zqua[0] = 14.;
561 zqua[1] = 8.;
562 densqua = 2.64;
563 nlmatqua = -2;
564 wmatqua[0] = 1.;
565 wmatqua[1] = 2.;
566
567 // --- Parameters to include in GSMIXT, relative to opaque Quarz (SiO2)
568
569 aquao[0] = 28.09;
570 aquao[1] = 16.;
571 zquao[0] = 14.;
572 zquao[1] = 8.;
573 densquao = 2.64;
574 nlmatquao = -2;
575 wmatquao[0] = 1.;
576 wmatquao[1] = 2.;
577
578 // --- Parameters to include in GSMIXT, relative to Freon (C6F14)
579
580 afre[0] = 12.;
581 afre[1] = 19.;
582 zfre[0] = 6.;
583 zfre[1] = 9.;
584 densfre = 1.7;
585 nlmatfre = -2;
586 wmatfre[0] = 6.;
587 wmatfre[1] = 14.;
588
589 // --- Parameters to include in GSMIXT, relative to methane (CH4)
590
591 amet[0] = 12.01;
592 amet[1] = 1.;
593 zmet[0] = 6.;
594 zmet[1] = 1.;
595 densmet = 7.17e-4;
596 nlmatmet = -2;
597 wmatmet[0] = 1.;
598 wmatmet[1] = 4.;
599
600 // --- Parameters to include in GSMIXT, relative to anode grid (Cu)
601
602 agri = 63.54;
603 zgri = 29.;
604 densgri = 8.96;
605 radlgri = 1.43;
606
607 // --- Parameters to include in GSMATE related to aluminium sheet
608
609 aal = 26.98;
610 zal = 13.;
611 densal = 2.7;
612 radlal = 8.9;
613
614 AliMaterial(1, "Air $", 14.61, 7.3, .001205, 30420., 67500);
615 AliMaterial(6, "HON", ahon, zhon, denshon, radlhon, 0);
616 AliMaterial(16, "CSI", ahon, zhon, denshon, radlhon, 0);
617 AliMixture(20, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
618 AliMixture(21, "QUAO", aquao, zquao, densquao, nlmatquao, wmatquao);
619 AliMixture(30, "FRE", afre, zfre, densfre, nlmatfre, wmatfre);
620 AliMixture(40, "MET", amet, zmet, densmet, nlmatmet, wmatmet);
621 AliMixture(41, "METG", amet, zmet, densmet, nlmatmet, wmatmet);
622 AliMaterial(11, "GRI", agri, zgri, densgri, radlgri, 0);
623 AliMaterial(50, "ALUM", aal, zal, densal, radlal, 0);
624
625 tmaxfd = -10.;
626 stemax = -.1;
627 deemax = -.2;
628 epsil = .001;
629 stmin = -.001;
630
631 AliMedium(1, "DEFAULT MEDIUM AIR$", 1, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
632 AliMedium(2, "HONEYCOMB$", 6, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
633 AliMedium(3, "QUARZO$", 20, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
634 AliMedium(4, "FREON$", 30, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
635 AliMedium(5, "METANO$", 40, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
636 AliMedium(6, "CSI$", 16, 1, ISXFLD, SXMGMX,tmaxfd, stemax, deemax, epsil, stmin);
637 AliMedium(7, "GRIGLIA$", 11, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
638 AliMedium(8, "QUARZOO$", 21, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
639 AliMedium(9, "GAP$", 41, 1, ISXFLD, SXMGMX,tmaxfd, .1, -deemax, epsil, -stmin);
640 AliMedium(10, "ALUMINUM$", 50, 1, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
641
6e36c0f2 642
643 geant3->Gsckov(idtmed[1000], 26, ppckov, absco_methane, effic_all, rindex_methane);
644 geant3->Gsckov(idtmed[1001], 26, ppckov, absco_methane, effic_all, rindex_methane);
645 geant3->Gsckov(idtmed[1002], 26, ppckov, absco_quarz, effic_all,rindex_quarz);
646 geant3->Gsckov(idtmed[1003], 26, ppckov, absco_freon, effic_all,rindex_freon);
647 geant3->Gsckov(idtmed[1004], 26, ppckov, absco_methane, effic_all, rindex_methane);
648 geant3->Gsckov(idtmed[1005], 26, ppckov, absco_csi, effic_csi, rindex_methane);
649 geant3->Gsckov(idtmed[1006], 26, ppckov, absco_gri, effic_gri, rindex_gri);
650 geant3->Gsckov(idtmed[1007], 26, ppckov, absco_quarzo, effic_all, rindex_quarzo);
651 geant3->Gsckov(idtmed[1008], 26, ppckov, absco_methane, effic_all, rindex_methane);
652 geant3->Gsckov(idtmed[1009], 26, ppckov, absco_gri, effic_gri, rindex_gri);
653}
654
655//___________________________________________
656
657Float_t AliRICHv0::Fresnel(Float_t ene,Float_t pdoti, Bool_t pola)
658{
659
660 //ENE(EV), PDOTI=COS(INC.ANG.), PDOTR=COS(POL.PLANE ROT.ANG.)
661
662 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,
663 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,
664 7.8,7.9,8.0,8.1,8.2,8.3,8.4,8.5};
665
666
667 Float_t csin[36] = {2.14,2.21,2.33,2.48,2.76,2.97,2.99,2.59,2.81,3.05,
668 2.86,2.53,2.55,2.66,2.79,2.96,3.18,3.05,2.84,2.81,2.38,2.11,
669 2.01,2.13,2.39,2.73,3.08,3.15,2.95,2.73,2.56,2.41,2.12,1.95,
670 1.72,1.53};
671
672 Float_t csik[36] = {0.,0.,0.,0.,0.,0.196,0.408,0.208,0.118,0.49,0.784,0.543,
673 0.424,0.404,0.371,0.514,0.922,1.102,1.139,1.376,1.461,1.253,0.878,
674 0.69,0.612,0.649,0.824,1.347,1.571,1.678,1.763,1.857,1.824,1.824,
675 1.714,1.498};
676 Float_t xe=ene;
677 Int_t j=Int_t(xe*10)-49;
678 Float_t cn=csin[j]+((csin[j+1]-csin[j])/0.1)*(xe-en[j]);
679 Float_t ck=csik[j]+((csik[j+1]-csik[j])/0.1)*(xe-en[j]);
680
681 //FORMULAE FROM HANDBOOK OF OPTICS, 33.23 OR
682 //W.R. HUNTER, J.O.S.A. 54 (1964),15 , J.O.S.A. 55(1965),1197
683
684 Float_t sinin=TMath::Sqrt(1-pdoti*pdoti);
685 Float_t tanin=sinin/pdoti;
686
687 Float_t c1=cn*cn-ck*ck-sinin*sinin;
688 Float_t c2=4*cn*cn*ck*ck;
689 Float_t aO=TMath::Sqrt(0.5*(TMath::Sqrt(c1*c1+c2)+c1));
690 Float_t b2=0.5*(TMath::Sqrt(c1*c1+c2)-c1);
691
692 Float_t rs=((aO-pdoti)*(aO-pdoti)+b2)/((aO+pdoti)*(aO+pdoti)+b2);
693 Float_t rp=rs*((aO-sinin*tanin)*(aO-sinin*tanin)+b2)/((aO+sinin*tanin)*(aO+sinin*tanin)+b2);
694
695
696 //CORRECTION FACTOR FOR SURFACE ROUGHNESS
697 //B.J. STAGG APPLIED OPTICS, 30(1991),4113
698
699 Float_t sigraf=18.;
700 Float_t lamb=1240/ene;
701 Float_t fresn;
702
703 Float_t rO=TMath::Exp(-(4*TMath::Pi()*pdoti*sigraf/lamb)*(4*TMath::Pi()*pdoti*sigraf/lamb));
704
705 if(pola)
706 {
707 Float_t pdotr=0.8; //DEGREE OF POLARIZATION : 1->P , -1->S
708 fresn=0.5*(rp*(1+pdotr)+rs*(1-pdotr));
709 }
710 else
711 fresn=0.5*(rp+rs);
712
713 fresn = fresn*rO;
714 return(fresn);
715}
716
717//__________________________________________
718
719Float_t AliRICHv0::AbsoCH4(Float_t x)
720{
721
722 //LOSCH,SCH4(9),WL(9),EM(9),ALENGTH(31)
723 Float_t sch4[9] = {.12,.16,.23,.38,.86,2.8,7.9,28.,80.}; //MB X 10^22
724 //Float_t wl[9] = {153.,152.,151.,150.,149.,148.,147.,146.,145};
725 Float_t em[9] = {8.1,8.158,8.212,8.267,8.322,8.378,8.435,8.493,8.55};
726 const Float_t losch=2.686763E19; // LOSCHMIDT NUMBER IN CM-3
727 const Float_t igas1=100, igas2=0, oxy=10., wat=5., pre=750.,tem=283.;
728 Float_t pn=pre/760.;
729 Float_t tn=tem/273.16;
730
731
732// ------- METHANE CROSS SECTION -----------------
733// ASTROPH. J. 214, L47 (1978)
734
735 Float_t sm=0;
736 if (x<7.75)
737 sm=.06e-22;
738
739 if(x>=7.75 && x<=8.1)
740 {
741 Float_t c0=-1.655279e-1;
742 Float_t c1=6.307392e-2;
743 Float_t c2=-8.011441e-3;
744 Float_t c3=3.392126e-4;
745 sm=(c0+c1*x+c2*x*x+c3*x*x*x)*1.e-18;
746 }
747
748 if (x> 8.1)
749 {
750 Int_t j=0;
751 while (x<=em[j] && x>=em[j+1])
752 {
753 j++;
754 Float_t a=(sch4[j+1]-sch4[j])/(em[j+1]-em[j]);
755 sm=(sch4[j]+a*(x-em[j]))*1e-22;
756 }
757 }
758
759 Float_t dm=(igas1/100.)*(1.-((oxy+wat)/1.e6))*losch*pn/tn;
760 Float_t abslm=1./sm/dm;
ddae0931 761
6e36c0f2 762// ------- ISOBUTHANE CROSS SECTION --------------
763// i-C4H10 (ai) abs. length from curves in
764// Lu-McDonald paper for BARI RICH workshop .
765// -----------------------------------------------------------
766
767 Float_t ai;
768 Float_t absli;
769 if (igas2 != 0)
770 {
771 if (x<7.25)
772 ai=100000000.;
773
774 if(x>=7.25 && x<7.375)
775 ai=24.3;
776
777 if(x>=7.375)
778 ai=.0000000001;
779
780 Float_t si = 1./(ai*losch*273.16/293.); // ISOB. CRO.SEC.IN CM2
781 Float_t di=(igas2/100.)*(1.-((oxy+wat)/1.e6))*losch*pn/tn;
782 absli =1./si/di;
783 }
784 else
785 absli=1.e18;
786// ---------------------------------------------------------
787//
788// transmission of O2
789//
790// y= path in cm, x=energy in eV
791// so= cross section for UV absorption in cm2
792// do= O2 molecular density in cm-3
793// ---------------------------------------------------------
794
795 Float_t abslo;
796 Float_t so=0;
797 if(x>=6.0)
798 {
799 if(x>=6.0 && x<6.5)
800 {
801 so=3.392709e-13 * TMath::Exp(2.864104 *x);
802 so=so*1e-18;
803 }
804
805 if(x>=6.5 && x<7.0)
806 {
807 so=2.910039e-34 * TMath::Exp(10.3337*x);
808 so=so*1e-18;
809 }
810
811
812 if (x>=7.0)
813 {
814 Float_t a0=-73770.76;
815 Float_t a1=46190.69;
816 Float_t a2=-11475.44;
817 Float_t a3=1412.611;
818 Float_t a4=-86.07027;
819 Float_t a5=2.074234;
820 so= a0+(a1*x)+(a2*x*x)+(a3*x*x*x)+(a4*x*x*x*x)+(a5*x*x*x*x*x);
821 so=so*1e-18;
822 }
823
824 Float_t dox=(oxy/1e6)*losch*pn/tn;
825 abslo=1./so/dox;
826 }
827 else
828 abslo=1.e18;
829// ---------------------------------------------------------
830//
831// transmission of H2O
832//
833// y= path in cm, x=energy in eV
834// sw= cross section for UV absorption in cm2
835// dw= H2O molecular density in cm-3
836// ---------------------------------------------------------
837
838 Float_t abslw;
839
840 Float_t b0=29231.65;
841 Float_t b1=-15807.74;
842 Float_t b2=3192.926;
843 Float_t b3=-285.4809;
844 Float_t b4=9.533944;
845
846 if(x>6.75)
847 {
848 Float_t sw= b0+(b1*x)+(b2*x*x)+(b3*x*x*x)+(b4*x*x*x*x);
849 sw=sw*1e-18;
850 Float_t dw=(wat/1e6)*losch*pn/tn;
851 abslw=1./sw/dw;
852 }
853 else
854 abslw=1.e18;
855
856// ---------------------------------------------------------
857
858 Float_t alength=1./(1./abslm+1./absli+1./abslo+1./abslw);
859 return (alength);
ddae0931 860}
861
6e36c0f2 862
863
864
ddae0931 865//___________________________________________
866
867void AliRICHv0::Init()
868{
869 printf("\n\n\n Start Init for version 0 - CPC chamber type \n\n\n");
870
871 //
872 // Initialize Tracking Chambers
873 //
6e36c0f2 874 for (Int_t i=1; i<7; i++) {
875 //printf ("i:%d",i);
876 ( (AliRICHChamber*) (*fChambers)[i])->Init();
877 }
ddae0931 878
879 //
880 // Set the chamber (sensitive region) GEANT identifier
881
6e36c0f2 882 ((AliRICHChamber*)(*fChambers)[0])->SetGid(1);
883 ((AliRICHChamber*)(*fChambers)[1])->SetGid(2);
884 ((AliRICHChamber*)(*fChambers)[2])->SetGid(3);
885 ((AliRICHChamber*)(*fChambers)[3])->SetGid(4);
886 ((AliRICHChamber*)(*fChambers)[4])->SetGid(5);
887 ((AliRICHChamber*)(*fChambers)[5])->SetGid(6);
888 ((AliRICHChamber*)(*fChambers)[6])->SetGid(7);
889
890 Float_t pos1[3]={0,471.8999,165.2599};
891 Chamber(0).SetChamberTransform(pos1[0],pos1[1],pos1[2],new TRotMatrix("rot993","rot993",90,0,70.69,90,19.30999,-90));
892
893 Float_t pos2[3]={171,470,0};
894 Chamber(1).SetChamberTransform(pos2[0],pos2[1],pos2[2],new TRotMatrix("rot994","rot994",90,-20,90,70,0,0));
895
896 Float_t pos3[3]={0,500,0};
897 Chamber(2).SetChamberTransform(pos3[0],pos3[1],pos3[2],new TRotMatrix("rot995","rot995",90,0,90,90,0,0));
898
899 Float_t pos4[3]={-171,470,0};
900 Chamber(3).SetChamberTransform(pos4[0],pos4[1],pos4[2], new TRotMatrix("rot996","rot996",90,20,90,110,0,0));
901
902 Float_t pos5[3]={161.3999,443.3999,-165.3};
903 Chamber(4).SetChamberTransform(pos5[0],pos5[1],pos5[2],new TRotMatrix("rot997","rot997",90,340,108.1999,70,18.2,70));
904
905 Float_t pos6[3]={0., 471.9, -165.3,};
906 Chamber(5).SetChamberTransform(pos6[0],pos6[1],pos6[2],new TRotMatrix("rot998","rot998",90,0,109.3099,90,19.30999,90));
907
908 Float_t pos7[3]={-161.399,443.3999,-165.3};
909 Chamber(6).SetChamberTransform(pos7[0],pos7[1],pos7[2],new TRotMatrix("rot999","rot999",90,20,108.1999,110,18.2,110));
ddae0931 910
911 printf("\n\n\n Finished Init for version 0 - CPC chamber type\n\n\n");
912}
913
914//___________________________________________
915void AliRICHv0::StepManager()
916{
917 Int_t copy, id;
918 static Int_t idvol;
919 static Int_t vol[2];
920 Int_t ipart;
8140b37e 921 static Float_t hits[17];
922 static Float_t Ckov_data[17];
ddae0931 923 TLorentzVector Position;
924 TLorentzVector Momentum;
925 Float_t pos[3];
926 Float_t mom[4];
927 Float_t Localpos[3];
928 Float_t Localmom[4];
929 Float_t Localtheta,Localphi;
930 Float_t theta,phi;
931 Float_t destep, step;
6e36c0f2 932 Float_t ranf[2];
6d31e556 933 Int_t NPads;
ddae0931 934 static Float_t eloss, xhit, yhit, tlength;
935 const Float_t big=1.e10;
6e36c0f2 936
ddae0931 937 TClonesArray &lhits = *fHits;
6e36c0f2 938 TGeant3 *geant3 = (TGeant3*) gMC;
939 TParticle *current = (TParticle*)(*gAlice->Particles())[gAlice->CurrentTrack()];
940
941 //if (current->Energy()>1)
942 //{
943
ddae0931 944 // Only gas gap inside chamber
945 // Tag chambers and record hits when track enters
946
947 idvol=-1;
948 id=gMC->CurrentVolID(copy);
6e36c0f2 949 Float_t cherenkov_loss=0;
950 //gAlice->KeepTrack(gAlice->CurrentTrack());
951
952 gMC->TrackPosition(Position);
953 pos[0]=Position(0);
954 pos[1]=Position(1);
955 pos[2]=Position(2);
956 Ckov_data[1] = pos[0]; // X-position for hit
957 Ckov_data[2] = pos[1]; // Y-position for hit
958 Ckov_data[3] = pos[2]; // Z-position for hit
959 //Ckov_data[11] = gAlice->CurrentTrack();
960
ddae0931 961
6e36c0f2 962 /********************Store production parameters for Cerenkov photons************************/
963//is it a Cerenkov photon?
964 if (gMC->TrackPid() == 50000050) {
965
966 //if (gMC->VolId("GAP ")==gMC->CurrentVolID(copy))
6d31e556 967 //{
968 Float_t Ckov_energy = current->Energy();
969 //energy interval for tracking
970 if (Ckov_energy > 5.6e-09 && Ckov_energy < 7.8e-09 )
971 //if (Ckov_energy > 0)
972 {
973 if (gMC->IsTrackEntering()){ //is track entering?
6e36c0f2 974 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
975 { //is it in freo?
976 if (geant3->Gctrak()->nstep<1){ //is it the first step?
6d31e556 977 Int_t mother = current->GetFirstMother();
978
979 //printf("Second Mother:%d\n",current->GetSecondMother());
980
981 Ckov_data[10] = mother;
982 Ckov_data[11] = gAlice->CurrentTrack();
983 Ckov_data[12] = 1; //Media where photon was produced 1->Freon, 2->Quarz
984 fCkov_number++;
985 fFreon_prod=1;
986 //printf("Index: %d\n",fCkov_number);
6e36c0f2 987 } //first step question
6d31e556 988 } //freo question
6e36c0f2 989
990 if (geant3->Gctrak()->nstep<1){ //is it first step?
6d31e556 991 if (gMC->VolId("QUAR")==gMC->CurrentVolID(copy)) //is it in quarz?
6e36c0f2 992 {
6d31e556 993 Ckov_data[12] = 2;
6e36c0f2 994 } //quarz question
995 } //first step question
996
997 //printf("Before %d\n",fFreon_prod);
6d31e556 998 } //track entering question
999
1000 if (Ckov_data[12] == 1) //was it produced in Freon?
6e36c0f2 1001 //if (fFreon_prod == 1)
6d31e556 1002 {
1003 if (gMC->IsTrackEntering()){ //is track entering?
6e36c0f2 1004 //printf("Got in");
1005 if (gMC->VolId("META")==gMC->CurrentVolID(copy)) //is it in gap?
6d31e556 1006 {
6e36c0f2 1007 //printf("Got in\n");
1008 gMC->TrackMomentum(Momentum);
1009 mom[0]=Momentum(0);
1010 mom[1]=Momentum(1);
1011 mom[2]=Momentum(2);
1012 mom[3]=Momentum(3);
6d31e556 1013 // Z-position for hit
1014
1015
6e36c0f2 1016 /**************** Photons lost in second grid have to be calculated by hand************/
6d31e556 1017
6e36c0f2 1018 Float_t cophi = TMath::Cos(TMath::ATan2(mom[0], mom[1]));
1019 Float_t t = (1. - .025 / cophi) * (1. - .05 / cophi);
1020 gMC->Rndm(ranf, 1);
1021 //printf("grid calculation:%f\n",t);
1022 if (ranf[0] > t) {
6d31e556 1023 geant3->StopTrack();
1024 Ckov_data[13] = 5;
1025 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1026 //printf("Lost one in grid\n");
6e36c0f2 1027 }
1028 /**********************************************************************************/
6d31e556 1029 } //gap
6e36c0f2 1030
1031 if (gMC->VolId("CSI ")==gMC->CurrentVolID(copy)) //is it in csi?
6d31e556 1032 {
6e36c0f2 1033 gMC->TrackMomentum(Momentum);
1034 mom[0]=Momentum(0);
1035 mom[1]=Momentum(1);
1036 mom[2]=Momentum(2);
1037 mom[3]=Momentum(3);
1038
1039 /********* Photons lost by Fresnel reflection have to be calculated by hand********/
1040 /***********************Cerenkov phtons (always polarised)*************************/
1041
1042 Float_t cophi = TMath::Cos(TMath::ATan2(mom[0], mom[1]));
1043 Float_t t = Fresnel(Ckov_energy*1e9,cophi,1);
1044 gMC->Rndm(ranf, 1);
1045 if (ranf[0] < t) {
6d31e556 1046 geant3->StopTrack();
1047 Ckov_data[13] = 6;
1048 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1049 //printf("Lost by Fresnel\n");
6e36c0f2 1050 }
6d31e556 1051 /**********************************************************************************/
1052 }
1053 } //track entering?
1054
1055
1056 /********************Evaluation of losses************************/
1057 /******************still in the old fashion**********************/
1058
1059 Int_t i1 = geant3->Gctrak()->nmec; //number of physics mechanisms acting on the particle
1060 for (Int_t i = 0; i < i1; ++i) {
6e36c0f2 1061 // Reflection loss
1062 if (geant3->Gctrak()->lmec[i] == 106) { //was it reflected
6d31e556 1063 Ckov_data[13]=10;
1064 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
1065 Ckov_data[13]=1;
1066 if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
1067 Ckov_data[13]=2;
1068 geant3->StopTrack();
1069 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
6e36c0f2 1070 } //reflection question
1071
6d31e556 1072
6e36c0f2 1073 // Absorption loss
1074 else if (geant3->Gctrak()->lmec[i] == 101) { //was it absorbed?
6d31e556 1075 Ckov_data[13]=20;
1076 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
1077 Ckov_data[13]=11;
1078 if (gMC->CurrentVolID(copy) == gMC->VolId("QUAR"))
1079 Ckov_data[13]=12;
1080 if (gMC->CurrentVolID(copy) == gMC->VolId("META"))
1081 Ckov_data[13]=13;
1082 if (gMC->CurrentVolID(copy) == gMC->VolId("GAP "))
1083 Ckov_data[13]=13;
1084
1085 if (gMC->CurrentVolID(copy) == gMC->VolId("SRIC"))
1086 Ckov_data[13]=15;
1087
1088 // CsI inefficiency
1089 if (gMC->CurrentVolID(copy) == gMC->VolId("CSI ")) {
1090 Ckov_data[13]=16;
1091 }
1092 geant3->StopTrack();
1093 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1094 //printf("Added cerenkov %d\n",fCkov_number);
6e36c0f2 1095 } //absorption question
1096
6d31e556 1097
6e36c0f2 1098 // Photon goes out of tracking scope
1099 else if (geant3->Gctrak()->lmec[i] == 30) { //is it below energy treshold?
6d31e556 1100 Ckov_data[13]=21;
1101 geant3->StopTrack();
1102 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
6e36c0f2 1103 } // energy treshold question
6d31e556 1104 } //number of mechanisms cycle
1105 /**********************End of evaluation************************/
1106 } //freon production question
1107 } //energy interval question
1108 //}//inside the proximity gap question
6e36c0f2 1109 } //cerenkov photon question
6d31e556 1110
6e36c0f2 1111 /**************************************End of Production Parameters Storing*********************/
1112
1113
1114 /*******************************Treat photons that hit the CsI (Ckovs and Feedbacks)************/
1115
1116 if (gMC->TrackPid() == 50000050 || gMC->TrackPid() == 50000051) {
6d31e556 1117 //printf("Cerenkov\n");
ddae0931 1118 if (gMC->VolId("CSI ")==gMC->CurrentVolID(copy))
6e36c0f2 1119 {
1120
1121 if (gMC->Edep() > 0.){
1122 gMC->TrackPosition(Position);
1123 gMC->TrackMomentum(Momentum);
1124 pos[0]=Position(0);
1125 pos[1]=Position(1);
1126 pos[2]=Position(2);
1127 mom[0]=Momentum(0);
1128 mom[1]=Momentum(1);
1129 mom[2]=Momentum(2);
1130 mom[3]=Momentum(3);
1131 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
1132 Double_t rt = TMath::Sqrt(tc);
1133 theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
1134 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1135 gMC->Gmtod(pos,Localpos,1);
1136 gMC->Gmtod(mom,Localmom,2);
ddae0931 1137
6e36c0f2 1138 gMC->CurrentVolOffID(2,copy);
1139 vol[0]=copy;
1140 idvol=vol[0]-1;
1141
1142 //Int_t sector=((AliRICHChamber*) (*fChambers)[idvol])
1143 //->Sector(Localpos[0], Localpos[2]);
1144 //printf("Sector:%d\n",sector);
1145
1146 /*if (gMC->TrackPid() == 50000051){
1147 fFeedbacks++;
1148 printf("Feedbacks:%d\n",fFeedbacks);
1149 }*/
ddae0931 1150
6e36c0f2 1151 ((AliRICHChamber*) (*fChambers)[idvol])
1152 ->SigGenInit(Localpos[0], Localpos[2], Localpos[1]);
1153 if(idvol<7) {
1154 Ckov_data[0] = gMC->TrackPid(); // particle type
1155 Ckov_data[1] = pos[0]; // X-position for hit
1156 Ckov_data[2] = pos[1]; // Y-position for hit
1157 Ckov_data[3] = pos[2]; // Z-position for hit
1158 Ckov_data[4] = theta; // theta angle of incidence
1159 Ckov_data[5] = phi; // phi angle of incidence
1160 Ckov_data[8] = (Float_t) fNPadHits; // first padhit
1161 Ckov_data[9] = -1; // last pad hit
1162 Ckov_data[13] = 4; // photon was detected
1163 Ckov_data[14] = mom[0];
1164 Ckov_data[15] = mom[1];
1165 Ckov_data[16] = mom[2];
1166
1167 destep = gMC->Edep();
1168 gMC->SetMaxStep(big);
1169 cherenkov_loss += destep;
1170 Ckov_data[7]=cherenkov_loss;
1171
6d31e556 1172 NPads = MakePadHits(Localpos[0],Localpos[2],cherenkov_loss,idvol,cerenkov);
6e36c0f2 1173 if (fNPadHits > (Int_t)Ckov_data[8]) {
1174 Ckov_data[8]= Ckov_data[8]+1;
1175 Ckov_data[9]= (Float_t) fNPadHits;
1176 }
1177 //if (sector != -1)
1178 //{
1179 AddHit(gAlice->CurrentTrack(),vol,Ckov_data);
1180 AddCerenkov(gAlice->CurrentTrack(),vol,Ckov_data);
1181 //}
1182 }
ddae0931 1183 }
6e36c0f2 1184 }
1185 }
1186
1187 /***********************************************End of photon hits*********************************************/
1188
1189
1190 /**********************************************Charged particles treatment*************************************/
1191
6d31e556 1192 else if (gMC->TrackCharge())
1193 //else if (1 == 1)
6e36c0f2 1194 {
ddae0931 1195//If MIP
6e36c0f2 1196 /*if (gMC->IsTrackEntering())
1197 {
1198 hits[13]=20;//is track entering?
1199 }*/
1200 if (gMC->VolId("FRE1")==gMC->CurrentVolID(copy) || gMC->VolId("FRE2")==gMC->CurrentVolID(copy))
1201 {
1202 fFreon_prod=1;
1203 }
1204
ddae0931 1205 if (gMC->VolId("GAP ")== gMC->CurrentVolID(copy)) {
6e36c0f2 1206// Get current particle id (ipart), track position (pos) and momentum (mom)
1207
1208 gMC->CurrentVolOffID(3,copy);
1209 vol[0]=copy;
1210 idvol=vol[0]-1;
ddae0931 1211
6e36c0f2 1212 //Int_t sector=((AliRICHChamber*) (*fChambers)[idvol])
1213 //->Sector(Localpos[0], Localpos[2]);
1214 //printf("Sector:%d\n",sector);
1215
ddae0931 1216 gMC->TrackPosition(Position);
1217 gMC->TrackMomentum(Momentum);
1218 pos[0]=Position(0);
1219 pos[1]=Position(1);
1220 pos[2]=Position(2);
1221 mom[0]=Momentum(0);
1222 mom[1]=Momentum(1);
1223 mom[2]=Momentum(2);
1224 mom[3]=Momentum(3);
1225 gMC->Gmtod(pos,Localpos,1);
1226 gMC->Gmtod(mom,Localmom,2);
1227
1228 ipart = gMC->TrackPid();
1229 //
1230 // momentum loss and steplength in last step
1231 destep = gMC->Edep();
1232 step = gMC->TrackStep();
1233
1234 //
1235 // record hits when track enters ...
1236 if( gMC->IsTrackEntering()) {
6e36c0f2 1237// gMC->SetMaxStep(fMaxStepGas);
ddae0931 1238 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
1239 Double_t rt = TMath::Sqrt(tc);
1240 theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
1241 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1242
6e36c0f2 1243
1244 Double_t Localtc = Localmom[0]*Localmom[0]+Localmom[2]*Localmom[2];
1245 Double_t Localrt = TMath::Sqrt(Localtc);
1246 Localtheta = Float_t(TMath::ATan2(Localrt,Double_t(Localmom[1])))*kRaddeg;
1247 Localphi = Float_t(TMath::ATan2(Double_t(Localmom[2]),Double_t(Localmom[0])))*kRaddeg;
ddae0931 1248
1249 hits[0] = Float_t(ipart); // particle type
6e36c0f2 1250 hits[1] = Localpos[0]; // X-position for hit
1251 hits[2] = Localpos[1]; // Y-position for hit
1252 hits[3] = Localpos[2]; // Z-position for hit
1253 hits[4] = Localtheta; // theta angle of incidence
1254 hits[5] = Localphi; // phi angle of incidence
1255 hits[8] = (Float_t) fNPadHits; // first padhit
ddae0931 1256 hits[9] = -1; // last pad hit
6e36c0f2 1257 hits[13] = fFreon_prod; // did id hit the freon?
1258 hits[14] = mom[0];
1259 hits[15] = mom[1];
1260 hits[16] = mom[2];
1261
ddae0931 1262 tlength = 0;
1263 eloss = 0;
6e36c0f2 1264 fFreon_prod = 0;
1265
ddae0931 1266 Chamber(idvol).LocaltoGlobal(Localpos,hits+1);
6e36c0f2 1267
ddae0931 1268
1269 //To make chamber coordinates x-y had to pass LocalPos[0], LocalPos[2]
1270 xhit = Localpos[0];
1271 yhit = Localpos[2];
1272 // Only if not trigger chamber
1273 if(idvol<7) {
1274 //
1275 // Initialize hit position (cursor) in the segmentation model
6e36c0f2 1276 ((AliRICHChamber*) (*fChambers)[idvol])
ddae0931 1277 ->SigGenInit(Localpos[0], Localpos[2], Localpos[1]);
1278 }
1279 }
1280
1281 //
1282 // Calculate the charge induced on a pad (disintegration) in case
1283 //
1284 // Mip left chamber ...
1285 if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
1286 gMC->SetMaxStep(big);
1287 eloss += destep;
1288 tlength += step;
1289
6e36c0f2 1290
ddae0931 1291 // Only if not trigger chamber
1292 if(idvol<7) {
6d31e556 1293 if (eloss > 0)
1294 {
1295 if(gMC->TrackPid() == kNeutron)
1296 printf("\n\n\n\n\n Neutron Making Pad Hit!!! \n\n\n\n");
1297 NPads = MakePadHits(xhit,yhit,eloss,idvol,mip);
1298 }
ddae0931 1299 }
1300
1301 hits[6]=tlength;
1302 hits[7]=eloss;
6e36c0f2 1303 if (fNPadHits > (Int_t)hits[8]) {
ddae0931 1304 hits[8]= hits[8]+1;
6e36c0f2 1305 hits[9]= (Float_t) fNPadHits;
ddae0931 1306 }
6e36c0f2 1307
1308 //if(sector !=-1)
1309 new(lhits[fNhits++]) AliRICHHit(fIshunt,gAlice->CurrentTrack(),vol,hits);
ddae0931 1310 eloss = 0;
1311 //
1312 // Check additional signal generation conditions
1313 // defined by the segmentation
1314 // model (boundary crossing conditions)
1315 } else if
6e36c0f2 1316 (((AliRICHChamber*) (*fChambers)[idvol])
ddae0931 1317 ->SigGenCond(Localpos[0], Localpos[2], Localpos[1]))
1318 {
6e36c0f2 1319 ((AliRICHChamber*) (*fChambers)[idvol])
ddae0931 1320 ->SigGenInit(Localpos[0], Localpos[2], Localpos[1]);
6d31e556 1321 if (eloss > 0)
1322 {
1323 if(gMC->TrackPid() == kNeutron)
1324 printf("\n\n\n\n\n Neutron Making Pad Hit!!! \n\n\n\n");
1325 NPads = MakePadHits(xhit,yhit,eloss,idvol,mip);
1326 }
ddae0931 1327 xhit = Localpos[0];
1328 yhit = Localpos[2];
1329 eloss = destep;
1330 tlength += step ;
1331 //
1332 // nothing special happened, add up energy loss
1333 } else {
1334 eloss += destep;
1335 tlength += step ;
1336 }
1337 }
6e36c0f2 1338 }
1339 /*************************************************End of MIP treatment**************************************/
1340 //}
ddae0931 1341}
1342
1343
1344//___________________________________________
6d31e556 1345Int_t AliRICH::MakePadHits(Float_t xhit,Float_t yhit,Float_t eloss, Int_t idvol, Response_t res)
ddae0931 1346{
1347//
1348// Calls the charge disintegration method of the current chamber and adds
1349// the simulated cluster to the root treee
1350//
1351 Int_t clhits[7];
1352 Float_t newclust[6][500];
1353 Int_t nnew;
1354
1355//
1356// Integrated pulse height on chamber
1357
1358 clhits[0]=fNhits+1;
1359
6e36c0f2 1360 ((AliRICHChamber*) (*fChambers)[idvol])->DisIntegration(eloss, xhit, yhit, nnew, newclust, res);
ddae0931 1361 Int_t ic=0;
1362
1363//
1364// Add new clusters
1365 for (Int_t i=0; i<nnew; i++) {
1366 if (Int_t(newclust[3][i]) > 0) {
1367 ic++;
1368// Cathode plane
1369 clhits[1] = Int_t(newclust[5][i]);
1370// Cluster Charge
1371 clhits[2] = Int_t(newclust[0][i]);
1372// Pad: ix
1373 clhits[3] = Int_t(newclust[1][i]);
1374// Pad: iy
1375 clhits[4] = Int_t(newclust[2][i]);
1376// Pad: charge
1377 clhits[5] = Int_t(newclust[3][i]);
1378// Pad: chamber sector
1379 clhits[6] = Int_t(newclust[4][i]);
1380
6e36c0f2 1381 AddPadHit(clhits);
ddae0931 1382 }
1383 }
6d31e556 1384return nnew;
ddae0931 1385}