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99336540 | 1 | |
46d29e70 | 2 | /************************************************************************** |
3 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * * | |
5 | * Author: The ALICE Off-line Project. * | |
6 | * Contributors are mentioned in the code where appropriate. * | |
7 | * * | |
8 | * Permission to use, copy, modify and distribute this software and its * | |
9 | * documentation strictly for non-commercial purposes is hereby granted * | |
10 | * without fee, provided that the above copyright notice appears in all * | |
11 | * copies and that both the copyright notice and this permission notice * | |
12 | * appear in the supporting documentation. The authors make no claims * | |
13 | * about the suitability of this software for any purpose. It is * | |
14 | * provided "as is" without express or implied warranty. * | |
15 | **************************************************************************/ | |
16 | ||
88cb7938 | 17 | /* $Id$ */ |
46d29e70 | 18 | |
c8ab4518 | 19 | //////////////////////////////////////////////////////////////////////////// |
20 | // // | |
21 | // TRD simulation - multimodule (regular rad.) // | |
22 | // after: M. CASTELLANO et al., COMP. PHYS. COMM. 51 (1988) 431 // | |
23 | // + COMP. PHYS. COMM. 61 (1990) 395 // | |
24 | // // | |
25 | // 17.07.1998 - A.Andronic // | |
26 | // 08.12.1998 - simplified version // | |
27 | // 11.07.2000 - Adapted code to aliroot environment (C.Blume) // | |
28 | // 04.06.2004 - Momentum dependent parameters implemented (CBL) // | |
29 | // // | |
30 | //////////////////////////////////////////////////////////////////////////// | |
46d29e70 | 31 | |
0e9c2ad5 | 32 | #include <TH1.h> |
33 | #include <TRandom.h> | |
34 | #include <TMath.h> | |
a16be6c3 | 35 | #include <TVirtualMC.h> |
36 | #include <TVirtualMCStack.h> | |
46d29e70 | 37 | |
46d29e70 | 38 | #include "AliModule.h" |
39 | ||
cb2f9e9b | 40 | #include "AliTRDsimTR.h" |
0e9c2ad5 | 41 | |
cb2f9e9b | 42 | ClassImp(AliTRDsimTR) |
46d29e70 | 43 | |
44 | //_____________________________________________________________________________ | |
cb2f9e9b | 45 | AliTRDsimTR::AliTRDsimTR() |
3bc9d03e | 46 | :TObject() |
47 | ,fNFoilsDim(0) | |
48 | ,fNFoils(0) | |
49 | ,fNFoilsUp(0) | |
50 | ,fFoilThick(0) | |
51 | ,fGapThick(0) | |
52 | ,fFoilDens(0) | |
53 | ,fGapDens(0) | |
54 | ,fFoilOmega(0) | |
55 | ,fGapOmega() | |
56 | ,fFoilZ(0) | |
57 | ,fGapZ(0) | |
58 | ,fFoilA(0) | |
59 | ,fGapA(0) | |
60 | ,fTemp(0) | |
61 | ,fSpNBins(0) | |
62 | ,fSpRange(0) | |
63 | ,fSpBinWidth(0) | |
64 | ,fSpLower(0) | |
65 | ,fSpUpper(0) | |
66 | ,fSigma(0) | |
67 | ,fSpectrum(0) | |
46d29e70 | 68 | { |
69 | // | |
cb2f9e9b | 70 | // AliTRDsimTR default constructor |
46d29e70 | 71 | // |
72 | ||
73 | Init(); | |
74 | ||
75 | } | |
76 | ||
77 | //_____________________________________________________________________________ | |
cb2f9e9b | 78 | AliTRDsimTR::AliTRDsimTR(AliModule *mod, Int_t foil, Int_t gap) |
3bc9d03e | 79 | :TObject() |
80 | ,fNFoilsDim(0) | |
81 | ,fNFoils(0) | |
82 | ,fNFoilsUp(0) | |
83 | ,fFoilThick(0) | |
84 | ,fGapThick(0) | |
85 | ,fFoilDens(0) | |
86 | ,fGapDens(0) | |
87 | ,fFoilOmega(0) | |
88 | ,fGapOmega() | |
89 | ,fFoilZ(0) | |
90 | ,fGapZ(0) | |
91 | ,fFoilA(0) | |
92 | ,fGapA(0) | |
93 | ,fTemp(0) | |
94 | ,fSpNBins(0) | |
95 | ,fSpRange(0) | |
96 | ,fSpBinWidth(0) | |
97 | ,fSpLower(0) | |
98 | ,fSpUpper(0) | |
99 | ,fSigma(0) | |
100 | ,fSpectrum(0) | |
46d29e70 | 101 | { |
102 | // | |
cb2f9e9b | 103 | // AliTRDsimTR constructor. Takes the material properties of the radiator |
46d29e70 | 104 | // foils and the gas in the gaps from AliModule <mod>. |
105 | // The default number of foils is 100 with a thickness of 20 mu. The | |
106 | // thickness of the gaps is 500 mu. | |
107 | // | |
108 | ||
3bc9d03e | 109 | Float_t aFoil; |
110 | Float_t zFoil; | |
111 | Float_t rhoFoil; | |
112 | ||
113 | Float_t aGap; | |
114 | Float_t zGap; | |
115 | Float_t rhoGap; | |
46d29e70 | 116 | |
3bc9d03e | 117 | Float_t rad; |
118 | Float_t abs; | |
119 | ||
120 | Char_t name[21]; | |
fa5e892a | 121 | |
46d29e70 | 122 | Init(); |
123 | ||
124 | mod->AliGetMaterial(foil,name,aFoil,zFoil,rhoFoil,rad,abs); | |
125 | mod->AliGetMaterial(gap ,name,aGap ,zGap ,rhoGap ,rad,abs); | |
126 | ||
127 | fFoilDens = rhoFoil; | |
128 | fFoilA = aFoil; | |
129 | fFoilZ = zFoil; | |
130 | fFoilOmega = Omega(fFoilDens,fFoilZ,fFoilA); | |
131 | ||
132 | fGapDens = rhoGap; | |
133 | fGapA = aGap; | |
134 | fGapZ = zGap; | |
135 | fGapOmega = Omega(fGapDens ,fGapZ ,fGapA ); | |
136 | ||
137 | } | |
138 | ||
139 | //_____________________________________________________________________________ | |
cb2f9e9b | 140 | AliTRDsimTR::AliTRDsimTR(const AliTRDsimTR &s) |
3bc9d03e | 141 | :TObject(s) |
142 | ,fNFoilsDim(s.fNFoilsDim) | |
143 | ,fNFoils(0) | |
144 | ,fNFoilsUp(0) | |
145 | ,fFoilThick(s.fFoilThick) | |
146 | ,fGapThick(s.fGapThick) | |
147 | ,fFoilDens(s.fFoilDens) | |
148 | ,fGapDens(s.fGapDens) | |
149 | ,fFoilOmega(s.fFoilOmega) | |
150 | ,fGapOmega(s.fGapOmega) | |
151 | ,fFoilZ(s.fFoilZ) | |
152 | ,fGapZ(s.fGapZ) | |
153 | ,fFoilA(s.fFoilA) | |
154 | ,fGapA(s.fGapA) | |
155 | ,fTemp(s.fTemp) | |
156 | ,fSpNBins(s.fSpNBins) | |
157 | ,fSpRange(s.fSpRange) | |
158 | ,fSpBinWidth(s.fSpBinWidth) | |
159 | ,fSpLower(s.fSpLower) | |
160 | ,fSpUpper(s.fSpUpper) | |
161 | ,fSigma(0) | |
162 | ,fSpectrum(0) | |
46d29e70 | 163 | { |
164 | // | |
cb2f9e9b | 165 | // AliTRDsimTR copy constructor |
46d29e70 | 166 | // |
167 | ||
024c0422 | 168 | fNFoils = new Int_t[fNFoilsDim]; |
3bc9d03e | 169 | for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) { |
024c0422 | 170 | fNFoils[iFoil] = ((AliTRDsimTR &) s).fNFoils[iFoil]; |
3bc9d03e | 171 | } |
172 | ||
024c0422 | 173 | fNFoilsUp = new Double_t[fNFoilsDim]; |
3bc9d03e | 174 | for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) { |
024c0422 | 175 | fNFoilsUp[iFoil] = ((AliTRDsimTR &) s).fNFoilsUp[iFoil]; |
3bc9d03e | 176 | } |
177 | ||
024c0422 | 178 | fSigma = new Double_t[fSpNBins]; |
3bc9d03e | 179 | for (Int_t iBin = 0; iBin < fSpNBins; iBin++) { |
024c0422 | 180 | fSigma[iBin] = ((AliTRDsimTR &) s).fSigma[iBin]; |
3bc9d03e | 181 | } |
182 | ||
46d29e70 | 183 | } |
184 | ||
185 | //_____________________________________________________________________________ | |
cb2f9e9b | 186 | AliTRDsimTR::~AliTRDsimTR() |
46d29e70 | 187 | { |
188 | // | |
cb2f9e9b | 189 | // AliTRDsimTR destructor |
46d29e70 | 190 | // |
191 | ||
3bc9d03e | 192 | if (fSigma) { |
193 | delete [] fSigma; | |
194 | fSigma = 0; | |
195 | } | |
196 | ||
197 | if (fNFoils) { | |
198 | delete [] fNFoils; | |
199 | fNFoils = 0; | |
200 | } | |
201 | ||
202 | if (fNFoilsUp) { | |
203 | delete [] fNFoilsUp; | |
204 | fNFoilsUp = 0; | |
205 | } | |
46d29e70 | 206 | |
120272f4 | 207 | if (fSpectrum) { |
208 | delete fSpectrum; | |
209 | fSpectrum = 0; | |
210 | } | |
211 | ||
46d29e70 | 212 | } |
213 | ||
214 | //_____________________________________________________________________________ | |
cb2f9e9b | 215 | AliTRDsimTR &AliTRDsimTR::operator=(const AliTRDsimTR &s) |
46d29e70 | 216 | { |
217 | // | |
218 | // Assignment operator | |
219 | // | |
220 | ||
cb2f9e9b | 221 | if (this != &s) ((AliTRDsimTR &) s).Copy(*this); |
12c9b1c3 | 222 | this->Init(); |
3bc9d03e | 223 | |
46d29e70 | 224 | return *this; |
225 | ||
226 | } | |
227 | ||
228 | //_____________________________________________________________________________ | |
cb2f9e9b | 229 | void AliTRDsimTR::Copy(TObject &s) const |
46d29e70 | 230 | { |
231 | // | |
232 | // Copy function | |
233 | // | |
234 | ||
cb2f9e9b | 235 | ((AliTRDsimTR &) s).fFoilThick = fFoilThick; |
236 | ((AliTRDsimTR &) s).fFoilDens = fFoilDens; | |
237 | ((AliTRDsimTR &) s).fFoilOmega = fFoilOmega; | |
238 | ((AliTRDsimTR &) s).fFoilZ = fFoilZ; | |
239 | ((AliTRDsimTR &) s).fFoilA = fFoilA; | |
240 | ((AliTRDsimTR &) s).fGapThick = fGapThick; | |
241 | ((AliTRDsimTR &) s).fGapDens = fGapDens; | |
242 | ((AliTRDsimTR &) s).fGapOmega = fGapOmega; | |
243 | ((AliTRDsimTR &) s).fGapZ = fGapZ; | |
244 | ((AliTRDsimTR &) s).fGapA = fGapA; | |
245 | ((AliTRDsimTR &) s).fTemp = fTemp; | |
246 | ((AliTRDsimTR &) s).fSpNBins = fSpNBins; | |
247 | ((AliTRDsimTR &) s).fSpRange = fSpRange; | |
248 | ((AliTRDsimTR &) s).fSpBinWidth = fSpBinWidth; | |
249 | ((AliTRDsimTR &) s).fSpLower = fSpLower; | |
250 | ((AliTRDsimTR &) s).fSpUpper = fSpUpper; | |
251 | ||
252 | if (((AliTRDsimTR &) s).fNFoils) { | |
253 | delete [] ((AliTRDsimTR &) s).fNFoils; | |
3bc9d03e | 254 | } |
cb2f9e9b | 255 | ((AliTRDsimTR &) s).fNFoils = new Int_t[fNFoilsDim]; |
0142cb22 | 256 | for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) { |
cb2f9e9b | 257 | ((AliTRDsimTR &) s).fNFoils[iFoil] = fNFoils[iFoil]; |
0142cb22 | 258 | } |
259 | ||
cb2f9e9b | 260 | if (((AliTRDsimTR &) s).fNFoilsUp) { |
261 | delete [] ((AliTRDsimTR &) s).fNFoilsUp; | |
3bc9d03e | 262 | } |
cb2f9e9b | 263 | ((AliTRDsimTR &) s).fNFoilsUp = new Double_t[fNFoilsDim]; |
0142cb22 | 264 | for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) { |
cb2f9e9b | 265 | ((AliTRDsimTR &) s).fNFoilsUp[iFoil] = fNFoilsUp[iFoil]; |
0142cb22 | 266 | } |
267 | ||
cb2f9e9b | 268 | if (((AliTRDsimTR &) s).fSigma) { |
269 | delete [] ((AliTRDsimTR &) s).fSigma; | |
3bc9d03e | 270 | } |
cb2f9e9b | 271 | ((AliTRDsimTR &) s).fSigma = new Double_t[fSpNBins]; |
46d29e70 | 272 | for (Int_t iBin = 0; iBin < fSpNBins; iBin++) { |
cb2f9e9b | 273 | ((AliTRDsimTR &) s).fSigma[iBin] = fSigma[iBin]; |
46d29e70 | 274 | } |
275 | ||
46d29e70 | 276 | } |
277 | ||
278 | //_____________________________________________________________________________ | |
cb2f9e9b | 279 | void AliTRDsimTR::Init() |
46d29e70 | 280 | { |
281 | // | |
282 | // Initialization | |
0142cb22 | 283 | // The default radiator are prolypropilene foils of 10 mu thickness |
284 | // with gaps of 80 mu filled with N2. | |
46d29e70 | 285 | // |
286 | ||
0142cb22 | 287 | fNFoilsDim = 7; |
288 | ||
3bc9d03e | 289 | if (fNFoils) { |
290 | delete [] fNFoils; | |
291 | } | |
0142cb22 | 292 | fNFoils = new Int_t[fNFoilsDim]; |
293 | fNFoils[0] = 170; | |
3bc9d03e | 294 | fNFoils[1] = 225; |
295 | fNFoils[2] = 275; | |
296 | fNFoils[3] = 305; | |
297 | fNFoils[4] = 325; | |
298 | fNFoils[5] = 340; | |
299 | fNFoils[6] = 350; | |
300 | ||
301 | if (fNFoilsUp) { | |
302 | delete [] fNFoilsUp; | |
303 | } | |
0142cb22 | 304 | fNFoilsUp = new Double_t[fNFoilsDim]; |
305 | fNFoilsUp[0] = 1.25; | |
306 | fNFoilsUp[1] = 1.75; | |
307 | fNFoilsUp[2] = 2.50; | |
308 | fNFoilsUp[3] = 3.50; | |
309 | fNFoilsUp[4] = 4.50; | |
310 | fNFoilsUp[5] = 5.50; | |
311 | fNFoilsUp[6] = 10000.0; | |
46d29e70 | 312 | |
db30bf0f | 313 | fFoilThick = 0.0013; |
46d29e70 | 314 | fFoilDens = 0.92; |
315 | fFoilZ = 5.28571; | |
316 | fFoilA = 10.4286; | |
317 | fFoilOmega = Omega(fFoilDens,fFoilZ,fFoilA); | |
318 | ||
db30bf0f | 319 | fGapThick = 0.0060; |
0142cb22 | 320 | fGapDens = 0.00125; |
321 | fGapZ = 7.0; | |
322 | fGapA = 14.00674; | |
46d29e70 | 323 | fGapOmega = Omega(fGapDens ,fGapZ ,fGapA ); |
324 | ||
325 | fTemp = 293.16; | |
326 | ||
327 | fSpNBins = 200; | |
328 | fSpRange = 100; | |
329 | fSpBinWidth = fSpRange / fSpNBins; | |
330 | fSpLower = 1.0 - 0.5 * fSpBinWidth; | |
331 | fSpUpper = fSpLower + fSpRange; | |
332 | ||
333 | if (fSpectrum) delete fSpectrum; | |
334 | fSpectrum = new TH1D("TRspectrum","TR spectrum",fSpNBins,fSpLower,fSpUpper); | |
abaf1f1d | 335 | fSpectrum->SetDirectory(0); |
46d29e70 | 336 | |
337 | // Set the sigma values | |
338 | SetSigma(); | |
339 | ||
340 | } | |
341 | ||
342 | //_____________________________________________________________________________ | |
cb2f9e9b | 343 | Int_t AliTRDsimTR::CreatePhotons(Int_t pdg, Float_t p |
46d29e70 | 344 | , Int_t &nPhoton, Float_t *ePhoton) |
345 | { | |
346 | // | |
347 | // Create TRD photons for a charged particle of type <pdg> with the total | |
348 | // momentum <p>. | |
349 | // Number of produced TR photons: <nPhoton> | |
350 | // Energies of the produced TR photons: <ePhoton> | |
351 | // | |
352 | ||
353 | // PDG codes | |
354 | const Int_t kPdgEle = 11; | |
355 | const Int_t kPdgMuon = 13; | |
356 | const Int_t kPdgPion = 211; | |
357 | const Int_t kPdgKaon = 321; | |
358 | ||
359 | Float_t mass = 0; | |
360 | switch (TMath::Abs(pdg)) { | |
361 | case kPdgEle: | |
362 | mass = 5.11e-4; | |
363 | break; | |
364 | case kPdgMuon: | |
365 | mass = 0.10566; | |
366 | break; | |
367 | case kPdgPion: | |
368 | mass = 0.13957; | |
369 | break; | |
370 | case kPdgKaon: | |
371 | mass = 0.4937; | |
372 | break; | |
373 | default: | |
374 | return 0; | |
375 | break; | |
376 | }; | |
377 | ||
46d29e70 | 378 | // Calculate the TR photons |
0142cb22 | 379 | return TrPhotons(p, mass, nPhoton, ePhoton); |
46d29e70 | 380 | |
381 | } | |
382 | ||
383 | //_____________________________________________________________________________ | |
cb2f9e9b | 384 | Int_t AliTRDsimTR::TrPhotons(Float_t p, Float_t mass |
0142cb22 | 385 | , Int_t &nPhoton, Float_t *ePhoton) |
46d29e70 | 386 | { |
387 | // | |
a16be6c3 | 388 | // Produces TR photons using a parametric model for regular radiator. Photons |
389 | // with energy larger than 15 keV are included in the MC stack and tracked by VMC | |
390 | // machinary. | |
46d29e70 | 391 | // |
a16be6c3 | 392 | // Input parameters: |
393 | // p - parent momentum [GeV/c] | |
394 | // mass - parent mass | |
395 | // | |
396 | // Output : | |
397 | // nPhoton - number of photons which have to be processed by custom code | |
398 | // ePhoton - energy of this photons in keV. | |
399 | // | |
46d29e70 | 400 | |
401 | const Double_t kAlpha = 0.0072973; | |
99336540 | 402 | const Int_t kSumMax = 30; |
403 | ||
3bc9d03e | 404 | Double_t tau = fGapThick / fFoilThick; |
46d29e70 | 405 | |
0142cb22 | 406 | // Calculate gamma |
407 | Double_t gamma = TMath::Sqrt(p*p + mass*mass) / mass; | |
408 | ||
409 | // Select the number of foils corresponding to momentum | |
410 | Int_t foils = SelectNFoils(p); | |
411 | ||
46d29e70 | 412 | fSpectrum->Reset(); |
413 | ||
414 | // The TR spectrum | |
3bc9d03e | 415 | Double_t csi1; |
416 | Double_t csi2; | |
417 | Double_t rho1; | |
418 | Double_t rho2; | |
ad4aeaf4 | 419 | Double_t sigma; |
3bc9d03e | 420 | Double_t sum; |
421 | Double_t nEqu; | |
422 | Double_t thetaN; | |
423 | Double_t aux; | |
424 | Double_t energyeV; | |
425 | Double_t energykeV; | |
3bc9d03e | 426 | for (Int_t iBin = 1; iBin <= fSpNBins; iBin++) { |
46d29e70 | 427 | |
3bc9d03e | 428 | energykeV = fSpectrum->GetBinCenter(iBin); |
a16be6c3 | 429 | energyeV = energykeV * 1.0e3; |
430 | ||
f2979d08 | 431 | sigma = Sigma(energykeV); |
3bc9d03e | 432 | |
433 | csi1 = fFoilOmega / energyeV; | |
434 | csi2 = fGapOmega / energyeV; | |
435 | ||
436 | rho1 = 2.5 * energyeV * fFoilThick * 1.0e4 | |
a16be6c3 | 437 | * (1.0 / (gamma*gamma) + csi1*csi1); |
3bc9d03e | 438 | rho2 = 2.5 * energyeV * fFoilThick * 1.0e4 |
a16be6c3 | 439 | * (1.0 / (gamma*gamma) + csi2 *csi2); |
46d29e70 | 440 | |
441 | // Calculate the sum | |
a16be6c3 | 442 | sum = 0.0; |
99336540 | 443 | for (Int_t n = 1; n <= kSumMax; n++) { |
3bc9d03e | 444 | thetaN = (TMath::Pi() * 2.0 * n - (rho1 + tau * rho2)) / (1.0 + tau); |
445 | if (thetaN < 0.0) { | |
446 | thetaN = 0.0; | |
447 | } | |
a16be6c3 | 448 | aux = 1.0 / (rho1 + thetaN) - 1.0 / (rho2 + thetaN); |
3bc9d03e | 449 | sum += thetaN * (aux*aux) * (1.0 - TMath::Cos(rho1 + thetaN)); |
46d29e70 | 450 | } |
451 | ||
99336540 | 452 | // Equivalent number of foils |
ad4aeaf4 | 453 | nEqu = (1.0 - TMath::Exp(-foils * sigma)) / (1.0 - TMath::Exp(-sigma)); |
46d29e70 | 454 | |
455 | // dN / domega | |
a16be6c3 | 456 | fSpectrum->SetBinContent(iBin,4.0 * kAlpha * nEqu * sum / (energykeV * (1.0 + tau))); |
3bc9d03e | 457 | |
46d29e70 | 458 | } |
459 | ||
460 | // <nTR> (binsize corr.) | |
a16be6c3 | 461 | Float_t nTr = fSpBinWidth * fSpectrum->Integral(); |
462 | // Number of TR photons from Poisson distribution with mean <nTr> | |
463 | Int_t nPhCand = gRandom->Poisson(nTr); | |
464 | ||
465 | // Link the MC stack and get info about parent electron | |
2a2bc2e4 | 466 | TVirtualMCStack *stack = gMC->GetStack(); |
a16be6c3 | 467 | Int_t track = stack->GetCurrentTrackNumber(); |
2a2bc2e4 | 468 | Double_t px, py, pz, ptot; |
3bf98338 | 469 | gMC->TrackMomentum(px,py,pz,ptot); |
470 | ptot = TMath::Sqrt(px*px+py*py+pz*pz); | |
471 | px /= ptot; | |
472 | py /= ptot; | |
473 | pz /= ptot; | |
a16be6c3 | 474 | |
475 | // Current position of electron | |
476 | Double_t x; | |
477 | Double_t y; | |
478 | Double_t z; | |
479 | gMC->TrackPosition(x,y,z); | |
2a2bc2e4 | 480 | Double_t t = gMC->TrackTime(); |
481 | ||
a16be6c3 | 482 | // Counter for TR analysed in custom code (e < 15keV) |
483 | nPhoton = 0; | |
484 | ||
485 | for (Int_t iPhoton = 0; iPhoton < nPhCand; iPhoton++) { | |
486 | ||
487 | // Energy of the TR photon | |
488 | Double_t e = fSpectrum->GetRandom(); | |
489 | ||
490 | // Put TR photon on particle stack | |
2a2bc2e4 | 491 | if (e > 15.0) { |
a16be6c3 | 492 | |
493 | e *= 1.0e-6; // Convert it to GeV | |
494 | ||
495 | Int_t phtrack; | |
2a2bc2e4 | 496 | stack->PushTrack(1 // Must be 1 |
497 | ,track // Identifier of the parent track, -1 for a primary | |
498 | ,22 // Particle code. | |
499 | ,px*e // 4 momentum (The photon is generated on the same | |
500 | ,py*e // direction as the parent. For irregular radiator one | |
501 | ,pz*e // can calculate also the angle but this is a secondary | |
502 | ,e // order effect) | |
503 | ,x,y,z,t // 4 vertex | |
504 | ,0.0,0.0,0.0 // Polarisation | |
505 | ,kPFeedBackPhoton // Production mechanism (there is no TR in G3 so one | |
506 | // has to make some convention) | |
507 | ,phtrack // On output the number of the track stored | |
508 | ,1.0 | |
509 | ,1); | |
a16be6c3 | 510 | |
511 | } | |
512 | // Custom treatment of TR photons | |
513 | else { | |
514 | ||
515 | ePhoton[nPhoton++] = e; | |
516 | ||
517 | } | |
518 | ||
46d29e70 | 519 | } |
520 | ||
521 | return 1; | |
522 | ||
523 | } | |
524 | ||
525 | //_____________________________________________________________________________ | |
cb2f9e9b | 526 | void AliTRDsimTR::SetSigma() |
46d29e70 | 527 | { |
528 | // | |
529 | // Sets the absorbtion crosssection for the energies of the TR spectrum | |
530 | // | |
531 | ||
3bc9d03e | 532 | if (fSigma) { |
533 | delete [] fSigma; | |
534 | } | |
46d29e70 | 535 | fSigma = new Double_t[fSpNBins]; |
3bc9d03e | 536 | |
46d29e70 | 537 | for (Int_t iBin = 0; iBin < fSpNBins; iBin++) { |
538 | Double_t energykeV = iBin * fSpBinWidth + 1.0; | |
539 | fSigma[iBin] = Sigma(energykeV); | |
46d29e70 | 540 | } |
541 | ||
542 | } | |
543 | ||
544 | //_____________________________________________________________________________ | |
cb2f9e9b | 545 | Double_t AliTRDsimTR::Sigma(Double_t energykeV) |
46d29e70 | 546 | { |
547 | // | |
548 | // Calculates the absorbtion crosssection for a one-foil-one-gap-radiator | |
549 | // | |
550 | ||
46d29e70 | 551 | // keV -> MeV |
552 | Double_t energyMeV = energykeV * 0.001; | |
553 | if (energyMeV >= 0.001) { | |
842287f2 | 554 | return(GetMuPo(energyMeV) * fFoilDens * fFoilThick + |
555 | GetMuAi(energyMeV) * fGapDens * fGapThick * GetTemp()); | |
46d29e70 | 556 | } |
557 | else { | |
3bc9d03e | 558 | return 1.0e6; |
46d29e70 | 559 | } |
560 | ||
561 | } | |
562 | ||
563 | //_____________________________________________________________________________ | |
cb2f9e9b | 564 | Double_t AliTRDsimTR::GetMuPo(Double_t energyMeV) |
46d29e70 | 565 | { |
566 | // | |
567 | // Returns the photon absorbtion cross section for polypropylene | |
568 | // | |
569 | ||
570 | const Int_t kN = 36; | |
571 | ||
572 | Double_t mu[kN] = { 1.894E+03, 5.999E+02, 2.593E+02 | |
573 | , 7.743E+01, 3.242E+01, 1.643E+01 | |
574 | , 9.432E+00, 3.975E+00, 2.088E+00 | |
575 | , 7.452E-01, 4.315E-01, 2.706E-01 | |
576 | , 2.275E-01, 2.084E-01, 1.970E-01 | |
577 | , 1.823E-01, 1.719E-01, 1.534E-01 | |
578 | , 1.402E-01, 1.217E-01, 1.089E-01 | |
579 | , 9.947E-02, 9.198E-02, 8.078E-02 | |
580 | , 7.262E-02, 6.495E-02, 5.910E-02 | |
581 | , 5.064E-02, 4.045E-02, 3.444E-02 | |
582 | , 3.045E-02, 2.760E-02, 2.383E-02 | |
583 | , 2.145E-02, 1.819E-02, 1.658E-02 }; | |
584 | ||
585 | Double_t en[kN] = { 1.000E-03, 1.500E-03, 2.000E-03 | |
586 | , 3.000E-03, 4.000E-03, 5.000E-03 | |
587 | , 6.000E-03, 8.000E-03, 1.000E-02 | |
588 | , 1.500E-02, 2.000E-02, 3.000E-02 | |
589 | , 4.000E-02, 5.000E-02, 6.000E-02 | |
590 | , 8.000E-02, 1.000E-01, 1.500E-01 | |
591 | , 2.000E-01, 3.000E-01, 4.000E-01 | |
592 | , 5.000E-01, 6.000E-01, 8.000E-01 | |
593 | , 1.000E+00, 1.250E+00, 1.500E+00 | |
594 | , 2.000E+00, 3.000E+00, 4.000E+00 | |
595 | , 5.000E+00, 6.000E+00, 8.000E+00 | |
596 | , 1.000E+01, 1.500E+01, 2.000E+01 }; | |
597 | ||
598 | return Interpolate(energyMeV,en,mu,kN); | |
599 | ||
600 | } | |
601 | ||
602 | //_____________________________________________________________________________ | |
cb2f9e9b | 603 | Double_t AliTRDsimTR::GetMuCO(Double_t energyMeV) |
46d29e70 | 604 | { |
605 | // | |
606 | // Returns the photon absorbtion cross section for CO2 | |
607 | // | |
608 | ||
609 | const Int_t kN = 36; | |
610 | ||
611 | Double_t mu[kN] = { 0.39383E+04, 0.13166E+04, 0.58750E+03 | |
612 | , 0.18240E+03, 0.77996E+02, 0.40024E+02 | |
613 | , 0.23116E+02, 0.96997E+01, 0.49726E+01 | |
614 | , 0.15543E+01, 0.74915E+00, 0.34442E+00 | |
615 | , 0.24440E+00, 0.20589E+00, 0.18632E+00 | |
616 | , 0.16578E+00, 0.15394E+00, 0.13558E+00 | |
617 | , 0.12336E+00, 0.10678E+00, 0.95510E-01 | |
618 | , 0.87165E-01, 0.80587E-01, 0.70769E-01 | |
619 | , 0.63626E-01, 0.56894E-01, 0.51782E-01 | |
620 | , 0.44499E-01, 0.35839E-01, 0.30825E-01 | |
621 | , 0.27555E-01, 0.25269E-01, 0.22311E-01 | |
622 | , 0.20516E-01, 0.18184E-01, 0.17152E-01 }; | |
623 | ||
624 | Double_t en[kN] = { 0.10000E-02, 0.15000E-02, 0.20000E-02 | |
625 | , 0.30000E-02, 0.40000E-02, 0.50000E-02 | |
626 | , 0.60000E-02, 0.80000E-02, 0.10000E-01 | |
627 | , 0.15000E-01, 0.20000E-01, 0.30000E-01 | |
628 | , 0.40000E-01, 0.50000E-01, 0.60000E-01 | |
629 | , 0.80000E-01, 0.10000E+00, 0.15000E+00 | |
630 | , 0.20000E+00, 0.30000E+00, 0.40000E+00 | |
631 | , 0.50000E+00, 0.60000E+00, 0.80000E+00 | |
632 | , 0.10000E+01, 0.12500E+01, 0.15000E+01 | |
633 | , 0.20000E+01, 0.30000E+01, 0.40000E+01 | |
634 | , 0.50000E+01, 0.60000E+01, 0.80000E+01 | |
635 | , 0.10000E+02, 0.15000E+02, 0.20000E+02 }; | |
636 | ||
637 | return Interpolate(energyMeV,en,mu,kN); | |
638 | ||
639 | } | |
640 | ||
641 | //_____________________________________________________________________________ | |
cb2f9e9b | 642 | Double_t AliTRDsimTR::GetMuXe(Double_t energyMeV) |
46d29e70 | 643 | { |
644 | // | |
645 | // Returns the photon absorbtion cross section for xenon | |
646 | // | |
647 | ||
648 | const Int_t kN = 48; | |
649 | ||
650 | Double_t mu[kN] = { 9.413E+03, 8.151E+03, 7.035E+03 | |
651 | , 7.338E+03, 4.085E+03, 2.088E+03 | |
652 | , 7.780E+02, 3.787E+02, 2.408E+02 | |
653 | , 6.941E+02, 6.392E+02, 6.044E+02 | |
654 | , 8.181E+02, 7.579E+02, 6.991E+02 | |
655 | , 8.064E+02, 6.376E+02, 3.032E+02 | |
656 | , 1.690E+02, 5.743E+01, 2.652E+01 | |
657 | , 8.930E+00, 6.129E+00, 3.316E+01 | |
658 | , 2.270E+01, 1.272E+01, 7.825E+00 | |
659 | , 3.633E+00, 2.011E+00, 7.202E-01 | |
660 | , 3.760E-01, 1.797E-01, 1.223E-01 | |
661 | , 9.699E-02, 8.281E-02, 6.696E-02 | |
662 | , 5.785E-02, 5.054E-02, 4.594E-02 | |
663 | , 4.078E-02, 3.681E-02, 3.577E-02 | |
664 | , 3.583E-02, 3.634E-02, 3.797E-02 | |
665 | , 3.987E-02, 4.445E-02, 4.815E-02 }; | |
666 | ||
667 | Double_t en[kN] = { 1.00000E-03, 1.07191E-03, 1.14900E-03 | |
668 | , 1.14900E-03, 1.50000E-03, 2.00000E-03 | |
669 | , 3.00000E-03, 4.00000E-03, 4.78220E-03 | |
670 | , 4.78220E-03, 5.00000E-03, 5.10370E-03 | |
671 | , 5.10370E-03, 5.27536E-03, 5.45280E-03 | |
672 | , 5.45280E-03, 6.00000E-03, 8.00000E-03 | |
673 | , 1.00000E-02, 1.50000E-02, 2.00000E-02 | |
674 | , 3.00000E-02, 3.45614E-02, 3.45614E-02 | |
675 | , 4.00000E-02, 5.00000E-02, 6.00000E-02 | |
676 | , 8.00000E-02, 1.00000E-01, 1.50000E-01 | |
677 | , 2.00000E-01, 3.00000E-01, 4.00000E-01 | |
678 | , 5.00000E-01, 6.00000E-01, 8.00000E-01 | |
679 | , 1.00000E+00, 1.25000E+00, 1.50000E+00 | |
680 | , 2.00000E+00, 3.00000E+00, 4.00000E+00 | |
681 | , 5.00000E+00, 6.00000E+00, 8.00000E+00 | |
682 | , 1.00000E+01, 1.50000E+01, 2.00000E+01 }; | |
683 | ||
f2979d08 | 684 | return Interpolate(energyMeV,en,mu,kN); |
46d29e70 | 685 | |
686 | } | |
687 | ||
688 | //_____________________________________________________________________________ | |
f2979d08 | 689 | Double_t AliTRDsimTR::GetMuAr(Double_t energyMeV) |
46d29e70 | 690 | { |
691 | // | |
f2979d08 | 692 | // Returns the photon absorbtion cross section for argon |
46d29e70 | 693 | // |
694 | ||
f2979d08 | 695 | const Int_t kN = 38; |
696 | ||
697 | Double_t mu[kN] = { 3.184E+03, 1.105E+03, 5.120E+02 | |
698 | , 1.703E+02, 1.424E+02, 1.275E+03 | |
699 | , 7.572E+02, 4.225E+02, 2.593E+02 | |
700 | , 1.180E+02, 6.316E+01, 1.983E+01 | |
701 | , 8.629E+00, 2.697E+00, 1.228E+00 | |
702 | , 7.012E-01, 4.664E-01, 2.760E-01 | |
703 | , 2.043E-01, 1.427E-01, 1.205E-01 | |
704 | , 9.953E-02, 8.776E-02, 7.958E-02 | |
705 | , 7.335E-02, 6.419E-02, 5.762E-02 | |
706 | , 5.150E-02, 4.695E-02, 4.074E-02 | |
707 | , 3.384E-02, 3.019E-02, 2.802E-02 | |
708 | , 2.667E-02, 2.517E-02, 2.451E-02 | |
709 | , 2.418E-02, 2.453E-02 }; | |
710 | ||
711 | Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03 | |
712 | , 3.00000E-03, 3.20290E-03, 3.20290E-03 | |
713 | , 4.00000E-03, 5.00000E-03, 6.00000E-03 | |
714 | , 8.00000E-03, 1.00000E-02, 1.50000E-02 | |
715 | , 2.00000E-02, 3.00000E-02, 4.00000E-02 | |
716 | , 5.00000E-02, 6.00000E-02, 8.00000E-02 | |
717 | , 1.00000E-01, 1.50000E-01, 2.00000E-01 | |
718 | , 3.00000E-01, 4.00000E-01, 5.00000E-01 | |
719 | , 6.00000E-01, 8.00000E-01, 1.00000E+00 | |
720 | , 1.25000E+00, 1.50000E+00, 2.00000E+00 | |
721 | , 3.00000E+00, 4.00000E+00, 5.00000E+00 | |
722 | , 6.00000E+00, 8.00000E+00, 1.00000E+01 | |
723 | , 1.50000E+01, 2.00000E+01 }; | |
46d29e70 | 724 | |
725 | return Interpolate(energyMeV,en,mu,kN); | |
726 | ||
727 | } | |
728 | ||
729 | //_____________________________________________________________________________ | |
cb2f9e9b | 730 | Double_t AliTRDsimTR::GetMuMy(Double_t energyMeV) |
46d29e70 | 731 | { |
732 | // | |
733 | // Returns the photon absorbtion cross section for mylar | |
734 | // | |
735 | ||
736 | const Int_t kN = 36; | |
737 | ||
738 | Double_t mu[kN] = { 2.911E+03, 9.536E+02, 4.206E+02 | |
739 | , 1.288E+02, 5.466E+01, 2.792E+01 | |
740 | , 1.608E+01, 6.750E+00, 3.481E+00 | |
741 | , 1.132E+00, 5.798E-01, 3.009E-01 | |
742 | , 2.304E-01, 2.020E-01, 1.868E-01 | |
743 | , 1.695E-01, 1.586E-01, 1.406E-01 | |
744 | , 1.282E-01, 1.111E-01, 9.947E-02 | |
745 | , 9.079E-02, 8.395E-02, 7.372E-02 | |
746 | , 6.628E-02, 5.927E-02, 5.395E-02 | |
747 | , 4.630E-02, 3.715E-02, 3.181E-02 | |
748 | , 2.829E-02, 2.582E-02, 2.257E-02 | |
749 | , 2.057E-02, 1.789E-02, 1.664E-02 }; | |
750 | ||
751 | Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03 | |
752 | , 3.00000E-03, 4.00000E-03, 5.00000E-03 | |
753 | , 6.00000E-03, 8.00000E-03, 1.00000E-02 | |
754 | , 1.50000E-02, 2.00000E-02, 3.00000E-02 | |
755 | , 4.00000E-02, 5.00000E-02, 6.00000E-02 | |
756 | , 8.00000E-02, 1.00000E-01, 1.50000E-01 | |
757 | , 2.00000E-01, 3.00000E-01, 4.00000E-01 | |
758 | , 5.00000E-01, 6.00000E-01, 8.00000E-01 | |
759 | , 1.00000E+00, 1.25000E+00, 1.50000E+00 | |
760 | , 2.00000E+00, 3.00000E+00, 4.00000E+00 | |
761 | , 5.00000E+00, 6.00000E+00, 8.00000E+00 | |
762 | , 1.00000E+01, 1.50000E+01, 2.00000E+01 }; | |
763 | ||
764 | return Interpolate(energyMeV,en,mu,kN); | |
765 | ||
766 | } | |
767 | ||
768 | //_____________________________________________________________________________ | |
cb2f9e9b | 769 | Double_t AliTRDsimTR::GetMuN2(Double_t energyMeV) |
46d29e70 | 770 | { |
771 | // | |
772 | // Returns the photon absorbtion cross section for nitrogen | |
773 | // | |
774 | ||
775 | const Int_t kN = 36; | |
776 | ||
777 | Double_t mu[kN] = { 3.311E+03, 1.083E+03, 4.769E+02 | |
778 | , 1.456E+02, 6.166E+01, 3.144E+01 | |
779 | , 1.809E+01, 7.562E+00, 3.879E+00 | |
780 | , 1.236E+00, 6.178E-01, 3.066E-01 | |
781 | , 2.288E-01, 1.980E-01, 1.817E-01 | |
782 | , 1.639E-01, 1.529E-01, 1.353E-01 | |
783 | , 1.233E-01, 1.068E-01, 9.557E-02 | |
784 | , 8.719E-02, 8.063E-02, 7.081E-02 | |
785 | , 6.364E-02, 5.693E-02, 5.180E-02 | |
786 | , 4.450E-02, 3.579E-02, 3.073E-02 | |
787 | , 2.742E-02, 2.511E-02, 2.209E-02 | |
788 | , 2.024E-02, 1.782E-02, 1.673E-02 }; | |
789 | ||
790 | Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03 | |
791 | , 3.00000E-03, 4.00000E-03, 5.00000E-03 | |
792 | , 6.00000E-03, 8.00000E-03, 1.00000E-02 | |
793 | , 1.50000E-02, 2.00000E-02, 3.00000E-02 | |
794 | , 4.00000E-02, 5.00000E-02, 6.00000E-02 | |
795 | , 8.00000E-02, 1.00000E-01, 1.50000E-01 | |
796 | , 2.00000E-01, 3.00000E-01, 4.00000E-01 | |
797 | , 5.00000E-01, 6.00000E-01, 8.00000E-01 | |
798 | , 1.00000E+00, 1.25000E+00, 1.50000E+00 | |
799 | , 2.00000E+00, 3.00000E+00, 4.00000E+00 | |
800 | , 5.00000E+00, 6.00000E+00, 8.00000E+00 | |
801 | , 1.00000E+01, 1.50000E+01, 2.00000E+01 }; | |
802 | ||
803 | return Interpolate(energyMeV,en,mu,kN); | |
804 | ||
805 | } | |
806 | ||
807 | //_____________________________________________________________________________ | |
cb2f9e9b | 808 | Double_t AliTRDsimTR::GetMuO2(Double_t energyMeV) |
46d29e70 | 809 | { |
810 | // | |
811 | // Returns the photon absorbtion cross section for oxygen | |
812 | // | |
813 | ||
814 | const Int_t kN = 36; | |
815 | ||
816 | Double_t mu[kN] = { 4.590E+03, 1.549E+03, 6.949E+02 | |
817 | , 2.171E+02, 9.315E+01, 4.790E+01 | |
818 | , 2.770E+01, 1.163E+01, 5.952E+00 | |
819 | , 1.836E+00, 8.651E-01, 3.779E-01 | |
820 | , 2.585E-01, 2.132E-01, 1.907E-01 | |
821 | , 1.678E-01, 1.551E-01, 1.361E-01 | |
822 | , 1.237E-01, 1.070E-01, 9.566E-02 | |
823 | , 8.729E-02, 8.070E-02, 7.087E-02 | |
824 | , 6.372E-02, 5.697E-02, 5.185E-02 | |
825 | , 4.459E-02, 3.597E-02, 3.100E-02 | |
826 | , 2.777E-02, 2.552E-02, 2.263E-02 | |
827 | , 2.089E-02, 1.866E-02, 1.770E-02 }; | |
828 | ||
829 | Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03 | |
830 | , 3.00000E-03, 4.00000E-03, 5.00000E-03 | |
831 | , 6.00000E-03, 8.00000E-03, 1.00000E-02 | |
832 | , 1.50000E-02, 2.00000E-02, 3.00000E-02 | |
833 | , 4.00000E-02, 5.00000E-02, 6.00000E-02 | |
834 | , 8.00000E-02, 1.00000E-01, 1.50000E-01 | |
835 | , 2.00000E-01, 3.00000E-01, 4.00000E-01 | |
836 | , 5.00000E-01, 6.00000E-01, 8.00000E-01 | |
837 | , 1.00000E+00, 1.25000E+00, 1.50000E+00 | |
838 | , 2.00000E+00, 3.00000E+00, 4.00000E+00 | |
839 | , 5.00000E+00, 6.00000E+00, 8.00000E+00 | |
840 | , 1.00000E+01, 1.50000E+01, 2.00000E+01 }; | |
841 | ||
842 | return Interpolate(energyMeV,en,mu,kN); | |
843 | ||
844 | } | |
845 | ||
846 | //_____________________________________________________________________________ | |
cb2f9e9b | 847 | Double_t AliTRDsimTR::GetMuHe(Double_t energyMeV) |
46d29e70 | 848 | { |
849 | // | |
850 | // Returns the photon absorbtion cross section for helium | |
851 | // | |
852 | ||
853 | const Int_t kN = 36; | |
854 | ||
855 | Double_t mu[kN] = { 6.084E+01, 1.676E+01, 6.863E+00 | |
856 | , 2.007E+00, 9.329E-01, 5.766E-01 | |
857 | , 4.195E-01, 2.933E-01, 2.476E-01 | |
858 | , 2.092E-01, 1.960E-01, 1.838E-01 | |
859 | , 1.763E-01, 1.703E-01, 1.651E-01 | |
860 | , 1.562E-01, 1.486E-01, 1.336E-01 | |
861 | , 1.224E-01, 1.064E-01, 9.535E-02 | |
862 | , 8.707E-02, 8.054E-02, 7.076E-02 | |
863 | , 6.362E-02, 5.688E-02, 5.173E-02 | |
864 | , 4.422E-02, 3.503E-02, 2.949E-02 | |
865 | , 2.577E-02, 2.307E-02, 1.940E-02 | |
866 | , 1.703E-02, 1.363E-02, 1.183E-02 }; | |
867 | ||
868 | Double_t en[kN] = { 1.00000E-03, 1.50000E-03, 2.00000E-03 | |
869 | , 3.00000E-03, 4.00000E-03, 5.00000E-03 | |
870 | , 6.00000E-03, 8.00000E-03, 1.00000E-02 | |
871 | , 1.50000E-02, 2.00000E-02, 3.00000E-02 | |
872 | , 4.00000E-02, 5.00000E-02, 6.00000E-02 | |
873 | , 8.00000E-02, 1.00000E-01, 1.50000E-01 | |
874 | , 2.00000E-01, 3.00000E-01, 4.00000E-01 | |
875 | , 5.00000E-01, 6.00000E-01, 8.00000E-01 | |
876 | , 1.00000E+00, 1.25000E+00, 1.50000E+00 | |
877 | , 2.00000E+00, 3.00000E+00, 4.00000E+00 | |
878 | , 5.00000E+00, 6.00000E+00, 8.00000E+00 | |
879 | , 1.00000E+01, 1.50000E+01, 2.00000E+01 }; | |
880 | ||
881 | return Interpolate(energyMeV,en,mu,kN); | |
882 | ||
883 | } | |
884 | ||
842287f2 | 885 | //_____________________________________________________________________________ |
cb2f9e9b | 886 | Double_t AliTRDsimTR::GetMuAi(Double_t energyMeV) |
842287f2 | 887 | { |
888 | // | |
889 | // Returns the photon absorbtion cross section for air | |
890 | // Implemented by Oliver Busch | |
891 | // | |
892 | ||
893 | const Int_t kN = 38; | |
894 | ||
895 | Double_t mu[kN] = { 0.35854E+04, 0.11841E+04, 0.52458E+03, | |
896 | 0.16143E+03, 0.14250E+03, 0.15722E+03, | |
897 | 0.77538E+02, 0.40099E+02, 0.23313E+02, | |
898 | 0.98816E+01, 0.51000E+01, 0.16079E+01, | |
899 | 0.77536E+00, 0.35282E+00, 0.24790E+00, | |
900 | 0.20750E+00, 0.18703E+00, 0.16589E+00, | |
901 | 0.15375E+00, 0.13530E+00, 0.12311E+00, | |
902 | 0.10654E+00, 0.95297E-01, 0.86939E-01, | |
903 | 0.80390E-01, 0.70596E-01, 0.63452E-01, | |
904 | 0.56754E-01, 0.51644E-01, 0.44382E-01, | |
905 | 0.35733E-01, 0.30721E-01, 0.27450E-01, | |
906 | 0.25171E-01, 0.22205E-01, 0.20399E-01, | |
907 | 0.18053E-01, 0.18057E-01 }; | |
908 | ||
909 | ||
910 | ||
911 | Double_t en[kN] = { 0.10000E-02, 0.15000E-02, 0.20000E-02, | |
912 | 0.30000E-02, 0.32029E-02, 0.32029E-02, | |
913 | 0.40000E-02, 0.50000E-02, 0.60000E-02, | |
914 | 0.80000E-02, 0.10000E-01, 0.15000E-01, | |
915 | 0.20000E-01, 0.30000E-01, 0.40000E-01, | |
916 | 0.50000E-01, 0.60000E-01, 0.80000E-01, | |
917 | 0.10000E+00, 0.15000E+00, 0.20000E+00, | |
918 | 0.30000E+00, 0.40000E+00, 0.50000E+00, | |
919 | 0.60000E+00, 0.80000E+00, 0.10000E+01, | |
920 | 0.12500E+01, 0.15000E+01, 0.20000E+01, | |
921 | 0.30000E+01, 0.40000E+01, 0.50000E+01, | |
922 | 0.60000E+01, 0.80000E+01, 0.10000E+02, | |
923 | 0.15000E+02, 0.20000E+02 }; | |
924 | ||
925 | return Interpolate(energyMeV,en,mu,kN); | |
926 | ||
927 | } | |
928 | ||
46d29e70 | 929 | //_____________________________________________________________________________ |
cb2f9e9b | 930 | Double_t AliTRDsimTR::Interpolate(Double_t energyMeV |
2e32a5ae | 931 | , Double_t *en |
932 | , const Double_t * const mu | |
933 | , Int_t n) | |
46d29e70 | 934 | { |
935 | // | |
936 | // Interpolates the photon absorbtion cross section | |
937 | // for a given energy <energyMeV>. | |
938 | // | |
939 | ||
940 | Double_t de = 0; | |
941 | Int_t index = 0; | |
942 | Int_t istat = Locate(en,n,energyMeV,index,de); | |
943 | if (istat == 0) { | |
944 | return (mu[index] - de * (mu[index] - mu[index+1]) | |
945 | / (en[index+1] - en[index] )); | |
946 | } | |
947 | else { | |
948 | return 0.0; | |
949 | } | |
950 | ||
951 | } | |
952 | ||
953 | //_____________________________________________________________________________ | |
cb2f9e9b | 954 | Int_t AliTRDsimTR::Locate(Double_t *xv, Int_t n, Double_t xval |
2e32a5ae | 955 | , Int_t &kl, Double_t &dx) |
46d29e70 | 956 | { |
957 | // | |
958 | // Locates a point (xval) in a 1-dim grid (xv(n)) | |
959 | // | |
960 | ||
3bc9d03e | 961 | if (xval >= xv[n-1]) { |
962 | return 1; | |
963 | } | |
964 | if (xval < xv[0]) { | |
965 | return -1; | |
966 | } | |
46d29e70 | 967 | |
968 | Int_t km; | |
969 | Int_t kh = n - 1; | |
970 | ||
971 | kl = 0; | |
972 | while (kh - kl > 1) { | |
3bc9d03e | 973 | if (xval < xv[km = (kl+kh)/2]) { |
974 | kh = km; | |
975 | } | |
976 | else { | |
977 | kl = km; | |
978 | } | |
46d29e70 | 979 | } |
3bc9d03e | 980 | if ((xval < xv[kl]) || |
981 | (xval > xv[kl+1]) || | |
982 | (kl >= n-1)) { | |
a16be6c3 | 983 | AliFatal(Form("Locate failed xv[%d] %f xval %f xv[%d] %f!!!\n" |
3bc9d03e | 984 | ,kl,xv[kl],xval,kl+1,xv[kl+1])); |
46d29e70 | 985 | exit(1); |
986 | } | |
987 | ||
988 | dx = xval - xv[kl]; | |
989 | ||
990 | return 0; | |
991 | ||
992 | } | |
0142cb22 | 993 | |
994 | //_____________________________________________________________________________ | |
c8ab4518 | 995 | Int_t AliTRDsimTR::SelectNFoils(Float_t p) const |
0142cb22 | 996 | { |
997 | // | |
998 | // Selects the number of foils corresponding to the momentum | |
999 | // | |
1000 | ||
1001 | Int_t foils = fNFoils[fNFoilsDim-1]; | |
1002 | ||
1003 | for (Int_t iFoil = 0; iFoil < fNFoilsDim; iFoil++) { | |
1004 | if (p < fNFoilsUp[iFoil]) { | |
1005 | foils = fNFoils[iFoil]; | |
1006 | break; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | return foils; | |
1011 | ||
1012 | } |