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3551db50 | 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 | /* $Id$ */ | |
17 | ||
4d18a639 | 18 | //////////////////////////////////////////////////////////////////////////// |
19 | // // | |
20 | // Class containing constant simulation parameters // | |
21 | // // | |
22 | // Request an instance with AliTRDSimParam::Instance() // | |
23 | // Then request the needed values // | |
24 | // // | |
25 | //////////////////////////////////////////////////////////////////////////// | |
3551db50 | 26 | |
27 | #include <TMath.h> | |
28 | ||
29 | #include "AliRun.h" | |
30 | ||
31 | #include "AliTRDSimParam.h" | |
32 | ||
33 | ClassImp(AliTRDSimParam) | |
34 | ||
4d18a639 | 35 | AliTRDSimParam *AliTRDSimParam::fgInstance = 0; |
36 | Bool_t AliTRDSimParam::fgTerminated = kFALSE; | |
3551db50 | 37 | |
38 | //_ singleton implementation __________________________________________________ | |
39 | AliTRDSimParam* AliTRDSimParam::Instance() | |
40 | { | |
41 | // | |
42 | // Singleton implementation | |
43 | // Returns an instance of this class, it is created if neccessary | |
44 | // | |
45 | ||
4d18a639 | 46 | if (fgTerminated != kFALSE) { |
3551db50 | 47 | return 0; |
4d18a639 | 48 | } |
3551db50 | 49 | |
4d18a639 | 50 | if (fgInstance == 0) { |
3551db50 | 51 | fgInstance = new AliTRDSimParam(); |
4d18a639 | 52 | } |
53 | ||
3551db50 | 54 | return fgInstance; |
4d18a639 | 55 | |
3551db50 | 56 | } |
57 | ||
4d18a639 | 58 | //_ singleton implementation __________________________________________________ |
3551db50 | 59 | void AliTRDSimParam::Terminate() |
60 | { | |
61 | // | |
62 | // Singleton implementation | |
4d18a639 | 63 | // Deletes the instance of this class and sets the terminated flag, |
64 | // instances cannot be requested anymore | |
3551db50 | 65 | // This function can be called several times. |
66 | // | |
67 | ||
68 | fgTerminated = kTRUE; | |
69 | ||
4d18a639 | 70 | if (fgInstance != 0) { |
3551db50 | 71 | delete fgInstance; |
72 | fgInstance = 0; | |
73 | } | |
4d18a639 | 74 | |
3551db50 | 75 | } |
76 | ||
77 | //_____________________________________________________________________________ | |
78 | AliTRDSimParam::AliTRDSimParam() | |
4d18a639 | 79 | :TObject() |
80 | ,fGasGain(0.0) | |
81 | ,fNoise(0.0) | |
82 | ,fChipGain(0.0) | |
83 | ,fADCoutRange(0.0) | |
84 | ,fADCinRange(0.0) | |
85 | ,fADCthreshold(0) | |
86 | ,fADCbaseline(0) | |
87 | ,fDiffusionOn(kFALSE) | |
88 | ,fElAttachOn(kFALSE) | |
89 | ,fElAttachProp(0.0) | |
90 | ,fTRFOn(kFALSE) | |
91 | ,fTRFsmp(0) | |
92 | ,fTRFbin(0) | |
93 | ,fTRFlo(0.0) | |
94 | ,fTRFhi(0.0) | |
95 | ,fTRFwid(0.0) | |
96 | ,fCTOn(kFALSE) | |
97 | ,fCTsmp(0) | |
98 | ,fAnodeWireOffset(0.0) | |
99 | ,fPadCoupling(0.0) | |
100 | ,fTimeCoupling(0.0) | |
101 | ,fTimeStructOn(kFALSE) | |
102 | ,fPRFOn(kFALSE) | |
3551db50 | 103 | { |
104 | // | |
4d18a639 | 105 | // Default constructor |
3551db50 | 106 | // |
107 | ||
3551db50 | 108 | Init(); |
4d18a639 | 109 | |
3551db50 | 110 | } |
111 | ||
112 | //_____________________________________________________________________________ | |
113 | void AliTRDSimParam::Init() | |
114 | { | |
115 | // | |
4d18a639 | 116 | // Default initializiation |
3551db50 | 117 | // |
118 | ||
119 | // The default parameter for the digitization | |
b43a3e17 | 120 | fGasGain = 4000.0; |
121 | fChipGain = 12.4; | |
60243ea4 | 122 | fNoise = 1250.0; |
b43a3e17 | 123 | fADCoutRange = 1023.0; // 10-bit ADC |
124 | fADCinRange = 2000.0; // 2V input range | |
125 | fADCthreshold = 3; | |
c2798013 | 126 | // Go back to 0 again, just to be consistent with reconstruction |
127 | fADCbaseline = 0; | |
128 | //fADCbaseline = 10; | |
3551db50 | 129 | |
130 | // Diffusion on | |
b43a3e17 | 131 | fDiffusionOn = kTRUE; |
3551db50 | 132 | |
133 | // Propability for electron attachment | |
b43a3e17 | 134 | fElAttachOn = kFALSE; |
135 | fElAttachProp = 0.0; | |
3551db50 | 136 | |
137 | // The time response function | |
b43a3e17 | 138 | fTRFOn = kTRUE; |
3551db50 | 139 | |
140 | // The cross talk | |
b43a3e17 | 141 | fCTOn = kTRUE; |
3551db50 | 142 | |
3551db50 | 143 | // The pad coupling factor |
4d18a639 | 144 | // Use 0.46, instead of the theroetical value 0.3, since it reproduces better |
145 | // the test beam data, even tough it is not understood why. | |
b43a3e17 | 146 | fPadCoupling = 0.46; |
3551db50 | 147 | |
148 | // The time coupling factor (same number as for the TPC) | |
b43a3e17 | 149 | fTimeCoupling = 0.4; |
3551db50 | 150 | |
151 | // Distance of first Anode wire from first pad edge | |
b43a3e17 | 152 | fAnodeWireOffset = 0.25; |
3551db50 | 153 | |
154 | // Use drift time maps | |
b43a3e17 | 155 | fTimeStructOn = kTRUE; |
3551db50 | 156 | |
cc7cef99 | 157 | // The pad response function |
b43a3e17 | 158 | fPRFOn = kTRUE; |
cc7cef99 | 159 | |
3551db50 | 160 | ReInit(); |
4d18a639 | 161 | |
ab0a4106 | 162 | } |
3551db50 | 163 | |
164 | //_____________________________________________________________________________ | |
165 | AliTRDSimParam::~AliTRDSimParam() | |
166 | { | |
167 | // | |
4d18a639 | 168 | // Destructor |
3551db50 | 169 | // |
170 | ||
171 | if (fTRFsmp) { | |
172 | delete [] fTRFsmp; | |
173 | fTRFsmp = 0; | |
174 | } | |
175 | ||
176 | if (fCTsmp) { | |
177 | delete [] fCTsmp; | |
178 | fCTsmp = 0; | |
179 | } | |
4d18a639 | 180 | |
ab0a4106 | 181 | } |
3551db50 | 182 | |
183 | //_____________________________________________________________________________ | |
4d18a639 | 184 | AliTRDSimParam::AliTRDSimParam(const AliTRDSimParam &p) |
185 | :TObject(p) | |
186 | ,fGasGain(p.fGasGain) | |
187 | ,fNoise(p.fNoise) | |
188 | ,fChipGain(p.fChipGain) | |
189 | ,fADCoutRange(p.fADCoutRange) | |
190 | ,fADCinRange(p.fADCinRange) | |
191 | ,fADCthreshold(p.fADCthreshold) | |
192 | ,fADCbaseline(p.fADCbaseline) | |
193 | ,fDiffusionOn(p.fDiffusionOn) | |
194 | ,fElAttachOn(p.fElAttachOn) | |
195 | ,fElAttachProp(p.fElAttachProp) | |
196 | ,fTRFOn(p.fTRFOn) | |
197 | ,fTRFsmp(0) | |
198 | ,fTRFbin(p.fTRFbin) | |
199 | ,fTRFlo(p.fTRFlo) | |
200 | ,fTRFhi(p.fTRFhi) | |
201 | ,fTRFwid(p.fTRFwid) | |
202 | ,fCTOn(p.fCTOn) | |
203 | ,fCTsmp(0) | |
204 | ,fAnodeWireOffset(p.fAnodeWireOffset) | |
205 | ,fPadCoupling(p.fPadCoupling) | |
206 | ,fTimeCoupling(p.fTimeCoupling) | |
207 | ,fTimeStructOn(p.fTimeStructOn) | |
208 | ,fPRFOn(p.fPRFOn) | |
3551db50 | 209 | { |
210 | // | |
4d18a639 | 211 | // Copy constructor |
3551db50 | 212 | // |
213 | ||
4d18a639 | 214 | Int_t iBin = 0; |
215 | ||
216 | if (((AliTRDSimParam &) p).fTRFsmp) { | |
217 | delete [] ((AliTRDSimParam &) p).fTRFsmp; | |
218 | } | |
219 | ((AliTRDSimParam &) p).fTRFsmp = new Float_t[fTRFbin]; | |
220 | for (iBin = 0; iBin < fTRFbin; iBin++) { | |
221 | ((AliTRDSimParam &) p).fTRFsmp[iBin] = fTRFsmp[iBin]; | |
222 | } | |
223 | ||
224 | if (((AliTRDSimParam &) p).fCTsmp) { | |
225 | delete [] ((AliTRDSimParam &) p).fCTsmp; | |
226 | } | |
227 | ((AliTRDSimParam &) p).fCTsmp = new Float_t[fTRFbin]; | |
228 | for (iBin = 0; iBin < fTRFbin; iBin++) { | |
229 | ((AliTRDSimParam &) p).fCTsmp[iBin] = fCTsmp[iBin]; | |
230 | } | |
3551db50 | 231 | |
4d18a639 | 232 | } |
3551db50 | 233 | |
234 | //_____________________________________________________________________________ | |
235 | AliTRDSimParam &AliTRDSimParam::operator=(const AliTRDSimParam &p) | |
236 | { | |
237 | // | |
238 | // Assignment operator | |
239 | // | |
240 | ||
b43a3e17 | 241 | if (this != &p) { |
242 | ((AliTRDSimParam &) p).Copy(*this); | |
243 | } | |
4d18a639 | 244 | |
3551db50 | 245 | return *this; |
4d18a639 | 246 | |
3551db50 | 247 | } |
248 | ||
249 | //_____________________________________________________________________________ | |
250 | void AliTRDSimParam::Copy(TObject &p) const | |
251 | { | |
252 | // | |
253 | // Copy function | |
254 | // | |
255 | ||
b43a3e17 | 256 | AliTRDSimParam *target = dynamic_cast<AliTRDSimParam *> (&p); |
4d18a639 | 257 | if (!target) { |
3551db50 | 258 | return; |
4d18a639 | 259 | } |
3551db50 | 260 | |
261 | target->fGasGain = fGasGain; | |
3551db50 | 262 | target->fNoise = fNoise; |
4d18a639 | 263 | target->fChipGain = fChipGain; |
3551db50 | 264 | target->fADCoutRange = fADCoutRange; |
265 | target->fADCinRange = fADCinRange; | |
266 | target->fADCthreshold = fADCthreshold; | |
267 | target->fADCbaseline = fADCbaseline; | |
3551db50 | 268 | target->fDiffusionOn = fDiffusionOn; |
3551db50 | 269 | target->fElAttachOn = fElAttachOn; |
270 | target->fElAttachProp = fElAttachProp; | |
3551db50 | 271 | target->fTRFOn = fTRFOn; |
3551db50 | 272 | target->fTRFbin = fTRFbin; |
273 | target->fTRFlo = fTRFlo; | |
274 | target->fTRFhi = fTRFhi; | |
275 | target->fTRFwid = fTRFwid; | |
3551db50 | 276 | target->fCTOn = fCTOn; |
4d18a639 | 277 | target->fAnodeWireOffset = fAnodeWireOffset; |
278 | target->fPadCoupling = fPadCoupling; | |
279 | target->fTimeCoupling = fTimeCoupling; | |
280 | target->fPRFOn = fPRFOn; | |
281 | ||
282 | if (target->fTRFsmp) { | |
283 | delete[] target->fTRFsmp; | |
284 | } | |
285 | target->fTRFsmp = new Float_t[fTRFbin]; | |
286 | for (Int_t iBin = 0; iBin < fTRFbin; iBin++) { | |
287 | target->fTRFsmp[iBin] = fTRFsmp[iBin]; | |
288 | } | |
289 | ||
290 | if (target->fCTsmp) { | |
3551db50 | 291 | delete[] target->fCTsmp; |
4d18a639 | 292 | } |
3551db50 | 293 | target->fCTsmp = new Float_t[fTRFbin]; |
294 | for (Int_t iBin = 0; iBin < fTRFbin; iBin++) { | |
295 | target->fCTsmp[iBin] = fCTsmp[iBin]; | |
296 | } | |
297 | ||
3551db50 | 298 | } |
299 | ||
300 | //_____________________________________________________________________________ | |
301 | void AliTRDSimParam::ReInit() | |
302 | { | |
303 | // | |
304 | // Reinitializes the parameter class after a change | |
305 | // | |
306 | ||
307 | // The range and the binwidth for the sampled TRF | |
915f999b | 308 | fTRFbin = 200; |
3551db50 | 309 | // Start 0.2 mus before the signal |
915f999b | 310 | fTRFlo = -0.4; |
3551db50 | 311 | // End the maximum drift time after the signal |
4d18a639 | 312 | fTRFhi = 3.58; |
3551db50 | 313 | fTRFwid = (fTRFhi - fTRFlo) / ((Float_t) fTRFbin); |
314 | ||
315 | // Create the sampled TRF | |
316 | SampleTRF(); | |
3551db50 | 317 | |
4d18a639 | 318 | } |
915f999b | 319 | |
3551db50 | 320 | //_____________________________________________________________________________ |
321 | void AliTRDSimParam::SampleTRF() | |
322 | { | |
323 | // | |
915f999b | 324 | // Samples the new time response function. |
325 | // From Antons measurements with Fe55 source, adjusted by C. Lippmann. | |
326 | // time bins are -0.4, -0.38, -0.36, ...., 3.54, 3.56, 3.58 microseconds | |
3551db50 | 327 | // |
328 | ||
915f999b | 329 | const Int_t kNpasa = 200; // kNpasa should be equal to fTRFbin! |
330 | ||
4d18a639 | 331 | Float_t signal[kNpasa]={ 0.0000, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000, 0.0000 |
332 | , 0.0002, 0.0007, 0.0026, 0.0089, 0.0253, 0.0612, 0.1319 | |
333 | , 0.2416, 0.3913, 0.5609, 0.7295, 0.8662, 0.9581, 1.0000 | |
334 | , 0.9990, 0.9611, 0.8995, 0.8269, 0.7495, 0.6714, 0.5987 | |
335 | , 0.5334, 0.4756, 0.4249, 0.3811, 0.3433, 0.3110, 0.2837 | |
336 | , 0.2607, 0.2409, 0.2243, 0.2099, 0.1974, 0.1868, 0.1776 | |
337 | , 0.1695, 0.1627, 0.1566, 0.1509, 0.1457, 0.1407, 0.1362 | |
338 | , 0.1317, 0.1274, 0.1233, 0.1196, 0.1162, 0.1131, 0.1102 | |
339 | , 0.1075, 0.1051, 0.1026, 0.1004, 0.0979, 0.0956, 0.0934 | |
340 | , 0.0912, 0.0892, 0.0875, 0.0858, 0.0843, 0.0829, 0.0815 | |
341 | , 0.0799, 0.0786, 0.0772, 0.0757, 0.0741, 0.0729, 0.0718 | |
342 | , 0.0706, 0.0692, 0.0680, 0.0669, 0.0655, 0.0643, 0.0630 | |
343 | , 0.0618, 0.0607, 0.0596, 0.0587, 0.0576, 0.0568, 0.0558 | |
344 | , 0.0550, 0.0541, 0.0531, 0.0522, 0.0513, 0.0505, 0.0497 | |
345 | , 0.0490, 0.0484, 0.0474, 0.0465, 0.0457, 0.0449, 0.0441 | |
346 | , 0.0433, 0.0425, 0.0417, 0.0410, 0.0402, 0.0395, 0.0388 | |
347 | , 0.0381, 0.0374, 0.0368, 0.0361, 0.0354, 0.0348, 0.0342 | |
348 | , 0.0336, 0.0330, 0.0324, 0.0318, 0.0312, 0.0306, 0.0301 | |
349 | , 0.0296, 0.0290, 0.0285, 0.0280, 0.0275, 0.0270, 0.0265 | |
350 | , 0.0260, 0.0256, 0.0251, 0.0246, 0.0242, 0.0238, 0.0233 | |
351 | , 0.0229, 0.0225, 0.0221, 0.0217, 0.0213, 0.0209, 0.0206 | |
352 | , 0.0202, 0.0198, 0.0195, 0.0191, 0.0188, 0.0184, 0.0181 | |
353 | , 0.0178, 0.0175, 0.0171, 0.0168, 0.0165, 0.0162, 0.0159 | |
354 | , 0.0157, 0.0154, 0.0151, 0.0148, 0.0146, 0.0143, 0.0140 | |
355 | , 0.0138, 0.0135, 0.0133, 0.0131, 0.0128, 0.0126, 0.0124 | |
356 | , 0.0121, 0.0119, 0.0120, 0.0115, 0.0113, 0.0111, 0.0109 | |
357 | , 0.0107, 0.0105, 0.0103, 0.0101, 0.0100, 0.0098, 0.0096 | |
358 | , 0.0094, 0.0092, 0.0091, 0.0089, 0.0088, 0.0086, 0.0084 | |
359 | , 0.0083, 0.0081, 0.0080, 0.0078 }; | |
915f999b | 360 | |
361 | Float_t xtalk[kNpasa]; | |
362 | ||
4d18a639 | 363 | // With undershoot, positive peak corresponds to ~3% of the main signal: |
915f999b | 364 | for (Int_t ipasa = 3; ipasa < kNpasa; ipasa++) { |
4d18a639 | 365 | xtalk[ipasa] = 0.2 * (signal[ipasa-2] - signal[ipasa-3]); |
3551db50 | 366 | } |
367 | ||
4d18a639 | 368 | xtalk[0] = 0.0; |
369 | xtalk[1] = 0.0; | |
370 | xtalk[2] = 0.0; | |
915f999b | 371 | |
4d18a639 | 372 | signal[0] = 0.0; |
373 | signal[1] = 0.0; | |
374 | signal[2] = 0.0; | |
375 | ||
376 | if (fTRFsmp) { | |
377 | delete [] fTRFsmp; | |
378 | } | |
3551db50 | 379 | fTRFsmp = new Float_t[fTRFbin]; |
4d18a639 | 380 | |
381 | if (fCTsmp) { | |
382 | delete [] fCTsmp; | |
383 | } | |
3551db50 | 384 | fCTsmp = new Float_t[fTRFbin]; |
385 | ||
3551db50 | 386 | for (Int_t iBin = 0; iBin < fTRFbin; iBin++) { |
915f999b | 387 | fTRFsmp[iBin] = signal[iBin]; |
388 | fCTsmp[iBin] = xtalk[iBin]; | |
3551db50 | 389 | } |
390 | ||
391 | } | |
392 | ||
393 | //_____________________________________________________________________________ | |
394 | Double_t AliTRDSimParam::TimeResponse(Double_t time) const | |
395 | { | |
396 | // | |
397 | // Applies the preamp shaper time response | |
915f999b | 398 | // (We assume a signal rise time of 0.2us = fTRFlo/2. |
3551db50 | 399 | // |
400 | ||
4d18a639 | 401 | Int_t iBin = ((Int_t) ((time - fTRFlo/2.0) / fTRFwid)); |
402 | if ((iBin >= 0) && | |
403 | (iBin < fTRFbin)) { | |
3551db50 | 404 | return fTRFsmp[iBin]; |
405 | } | |
406 | else { | |
407 | return 0.0; | |
408 | } | |
409 | ||
410 | } | |
411 | ||
412 | //_____________________________________________________________________________ | |
413 | Double_t AliTRDSimParam::CrossTalk(Double_t time) const | |
414 | { | |
415 | // | |
416 | // Applies the pad-pad capacitive cross talk | |
417 | // | |
418 | ||
419 | Int_t iBin = ((Int_t) ((time - fTRFlo) / fTRFwid)); | |
4d18a639 | 420 | if ((iBin >= 0) && |
421 | (iBin < fTRFbin)) { | |
3551db50 | 422 | return fCTsmp[iBin]; |
423 | } | |
424 | else { | |
425 | return 0.0; | |
426 | } | |
427 | ||
428 | } |