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f7336fa3 | 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 | /* | |
17 | $Log$ | |
16bf9884 | 18 | Revision 1.25 2001/06/27 09:54:44 cblume |
19 | Moved fField initialization to InitDetector() | |
20 | ||
88fd7ccb | 21 | Revision 1.24 2001/05/21 16:45:47 hristov |
22 | Last minute changes (C.Blume) | |
23 | ||
db30bf0f | 24 | Revision 1.23 2001/05/07 08:04:48 cblume |
25 | New TRF and PRF. Speedup of the code. Digits from amplification region included | |
26 | ||
872a7aba | 27 | Revision 1.22 2001/03/30 14:40:14 cblume |
28 | Update of the digitization parameter | |
29 | ||
a3c76cdc | 30 | Revision 1.21 2001/03/13 09:30:35 cblume |
31 | Update of digitization. Moved digit branch definition to AliTRD | |
32 | ||
6244debe | 33 | Revision 1.20 2001/02/25 20:19:00 hristov |
34 | Minor correction: loop variable declared only once for HP, Sun | |
35 | ||
c3a4830f | 36 | Revision 1.19 2001/02/14 18:22:26 cblume |
37 | Change in the geometry of the padplane | |
38 | ||
71d9fa7b | 39 | Revision 1.18 2001/01/26 19:56:57 hristov |
40 | Major upgrade of AliRoot code | |
41 | ||
2ab0c725 | 42 | Revision 1.17 2000/12/08 12:53:27 cblume |
43 | Change in Copy() function for HP-compiler | |
44 | ||
1948ba0c | 45 | Revision 1.16 2000/12/07 12:20:46 cblume |
46 | Go back to array compression. Use sampled PRF to speed up digitization | |
47 | ||
e153aaf6 | 48 | Revision 1.15 2000/11/23 14:34:08 cblume |
49 | Fixed bug in expansion routine of arrays (initialize buffers properly) | |
50 | ||
259b9e4b | 51 | Revision 1.14 2000/11/20 08:54:44 cblume |
52 | Switch off compression as default | |
53 | ||
c1e4b257 | 54 | Revision 1.13 2000/11/10 14:57:52 cblume |
55 | Changes in the geometry constants for the DEC compiler | |
56 | ||
dd56b762 | 57 | Revision 1.12 2000/11/01 14:53:20 cblume |
58 | Merge with TRD-develop | |
59 | ||
793ff80c | 60 | Revision 1.1.4.9 2000/10/26 17:00:22 cblume |
61 | Fixed bug in CheckDetector() | |
62 | ||
63 | Revision 1.1.4.8 2000/10/23 13:41:35 cblume | |
64 | Added protection against Log(0) in the gas gain calulation | |
65 | ||
66 | Revision 1.1.4.7 2000/10/17 02:27:34 cblume | |
67 | Get rid of global constants | |
68 | ||
69 | Revision 1.1.4.6 2000/10/16 01:16:53 cblume | |
70 | Changed timebin 0 to be the one closest to the readout | |
71 | ||
72 | Revision 1.1.4.5 2000/10/15 23:34:29 cblume | |
73 | Faster version of the digitizer | |
74 | ||
75 | Revision 1.1.4.4 2000/10/06 16:49:46 cblume | |
76 | Made Getters const | |
77 | ||
78 | Revision 1.1.4.3 2000/10/04 16:34:58 cblume | |
79 | Replace include files by forward declarations | |
80 | ||
81 | Revision 1.1.4.2 2000/09/22 14:41:10 cblume | |
82 | Bug fix in PRF. Included time response. New structure | |
83 | ||
eda4336d | 84 | Revision 1.10 2000/10/05 07:27:53 cblume |
85 | Changes in the header-files by FCA | |
86 | ||
6798b56e | 87 | Revision 1.9 2000/10/02 21:28:19 fca |
88 | Removal of useless dependecies via forward declarations | |
89 | ||
94de3818 | 90 | Revision 1.8 2000/06/09 11:10:07 cblume |
91 | Compiler warnings and coding conventions, next round | |
92 | ||
dd9a6ee3 | 93 | Revision 1.7 2000/06/08 18:32:58 cblume |
94 | Make code compliant to coding conventions | |
95 | ||
8230f242 | 96 | Revision 1.6 2000/06/07 16:27:32 cblume |
97 | Try to remove compiler warnings on Sun and HP | |
98 | ||
9d0b222b | 99 | Revision 1.5 2000/05/09 16:38:57 cblume |
100 | Removed PadResponse(). Merge problem | |
101 | ||
f0a7bf65 | 102 | Revision 1.4 2000/05/08 15:53:45 cblume |
103 | Resolved merge conflict | |
104 | ||
da581aea | 105 | Revision 1.3 2000/04/28 14:49:27 cblume |
106 | Only one declaration of iDict in MakeDigits() | |
107 | ||
108 | Revision 1.1.4.1 2000/05/08 14:42:04 cblume | |
109 | Introduced AliTRDdigitsManager | |
28329a48 | 110 | |
1befd3b2 | 111 | Revision 1.1 2000/02/28 19:00:13 cblume |
112 | Add new TRD classes | |
113 | ||
f7336fa3 | 114 | */ |
115 | ||
116 | /////////////////////////////////////////////////////////////////////////////// | |
117 | // // | |
118 | // Creates and handles digits from TRD hits // | |
119 | // // | |
120 | // The following effects are included: // | |
121 | // - Diffusion // | |
122 | // - ExB effects // | |
123 | // - Gas gain including fluctuations // | |
124 | // - Pad-response (simple Gaussian approximation) // | |
125 | // - Electronics noise // | |
126 | // - Electronics gain // | |
127 | // - Digitization // | |
128 | // - ADC threshold // | |
129 | // The corresponding parameter can be adjusted via the various // | |
130 | // Set-functions. If these parameters are not explicitly set, default // | |
131 | // values are used (see Init-function). // | |
132 | // To produce digits from a root-file with TRD-hits use the // | |
133 | // slowDigitsCreate.C macro. // | |
134 | // // | |
135 | /////////////////////////////////////////////////////////////////////////////// | |
136 | ||
6798b56e | 137 | #include <stdlib.h> |
138 | ||
f7336fa3 | 139 | #include <TMath.h> |
140 | #include <TVector.h> | |
141 | #include <TRandom.h> | |
94de3818 | 142 | #include <TROOT.h> |
143 | #include <TTree.h> | |
793ff80c | 144 | #include <TFile.h> |
145 | #include <TF1.h> | |
146 | ||
147 | #include "AliRun.h" | |
db30bf0f | 148 | #include "AliMagF.h" |
f7336fa3 | 149 | |
150 | #include "AliTRD.h" | |
793ff80c | 151 | #include "AliTRDhit.h" |
f7336fa3 | 152 | #include "AliTRDdigitizer.h" |
da581aea | 153 | #include "AliTRDdataArrayI.h" |
154 | #include "AliTRDdataArrayF.h" | |
793ff80c | 155 | #include "AliTRDsegmentArray.h" |
da581aea | 156 | #include "AliTRDdigitsManager.h" |
793ff80c | 157 | #include "AliTRDgeometry.h" |
f7336fa3 | 158 | |
159 | ClassImp(AliTRDdigitizer) | |
160 | ||
161 | //_____________________________________________________________________________ | |
162 | AliTRDdigitizer::AliTRDdigitizer():TNamed() | |
163 | { | |
164 | // | |
165 | // AliTRDdigitizer default constructor | |
166 | // | |
167 | ||
6244debe | 168 | fInputFile = NULL; |
169 | fDigits = NULL; | |
170 | fTRD = NULL; | |
171 | fGeo = NULL; | |
6244debe | 172 | fPRFsmp = NULL; |
872a7aba | 173 | fTRFsmp = NULL; |
6244debe | 174 | |
175 | fEvent = 0; | |
176 | fGasGain = 0.0; | |
177 | fNoise = 0.0; | |
178 | fChipGain = 0.0; | |
179 | fSinRange = 0.0; | |
180 | fSoutRange = 0.0; | |
181 | fADCoutRange = 0.0; | |
182 | fADCinRange = 0.0; | |
183 | fADCthreshold = 0; | |
184 | fDiffusionOn = 0; | |
185 | fDiffusionT = 0.0; | |
186 | fDiffusionL = 0.0; | |
187 | fElAttachOn = 0; | |
188 | fElAttachProp = 0.0; | |
189 | fExBOn = 0; | |
190 | fOmegaTau = 0.0; | |
191 | fPRFOn = 0; | |
192 | fTRFOn = 0; | |
193 | fDriftVelocity = 0.0; | |
194 | fPadCoupling = 0.0; | |
195 | fTimeCoupling = 0.0; | |
196 | fTimeBinWidth = 0.0; | |
db30bf0f | 197 | fField = 0.0; |
6244debe | 198 | |
199 | fPRFbin = 0; | |
200 | fPRFlo = 0.0; | |
201 | fPRFhi = 0.0; | |
202 | fPRFwid = 0.0; | |
203 | fPRFpad = 0; | |
204 | fTRFbin = 0; | |
205 | fTRFlo = 0.0; | |
206 | fTRFhi = 0.0; | |
207 | fTRFwid = 0.0; | |
208 | ||
209 | fCompress = kTRUE; | |
210 | fVerbose = 1; | |
211 | fSDigits = kFALSE; | |
f7336fa3 | 212 | |
213 | } | |
214 | ||
215 | //_____________________________________________________________________________ | |
216 | AliTRDdigitizer::AliTRDdigitizer(const Text_t *name, const Text_t *title) | |
217 | :TNamed(name,title) | |
218 | { | |
219 | // | |
220 | // AliTRDdigitizer default constructor | |
221 | // | |
222 | ||
da581aea | 223 | fInputFile = NULL; |
224 | fDigits = NULL; | |
225 | fTRD = NULL; | |
226 | fGeo = NULL; | |
e153aaf6 | 227 | fPRFsmp = NULL; |
872a7aba | 228 | fTRFsmp = NULL; |
f7336fa3 | 229 | |
da581aea | 230 | fEvent = 0; |
f7336fa3 | 231 | |
e153aaf6 | 232 | fCompress = kTRUE; |
793ff80c | 233 | fVerbose = 1; |
6244debe | 234 | fSDigits = kFALSE; |
793ff80c | 235 | |
f7336fa3 | 236 | Init(); |
237 | ||
238 | } | |
239 | ||
8230f242 | 240 | //_____________________________________________________________________________ |
dd9a6ee3 | 241 | AliTRDdigitizer::AliTRDdigitizer(const AliTRDdigitizer &d) |
8230f242 | 242 | { |
243 | // | |
244 | // AliTRDdigitizer copy constructor | |
245 | // | |
246 | ||
dd9a6ee3 | 247 | ((AliTRDdigitizer &) d).Copy(*this); |
8230f242 | 248 | |
249 | } | |
250 | ||
f7336fa3 | 251 | //_____________________________________________________________________________ |
252 | AliTRDdigitizer::~AliTRDdigitizer() | |
253 | { | |
8230f242 | 254 | // |
255 | // AliTRDdigitizer destructor | |
256 | // | |
f7336fa3 | 257 | |
258 | if (fInputFile) { | |
259 | fInputFile->Close(); | |
260 | delete fInputFile; | |
261 | } | |
262 | ||
da581aea | 263 | if (fDigits) { |
264 | delete fDigits; | |
f7336fa3 | 265 | } |
266 | ||
f7336fa3 | 267 | } |
268 | ||
8230f242 | 269 | //_____________________________________________________________________________ |
dd9a6ee3 | 270 | AliTRDdigitizer &AliTRDdigitizer::operator=(const AliTRDdigitizer &d) |
271 | { | |
272 | // | |
273 | // Assignment operator | |
274 | // | |
275 | ||
276 | if (this != &d) ((AliTRDdigitizer &) d).Copy(*this); | |
277 | return *this; | |
278 | ||
279 | } | |
280 | ||
281 | //_____________________________________________________________________________ | |
282 | void AliTRDdigitizer::Copy(TObject &d) | |
8230f242 | 283 | { |
284 | // | |
285 | // Copy function | |
286 | // | |
287 | ||
1948ba0c | 288 | Int_t iBin; |
289 | ||
6244debe | 290 | ((AliTRDdigitizer &) d).fInputFile = NULL; |
291 | ((AliTRDdigitizer &) d).fDigits = NULL; | |
292 | ((AliTRDdigitizer &) d).fTRD = NULL; | |
293 | ((AliTRDdigitizer &) d).fGeo = NULL; | |
294 | ||
295 | ((AliTRDdigitizer &) d).fEvent = 0; | |
296 | ||
297 | ((AliTRDdigitizer &) d).fGasGain = fGasGain; | |
298 | ((AliTRDdigitizer &) d).fNoise = fNoise; | |
299 | ((AliTRDdigitizer &) d).fChipGain = fChipGain; | |
300 | ((AliTRDdigitizer &) d).fSoutRange = fSoutRange; | |
301 | ((AliTRDdigitizer &) d).fSinRange = fSinRange; | |
302 | ((AliTRDdigitizer &) d).fADCoutRange = fADCoutRange; | |
303 | ((AliTRDdigitizer &) d).fADCinRange = fADCinRange; | |
304 | ((AliTRDdigitizer &) d).fADCthreshold = fADCthreshold; | |
305 | ((AliTRDdigitizer &) d).fDiffusionOn = fDiffusionOn; | |
306 | ((AliTRDdigitizer &) d).fDiffusionT = fDiffusionT; | |
307 | ((AliTRDdigitizer &) d).fDiffusionL = fDiffusionL; | |
308 | ((AliTRDdigitizer &) d).fElAttachOn = fElAttachOn; | |
309 | ((AliTRDdigitizer &) d).fElAttachProp = fElAttachProp; | |
310 | ((AliTRDdigitizer &) d).fExBOn = fExBOn; | |
311 | ((AliTRDdigitizer &) d).fOmegaTau = fOmegaTau; | |
312 | ((AliTRDdigitizer &) d).fLorentzFactor = fLorentzFactor; | |
313 | ((AliTRDdigitizer &) d).fDriftVelocity = fDriftVelocity; | |
314 | ((AliTRDdigitizer &) d).fPadCoupling = fPadCoupling; | |
315 | ((AliTRDdigitizer &) d).fTimeCoupling = fTimeCoupling; | |
316 | ((AliTRDdigitizer &) d).fTimeBinWidth = fTimeBinWidth; | |
db30bf0f | 317 | ((AliTRDdigitizer &) d).fField = fField; |
6244debe | 318 | ((AliTRDdigitizer &) d).fPRFOn = fPRFOn; |
319 | ((AliTRDdigitizer &) d).fTRFOn = fTRFOn; | |
320 | ||
321 | ((AliTRDdigitizer &) d).fCompress = fCompress; | |
322 | ((AliTRDdigitizer &) d).fVerbose = fVerbose; | |
323 | ((AliTRDdigitizer &) d).fSDigits = fSDigits; | |
dd9a6ee3 | 324 | |
6244debe | 325 | ((AliTRDdigitizer &) d).fPRFbin = fPRFbin; |
326 | ((AliTRDdigitizer &) d).fPRFlo = fPRFlo; | |
327 | ((AliTRDdigitizer &) d).fPRFhi = fPRFhi; | |
328 | ((AliTRDdigitizer &) d).fPRFwid = fPRFwid; | |
329 | ((AliTRDdigitizer &) d).fPRFpad = fPRFpad; | |
e153aaf6 | 330 | if (((AliTRDdigitizer &) d).fPRFsmp) delete ((AliTRDdigitizer &) d).fPRFsmp; |
331 | ((AliTRDdigitizer &) d).fPRFsmp = new Float_t[fPRFbin]; | |
1948ba0c | 332 | for (iBin = 0; iBin < fPRFbin; iBin++) { |
e153aaf6 | 333 | ((AliTRDdigitizer &) d).fPRFsmp[iBin] = fPRFsmp[iBin]; |
334 | } | |
6244debe | 335 | ((AliTRDdigitizer &) d).fTRFbin = fTRFbin; |
336 | ((AliTRDdigitizer &) d).fTRFlo = fTRFlo; | |
337 | ((AliTRDdigitizer &) d).fTRFhi = fTRFhi; | |
338 | ((AliTRDdigitizer &) d).fTRFwid = fTRFwid; | |
872a7aba | 339 | if (((AliTRDdigitizer &) d).fTRFsmp) delete ((AliTRDdigitizer &) d).fTRFsmp; |
340 | ((AliTRDdigitizer &) d).fTRFsmp = new Float_t[fTRFbin]; | |
1948ba0c | 341 | for (iBin = 0; iBin < fTRFbin; iBin++) { |
872a7aba | 342 | ((AliTRDdigitizer &) d).fTRFsmp[iBin] = fTRFsmp[iBin]; |
6244debe | 343 | } |
344 | ||
8230f242 | 345 | } |
346 | ||
f7336fa3 | 347 | //_____________________________________________________________________________ |
348 | Int_t AliTRDdigitizer::Diffusion(Float_t driftlength, Float_t *xyz) | |
349 | { | |
350 | // | |
351 | // Applies the diffusion smearing to the position of a single electron | |
352 | // | |
353 | ||
354 | Float_t driftSqrt = TMath::Sqrt(driftlength); | |
355 | Float_t sigmaT = driftSqrt * fDiffusionT; | |
356 | Float_t sigmaL = driftSqrt * fDiffusionL; | |
357 | xyz[0] = gRandom->Gaus(xyz[0], sigmaL * fLorentzFactor); | |
358 | xyz[1] = gRandom->Gaus(xyz[1], sigmaT * fLorentzFactor); | |
359 | xyz[2] = gRandom->Gaus(xyz[2], sigmaT); | |
793ff80c | 360 | |
f7336fa3 | 361 | return 1; |
362 | ||
363 | } | |
364 | ||
365 | //_____________________________________________________________________________ | |
366 | Int_t AliTRDdigitizer::ExB(Float_t driftlength, Float_t *xyz) | |
367 | { | |
368 | // | |
369 | // Applies E x B effects to the position of a single electron | |
370 | // | |
371 | ||
372 | xyz[0] = xyz[0]; | |
793ff80c | 373 | xyz[1] = xyz[1] + fOmegaTau * driftlength; |
f7336fa3 | 374 | xyz[2] = xyz[2]; |
375 | ||
376 | return 1; | |
377 | ||
378 | } | |
379 | ||
793ff80c | 380 | //_____________________________________________________________________________ |
381 | Int_t AliTRDdigitizer::PadResponse(Float_t signal, Float_t dist, Float_t *pad) | |
382 | { | |
383 | // | |
384 | // Applies the pad response | |
385 | // | |
386 | ||
e153aaf6 | 387 | Int_t iBin = ((Int_t) (( - dist - fPRFlo) / fPRFwid)); |
388 | ||
389 | Int_t iBin0 = iBin - fPRFpad; | |
390 | Int_t iBin1 = iBin; | |
391 | Int_t iBin2 = iBin + fPRFpad; | |
392 | ||
393 | if ((iBin0 >= 0) && (iBin2 < fPRFbin)) { | |
394 | ||
395 | pad[0] = signal * fPRFsmp[iBin0]; | |
396 | pad[1] = signal * fPRFsmp[iBin1]; | |
397 | pad[2] = signal * fPRFsmp[iBin2]; | |
398 | ||
793ff80c | 399 | return 1; |
e153aaf6 | 400 | |
793ff80c | 401 | } |
402 | else { | |
e153aaf6 | 403 | |
793ff80c | 404 | return 0; |
e153aaf6 | 405 | |
793ff80c | 406 | } |
407 | ||
408 | } | |
409 | ||
410 | //_____________________________________________________________________________ | |
411 | Float_t AliTRDdigitizer::TimeResponse(Float_t time) | |
412 | { | |
413 | // | |
414 | // Applies the preamp shaper time response | |
415 | // | |
416 | ||
417 | Int_t iBin = ((Int_t) ((time - fTRFlo) / fTRFwid)); | |
418 | if ((iBin >= 0) && (iBin < fTRFbin)) { | |
872a7aba | 419 | return fTRFsmp[iBin]; |
793ff80c | 420 | } |
421 | else { | |
422 | return 0.0; | |
423 | } | |
424 | ||
425 | } | |
426 | ||
f7336fa3 | 427 | //_____________________________________________________________________________ |
428 | void AliTRDdigitizer::Init() | |
429 | { | |
430 | // | |
431 | // Initializes the digitization procedure with standard values | |
432 | // | |
433 | ||
434 | // The default parameter for the digitization | |
db30bf0f | 435 | fGasGain = 2800.; |
436 | fChipGain = 6.1; | |
6244debe | 437 | fNoise = 1000.; |
438 | fADCoutRange = 1023.; // 10-bit ADC | |
a3c76cdc | 439 | fADCinRange = 1000.; // 1V input range |
6244debe | 440 | fADCthreshold = 1; |
441 | ||
442 | // For the summable digits | |
443 | fSinRange = 1000000.; | |
444 | fSoutRange = 1000000.; | |
f7336fa3 | 445 | |
db30bf0f | 446 | // The drift velocity (cm / mus) |
447 | fDriftVelocity = 1.5; | |
448 | ||
db30bf0f | 449 | // Diffusion on |
6244debe | 450 | fDiffusionOn = 1; |
db30bf0f | 451 | |
452 | // E x B effects | |
453 | fExBOn = 0; | |
f7336fa3 | 454 | |
455 | // Propability for electron attachment | |
6244debe | 456 | fElAttachOn = 0; |
457 | fElAttachProp = 0.0; | |
f7336fa3 | 458 | |
da581aea | 459 | // The pad response function |
6244debe | 460 | fPRFOn = 1; |
872a7aba | 461 | |
462 | // The time response function | |
463 | fTRFOn = 1; | |
da581aea | 464 | |
6244debe | 465 | // The pad coupling factor (same number as for the TPC) |
466 | fPadCoupling = 0.5; | |
467 | ||
468 | // The time coupling factor (same number as for the TPC) | |
469 | fTimeCoupling = 0.4; | |
470 | ||
6244debe | 471 | } |
472 | ||
473 | //_____________________________________________________________________________ | |
474 | void AliTRDdigitizer::ReInit() | |
475 | { | |
476 | // | |
872a7aba | 477 | // Reinitializes the digitization procedure after a change in the parameter |
6244debe | 478 | // |
479 | ||
872a7aba | 480 | if (!fGeo) { |
481 | printf("AliTRDdigitizer::ReInit -- "); | |
482 | printf("No geometry defined. Run InitDetector() first\n"); | |
483 | exit(1); | |
484 | } | |
485 | ||
6244debe | 486 | // Calculate the time bin width in ns |
487 | fTimeBinWidth = fGeo->GetTimeBinSize() / fDriftVelocity * 1000.0; | |
488 | ||
872a7aba | 489 | // The range and the binwidth for the sampled TRF |
490 | fTRFbin = 100; | |
db30bf0f | 491 | // Start 0.2 mus before the signal |
492 | fTRFlo = -0.2 * fDriftVelocity; | |
872a7aba | 493 | // End the maximum driftlength after the signal |
494 | fTRFhi = AliTRDgeometry::DrThick() | |
495 | + fGeo->GetTimeAfter() * fGeo->GetTimeBinSize(); | |
496 | fTRFwid = (fTRFhi - fTRFlo) / ((Float_t) fTRFbin); | |
6244debe | 497 | |
db30bf0f | 498 | // Transverse and longitudinal diffusion coefficients (Xe/CO2) |
499 | fDiffusionT = GetDiffusionT(fDriftVelocity,fField); | |
500 | fDiffusionL = GetDiffusionL(fDriftVelocity,fField); | |
501 | ||
502 | // omega * tau.= tan(Lorentz-angle) | |
503 | fOmegaTau = GetOmegaTau(fDriftVelocity,fField); | |
504 | ||
6244debe | 505 | // The Lorentz factor |
506 | if (fExBOn) { | |
507 | fLorentzFactor = 1.0 / (1.0 + fOmegaTau*fOmegaTau); | |
508 | } | |
509 | else { | |
510 | fLorentzFactor = 1.0; | |
511 | } | |
793ff80c | 512 | |
513 | } | |
514 | ||
515 | //_____________________________________________________________________________ | |
6244debe | 516 | void AliTRDdigitizer::SampleTRF() |
793ff80c | 517 | { |
518 | // | |
6244debe | 519 | // Samples the time response function |
872a7aba | 520 | // It is defined according to Vasiles simulation of the preamp shaper |
521 | // output and includes the effect of the ion tail (based on Tariqs | |
522 | // Garfield simulation) and a shaping time of 125 ns FWHM | |
793ff80c | 523 | // |
524 | ||
872a7aba | 525 | Int_t ipos1; |
526 | Int_t ipos2; | |
527 | Float_t diff; | |
528 | ||
db30bf0f | 529 | const Int_t kNpasa = 200; |
530 | Float_t time[kNpasa] = { -0.280000, -0.270000, -0.260000, -0.250000 | |
531 | , -0.240000, -0.230000, -0.220000, -0.210000 | |
532 | , -0.200000, -0.190000, -0.180000, -0.170000 | |
533 | , -0.160000, -0.150000, -0.140000, -0.130000 | |
534 | , -0.120000, -0.110000, -0.100000, -0.090000 | |
535 | , -0.080000, -0.070000, -0.060000, -0.050000 | |
536 | , -0.040000, -0.030000, -0.020000, -0.010000 | |
537 | , -0.000000, 0.010000, 0.020000, 0.030000 | |
538 | , 0.040000, 0.050000, 0.060000, 0.070000 | |
539 | , 0.080000, 0.090000, 0.100000, 0.110000 | |
540 | , 0.120000, 0.130000, 0.140000, 0.150000 | |
541 | , 0.160000, 0.170000, 0.180000, 0.190000 | |
542 | , 0.200000, 0.210000, 0.220000, 0.230000 | |
543 | , 0.240000, 0.250000, 0.260000, 0.270000 | |
544 | , 0.280000, 0.290000, 0.300000, 0.310000 | |
545 | , 0.320000, 0.330000, 0.340000, 0.350000 | |
546 | , 0.360000, 0.370000, 0.380000, 0.390000 | |
547 | , 0.400000, 0.410000, 0.420000, 0.430000 | |
548 | , 0.440000, 0.450000, 0.460000, 0.470000 | |
549 | , 0.480000, 0.490000, 0.500000, 0.510000 | |
550 | , 0.520000, 0.530000, 0.540000, 0.550000 | |
551 | , 0.560000, 0.570000, 0.580000, 0.590000 | |
552 | , 0.600000, 0.610000, 0.620000, 0.630000 | |
553 | , 0.640000, 0.650000, 0.660000, 0.670000 | |
554 | , 0.680000, 0.690000, 0.700000, 0.710000 | |
555 | , 0.720000, 0.730000, 0.740000, 0.750000 | |
556 | , 0.760000, 0.770000, 0.780000, 0.790000 | |
557 | , 0.800000, 0.810000, 0.820000, 0.830000 | |
558 | , 0.840000, 0.850000, 0.860000, 0.870000 | |
559 | , 0.880000, 0.890000, 0.900000, 0.910000 | |
560 | , 0.920000, 0.930000, 0.940000, 0.950000 | |
561 | , 0.960000, 0.970000, 0.980000, 0.990000 | |
562 | , 1.000000, 1.010000, 1.020000, 1.030000 | |
563 | , 1.040000, 1.050000, 1.060000, 1.070000 | |
564 | , 1.080000, 1.090000, 1.100000, 1.110000 | |
565 | , 1.120000, 1.130000, 1.140000, 1.150000 | |
566 | , 1.160000, 1.170000, 1.180000, 1.190000 | |
567 | , 1.200000, 1.210000, 1.220000, 1.230000 | |
568 | , 1.240000, 1.250000, 1.260000, 1.270000 | |
569 | , 1.280000, 1.290000, 1.300000, 1.310000 | |
570 | , 1.320000, 1.330000, 1.340000, 1.350000 | |
571 | , 1.360000, 1.370000, 1.380000, 1.390000 | |
572 | , 1.400000, 1.410000, 1.420000, 1.430000 | |
573 | , 1.440000, 1.450000, 1.460000, 1.470000 | |
574 | , 1.480000, 1.490000, 1.500000, 1.510000 | |
575 | , 1.520000, 1.530000, 1.540000, 1.550000 | |
576 | , 1.560000, 1.570000, 1.580000, 1.590000 | |
577 | , 1.600000, 1.610000, 1.620000, 1.630000 | |
578 | , 1.640000, 1.650000, 1.660000, 1.670000 | |
579 | , 1.680000, 1.690000, 1.700000, 1.710000 }; | |
580 | ||
581 | Float_t signal[kNpasa] = { 0.000000, 0.000000, 0.000000, 0.000000 | |
582 | , 0.000000, 0.000000, 0.000000, 0.000000 | |
583 | , 0.000000, 0.000000, 0.000000, 0.000000 | |
584 | , 0.000000, 0.000000, 0.000000, 0.000098 | |
585 | , 0.003071, 0.020056, 0.066053, 0.148346 | |
586 | , 0.263120, 0.398496, 0.540226, 0.674436 | |
587 | , 0.790977, 0.883083, 0.947744, 0.985714 | |
588 | , 0.999248, 0.992105, 0.967669, 0.930827 | |
589 | , 0.884586, 0.833083, 0.778571, 0.723684 | |
590 | , 0.669173, 0.617293, 0.567669, 0.521805 | |
591 | , 0.479699, 0.440977, 0.405639, 0.373985 | |
592 | , 0.345526, 0.320038, 0.297256, 0.276917 | |
593 | , 0.258797, 0.242632, 0.228195, 0.215301 | |
594 | , 0.203759, 0.193383, 0.184023, 0.175564 | |
595 | , 0.167895, 0.160940, 0.154549, 0.148722 | |
596 | , 0.143308, 0.138346, 0.133722, 0.129398 | |
597 | , 0.125376, 0.121617, 0.118045, 0.114699 | |
598 | , 0.111541, 0.108571, 0.105714, 0.103008 | |
599 | , 0.100414, 0.097970, 0.095602, 0.093346 | |
600 | , 0.091165, 0.089060, 0.087068, 0.085150 | |
601 | , 0.083308, 0.081541, 0.079812, 0.078158 | |
602 | , 0.076541, 0.075000, 0.073496, 0.072068 | |
603 | , 0.070677, 0.069286, 0.068008, 0.066729 | |
604 | , 0.065489, 0.064286, 0.063120, 0.061992 | |
605 | , 0.060902, 0.059850, 0.058797, 0.057820 | |
606 | , 0.056842, 0.055902, 0.054962, 0.054060 | |
607 | , 0.053158, 0.052293, 0.051466, 0.050639 | |
608 | , 0.049850, 0.049060, 0.048308, 0.047556 | |
609 | , 0.046842, 0.046128, 0.045451, 0.044774 | |
610 | , 0.044098, 0.043459, 0.042820, 0.042218 | |
611 | , 0.041617, 0.041015, 0.040451, 0.039887 | |
612 | , 0.039323, 0.038797, 0.038271, 0.037744 | |
613 | , 0.037237, 0.036744, 0.036259, 0.035786 | |
614 | , 0.035323, 0.034872, 0.034429, 0.033996 | |
615 | , 0.033575, 0.033162, 0.032756, 0.032361 | |
616 | , 0.031974, 0.031594, 0.031222, 0.030857 | |
617 | , 0.030496, 0.030143, 0.029793, 0.029451 | |
618 | , 0.029109, 0.028774, 0.028444, 0.028113 | |
619 | , 0.027793, 0.027477, 0.027165, 0.026861 | |
620 | , 0.026564, 0.026271, 0.025981, 0.025699 | |
621 | , 0.025421, 0.025147, 0.024880, 0.024613 | |
622 | , 0.024353, 0.024094, 0.023842, 0.023590 | |
623 | , 0.023346, 0.023102, 0.022865, 0.022628 | |
624 | , 0.022398, 0.022173, 0.021951, 0.021733 | |
625 | , 0.021519, 0.021308, 0.021098, 0.020891 | |
626 | , 0.020688, 0.020485, 0.020286, 0.020090 | |
627 | , 0.019895, 0.019707, 0.019519, 0.019335 | |
628 | , 0.019150, 0.018974, 0.018797, 0.018624 | |
629 | , 0.018451, 0.018282, 0.018113, 0.017947 | |
630 | , 0.017782, 0.017617, 0.017455, 0.017297 }; | |
631 | ||
632 | //for (Int_t ipasa = 0; ipasa < kNpasa; ipasa++) { | |
633 | // time[ipasa] += 0.13; | |
88fd7ccb | 634 | // time[ipasa] *= 0.5; |
db30bf0f | 635 | //} |
872a7aba | 636 | |
637 | if (fTRFsmp) delete fTRFsmp; | |
638 | fTRFsmp = new Float_t[fTRFbin]; | |
639 | ||
640 | Float_t loTRF = TMath::Max(fTRFlo / fDriftVelocity,time[0]); | |
641 | Float_t hiTRF = TMath::Min(fTRFhi / fDriftVelocity,time[kNpasa-1]); | |
793ff80c | 642 | Float_t binWidth = (hiTRF - loTRF) / ((Float_t) fTRFbin); |
872a7aba | 643 | |
644 | // Take the linear interpolation | |
793ff80c | 645 | for (Int_t iBin = 0; iBin < fTRFbin; iBin++) { |
872a7aba | 646 | |
6244debe | 647 | Float_t bin = (((Float_t) iBin) + 0.5) * binWidth + loTRF; |
872a7aba | 648 | ipos1 = ipos2 = 0; |
649 | diff = 0; | |
650 | do { | |
651 | diff = bin - time[ipos2++]; | |
652 | } while (diff > 0); | |
653 | ipos2--; | |
654 | if (ipos2 > kNpasa) ipos2 = kNpasa - 1; | |
655 | ipos1 = ipos2 - 1; | |
656 | ||
657 | fTRFsmp[iBin] = signal[ipos2] | |
658 | + diff * (signal[ipos2] - signal[ipos1]) | |
659 | / ( time[ipos2] - time[ipos1]); | |
660 | ||
793ff80c | 661 | } |
662 | ||
f7336fa3 | 663 | } |
664 | ||
e153aaf6 | 665 | //_____________________________________________________________________________ |
666 | void AliTRDdigitizer::SamplePRF() | |
667 | { | |
668 | // | |
669 | // Samples the pad response function | |
670 | // | |
671 | ||
db30bf0f | 672 | const Int_t kPRFbin = 61; |
673 | Float_t prf[kPRFbin] = { 0.002340, 0.003380, 0.004900, 0.007080, 0.010220 | |
674 | , 0.014740, 0.021160, 0.030230, 0.042800, 0.059830 | |
675 | , 0.082030, 0.109700, 0.142550, 0.179840, 0.220610 | |
676 | , 0.263980, 0.309180, 0.355610, 0.402790, 0.450350 | |
677 | , 0.497930, 0.545190, 0.591740, 0.637100, 0.680610 | |
678 | , 0.721430, 0.758400, 0.790090, 0.814720, 0.830480 | |
679 | , 0.835930, 0.830480, 0.814710, 0.790070, 0.758390 | |
680 | , 0.721410, 0.680590, 0.637080, 0.591730, 0.545180 | |
681 | , 0.497920, 0.450340, 0.402790, 0.355610, 0.309190 | |
682 | , 0.263990, 0.220630, 0.179850, 0.142570, 0.109720 | |
683 | , 0.082040, 0.059830, 0.042820, 0.030230, 0.021170 | |
684 | , 0.014740, 0.010230, 0.007080, 0.004900, 0.003380 | |
685 | , 0.002340 }; | |
686 | ||
687 | fPRFlo = -1.5; | |
688 | fPRFhi = 1.5; | |
689 | fPRFbin = kPRFbin; | |
690 | fPRFwid = (fPRFhi - fPRFlo) / ((Float_t) fPRFbin); | |
691 | fPRFpad = ((Int_t) (1.0 / fPRFwid)); | |
692 | ||
e153aaf6 | 693 | if (fPRFsmp) delete fPRFsmp; |
694 | fPRFsmp = new Float_t[fPRFbin]; | |
695 | for (Int_t iBin = 0; iBin < fPRFbin; iBin++) { | |
db30bf0f | 696 | fPRFsmp[iBin] = prf[iBin]; |
e153aaf6 | 697 | } |
698 | ||
699 | } | |
700 | ||
f7336fa3 | 701 | //_____________________________________________________________________________ |
702 | Bool_t AliTRDdigitizer::Open(const Char_t *name, Int_t nEvent) | |
703 | { | |
704 | // | |
705 | // Opens a ROOT-file with TRD-hits and reads in the hit-tree | |
706 | // | |
707 | ||
708 | // Connect the AliRoot file containing Geometry, Kine, and Hits | |
709 | fInputFile = (TFile*) gROOT->GetListOfFiles()->FindObject(name); | |
710 | if (!fInputFile) { | |
711 | printf("AliTRDdigitizer::Open -- "); | |
712 | printf("Open the ALIROOT-file %s.\n",name); | |
713 | fInputFile = new TFile(name,"UPDATE"); | |
714 | } | |
715 | else { | |
716 | printf("AliTRDdigitizer::Open -- "); | |
717 | printf("%s is already open.\n",name); | |
718 | } | |
719 | ||
da581aea | 720 | gAlice = (AliRun*) fInputFile->Get("gAlice"); |
721 | if (gAlice) { | |
722 | printf("AliTRDdigitizer::Open -- "); | |
723 | printf("AliRun object found on file.\n"); | |
724 | } | |
725 | else { | |
726 | printf("AliTRDdigitizer::Open -- "); | |
727 | printf("Could not find AliRun object.\n"); | |
728 | return kFALSE; | |
729 | } | |
f7336fa3 | 730 | |
731 | fEvent = nEvent; | |
732 | ||
733 | // Import the Trees for the event nEvent in the file | |
734 | Int_t nparticles = gAlice->GetEvent(fEvent); | |
735 | if (nparticles <= 0) { | |
736 | printf("AliTRDdigitizer::Open -- "); | |
737 | printf("No entries in the trees for event %d.\n",fEvent); | |
738 | return kFALSE; | |
739 | } | |
740 | ||
793ff80c | 741 | return InitDetector(); |
742 | ||
743 | } | |
744 | ||
745 | //_____________________________________________________________________________ | |
746 | Bool_t AliTRDdigitizer::InitDetector() | |
747 | { | |
748 | // | |
749 | // Sets the pointer to the TRD detector and the geometry | |
750 | // | |
751 | ||
dd9a6ee3 | 752 | // Get the pointer to the detector class and check for version 1 |
753 | fTRD = (AliTRD*) gAlice->GetDetector("TRD"); | |
754 | if (fTRD->IsVersion() != 1) { | |
6244debe | 755 | printf("AliTRDdigitizer::InitDetector -- "); |
dd9a6ee3 | 756 | printf("TRD must be version 1 (slow simulator).\n"); |
757 | exit(1); | |
758 | } | |
759 | ||
760 | // Get the geometry | |
761 | fGeo = fTRD->GetGeometry(); | |
6244debe | 762 | printf("AliTRDdigitizer::InitDetector -- "); |
dd9a6ee3 | 763 | printf("Geometry version %d\n",fGeo->IsVersion()); |
764 | ||
88fd7ccb | 765 | // The magnetic field strength in Tesla |
766 | fField = 0.2 * gAlice->Field()->Factor(); | |
767 | ||
872a7aba | 768 | ReInit(); |
769 | ||
f7336fa3 | 770 | return kTRUE; |
771 | ||
772 | } | |
773 | ||
6244debe | 774 | //_____________________________________________________________________________ |
775 | Bool_t AliTRDdigitizer::SumSDigits() | |
776 | { | |
777 | // | |
778 | // Sums up the summable digits and creates final digits | |
779 | // Not yet implemented | |
780 | // | |
781 | ||
782 | return kFALSE; | |
783 | ||
784 | } | |
785 | ||
f7336fa3 | 786 | //_____________________________________________________________________________ |
787 | Bool_t AliTRDdigitizer::MakeDigits() | |
788 | { | |
789 | // | |
872a7aba | 790 | // Creates digits. |
f7336fa3 | 791 | // |
792 | ||
f7336fa3 | 793 | /////////////////////////////////////////////////////////////// |
794 | // Parameter | |
795 | /////////////////////////////////////////////////////////////// | |
796 | ||
797 | // Converts number of electrons to fC | |
872a7aba | 798 | const Double_t kEl2fC = 1.602E-19 * 1.0E15; |
f7336fa3 | 799 | |
800 | /////////////////////////////////////////////////////////////// | |
801 | ||
793ff80c | 802 | // Number of pads included in the pad response |
803 | const Int_t kNpad = 3; | |
804 | ||
805 | // Number of track dictionary arrays | |
dd56b762 | 806 | const Int_t kNDict = AliTRDdigitsManager::kNDict; |
793ff80c | 807 | |
872a7aba | 808 | // Half the width of the amplification region |
809 | const Float_t kAmWidth = AliTRDgeometry::AmThick() / 2.; | |
810 | ||
c3a4830f | 811 | Int_t iRow, iCol, iTime, iPad; |
71d9fa7b | 812 | Int_t iDict = 0; |
793ff80c | 813 | Int_t nBytes = 0; |
f7336fa3 | 814 | |
815 | Int_t totalSizeDigits = 0; | |
816 | Int_t totalSizeDict0 = 0; | |
817 | Int_t totalSizeDict1 = 0; | |
818 | Int_t totalSizeDict2 = 0; | |
819 | ||
872a7aba | 820 | Int_t timeTRDbeg = 0; |
821 | Int_t timeTRDend = 1; | |
822 | ||
823 | Float_t pos[3]; | |
824 | Float_t rot[3]; | |
825 | Float_t xyz[3]; | |
826 | Float_t padSignal[kNpad]; | |
827 | Float_t signalOld[kNpad]; | |
828 | ||
793ff80c | 829 | AliTRDdataArrayF *signals = 0; |
830 | AliTRDdataArrayI *digits = 0; | |
8230f242 | 831 | AliTRDdataArrayI *dictionary[kNDict]; |
da581aea | 832 | |
793ff80c | 833 | // Create a digits manager |
834 | fDigits = new AliTRDdigitsManager(); | |
835 | ||
836 | // Create a container for the amplitudes | |
837 | AliTRDsegmentArray *signalsArray | |
838 | = new AliTRDsegmentArray("AliTRDdataArrayF",AliTRDgeometry::Ndet()); | |
839 | ||
872a7aba | 840 | if (fTRFOn) { |
841 | timeTRDbeg = ((Int_t) (-fTRFlo / fGeo->GetTimeBinSize())) - 1; | |
842 | timeTRDend = ((Int_t) ( fTRFhi / fGeo->GetTimeBinSize())) - 1; | |
da581aea | 843 | printf("AliTRDdigitizer::MakeDigits -- "); |
872a7aba | 844 | printf("Sample the TRF between -%d and %d\n",timeTRDbeg,timeTRDend); |
da581aea | 845 | } |
846 | ||
872a7aba | 847 | Float_t elAttachProp = fElAttachProp / 100.; |
f7336fa3 | 848 | |
e153aaf6 | 849 | // Create the sampled PRF |
850 | SamplePRF(); | |
851 | ||
6244debe | 852 | // Create the sampled TRF |
853 | SampleTRF(); | |
793ff80c | 854 | |
872a7aba | 855 | if (!fGeo) { |
856 | printf("AliTRDdigitizer::MakeDigits -- "); | |
857 | printf("No geometry defined\n"); | |
858 | return kFALSE; | |
859 | } | |
860 | ||
861 | printf("AliTRDdigitizer::MakeDigits -- "); | |
862 | printf("Start creating digits.\n"); | |
863 | if (fVerbose > 0) this->Dump(); | |
864 | ||
793ff80c | 865 | // Get the pointer to the hit tree |
866 | TTree *HitTree = gAlice->TreeH(); | |
867 | ||
868 | // Get the number of entries in the hit tree | |
869 | // (Number of primary particles creating a hit somewhere) | |
870 | Int_t nTrack = (Int_t) HitTree->GetEntries(); | |
871 | if (fVerbose > 0) { | |
872 | printf("AliTRDdigitizer::MakeDigits -- "); | |
873 | printf("Found %d primary particles\n",nTrack); | |
874 | } | |
875 | ||
876 | Int_t detectorOld = -1; | |
877 | Int_t countHits = 0; | |
878 | ||
879 | // Loop through all entries in the tree | |
880 | for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) { | |
881 | ||
882 | gAlice->ResetHits(); | |
883 | nBytes += HitTree->GetEvent(iTrack); | |
884 | ||
885 | // Get the number of hits in the TRD created by this particle | |
886 | Int_t nHit = fTRD->Hits()->GetEntriesFast(); | |
887 | if (fVerbose > 0) { | |
888 | printf("AliTRDdigitizer::MakeDigits -- "); | |
889 | printf("Found %d hits for primary particle %d\n",nHit,iTrack); | |
890 | } | |
891 | ||
892 | // Loop through the TRD hits | |
893 | for (Int_t iHit = 0; iHit < nHit; iHit++) { | |
894 | ||
895 | countHits++; | |
896 | ||
897 | AliTRDhit *hit = (AliTRDhit *) fTRD->Hits()->UncheckedAt(iHit); | |
793ff80c | 898 | pos[0] = hit->X(); |
899 | pos[1] = hit->Y(); | |
900 | pos[2] = hit->Z(); | |
901 | Float_t q = hit->GetCharge(); | |
902 | Int_t track = hit->Track(); | |
903 | Int_t detector = hit->GetDetector(); | |
904 | Int_t plane = fGeo->GetPlane(detector); | |
905 | Int_t sector = fGeo->GetSector(detector); | |
906 | Int_t chamber = fGeo->GetChamber(detector); | |
907 | ||
908 | if (!(CheckDetector(plane,chamber,sector))) continue; | |
909 | ||
910 | Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector); | |
911 | Int_t nColMax = fGeo->GetColMax(plane); | |
912 | Int_t nTimeMax = fGeo->GetTimeMax(); | |
872a7aba | 913 | Int_t nTimeBefore = fGeo->GetTimeBefore(); |
914 | Int_t nTimeAfter = fGeo->GetTimeAfter(); | |
915 | Int_t nTimeTotal = fGeo->GetTimeTotal(); | |
793ff80c | 916 | Float_t row0 = fGeo->GetRow0(plane,chamber,sector); |
917 | Float_t col0 = fGeo->GetCol0(plane); | |
918 | Float_t time0 = fGeo->GetTime0(plane); | |
71d9fa7b | 919 | Float_t rowPadSize = fGeo->GetRowPadSize(plane,chamber,sector); |
920 | Float_t colPadSize = fGeo->GetColPadSize(plane); | |
793ff80c | 921 | Float_t timeBinSize = fGeo->GetTimeBinSize(); |
872a7aba | 922 | Float_t divideRow = 1.0 / rowPadSize; |
923 | Float_t divideCol = 1.0 / colPadSize; | |
924 | Float_t divideTime = 1.0 / timeBinSize; | |
793ff80c | 925 | |
926 | if (fVerbose > 1) { | |
927 | printf("Analyze hit no. %d ",iHit); | |
928 | printf("-----------------------------------------------------------\n"); | |
929 | hit->Dump(); | |
930 | printf("plane = %d, sector = %d, chamber = %d\n" | |
931 | ,plane,sector,chamber); | |
932 | printf("nRowMax = %d, nColMax = %d, nTimeMax = %d\n" | |
933 | ,nRowMax,nColMax,nTimeMax); | |
872a7aba | 934 | printf("nTimeBefore = %d, nTimeAfter = %d, nTimeTotal = %d\n" |
935 | ,nTimeBefore,nTimeAfter,nTimeTotal); | |
793ff80c | 936 | printf("row0 = %f, col0 = %f, time0 = %f\n" |
937 | ,row0,col0,time0); | |
c1e4b257 | 938 | printf("rowPadSize = %f, colPadSize = %f, timeBinSize = %f\n" |
939 | ,rowPadSize,colPadSize,timeBinSize); | |
793ff80c | 940 | } |
941 | ||
872a7aba | 942 | // Don't analyze test hits |
943 | if (hit->FromTest()) continue; | |
dd56b762 | 944 | |
793ff80c | 945 | if (detector != detectorOld) { |
e153aaf6 | 946 | |
793ff80c | 947 | if (fVerbose > 1) { |
948 | printf("AliTRDdigitizer::MakeDigits -- "); | |
949 | printf("Get new container. New det = %d, Old det = %d\n" | |
950 | ,detector,detectorOld); | |
951 | } | |
952 | // Compress the old one if enabled | |
953 | if ((fCompress) && (detectorOld > -1)) { | |
954 | if (fVerbose > 1) { | |
955 | printf("AliTRDdigitizer::MakeDigits -- "); | |
e153aaf6 | 956 | printf("Compress the old container ..."); |
dd9a6ee3 | 957 | } |
793ff80c | 958 | signals->Compress(1,0); |
959 | for (iDict = 0; iDict < kNDict; iDict++) { | |
960 | dictionary[iDict]->Compress(1,0); | |
dd9a6ee3 | 961 | } |
793ff80c | 962 | if (fVerbose > 1) printf("done\n"); |
9d0b222b | 963 | } |
793ff80c | 964 | // Get the new container |
965 | signals = (AliTRDdataArrayF *) signalsArray->At(detector); | |
966 | if (signals->GetNtime() == 0) { | |
967 | // Allocate a new one if not yet existing | |
968 | if (fVerbose > 1) { | |
969 | printf("AliTRDdigitizer::MakeDigits -- "); | |
970 | printf("Allocate a new container ... "); | |
971 | } | |
872a7aba | 972 | signals->Allocate(nRowMax,nColMax,nTimeTotal); |
793ff80c | 973 | } |
974 | else { | |
975 | // Expand an existing one | |
c1e4b257 | 976 | if (fCompress) { |
977 | if (fVerbose > 1) { | |
978 | printf("AliTRDdigitizer::MakeDigits -- "); | |
979 | printf("Expand an existing container ... "); | |
980 | } | |
981 | signals->Expand(); | |
793ff80c | 982 | } |
793ff80c | 983 | } |
984 | // The same for the dictionary | |
985 | for (iDict = 0; iDict < kNDict; iDict++) { | |
986 | dictionary[iDict] = fDigits->GetDictionary(detector,iDict); | |
987 | if (dictionary[iDict]->GetNtime() == 0) { | |
872a7aba | 988 | dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal); |
793ff80c | 989 | } |
990 | else { | |
991 | if (fCompress) dictionary[iDict]->Expand(); | |
992 | } | |
993 | } | |
994 | if (fVerbose > 1) printf("done\n"); | |
995 | detectorOld = detector; | |
996 | } | |
9d0b222b | 997 | |
793ff80c | 998 | // Rotate the sectors on top of each other |
793ff80c | 999 | fGeo->Rotate(detector,pos,rot); |
1000 | ||
872a7aba | 1001 | // The driftlength. It is negative if the hit is in the |
1002 | // amplification region. | |
793ff80c | 1003 | Float_t driftlength = time0 - rot[0]; |
793ff80c | 1004 | |
872a7aba | 1005 | // Take also the drift in the amplification region into account |
1006 | // The drift length is at the moment still the same, regardless of | |
1007 | // the position relativ to the wire. This non-isochronity needs still | |
1008 | // to be implemented. | |
1009 | Float_t driftlengthL = TMath::Abs(driftlength + kAmWidth); | |
1010 | if (fExBOn) driftlengthL /= TMath::Sqrt(fLorentzFactor); | |
793ff80c | 1011 | |
1012 | // Loop over all electrons of this hit | |
1013 | // TR photons produce hits with negative charge | |
1014 | Int_t nEl = ((Int_t) TMath::Abs(q)); | |
1015 | for (Int_t iEl = 0; iEl < nEl; iEl++) { | |
1016 | ||
793ff80c | 1017 | xyz[0] = rot[0]; |
1018 | xyz[1] = rot[1]; | |
1019 | xyz[2] = rot[2]; | |
1020 | ||
1021 | // Electron attachment | |
1022 | if (fElAttachOn) { | |
872a7aba | 1023 | if (gRandom->Rndm() < (driftlengthL * elAttachProp)) |
793ff80c | 1024 | continue; |
1025 | } | |
1026 | ||
1027 | // Apply the diffusion smearing | |
1028 | if (fDiffusionOn) { | |
1029 | if (!(Diffusion(driftlengthL,xyz))) continue; | |
da581aea | 1030 | } |
f7336fa3 | 1031 | |
872a7aba | 1032 | // Apply E x B effects (depends on drift direction) |
793ff80c | 1033 | if (fExBOn) { |
872a7aba | 1034 | if (!(ExB(driftlength+kAmWidth,xyz))) continue; |
793ff80c | 1035 | } |
f7336fa3 | 1036 | |
872a7aba | 1037 | // The electron position after diffusion and ExB in pad coordinates |
793ff80c | 1038 | // The pad row (z-direction) |
872a7aba | 1039 | Int_t rowE = ((Int_t) ((xyz[2] - row0) * divideRow)); |
1040 | if ((rowE < 0) || (rowE >= nRowMax)) continue; | |
793ff80c | 1041 | |
872a7aba | 1042 | // The pad column (rphi-direction) |
1043 | Int_t colE = ((Int_t) ((xyz[1] - col0) * divideCol)); | |
1044 | if ((colE < 0) || (colE >= nColMax)) continue; | |
1045 | ||
1046 | // The time bin (negative for hits in the amplification region) | |
1047 | // In the amplification region the electrons drift from both sides | |
1048 | // to the middle (anode wire plane) | |
1049 | Float_t timeDist = time0 - xyz[0]; | |
1050 | Float_t timeOffset = 0; | |
1051 | Int_t timeE = 0; | |
1052 | if (timeDist > 0) { | |
1053 | // The time bin | |
1054 | timeE = ((Int_t) (timeDist * divideTime)); | |
1055 | // The distance of the position to the middle of the timebin | |
1056 | timeOffset = ((((Float_t) timeE) + 0.5) * timeBinSize) - timeDist; | |
1057 | } | |
1058 | else { | |
1059 | // Difference between half of the amplification gap width and | |
1060 | // the distance to the anode wire | |
1061 | Float_t anodeDist = kAmWidth - TMath::Abs(timeDist + kAmWidth); | |
1062 | // The time bin | |
1063 | timeE = -1 * (((Int_t ) (anodeDist * divideTime)) + 1); | |
1064 | // The distance of the position to the middle of the timebin | |
1065 | timeOffset = ((((Float_t) timeE) + 0.5) * timeBinSize) + anodeDist; | |
1066 | } | |
1067 | ||
793ff80c | 1068 | // Apply the gas gain including fluctuations |
1069 | Float_t ggRndm = 0.0; | |
1070 | do { | |
1071 | ggRndm = gRandom->Rndm(); | |
1072 | } while (ggRndm <= 0); | |
1073 | Int_t signal = (Int_t) (-fGasGain * TMath::Log(ggRndm)); | |
1074 | ||
793ff80c | 1075 | // Apply the pad response |
793ff80c | 1076 | if (fPRFOn) { |
1077 | // The distance of the electron to the center of the pad | |
1078 | // in units of pad width | |
1079 | Float_t dist = (xyz[1] - col0 - (colE + 0.5) * colPadSize) | |
872a7aba | 1080 | * divideCol; |
793ff80c | 1081 | if (!(PadResponse(signal,dist,padSignal))) continue; |
1082 | } | |
1083 | else { | |
1084 | padSignal[0] = 0.0; | |
1085 | padSignal[1] = signal; | |
1086 | padSignal[2] = 0.0; | |
1087 | } | |
f7336fa3 | 1088 | |
872a7aba | 1089 | // Sample the time response inside the drift region |
1090 | // + additional time bins before and after. | |
1091 | // The sampling is done always in the middle of the time bin | |
1092 | for (Int_t iTimeBin = TMath::Max(timeE-timeTRDbeg, -nTimeBefore) | |
1093 | ;iTimeBin < TMath::Min(timeE+timeTRDend,nTimeMax+nTimeAfter ) | |
6244debe | 1094 | ;iTimeBin++) { |
793ff80c | 1095 | |
1096 | // Apply the time response | |
1097 | Float_t timeResponse = 1.0; | |
1098 | if (fTRFOn) { | |
1099 | Float_t time = (iTimeBin - timeE) * timeBinSize + timeOffset; | |
1100 | timeResponse = TimeResponse(time); | |
1101 | } | |
f7336fa3 | 1102 | |
872a7aba | 1103 | signalOld[0] = 0.0; |
1104 | signalOld[1] = 0.0; | |
1105 | signalOld[2] = 0.0; | |
1106 | ||
c3a4830f | 1107 | for (iPad = 0; iPad < kNpad; iPad++) { |
872a7aba | 1108 | |
793ff80c | 1109 | Int_t colPos = colE + iPad - 1; |
1110 | if (colPos < 0) continue; | |
1111 | if (colPos >= nColMax) break; | |
872a7aba | 1112 | |
1113 | // Add the signals | |
1114 | // Note: The time bin number is shifted by nTimeBefore to avoid negative | |
db30bf0f | 1115 | // time bins. This has to be subtracted later. |
872a7aba | 1116 | Int_t iCurrentTimeBin = iTimeBin + nTimeBefore; |
1117 | signalOld[iPad] = signals->GetDataUnchecked(rowE,colPos,iCurrentTimeBin); | |
793ff80c | 1118 | signalOld[iPad] += padSignal[iPad] * timeResponse; |
872a7aba | 1119 | signals->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,signalOld[iPad]); |
f7336fa3 | 1120 | |
872a7aba | 1121 | // Store the track index in the dictionary |
1122 | // Note: We store index+1 in order to allow the array to be compressed | |
1123 | if (signalOld[iPad] > 0) { | |
71d9fa7b | 1124 | for (iDict = 0; iDict < kNDict; iDict++) { |
872a7aba | 1125 | Int_t oldTrack = dictionary[iDict]->GetDataUnchecked(rowE |
1126 | ,colPos | |
1127 | ,iCurrentTimeBin); | |
71d9fa7b | 1128 | if (oldTrack == track+1) break; |
71d9fa7b | 1129 | if (oldTrack == 0) { |
872a7aba | 1130 | dictionary[iDict]->SetDataUnchecked(rowE,colPos,iCurrentTimeBin,track+1); |
71d9fa7b | 1131 | break; |
1132 | } | |
1133 | } | |
793ff80c | 1134 | } |
872a7aba | 1135 | |
1136 | } | |
f7336fa3 | 1137 | |
f7336fa3 | 1138 | } |
1139 | ||
793ff80c | 1140 | } |
f7336fa3 | 1141 | |
793ff80c | 1142 | } |
f7336fa3 | 1143 | |
793ff80c | 1144 | } // All hits finished |
f7336fa3 | 1145 | |
793ff80c | 1146 | printf("AliTRDdigitizer::MakeDigits -- "); |
1147 | printf("Finished analyzing %d hits\n",countHits); | |
1148 | ||
6244debe | 1149 | // The total conversion factor |
1150 | Float_t convert = kEl2fC * fPadCoupling * fTimeCoupling * fChipGain; | |
1151 | ||
793ff80c | 1152 | // Loop through all chambers to finalize the digits |
1153 | for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) { | |
1154 | ||
872a7aba | 1155 | Int_t plane = fGeo->GetPlane(iDet); |
1156 | Int_t sector = fGeo->GetSector(iDet); | |
1157 | Int_t chamber = fGeo->GetChamber(iDet); | |
1158 | Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector); | |
1159 | Int_t nColMax = fGeo->GetColMax(plane); | |
1160 | Int_t nTimeMax = fGeo->GetTimeMax(); | |
1161 | Int_t nTimeTotal = fGeo->GetTimeTotal(); | |
793ff80c | 1162 | |
793ff80c | 1163 | if (fVerbose > 0) { |
1164 | printf("AliTRDdigitizer::MakeDigits -- "); | |
1165 | printf("Digitization for chamber %d\n",iDet); | |
1166 | } | |
da581aea | 1167 | |
793ff80c | 1168 | // Add a container for the digits of this detector |
1169 | digits = fDigits->GetDigits(iDet); | |
1170 | // Allocate memory space for the digits buffer | |
872a7aba | 1171 | digits->Allocate(nRowMax,nColMax,nTimeTotal); |
da581aea | 1172 | |
793ff80c | 1173 | // Get the signal container |
1174 | signals = (AliTRDdataArrayF *) signalsArray->At(iDet); | |
1175 | if (signals->GetNtime() == 0) { | |
1176 | // Create missing containers | |
872a7aba | 1177 | signals->Allocate(nRowMax,nColMax,nTimeTotal); |
793ff80c | 1178 | } |
1179 | else { | |
1180 | // Expand the container if neccessary | |
1181 | if (fCompress) signals->Expand(); | |
1182 | } | |
1183 | // Create the missing dictionary containers | |
1184 | for (iDict = 0; iDict < kNDict; iDict++) { | |
1185 | dictionary[iDict] = fDigits->GetDictionary(iDet,iDict); | |
1186 | if (dictionary[iDict]->GetNtime() == 0) { | |
872a7aba | 1187 | dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeTotal); |
793ff80c | 1188 | } |
1189 | } | |
f7336fa3 | 1190 | |
793ff80c | 1191 | Int_t nDigits = 0; |
1192 | ||
6244debe | 1193 | // Don't create noise in detectors that are switched off |
1194 | if (CheckDetector(plane,chamber,sector)) { | |
1195 | ||
1196 | // Create the digits for this chamber | |
872a7aba | 1197 | for (iRow = 0; iRow < nRowMax; iRow++ ) { |
1198 | for (iCol = 0; iCol < nColMax; iCol++ ) { | |
1199 | for (iTime = 0; iTime < nTimeTotal; iTime++) { | |
6244debe | 1200 | |
1201 | // Create summable digits | |
1202 | if (fSDigits) { | |
1203 | ||
872a7aba | 1204 | Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime); |
6244debe | 1205 | Int_t adc = 0; |
1206 | if (signalAmp >= fSinRange) { | |
1207 | adc = ((Int_t) fSoutRange); | |
1208 | } | |
1209 | else { | |
1210 | adc = ((Int_t) (signalAmp * (fSoutRange / fSinRange))); | |
1211 | } | |
1212 | nDigits++; | |
872a7aba | 1213 | digits->SetDataUnchecked(iRow,iCol,iTime,adc); |
f7336fa3 | 1214 | |
c1e4b257 | 1215 | } |
6244debe | 1216 | // Create normal digits |
1217 | else { | |
1218 | ||
872a7aba | 1219 | Float_t signalAmp = signals->GetDataUnchecked(iRow,iCol,iTime); |
6244debe | 1220 | |
1221 | // Add the noise | |
1222 | signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,fNoise),0.0); | |
1223 | // Convert to mV | |
1224 | signalAmp *= convert; | |
1225 | // Convert to ADC counts. Set the overflow-bit fADCoutRange if the | |
1226 | // signal is larger than fADCinRange | |
1227 | Int_t adc = 0; | |
1228 | if (signalAmp >= fADCinRange) { | |
1229 | adc = ((Int_t) fADCoutRange); | |
1230 | } | |
1231 | else { | |
1232 | adc = ((Int_t) (signalAmp * (fADCoutRange / fADCinRange))); | |
1233 | } | |
1234 | ||
1235 | // Store the amplitude of the digit if above threshold | |
1236 | if (adc > fADCthreshold) { | |
1237 | if (fVerbose > 2) { | |
1238 | printf(" iRow = %d, iCol = %d, iTime = %d\n" | |
1239 | ,iRow,iCol,iTime); | |
1240 | printf(" signal = %f, adc = %d\n",signalAmp,adc); | |
1241 | } | |
1242 | nDigits++; | |
872a7aba | 1243 | digits->SetDataUnchecked(iRow,iCol,iTime,adc); |
6244debe | 1244 | } |
f7336fa3 | 1245 | |
6244debe | 1246 | } |
1247 | ||
1248 | } | |
1249 | } | |
793ff80c | 1250 | } |
6244debe | 1251 | |
793ff80c | 1252 | } |
1253 | ||
1254 | // Compress the arrays | |
1255 | digits->Compress(1,0); | |
1256 | for (iDict = 0; iDict < kNDict; iDict++) { | |
1257 | dictionary[iDict]->Compress(1,0); | |
1258 | } | |
f7336fa3 | 1259 | |
793ff80c | 1260 | totalSizeDigits += digits->GetSize(); |
1261 | totalSizeDict0 += dictionary[0]->GetSize(); | |
1262 | totalSizeDict1 += dictionary[1]->GetSize(); | |
1263 | totalSizeDict2 += dictionary[2]->GetSize(); | |
f7336fa3 | 1264 | |
c1e4b257 | 1265 | Float_t nPixel = nRowMax * nColMax * nTimeMax; |
793ff80c | 1266 | printf("AliTRDdigitizer::MakeDigits -- "); |
c1e4b257 | 1267 | printf("Found %d digits in detector %d (%3.0f).\n" |
1268 | ,nDigits,iDet | |
1269 | ,100.0 * ((Float_t) nDigits) / nPixel); | |
da581aea | 1270 | |
793ff80c | 1271 | if (fCompress) signals->Compress(1,0); |
f7336fa3 | 1272 | |
f7336fa3 | 1273 | } |
1274 | ||
da581aea | 1275 | printf("AliTRDdigitizer::MakeDigits -- "); |
8230f242 | 1276 | printf("Total number of analyzed hits = %d\n",countHits); |
da581aea | 1277 | |
f7336fa3 | 1278 | printf("AliTRDdigitizer::MakeDigits -- "); |
1279 | printf("Total digits data size = %d, %d, %d, %d\n",totalSizeDigits | |
1280 | ,totalSizeDict0 | |
1281 | ,totalSizeDict1 | |
1282 | ,totalSizeDict2); | |
1283 | ||
1284 | return kTRUE; | |
1285 | ||
1286 | } | |
1287 | ||
16bf9884 | 1288 | //_____________________________________________________________________________ |
1289 | Bool_t AliTRDdigitizer::Merge(TTree *trees, Int_t *mask, Int_t nin, Int_t event) | |
1290 | { | |
1291 | // | |
1292 | // Merges the summable digits of different events | |
1293 | // | |
1294 | ||
1295 | return kTRUE; | |
1296 | ||
1297 | } | |
1298 | ||
793ff80c | 1299 | //_____________________________________________________________________________ |
1300 | Bool_t AliTRDdigitizer::CheckDetector(Int_t plane, Int_t chamber, Int_t sector) | |
1301 | { | |
1302 | // | |
1303 | // Checks whether a detector is enabled | |
1304 | // | |
1305 | ||
1306 | if ((fTRD->GetSensChamber() >= 0) && | |
1307 | (fTRD->GetSensChamber() != chamber)) return kFALSE; | |
1308 | if ((fTRD->GetSensPlane() >= 0) && | |
c1e4b257 | 1309 | (fTRD->GetSensPlane() != plane)) return kFALSE; |
793ff80c | 1310 | if ( fTRD->GetSensSector() >= 0) { |
1311 | Int_t sens1 = fTRD->GetSensSector(); | |
1312 | Int_t sens2 = sens1 + fTRD->GetSensSectorRange(); | |
1313 | sens2 -= ((Int_t) (sens2 / AliTRDgeometry::Nsect())) | |
1314 | * AliTRDgeometry::Nsect(); | |
1315 | if (sens1 < sens2) { | |
1316 | if ((sector < sens1) || (sector >= sens2)) return kFALSE; | |
1317 | } | |
1318 | else { | |
1319 | if ((sector < sens1) && (sector >= sens2)) return kFALSE; | |
1320 | } | |
1321 | } | |
1322 | ||
1323 | return kTRUE; | |
1324 | ||
1325 | } | |
1326 | ||
f7336fa3 | 1327 | //_____________________________________________________________________________ |
1328 | Bool_t AliTRDdigitizer::WriteDigits() | |
1329 | { | |
1330 | // | |
1331 | // Writes out the TRD-digits and the dictionaries | |
1332 | // | |
1333 | ||
1334 | // Create the branches | |
1335 | if (!(gAlice->TreeD()->GetBranch("TRDdigits"))) { | |
6244debe | 1336 | return kFALSE; |
f7336fa3 | 1337 | } |
1338 | ||
da581aea | 1339 | // Store the digits and the dictionary in the tree |
1340 | fDigits->WriteDigits(); | |
f7336fa3 | 1341 | |
1342 | // Write the new tree into the input file (use overwrite option) | |
71d9fa7b | 1343 | Char_t treeName[15]; |
f7336fa3 | 1344 | sprintf(treeName,"TreeD%d",fEvent); |
1345 | printf("AliTRDdigitizer::WriteDigits -- "); | |
1346 | printf("Write the digits tree %s for event %d.\n" | |
1347 | ,treeName,fEvent); | |
2ab0c725 | 1348 | gAlice->TreeD()->Write(treeName,TObject::kOverwrite); |
f7336fa3 | 1349 | |
1350 | return kTRUE; | |
1351 | ||
1352 | } | |
793ff80c | 1353 | |
1354 | //_____________________________________________________________________________ | |
db30bf0f | 1355 | Float_t AliTRDdigitizer::GetDiffusionL(Float_t vd, Float_t b) |
793ff80c | 1356 | { |
1357 | // | |
db30bf0f | 1358 | // Returns the longitudinal diffusion coefficient for a given drift |
1359 | // velocity <vd> and a B-field <b> for Xe/CO2 (15%). | |
1360 | // The values are according to a GARFIELD simulation. | |
793ff80c | 1361 | // |
1362 | ||
db30bf0f | 1363 | const Int_t kNb = 5; |
1364 | Float_t p0[kNb] = { 0.007440, 0.007493, 0.007513, 0.007672, 0.007831 }; | |
1365 | Float_t p1[kNb] = { 0.019252, 0.018912, 0.018636, 0.018012, 0.017343 }; | |
1366 | Float_t p2[kNb] = { -0.005042, -0.004926, -0.004867, -0.004650, -0.004424 }; | |
1367 | Float_t p3[kNb] = { 0.000195, 0.000189, 0.000195, 0.000182, 0.000169 }; | |
1368 | ||
1369 | Int_t ib = ((Int_t) (10 * (b - 0.15))); | |
1370 | ib = TMath::Max( 0,ib); | |
1371 | ib = TMath::Min(kNb,ib); | |
1372 | ||
1373 | Float_t diff = p0[ib] | |
1374 | + p1[ib] * vd | |
1375 | + p2[ib] * vd*vd | |
1376 | + p3[ib] * vd*vd*vd; | |
1377 | ||
1378 | return diff; | |
1379 | ||
1380 | } | |
1381 | ||
1382 | //_____________________________________________________________________________ | |
1383 | Float_t AliTRDdigitizer::GetDiffusionT(Float_t vd, Float_t b) | |
1384 | { | |
1385 | // | |
1386 | // Returns the transverse diffusion coefficient for a given drift | |
1387 | // velocity <vd> and a B-field <b> for Xe/CO2 (15%). | |
1388 | // The values are according to a GARFIELD simulation. | |
1389 | // | |
1390 | ||
1391 | const Int_t kNb = 5; | |
1392 | Float_t p0[kNb] = { 0.009550, 0.009599, 0.009674, 0.009757, 0.009850 }; | |
1393 | Float_t p1[kNb] = { 0.006667, 0.006539, 0.006359, 0.006153, 0.005925 }; | |
1394 | Float_t p2[kNb] = { -0.000853, -0.000798, -0.000721, -0.000635, -0.000541 }; | |
1395 | Float_t p3[kNb] = { 0.000131, 0.000122, 0.000111, 0.000098, 0.000085 }; | |
1396 | ||
1397 | Int_t ib = ((Int_t) (10 * (b - 0.15))); | |
1398 | ib = TMath::Max( 0,ib); | |
1399 | ib = TMath::Min(kNb,ib); | |
1400 | ||
1401 | Float_t diff = p0[ib] | |
1402 | + p1[ib] * vd | |
1403 | + p2[ib] * vd*vd | |
1404 | + p3[ib] * vd*vd*vd; | |
1405 | ||
1406 | return diff; | |
1407 | ||
1408 | } | |
1409 | ||
1410 | //_____________________________________________________________________________ | |
1411 | Float_t AliTRDdigitizer::GetOmegaTau(Float_t vd, Float_t b) | |
1412 | { | |
1413 | // | |
1414 | // Returns omega*tau (tan(Lorentz-angle)) for a given drift velocity <vd> | |
1415 | // and a B-field <b> for Xe/CO2 (15%). | |
1416 | // The values are according to a GARFIELD simulation. | |
1417 | // | |
1418 | ||
1419 | const Int_t kNb = 5; | |
1420 | Float_t p0[kNb] = { 0.004810, 0.007412, 0.010252, 0.013409, 0.016888 }; | |
1421 | Float_t p1[kNb] = { 0.054875, 0.081534, 0.107333, 0.131983, 0.155455 }; | |
1422 | Float_t p2[kNb] = { -0.008682, -0.012896, -0.016987, -0.020880, -0.024623 }; | |
1423 | Float_t p3[kNb] = { 0.000155, 0.000238, 0.000330, 0.000428, 0.000541 }; | |
1424 | ||
1425 | Int_t ib = ((Int_t) (10 * (b - 0.15))); | |
1426 | ib = TMath::Max( 0,ib); | |
1427 | ib = TMath::Min(kNb,ib); | |
1428 | ||
1429 | Float_t alphaL = p0[ib] | |
1430 | + p1[ib] * vd | |
1431 | + p2[ib] * vd*vd | |
1432 | + p3[ib] * vd*vd*vd; | |
1433 | ||
1434 | return TMath::Tan(alphaL); | |
793ff80c | 1435 | |
1436 | } | |
1437 |