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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 | $Log$ | |
a3c76cdc | 18 | Revision 1.21 2001/03/13 09:30:35 cblume |
19 | Update of digitization. Moved digit branch definition to AliTRD | |
20 | ||
6244debe | 21 | Revision 1.20 2001/02/25 20:19:00 hristov |
22 | Minor correction: loop variable declared only once for HP, Sun | |
23 | ||
c3a4830f | 24 | Revision 1.19 2001/02/14 18:22:26 cblume |
25 | Change in the geometry of the padplane | |
26 | ||
71d9fa7b | 27 | Revision 1.18 2001/01/26 19:56:57 hristov |
28 | Major upgrade of AliRoot code | |
29 | ||
2ab0c725 | 30 | Revision 1.17 2000/12/08 12:53:27 cblume |
31 | Change in Copy() function for HP-compiler | |
32 | ||
1948ba0c | 33 | Revision 1.16 2000/12/07 12:20:46 cblume |
34 | Go back to array compression. Use sampled PRF to speed up digitization | |
35 | ||
e153aaf6 | 36 | Revision 1.15 2000/11/23 14:34:08 cblume |
37 | Fixed bug in expansion routine of arrays (initialize buffers properly) | |
38 | ||
259b9e4b | 39 | Revision 1.14 2000/11/20 08:54:44 cblume |
40 | Switch off compression as default | |
41 | ||
c1e4b257 | 42 | Revision 1.13 2000/11/10 14:57:52 cblume |
43 | Changes in the geometry constants for the DEC compiler | |
44 | ||
dd56b762 | 45 | Revision 1.12 2000/11/01 14:53:20 cblume |
46 | Merge with TRD-develop | |
47 | ||
793ff80c | 48 | Revision 1.1.4.9 2000/10/26 17:00:22 cblume |
49 | Fixed bug in CheckDetector() | |
50 | ||
51 | Revision 1.1.4.8 2000/10/23 13:41:35 cblume | |
52 | Added protection against Log(0) in the gas gain calulation | |
53 | ||
54 | Revision 1.1.4.7 2000/10/17 02:27:34 cblume | |
55 | Get rid of global constants | |
56 | ||
57 | Revision 1.1.4.6 2000/10/16 01:16:53 cblume | |
58 | Changed timebin 0 to be the one closest to the readout | |
59 | ||
60 | Revision 1.1.4.5 2000/10/15 23:34:29 cblume | |
61 | Faster version of the digitizer | |
62 | ||
63 | Revision 1.1.4.4 2000/10/06 16:49:46 cblume | |
64 | Made Getters const | |
65 | ||
66 | Revision 1.1.4.3 2000/10/04 16:34:58 cblume | |
67 | Replace include files by forward declarations | |
68 | ||
69 | Revision 1.1.4.2 2000/09/22 14:41:10 cblume | |
70 | Bug fix in PRF. Included time response. New structure | |
71 | ||
eda4336d | 72 | Revision 1.10 2000/10/05 07:27:53 cblume |
73 | Changes in the header-files by FCA | |
74 | ||
6798b56e | 75 | Revision 1.9 2000/10/02 21:28:19 fca |
76 | Removal of useless dependecies via forward declarations | |
77 | ||
94de3818 | 78 | Revision 1.8 2000/06/09 11:10:07 cblume |
79 | Compiler warnings and coding conventions, next round | |
80 | ||
dd9a6ee3 | 81 | Revision 1.7 2000/06/08 18:32:58 cblume |
82 | Make code compliant to coding conventions | |
83 | ||
8230f242 | 84 | Revision 1.6 2000/06/07 16:27:32 cblume |
85 | Try to remove compiler warnings on Sun and HP | |
86 | ||
9d0b222b | 87 | Revision 1.5 2000/05/09 16:38:57 cblume |
88 | Removed PadResponse(). Merge problem | |
89 | ||
f0a7bf65 | 90 | Revision 1.4 2000/05/08 15:53:45 cblume |
91 | Resolved merge conflict | |
92 | ||
da581aea | 93 | Revision 1.3 2000/04/28 14:49:27 cblume |
94 | Only one declaration of iDict in MakeDigits() | |
95 | ||
96 | Revision 1.1.4.1 2000/05/08 14:42:04 cblume | |
97 | Introduced AliTRDdigitsManager | |
28329a48 | 98 | |
1befd3b2 | 99 | Revision 1.1 2000/02/28 19:00:13 cblume |
100 | Add new TRD classes | |
101 | ||
f7336fa3 | 102 | */ |
103 | ||
104 | /////////////////////////////////////////////////////////////////////////////// | |
105 | // // | |
106 | // Creates and handles digits from TRD hits // | |
107 | // // | |
108 | // The following effects are included: // | |
109 | // - Diffusion // | |
110 | // - ExB effects // | |
111 | // - Gas gain including fluctuations // | |
112 | // - Pad-response (simple Gaussian approximation) // | |
113 | // - Electronics noise // | |
114 | // - Electronics gain // | |
115 | // - Digitization // | |
116 | // - ADC threshold // | |
117 | // The corresponding parameter can be adjusted via the various // | |
118 | // Set-functions. If these parameters are not explicitly set, default // | |
119 | // values are used (see Init-function). // | |
120 | // To produce digits from a root-file with TRD-hits use the // | |
121 | // slowDigitsCreate.C macro. // | |
122 | // // | |
123 | /////////////////////////////////////////////////////////////////////////////// | |
124 | ||
6798b56e | 125 | #include <stdlib.h> |
126 | ||
f7336fa3 | 127 | #include <TMath.h> |
128 | #include <TVector.h> | |
129 | #include <TRandom.h> | |
94de3818 | 130 | #include <TROOT.h> |
131 | #include <TTree.h> | |
793ff80c | 132 | #include <TFile.h> |
133 | #include <TF1.h> | |
134 | ||
135 | #include "AliRun.h" | |
f7336fa3 | 136 | |
137 | #include "AliTRD.h" | |
793ff80c | 138 | #include "AliTRDhit.h" |
f7336fa3 | 139 | #include "AliTRDdigitizer.h" |
da581aea | 140 | #include "AliTRDdataArrayI.h" |
141 | #include "AliTRDdataArrayF.h" | |
793ff80c | 142 | #include "AliTRDsegmentArray.h" |
da581aea | 143 | #include "AliTRDdigitsManager.h" |
793ff80c | 144 | #include "AliTRDgeometry.h" |
f7336fa3 | 145 | |
146 | ClassImp(AliTRDdigitizer) | |
147 | ||
148 | //_____________________________________________________________________________ | |
149 | AliTRDdigitizer::AliTRDdigitizer():TNamed() | |
150 | { | |
151 | // | |
152 | // AliTRDdigitizer default constructor | |
153 | // | |
154 | ||
6244debe | 155 | fInputFile = NULL; |
156 | fDigits = NULL; | |
157 | fTRD = NULL; | |
158 | fGeo = NULL; | |
159 | fPRF = NULL; | |
160 | fPRFsmp = NULL; | |
161 | fTRF = NULL; | |
162 | fTRFint = NULL; | |
163 | ||
164 | fEvent = 0; | |
165 | fGasGain = 0.0; | |
166 | fNoise = 0.0; | |
167 | fChipGain = 0.0; | |
168 | fSinRange = 0.0; | |
169 | fSoutRange = 0.0; | |
170 | fADCoutRange = 0.0; | |
171 | fADCinRange = 0.0; | |
172 | fADCthreshold = 0; | |
173 | fDiffusionOn = 0; | |
174 | fDiffusionT = 0.0; | |
175 | fDiffusionL = 0.0; | |
176 | fElAttachOn = 0; | |
177 | fElAttachProp = 0.0; | |
178 | fExBOn = 0; | |
179 | fOmegaTau = 0.0; | |
180 | fPRFOn = 0; | |
181 | fTRFOn = 0; | |
182 | fDriftVelocity = 0.0; | |
183 | fPadCoupling = 0.0; | |
184 | fTimeCoupling = 0.0; | |
185 | fTimeBinWidth = 0.0; | |
186 | ||
187 | fPRFbin = 0; | |
188 | fPRFlo = 0.0; | |
189 | fPRFhi = 0.0; | |
190 | fPRFwid = 0.0; | |
191 | fPRFpad = 0; | |
192 | fTRFbin = 0; | |
193 | fTRFlo = 0.0; | |
194 | fTRFhi = 0.0; | |
195 | fTRFwid = 0.0; | |
196 | ||
197 | fCompress = kTRUE; | |
198 | fVerbose = 1; | |
199 | fSDigits = kFALSE; | |
f7336fa3 | 200 | |
201 | } | |
202 | ||
203 | //_____________________________________________________________________________ | |
204 | AliTRDdigitizer::AliTRDdigitizer(const Text_t *name, const Text_t *title) | |
205 | :TNamed(name,title) | |
206 | { | |
207 | // | |
208 | // AliTRDdigitizer default constructor | |
209 | // | |
210 | ||
da581aea | 211 | fInputFile = NULL; |
212 | fDigits = NULL; | |
213 | fTRD = NULL; | |
214 | fGeo = NULL; | |
e153aaf6 | 215 | fPRF = NULL; |
216 | fPRFsmp = NULL; | |
217 | fTRF = NULL; | |
218 | fTRFint = NULL; | |
f7336fa3 | 219 | |
da581aea | 220 | fEvent = 0; |
f7336fa3 | 221 | |
e153aaf6 | 222 | fCompress = kTRUE; |
793ff80c | 223 | fVerbose = 1; |
6244debe | 224 | fSDigits = kFALSE; |
793ff80c | 225 | |
f7336fa3 | 226 | Init(); |
227 | ||
228 | } | |
229 | ||
8230f242 | 230 | //_____________________________________________________________________________ |
dd9a6ee3 | 231 | AliTRDdigitizer::AliTRDdigitizer(const AliTRDdigitizer &d) |
8230f242 | 232 | { |
233 | // | |
234 | // AliTRDdigitizer copy constructor | |
235 | // | |
236 | ||
dd9a6ee3 | 237 | ((AliTRDdigitizer &) d).Copy(*this); |
8230f242 | 238 | |
239 | } | |
240 | ||
f7336fa3 | 241 | //_____________________________________________________________________________ |
242 | AliTRDdigitizer::~AliTRDdigitizer() | |
243 | { | |
8230f242 | 244 | // |
245 | // AliTRDdigitizer destructor | |
246 | // | |
f7336fa3 | 247 | |
248 | if (fInputFile) { | |
249 | fInputFile->Close(); | |
250 | delete fInputFile; | |
251 | } | |
252 | ||
da581aea | 253 | if (fDigits) { |
254 | delete fDigits; | |
f7336fa3 | 255 | } |
256 | ||
da581aea | 257 | if (fPRF) delete fPRF; |
793ff80c | 258 | if (fTRF) delete fTRF; |
f7336fa3 | 259 | |
260 | } | |
261 | ||
8230f242 | 262 | //_____________________________________________________________________________ |
dd9a6ee3 | 263 | AliTRDdigitizer &AliTRDdigitizer::operator=(const AliTRDdigitizer &d) |
264 | { | |
265 | // | |
266 | // Assignment operator | |
267 | // | |
268 | ||
269 | if (this != &d) ((AliTRDdigitizer &) d).Copy(*this); | |
270 | return *this; | |
271 | ||
272 | } | |
273 | ||
274 | //_____________________________________________________________________________ | |
275 | void AliTRDdigitizer::Copy(TObject &d) | |
8230f242 | 276 | { |
277 | // | |
278 | // Copy function | |
279 | // | |
280 | ||
1948ba0c | 281 | Int_t iBin; |
282 | ||
6244debe | 283 | ((AliTRDdigitizer &) d).fInputFile = NULL; |
284 | ((AliTRDdigitizer &) d).fDigits = NULL; | |
285 | ((AliTRDdigitizer &) d).fTRD = NULL; | |
286 | ((AliTRDdigitizer &) d).fGeo = NULL; | |
287 | ||
288 | ((AliTRDdigitizer &) d).fEvent = 0; | |
289 | ||
290 | ((AliTRDdigitizer &) d).fGasGain = fGasGain; | |
291 | ((AliTRDdigitizer &) d).fNoise = fNoise; | |
292 | ((AliTRDdigitizer &) d).fChipGain = fChipGain; | |
293 | ((AliTRDdigitizer &) d).fSoutRange = fSoutRange; | |
294 | ((AliTRDdigitizer &) d).fSinRange = fSinRange; | |
295 | ((AliTRDdigitizer &) d).fADCoutRange = fADCoutRange; | |
296 | ((AliTRDdigitizer &) d).fADCinRange = fADCinRange; | |
297 | ((AliTRDdigitizer &) d).fADCthreshold = fADCthreshold; | |
298 | ((AliTRDdigitizer &) d).fDiffusionOn = fDiffusionOn; | |
299 | ((AliTRDdigitizer &) d).fDiffusionT = fDiffusionT; | |
300 | ((AliTRDdigitizer &) d).fDiffusionL = fDiffusionL; | |
301 | ((AliTRDdigitizer &) d).fElAttachOn = fElAttachOn; | |
302 | ((AliTRDdigitizer &) d).fElAttachProp = fElAttachProp; | |
303 | ((AliTRDdigitizer &) d).fExBOn = fExBOn; | |
304 | ((AliTRDdigitizer &) d).fOmegaTau = fOmegaTau; | |
305 | ((AliTRDdigitizer &) d).fLorentzFactor = fLorentzFactor; | |
306 | ((AliTRDdigitizer &) d).fDriftVelocity = fDriftVelocity; | |
307 | ((AliTRDdigitizer &) d).fPadCoupling = fPadCoupling; | |
308 | ((AliTRDdigitizer &) d).fTimeCoupling = fTimeCoupling; | |
309 | ((AliTRDdigitizer &) d).fTimeBinWidth = fTimeBinWidth; | |
310 | ((AliTRDdigitizer &) d).fPRFOn = fPRFOn; | |
311 | ((AliTRDdigitizer &) d).fTRFOn = fTRFOn; | |
312 | ||
313 | ((AliTRDdigitizer &) d).fCompress = fCompress; | |
314 | ((AliTRDdigitizer &) d).fVerbose = fVerbose; | |
315 | ((AliTRDdigitizer &) d).fSDigits = fSDigits; | |
dd9a6ee3 | 316 | |
317 | fPRF->Copy(*((AliTRDdigitizer &) d).fPRF); | |
793ff80c | 318 | fTRF->Copy(*((AliTRDdigitizer &) d).fTRF); |
319 | ||
6244debe | 320 | ((AliTRDdigitizer &) d).fPRFbin = fPRFbin; |
321 | ((AliTRDdigitizer &) d).fPRFlo = fPRFlo; | |
322 | ((AliTRDdigitizer &) d).fPRFhi = fPRFhi; | |
323 | ((AliTRDdigitizer &) d).fPRFwid = fPRFwid; | |
324 | ((AliTRDdigitizer &) d).fPRFpad = fPRFpad; | |
e153aaf6 | 325 | if (((AliTRDdigitizer &) d).fPRFsmp) delete ((AliTRDdigitizer &) d).fPRFsmp; |
326 | ((AliTRDdigitizer &) d).fPRFsmp = new Float_t[fPRFbin]; | |
1948ba0c | 327 | for (iBin = 0; iBin < fPRFbin; iBin++) { |
e153aaf6 | 328 | ((AliTRDdigitizer &) d).fPRFsmp[iBin] = fPRFsmp[iBin]; |
329 | } | |
6244debe | 330 | ((AliTRDdigitizer &) d).fTRFbin = fTRFbin; |
331 | ((AliTRDdigitizer &) d).fTRFlo = fTRFlo; | |
332 | ((AliTRDdigitizer &) d).fTRFhi = fTRFhi; | |
333 | ((AliTRDdigitizer &) d).fTRFwid = fTRFwid; | |
793ff80c | 334 | if (((AliTRDdigitizer &) d).fTRFint) delete ((AliTRDdigitizer &) d).fTRFint; |
335 | ((AliTRDdigitizer &) d).fTRFint = new Float_t[fTRFbin]; | |
1948ba0c | 336 | for (iBin = 0; iBin < fTRFbin; iBin++) { |
793ff80c | 337 | ((AliTRDdigitizer &) d).fTRFint[iBin] = fTRFint[iBin]; |
6244debe | 338 | } |
339 | ||
8230f242 | 340 | } |
341 | ||
f7336fa3 | 342 | //_____________________________________________________________________________ |
343 | Int_t AliTRDdigitizer::Diffusion(Float_t driftlength, Float_t *xyz) | |
344 | { | |
345 | // | |
346 | // Applies the diffusion smearing to the position of a single electron | |
347 | // | |
348 | ||
349 | Float_t driftSqrt = TMath::Sqrt(driftlength); | |
350 | Float_t sigmaT = driftSqrt * fDiffusionT; | |
351 | Float_t sigmaL = driftSqrt * fDiffusionL; | |
352 | xyz[0] = gRandom->Gaus(xyz[0], sigmaL * fLorentzFactor); | |
353 | xyz[1] = gRandom->Gaus(xyz[1], sigmaT * fLorentzFactor); | |
354 | xyz[2] = gRandom->Gaus(xyz[2], sigmaT); | |
793ff80c | 355 | |
f7336fa3 | 356 | return 1; |
357 | ||
358 | } | |
359 | ||
360 | //_____________________________________________________________________________ | |
361 | Int_t AliTRDdigitizer::ExB(Float_t driftlength, Float_t *xyz) | |
362 | { | |
363 | // | |
364 | // Applies E x B effects to the position of a single electron | |
365 | // | |
366 | ||
367 | xyz[0] = xyz[0]; | |
793ff80c | 368 | xyz[1] = xyz[1] + fOmegaTau * driftlength; |
f7336fa3 | 369 | xyz[2] = xyz[2]; |
370 | ||
371 | return 1; | |
372 | ||
373 | } | |
374 | ||
793ff80c | 375 | //_____________________________________________________________________________ |
376 | Int_t AliTRDdigitizer::PadResponse(Float_t signal, Float_t dist, Float_t *pad) | |
377 | { | |
378 | // | |
379 | // Applies the pad response | |
380 | // | |
381 | ||
e153aaf6 | 382 | Int_t iBin = ((Int_t) (( - dist - fPRFlo) / fPRFwid)); |
383 | ||
384 | Int_t iBin0 = iBin - fPRFpad; | |
385 | Int_t iBin1 = iBin; | |
386 | Int_t iBin2 = iBin + fPRFpad; | |
387 | ||
388 | if ((iBin0 >= 0) && (iBin2 < fPRFbin)) { | |
389 | ||
390 | pad[0] = signal * fPRFsmp[iBin0]; | |
391 | pad[1] = signal * fPRFsmp[iBin1]; | |
392 | pad[2] = signal * fPRFsmp[iBin2]; | |
393 | ||
793ff80c | 394 | return 1; |
e153aaf6 | 395 | |
793ff80c | 396 | } |
397 | else { | |
e153aaf6 | 398 | |
793ff80c | 399 | return 0; |
e153aaf6 | 400 | |
793ff80c | 401 | } |
402 | ||
403 | } | |
404 | ||
405 | //_____________________________________________________________________________ | |
406 | Float_t AliTRDdigitizer::TimeResponse(Float_t time) | |
407 | { | |
408 | // | |
409 | // Applies the preamp shaper time response | |
410 | // | |
411 | ||
412 | Int_t iBin = ((Int_t) ((time - fTRFlo) / fTRFwid)); | |
413 | if ((iBin >= 0) && (iBin < fTRFbin)) { | |
414 | return fTRFint[iBin]; | |
415 | } | |
416 | else { | |
417 | return 0.0; | |
418 | } | |
419 | ||
420 | } | |
421 | ||
f7336fa3 | 422 | //_____________________________________________________________________________ |
423 | void AliTRDdigitizer::Init() | |
424 | { | |
425 | // | |
426 | // Initializes the digitization procedure with standard values | |
427 | // | |
428 | ||
6244debe | 429 | // Get the detector geometry |
430 | InitDetector(); | |
431 | ||
f7336fa3 | 432 | // The default parameter for the digitization |
a3c76cdc | 433 | fGasGain = 3300.; |
434 | fChipGain = 8.0; | |
6244debe | 435 | fNoise = 1000.; |
436 | fADCoutRange = 1023.; // 10-bit ADC | |
a3c76cdc | 437 | fADCinRange = 1000.; // 1V input range |
6244debe | 438 | fADCthreshold = 1; |
439 | ||
440 | // For the summable digits | |
441 | fSinRange = 1000000.; | |
442 | fSoutRange = 1000000.; | |
f7336fa3 | 443 | |
444 | // Transverse and longitudinal diffusion coefficients (Xe/Isobutane) | |
6244debe | 445 | fDiffusionOn = 1; |
446 | fDiffusionT = 0.060; | |
447 | fDiffusionL = 0.017; | |
f7336fa3 | 448 | |
449 | // Propability for electron attachment | |
6244debe | 450 | fElAttachOn = 0; |
451 | fElAttachProp = 0.0; | |
f7336fa3 | 452 | |
453 | // E x B effects | |
6244debe | 454 | fExBOn = 0; |
455 | // omega * tau.= arctan(Lorentz-angle) | |
456 | fOmegaTau = 0.19438031; | |
f7336fa3 | 457 | |
da581aea | 458 | // The pad response function |
6244debe | 459 | fPRFOn = 1; |
460 | fPRFlo = -3.0; | |
461 | fPRFhi = 3.0; | |
462 | fPRFbin = 120; | |
463 | fPRFwid = (fPRFhi - fPRFlo) / ((Float_t) fPRFbin); | |
464 | fPRFpad = ((Int_t) (1.0 / fPRFwid)); | |
465 | fPRF = new TF1("PRF","[0]*([1]+exp(-x*x/(2.0*[2])))",fPRFlo,fPRFhi); | |
da581aea | 466 | fPRF->SetParameter(0, 0.8872); |
467 | fPRF->SetParameter(1,-0.00573); | |
468 | fPRF->SetParameter(2, 0.454 * 0.454); | |
469 | ||
793ff80c | 470 | // The drift velocity (cm / mus) |
6244debe | 471 | fDriftVelocity = 2.0; |
472 | ||
473 | // The pad coupling factor (same number as for the TPC) | |
474 | fPadCoupling = 0.5; | |
475 | ||
476 | // The time coupling factor (same number as for the TPC) | |
477 | fTimeCoupling = 0.4; | |
478 | ||
479 | ReInit(); | |
480 | ||
481 | } | |
482 | ||
483 | //_____________________________________________________________________________ | |
484 | void AliTRDdigitizer::ReInit() | |
485 | { | |
486 | // | |
487 | // Re-initializes the digitization procedure after a change in the parameter | |
488 | // | |
489 | ||
490 | // Calculate the time bin width in ns | |
491 | fTimeBinWidth = fGeo->GetTimeBinSize() / fDriftVelocity * 1000.0; | |
492 | ||
493 | // The time response function (in ns) | |
494 | // The FWHM of the TRF is automatically set equal to the time bin width | |
495 | fTRFOn = 1; | |
496 | Float_t loTRF = -2.0 * fTimeBinWidth; | |
497 | Float_t hiTRF = 10.0 * fTimeBinWidth; | |
498 | fTRF = new TF1("TRF",TRFlandau,loTRF,hiTRF,3); | |
499 | //fTRF->SetParameter(0, 1.0 / 24.24249); | |
500 | fTRF->SetParameter(0, 5.56); | |
793ff80c | 501 | fTRF->SetParameter(1, 0.0); |
6244debe | 502 | fTRF->SetParameter(2, 0.25 * fTimeBinWidth); |
503 | fTRFbin = 120; | |
504 | fTRFlo = loTRF * fDriftVelocity / 1000.0; | |
505 | fTRFhi = hiTRF * fDriftVelocity / 1000.0; | |
506 | fTRFwid = (fTRFhi - fTRFlo) / ((Float_t) fTRFbin); | |
507 | ||
508 | // The Lorentz factor | |
509 | if (fExBOn) { | |
510 | fLorentzFactor = 1.0 / (1.0 + fOmegaTau*fOmegaTau); | |
511 | } | |
512 | else { | |
513 | fLorentzFactor = 1.0; | |
514 | } | |
793ff80c | 515 | |
516 | } | |
517 | ||
518 | //_____________________________________________________________________________ | |
6244debe | 519 | void AliTRDdigitizer::SampleTRF() |
793ff80c | 520 | { |
521 | // | |
6244debe | 522 | // Samples the time response function |
793ff80c | 523 | // |
524 | ||
525 | if (fTRFint) delete fTRFint; | |
526 | fTRFint = new Float_t[fTRFbin]; | |
6244debe | 527 | Float_t loTRF = fTRFlo / fDriftVelocity * 1000.0; |
528 | Float_t hiTRF = fTRFhi / fDriftVelocity * 1000.0; | |
793ff80c | 529 | Float_t binWidth = (hiTRF - loTRF) / ((Float_t) fTRFbin); |
530 | for (Int_t iBin = 0; iBin < fTRFbin; iBin++) { | |
6244debe | 531 | Float_t bin = (((Float_t) iBin) + 0.5) * binWidth + loTRF; |
532 | fTRFint[iBin] = fTRF->Eval(bin); | |
793ff80c | 533 | } |
534 | ||
f7336fa3 | 535 | } |
536 | ||
e153aaf6 | 537 | //_____________________________________________________________________________ |
538 | void AliTRDdigitizer::SamplePRF() | |
539 | { | |
540 | // | |
541 | // Samples the pad response function | |
542 | // | |
543 | ||
544 | if (fPRFsmp) delete fPRFsmp; | |
545 | fPRFsmp = new Float_t[fPRFbin]; | |
546 | for (Int_t iBin = 0; iBin < fPRFbin; iBin++) { | |
547 | Float_t bin = (((Float_t ) iBin) + 0.5) * fPRFwid + fPRFlo; | |
548 | fPRFsmp[iBin] = TMath::Max(fPRF->Eval(bin),0.0); | |
549 | } | |
550 | ||
551 | } | |
552 | ||
f7336fa3 | 553 | //_____________________________________________________________________________ |
554 | Bool_t AliTRDdigitizer::Open(const Char_t *name, Int_t nEvent) | |
555 | { | |
556 | // | |
557 | // Opens a ROOT-file with TRD-hits and reads in the hit-tree | |
558 | // | |
559 | ||
560 | // Connect the AliRoot file containing Geometry, Kine, and Hits | |
561 | fInputFile = (TFile*) gROOT->GetListOfFiles()->FindObject(name); | |
562 | if (!fInputFile) { | |
563 | printf("AliTRDdigitizer::Open -- "); | |
564 | printf("Open the ALIROOT-file %s.\n",name); | |
565 | fInputFile = new TFile(name,"UPDATE"); | |
566 | } | |
567 | else { | |
568 | printf("AliTRDdigitizer::Open -- "); | |
569 | printf("%s is already open.\n",name); | |
570 | } | |
571 | ||
da581aea | 572 | gAlice = (AliRun*) fInputFile->Get("gAlice"); |
573 | if (gAlice) { | |
574 | printf("AliTRDdigitizer::Open -- "); | |
575 | printf("AliRun object found on file.\n"); | |
576 | } | |
577 | else { | |
578 | printf("AliTRDdigitizer::Open -- "); | |
579 | printf("Could not find AliRun object.\n"); | |
580 | return kFALSE; | |
581 | } | |
f7336fa3 | 582 | |
583 | fEvent = nEvent; | |
584 | ||
585 | // Import the Trees for the event nEvent in the file | |
586 | Int_t nparticles = gAlice->GetEvent(fEvent); | |
587 | if (nparticles <= 0) { | |
588 | printf("AliTRDdigitizer::Open -- "); | |
589 | printf("No entries in the trees for event %d.\n",fEvent); | |
590 | return kFALSE; | |
591 | } | |
592 | ||
793ff80c | 593 | return InitDetector(); |
594 | ||
595 | } | |
596 | ||
597 | //_____________________________________________________________________________ | |
598 | Bool_t AliTRDdigitizer::InitDetector() | |
599 | { | |
600 | // | |
601 | // Sets the pointer to the TRD detector and the geometry | |
602 | // | |
603 | ||
dd9a6ee3 | 604 | // Get the pointer to the detector class and check for version 1 |
605 | fTRD = (AliTRD*) gAlice->GetDetector("TRD"); | |
606 | if (fTRD->IsVersion() != 1) { | |
6244debe | 607 | printf("AliTRDdigitizer::InitDetector -- "); |
dd9a6ee3 | 608 | printf("TRD must be version 1 (slow simulator).\n"); |
609 | exit(1); | |
610 | } | |
611 | ||
612 | // Get the geometry | |
613 | fGeo = fTRD->GetGeometry(); | |
6244debe | 614 | printf("AliTRDdigitizer::InitDetector -- "); |
dd9a6ee3 | 615 | printf("Geometry version %d\n",fGeo->IsVersion()); |
616 | ||
f7336fa3 | 617 | return kTRUE; |
618 | ||
619 | } | |
620 | ||
6244debe | 621 | //_____________________________________________________________________________ |
622 | Bool_t AliTRDdigitizer::SumSDigits() | |
623 | { | |
624 | // | |
625 | // Sums up the summable digits and creates final digits | |
626 | // Not yet implemented | |
627 | // | |
628 | ||
629 | return kFALSE; | |
630 | ||
631 | } | |
632 | ||
f7336fa3 | 633 | //_____________________________________________________________________________ |
634 | Bool_t AliTRDdigitizer::MakeDigits() | |
635 | { | |
636 | // | |
6244debe | 637 | // Creates summable digits. |
f7336fa3 | 638 | // |
639 | ||
f7336fa3 | 640 | /////////////////////////////////////////////////////////////// |
641 | // Parameter | |
642 | /////////////////////////////////////////////////////////////// | |
643 | ||
644 | // Converts number of electrons to fC | |
8230f242 | 645 | const Float_t kEl2fC = 1.602E-19 * 1.0E15; |
f7336fa3 | 646 | |
647 | /////////////////////////////////////////////////////////////// | |
648 | ||
793ff80c | 649 | // Number of pads included in the pad response |
650 | const Int_t kNpad = 3; | |
651 | ||
652 | // Number of track dictionary arrays | |
dd56b762 | 653 | const Int_t kNDict = AliTRDdigitsManager::kNDict; |
793ff80c | 654 | |
c3a4830f | 655 | Int_t iRow, iCol, iTime, iPad; |
71d9fa7b | 656 | Int_t iDict = 0; |
793ff80c | 657 | Int_t nBytes = 0; |
f7336fa3 | 658 | |
659 | Int_t totalSizeDigits = 0; | |
660 | Int_t totalSizeDict0 = 0; | |
661 | Int_t totalSizeDict1 = 0; | |
662 | Int_t totalSizeDict2 = 0; | |
663 | ||
793ff80c | 664 | AliTRDdataArrayF *signals = 0; |
665 | AliTRDdataArrayI *digits = 0; | |
8230f242 | 666 | AliTRDdataArrayI *dictionary[kNDict]; |
da581aea | 667 | |
793ff80c | 668 | // Create a digits manager |
669 | fDigits = new AliTRDdigitsManager(); | |
670 | ||
671 | // Create a container for the amplitudes | |
672 | AliTRDsegmentArray *signalsArray | |
673 | = new AliTRDsegmentArray("AliTRDdataArrayF",AliTRDgeometry::Ndet()); | |
674 | ||
da581aea | 675 | if (!fGeo) { |
676 | printf("AliTRDdigitizer::MakeDigits -- "); | |
677 | printf("No geometry defined\n"); | |
678 | return kFALSE; | |
679 | } | |
680 | ||
da581aea | 681 | printf("AliTRDdigitizer::MakeDigits -- "); |
682 | printf("Start creating digits.\n"); | |
793ff80c | 683 | if (fVerbose > 0) this->Dump(); |
f7336fa3 | 684 | |
e153aaf6 | 685 | // Create the sampled PRF |
686 | SamplePRF(); | |
687 | ||
6244debe | 688 | // Create the sampled TRF |
689 | SampleTRF(); | |
793ff80c | 690 | |
691 | // Get the pointer to the hit tree | |
692 | TTree *HitTree = gAlice->TreeH(); | |
693 | ||
694 | // Get the number of entries in the hit tree | |
695 | // (Number of primary particles creating a hit somewhere) | |
696 | Int_t nTrack = (Int_t) HitTree->GetEntries(); | |
697 | if (fVerbose > 0) { | |
698 | printf("AliTRDdigitizer::MakeDigits -- "); | |
699 | printf("Found %d primary particles\n",nTrack); | |
700 | } | |
701 | ||
702 | Int_t detectorOld = -1; | |
703 | Int_t countHits = 0; | |
704 | ||
705 | // Loop through all entries in the tree | |
706 | for (Int_t iTrack = 0; iTrack < nTrack; iTrack++) { | |
707 | ||
708 | gAlice->ResetHits(); | |
709 | nBytes += HitTree->GetEvent(iTrack); | |
710 | ||
711 | // Get the number of hits in the TRD created by this particle | |
712 | Int_t nHit = fTRD->Hits()->GetEntriesFast(); | |
713 | if (fVerbose > 0) { | |
714 | printf("AliTRDdigitizer::MakeDigits -- "); | |
715 | printf("Found %d hits for primary particle %d\n",nHit,iTrack); | |
716 | } | |
717 | ||
718 | // Loop through the TRD hits | |
719 | for (Int_t iHit = 0; iHit < nHit; iHit++) { | |
720 | ||
721 | countHits++; | |
722 | ||
723 | AliTRDhit *hit = (AliTRDhit *) fTRD->Hits()->UncheckedAt(iHit); | |
724 | Float_t pos[3]; | |
725 | pos[0] = hit->X(); | |
726 | pos[1] = hit->Y(); | |
727 | pos[2] = hit->Z(); | |
728 | Float_t q = hit->GetCharge(); | |
729 | Int_t track = hit->Track(); | |
730 | Int_t detector = hit->GetDetector(); | |
731 | Int_t plane = fGeo->GetPlane(detector); | |
732 | Int_t sector = fGeo->GetSector(detector); | |
733 | Int_t chamber = fGeo->GetChamber(detector); | |
734 | ||
735 | if (!(CheckDetector(plane,chamber,sector))) continue; | |
736 | ||
737 | Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector); | |
738 | Int_t nColMax = fGeo->GetColMax(plane); | |
739 | Int_t nTimeMax = fGeo->GetTimeMax(); | |
740 | Float_t row0 = fGeo->GetRow0(plane,chamber,sector); | |
741 | Float_t col0 = fGeo->GetCol0(plane); | |
742 | Float_t time0 = fGeo->GetTime0(plane); | |
71d9fa7b | 743 | Float_t rowPadSize = fGeo->GetRowPadSize(plane,chamber,sector); |
744 | Float_t colPadSize = fGeo->GetColPadSize(plane); | |
793ff80c | 745 | Float_t timeBinSize = fGeo->GetTimeBinSize(); |
746 | ||
747 | if (fVerbose > 1) { | |
748 | printf("Analyze hit no. %d ",iHit); | |
749 | printf("-----------------------------------------------------------\n"); | |
750 | hit->Dump(); | |
751 | printf("plane = %d, sector = %d, chamber = %d\n" | |
752 | ,plane,sector,chamber); | |
753 | printf("nRowMax = %d, nColMax = %d, nTimeMax = %d\n" | |
754 | ,nRowMax,nColMax,nTimeMax); | |
755 | printf("row0 = %f, col0 = %f, time0 = %f\n" | |
756 | ,row0,col0,time0); | |
c1e4b257 | 757 | printf("rowPadSize = %f, colPadSize = %f, timeBinSize = %f\n" |
758 | ,rowPadSize,colPadSize,timeBinSize); | |
793ff80c | 759 | } |
760 | ||
dd56b762 | 761 | // Don't analyze test hits with amplitude 0. |
762 | if (((Int_t) q) == 0) continue; | |
763 | ||
793ff80c | 764 | if (detector != detectorOld) { |
e153aaf6 | 765 | |
793ff80c | 766 | if (fVerbose > 1) { |
767 | printf("AliTRDdigitizer::MakeDigits -- "); | |
768 | printf("Get new container. New det = %d, Old det = %d\n" | |
769 | ,detector,detectorOld); | |
770 | } | |
771 | // Compress the old one if enabled | |
772 | if ((fCompress) && (detectorOld > -1)) { | |
773 | if (fVerbose > 1) { | |
774 | printf("AliTRDdigitizer::MakeDigits -- "); | |
e153aaf6 | 775 | printf("Compress the old container ..."); |
dd9a6ee3 | 776 | } |
793ff80c | 777 | signals->Compress(1,0); |
778 | for (iDict = 0; iDict < kNDict; iDict++) { | |
779 | dictionary[iDict]->Compress(1,0); | |
dd9a6ee3 | 780 | } |
793ff80c | 781 | if (fVerbose > 1) printf("done\n"); |
9d0b222b | 782 | } |
793ff80c | 783 | // Get the new container |
784 | signals = (AliTRDdataArrayF *) signalsArray->At(detector); | |
785 | if (signals->GetNtime() == 0) { | |
786 | // Allocate a new one if not yet existing | |
787 | if (fVerbose > 1) { | |
788 | printf("AliTRDdigitizer::MakeDigits -- "); | |
789 | printf("Allocate a new container ... "); | |
790 | } | |
791 | signals->Allocate(nRowMax,nColMax,nTimeMax); | |
792 | } | |
793 | else { | |
794 | // Expand an existing one | |
c1e4b257 | 795 | if (fCompress) { |
796 | if (fVerbose > 1) { | |
797 | printf("AliTRDdigitizer::MakeDigits -- "); | |
798 | printf("Expand an existing container ... "); | |
799 | } | |
800 | signals->Expand(); | |
793ff80c | 801 | } |
793ff80c | 802 | } |
803 | // The same for the dictionary | |
804 | for (iDict = 0; iDict < kNDict; iDict++) { | |
805 | dictionary[iDict] = fDigits->GetDictionary(detector,iDict); | |
806 | if (dictionary[iDict]->GetNtime() == 0) { | |
807 | dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeMax); | |
808 | } | |
809 | else { | |
810 | if (fCompress) dictionary[iDict]->Expand(); | |
811 | } | |
812 | } | |
813 | if (fVerbose > 1) printf("done\n"); | |
814 | detectorOld = detector; | |
815 | } | |
9d0b222b | 816 | |
793ff80c | 817 | // Rotate the sectors on top of each other |
818 | Float_t rot[3]; | |
819 | fGeo->Rotate(detector,pos,rot); | |
820 | ||
821 | // The driftlength | |
822 | Float_t driftlength = time0 - rot[0]; | |
823 | if ((driftlength < 0) || | |
dd56b762 | 824 | (driftlength > AliTRDgeometry::DrThick())) continue; |
793ff80c | 825 | Float_t driftlengthL = driftlength; |
826 | if (fExBOn) driftlengthL /= TMath::Sqrt(fLorentzFactor); | |
827 | ||
828 | // The hit position in pad coordinates (center pad) | |
829 | // The pad row (z-direction) | |
830 | Int_t rowH = (Int_t) ((rot[2] - row0) / rowPadSize); | |
831 | // The pad column (rphi-direction) | |
832 | Int_t colH = (Int_t) ((rot[1] - col0) / colPadSize); | |
833 | // The time bucket | |
834 | Int_t timeH = (Int_t) (driftlength / timeBinSize); | |
835 | if (fVerbose > 1) { | |
836 | printf("rowH = %d, colH = %d, timeH = %d\n" | |
837 | ,rowH,colH,timeH); | |
838 | } | |
839 | ||
840 | // Loop over all electrons of this hit | |
841 | // TR photons produce hits with negative charge | |
842 | Int_t nEl = ((Int_t) TMath::Abs(q)); | |
843 | for (Int_t iEl = 0; iEl < nEl; iEl++) { | |
844 | ||
845 | Float_t xyz[3]; | |
846 | xyz[0] = rot[0]; | |
847 | xyz[1] = rot[1]; | |
848 | xyz[2] = rot[2]; | |
849 | ||
850 | // Electron attachment | |
851 | if (fElAttachOn) { | |
852 | if (gRandom->Rndm() < (driftlengthL * fElAttachProp / 100.)) | |
853 | continue; | |
854 | } | |
855 | ||
856 | // Apply the diffusion smearing | |
857 | if (fDiffusionOn) { | |
858 | if (!(Diffusion(driftlengthL,xyz))) continue; | |
da581aea | 859 | } |
f7336fa3 | 860 | |
793ff80c | 861 | // Apply E x B effects |
862 | if (fExBOn) { | |
863 | if (!(ExB(driftlength,xyz))) continue; | |
864 | } | |
f7336fa3 | 865 | |
793ff80c | 866 | // The electron position |
867 | // The pad row (z-direction) | |
868 | Int_t rowE = (Int_t) ((xyz[2] - row0) / rowPadSize); | |
6244debe | 869 | if (( rowE < 0) || ( rowE >= nRowMax)) continue; |
793ff80c | 870 | // The pad column (rphi-direction) |
871 | Int_t colE = (Int_t) ((xyz[1] - col0) / colPadSize); | |
6244debe | 872 | if (( colE < 0) || ( colE >= nColMax)) continue; |
793ff80c | 873 | // The time bucket |
874 | Int_t timeE = (Int_t) ((time0 - xyz[0]) / timeBinSize); | |
793ff80c | 875 | if ((timeE < 0) || (timeE >= nTimeMax)) continue; |
876 | ||
877 | // Apply the gas gain including fluctuations | |
878 | Float_t ggRndm = 0.0; | |
879 | do { | |
880 | ggRndm = gRandom->Rndm(); | |
881 | } while (ggRndm <= 0); | |
882 | Int_t signal = (Int_t) (-fGasGain * TMath::Log(ggRndm)); | |
883 | ||
793ff80c | 884 | // Apply the pad response |
885 | Float_t padSignal[kNpad]; | |
886 | if (fPRFOn) { | |
887 | // The distance of the electron to the center of the pad | |
888 | // in units of pad width | |
889 | Float_t dist = (xyz[1] - col0 - (colE + 0.5) * colPadSize) | |
890 | / colPadSize; | |
891 | if (!(PadResponse(signal,dist,padSignal))) continue; | |
892 | } | |
893 | else { | |
894 | padSignal[0] = 0.0; | |
895 | padSignal[1] = signal; | |
896 | padSignal[2] = 0.0; | |
897 | } | |
f7336fa3 | 898 | |
793ff80c | 899 | // The distance of the position to the beginning of the timebin |
900 | Float_t timeOffset = (time0 - timeE * timeBinSize) - xyz[0]; | |
901 | Int_t timeTRDbeg = 0; | |
902 | Int_t timeTRDend = 1; | |
903 | if (fTRFOn) { | |
904 | timeTRDbeg = 2; | |
905 | timeTRDend = 11; | |
906 | } | |
907 | for (Int_t iTimeBin = TMath::Max(timeE - timeTRDbeg, 0) | |
6244debe | 908 | ;iTimeBin < TMath::Min(timeE + timeTRDend,nTimeMax) |
909 | ;iTimeBin++) { | |
793ff80c | 910 | |
911 | // Apply the time response | |
912 | Float_t timeResponse = 1.0; | |
913 | if (fTRFOn) { | |
914 | Float_t time = (iTimeBin - timeE) * timeBinSize + timeOffset; | |
915 | timeResponse = TimeResponse(time); | |
916 | } | |
f7336fa3 | 917 | |
793ff80c | 918 | // Add the signals |
919 | Float_t signalOld[kNpad] = { 0.0, 0.0, 0.0 }; | |
c3a4830f | 920 | for (iPad = 0; iPad < kNpad; iPad++) { |
793ff80c | 921 | Int_t colPos = colE + iPad - 1; |
922 | if (colPos < 0) continue; | |
923 | if (colPos >= nColMax) break; | |
924 | signalOld[iPad] = signals->GetData(rowE,colPos,iTimeBin); | |
925 | signalOld[iPad] += padSignal[iPad] * timeResponse; | |
926 | signals->SetData(rowE,colPos,iTimeBin,signalOld[iPad]); | |
927 | } | |
f7336fa3 | 928 | |
793ff80c | 929 | // Store the track index in the dictionary |
930 | // Note: We store index+1 in order to allow the array to be compressed | |
71d9fa7b | 931 | //for (iDict = 0; iDict < kNDict; iDict++) { |
932 | // Int_t oldTrack = dictionary[iDict]->GetData(rowE,colE,timeE); | |
933 | // if (oldTrack == track+1) break; | |
934 | // //if (oldTrack == -1) break; | |
935 | // if (oldTrack == 0) { | |
936 | // dictionary[iDict]->SetData(rowE,colE,timeE,track+1); | |
937 | // if (fVerbose > 3) { | |
938 | // printf(" track index = %d\n",track); | |
939 | // } | |
940 | // break; | |
941 | // } | |
942 | //} | |
c3a4830f | 943 | for (iPad = 0; iPad < kNpad; iPad++) { |
71d9fa7b | 944 | Int_t colPos = colE + iPad - 1; |
945 | if (colPos < 0) continue; | |
946 | if (colPos >= nColMax) break; | |
947 | if (signals->GetData(rowE,colPos,iTimeBin) > 0) { | |
948 | for (iDict = 0; iDict < kNDict; iDict++) { | |
949 | Int_t oldTrack = dictionary[iDict]->GetData(rowE,colPos,iTimeBin); | |
950 | if (oldTrack == track+1) break; | |
951 | //if (oldTrack == -1) break; | |
952 | if (oldTrack == 0) { | |
953 | dictionary[iDict]->SetData(rowE,colPos,iTimeBin,track+1); | |
71d9fa7b | 954 | break; |
955 | } | |
956 | } | |
793ff80c | 957 | } |
958 | } | |
6244debe | 959 | //if ((fVerbose > 1) && (iDict == kNDict)) { |
960 | // printf("AliTRDdigitizer::MakeDigits -- "); | |
961 | // printf("More than three tracks for one digit!\n"); | |
962 | //} | |
f7336fa3 | 963 | |
f7336fa3 | 964 | } |
965 | ||
793ff80c | 966 | } |
f7336fa3 | 967 | |
793ff80c | 968 | } |
f7336fa3 | 969 | |
793ff80c | 970 | } // All hits finished |
f7336fa3 | 971 | |
793ff80c | 972 | printf("AliTRDdigitizer::MakeDigits -- "); |
973 | printf("Finished analyzing %d hits\n",countHits); | |
974 | ||
6244debe | 975 | // The total conversion factor |
976 | Float_t convert = kEl2fC * fPadCoupling * fTimeCoupling * fChipGain; | |
977 | ||
793ff80c | 978 | // Loop through all chambers to finalize the digits |
979 | for (Int_t iDet = 0; iDet < AliTRDgeometry::Ndet(); iDet++) { | |
980 | ||
981 | Int_t plane = fGeo->GetPlane(iDet); | |
982 | Int_t sector = fGeo->GetSector(iDet); | |
983 | Int_t chamber = fGeo->GetChamber(iDet); | |
984 | Int_t nRowMax = fGeo->GetRowMax(plane,chamber,sector); | |
985 | Int_t nColMax = fGeo->GetColMax(plane); | |
986 | Int_t nTimeMax = fGeo->GetTimeMax(); | |
987 | ||
793ff80c | 988 | if (fVerbose > 0) { |
989 | printf("AliTRDdigitizer::MakeDigits -- "); | |
990 | printf("Digitization for chamber %d\n",iDet); | |
991 | } | |
da581aea | 992 | |
793ff80c | 993 | // Add a container for the digits of this detector |
994 | digits = fDigits->GetDigits(iDet); | |
995 | // Allocate memory space for the digits buffer | |
996 | digits->Allocate(nRowMax,nColMax,nTimeMax); | |
da581aea | 997 | |
793ff80c | 998 | // Get the signal container |
999 | signals = (AliTRDdataArrayF *) signalsArray->At(iDet); | |
1000 | if (signals->GetNtime() == 0) { | |
1001 | // Create missing containers | |
1002 | signals->Allocate(nRowMax,nColMax,nTimeMax); | |
1003 | } | |
1004 | else { | |
1005 | // Expand the container if neccessary | |
1006 | if (fCompress) signals->Expand(); | |
1007 | } | |
1008 | // Create the missing dictionary containers | |
1009 | for (iDict = 0; iDict < kNDict; iDict++) { | |
1010 | dictionary[iDict] = fDigits->GetDictionary(iDet,iDict); | |
1011 | if (dictionary[iDict]->GetNtime() == 0) { | |
1012 | dictionary[iDict]->Allocate(nRowMax,nColMax,nTimeMax); | |
1013 | } | |
1014 | } | |
f7336fa3 | 1015 | |
793ff80c | 1016 | Int_t nDigits = 0; |
1017 | ||
6244debe | 1018 | // Don't create noise in detectors that are switched off |
1019 | if (CheckDetector(plane,chamber,sector)) { | |
1020 | ||
1021 | // Create the digits for this chamber | |
1022 | for (iRow = 0; iRow < nRowMax; iRow++ ) { | |
1023 | for (iCol = 0; iCol < nColMax; iCol++ ) { | |
1024 | for (iTime = 0; iTime < nTimeMax; iTime++) { | |
1025 | ||
1026 | // Create summable digits | |
1027 | if (fSDigits) { | |
1028 | ||
1029 | Float_t signalAmp = signals->GetData(iRow,iCol,iTime); | |
1030 | Int_t adc = 0; | |
1031 | if (signalAmp >= fSinRange) { | |
1032 | adc = ((Int_t) fSoutRange); | |
1033 | } | |
1034 | else { | |
1035 | adc = ((Int_t) (signalAmp * (fSoutRange / fSinRange))); | |
1036 | } | |
1037 | nDigits++; | |
1038 | digits->SetData(iRow,iCol,iTime,adc); | |
f7336fa3 | 1039 | |
c1e4b257 | 1040 | } |
6244debe | 1041 | // Create normal digits |
1042 | else { | |
1043 | ||
1044 | Float_t signalAmp = signals->GetData(iRow,iCol,iTime); | |
1045 | ||
1046 | // Add the noise | |
1047 | signalAmp = TMath::Max((Double_t) gRandom->Gaus(signalAmp,fNoise),0.0); | |
1048 | // Convert to mV | |
1049 | signalAmp *= convert; | |
1050 | // Convert to ADC counts. Set the overflow-bit fADCoutRange if the | |
1051 | // signal is larger than fADCinRange | |
1052 | Int_t adc = 0; | |
1053 | if (signalAmp >= fADCinRange) { | |
1054 | adc = ((Int_t) fADCoutRange); | |
1055 | } | |
1056 | else { | |
1057 | adc = ((Int_t) (signalAmp * (fADCoutRange / fADCinRange))); | |
1058 | } | |
1059 | ||
1060 | // Store the amplitude of the digit if above threshold | |
1061 | if (adc > fADCthreshold) { | |
1062 | if (fVerbose > 2) { | |
1063 | printf(" iRow = %d, iCol = %d, iTime = %d\n" | |
1064 | ,iRow,iCol,iTime); | |
1065 | printf(" signal = %f, adc = %d\n",signalAmp,adc); | |
1066 | } | |
1067 | nDigits++; | |
1068 | digits->SetData(iRow,iCol,iTime,adc); | |
1069 | } | |
f7336fa3 | 1070 | |
6244debe | 1071 | } |
1072 | ||
1073 | } | |
1074 | } | |
793ff80c | 1075 | } |
6244debe | 1076 | |
793ff80c | 1077 | } |
1078 | ||
1079 | // Compress the arrays | |
1080 | digits->Compress(1,0); | |
1081 | for (iDict = 0; iDict < kNDict; iDict++) { | |
1082 | dictionary[iDict]->Compress(1,0); | |
1083 | } | |
f7336fa3 | 1084 | |
793ff80c | 1085 | totalSizeDigits += digits->GetSize(); |
1086 | totalSizeDict0 += dictionary[0]->GetSize(); | |
1087 | totalSizeDict1 += dictionary[1]->GetSize(); | |
1088 | totalSizeDict2 += dictionary[2]->GetSize(); | |
f7336fa3 | 1089 | |
c1e4b257 | 1090 | Float_t nPixel = nRowMax * nColMax * nTimeMax; |
793ff80c | 1091 | printf("AliTRDdigitizer::MakeDigits -- "); |
c1e4b257 | 1092 | printf("Found %d digits in detector %d (%3.0f).\n" |
1093 | ,nDigits,iDet | |
1094 | ,100.0 * ((Float_t) nDigits) / nPixel); | |
da581aea | 1095 | |
793ff80c | 1096 | if (fCompress) signals->Compress(1,0); |
f7336fa3 | 1097 | |
f7336fa3 | 1098 | } |
1099 | ||
da581aea | 1100 | printf("AliTRDdigitizer::MakeDigits -- "); |
8230f242 | 1101 | printf("Total number of analyzed hits = %d\n",countHits); |
da581aea | 1102 | |
f7336fa3 | 1103 | printf("AliTRDdigitizer::MakeDigits -- "); |
1104 | printf("Total digits data size = %d, %d, %d, %d\n",totalSizeDigits | |
1105 | ,totalSizeDict0 | |
1106 | ,totalSizeDict1 | |
1107 | ,totalSizeDict2); | |
1108 | ||
1109 | return kTRUE; | |
1110 | ||
1111 | } | |
1112 | ||
793ff80c | 1113 | //_____________________________________________________________________________ |
1114 | Bool_t AliTRDdigitizer::CheckDetector(Int_t plane, Int_t chamber, Int_t sector) | |
1115 | { | |
1116 | // | |
1117 | // Checks whether a detector is enabled | |
1118 | // | |
1119 | ||
1120 | if ((fTRD->GetSensChamber() >= 0) && | |
1121 | (fTRD->GetSensChamber() != chamber)) return kFALSE; | |
1122 | if ((fTRD->GetSensPlane() >= 0) && | |
c1e4b257 | 1123 | (fTRD->GetSensPlane() != plane)) return kFALSE; |
793ff80c | 1124 | if ( fTRD->GetSensSector() >= 0) { |
1125 | Int_t sens1 = fTRD->GetSensSector(); | |
1126 | Int_t sens2 = sens1 + fTRD->GetSensSectorRange(); | |
1127 | sens2 -= ((Int_t) (sens2 / AliTRDgeometry::Nsect())) | |
1128 | * AliTRDgeometry::Nsect(); | |
1129 | if (sens1 < sens2) { | |
1130 | if ((sector < sens1) || (sector >= sens2)) return kFALSE; | |
1131 | } | |
1132 | else { | |
1133 | if ((sector < sens1) && (sector >= sens2)) return kFALSE; | |
1134 | } | |
1135 | } | |
1136 | ||
1137 | return kTRUE; | |
1138 | ||
1139 | } | |
1140 | ||
f7336fa3 | 1141 | //_____________________________________________________________________________ |
1142 | Bool_t AliTRDdigitizer::WriteDigits() | |
1143 | { | |
1144 | // | |
1145 | // Writes out the TRD-digits and the dictionaries | |
1146 | // | |
1147 | ||
1148 | // Create the branches | |
1149 | if (!(gAlice->TreeD()->GetBranch("TRDdigits"))) { | |
6244debe | 1150 | return kFALSE; |
1151 | //if (!fDigits->MakeBranch()) { | |
1152 | // printf("AliTRDdigitizer::WriteDigits -- "); | |
1153 | // printf("MakeBranch failed.\n"); | |
1154 | // return kFALSE; | |
1155 | //} | |
f7336fa3 | 1156 | } |
1157 | ||
da581aea | 1158 | // Store the digits and the dictionary in the tree |
1159 | fDigits->WriteDigits(); | |
f7336fa3 | 1160 | |
1161 | // Write the new tree into the input file (use overwrite option) | |
71d9fa7b | 1162 | Char_t treeName[15]; |
f7336fa3 | 1163 | sprintf(treeName,"TreeD%d",fEvent); |
1164 | printf("AliTRDdigitizer::WriteDigits -- "); | |
1165 | printf("Write the digits tree %s for event %d.\n" | |
1166 | ,treeName,fEvent); | |
2ab0c725 | 1167 | gAlice->TreeD()->Write(treeName,TObject::kOverwrite); |
f7336fa3 | 1168 | |
1169 | return kTRUE; | |
1170 | ||
1171 | } | |
793ff80c | 1172 | |
1173 | //_____________________________________________________________________________ | |
1174 | void AliTRDdigitizer::SetPRF(TF1 *prf) | |
1175 | { | |
1176 | // | |
1177 | // Defines a new pad response function | |
1178 | // | |
1179 | ||
1180 | if (fPRF) delete fPRF; | |
1181 | fPRF = prf; | |
1182 | ||
1183 | } | |
1184 | ||
1185 | //_____________________________________________________________________________ | |
1186 | void AliTRDdigitizer::SetTRF(TF1 *trf) | |
1187 | { | |
1188 | // | |
1189 | // Defines a new time response function | |
1190 | // | |
1191 | ||
1192 | if (fTRF) delete fTRF; | |
1193 | fTRF = trf; | |
1194 | ||
1195 | } | |
1196 | ||
1197 | //_____________________________________________________________________________ | |
1198 | Double_t TRFlandau(Double_t *x, Double_t *par) | |
1199 | { | |
1200 | ||
1201 | Double_t xx = x[0]; | |
1202 | Double_t landau = par[0] * TMath::Landau(xx,par[1],par[2]); | |
1203 | ||
1204 | return landau; | |
1205 | ||
1206 | } |