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5e319bd5 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id: AliADDigitizer.cxx $ */
17
18///_________________________________________________________________________
19///
20/// This class constructs Digits out of Hits
21///
22///
23
24// --- Standard library ---
25
26// --- ROOT system ---
27#include <TMath.h>
28#include <TTree.h>
29#include <TMap.h>
30#include <TGeoManager.h>
31#include <TGeoPhysicalNode.h>
32#include <AliGeomManager.h>
33#include <TRandom.h>
34#include <TF1.h>
35#include <TH1F.h>
36
37// --- AliRoot header files ---
38#include "AliRun.h"
36507bb2 39#include "AliDetector.h"
5e319bd5 40#include "AliAD.h"
41#include "AliADhit.h"
aa8120bb 42#include "AliADConst.h"
5e319bd5 43#include "AliRunLoader.h"
44#include "AliLoader.h"
45#include "AliGRPObject.h"
46#include "AliDigitizationInput.h"
47#include "AliCDBManager.h"
48#include "AliCDBStorage.h"
49#include "AliCDBEntry.h"
aa8120bb 50#include "AliADCalibData.h"
5e319bd5 51#include "AliCTPTimeParams.h"
52#include "AliLHCClockPhase.h"
53#include "AliADdigit.h"
54#include "AliADDigitizer.h"
aa8120bb 55#include "AliADSDigit.h"
9d146a93 56#include "AliADTriggerSimulator.h"
5e319bd5 57
58ClassImp(AliADDigitizer)
59
aa8120bb 60//____________________________________________________________________________
61 AliADDigitizer::AliADDigitizer()
62 :AliDigitizer(),
63 fCalibData(GetCalibData()),
64 fNdigits(0),
65 fDigits(0),
66 fSignalShape(NULL),
67 fPMResponse(NULL),
68 fSinglePhESpectrum(NULL),
69 fEvenOrOdd(kFALSE),
70 fTask(kHits2Digits),
71 fAD(NULL)
5e319bd5 72{
73 // default constructor
aa8120bb 74 // Initialize OCDB and containers used in the digitization
75
76 Init();
5e319bd5 77}
78
79//____________________________________________________________________________
aa8120bb 80 AliADDigitizer::AliADDigitizer(AliAD *AD, DigiTask_t task)
81 :AliDigitizer(),
82 fCalibData(GetCalibData()),
83 fNdigits(0),
84 fDigits(0),
85 fSignalShape(NULL),
86 fPMResponse(NULL),
87 fSinglePhESpectrum(NULL),
88 fEvenOrOdd(kFALSE),
89 fTask(task),
90 fAD(AD)
91{
92 // constructor
93 // Initialize OCDB and containers used in the digitization
94
95 Init();
96}
97
98//____________________________________________________________________________
99 AliADDigitizer::AliADDigitizer(AliDigitizationInput* digInput)
100 :AliDigitizer(digInput),
101 fCalibData(GetCalibData()),
102 fNdigits(0),
103 fDigits(0),
104 fSignalShape(NULL),
105 fPMResponse(NULL),
106 fSinglePhESpectrum(NULL),
107 fEvenOrOdd(kFALSE),
108 fTask(kHits2Digits),
109 fAD(NULL)
5e319bd5 110{
111 // constructor
aa8120bb 112 // Initialize OCDB and containers used in the digitization
113
114 Init();
5e319bd5 115}
116
117//____________________________________________________________________________
aa8120bb 118 AliADDigitizer::~AliADDigitizer()
5e319bd5 119{
120 // destructor
121
122 if (fDigits) {
123 fDigits->Delete();
124 delete fDigits;
125 fDigits=0;
126 }
127
aa8120bb 128 if (fSignalShape) {
129 delete fSignalShape;
130 fSignalShape = NULL;
131 }
132 if (fPMResponse) {
133 delete fPMResponse;
134 fPMResponse = NULL;
135 }
136 if (fSinglePhESpectrum) {
137 delete fSinglePhESpectrum;
138 fSinglePhESpectrum = NULL;
139 }
140
141 for(Int_t i = 0 ; i < 16; ++i) {
142 if (fTime[i]) delete [] fTime[i];
143 }
5e319bd5 144}
145
146//____________________________________________________________________________
147Bool_t AliADDigitizer::Init()
148{
aa8120bb 149 // Initialises the digitizer
150 // Initialize OCDB and containers used in the digitization
151
152 // check if the digitizer was already initialized
153 if (fSignalShape) return kTRUE;
aa8120bb 154 fSignalShape = new TF1("ADSignalShape",this,&AliADDigitizer::SignalShape,0,200,6,"AliADDigitizer","SignalShape");
33037845 155 fPMResponse = new TF1("ADPMResponse",this,&AliADDigitizer::PMResponse,-kPMRespTime,2.*kPMRespTime,0,"AliADDigitizer","PMResponse");
156 fSinglePhESpectrum = new TF1("ADSinglePhESpectrum",this,&AliADDigitizer::SinglePhESpectrum,0,20,0,"AliADDigitizer","SinglePhESpectrum");
aa8120bb 157 // fSignalShape->SetParameters(0,1.57345e1,-4.25603e-1,2.9,6.40982,3.69339e-01);
158 // fSignalShape->SetParameters(1.34330e+00,1.13007e+02,-4.95705e-01,
159 // 3.68911e+00,1.01040e+00, 3.94675e-01);
160 fSignalShape->SetParameters(-1.07335e+00,2.16002e+01,-1.26133e-01,
161 1.41619e+00,5.50334e-01,3.86111e-01);
aa8120bb 162
163 // Now get the CTP L0->L1 delay
164 AliCDBEntry *entry = AliCDBManager::Instance()->Get("GRP/CTP/CTPtiming");
165 if (!entry) AliFatal("CTP timing parameters are not found in OCDB !");
166 AliCTPTimeParams *ctpParams = (AliCTPTimeParams*)entry->GetObject();
167 Float_t l1Delay = (Float_t)ctpParams->GetDelayL1L0()*25.0;
168
169 AliCDBEntry *entry1 = AliCDBManager::Instance()->Get("GRP/CTP/TimeAlign");
170 if (!entry1) AliFatal("CTP time-alignment is not found in OCDB !");
171 AliCTPTimeParams *ctpTimeAlign = (AliCTPTimeParams*)entry1->GetObject();
172 l1Delay += ((Float_t)ctpTimeAlign->GetDelayL1L0()*25.0);
173
68865a3d 174 AliCDBEntry *entry2 = AliCDBManager::Instance()->Get("AD/Calib/TimeDelays");
aa8120bb 175 if (!entry2) AliFatal("AD time delays are not found in OCDB !");
176 TH1F *delays = (TH1F*)entry2->GetObject();
177
178 AliCDBEntry *entry3 = AliCDBManager::Instance()->Get("GRP/Calib/LHCClockPhase");
179 if (!entry3) AliFatal("LHC clock-phase shift is not found in OCDB !");
180 AliLHCClockPhase *phase = (AliLHCClockPhase*)entry3->GetObject();
181
182 for(Int_t i = 0 ; i < 16; ++i) {
183
184 for(Int_t j = 0; j < kNClocks; ++j) fAdc[i][j] = 0;
185 fLeadingTime[i] = fTimeWidth[i] = 0;
186
187 fPmGain[i] = fCalibData->GetGain(i);
188
189 fAdcPedestal[i][0] = fCalibData->GetPedestal(i);
190 fAdcSigma[i][0] = fCalibData->GetSigma(i);
191 fAdcPedestal[i][1] = fCalibData->GetPedestal(i+16);
192 fAdcSigma[i][1] = fCalibData->GetSigma(i+16);
193
194 Int_t board = AliADCalibData::GetBoardNumber(i);
195 fNBins[i] = TMath::Nint(((Float_t)(fCalibData->GetMatchWindow(board)+1)*25.0+
196 (Float_t)kMaxTDCWidth*fCalibData->GetWidthResolution(board))/
197 fCalibData->GetTimeResolution(board));
198 fNBinsLT[i] = TMath::Nint(((Float_t)(fCalibData->GetMatchWindow(board)+1)*25.0)/
199 fCalibData->GetTimeResolution(board));
200 fBinSize[i] = fCalibData->GetTimeResolution(board);
9d146a93 201
202 fHptdcOffset[i] = (((Float_t)fCalibData->GetRollOver(board)-
203 (Float_t)fCalibData->GetTriggerCountOffset(board))*25.0
204 //+fCalibData->GetTimeOffset(i)
205 +delays->GetBinContent(16-i) - 250);
206 //-l1Delay-
207 //-phase->GetMeanPhase()
208 //+kADOffset);
68865a3d 209
aa8120bb 210 fClockOffset[i] = (((Float_t)fCalibData->GetRollOver(board)-
9d146a93 211 (Float_t)fCalibData->GetTriggerCountOffset(board))*25.0
212 +fCalibData->GetTimeOffset(i) - 250);
213 //-l1Delay
214 //+kADOffset);
aa8120bb 215
216 fTime[i] = new Float_t[fNBins[i]];
217 memset(fTime[i],0,fNBins[i]*sizeof(Float_t));
9d146a93 218
aa8120bb 219 }
9d146a93 220 //std::cout<<"AD: "<<" fNBins = "<<fNBins[0]<<" fNBinsLT = "<<fNBinsLT[0]<<" fHptdcOffset = "<<fHptdcOffset[0]<<" fClockOffset = "<<fClockOffset[0]<<std::endl;
aa8120bb 221 return kTRUE;
222
5e319bd5 223}
5e319bd5 224
aa8120bb 225//____________________________________________________________________________
5e319bd5 226void AliADDigitizer::Digitize(Option_t* /*option*/)
227{
228 // Creates digits from hits
aa8120bb 229 fNdigits = 0;
230
231 if (fAD && !fDigInput) {
232 AliLoader *loader = fAD->GetLoader();
233 if (!loader) {
234 AliError("Can not get AD Loader via AliAD object!");
235 return;
236 }
237 AliRunLoader* runLoader = AliRunLoader::Instance();
238 for (Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); ++iEvent) {
239 runLoader->GetEvent(iEvent);
240 if (fTask == kHits2Digits) {
241 DigitizeHits();
242 DigitizeSDigits();
243 WriteDigits(loader);
244 }
245 else {
246 DigitizeHits();
247 WriteSDigits(loader);
248 }
249 }
250 }
251 else if (fDigInput) {
252 ReadSDigits();
253 DigitizeSDigits();
254 AliRunLoader *currentLoader = AliRunLoader::GetRunLoader(fDigInput->GetOutputFolderName());
255 AliLoader *loader = currentLoader->GetLoader("ADLoader");
256 if (!loader) {
257 AliError("Cannot get AD Loader via RunDigitizer!");
258 return;
259 }
260 WriteDigits(loader);
261 }
262 else {
263 AliFatal("Invalid digitization task! Exiting!");
264 }
265}
266
267//____________________________________________________________________________
268void AliADDigitizer::DigitizeHits()
269{
270 // Digitize the hits to the level of
271 // SDigits (fTime arrays)
272
273 for(Int_t i = 0 ; i < 16; ++i) {
274 memset(fTime[i],0,fNBins[i]*sizeof(Float_t));
275 fLabels[i][0] = fLabels[i][1] = fLabels[i][2] = -1;
276 }
277 Float_t integral = fPMResponse->Integral(-kPMRespTime,2.*kPMRespTime);
278 Float_t meansPhE = fSinglePhESpectrum->Mean(0,20);
279
280 AliLoader* loader = fAD->GetLoader();
281 if (!loader) {
282 AliError("Can not get AD Loader!");
283 return;
284 }
285 loader->LoadHits();
286 TTree* treeH = loader->TreeH();
287 if (!treeH) {
288 AliError("Cannot get TreeH!");
289 return;
290 }
291 TClonesArray* hits = fAD->Hits();
292
293// Now makes Digits from hits
294 Int_t nTracks = (Int_t) treeH->GetEntries();
295 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
296 fAD->ResetHits();
297 treeH->GetEvent(iTrack);
298 Int_t nHits = hits->GetEntriesFast();
299 for (Int_t iHit = 0; iHit < nHits; iHit++) {
300 AliADhit* hit = (AliADhit *)hits->UncheckedAt(iHit);
301 Int_t nPhot = hit->GetNphot();
302 Int_t pmt = hit->GetCell();//One PM per cell in AD
303 if (pmt < 0) continue;
304 Int_t trackLabel = hit->GetTrack();
305 for(Int_t l = 0; l < 3; ++l) {
306 if (fLabels[pmt][l] < 0) {
307 fLabels[pmt][l] = trackLabel;
308 break;
309 }
310 }
311 Float_t dt_scintillator = gRandom->Gaus(0,kIntTimeRes);
312 Float_t t = dt_scintillator + hit->GetTof();
9d146a93 313 t += fHptdcOffset[pmt];
68865a3d 314
122c9ddc 315 Float_t charge = nPhot*fPmGain[pmt]*fBinSize[pmt]/integral;
68865a3d 316
122c9ddc 317 Float_t tPhE = t + fSignalShape->GetRandom(0,fBinSize[pmt]*Float_t(fNBins[pmt]));
68865a3d 318
aa8120bb 319 Int_t firstBin = TMath::Max(0,(Int_t)((tPhE-kPMRespTime)/fBinSize[pmt]));
320 Int_t lastBin = TMath::Min(fNBins[pmt]-1,(Int_t)((tPhE+2.*kPMRespTime)/fBinSize[pmt]));
9d146a93 321 //std::cout<<"Bins: "<<firstBin*fBinSize[pmt]<<" - "<<lastBin*fBinSize[pmt]<<std::endl;
322 //std::cout<<"Bins: "<<firstBin<<" - "<<lastBin<<std::endl;
beca6103 323
aa8120bb 324 for(Int_t iBin = firstBin; iBin <= lastBin; ++iBin) {
325 Float_t tempT = fBinSize[pmt]*(0.5+iBin)-tPhE;
122c9ddc 326 fTime[pmt][iBin] += charge*fPMResponse->Eval(tempT);
aa8120bb 327 }
aa8120bb 328 } // hit loop
329 } // track loop
330 loader->UnloadHits();
331}
5e319bd5 332
aa8120bb 333//____________________________________________________________________________
334void AliADDigitizer::DigitizeSDigits()
335{
336 // Digitize the fTime arrays (SDigits) to the level of
337 // Digits (fAdc arrays)
338 for(Int_t i = 0 ; i < 16; ++i) {
339 for(Int_t j = 0; j < kNClocks; ++j) fAdc[i][j] = 0;
340 fLeadingTime[i] = fTimeWidth[i] = 0;
341 }
5e319bd5 342
aa8120bb 343 Float_t maximum = 0.9*fSignalShape->GetMaximum(0,200); // Not exact, one needs to do this on the convoluted
344 Float_t integral2 = fSignalShape->Integral(0,200); // function. Anyway the effect is small <10% on the 2.5 ADC thr
345 for (Int_t ipmt = 0; ipmt < 16; ++ipmt) {
346 Float_t thr = fCalibData->GetCalibDiscriThr(ipmt,kFALSE)*kChargePerADC*maximum*fBinSize[ipmt]/integral2;
aa8120bb 347
348 Bool_t ltFound = kFALSE, ttFound = kFALSE;
349 for (Int_t iBin = 0; iBin < fNBins[ipmt]; ++iBin) {
350 Float_t t = fBinSize[ipmt]*Float_t(iBin);
aa8120bb 351 if (fTime[ipmt][iBin] > thr) {
352 if (!ltFound && (iBin < fNBinsLT[ipmt])) {
353 ltFound = kTRUE;
354 fLeadingTime[ipmt] = t;
5e319bd5 355 }
aa8120bb 356 }
357 else {
358 if (ltFound) {
359 if (!ttFound) {
360 ttFound = kTRUE;
361 fTimeWidth[ipmt] = t - fLeadingTime[ipmt];
362 }
5e319bd5 363 }
aa8120bb 364 }
9d146a93 365 Float_t tadc = t - fClockOffset[ipmt];
aa8120bb 366 Int_t clock = kNClocks/2 - Int_t(tadc/25.0);
367 if (clock >= 0 && clock < kNClocks)
368 fAdc[ipmt][clock] += fTime[ipmt][iBin]/kChargePerADC;
369 }
370 AliDebug(1,Form("Channel %d Offset %f Time %f",ipmt,fClockOffset[ipmt],fLeadingTime[ipmt]));
371 Int_t board = AliADCalibData::GetBoardNumber(ipmt);
372 if (ltFound && ttFound) {
373 fTimeWidth[ipmt] = fCalibData->GetWidthResolution(board)*
374 Float_t(Int_t(fTimeWidth[ipmt]/fCalibData->GetWidthResolution(board)));
375 if (fTimeWidth[ipmt] < Float_t(kMinTDCWidth)*fCalibData->GetWidthResolution(board))
376 fTimeWidth[ipmt] = Float_t(kMinTDCWidth)*fCalibData->GetWidthResolution(board);
377 if (fTimeWidth[ipmt] > Float_t(kMaxTDCWidth)*fCalibData->GetWidthResolution(board))
378 fTimeWidth[ipmt] = Float_t(kMaxTDCWidth)*fCalibData->GetWidthResolution(board);
379 }
380 }
381
382 fEvenOrOdd = gRandom->Integer(2);
383 for (Int_t j=0; j<16; ++j){
384 for (Int_t iClock = 0; iClock < kNClocks; ++iClock) {
385 Int_t integrator = (iClock + fEvenOrOdd) % 2;
386 AliDebug(1,Form("ADC %d %d %f",j,iClock,fAdc[j][iClock]));
387 fAdc[j][iClock] += gRandom->Gaus(fAdcPedestal[j][integrator], fAdcSigma[j][integrator]);
388 }
389 }
9d146a93 390 //Fill BB and BG flags in trigger simulator
391 AliADTriggerSimulator * triggerSimulator = new AliADTriggerSimulator();
392 triggerSimulator->FillFlags(fBBFlag,fBGFlag,fLeadingTime);
393
aa8120bb 394}
395
396//____________________________________________________________________________
397void AliADDigitizer::ReadSDigits()
398{
399 // Read SDigits which are then to precessed
400 // in the following method
401 for(Int_t i = 0 ; i < 16; ++i) {
402 memset(fTime[i],0,fNBins[i]*sizeof(Float_t));
403 fLabels[i][0] = fLabels[i][1] = fLabels[i][2] = -1;
404 }
405
406 // Loop over input files
407 Int_t nFiles= fDigInput->GetNinputs();
408 for (Int_t inputFile = 0; inputFile < nFiles; inputFile++) {
409 // Get the current loader
410 AliRunLoader* currentLoader =
411 AliRunLoader::GetRunLoader(fDigInput->GetInputFolderName(inputFile));
412
413 AliLoader *loader = currentLoader->GetLoader("ADLoader");
414 loader->LoadSDigits("READ");
5e319bd5 415
aa8120bb 416 // Get the tree of summable digits
417 TTree* sdigitsTree = loader->TreeS();
418 if (!sdigitsTree) {
419 AliError("No sdigit tree from digInput");
420 continue;
421 }
422
423 // Get the branch
424 TBranch* sdigitsBranch = sdigitsTree->GetBranch("ADSDigit");
425 if (!sdigitsBranch) {
426 AliError("Failed to get sdigit branch");
427 return;
428 }
429
430 // Set the branch address
431 TClonesArray *sdigitsArray = NULL;
432 sdigitsBranch->SetAddress(&sdigitsArray);
433
434 // Sum contributions from the sdigits
435 // Get number of entries in the tree
436 Int_t nentries = Int_t(sdigitsBranch->GetEntries());
437 for (Int_t entry = 0; entry < nentries; ++entry) {
438 sdigitsBranch->GetEntry(entry);
439 // Get the number of sdigits
440 Int_t nsdigits = sdigitsArray->GetEntries();
36507bb2 441
aa8120bb 442 for (Int_t sdigit = 0; sdigit < nsdigits; sdigit++) {
443 AliADSDigit* sDigit = static_cast<AliADSDigit*>(sdigitsArray->UncheckedAt(sdigit));
444 Int_t pmNumber = sDigit->PMNumber();
445 Int_t nbins = sDigit->GetNBins();
446 if (nbins != fNBins[pmNumber]) {
447 AliError(Form("Incompatible number of bins between digitizer (%d) and sdigit (%d) for PM %d! Skipping sdigit!",
448 fNBins[pmNumber],nbins,pmNumber));
449 continue;
5e319bd5 450 }
aa8120bb 451 // Sum the charges
452 Float_t *charges = sDigit->GetCharges();
453 for(Int_t iBin = 0; iBin < nbins; ++iBin) fTime[pmNumber][iBin] += charges[iBin];
aa8120bb 454 // and the labels
455 Int_t *labels = sDigit->GetTracks();
456 Int_t j = 0;
457 for(Int_t i = 0; i < 3; ++i) {
458 if (fLabels[pmNumber][i] < 0) {
459 if (labels[j] < 0) break;
460 fLabels[pmNumber][i] = labels[j];
461 j++;
462 }
463 }
464 }
465 }
466 loader->UnloadSDigits();
467 }
468}
469
470
471//____________________________________________________________________________
472void AliADDigitizer::WriteDigits(AliLoader *loader)
473{
474 // Take fAdc arrays filled by the previous
475 // method and produce and add digits to the digit Tree
476
477 loader->LoadDigits("UPDATE");
478
479 if (!loader->TreeD()) loader->MakeTree("D");
480 loader->MakeDigitsContainer();
481 TTree* treeD = loader->TreeD();
482 DigitsArray();
483 treeD->Branch("ADDigit", &fDigits);
484
485 Short_t *chargeADC = new Short_t[kNClocks];
486 for (Int_t i=0; i<16; i++) {
487 for (Int_t j = 0; j < kNClocks; ++j) {
488 Int_t tempadc = Int_t(fAdc[i][j]);
489 if (tempadc > 1023) tempadc = 1023;
490 chargeADC[j] = tempadc;
491 }
9d146a93 492 AddDigit(i, fLeadingTime[i], fTimeWidth[i], Bool_t((10+fEvenOrOdd)%2), chargeADC, fBBFlag[i], fBGFlag[i], fLabels[i]);
aa8120bb 493 }
494 delete [] chargeADC;
495
496 treeD->Fill();
497 loader->WriteDigits("OVERWRITE");
498 loader->UnloadDigits();
499 ResetDigits();
500}
501
502//____________________________________________________________________________
503void AliADDigitizer::WriteSDigits(AliLoader *loader)
504{
505 // Take fTime arrays filled by the previous
506 // method and produce and add sdigits to the sdigit Tree
507
508 loader->LoadSDigits("UPDATE");
509
510 if (!loader->TreeS()) loader->MakeTree("S");
511 loader->MakeSDigitsContainer();
512 TTree* treeS = loader->TreeS();
513 SDigitsArray();
514 treeS->Branch("ADSDigit", &fDigits);
36507bb2 515 //fAD->MakeBranchInTree(treeS,"AD",&fDigits,8000,"");
aa8120bb 516
517 for (Int_t ipmt = 0; ipmt < 16; ++ipmt) {
518 AddSDigit(ipmt,fNBins[ipmt],fTime[ipmt],fLabels[ipmt]);
519 }
520
521 treeS->Fill();
522 loader->WriteSDigits("OVERWRITE");
523 loader->UnloadSDigits();
524 ResetDigits();
525}
526
527
528
529//____________________________________________________________________________
9d146a93 530void AliADDigitizer::AddDigit(Int_t pmnumber, Float_t time, Float_t width, Bool_t integrator, Short_t *chargeADC, Bool_t bbFlag, Bool_t bgFlag, Int_t *labels)
aa8120bb 531 {
532
533// Adds Digit
534
535 TClonesArray &ldigits = *fDigits;
536
9d146a93 537 new(ldigits[fNdigits++]) AliADdigit(pmnumber,time,width,integrator,chargeADC,bbFlag,bgFlag,labels);
aa8120bb 538
539}
540//____________________________________________________________________________
541void AliADDigitizer::AddSDigit(Int_t pmnumber, Int_t nbins, Float_t *charges, Int_t *labels)
542 {
543
544// Adds SDigit
545
546 TClonesArray &ldigits = *fDigits;
547
548 new(ldigits[fNdigits++]) AliADSDigit(pmnumber,nbins,charges,labels);
549
550}
551//____________________________________________________________________________
552void AliADDigitizer::ResetDigits()
553{
554
555// Clears Digits
556
557 fNdigits = 0;
558 if (fDigits) fDigits->Clear();
559}
560
561//____________________________________________________________________________
562AliADCalibData* AliADDigitizer::GetCalibData() const
563
564{
68865a3d 565AliCDBManager *man = AliCDBManager::Instance();
aa8120bb 566
567 AliCDBEntry *entry=0;
568
569 entry = man->Get("AD/Calib/Data");
68865a3d 570 if(!entry){
571 AliWarning("Load of calibration data from default storage failed!");
572 AliWarning("Calibration data will be loaded from local storage ($ALICE_ROOT)");
573
574 man->SetDefaultStorage("local://$ALICE_ROOT/OCDB");
575 man->SetRun(1);
576 entry = man->Get("AD/Calib/Data");
577 }
578 // Retrieval of data in directory AD/Calib/Data:
aa8120bb 579
580 AliADCalibData *calibdata = 0;
581
582 if (entry) calibdata = (AliADCalibData*) entry->GetObject();
583 if (!calibdata) AliFatal("No calibration data from calibration database !");
68865a3d 584
aa8120bb 585 return calibdata;
586
5e319bd5 587}
588
589//____________________________________________________________________________
aa8120bb 590double AliADDigitizer::SignalShape(double *x, double *par)
591{
592 // this function simulates the time
593 // of arrival of the photons at the
594 // photocathode
595 Double_t xx = x[0];
596 if (xx <= par[0]) return 0;
597 Double_t a = 1./TMath::Power((xx-par[0])/par[1],1./par[2]);
598 if (xx <= par[3]) return a;
599 Double_t b = 1./TMath::Power((xx-par[3])/par[4],1./par[5]);
600 Double_t f = a*b/(a+b);
601 AliDebug(100,Form("x=%f func=%f",xx,f));
602 return f;
5e319bd5 603}
aa8120bb 604
5e319bd5 605//____________________________________________________________________________
aa8120bb 606double AliADDigitizer::PMResponse(double *x, double * /* par */)
607{
608 // this function describes the
609 // PM time response to a single
610 // photoelectron
611 Double_t xx = x[0]+kPMRespTime;
612 return xx*xx*TMath::Exp(-xx*xx/(kPMRespTime*kPMRespTime));
5e319bd5 613}
614
615//____________________________________________________________________________
aa8120bb 616double AliADDigitizer::SinglePhESpectrum(double *x, double * /* par */)
5e319bd5 617{
aa8120bb 618 // this function describes the
619 // PM amplitude response to a single
620 // photoelectron
621 Double_t xx = x[0];
622 if (xx < 0) return 0;
623 return (TMath::Poisson(xx,kPMNbOfSecElec)+kPMTransparency*TMath::Poisson(xx,1.0));
624}
625//____________________________________________________________________
626TClonesArray* AliADDigitizer::DigitsArray()
627{
628 // Initialize digit array if not already and
629 // return pointer to it.
630 if (!fDigits) {
631 fDigits = new TClonesArray("AliADdigit", 16);
632 fNdigits = 0;
633 }
634 return fDigits;
635}
636
637//____________________________________________________________________
638TClonesArray* AliADDigitizer::SDigitsArray()
639{
640 // Initialize sdigit array if not already and
641 // return pointer to it.
642 if (!fDigits) {
643 fDigits = new TClonesArray("AliADSDigit", 16);
644 fNdigits = 0;
645 }
646 return fDigits;
5e319bd5 647}
648