1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 //_________________________________________________________________________
20 //////////////////////////////////////////////////////////////////////////////
21 // Class performs digitization of Summable digits from simulated data
23 // In addition it performs mixing/embedding of summable digits from different events.
25 // For each event 3 branches are created in TreeD:
26 // "EMCAL" - list of digits
27 // "EMCALTRG" - list of trigger digits
28 // "AliEMCALDigitizer" - AliEMCALDigitizer with all parameters used in digitization
31 ////////////////////////////////////////////////////////////////////////////////////
33 //*-- Author: Sahal Yacoob (LBL)
34 // based on : AliEMCALDigitizer
36 // August 2002 Yves Schutz: clone PHOS as closely as possible and intoduction
37 // of new IO (a la PHOS)
38 // November 2003 Aleksei Pavlinov : adopted for Shish-Kebab geometry
39 // July 2011 GCB: Digitizer modified to accomodate embedding.
40 // Time calibration added. Decalibration possibility of energy and time added
41 //_________________________________________________________________________________
43 // --- ROOT system ---
47 #include <TBenchmark.h>
49 #include <TObjectTable.h>
54 // --- AliRoot header files ---
57 #include "AliDigitizationInput.h"
58 #include "AliRunLoader.h"
59 #include "AliCDBManager.h"
60 #include "AliCDBEntry.h"
61 #include "AliEMCALDigit.h"
63 #include "AliEMCALLoader.h"
64 #include "AliEMCALDigitizer.h"
65 #include "AliEMCALSDigitizer.h"
66 #include "AliEMCALGeometry.h"
67 #include "AliEMCALCalibData.h"
68 #include "AliEMCALSimParam.h"
69 #include "AliEMCALRawDigit.h"
70 #include "AliCaloCalibPedestal.h"
74 Double_t HeavisideTheta(Double_t x)
78 if (x > 0.) signal = 1.;
83 Double_t AnalogFastORFunction(Double_t *x, Double_t *par)
96 return (((0.8*(-((TMath::Power(C1,2)*C2*TMath::Power(TMath::E(),(-t + t0)/(C1*R1))*
97 TMath::Power(R1,2)*R2)/(C1*R1 - C2*R2)) +
98 C1*C2*R1*R2*(1 - (C2*TMath::Power(TMath::E(),(-t + t0)/(C2*R2))*R2)/(-(C1*R1) + C2*R2)))*v0*
99 HeavisideTheta(t - t0))/tr
100 - (0.8*(C1*C2*R1*R2 -
101 (TMath::Power(C1,2)*C2*TMath::Power(TMath::E(),(-1.*t + t0 + 1.25*tr)/(C1*R1))*
102 TMath::Power(R1,2)*R2)/(C1*R1 - C2*R2) +
103 (C1*TMath::Power(C2,2)*TMath::Power(TMath::E(),(-1.*t + t0 + 1.25*tr)/(C2*R2))*
104 R1*TMath::Power(R2,2))/(C1*R1 - C2*R2))*v0*
105 HeavisideTheta(t - t0 - 1.25*tr))/tr)/(C2*R1));
109 ClassImp(AliEMCALDigitizer)
112 //____________________________________________________________________________
113 AliEMCALDigitizer::AliEMCALDigitizer()
114 : AliDigitizer("",""),
119 fInputFileNames(0x0),
122 fMeanPhotonElectron(0),
123 fGainFluctuations(0),
127 fTimeResolutionPar0(0),
128 fTimeResolutionPar1(0),
131 fADCchannelECDecal(0),
133 fTimeChannelDecal(0),
135 fEventFolderName(""),
143 fDigInput = 0 ; // We work in the standalone mode
146 //____________________________________________________________________________
147 AliEMCALDigitizer::AliEMCALDigitizer(TString alirunFileName, TString eventFolderName)
148 : AliDigitizer("EMCALDigitizer", alirunFileName),
149 fDefaultInit(kFALSE),
156 fMeanPhotonElectron(0),
157 fGainFluctuations(0),
161 fTimeResolutionPar0(0),
162 fTimeResolutionPar1(0),
165 fADCchannelECDecal(0),
167 fTimeChannelDecal(0),
169 fEventFolderName(eventFolderName),
178 fDigInput = 0 ; // We work in the standalone mode
181 //____________________________________________________________________________
182 AliEMCALDigitizer::AliEMCALDigitizer(const AliEMCALDigitizer & d)
183 : AliDigitizer(d.GetName(),d.GetTitle()),
184 fDefaultInit(d.fDefaultInit),
185 fDigitsInRun(d.fDigitsInRun),
188 fInputFileNames(d.fInputFileNames),
189 fEventNames(d.fEventNames),
190 fDigitThreshold(d.fDigitThreshold),
191 fMeanPhotonElectron(d.fMeanPhotonElectron),
192 fGainFluctuations(d.fGainFluctuations),
193 fPinNoise(d.fPinNoise),
194 fTimeNoise(d.fTimeNoise),
195 fTimeDelay(d.fTimeDelay),
196 fTimeResolutionPar0(d.fTimeResolutionPar0),
197 fTimeResolutionPar1(d.fTimeResolutionPar1),
198 fADCchannelEC(d.fADCchannelEC),
199 fADCpedestalEC(d.fADCpedestalEC),
200 fADCchannelECDecal(d.fADCchannelECDecal),
201 fTimeChannel(d.fTimeChannel), fTimeChannelDecal(d.fTimeChannelDecal),
203 fEventFolderName(d.fEventFolderName),
204 fFirstEvent(d.fFirstEvent),
205 fLastEvent(d.fLastEvent),
206 fCalibData(d.fCalibData),
207 fSDigitizer(d.fSDigitizer ? new AliEMCALSDigitizer(*d.fSDigitizer) : 0)
212 //____________________________________________________________________________
213 AliEMCALDigitizer::AliEMCALDigitizer(AliDigitizationInput * rd)
214 : AliDigitizer(rd,"EMCALDigitizer"),
215 fDefaultInit(kFALSE),
222 fMeanPhotonElectron(0),
223 fGainFluctuations(0),
227 fTimeResolutionPar0(0.),
228 fTimeResolutionPar1(0.),
231 fADCchannelECDecal(0),
233 fTimeChannelDecal(0),
241 // ctor Init() is called by RunDigitizer
243 fEventFolderName = fDigInput->GetInputFolderName(0) ;
244 SetTitle(dynamic_cast<AliStream*>(fDigInput->GetInputStream(0))->GetFileName(0));
248 //____________________________________________________________________________
249 AliEMCALDigitizer::~AliEMCALDigitizer()
252 delete [] fInputFileNames ;
253 delete [] fEventNames ;
254 if (fSDigitizer) delete fSDigitizer;
257 //____________________________________________________________________________
258 void AliEMCALDigitizer::Digitize(Int_t event)
261 // Makes the digitization of the collected summable digits
262 // for this it first creates the array of all EMCAL modules
263 // filled with noise and after that adds contributions from
264 // SDigits. This design helps to avoid scanning over the
265 // list of digits to add contribution of any new SDigit.
268 // Note that SDigit energy info is stored as an amplitude, so we
269 // must call the Calibrate() method of the SDigitizer to convert it
270 // back to an energy in GeV before adding it to the Digit
272 static int nEMC=0; //max number of digits possible
273 AliRunLoader *rl = AliRunLoader::Instance();
274 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
277 Int_t readEvent = event ;
278 // fDigInput is data member from AliDigitizer
280 readEvent = dynamic_cast<AliStream*>(fDigInput->GetInputStream(0))->GetCurrentEventNumber() ;
281 AliDebug(1,Form("Adding event %d from input stream 0 %s %s",
282 readEvent, GetTitle(), fEventFolderName.Data())) ;
283 rl->GetEvent(readEvent);
285 TClonesArray * digits = emcalLoader->Digits() ;
286 digits->Delete() ; //correct way to clear array when memory is
287 //allocated by objects stored in array
290 AliEMCALGeometry *geom = 0;
291 if (!rl->GetAliRun()) {
292 AliFatal("Could not get AliRun from runLoader");
295 AliEMCAL * emcal = (AliEMCAL*)rl->GetAliRun()->GetDetector("EMCAL");
296 geom = emcal->GetGeometry();
297 nEMC = geom->GetNCells();
298 AliDebug(1,Form("nEMC %i (number cells in EMCAL) | %s \n", nEMC, geom->GetName()));
303 digits->Expand(nEMC) ;
305 // RS create a digitizer on the fly
306 if (!fSDigitizer) fSDigitizer = new AliEMCALSDigitizer(rl->GetFileName().Data());
307 fSDigitizer->SetEventRange(0, -1) ;
309 //take all the inputs to add together and load the SDigits
310 TObjArray * sdigArray = new TObjArray(fInput) ;
311 sdigArray->AddAt(emcalLoader->SDigits(), 0) ;
313 Int_t embed = kFALSE;
314 for(i = 1 ; i < fInput ; i++){
315 TString tempo(fEventNames[i]) ;
318 AliRunLoader * rl2 = AliRunLoader::GetRunLoader(tempo) ;
321 rl2 = AliRunLoader::Open(fInputFileNames[i], tempo) ;
324 readEvent = dynamic_cast<AliStream*>(fDigInput->GetInputStream(i))->GetCurrentEventNumber() ;
325 Info("Digitize", "Adding event %d from input stream %d %s %s", readEvent, i, fInputFileNames[i].Data(), tempo.Data()) ;
327 // rl2->LoadDigits();
328 rl2->GetEvent(readEvent);
329 if(rl2->GetDetectorLoader("EMCAL"))
331 AliEMCALLoader *emcalLoader2 = dynamic_cast<AliEMCALLoader*>(rl2->GetDetectorLoader("EMCAL"));
334 //Merge 2 simulated sdigits
335 if(emcalLoader2->SDigits()){
336 TClonesArray* sdigits2 = emcalLoader2->SDigits();
337 sdigArray->AddAt(sdigits2, i) ;
338 // Check if first sdigit is of embedded type, if so, handle the sdigits differently:
339 // do not smear energy of embedded, do not add noise to any sdigits
340 if(sdigits2->GetEntriesFast()>0){
341 //printf("Merged digit type: %d\n",dynamic_cast<AliEMCALDigit*> (sdigits2->At(0))->GetType());
342 AliEMCALDigit * digit2 = dynamic_cast<AliEMCALDigit*> (sdigits2->At(0));
343 if(digit2 && digit2->GetType()==AliEMCALDigit::kEmbedded){
350 else AliFatal("EMCAL Loader of second event not available!");
353 else Fatal("Digitize", "Loader of second input not found");
356 //Find the first tower with signal
357 Int_t nextSig = nEMC + 1 ;
358 TClonesArray * sdigits ;
359 for(i = 0 ; i < fInput ; i++){
360 if(i > 0 && embed) continue;
361 sdigits = dynamic_cast<TClonesArray *>(sdigArray->At(i)) ;
363 if (sdigits->GetEntriesFast() ){
364 AliEMCALDigit *sd = dynamic_cast<AliEMCALDigit *>(sdigits->At(0));
366 Int_t curNext = sd->GetId() ;
367 if(curNext < nextSig)
369 AliDebug(1,Form("input %i : #sdigits %i \n",
370 i, sdigits->GetEntriesFast()));
372 }//First entry is not NULL
374 Info("Digitize", "NULL sdigit pointer");
377 }//There is at least one entry
379 Info("Digitize", "NULL sdigits array");
382 }// SDigits array exists
384 Info("Digitizer","Null sdigit pointer");
388 AliDebug(1,Form("FIRST tower with signal %i \n", nextSig));
390 TArrayI index(fInput) ;
391 index.Reset() ; //Set all indexes to zero
393 AliEMCALDigit * digit ;
394 AliEMCALDigit * curSDigit ;
396 //Put Noise contribution, smear time and energy
397 Float_t timeResolution = 0;
398 for(absID = 0; absID < nEMC; absID++){ // Nov 30, 2006 by PAI; was from 1 to nEMC
400 if (IsDead(absID)) continue; // Don't instantiate dead digits
404 // amplitude set to zero, noise will be added later
405 Float_t noiseTime = 0.;
406 if(!embed) noiseTime = TimeOfNoise(); //No need for embedded events?
407 new((*digits)[absID]) AliEMCALDigit( -1, -1, absID, 0., noiseTime,kFALSE); // absID-1->absID
408 //look if we have to add signal?
409 digit = dynamic_cast<AliEMCALDigit *>(digits->At(absID)); // absID-1->absID
415 // Calculate time as time of the largest digit
416 Float_t time = digit->GetTime() ;
417 Float_t aTime= digit->GetAmplitude() ;
420 Int_t nInputs = fInput;
421 if(embed) nInputs = 1; // In case of embedding, merge later real digits, do not smear energy and time of data
422 for(i = 0; i< nInputs ; i++){ //loop over (possible) merge sources
423 TClonesArray* sdtclarr = dynamic_cast<TClonesArray *>(sdigArray->At(i));
425 Int_t sDigitEntries = sdtclarr->GetEntriesFast();
427 if(sDigitEntries > index[i] )
428 curSDigit = dynamic_cast<AliEMCALDigit*>(sdtclarr->At(index[i])) ;
432 //May be several digits will contribute from the same input
433 while(curSDigit && (curSDigit->GetId() == absID)){
434 //Shift primary to separate primaries belonging different inputs
435 Int_t primaryoffset ;
437 primaryoffset = fDigInput->GetMask(i) ;
440 curSDigit->ShiftPrimary(primaryoffset) ;
442 if(curSDigit->GetAmplitude()>aTime) {
443 aTime = curSDigit->GetAmplitude();
444 time = curSDigit->GetTime();
447 *digit = *digit + *curSDigit ; //adds amplitudes of each digit
451 if( sDigitEntries > index[i] )
452 curSDigit = dynamic_cast<AliEMCALDigit*>(sdtclarr->At(index[i])) ;
457 }// loop over merging sources
460 //Here we convert the summed amplitude to an energy in GeV only for simulation or mixing of simulations
461 energy = fSDigitizer->Calibrate(digit->GetAmplitude()) ; // GeV
463 // add fluctuations for photo-electron creation
464 // corrected fluctuations after comparison with beam test, Paraskevi Ganoti (06/11/2011)
465 Float_t fluct = static_cast<Float_t>((energy*fMeanPhotonElectron)/fGainFluctuations);
466 energy *= static_cast<Float_t>(gRandom->Poisson(fluct)) / fluct ;
468 //calculate and set time
469 digit->SetTime(time) ;
471 //Find next signal module
473 for(i = 0 ; i < nInputs ; i++){
474 sdigits = dynamic_cast<TClonesArray *>(sdigArray->At(i)) ;
477 Int_t curNext = nextSig ;
478 if(sdigits->GetEntriesFast() > index[i])
480 AliEMCALDigit * tmpdigit = dynamic_cast<AliEMCALDigit *>(sdigits->At(index[i]));
483 curNext = tmpdigit->GetId() ;
486 if(curNext < nextSig) nextSig = curNext ;
492 // add the noise now, no need for embedded events with real data
494 energy += gRandom->Gaus(0., fPinNoise) ;
498 //Now digitize the energy according to the fSDigitizer method,
499 //which merely converts the energy to an integer. Later we will
500 //check that the stored value matches our allowed dynamic ranges
501 digit->SetAmplitude(fSDigitizer->Digitize(energy)) ;
503 //Set time resolution with final energy
504 timeResolution = GetTimeResolution(energy);
505 digit->SetTime(gRandom->Gaus(digit->GetTime(),timeResolution) ) ;
506 AliDebug(10,Form(" absID %5i energy %f nextSig %5i\n",
507 absID, energy, nextSig));
509 digit->SetTime(digit->GetTime()+fTimeDelay) ;
511 }// Digit pointer exists
513 Info("Digitizer","Digit pointer is null");
515 } // for(absID = 0; absID < nEMC; absID++)
520 //Embed simulated amplitude (and time?) to real data digits
522 for(Int_t input = 1; input<fInput; input++){
523 TClonesArray *realDigits = dynamic_cast<TClonesArray*> (sdigArray->At(input));
525 AliDebug(1,"No sdigits to merge\n");
528 for(Int_t i2 = 0 ; i2 < realDigits->GetEntriesFast() ; i2++){
529 AliEMCALDigit * digit2 = dynamic_cast<AliEMCALDigit*>( realDigits->At(i2) ) ;
531 digit = dynamic_cast<AliEMCALDigit*>( digits->At(digit2->GetId()) ) ;
534 // Put the embedded cell energy in same units as simulated sdigits -> transform to energy units
535 // and multiply to get a big int.
536 Float_t time2 = digit2->GetTime();
537 Float_t e2 = digit2->GetAmplitude();
538 CalibrateADCTime(e2,time2,digit2->GetId());
539 Float_t amp2 = fSDigitizer->Digitize(e2);
541 Float_t e0 = digit ->GetAmplitude();
543 AliDebug(1,Form("digit 1: Abs ID %d, amp %f, type %d, time %e; digit2: Abs ID %d, amp %f, type %d, time %e\n",
544 digit ->GetId(),digit ->GetAmplitude(), digit ->GetType(), digit->GetTime(),
545 digit2->GetId(),amp2, digit2->GetType(), time2 ));
547 // Sum amplitudes, change digit amplitude
548 digit->SetAmplitude( digit->GetAmplitude() + amp2);
549 // Rough assumption, assign time of the largest of the 2 digits,
550 // data or signal to the final digit.
551 if(amp2 > digit->GetAmplitude()) digit->SetTime(time2);
552 //Mark the new digit as embedded
553 digit->SetType(AliEMCALDigit::kEmbedded);
555 if(digit2->GetAmplitude()>0.01 && e0> 0.01 )
556 AliDebug(1,Form("Embedded digit: Abs ID %d, amp %f, type %d\n",
557 digit->GetId(), digit->GetAmplitude(), digit->GetType()));
564 //JLK is it better to call Clear() here?
565 delete sdigArray ; //We should not delete its contents
567 //remove digits below thresholds
568 // until 10-02-2010 remove digits with energy smaller than fDigitThreshold 3*fPinNoise
569 // now, remove digits with Digitized ADC smaller than fDigitThreshold = 3,
570 // before merge in the same loop real data digits if available
573 for(i = 0 ; i < nEMC ; i++){
574 digit = dynamic_cast<AliEMCALDigit*>( digits->At(i) ) ;
577 //Then get the energy in GeV units.
578 energy = fSDigitizer->Calibrate(digit->GetAmplitude()) ;
579 //Then digitize using the calibration constants of the ocdb
580 Float_t ampADC = energy;
581 DigitizeEnergyTime(ampADC, time, digit->GetId()) ;
582 if(ampADC < fDigitThreshold)
583 digits->RemoveAt(i) ;
590 Int_t ndigits = digits->GetEntriesFast() ;
593 //After we have done the summing and digitizing to create the
594 //digits, now we want to calibrate the resulting amplitude to match
595 //the dynamic range of our real data.
596 for (i = 0 ; i < ndigits ; i++) {
597 digit = dynamic_cast<AliEMCALDigit *>( digits->At(i) ) ;
599 digit->SetIndexInList(i) ;
600 energy = fSDigitizer->Calibrate(digit->GetAmplitude()) ;
601 time = digit->GetTime();
602 Float_t ampADC = energy;
603 DigitizeEnergyTime(ampADC, time, digit->GetId());
604 digit->SetAmplitude(ampADC) ;
605 digit->SetTime(time);
606 // printf("digit amplitude set at end: i %d, amp %f\n",i,digit->GetAmplitude());
611 else AliFatal("EMCALLoader is NULL!") ;
615 //_____________________________________________________________________
616 void AliEMCALDigitizer::DigitizeEnergyTime(Float_t & energy, Float_t & time, const Int_t absId)
619 // Returns digitized value of the energy in a cell absId
620 // using the calibration constants stored in the OCDB
621 // or default values if no CalibData object is found.
622 // This effectively converts everything to match the dynamic range
623 // of the real data we will collect
626 const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
629 AliFatal("Did not get geometry from EMCALLoader");
639 Bool_t bCell = geom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
641 Error("DigitizeEnergyTime","Wrong cell id number : absId %i ", absId) ;
642 geom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
645 fADCpedestalEC = fCalibData->GetADCpedestal (iSupMod,ieta,iphi);
646 fADCchannelEC = fCalibData->GetADCchannel (iSupMod,ieta,iphi);
647 fADCchannelECDecal = fCalibData->GetADCchannelDecal (iSupMod,ieta,iphi);
648 fTimeChannel = fCalibData->GetTimeChannel (iSupMod,ieta,iphi,0); // Assign bunch crossing number equal to 0 (has simulation different bunch crossings?)
649 fTimeChannelDecal = fCalibData->GetTimeChannelDecal(iSupMod,ieta,iphi);
652 //Apply calibration to get ADC counts and partial decalibration as especified in OCDB
653 energy = (energy + fADCpedestalEC)/fADCchannelEC/fADCchannelECDecal ;
654 time += fTimeChannel-fTimeChannelDecal;
656 if(energy > fNADCEC )
660 //_____________________________________________________________________
661 void AliEMCALDigitizer::Decalibrate(AliEMCALDigit *digit)
664 const AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance();
667 AliFatal("Did not get geometry from EMCALLoader");
671 Int_t absId = digit->GetId();
679 Bool_t bCell = geom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
681 if (!bCell) Error("Decalibrate","Wrong cell id number : absId %i ", absId) ;
682 geom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
685 fADCchannelEC = fCalibData->GetADCchannel(iSupMod,ieta,iphi);
686 float factor = 1./(fADCchannelEC/0.0162);
688 *digit = *digit * factor;
692 //_____________________________________________________________________
693 void AliEMCALDigitizer::CalibrateADCTime(Float_t & adc, Float_t & time, const Int_t absId)
695 // Returns the energy in a cell absId with a given adc value
696 // using the calibration constants stored in the OCDB. Time also corrected from parameter in OCDB
697 // Used in case of embedding, transform ADC counts from real event into energy
698 // so that we can add the energy of the simulated sdigits which are in energy
700 // Same as in AliEMCALClusterizer::Calibrate() but here we do not reject channels being marked as hot
701 // or with time out of window
704 const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
707 AliFatal("Did not get geometry from EMCALLoader");
717 Bool_t bCell = geom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
719 Error("CalibrateADCTime","Wrong cell id number : absId %i ", absId) ;
720 geom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
723 fADCpedestalEC = fCalibData->GetADCpedestal(iSupMod,ieta,iphi);
724 fADCchannelEC = fCalibData->GetADCchannel (iSupMod,ieta,iphi);
725 fTimeChannel = fCalibData->GetTimeChannel(iSupMod,ieta,iphi,0);// Assign bunch crossing number equal to 0 (has simulation different bunch crossings?)
728 adc = adc * fADCchannelEC - fADCpedestalEC;
729 time -= fTimeChannel;
735 //____________________________________________________________________________
736 void AliEMCALDigitizer::Digitize(Option_t *option)
738 // Steering method to process digitization for events
739 // in the range from fFirstEvent to fLastEvent.
740 // This range is optionally set by SetEventRange().
741 // if fLastEvent=-1, then process events until the end.
742 // by default fLastEvent = fFirstEvent (process only one event)
744 if (!fInit) { // to prevent overwrite existing file
745 Error( "Digitize", "Give a version name different from %s", fEventFolderName.Data() ) ;
749 if (strstr(option,"print")) {
755 if(strstr(option,"tim"))
756 gBenchmark->Start("EMCALDigitizer");
758 AliRunLoader *rl = AliRunLoader::Instance();
759 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
762 AliFatal("Did not get the Loader");
766 if (fLastEvent == -1) {
767 fLastEvent = rl->GetNumberOfEvents() - 1 ;
770 fLastEvent = fFirstEvent ; // what is this ??
772 nEvents = fLastEvent - fFirstEvent + 1;
775 TClonesArray* digitsTMP = new TClonesArray("AliEMCALDigit", 32*96);
776 TClonesArray* digitsTRG = new TClonesArray("AliEMCALRawDigit", 32*96);
778 rl->LoadSDigits("EMCAL");
779 for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
781 rl->GetEvent(ievent);
783 Digitize(ievent) ; //Add prepared SDigits to digits and add the noise
788 //-------------------------------------
791 Digits2FastOR(digitsTMP, digitsTRG);
793 WriteDigits(digitsTRG);
795 (emcalLoader->TreeD())->Fill();
797 emcalLoader->WriteDigits( "OVERWRITE");
801 digitsTRG ->Delete();
802 digitsTMP ->Delete();
804 //-------------------------------------
806 if(strstr(option,"deb"))
808 if(strstr(option,"table")) gObjectTable->Print();
810 //increment the total number of Digits per run
811 fDigitsInRun += emcalLoader->Digits()->GetEntriesFast() ;
816 if(strstr(option,"tim")){
817 gBenchmark->Stop("EMCALDigitizer");
818 Float_t cputime = gBenchmark->GetCpuTime("EMCALDigitizer");
819 Float_t avcputime = cputime;
820 if(nEvents==0) avcputime = 0 ;
821 AliInfo(Form("Digitize: took %f seconds for Digitizing %f seconds per event", cputime, avcputime)) ;
825 //__________________________________________________________________
826 Float_t AliEMCALDigitizer::GetTimeResolution(Float_t energy) const
831 res = TMath::Sqrt(fTimeResolutionPar0 +
832 fTimeResolutionPar1/(energy*energy) );
834 // parametrization above is for ns. Convert to seconds:
838 //____________________________________________________________________________
839 void AliEMCALDigitizer::Digits2FastOR(TClonesArray* digitsTMP, TClonesArray* digitsTRG)
841 // FEE digits afterburner to produce TRG digits
842 // we are only interested in the FEE digit deposited energy
843 // to be converted later into a voltage value
845 // push the FEE digit to its associated FastOR (numbered from 0:95)
846 // TRU is in charge of summing module digits
848 AliRunLoader *runLoader = AliRunLoader::Instance();
850 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(runLoader->GetDetectorLoader("EMCAL"));
851 if (!emcalLoader) AliFatal("Did not get the Loader");
853 const AliEMCALGeometry* geom = AliEMCALGeometry::GetInstance();
855 // build FOR from simulated digits
856 // and xfer to the corresponding TRU input (mapping)
858 TClonesArray* sdigits = emcalLoader->SDigits();
860 TClonesArray *digits = (TClonesArray*)sdigits->Clone();
862 AliDebug(999,Form("=== %d SDigits to trigger digits ===",digits->GetEntriesFast()));
864 TIter NextDigit(digits);
865 while (AliEMCALDigit* digit = (AliEMCALDigit*)NextDigit())
867 if (IsDead(digit)) continue;
871 Int_t id = digit->GetId();
874 if (geom && geom->GetFastORIndexFromCellIndex(id , trgid))
876 AliDebug(1,Form("trigger digit id: %d from cell id: %d\n",trgid,id));
878 AliEMCALDigit* d = static_cast<AliEMCALDigit*>(digitsTMP->At(trgid));
882 new((*digitsTMP)[trgid]) AliEMCALDigit(*digit);
883 d = (AliEMCALDigit*)digitsTMP->At(trgid);
893 if (AliDebugLevel()) printf("Number of TRG digits: %d\n",digitsTMP->GetEntriesFast());
896 Int_t *timeSamples = new Int_t[nSamples];
898 NextDigit = TIter(digitsTMP);
899 while (AliEMCALDigit* digit = (AliEMCALDigit*)NextDigit())
903 Int_t id = digit->GetId();
904 Float_t time = 50.e-9;
906 Double_t depositedEnergy = 0.;
907 for (Int_t j = 1; j <= digit->GetNprimary(); j++) depositedEnergy += digit->GetDEPrimary(j);
909 if (AliDebugLevel()) printf("Deposited Energy: %f\n", depositedEnergy);
911 // FIXME: Check digit time!
914 depositedEnergy += gRandom->Gaus(0., .08);
916 DigitalFastOR(time, depositedEnergy, timeSamples, nSamples);
918 for (Int_t j=0;j<nSamples;j++)
920 timeSamples[j] = ((j << 12) & 0xFF000) | (timeSamples[j] & 0xFFF);
923 new((*digitsTRG)[digitsTRG->GetEntriesFast()]) AliEMCALRawDigit(id, timeSamples, nSamples);
925 if (AliDebugLevel()) ((AliEMCALRawDigit*)digitsTRG->At(digitsTRG->GetEntriesFast() - 1))->Print("");
930 delete [] timeSamples;
932 if (digits && digits->GetEntriesFast()) digits->Delete();
935 //____________________________________________________________________________
936 void AliEMCALDigitizer::DigitalFastOR( Double_t time, Double_t dE, Int_t timeSamples[], Int_t nSamples )
940 const Int_t reso = 11; // 11-bit resolution ADC
941 const Double_t vFSR = 1; // Full scale input voltage range
942 // const Double_t dNe = 125; // signal of the APD per MeV of energy deposit in a tower: 125 photo-e-/MeV @ M=30
943 const Double_t dNe = 125/1.3; // F-ALTRO max V. FEE: factor 4
944 const Double_t vA = .136e-6; // CSP output range: 0.136uV/e-
945 const Double_t rise = 50e-9; // rise time (10-90%) of the FastOR signal before shaping
947 const Double_t kTimeBinWidth = 25E-9; // sampling frequency (40MHz)
949 Double_t vV = 1000. * dE * dNe * vA; // GeV 2 MeV
951 TF1 signalF("signal", AnalogFastORFunction, 0, nSamples * kTimeBinWidth, 3);
952 signalF.SetParameter( 0, vV );
953 signalF.SetParameter( 1, time ); // FIXME: when does the signal arrive? Might account for cable lengths
954 signalF.SetParameter( 2, rise );
956 for (Int_t iTime=0; iTime<nSamples; iTime++)
958 // FIXME: add noise (probably not simply Gaussian) according to DA measurements
959 // probably plan an access to OCDB
961 timeSamples[iTime] = int((TMath::Power(2, reso) / vFSR) * signalF.Eval(iTime * kTimeBinWidth) + 0.5);
965 //____________________________________________________________________________
966 Bool_t AliEMCALDigitizer::Init()
968 // Makes all memory allocations
970 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
972 if ( emcalLoader == 0 ) {
973 Fatal("Init", "Could not obtain the AliEMCALLoader");
978 fLastEvent = fFirstEvent ;
981 fInput = fDigInput->GetNinputs() ;
985 fInputFileNames = new TString[fInput] ;
986 fEventNames = new TString[fInput] ;
987 fInputFileNames[0] = GetTitle() ;
988 fEventNames[0] = fEventFolderName.Data() ;
990 for (index = 1 ; index < fInput ; index++) {
991 fInputFileNames[index] = dynamic_cast<AliStream*>(fDigInput->GetInputStream(index))->GetFileName(0);
992 TString tempo = fDigInput->GetInputFolderName(index) ;
993 fEventNames[index] = tempo.Remove(tempo.Length()-1) ; // strip of the stream number added bt fDigInput
996 //Calibration instance
997 fCalibData = emcalLoader->CalibData();
1001 //____________________________________________________________________________
1002 void AliEMCALDigitizer::InitParameters()
1004 // Parameter initialization for digitizer
1006 // Get the parameters from the OCDB via the loader
1007 AliRunLoader *rl = AliRunLoader::Instance();
1008 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
1009 AliEMCALSimParam * simParam = 0x0;
1010 if(emcalLoader) simParam = emcalLoader->SimulationParameters();
1013 simParam = AliEMCALSimParam::GetInstance();
1014 AliWarning("Simulation Parameters not available in OCDB?");
1017 fMeanPhotonElectron = simParam->GetMeanPhotonElectron() ; // 4400; // electrons per GeV
1018 fGainFluctuations = simParam->GetGainFluctuations() ; // 15.0;
1020 fPinNoise = simParam->GetPinNoise();//0.012; // pin noise in GeV from analysis test beam data
1021 if (fPinNoise < 0.0001 )
1022 Warning("InitParameters", "No noise added\n") ;
1023 fTimeNoise = simParam->GetTimeNoise(); // 1.28E-5 s
1024 fDigitThreshold = simParam->GetDigitThreshold(); //fPinNoise * 3; // 3 * sigma
1025 fTimeResolutionPar0 = simParam->GetTimeResolutionPar0();
1026 fTimeResolutionPar1 = simParam->GetTimeResolutionPar1();
1027 fTimeDelay = simParam->GetTimeDelay(); //600e-9 ; // 600 ns
1029 // These defaults are normally not used.
1030 // Values are read from calibration database instead
1031 fADCchannelEC = 0.0153; // Update 24 Apr 2007: 250./16/1024 - width of one ADC channel in GeV
1032 fADCpedestalEC = 0.0 ; // GeV
1033 fADCchannelECDecal = 1.0; // No decalibration by default
1034 fTimeChannel = 0.0; // No time calibration by default
1035 fTimeChannelDecal = 0.0; // No time decalibration by default
1037 fNADCEC = simParam->GetNADCEC();//(Int_t) TMath::Power(2,16) ; // number of channels in Tower ADC - 65536
1039 AliDebug(2,Form("Mean Photon Electron %d, Gain Fluct. %2.1f; Noise: APD %f, Time %f; Digit Threshold %d,Time Resolution Par0 %g Par1 %g,NADCEC %d",
1040 fMeanPhotonElectron, fGainFluctuations, fPinNoise,fTimeNoise, fDigitThreshold,fTimeResolutionPar0,fTimeResolutionPar1,fNADCEC));
1044 //__________________________________________________________________
1045 void AliEMCALDigitizer::Print1(Option_t * option)
1046 { // 19-nov-04 - just for convenience
1048 PrintDigits(option);
1051 //__________________________________________________________________
1052 void AliEMCALDigitizer::Print (Option_t * ) const
1054 // Print Digitizer's parameters
1055 printf("Print: \n------------------- %s -------------", GetName() ) ;
1056 if( strcmp(fEventFolderName.Data(), "") != 0 ){
1057 printf(" Writing Digits to branch with title %s\n", fEventFolderName.Data()) ;
1061 nStreams = GetNInputStreams() ;
1068 for (index = 0 ; index < nStreams ; index++) {
1069 TString tempo(fEventNames[index]) ;
1071 if ((rl = AliRunLoader::GetRunLoader(tempo)) == 0)
1072 rl = AliRunLoader::Open(fInputFileNames[index], tempo) ;
1073 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
1075 TString fileName( emcalLoader->GetSDigitsFileName() ) ;
1076 if ( fEventNames[index] != AliConfig::GetDefaultEventFolderName()) // only if not the default folder name
1077 fileName = fileName.ReplaceAll(".root", "") + "_" + fEventNames[index] + ".root" ;
1078 printf ("Adding SDigits from %s %s\n", fInputFileNames[index].Data(), fileName.Data()) ;
1082 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1084 if(emcalLoader) printf("\nWriting digits to %s", emcalLoader->GetDigitsFileName().Data()) ;
1085 else printf("\nNULL LOADER");
1087 printf("\nWith following parameters:\n") ;
1088 printf(" Electronics noise in EMC, APD (fPinNoise) = %f, Time = %f \n", fPinNoise, fTimeNoise) ;
1089 printf(" Threshold in Tower (fDigitThreshold) = %d\n", fDigitThreshold) ;
1090 printf("---------------------------------------------------\n") ;
1093 printf("Print: AliEMCALDigitizer not initialized") ;
1096 //__________________________________________________________________
1097 void AliEMCALDigitizer::PrintDigits(Option_t * option)
1099 //utility method for printing digit information
1101 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1103 TClonesArray * digits = emcalLoader->Digits() ;
1104 TClonesArray * sdigits = emcalLoader->SDigits() ;
1106 printf("\n #Digits: %d : sdigits %d ", digits->GetEntriesFast(), sdigits->GetEntriesFast()) ;
1107 printf("\n event %d", emcalLoader->GetRunLoader()->GetEventNumber());
1109 if(strstr(option,"all")){
1111 AliEMCALDigit * digit;
1112 printf("\nEMC digits (with primaries):\n") ;
1113 printf("\n Id Amplitude Time Index Nprim: Primaries list \n") ;
1115 for (index = 0 ; index < digits->GetEntries() ; index++) {
1116 digit = dynamic_cast<AliEMCALDigit *>(digits->At(index)) ;
1118 printf("\n%6d %8f %6.5e %4d %2d : ",
1119 digit->GetId(), digit->GetAmplitude(), digit->GetTime(), digit->GetIndexInList(), digit->GetNprimary()) ;
1121 for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++) {
1122 printf("%d ",digit->GetPrimary(iprimary+1) ) ;
1129 else printf("NULL LOADER, cannot print\n");
1132 //__________________________________________________________________
1133 Float_t AliEMCALDigitizer::TimeOfNoise(void)
1135 // Calculates the time signal generated by noise
1136 //printf("Time noise %e\n",fTimeNoise);
1137 return gRandom->Rndm() * fTimeNoise;
1140 //__________________________________________________________________
1141 void AliEMCALDigitizer::Unload()
1143 // Unloads the SDigits and Digits
1147 for(i = 1 ; i < fInput ; i++){
1148 TString tempo(fEventNames[i]) ;
1150 if ((rl = AliRunLoader::GetRunLoader(tempo)))
1151 rl->GetDetectorLoader("EMCAL")->UnloadSDigits() ;
1153 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1154 if(emcalLoader)emcalLoader->UnloadDigits() ;
1155 else AliFatal("Did not get the loader");
1158 //_________________________________________________________________________________________
1159 void AliEMCALDigitizer::WriteDigits()
1160 { // Makes TreeD in the output file.
1161 // Check if branch already exists:
1162 // if yes, exit without writing: ROOT TTree does not support overwriting/updating of
1163 // already existing branches.
1164 // else creates branch with Digits, named "EMCAL", title "...",
1165 // and branch "AliEMCALDigitizer", with the same title to keep all the parameters
1166 // and names of files, from which digits are made.
1168 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1171 const TClonesArray * digits = emcalLoader->Digits() ;
1172 TTree * treeD = emcalLoader->TreeD();
1174 emcalLoader->MakeDigitsContainer();
1175 treeD = emcalLoader->TreeD();
1178 // -- create Digits branch
1179 Int_t bufferSize = 32000 ;
1180 TBranch * digitsBranch = 0;
1181 if ((digitsBranch = treeD->GetBranch("EMCAL"))) {
1182 digitsBranch->SetAddress(&digits);
1183 AliWarning("Digits Branch already exists. Not all digits will be visible");
1186 treeD->Branch("EMCAL","TClonesArray",&digits,bufferSize);
1187 //digitsBranch->SetTitle(fEventFolderName);
1191 emcalLoader->WriteDigits("OVERWRITE");
1192 emcalLoader->WriteDigitizer("OVERWRITE");
1198 else AliFatal("Loader not available");
1201 //__________________________________________________________________
1202 void AliEMCALDigitizer::WriteDigits(TClonesArray* digits, const char* branchName)
1203 { // overloaded method
1204 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1207 TTree* treeD = emcalLoader->TreeD();
1210 emcalLoader->MakeDigitsContainer();
1211 treeD = emcalLoader->TreeD();
1214 // -- create Digits branch
1215 Int_t bufferSize = 32000;
1217 if (TBranch* triggerBranch = treeD->GetBranch(branchName))
1219 triggerBranch->SetAddress(&digits);
1223 treeD->Branch(branchName,"TClonesArray",&digits,bufferSize);
1228 else AliFatal("Loader not available");
1231 //__________________________________________________________________
1232 Bool_t AliEMCALDigitizer::IsDead(AliEMCALDigit *digit)
1234 AliRunLoader *runLoader = AliRunLoader::Instance();
1235 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(runLoader->GetDetectorLoader("EMCAL"));
1236 if (!emcalLoader) AliFatal("Did not get the Loader");
1238 AliCaloCalibPedestal *caloPed = emcalLoader->PedestalData();
1240 AliWarning("Could not access pedestal data! No dead channel removal applied");
1245 const AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance();
1246 if (!geom) AliFatal("Did not get geometry from EMCALLoader");
1248 Int_t absId = digit->GetId();
1256 Bool_t bCell = geom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
1258 if (!bCell) Error("IsDead","Wrong cell id number : absId %i ", absId) ;
1259 geom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
1261 Int_t channelStatus = (Int_t)(caloPed->GetDeadMap(iSupMod))->GetBinContent(ieta,iphi);
1263 if (channelStatus == AliCaloCalibPedestal::kDead)
1270 //__________________________________________________________________
1271 Bool_t AliEMCALDigitizer::IsDead(Int_t absId)
1273 AliRunLoader *runLoader = AliRunLoader::Instance();
1274 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(runLoader->GetDetectorLoader("EMCAL"));
1275 if (!emcalLoader) AliFatal("Did not get the Loader");
1277 AliCaloCalibPedestal *caloPed = emcalLoader->PedestalData();
1279 AliWarning("Could not access pedestal data! No dead channel removal applied");
1284 const AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance();
1285 if (!geom) AliFatal("Did not get geometry from EMCALLoader");
1294 Bool_t bCell = geom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
1296 if (!bCell) Error("IsDead","Wrong cell id number : absId %i ", absId) ;
1297 geom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
1299 Int_t channelStatus = (Int_t)(caloPed->GetDeadMap(iSupMod))->GetBinContent(ieta,iphi);
1301 if (channelStatus == AliCaloCalibPedestal::kDead)