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 *
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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"
73 Double_t HeavisideTheta(Double_t x)
77 if (x > 0.) signal = 1.;
82 Double_t AnalogFastORFunction(Double_t *x, Double_t *par)
95 return (((0.8*(-((TMath::Power(C1,2)*C2*TMath::Power(TMath::E(),(-t + t0)/(C1*R1))*
96 TMath::Power(R1,2)*R2)/(C1*R1 - C2*R2)) +
97 C1*C2*R1*R2*(1 - (C2*TMath::Power(TMath::E(),(-t + t0)/(C2*R2))*R2)/(-(C1*R1) + C2*R2)))*v0*
98 HeavisideTheta(t - t0))/tr
100 (TMath::Power(C1,2)*C2*TMath::Power(TMath::E(),(-1.*t + t0 + 1.25*tr)/(C1*R1))*
101 TMath::Power(R1,2)*R2)/(C1*R1 - C2*R2) +
102 (C1*TMath::Power(C2,2)*TMath::Power(TMath::E(),(-1.*t + t0 + 1.25*tr)/(C2*R2))*
103 R1*TMath::Power(R2,2))/(C1*R1 - C2*R2))*v0*
104 HeavisideTheta(t - t0 - 1.25*tr))/tr)/(C2*R1));
108 ClassImp(AliEMCALDigitizer)
111 //____________________________________________________________________________
112 AliEMCALDigitizer::AliEMCALDigitizer()
113 : AliDigitizer("",""),
118 fInputFileNames(0x0),
121 fMeanPhotonElectron(0),
122 fGainFluctuations(0),
126 fTimeResolutionPar0(0),
127 fTimeResolutionPar1(0),
130 fADCchannelECDecal(0),
132 fTimeChannelDecal(0),
134 fEventFolderName(""),
142 fDigInput = 0 ; // We work in the standalone mode
145 //____________________________________________________________________________
146 AliEMCALDigitizer::AliEMCALDigitizer(TString alirunFileName, TString eventFolderName)
147 : AliDigitizer("EMCALDigitizer", alirunFileName),
148 fDefaultInit(kFALSE),
155 fMeanPhotonElectron(0),
156 fGainFluctuations(0),
160 fTimeResolutionPar0(0),
161 fTimeResolutionPar1(0),
164 fADCchannelECDecal(0),
166 fTimeChannelDecal(0),
168 fEventFolderName(eventFolderName),
177 fDigInput = 0 ; // We work in the standalone mode
180 //____________________________________________________________________________
181 AliEMCALDigitizer::AliEMCALDigitizer(const AliEMCALDigitizer & d)
182 : AliDigitizer(d.GetName(),d.GetTitle()),
183 fDefaultInit(d.fDefaultInit),
184 fDigitsInRun(d.fDigitsInRun),
187 fInputFileNames(d.fInputFileNames),
188 fEventNames(d.fEventNames),
189 fDigitThreshold(d.fDigitThreshold),
190 fMeanPhotonElectron(d.fMeanPhotonElectron),
191 fGainFluctuations(d.fGainFluctuations),
192 fPinNoise(d.fPinNoise),
193 fTimeNoise(d.fTimeNoise),
194 fTimeDelay(d.fTimeDelay),
195 fTimeResolutionPar0(d.fTimeResolutionPar0),
196 fTimeResolutionPar1(d.fTimeResolutionPar1),
197 fADCchannelEC(d.fADCchannelEC),
198 fADCpedestalEC(d.fADCpedestalEC),
199 fADCchannelECDecal(d.fADCchannelECDecal),
200 fTimeChannel(d.fTimeChannel), fTimeChannelDecal(d.fTimeChannelDecal),
202 fEventFolderName(d.fEventFolderName),
203 fFirstEvent(d.fFirstEvent),
204 fLastEvent(d.fLastEvent),
205 fCalibData(d.fCalibData),
206 fSDigitizer(d.fSDigitizer ? new AliEMCALSDigitizer(*d.fSDigitizer) : 0)
211 //____________________________________________________________________________
212 AliEMCALDigitizer::AliEMCALDigitizer(AliDigitizationInput * rd)
213 : AliDigitizer(rd,"EMCALDigitizer"),
214 fDefaultInit(kFALSE),
221 fMeanPhotonElectron(0),
222 fGainFluctuations(0),
226 fTimeResolutionPar0(0.),
227 fTimeResolutionPar1(0.),
230 fADCchannelECDecal(0),
232 fTimeChannelDecal(0),
240 // ctor Init() is called by RunDigitizer
242 fEventFolderName = fDigInput->GetInputFolderName(0) ;
243 SetTitle(dynamic_cast<AliStream*>(fDigInput->GetInputStream(0))->GetFileName(0));
247 //____________________________________________________________________________
248 AliEMCALDigitizer::~AliEMCALDigitizer()
251 delete [] fInputFileNames ;
252 delete [] fEventNames ;
253 if (fSDigitizer) delete fSDigitizer;
256 //____________________________________________________________________________
257 void AliEMCALDigitizer::Digitize(Int_t event)
260 // Makes the digitization of the collected summable digits
261 // for this it first creates the array of all EMCAL modules
262 // filled with noise and after that adds contributions from
263 // SDigits. This design helps to avoid scanning over the
264 // list of digits to add contribution of any new SDigit.
267 // Note that SDigit energy info is stored as an amplitude, so we
268 // must call the Calibrate() method of the SDigitizer to convert it
269 // back to an energy in GeV before adding it to the Digit
271 static int nEMC=0; //max number of digits possible
272 AliRunLoader *rl = AliRunLoader::Instance();
273 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
276 Int_t readEvent = event ;
277 // fDigInput is data member from AliDigitizer
279 readEvent = dynamic_cast<AliStream*>(fDigInput->GetInputStream(0))->GetCurrentEventNumber() ;
280 AliDebug(1,Form("Adding event %d from input stream 0 %s %s",
281 readEvent, GetTitle(), fEventFolderName.Data())) ;
282 rl->GetEvent(readEvent);
284 TClonesArray * digits = emcalLoader->Digits() ;
285 digits->Delete() ; //correct way to clear array when memory is
286 //allocated by objects stored in array
289 AliEMCALGeometry *geom = 0;
290 if (!rl->GetAliRun()) {
291 AliFatal("Could not get AliRun from runLoader");
294 AliEMCAL * emcal = (AliEMCAL*)rl->GetAliRun()->GetDetector("EMCAL");
295 geom = emcal->GetGeometry();
296 nEMC = geom->GetNCells();
297 AliDebug(1,Form("nEMC %i (number cells in EMCAL) | %s \n", nEMC, geom->GetName()));
302 digits->Expand(nEMC) ;
304 // RS create a digitizer on the fly
305 if (!fSDigitizer) fSDigitizer = new AliEMCALSDigitizer(rl->GetFileName().Data());
306 fSDigitizer->SetEventRange(0, -1) ;
308 //take all the inputs to add together and load the SDigits
309 TObjArray * sdigArray = new TObjArray(fInput) ;
310 sdigArray->AddAt(emcalLoader->SDigits(), 0) ;
312 Int_t embed = kFALSE;
313 for(i = 1 ; i < fInput ; i++){
314 TString tempo(fEventNames[i]) ;
317 AliRunLoader * rl2 = AliRunLoader::GetRunLoader(tempo) ;
320 rl2 = AliRunLoader::Open(fInputFileNames[i], tempo) ;
323 readEvent = dynamic_cast<AliStream*>(fDigInput->GetInputStream(i))->GetCurrentEventNumber() ;
324 Info("Digitize", "Adding event %d from input stream %d %s %s", readEvent, i, fInputFileNames[i].Data(), tempo.Data()) ;
326 // rl2->LoadDigits();
327 rl2->GetEvent(readEvent);
328 if(rl2->GetDetectorLoader("EMCAL"))
330 AliEMCALLoader *emcalLoader2 = dynamic_cast<AliEMCALLoader*>(rl2->GetDetectorLoader("EMCAL"));
333 //Merge 2 simulated sdigits
334 if(emcalLoader2->SDigits()){
335 TClonesArray* sdigits2 = emcalLoader2->SDigits();
336 sdigArray->AddAt(sdigits2, i) ;
337 // Check if first sdigit is of embedded type, if so, handle the sdigits differently:
338 // do not smear energy of embedded, do not add noise to any sdigits
339 if(sdigits2->GetEntriesFast()>0){
340 //printf("Merged digit type: %d\n",dynamic_cast<AliEMCALDigit*> (sdigits2->At(0))->GetType());
341 AliEMCALDigit * digit2 = dynamic_cast<AliEMCALDigit*> (sdigits2->At(0));
342 if(digit2 && digit2->GetType()==AliEMCALDigit::kEmbedded){
349 else AliFatal("EMCAL Loader of second event not available!");
352 else Fatal("Digitize", "Loader of second input not found");
355 //Find the first tower with signal
356 Int_t nextSig = nEMC + 1 ;
357 TClonesArray * sdigits ;
358 for(i = 0 ; i < fInput ; i++){
359 if(i > 0 && embed) continue;
360 sdigits = dynamic_cast<TClonesArray *>(sdigArray->At(i)) ;
362 if (sdigits->GetEntriesFast() ){
363 AliEMCALDigit *sd = dynamic_cast<AliEMCALDigit *>(sdigits->At(0));
365 Int_t curNext = sd->GetId() ;
366 if(curNext < nextSig)
368 AliDebug(1,Form("input %i : #sdigits %i \n",
369 i, sdigits->GetEntriesFast()));
371 }//First entry is not NULL
373 Info("Digitize", "NULL sdigit pointer");
376 }//There is at least one entry
378 Info("Digitize", "NULL sdigits array");
381 }// SDigits array exists
383 Info("Digitizer","Null sdigit pointer");
387 AliDebug(1,Form("FIRST tower with signal %i \n", nextSig));
389 TArrayI index(fInput) ;
390 index.Reset() ; //Set all indexes to zero
392 AliEMCALDigit * digit ;
393 AliEMCALDigit * curSDigit ;
395 //Put Noise contribution, smear time and energy
396 Float_t timeResolution = 0;
397 for(absID = 0; absID < nEMC; absID++){ // Nov 30, 2006 by PAI; was from 1 to nEMC
400 // amplitude set to zero, noise will be added later
401 Float_t noiseTime = 0.;
402 if(!embed) noiseTime = TimeOfNoise(); //No need for embedded events?
403 new((*digits)[absID]) AliEMCALDigit( -1, -1, absID, 0., noiseTime,kFALSE); // absID-1->absID
404 //look if we have to add signal?
405 digit = dynamic_cast<AliEMCALDigit *>(digits->At(absID)); // absID-1->absID
411 // Calculate time as time of the largest digit
412 Float_t time = digit->GetTime() ;
413 Float_t aTime= digit->GetAmplitude() ;
416 Int_t nInputs = fInput;
417 if(embed) nInputs = 1; // In case of embedding, merge later real digits, do not smear energy and time of data
418 for(i = 0; i< nInputs ; i++){ //loop over (possible) merge sources
419 TClonesArray* sdtclarr = dynamic_cast<TClonesArray *>(sdigArray->At(i));
421 Int_t sDigitEntries = sdtclarr->GetEntriesFast();
423 if(sDigitEntries > index[i] )
424 curSDigit = dynamic_cast<AliEMCALDigit*>(sdtclarr->At(index[i])) ;
428 //May be several digits will contribute from the same input
429 while(curSDigit && (curSDigit->GetId() == absID)){
430 //Shift primary to separate primaries belonging different inputs
431 Int_t primaryoffset ;
433 primaryoffset = fDigInput->GetMask(i) ;
436 curSDigit->ShiftPrimary(primaryoffset) ;
438 if(curSDigit->GetAmplitude()>aTime) {
439 aTime = curSDigit->GetAmplitude();
440 time = curSDigit->GetTime();
443 *digit = *digit + *curSDigit ; //adds amplitudes of each digit
447 if( sDigitEntries > index[i] )
448 curSDigit = dynamic_cast<AliEMCALDigit*>(sdtclarr->At(index[i])) ;
453 }// loop over merging sources
456 //Here we convert the summed amplitude to an energy in GeV only for simulation or mixing of simulations
457 energy = fSDigitizer->Calibrate(digit->GetAmplitude()) ; // GeV
459 // add fluctuations for photo-electron creation
460 // corrected fluctuations after comparison with beam test, Paraskevi Ganoti (06/11/2011)
461 Float_t fluct = static_cast<Float_t>((energy*fMeanPhotonElectron)/fGainFluctuations);
462 energy *= static_cast<Float_t>(gRandom->Poisson(fluct)) / fluct ;
464 //calculate and set time
465 digit->SetTime(time) ;
467 //Find next signal module
469 for(i = 0 ; i < nInputs ; i++){
470 sdigits = dynamic_cast<TClonesArray *>(sdigArray->At(i)) ;
473 Int_t curNext = nextSig ;
474 if(sdigits->GetEntriesFast() > index[i])
476 AliEMCALDigit * tmpdigit = dynamic_cast<AliEMCALDigit *>(sdigits->At(index[i]));
479 curNext = tmpdigit->GetId() ;
482 if(curNext < nextSig) nextSig = curNext ;
488 // add the noise now, no need for embedded events with real data
490 energy += gRandom->Gaus(0., fPinNoise) ;
494 //Now digitize the energy according to the fSDigitizer method,
495 //which merely converts the energy to an integer. Later we will
496 //check that the stored value matches our allowed dynamic ranges
497 digit->SetAmplitude(fSDigitizer->Digitize(energy)) ;
499 //Set time resolution with final energy
500 timeResolution = GetTimeResolution(energy);
501 digit->SetTime(gRandom->Gaus(digit->GetTime(),timeResolution) ) ;
502 AliDebug(10,Form(" absID %5i energy %f nextSig %5i\n",
503 absID, energy, nextSig));
505 digit->SetTime(digit->GetTime()+fTimeDelay) ;
507 }// Digit pointer exists
509 Info("Digitizer","Digit pointer is null");
511 } // for(absID = 0; absID < nEMC; absID++)
516 //Embed simulated amplitude (and time?) to real data digits
518 for(Int_t input = 1; input<fInput; input++){
519 TClonesArray *realDigits = dynamic_cast<TClonesArray*> (sdigArray->At(input));
521 AliDebug(1,"No sdigits to merge\n");
524 for(Int_t i2 = 0 ; i2 < realDigits->GetEntriesFast() ; i2++){
525 AliEMCALDigit * digit2 = dynamic_cast<AliEMCALDigit*>( realDigits->At(i2) ) ;
527 digit = dynamic_cast<AliEMCALDigit*>( digits->At(digit2->GetId()) ) ;
530 // Put the embedded cell energy in same units as simulated sdigits -> transform to energy units
531 // and multiply to get a big int.
532 Float_t time2 = digit2->GetTime();
533 Float_t e2 = digit2->GetAmplitude();
534 CalibrateADCTime(e2,time2,digit2->GetId());
535 Float_t amp2 = fSDigitizer->Digitize(e2);
537 Float_t e0 = digit ->GetAmplitude();
539 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",
540 digit ->GetId(),digit ->GetAmplitude(), digit ->GetType(), digit->GetTime(),
541 digit2->GetId(),amp2, digit2->GetType(), time2 ));
543 // Sum amplitudes, change digit amplitude
544 digit->SetAmplitude( digit->GetAmplitude() + amp2);
545 // Rough assumption, assign time of the largest of the 2 digits,
546 // data or signal to the final digit.
547 if(amp2 > digit->GetAmplitude()) digit->SetTime(time2);
548 //Mark the new digit as embedded
549 digit->SetType(AliEMCALDigit::kEmbedded);
551 if(digit2->GetAmplitude()>0.01 && e0> 0.01 )
552 AliDebug(1,Form("Embedded digit: Abs ID %d, amp %f, type %d\n",
553 digit->GetId(), digit->GetAmplitude(), digit->GetType()));
560 //JLK is it better to call Clear() here?
561 delete sdigArray ; //We should not delete its contents
563 //remove digits below thresholds
564 // until 10-02-2010 remove digits with energy smaller than fDigitThreshold 3*fPinNoise
565 // now, remove digits with Digitized ADC smaller than fDigitThreshold = 3,
566 // before merge in the same loop real data digits if available
569 for(i = 0 ; i < nEMC ; i++){
570 digit = dynamic_cast<AliEMCALDigit*>( digits->At(i) ) ;
573 //Then get the energy in GeV units.
574 energy = fSDigitizer->Calibrate(digit->GetAmplitude()) ;
575 //Then digitize using the calibration constants of the ocdb
576 Float_t ampADC = energy;
577 DigitizeEnergyTime(ampADC, time, digit->GetId()) ;
578 if(ampADC < fDigitThreshold)
579 digits->RemoveAt(i) ;
586 Int_t ndigits = digits->GetEntriesFast() ;
589 //After we have done the summing and digitizing to create the
590 //digits, now we want to calibrate the resulting amplitude to match
591 //the dynamic range of our real data.
592 for (i = 0 ; i < ndigits ; i++) {
593 digit = dynamic_cast<AliEMCALDigit *>( digits->At(i) ) ;
595 digit->SetIndexInList(i) ;
596 energy = fSDigitizer->Calibrate(digit->GetAmplitude()) ;
597 time = digit->GetTime();
598 Float_t ampADC = energy;
599 DigitizeEnergyTime(ampADC, time, digit->GetId());
600 digit->SetAmplitude(ampADC) ;
601 digit->SetTime(time);
602 // printf("digit amplitude set at end: i %d, amp %f\n",i,digit->GetAmplitude());
607 else AliFatal("EMCALLoader is NULL!") ;
611 //_____________________________________________________________________
612 void AliEMCALDigitizer::DigitizeEnergyTime(Float_t & energy, Float_t & time, const Int_t absId)
615 // Returns digitized value of the energy in a cell absId
616 // using the calibration constants stored in the OCDB
617 // or default values if no CalibData object is found.
618 // This effectively converts everything to match the dynamic range
619 // of the real data we will collect
622 const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
625 AliFatal("Did not get geometry from EMCALLoader");
635 Bool_t bCell = geom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
637 Error("DigitizeEnergyTime","Wrong cell id number : absId %i ", absId) ;
638 geom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
641 fADCpedestalEC = fCalibData->GetADCpedestal (iSupMod,ieta,iphi);
642 fADCchannelEC = fCalibData->GetADCchannel (iSupMod,ieta,iphi);
643 fADCchannelECDecal = fCalibData->GetADCchannelDecal (iSupMod,ieta,iphi);
644 fTimeChannel = fCalibData->GetTimeChannel (iSupMod,ieta,iphi,0); // Assign bunch crossing number equal to 0 (has simulation different bunch crossings?)
645 fTimeChannelDecal = fCalibData->GetTimeChannelDecal(iSupMod,ieta,iphi);
648 //Apply calibration to get ADC counts and partial decalibration as especified in OCDB
649 energy = (energy + fADCpedestalEC)/fADCchannelEC/fADCchannelECDecal ;
650 time += fTimeChannel-fTimeChannelDecal;
652 if(energy > fNADCEC )
656 //_____________________________________________________________________
657 void AliEMCALDigitizer::Decalibrate(AliEMCALDigit *digit)
660 const AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance();
663 AliFatal("Did not get geometry from EMCALLoader");
667 Int_t absId = digit->GetId();
675 Bool_t bCell = geom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
677 if (!bCell) Error("DigitizeEnergyTime","Wrong cell id number : absId %i ", absId) ;
678 geom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
681 fADCchannelEC = fCalibData->GetADCchannel(iSupMod,ieta,iphi);
682 float factor = 1./(fADCchannelEC/0.0162);
684 *digit = *digit * factor;
688 //_____________________________________________________________________
689 void AliEMCALDigitizer::CalibrateADCTime(Float_t & adc, Float_t & time, const Int_t absId)
691 // Returns the energy in a cell absId with a given adc value
692 // using the calibration constants stored in the OCDB. Time also corrected from parameter in OCDB
693 // Used in case of embedding, transform ADC counts from real event into energy
694 // so that we can add the energy of the simulated sdigits which are in energy
696 // Same as in AliEMCALClusterizer::Calibrate() but here we do not reject channels being marked as hot
697 // or with time out of window
700 const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
703 AliFatal("Did not get geometry from EMCALLoader");
713 Bool_t bCell = geom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
715 Error("CalibrateADCTime","Wrong cell id number : absId %i ", absId) ;
716 geom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
719 fADCpedestalEC = fCalibData->GetADCpedestal(iSupMod,ieta,iphi);
720 fADCchannelEC = fCalibData->GetADCchannel (iSupMod,ieta,iphi);
721 fTimeChannel = fCalibData->GetTimeChannel(iSupMod,ieta,iphi,0);// Assign bunch crossing number equal to 0 (has simulation different bunch crossings?)
724 adc = adc * fADCchannelEC - fADCpedestalEC;
725 time -= fTimeChannel;
731 //____________________________________________________________________________
732 void AliEMCALDigitizer::Digitize(Option_t *option)
734 // Steering method to process digitization for events
735 // in the range from fFirstEvent to fLastEvent.
736 // This range is optionally set by SetEventRange().
737 // if fLastEvent=-1, then process events until the end.
738 // by default fLastEvent = fFirstEvent (process only one event)
740 if (!fInit) { // to prevent overwrite existing file
741 Error( "Digitize", "Give a version name different from %s", fEventFolderName.Data() ) ;
745 if (strstr(option,"print")) {
751 if(strstr(option,"tim"))
752 gBenchmark->Start("EMCALDigitizer");
754 AliRunLoader *rl = AliRunLoader::Instance();
755 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
758 AliFatal("Did not get the Loader");
762 if (fLastEvent == -1) {
763 fLastEvent = rl->GetNumberOfEvents() - 1 ;
766 fLastEvent = fFirstEvent ; // what is this ??
768 nEvents = fLastEvent - fFirstEvent + 1;
771 TClonesArray* digitsTMP = new TClonesArray("AliEMCALDigit", 32*96);
772 TClonesArray* digitsTRG = new TClonesArray("AliEMCALRawDigit", 32*96);
774 rl->LoadSDigits("EMCAL");
775 for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
777 rl->GetEvent(ievent);
779 Digitize(ievent) ; //Add prepared SDigits to digits and add the noise
784 //-------------------------------------
787 Digits2FastOR(digitsTMP, digitsTRG);
789 WriteDigits(digitsTRG);
791 (emcalLoader->TreeD())->Fill();
793 emcalLoader->WriteDigits( "OVERWRITE");
797 digitsTRG ->Delete();
798 digitsTMP ->Delete();
800 //-------------------------------------
802 if(strstr(option,"deb"))
804 if(strstr(option,"table")) gObjectTable->Print();
806 //increment the total number of Digits per run
807 fDigitsInRun += emcalLoader->Digits()->GetEntriesFast() ;
812 if(strstr(option,"tim")){
813 gBenchmark->Stop("EMCALDigitizer");
814 Float_t cputime = gBenchmark->GetCpuTime("EMCALDigitizer");
815 Float_t avcputime = cputime;
816 if(nEvents==0) avcputime = 0 ;
817 AliInfo(Form("Digitize: took %f seconds for Digitizing %f seconds per event", cputime, avcputime)) ;
821 //__________________________________________________________________
822 Float_t AliEMCALDigitizer::GetTimeResolution(Float_t energy) const
827 res = TMath::Sqrt(fTimeResolutionPar0 +
828 fTimeResolutionPar1/(energy*energy) );
830 // parametrization above is for ns. Convert to seconds:
834 //____________________________________________________________________________
835 void AliEMCALDigitizer::Digits2FastOR(TClonesArray* digitsTMP, TClonesArray* digitsTRG)
837 // FEE digits afterburner to produce TRG digits
838 // we are only interested in the FEE digit deposited energy
839 // to be converted later into a voltage value
841 // push the FEE digit to its associated FastOR (numbered from 0:95)
842 // TRU is in charge of summing module digits
844 AliRunLoader *runLoader = AliRunLoader::Instance();
846 AliRun* run = runLoader->GetAliRun();
848 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(runLoader->GetDetectorLoader("EMCAL"));
850 AliFatal("Did not get the Loader");
853 AliEMCAL* emcal = dynamic_cast<AliEMCAL*>(run->GetDetector("EMCAL"));
855 AliEMCALGeometry* geom = emcal->GetGeometry();
857 // build FOR from simulated digits
858 // and xfer to the corresponding TRU input (mapping)
860 TClonesArray* sdigits = emcalLoader->SDigits();
862 TClonesArray *digits = (TClonesArray*)sdigits->Clone();
864 AliDebug(999,Form("=== %d SDigits to trigger digits ===",digits->GetEntriesFast()));
866 TIter NextDigit(digits);
867 while (AliEMCALDigit* digit = (AliEMCALDigit*)NextDigit())
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();
934 else AliFatal("Could not get AliEMCAL");
939 //____________________________________________________________________________
940 void AliEMCALDigitizer::DigitalFastOR( Double_t time, Double_t dE, Int_t timeSamples[], Int_t nSamples )
944 const Int_t reso = 11; // 11-bit resolution ADC
945 const Double_t vFSR = 1; // Full scale input voltage range
946 // const Double_t dNe = 125; // signal of the APD per MeV of energy deposit in a tower: 125 photo-e-/MeV @ M=30
947 const Double_t dNe = 125/1.3; // F-ALTRO max V. FEE: factor 4
948 const Double_t vA = .136e-6; // CSP output range: 0.136uV/e-
949 const Double_t rise = 50e-9; // rise time (10-90%) of the FastOR signal before shaping
951 const Double_t kTimeBinWidth = 25E-9; // sampling frequency (40MHz)
953 Double_t vV = 1000. * dE * dNe * vA; // GeV 2 MeV
955 TF1 signalF("signal", AnalogFastORFunction, 0, nSamples * kTimeBinWidth, 3);
956 signalF.SetParameter( 0, vV );
957 signalF.SetParameter( 1, time ); // FIXME: when does the signal arrive? Might account for cable lengths
958 signalF.SetParameter( 2, rise );
960 for (Int_t iTime=0; iTime<nSamples; iTime++)
962 // FIXME: add noise (probably not simply Gaussian) according to DA measurements
963 // probably plan an access to OCDB
965 timeSamples[iTime] = int((TMath::Power(2, reso) / vFSR) * signalF.Eval(iTime * kTimeBinWidth) + 0.5);
969 //____________________________________________________________________________
970 Bool_t AliEMCALDigitizer::Init()
972 // Makes all memory allocations
974 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
976 if ( emcalLoader == 0 ) {
977 Fatal("Init", "Could not obtain the AliEMCALLoader");
982 fLastEvent = fFirstEvent ;
985 fInput = fDigInput->GetNinputs() ;
989 fInputFileNames = new TString[fInput] ;
990 fEventNames = new TString[fInput] ;
991 fInputFileNames[0] = GetTitle() ;
992 fEventNames[0] = fEventFolderName.Data() ;
994 for (index = 1 ; index < fInput ; index++) {
995 fInputFileNames[index] = dynamic_cast<AliStream*>(fDigInput->GetInputStream(index))->GetFileName(0);
996 TString tempo = fDigInput->GetInputFolderName(index) ;
997 fEventNames[index] = tempo.Remove(tempo.Length()-1) ; // strip of the stream number added bt fDigInput
1000 //Calibration instance
1001 fCalibData = emcalLoader->CalibData();
1005 //____________________________________________________________________________
1006 void AliEMCALDigitizer::InitParameters()
1008 // Parameter initialization for digitizer
1010 // Get the parameters from the OCDB via the loader
1011 AliRunLoader *rl = AliRunLoader::Instance();
1012 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
1013 AliEMCALSimParam * simParam = 0x0;
1014 if(emcalLoader) simParam = emcalLoader->SimulationParameters();
1017 simParam = AliEMCALSimParam::GetInstance();
1018 AliWarning("Simulation Parameters not available in OCDB?");
1021 fMeanPhotonElectron = simParam->GetMeanPhotonElectron() ; // 4400; // electrons per GeV
1022 fGainFluctuations = simParam->GetGainFluctuations() ; // 15.0;
1024 fPinNoise = simParam->GetPinNoise();//0.012; // pin noise in GeV from analysis test beam data
1025 if (fPinNoise < 0.0001 )
1026 Warning("InitParameters", "No noise added\n") ;
1027 fTimeNoise = simParam->GetTimeNoise(); // 1.28E-5 s
1028 fDigitThreshold = simParam->GetDigitThreshold(); //fPinNoise * 3; // 3 * sigma
1029 fTimeResolutionPar0 = simParam->GetTimeResolutionPar0();
1030 fTimeResolutionPar1 = simParam->GetTimeResolutionPar1();
1031 fTimeDelay = simParam->GetTimeDelay(); //600e-9 ; // 600 ns
1033 // These defaults are normally not used.
1034 // Values are read from calibration database instead
1035 fADCchannelEC = 0.0153; // Update 24 Apr 2007: 250./16/1024 - width of one ADC channel in GeV
1036 fADCpedestalEC = 0.0 ; // GeV
1037 fADCchannelECDecal = 1.0; // No decalibration by default
1038 fTimeChannel = 0.0; // No time calibration by default
1039 fTimeChannelDecal = 0.0; // No time decalibration by default
1041 fNADCEC = simParam->GetNADCEC();//(Int_t) TMath::Power(2,16) ; // number of channels in Tower ADC - 65536
1043 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",
1044 fMeanPhotonElectron, fGainFluctuations, fPinNoise,fTimeNoise, fDigitThreshold,fTimeResolutionPar0,fTimeResolutionPar1,fNADCEC));
1048 //__________________________________________________________________
1049 void AliEMCALDigitizer::Print1(Option_t * option)
1050 { // 19-nov-04 - just for convenience
1052 PrintDigits(option);
1055 //__________________________________________________________________
1056 void AliEMCALDigitizer::Print (Option_t * ) const
1058 // Print Digitizer's parameters
1059 printf("Print: \n------------------- %s -------------", GetName() ) ;
1060 if( strcmp(fEventFolderName.Data(), "") != 0 ){
1061 printf(" Writing Digits to branch with title %s\n", fEventFolderName.Data()) ;
1065 nStreams = GetNInputStreams() ;
1072 for (index = 0 ; index < nStreams ; index++) {
1073 TString tempo(fEventNames[index]) ;
1075 if ((rl = AliRunLoader::GetRunLoader(tempo)) == 0)
1076 rl = AliRunLoader::Open(fInputFileNames[index], tempo) ;
1077 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
1079 TString fileName( emcalLoader->GetSDigitsFileName() ) ;
1080 if ( fEventNames[index] != AliConfig::GetDefaultEventFolderName()) // only if not the default folder name
1081 fileName = fileName.ReplaceAll(".root", "") + "_" + fEventNames[index] + ".root" ;
1082 printf ("Adding SDigits from %s %s\n", fInputFileNames[index].Data(), fileName.Data()) ;
1086 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1088 if(emcalLoader) printf("\nWriting digits to %s", emcalLoader->GetDigitsFileName().Data()) ;
1089 else printf("\nNULL LOADER");
1091 printf("\nWith following parameters:\n") ;
1092 printf(" Electronics noise in EMC, APD (fPinNoise) = %f, Time = %f \n", fPinNoise, fTimeNoise) ;
1093 printf(" Threshold in Tower (fDigitThreshold) = %d\n", fDigitThreshold) ;
1094 printf("---------------------------------------------------\n") ;
1097 printf("Print: AliEMCALDigitizer not initialized") ;
1100 //__________________________________________________________________
1101 void AliEMCALDigitizer::PrintDigits(Option_t * option)
1103 //utility method for printing digit information
1105 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1107 TClonesArray * digits = emcalLoader->Digits() ;
1108 TClonesArray * sdigits = emcalLoader->SDigits() ;
1110 printf("\n #Digits: %d : sdigits %d ", digits->GetEntriesFast(), sdigits->GetEntriesFast()) ;
1111 printf("\n event %d", emcalLoader->GetRunLoader()->GetEventNumber());
1113 if(strstr(option,"all")){
1115 AliEMCALDigit * digit;
1116 printf("\nEMC digits (with primaries):\n") ;
1117 printf("\n Id Amplitude Time Index Nprim: Primaries list \n") ;
1119 for (index = 0 ; index < digits->GetEntries() ; index++) {
1120 digit = dynamic_cast<AliEMCALDigit *>(digits->At(index)) ;
1122 printf("\n%6d %8f %6.5e %4d %2d : ",
1123 digit->GetId(), digit->GetAmplitude(), digit->GetTime(), digit->GetIndexInList(), digit->GetNprimary()) ;
1125 for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++) {
1126 printf("%d ",digit->GetPrimary(iprimary+1) ) ;
1133 else printf("NULL LOADER, cannot print\n");
1136 //__________________________________________________________________
1137 Float_t AliEMCALDigitizer::TimeOfNoise(void)
1139 // Calculates the time signal generated by noise
1140 //printf("Time noise %e\n",fTimeNoise);
1141 return gRandom->Rndm() * fTimeNoise;
1144 //__________________________________________________________________
1145 void AliEMCALDigitizer::Unload()
1147 // Unloads the SDigits and Digits
1151 for(i = 1 ; i < fInput ; i++){
1152 TString tempo(fEventNames[i]) ;
1154 if ((rl = AliRunLoader::GetRunLoader(tempo)))
1155 rl->GetDetectorLoader("EMCAL")->UnloadSDigits() ;
1157 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1158 if(emcalLoader)emcalLoader->UnloadDigits() ;
1159 else AliFatal("Did not get the loader");
1162 //_________________________________________________________________________________________
1163 void AliEMCALDigitizer::WriteDigits()
1164 { // Makes TreeD in the output file.
1165 // Check if branch already exists:
1166 // if yes, exit without writing: ROOT TTree does not support overwriting/updating of
1167 // already existing branches.
1168 // else creates branch with Digits, named "EMCAL", title "...",
1169 // and branch "AliEMCALDigitizer", with the same title to keep all the parameters
1170 // and names of files, from which digits are made.
1172 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1175 const TClonesArray * digits = emcalLoader->Digits() ;
1176 TTree * treeD = emcalLoader->TreeD();
1178 emcalLoader->MakeDigitsContainer();
1179 treeD = emcalLoader->TreeD();
1182 // -- create Digits branch
1183 Int_t bufferSize = 32000 ;
1184 TBranch * digitsBranch = 0;
1185 if ((digitsBranch = treeD->GetBranch("EMCAL"))) {
1186 digitsBranch->SetAddress(&digits);
1187 AliWarning("Digits Branch already exists. Not all digits will be visible");
1190 treeD->Branch("EMCAL","TClonesArray",&digits,bufferSize);
1191 //digitsBranch->SetTitle(fEventFolderName);
1195 emcalLoader->WriteDigits("OVERWRITE");
1196 emcalLoader->WriteDigitizer("OVERWRITE");
1202 else AliFatal("Loader not available");
1205 //__________________________________________________________________
1206 void AliEMCALDigitizer::WriteDigits(TClonesArray* digits, const char* branchName)
1207 { // overloaded method
1208 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1211 TTree* treeD = emcalLoader->TreeD();
1214 emcalLoader->MakeDigitsContainer();
1215 treeD = emcalLoader->TreeD();
1218 // -- create Digits branch
1219 Int_t bufferSize = 32000;
1221 if (TBranch* triggerBranch = treeD->GetBranch(branchName))
1223 triggerBranch->SetAddress(&digits);
1227 treeD->Branch(branchName,"TClonesArray",&digits,bufferSize);
1232 else AliFatal("Loader not available");