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 of summable digits from different events.
25 // For each event two branches are created in TreeD:
26 // "EMCAL" - list of digits
27 // "AliEMCALDigitizer" - AliEMCALDigitizer with all parameters used in digitization
29 // Note, that one cset title for new digits branch, and repeat digitization with
30 // another set of parameters.
33 // root[0] AliEMCALDigitizer * d = new AliEMCALDigitizer() ;
34 // root[1] d->ExecuteTask()
35 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
36 // //Digitizes SDigitis in all events found in file galice.root
38 // root[2] AliEMCALDigitizer * d1 = new AliEMCALDigitizer("galice1.root") ;
39 // // Will read sdigits from galice1.root
40 // root[3] d1->MixWith("galice2.root")
41 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
42 // // Reads another portion of sdigits from galice2.root
43 // root[3] d1->MixWith("galice3.root")
44 // // Reads another portion of sdigits from galice3.root
45 // root[4] d->ExecuteTask("deb timing")
46 // // Reads SDigits from files galice1.root, galice2.root ....
47 // // mixes them and stores produced Digits in file galice1.root
48 // // deb - prints number of produced digits
49 // // deb all - prints list of produced digits
50 // // timing - prints time used for digitization
51 ////////////////////////////////////////////////////////////////////////////////////
53 //*-- Author: Sahal Yacoob (LBL)
54 // based on : AliEMCALDigitizer
56 // August 2002 Yves Schutz: clone PHOS as closely as possible and intoduction
57 // of new IO (à la PHOS)
58 // November 2003 Aleksei Pavlinov : adopted for Shish-Kebab geometry
59 //_________________________________________________________________________________
61 // --- ROOT system ---
65 #include <TBenchmark.h>
67 #include <TObjectTable.h>
72 // --- AliRoot header files ---
75 #include "AliRunDigitizer.h"
76 #include "AliRunLoader.h"
77 #include "AliCDBManager.h"
78 #include "AliCDBEntry.h"
79 #include "AliEMCALDigit.h"
81 #include "AliEMCALLoader.h"
82 #include "AliEMCALDigitizer.h"
83 #include "AliEMCALSDigitizer.h"
84 #include "AliEMCALGeometry.h"
85 //#include "AliEMCALTick.h"
86 #include "AliEMCALCalibData.h"
87 #include "AliEMCALSimParam.h"
88 #include "AliEMCALRawDigit.h"
92 Double_t HeavisideTheta(Double_t x)
96 if (x > 0.) signal = 1.;
101 Double_t AnalogFastORFunction(Double_t *x, Double_t *par)
103 Double_t v0 = par[0];
104 Double_t t0 = par[1];
105 Double_t tr = par[2];
108 Double_t C1 = 33e-12;
110 Double_t C2 = 22e-12;
114 return (((0.8*(-((TMath::Power(C1,2)*C2*TMath::Power(TMath::E(),(-t + t0)/(C1*R1))*
115 TMath::Power(R1,2)*R2)/(C1*R1 - C2*R2)) +
116 C1*C2*R1*R2*(1 - (C2*TMath::Power(TMath::E(),(-t + t0)/(C2*R2))*R2)/(-(C1*R1) + C2*R2)))*v0*
117 HeavisideTheta(t - t0))/tr
118 - (0.8*(C1*C2*R1*R2 -
119 (TMath::Power(C1,2)*C2*TMath::Power(TMath::E(),(-1.*t + t0 + 1.25*tr)/(C1*R1))*
120 TMath::Power(R1,2)*R2)/(C1*R1 - C2*R2) +
121 (C1*TMath::Power(C2,2)*TMath::Power(TMath::E(),(-1.*t + t0 + 1.25*tr)/(C2*R2))*
122 R1*TMath::Power(R2,2))/(C1*R1 - C2*R2))*v0*
123 HeavisideTheta(t - t0 - 1.25*tr))/tr)/(C2*R1));
127 ClassImp(AliEMCALDigitizer)
130 //____________________________________________________________________________
131 AliEMCALDigitizer::AliEMCALDigitizer()
132 : AliDigitizer("",""),
137 fInputFileNames(0x0),
140 fMeanPhotonElectron(0),
141 // fPedestal(0), //Not used, remove?
142 // fSlope(0), //Not used, remove?
146 // fTimeThreshold(0), //Not used, remove?
147 // fTimeSignalLength(0), //Not used, remove?
151 fEventFolderName(""),
158 fManager = 0 ; // We work in the standalone mode
161 //____________________________________________________________________________
162 AliEMCALDigitizer::AliEMCALDigitizer(TString alirunFileName, TString eventFolderName)
163 : AliDigitizer("EMCAL"+AliConfig::Instance()->GetDigitizerTaskName(), alirunFileName),
164 fDefaultInit(kFALSE),
171 fMeanPhotonElectron(0),
172 // fPedestal(0),//Not used, remove?
173 // fSlope(0), //Not used, remove?
177 // fTimeThreshold(0), //Not used, remove?
178 // fTimeSignalLength(0), //Not used, remove?
182 fEventFolderName(eventFolderName),
190 fManager = 0 ; // We work in the standalone mode
193 //____________________________________________________________________________
194 AliEMCALDigitizer::AliEMCALDigitizer(const AliEMCALDigitizer & d)
195 : AliDigitizer(d.GetName(),d.GetTitle()),
196 fDefaultInit(d.fDefaultInit),
197 fDigitsInRun(d.fDigitsInRun),
200 fInputFileNames(d.fInputFileNames),
201 fEventNames(d.fEventNames),
202 fDigitThreshold(d.fDigitThreshold),
203 fMeanPhotonElectron(d.fMeanPhotonElectron),
204 // fPedestal(d.fPedestal), //Not used, remove?
205 // fSlope(d.fSlope), //Not used, remove?
206 fPinNoise(d.fPinNoise),
207 fTimeDelay(d.fTimeDelay),
208 fTimeResolution(d.fTimeResolution),
209 // fTimeThreshold(d.fTimeThreshold), //Not used, remove?
210 // fTimeSignalLength(d.fTimeSignalLength), //Not used, remove?
211 fADCchannelEC(d.fADCchannelEC),
212 fADCpedestalEC(d.fADCpedestalEC),
214 fEventFolderName(d.fEventFolderName),
215 fFirstEvent(d.fFirstEvent),
216 fLastEvent(d.fLastEvent),
217 fCalibData(d.fCalibData)
222 //____________________________________________________________________________
223 AliEMCALDigitizer::AliEMCALDigitizer(AliRunDigitizer * rd)
224 : AliDigitizer(rd,"EMCAL"+AliConfig::Instance()->GetDigitizerTaskName()),
225 fDefaultInit(kFALSE),
232 fMeanPhotonElectron(0),
233 // fPedestal(0), //Not used, remove?
234 // fSlope(0.), //Not used, remove?
238 // fTimeThreshold(0), //Not used, remove?
239 // fTimeSignalLength(0), //Not used, remove?
248 // ctor Init() is called by RunDigitizer
250 fEventFolderName = fManager->GetInputFolderName(0) ;
251 SetTitle(dynamic_cast<AliStream*>(fManager->GetInputStream(0))->GetFileName(0));
255 //____________________________________________________________________________
256 AliEMCALDigitizer::~AliEMCALDigitizer()
259 if (AliRunLoader::Instance()) {
260 AliLoader *emcalLoader=0;
261 if ((emcalLoader = AliRunLoader::Instance()->GetDetectorLoader("EMCAL")))
262 emcalLoader->CleanDigitizer();
265 AliDebug(1," no runloader present");
267 delete [] fInputFileNames ;
268 delete [] fEventNames ;
272 //____________________________________________________________________________
273 void AliEMCALDigitizer::Digitize(Int_t event)
276 // Makes the digitization of the collected summable digits
277 // for this it first creates the array of all EMCAL modules
278 // filled with noise and after that adds contributions from
279 // SDigits. This design helps to avoid scanning over the
280 // list of digits to add contribution of any new SDigit.
283 // Note that SDigit energy info is stored as an amplitude, so we
284 // must call the Calibrate() method of the SDigitizer to convert it
285 // back to an energy in GeV before adding it to the Digit
287 static int nEMC=0; //max number of digits possible
289 AliRunLoader *rl = AliRunLoader::Instance();
290 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
291 Int_t readEvent = event ;
292 // fManager is data member from AliDigitizer
294 readEvent = dynamic_cast<AliStream*>(fManager->GetInputStream(0))->GetCurrentEventNumber() ;
295 AliDebug(1,Form("Adding event %d from input stream 0 %s %s",
296 readEvent, GetTitle(), fEventFolderName.Data())) ;
297 rl->GetEvent(readEvent);
299 TClonesArray * digits = emcalLoader->Digits() ;
300 digits->Delete() ; //correct way to clear array when memory is
301 //allocated by objects stored in array
304 AliEMCALGeometry *geom = 0;
305 if (rl->GetAliRun()) {
306 AliEMCAL * emcal = (AliEMCAL*)rl->GetAliRun()->GetDetector("EMCAL");
307 geom = emcal->GetGeometry();
310 AliFatal("Could not get AliRun from runLoader");
312 nEMC = geom->GetNCells();
313 AliDebug(1,Form("nEMC %i (number cells in EMCAL) | %s \n", nEMC, geom->GetName()));
317 digits->Expand(nEMC) ;
319 // get first the sdigitizer from the tasks list (must have same name as the digitizer)
320 if ( !emcalLoader->SDigitizer() )
321 emcalLoader->LoadSDigitizer();
322 AliEMCALSDigitizer * sDigitizer = dynamic_cast<AliEMCALSDigitizer*>(emcalLoader->SDigitizer());
326 Fatal("Digitize", "SDigitizer with name %s %s not found", fEventFolderName.Data(), GetTitle() ) ;
330 //take all the inputs to add together and load the SDigits
331 TObjArray * sdigArray = new TObjArray(fInput) ;
332 sdigArray->AddAt(emcalLoader->SDigits(), 0) ;
335 for(i = 1 ; i < fInput ; i++){
336 TString tempo(fEventNames[i]) ;
339 AliRunLoader * rl2 = AliRunLoader::GetRunLoader(tempo) ;
342 rl2 = AliRunLoader::Open(fInputFileNames[i], tempo) ;
345 readEvent = dynamic_cast<AliStream*>(fManager->GetInputStream(i))->GetCurrentEventNumber() ;
346 Info("Digitize", "Adding event %d from input stream %d %s %s", readEvent, i, fInputFileNames[i].Data(), tempo.Data()) ;
348 rl2->GetEvent(readEvent);
349 if(rl2->GetDetectorLoader("EMCAL"))
351 AliEMCALLoader *emcalLoader2 = dynamic_cast<AliEMCALLoader*>(rl2->GetDetectorLoader("EMCAL"));
352 sdigArray->AddAt(emcalLoader2->SDigits(), i) ;
354 else Fatal("Digitize", "Loader of second input not found");
357 //Find the first tower with signal
358 Int_t nextSig = nEMC + 1 ;
359 TClonesArray * sdigits ;
360 for(i = 0 ; i < fInput ; i++){
362 sdigits = dynamic_cast<TClonesArray *>(sdigArray->At(i)) ;
364 if (sdigits->GetEntriesFast() ){
367 Int_t curNext = dynamic_cast<AliEMCALDigit *>(sdigits->At(0))->GetId() ;
368 if(curNext < nextSig)
370 AliDebug(1,Form("input %i : #sdigits %i \n",
371 i, sdigits->GetEntriesFast()));
373 }//First entry is not NULL
375 Info("Digitize", "NULL sdigit pointer");
378 }//There is at least one entry
380 Info("Digitize", "NULL sdigits array");
383 }// SDigits array exists
385 Info("Digitizer","Null sdigit pointer");
389 AliDebug(1,Form("FIRST tower with signal %i \n", nextSig));
391 TArrayI index(fInput) ;
392 index.Reset() ; //Set all indexes to zero
394 AliEMCALDigit * digit ;
395 AliEMCALDigit * curSDigit ;
397 // TClonesArray * ticks = new TClonesArray("AliEMCALTick",1000) ;
399 //Put Noise contribution
400 for(absID = 0; absID < nEMC; absID++){ // Nov 30, 2006 by PAI; was from 1 to nEMC
402 // amplitude set to zero, noise will be added later
403 new((*digits)[absID]) AliEMCALDigit( -1, -1, absID, 0., TimeOfNoise(),kFALSE); // absID-1->absID
404 //look if we have to add signal?
406 digit = dynamic_cast<AliEMCALDigit *>(digits->At(absID)); // absID-1->absID
411 //Add SDigits from all inputs
413 //Int_t contrib = 0 ;
415 //Follow PHOS and comment out this timing model til a better one
416 //can be developed - JLK 28-Apr-2008
418 //Float_t a = digit->GetAmplitude() ;
419 //Float_t b = TMath::Abs( a /fTimeSignalLength) ;
420 //Mark the beginning of the signal
421 //new((*ticks)[contrib++]) AliEMCALTick(digit->GetTime(),0, b);
422 //Mark the end of the signal
423 //new((*ticks)[contrib++]) AliEMCALTick(digit->GetTime()+fTimeSignalLength, -a, -b);
425 // Calculate time as time of the largest digit
426 Float_t time = digit->GetTime() ;
427 Float_t aTime= digit->GetAmplitude() ;
430 for(i = 0; i< fInput ; i++){ //loop over (possible) merge sources
431 if(sdigArray->At(i)) {
432 Int_t sDigitEntries = dynamic_cast<TClonesArray *>(sdigArray->At(i))->GetEntriesFast();
434 if(sDigitEntries > index[i] )
435 curSDigit = dynamic_cast<AliEMCALDigit*>(dynamic_cast<TClonesArray *>(sdigArray->At(i))->At(index[i])) ;
439 //May be several digits will contribute from the same input
440 while(curSDigit && (curSDigit->GetId() == absID)){
441 //Shift primary to separate primaries belonging different inputs
442 Int_t primaryoffset ;
444 primaryoffset = fManager->GetMask(i) ;
447 curSDigit->ShiftPrimary(primaryoffset) ;
449 //Remove old timing model - JLK 28-April-2008
450 //a = curSDigit->GetAmplitude() ;
451 //b = a /fTimeSignalLength ;
452 //new((*ticks)[contrib++]) AliEMCALTick(curSDigit->GetTime(),0, b);
453 //new((*ticks)[contrib++]) AliEMCALTick(curSDigit->GetTime()+fTimeSignalLength, -a, -b);
454 if(curSDigit->GetAmplitude()>aTime) {
455 aTime = curSDigit->GetAmplitude();
456 time = curSDigit->GetTime();
459 *digit = *digit + *curSDigit ; //adds amplitudes of each digit
462 if( sDigitEntries > index[i] )
463 curSDigit = dynamic_cast<AliEMCALDigit*>(dynamic_cast<TClonesArray *>(sdigArray->At(i))->At(index[i])) ;
468 }// loop over merging sources
470 //Here we convert the summed amplitude to an energy in GeV
471 energy = sDigitizer->Calibrate(digit->GetAmplitude()) ; // GeV
472 // add fluctuations for photo-electron creation
473 energy *= static_cast<Float_t>(gRandom->Poisson(fMeanPhotonElectron)) / static_cast<Float_t>(fMeanPhotonElectron) ;
475 //calculate and set time
476 //New timing model needed - JLK 28-April-2008
477 //Float_t time = FrontEdgeTime(ticks) ;
478 digit->SetTime(time) ;
480 //Find next signal module
482 for(i = 0 ; i < fInput ; i++){
483 sdigits = dynamic_cast<TClonesArray *>(sdigArray->At(i)) ;
485 Int_t curNext = nextSig ;
486 if(sdigits->GetEntriesFast() > index[i] && sdigits->At(index[i])){
487 curNext = dynamic_cast<AliEMCALDigit *>(sdigits->At(index[i]))->GetId() ;
489 if(curNext < nextSig) nextSig = curNext ;
496 energy += TMath::Abs(gRandom->Gaus(0., fPinNoise)) ;
498 //Now digitize the energy according to the sDigitizer 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(sDigitizer->Digitize(energy)) ;
502 AliDebug(10,Form(" absID %5i energy %f nextSig %5i\n",
503 absID, energy, nextSig));
504 }// Digit pointer exists
506 Info("Digitizer","Digit pointer is null");
508 } // for(absID = 0; absID < nEMC; absID++)
513 //JLK is it better to call Clear() here?
514 delete sdigArray ; //We should not delete its contents
516 //remove digits below thresholds
517 // until 10-02-2010 remove digits with energy smaller than fDigitThreshold 3*fPinNoise
518 // now, remove digits with Digitized ADC smaller than fDigitThreshold = 3
520 for(i = 0 ; i < nEMC ; i++){
521 digit = dynamic_cast<AliEMCALDigit*>( digits->At(i) ) ;
523 //First get the energy in GeV units.
524 energy = sDigitizer->Calibrate(digit->GetAmplitude()) ;
525 //Then digitize using the calibration constants of the ocdb
526 Float_t ampADC = DigitizeEnergy(energy, digit->GetId()) ;
527 //if(ampADC>2)printf("Digit energy %f, amp %d, amp cal %d, threshold %d\n",energy,digit->GetAmplitude(),ampADC,fDigitThreshold);
528 if(ampADC < fDigitThreshold)
529 digits->RemoveAt(i) ;
531 digit->SetTime(gRandom->Gaus(digit->GetTime(),fTimeResolution) ) ;
537 Int_t ndigits = digits->GetEntriesFast() ;
540 //After we have done the summing and digitizing to create the
541 //digits, now we want to calibrate the resulting amplitude to match
542 //the dynamic range of our real data.
543 for (i = 0 ; i < ndigits ; i++) {
544 digit = dynamic_cast<AliEMCALDigit *>( digits->At(i) ) ;
546 digit->SetIndexInList(i) ;
547 energy = sDigitizer->Calibrate(digit->GetAmplitude()) ;
548 digit->SetAmplitude(DigitizeEnergy(energy, digit->GetId()) ) ;
550 digit->SetTime(digit->GetTime()+fTimeDelay) ;
551 // printf("digit amplitude set at end: i %d, amp %f\n",i,digit->GetAmplitude());
555 }//SDigitizer not null
558 // //_____________________________________________________________________
559 Float_t AliEMCALDigitizer::DigitizeEnergy(Float_t energy, Int_t AbsId)
562 // Returns digitized value of the energy in a cell absId
563 // using the calibration constants stored in the OCDB
564 // or default values if no CalibData object is found.
565 // This effectively converts everything to match the dynamic range
566 // of the real data we will collect
569 const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
571 Float_t channel = -999;
574 AliFatal("Did not get geometry from EMCALLoader");
583 Bool_t bCell = geom->GetCellIndex(AbsId, iSupMod, nModule, nIphi, nIeta) ;
585 Error("DigitizeEnergy","Wrong cell id number : AbsId %i ", AbsId) ;
586 geom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
589 fADCpedestalEC = fCalibData->GetADCpedestal(iSupMod,ieta,iphi);
590 fADCchannelEC = fCalibData->GetADCchannel(iSupMod,ieta,iphi);
593 //channel = static_cast<Int_t> (TMath::Floor( (energy + fADCpedestalEC)/fADCchannelEC )) ;
594 channel = (energy + fADCpedestalEC)/fADCchannelEC ;
596 if(channel > fNADCEC )
604 //____________________________________________________________________________
605 void AliEMCALDigitizer::Exec(Option_t *option)
607 // Steering method to process digitization for events
608 // in the range from fFirstEvent to fLastEvent.
609 // This range is optionally set by SetEventRange().
610 // if fLastEvent=-1, then process events until the end.
611 // by default fLastEvent = fFirstEvent (process only one event)
613 if (!fInit) { // to prevent overwrite existing file
614 Error( "Exec", "Give a version name different from %s", fEventFolderName.Data() ) ;
618 if (strstr(option,"print")) {
624 if(strstr(option,"tim"))
625 gBenchmark->Start("EMCALDigitizer");
627 AliRunLoader *rl = AliRunLoader::Instance();
628 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
631 AliFatal("Did not get the Loader");
634 // Post Digitizer to the white board
635 emcalLoader->PostDigitizer(this) ;
637 if (fLastEvent == -1) {
638 fLastEvent = rl->GetNumberOfEvents() - 1 ;
641 fLastEvent = fFirstEvent ; // what is this ??
643 nEvents = fLastEvent - fFirstEvent + 1;
646 TClonesArray* digitsTMP = new TClonesArray("AliEMCALDigit", 32*96);
647 TClonesArray* digitsTRG = new TClonesArray("AliEMCALRawDigit", 32*96);
649 rl->LoadSDigits("EMCAL");
650 for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
652 rl->GetEvent(ievent);
654 Digitize(ievent) ; //Add prepared SDigits to digits and add the noise
659 //-------------------------------------
662 Digits2FastOR(digitsTMP, digitsTRG);
664 WriteDigits(digitsTRG);
666 (emcalLoader->TreeD())->Fill();
668 emcalLoader->WriteDigits( "OVERWRITE");
669 emcalLoader->WriteDigitizer("OVERWRITE");
673 digitsTRG ->Delete();
674 digitsTMP ->Delete();
676 //-------------------------------------
678 if(strstr(option,"deb"))
680 if(strstr(option,"table")) gObjectTable->Print();
682 //increment the total number of Digits per run
683 fDigitsInRun += emcalLoader->Digits()->GetEntriesFast() ;
686 emcalLoader->CleanDigitizer() ;
690 if(strstr(option,"tim")){
691 gBenchmark->Stop("EMCALDigitizer");
692 AliInfo(Form("Exec: took %f seconds for Digitizing %f seconds per event",
693 gBenchmark->GetCpuTime("EMCALDigitizer"), gBenchmark->GetCpuTime("EMCALDigitizer")/nEvents )) ;
697 //____________________________________________________________________________
698 void AliEMCALDigitizer::Digits2FastOR(TClonesArray* digitsTMP, TClonesArray* digitsTRG)
700 // FEE digits afterburner to produce TRG digits
701 // we are only interested in the FEE digit deposited energy
702 // to be converted later into a voltage value
704 // push the FEE digit to its associated FastOR (numbered from 0:95)
705 // TRU is in charge of summing module digits
707 AliRunLoader *runLoader = AliRunLoader::Instance();
709 AliRun* run = runLoader->GetAliRun();
711 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(runLoader->GetDetectorLoader("EMCAL"));
713 AliFatal("Did not get the Loader");
716 AliEMCALGeometry* geom = dynamic_cast<AliEMCAL*>(run->GetDetector("EMCAL"))->GetGeometry();
718 // build FOR from simulated digits
719 // and xfer to the corresponding TRU input (mapping)
721 TClonesArray* digits = emcalLoader->Digits();
723 TIter NextDigit(digits);
724 while (AliEMCALDigit* digit = (AliEMCALDigit*)NextDigit())
726 Int_t id = digit->GetId();
729 if (geom->GetFastORIndexFromCellIndex(id , trgid))
731 AliDebug(1,Form("trigger digit id: %d from cell id: %d\n",trgid,id));
733 AliEMCALDigit* d = static_cast<AliEMCALDigit*>(digitsTMP->At(trgid));
737 new((*digitsTMP)[trgid]) AliEMCALDigit(*digit);
738 d = (AliEMCALDigit*)digitsTMP->At(trgid);
748 if (AliDebugLevel()) printf("Number of TRG digits: %d\n",digitsTMP->GetEntriesFast());
751 Int_t *timeSamples = new Int_t[nSamples];
753 NextDigit = TIter(digitsTMP);
754 while (AliEMCALDigit* digit = (AliEMCALDigit*)NextDigit())
758 Int_t id = digit->GetId();
759 Float_t time = digit->GetTime();
761 Double_t depositedEnergy = 0.;
762 for (Int_t j = 1; j <= digit->GetNprimary(); j++) depositedEnergy += digit->GetDEPrimary(j);
764 if (AliDebugLevel()) printf("Deposited Energy: %f\n", depositedEnergy);
766 // FIXME: Check digit time!
769 DigitalFastOR(time, depositedEnergy, timeSamples, nSamples);
771 for (Int_t j=0;j<nSamples;j++)
773 timeSamples[j] = ((j << 12) & 0xFF000) | (timeSamples[j] & 0xFFF);
776 new((*digitsTRG)[digitsTRG->GetEntriesFast()]) AliEMCALRawDigit(id, timeSamples, nSamples);
781 delete [] timeSamples;
787 //____________________________________________________________________________
788 void AliEMCALDigitizer::DigitalFastOR( Double_t time, Double_t dE, Int_t timeSamples[], Int_t nSamples )
792 const Int_t reso = 11; // 11-bit resolution ADC
793 const Double_t vFSR = 1; // Full scale input voltage range
794 const Double_t Ne = 125; // signal of the APD per MeV of energy deposit in a tower: 125 photo-e-/MeV @ M=30
795 const Double_t vA = .136e-6; // CSP output range: 0.136uV/e-
796 const Double_t rise = 40e-9; // rise time (10-90%) of the FastOR signal before shaping
798 const Double_t kTimeBinWidth = 25E-9; // sampling frequency (40MHz)
800 Double_t vV = 1000. * dE * Ne * vA; // GeV 2 MeV
802 TF1 signalF("signal", AnalogFastORFunction, 0, nSamples * kTimeBinWidth, 3);
803 signalF.SetParameter( 0, vV );
804 signalF.SetParameter( 1, time ); // FIXME: when does the signal arrive? Might account for cable lengths
805 signalF.SetParameter( 2, rise );
807 for (Int_t iTime=0; iTime<nSamples; iTime++)
809 // FIXME: add noise (probably not simply Gaussian) according to DA measurements
810 // probably plan an access to OCDB
812 timeSamples[iTime] = int((TMath::Power(2, reso) / vFSR) * signalF.Eval(iTime * kTimeBinWidth) + 0.5);
817 //____________________________________________________________________________
818 //Float_t AliEMCALDigitizer::FrontEdgeTime(TClonesArray * ticks)
820 // // Returns the shortest time among all time ticks
822 // ticks->Sort() ; //Sort in accordance with times of ticks
824 // AliEMCALTick * ctick = (AliEMCALTick *) it.Next() ;
825 // Float_t time = ctick->CrossingTime(fTimeThreshold) ;
827 // AliEMCALTick * t ;
828 // while((t=(AliEMCALTick*) it.Next())){
829 // if(t->GetTime() < time) //This tick starts before crossing
834 // time = ctick->CrossingTime(fTimeThreshold) ;
840 //____________________________________________________________________________
841 Bool_t AliEMCALDigitizer::Init()
843 // Makes all memory allocations
845 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
847 if ( emcalLoader == 0 ) {
848 Fatal("Init", "Could not obtain the AliEMCALLoader");
853 fLastEvent = fFirstEvent ;
856 fInput = fManager->GetNinputs() ;
860 fInputFileNames = new TString[fInput] ;
861 fEventNames = new TString[fInput] ;
862 fInputFileNames[0] = GetTitle() ;
863 fEventNames[0] = fEventFolderName.Data() ;
865 for (index = 1 ; index < fInput ; index++) {
866 fInputFileNames[index] = dynamic_cast<AliStream*>(fManager->GetInputStream(index))->GetFileName(0);
867 TString tempo = fManager->GetInputFolderName(index) ;
868 fEventNames[index] = tempo.Remove(tempo.Length()-1) ; // strip of the stream number added bt fManager
871 //to prevent cleaning of this object while GetEvent is called
872 emcalLoader->GetDigitsDataLoader()->GetBaseTaskLoader()->SetDoNotReload(kTRUE);
874 //Calibration instance
875 fCalibData = emcalLoader->CalibData();
879 //____________________________________________________________________________
880 void AliEMCALDigitizer::InitParameters()
882 // Parameter initialization for digitizer
884 // Get the parameters from the OCDB via the loader
885 AliRunLoader *rl = AliRunLoader::Instance();
886 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
887 AliEMCALSimParam * simParam = 0x0;
888 if(emcalLoader) simParam = emcalLoader->SimulationParameters();
891 simParam = AliEMCALSimParam::GetInstance();
892 AliWarning("Simulation Parameters not available in OCDB?");
895 fMeanPhotonElectron = simParam->GetMeanPhotonElectron();//4400; // electrons per GeV
896 fPinNoise = simParam->GetPinNoise();//0.012; // pin noise in GeV from analysis test beam data
897 if (fPinNoise < 0.0001 )
898 Warning("InitParameters", "No noise added\n") ;
899 fDigitThreshold = simParam->GetDigitThreshold(); //fPinNoise * 3; // 3 * sigma
900 fTimeResolution = simParam->GetTimeResolution(); //0.6e-9 ; // 600 pc
901 fTimeDelay = simParam->GetTimeDelay(); //600e-9 ; // 600 ns
903 // These defaults are normally not used.
904 // Values are read from calibration database instead
905 fADCchannelEC = 0.0153; // Update 24 Apr 2007: 250./16/1024 - width of one ADC channel in GeV
906 fADCpedestalEC = 0.0 ; // GeV
908 fNADCEC = simParam->GetNADCEC();//(Int_t) TMath::Power(2,16) ; // number of channels in Tower ADC - 65536
910 AliDebug(2,Form("Mean Photon Electron %d, Noise %f, Digit Threshold %d,Time Resolution %g,NADCEC %d",
911 fMeanPhotonElectron,fPinNoise,fDigitThreshold,fTimeResolution,fNADCEC));
913 // Not used anymore, remove?
914 // fTimeSignalLength = 1.0e-9 ;
915 // fTimeThreshold = 0.001*10000000 ; // Means 1 MeV in terms of SDigits amplitude ??
919 //__________________________________________________________________
920 void AliEMCALDigitizer::MixWith(TString alirunFileName, TString eventFolderName)
922 // Allows to produce digits by superimposing background and signal event.
923 // It is assumed, that headers file with SIGNAL events is opened in
925 // Sets the BACKGROUND event, with which the SIGNAL event is to be mixed
926 // Thus we avoid writing (changing) huge and expensive
927 // backgound files: all output will be writen into SIGNAL, i.e.
928 // opened in constructor file.
930 // One can open as many files to mix with as one needs.
931 // However only Sdigits with the same name (i.e. constructed with the same SDigitizer)
934 if( strcmp(GetName(), "") == 0 )
938 Error("MixWith", "Cannot use this method under AliRunDigitizer") ;
941 // looking for file which contains AliRun
942 if (gSystem->AccessPathName(alirunFileName)) {// file does not exist
943 Error("MixWith", "File %s does not exist!", alirunFileName.Data()) ;
946 // looking for the file which contains SDigits
947 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
950 AliFatal("Did not get the Loader");
953 TString fileName( emcalLoader->GetSDigitsFileName() ) ;
954 if ( eventFolderName != AliConfig::GetDefaultEventFolderName()) // only if not the default folder name
955 fileName = fileName.ReplaceAll(".root", "") + "_" + eventFolderName + ".root" ;
956 if ( (gSystem->AccessPathName(fileName)) ) {
957 Error("MixWith", "The file %s does not exist!", fileName.Data()) ;
960 // need to increase the arrays
961 // MvL: This code only works when fInput == 1, I think.
962 TString tempo = fInputFileNames[fInput-1] ;
963 delete [] fInputFileNames ;
964 fInputFileNames = new TString[fInput+1] ;
965 fInputFileNames[fInput-1] = tempo ;
967 tempo = fEventNames[fInput-1] ;
968 delete [] fEventNames ;
969 fEventNames = new TString[fInput+1] ;
970 fEventNames[fInput-1] = tempo ;
972 fInputFileNames[fInput] = alirunFileName ;
973 fEventNames[fInput] = eventFolderName ;
980 //__________________________________________________________________
981 void AliEMCALDigitizer::Print1(Option_t * option)
982 { // 19-nov-04 - just for convinience
987 //__________________________________________________________________
988 void AliEMCALDigitizer::Print(Option_t*)const
990 // Print Digitizer's parameters
991 printf("Print: \n------------------- %s -------------", GetName() ) ;
992 if( strcmp(fEventFolderName.Data(), "") != 0 ){
993 printf(" Writing Digits to branch with title %s\n", fEventFolderName.Data()) ;
997 nStreams = GetNInputStreams() ;
1004 for (index = 0 ; index < nStreams ; index++) {
1005 TString tempo(fEventNames[index]) ;
1007 if ((rl = AliRunLoader::GetRunLoader(tempo)) == 0)
1008 rl = AliRunLoader::Open(fInputFileNames[index], tempo) ;
1009 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
1011 TString fileName( emcalLoader->GetSDigitsFileName() ) ;
1012 if ( fEventNames[index] != AliConfig::GetDefaultEventFolderName()) // only if not the default folder name
1013 fileName = fileName.ReplaceAll(".root", "") + "_" + fEventNames[index] + ".root" ;
1014 printf ("Adding SDigits from %s %s\n", fInputFileNames[index].Data(), fileName.Data()) ;
1018 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1020 if(emcalLoader) printf("\nWriting digits to %s", emcalLoader->GetDigitsFileName().Data()) ;
1021 else printf("\nNULL LOADER");
1023 printf("\nWith following parameters:\n") ;
1025 printf(" Electronics noise in EMC (fPinNoise) = %f\n", fPinNoise) ;
1026 printf(" Threshold in Tower (fDigitThreshold) = %d\n", fDigitThreshold) ;
1027 printf("---------------------------------------------------\n") ;
1030 printf("Print: AliEMCALDigitizer not initialized") ;
1033 //__________________________________________________________________
1034 void AliEMCALDigitizer::PrintDigits(Option_t * option)
1036 //utility method for printing digit information
1038 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1040 TClonesArray * digits = emcalLoader->Digits() ;
1041 TClonesArray * sdigits = emcalLoader->SDigits() ;
1043 printf("\n #Digits: %d : sdigits %d ", digits->GetEntriesFast(), sdigits->GetEntriesFast()) ;
1044 printf("\n event %d", emcalLoader->GetRunLoader()->GetEventNumber());
1046 if(strstr(option,"all")){
1048 AliEMCALDigit * digit;
1049 printf("\nEMC digits (with primaries):\n") ;
1050 printf("\n Id Amplitude Time Index Nprim: Primaries list \n") ;
1052 for (index = 0 ; index < digits->GetEntries() ; index++) {
1053 digit = dynamic_cast<AliEMCALDigit *>(digits->At(index)) ;
1055 printf("\n%6d %8f %6.5e %4d %2d : ",
1056 digit->GetId(), digit->GetAmplitude(), digit->GetTime(), digit->GetIndexInList(), digit->GetNprimary()) ;
1058 for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++) {
1059 printf("%d ",digit->GetPrimary(iprimary+1) ) ;
1066 else printf("NULL LOADER, cannot print\n");
1069 //__________________________________________________________________
1070 Float_t AliEMCALDigitizer::TimeOfNoise(void)
1072 // Calculates the time signal generated by noise
1073 //PH Info("TimeOfNoise", "Change me") ;
1074 return gRandom->Rndm() * 1.28E-5;
1077 //__________________________________________________________________
1078 void AliEMCALDigitizer::Unload()
1080 // Unloads the SDigits and Digits
1084 for(i = 1 ; i < fInput ; i++){
1085 TString tempo(fEventNames[i]) ;
1087 if ((rl = AliRunLoader::GetRunLoader(tempo)))
1088 rl->GetDetectorLoader("EMCAL")->UnloadSDigits() ;
1090 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1091 if(emcalLoader)emcalLoader->UnloadDigits() ;
1092 else AliFatal("Did not get the loader");
1095 //_________________________________________________________________________________________
1096 void AliEMCALDigitizer::WriteDigits()
1099 // Makes TreeD in the output file.
1100 // Check if branch already exists:
1101 // if yes, exit without writing: ROOT TTree does not support overwriting/updating of
1102 // already existing branches.
1103 // else creates branch with Digits, named "EMCAL", title "...",
1104 // and branch "AliEMCALDigitizer", with the same title to keep all the parameters
1105 // and names of files, from which digits are made.
1107 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1110 const TClonesArray * digits = emcalLoader->Digits() ;
1111 TTree * treeD = emcalLoader->TreeD();
1113 emcalLoader->MakeDigitsContainer();
1114 treeD = emcalLoader->TreeD();
1117 // -- create Digits branch
1118 Int_t bufferSize = 32000 ;
1119 TBranch * digitsBranch = 0;
1120 if ((digitsBranch = treeD->GetBranch("EMCAL"))) {
1121 digitsBranch->SetAddress(&digits);
1122 AliWarning("Digits Branch already exists. Not all digits will be visible");
1125 treeD->Branch("EMCAL","TClonesArray",&digits,bufferSize);
1126 //digitsBranch->SetTitle(fEventFolderName);
1130 emcalLoader->WriteDigits("OVERWRITE");
1131 emcalLoader->WriteDigitizer("OVERWRITE");
1137 else AliFatal("Loader not available");
1140 //__________________________________________________________________
1141 void AliEMCALDigitizer::WriteDigits(TClonesArray* digits, const char* branchName)
1144 AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
1147 TTree* treeD = emcalLoader->TreeD();
1150 emcalLoader->MakeDigitsContainer();
1151 treeD = emcalLoader->TreeD();
1154 // -- create Digits branch
1155 Int_t bufferSize = 32000;
1157 if (TBranch* triggerBranch = treeD->GetBranch(branchName))
1159 triggerBranch->SetAddress(&digits);
1163 treeD->Branch(branchName,"TClonesArray",&digits,bufferSize);
1168 else AliFatal("Loader not available");
1171 //__________________________________________________________________
1172 void AliEMCALDigitizer::Browse(TBrowser* b)