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
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
55 //_________________________________________________________________________________
57 // --- ROOT system ---
63 #include "TObjString.h"
64 #include "TGeometry.h"
65 #include "TBenchmark.h"
66 // --- Standard library ---
69 // --- AliRoot header files ---
72 #include "AliHeader.h"
73 #include "AliEMCALDigit.h"
74 #include "AliEMCALHit.h"
75 #include "AliEMCALTick.h"
76 #include "AliEMCALv1.h"
77 #include "AliEMCALDigitizer.h"
78 #include "AliEMCALSDigitizer.h"
79 #include "AliEMCALGeometry.h"
80 #include "AliEMCALGetter.h"
81 #include "AliRunDigitizer.h"
82 ClassImp(AliEMCALDigitizer)
85 //____________________________________________________________________________
86 AliEMCALDigitizer::AliEMCALDigitizer()
94 //____________________________________________________________________________
95 AliEMCALDigitizer::AliEMCALDigitizer(const char *headerFile,const char *name)
98 SetTitle(headerFile) ;
99 fManager = 0 ; // We work in the standalong mode
106 //____________________________________________________________________________
107 AliEMCALDigitizer::AliEMCALDigitizer(AliRunDigitizer * ard):AliDigitizer(ard)
111 SetTitle("aliroot") ;
114 //____________________________________________________________________________
115 AliEMCALDigitizer::~AliEMCALDigitizer()
119 AliEMCALGetter * gime = AliEMCALGetter::GetInstance() ;
121 // remove the task from the folder list
122 gime->RemoveTask("S",GetName()) ;
123 gime->RemoveTask("D",GetName()) ;
125 // remove the Digits from the folder list
126 gime->RemoveObjects("D", GetName()) ;
128 // remove the SDigits from the folder list
129 gime->RemoveSDigits() ;
137 //____________________________________________________________________________
138 void AliEMCALDigitizer::InitParameters()
142 fPinNoise = 0.00001 ;
143 fTowerDigitThreshold = 0.001 ;
144 fTimeResolution = 0.5e-9 ;
145 fTimeSignalLength = 1.0e-9 ;
146 fPreShowerDigitThreshold = fTowerDigitThreshold/25. ;
147 fInitialized = kFALSE ;
148 fADCchannelTower = 0.000220; // width of one ADC channel in GeV
149 fADCpedestalTower = 0.005 ; // GeV
150 fNADCTower = (Int_t) TMath::Power(2,16) ; // number of channels in Tower ADC
152 fADCchannelPreSho = 0.0000300; // width of one ADC channel in Pre Shower
153 fADCpedestalPreSho = 0.005 ; //
154 fNADCPreSho = (Int_t) TMath::Power(2,12); // number of channels in Pre ShowerADC
156 fTimeThreshold = 0.001*10000000 ; //Means 1 MeV in terms of SDigits amplitude
160 //____________________________________________________________________________
161 Bool_t AliEMCALDigitizer::Init()
163 // Makes all memory allocations
165 AliEMCALGetter * gime = AliEMCALGetter::GetInstance(GetTitle(), GetName(), "update") ;
167 cerr << "ERROR: AliEMCALDigitizer::Init -> Could not obtain the Getter object !" << endl ;
171 //const AliEMCALGeometry * geom = gime->EMCALGeometry() ;
172 //fEmcCrystals = geom->GetNModules() * geom->GetNCristalsInModule() ;
174 // Post Digits to the white board
175 gime->PostDigits(GetName() ) ;
177 // Post Digitizer to the white board
178 gime->PostDigitizer(this) ;
180 //Mark that we will use current header file
182 gime->PostSDigits(GetName(),GetTitle()) ;
183 gime->PostSDigitizer(GetName(),GetTitle()) ;
189 //____________________________________________________________________________
190 void AliEMCALDigitizer::Reset() {
191 //sets current event number to the first simulated event
192 if( strcmp(GetName(), "") == 0 )
196 // for(inputs = 0; inputs < fNinputs ;inputs++)
197 // fIevent->AddAt(-1, inputs ) ;
201 //____________________________________________________________________________
202 void AliEMCALDigitizer::Digitize(const Int_t event) {
204 // Makes the digitization of the collected summable digits
205 // for this it first creates the array of all EMCAL modules
206 // filled with noise (different for EMC, CPV and PPSD) and
207 // after that adds contributions from SDigits. This design
208 // helps to avoid scanning over the list of digits to add
209 // contribution of any new SDigit.
211 AliEMCALGetter * gime = AliEMCALGetter::GetInstance() ;
212 TClonesArray * digits = gime->Digits(GetName()) ;
216 const AliEMCALGeometry *geom = gime->EMCALGeometry() ;
219 //Making digits with noise, first EMC
220 Int_t nEMC = 2*geom->GetNPhi()*geom->GetNZ();
222 TString name = geom->GetName() ;
224 // get first the sdigitizer from the tasks list (must have same name as the digitizer)
225 const AliEMCALSDigitizer * sDigitizer = gime->SDigitizer(GetName());
227 cerr << "ERROR: AliEMCALDigitizer::Digitize -> SDigitizer with name " << GetName() << " not found " << endl ;
230 // loop through the sdigits posted to the White Board and add them to the noise
231 TCollection * folderslist = gime->SDigitsFolder()->GetListOfFolders() ;
232 TIter next(folderslist) ;
233 TFolder * folder = 0 ;
234 TClonesArray * sdigits = 0 ;
236 TObjArray * sdigArray = new TObjArray(2) ;
237 while ( (folder = (TFolder*)next()) ) {
238 if ( (sdigits = (TClonesArray*)folder->FindObject(GetName()) ) ) {
239 TString fileName(folder->GetName()) ;
240 fileName.ReplaceAll("_","/") ;
241 cout << "INFO: AliEMCALDigitizer::Digitize -> Adding SDigits "
242 << GetName() << " from " << fileName << endl ;
243 sdigArray->AddAt(sdigits, input) ;
248 //Find the first tower with signal
249 Int_t nextSig = 200000 ;
251 for(i=0; i<input; i++){
252 sdigits = (TClonesArray *)sdigArray->At(i) ;
253 if ( !sdigits->GetEntriesFast() )
255 Int_t curNext = ((AliEMCALDigit *)sdigits->At(0))->GetId() ;
256 if(curNext < nextSig)
260 TArrayI index(input) ;
261 index.Reset() ; //Set all indexes to zero
263 AliEMCALDigit * digit = 0 ;
264 AliEMCALDigit * curSDigit = 0 ;
266 TClonesArray * ticks = new TClonesArray("AliEMCALTick",1000) ;
268 //Put Noise contribution
269 for(absID = 1; absID <= nEMC; absID++){
270 Float_t noise = gRandom->Gaus(0., fPinNoise);
271 new((*digits)[absID-1]) AliEMCALDigit( -1, -1, absID,sDigitizer->Digitize(noise), TimeOfNoise() ) ;
272 //look if we have to add signal?
273 digit = (AliEMCALDigit *) digits->At(absID-1) ;
275 //Add SDigits from all inputs
278 Float_t a = digit->GetAmp() ;
279 Float_t b = TMath::Abs( a /fTimeSignalLength) ;
280 //Mark the beginnign of the signal
281 new((*ticks)[contrib++]) AliEMCALTick(digit->GetTime(),0, b);
282 //Mark the end of the ignal
283 new((*ticks)[contrib++]) AliEMCALTick(digit->GetTime()+fTimeSignalLength, -a, -b);
287 for(i = 0; i< input ; i++){ //loop over (possible) merge sources
288 if(((TClonesArray *)sdigArray->At(i))->GetEntriesFast() > index[i] )
289 curSDigit = (AliEMCALDigit*)((TClonesArray *)sdigArray->At(i))->At(index[i]) ;
292 //May be several digits will contribute from the same input
293 while(curSDigit && curSDigit->GetId() == absID){
294 //Shift primary to separate primaries belonging different inputs
295 Int_t primaryoffset ;
297 primaryoffset = fManager->GetMask(i) ;
300 curSDigit->ShiftPrimary(primaryoffset) ;
302 a = curSDigit->GetAmp() ;
303 b = a /fTimeSignalLength ;
304 new((*ticks)[contrib++]) AliEMCALTick(curSDigit->GetTime(),0, b);
305 new((*ticks)[contrib++]) AliEMCALTick(curSDigit->GetTime()+fTimeSignalLength, -a, -b);
307 *digit = *digit + *curSDigit ; //add energies
310 if(((TClonesArray *)sdigArray->At(i))->GetEntriesFast() > index[i] )
311 curSDigit = (AliEMCALDigit*)((TClonesArray *)sdigArray->At(i))->At(index[i]) ;
317 //calculate and set time
318 Float_t time = FrontEdgeTime(ticks) ;
319 digit->SetTime(time) ;
321 //Find next signal module
323 for(i=0; i<input; i++){
324 sdigits = ((TClonesArray *)sdigArray->At(i)) ;
325 Int_t curNext = nextSig ;
326 if(sdigits->GetEntriesFast() > index[i] ){
327 curNext = ((AliEMCALDigit *) sdigits->At(index[i]))->GetId() ;
330 if(curNext < nextSig) nextSig = curNext ;
341 //remove digits below thresholds
343 for(absID = 0; absID < nEMC/2 ; absID++){
344 if(sDigitizer->Calibrate(((AliEMCALDigit*)digits->At(absID))->GetAmp()) < fTowerDigitThreshold)
345 digits->RemoveAt(absID) ;
347 digit->SetTime(gRandom->Gaus(digit->GetTime(),fTimeResolution) ) ;
350 for(absID = nEMC/2; absID < nEMC ; absID++){
352 if(sDigitizer->Calibrate(((AliEMCALDigit*)digits->At(absID))->GetAmp()) < fPreShowerDigitThreshold)
353 digits->RemoveAt(absID) ;
355 digit->SetTime(gRandom->Gaus(digit->GetTime(),fTimeResolution) ) ;
360 Int_t ndigits = digits->GetEntriesFast() ;
362 digits->Expand(ndigits) ;
365 //Set indexes in list of digits
367 for (i = 0 ; i < ndigits ; i++) {
368 AliEMCALDigit * digit = (AliEMCALDigit *) digits->At(i) ;
369 digit->SetIndexInList(i) ;
370 Float_t energy = sDigitizer->Calibrate(digit->GetAmp()) ;
371 digit->SetAmp(DigitizeEnergy(energy,digit->GetId()) ) ;
375 //____________________________________________________________________________
377 Int_t AliEMCALDigitizer::DigitizeEnergy(Float_t energy, Int_t absId)
379 Int_t channel = -999;
380 Int_t nphi = AliEMCALGetter::GetInstance()->EMCALGeometry()->GetNPhi() ;
381 Int_t nz = AliEMCALGetter::GetInstance()->EMCALGeometry()->GetNZ() ;
383 if(absId <= nphi*nz){ //digitize as tower
384 channel = static_cast<Int_t> (TMath::Ceil( (energy + fADCpedestalTower)/fADCchannelTower )) ;
385 if(channel > fNADCTower )
386 channel = fNADCTower ;
388 channel = static_cast<Int_t>(TMath::Ceil( (energy + fADCpedestalPreSho)/fADCchannelPreSho )) ;
389 if(channel > fNADCPreSho )
390 channel = fNADCPreSho ;
396 //____________________________________________________________________________
397 void AliEMCALDigitizer::Exec(Option_t *option) {
399 if(strcmp(GetName(), "") == 0 )
402 if (strstr(option,"print")) {
407 if(strstr(option,"tim"))
408 gBenchmark->Start("EMCALDigitizer");
410 AliEMCALGetter * gime = AliEMCALGetter::GetInstance() ;
417 treeD = fManager->GetTreeD() ;
418 nevents = 1 ; // Will process only one event
421 gAlice->GetEvent(0) ;
422 nevents = (Int_t) gAlice->TreeE()->GetEntries() ;
423 treeD=gAlice->TreeD() ;
427 //Check, if this branch already exits
429 TObjArray * lob = (TObjArray*)treeD->GetListOfBranches() ;
431 TBranch * branch = 0 ;
432 Bool_t emcalfound = kFALSE, digitizerfound = kFALSE ;
434 while ( (branch = (TBranch*)next()) && (!emcalfound || !digitizerfound) ) {
435 if ( (strcmp(branch->GetName(), "EMCAL")==0) &&
436 (strcmp(branch->GetTitle(), GetName())==0) )
439 else if ( (strcmp(branch->GetName(), "AliEMCALDigitizer")==0) &&
440 (strcmp(branch->GetTitle(), GetName())==0) )
441 digitizerfound = kTRUE ;
445 cerr << "WARNING: AliEMCALDigitizer -> Digits branch with name " << GetName()
446 << " already exits" << endl ;
449 if ( digitizerfound ) {
450 cerr << "WARNING: AliEMCALDigitizer -> Digitizer branch with name " << GetName()
451 << " already exits" << endl ;
457 for(ievent = 0; ievent < nevents; ievent++){
461 for(input = 0 ; input < fManager->GetNinputs(); input ++){
462 TTree * treeS = fManager->GetInputTreeS(input) ;
464 cerr << "AliEMCALDigitizer -> No Input " << endl ;
467 gime->ReadTreeS(treeS,input) ;
471 gime->Event(ievent,"S") ;
473 Digitize(ievent) ; //Add prepared SDigits to digits and add the noise
475 WriteDigits(ievent) ;
477 if(strstr(option,"deb"))
480 //increment the total number of Digits per run
481 fDigitsInRun += gime->Digits()->GetEntriesFast() ;
484 if(strstr(option,"tim")){
485 gBenchmark->Stop("EMCALDigitizer");
486 cout << "AliEMCALDigitizer:" << endl ;
487 cout << " took " << gBenchmark->GetCpuTime("EMCALDigitizer") << " seconds for Digitizing "
488 << gBenchmark->GetCpuTime("EMCALDigitizer")/nevents << " seconds per event " << endl ;
496 //__________________________________________________________________
497 void AliEMCALDigitizer::MixWith(char* headerFile){
498 // Alows produce digits by superimposing background and signal event.
499 // It is assumed, that headers file with SIGNAL events is opened in
500 // constructor, and now we set the BACKGROUND event, with which we
501 // will mix. Thus we avoid writing (changing) huge and expencive
502 // backgound files: all output will be writen into SIGNAL, i.e.
503 // opened in constructor file.
505 // One can open as many files to mix with as one wants.
507 if( strcmp(GetName(), "") == 0 )
511 cout << "Can not use this method under AliRunDigitizer " << endl ;
513 } // check if the specified SDigits do not already exist on the White Board:
514 // //Folders/RunMC/Event/Data/EMCAL/SDigits/headerFile/sdigitsname
516 TString path = "Folders/RunMC/Event/Data/EMCAL/SDigits" ;
520 if ( gROOT->FindObjectAny(path.Data()) ) {
521 cerr << "WARNING: AliEMCALDigitizer::MixWith -> Entry already exists, do not add" << endl ;
525 AliEMCALGetter * gime = AliEMCALGetter::GetInstance() ;
526 gime->PostSDigits(GetName(),headerFile) ;
528 // check if the requested file is already open or exist and if SDigits Branch exist
529 TFile * file = (TFile*)gROOT->FindObject(headerFile);
531 file = new TFile(headerFile, "READ") ;
533 cerr << "ERROR: AliEMCALDigitizer::MixWith -> File " << headerFile << " does not exist!" << endl ;
540 //__________________________________________________________________
541 void AliEMCALDigitizer::Print(Option_t* option)const {
542 if( strcmp(GetName(), "") != 0) {
544 cout << "------------------- "<< GetName() << " -------------" << endl ;
545 cout << "Digitizing sDigits from file(s): " <<endl ;
547 TCollection * folderslist = ((TFolder*)gROOT->FindObjectAny("Folders/RunMC/Event/Data/EMCAL/SDigits"))->GetListOfFolders() ;
548 TIter next(folderslist) ;
549 TFolder * folder = 0 ;
550 while ( (folder = (TFolder*)next()) )
551 if ( folder->FindObject(GetName()) )
553 cout << "Adding SDigits " << GetName() << " from " << folder->GetName() << endl ;
555 cout << "Writing digits to " << GetTitle() << endl ;
558 cout << "With following parameters: " << endl ;
559 cout << " Electronics noise in EMC (fPinNoise) = " << fPinNoise << endl ;
560 cout << " Threshold in EMC (fTowerDigitThreshold) = " << fTowerDigitThreshold << endl;
561 cout << " Threshold in PreShower (fPreShowerDigitThreshold) = " << fPreShowerDigitThreshold << endl ; ;
562 cout << "---------------------------------------------------" << endl ;
565 cout << "AliEMCALDigitizer not initialized " << endl ;
569 //__________________________________________________________________
570 void AliEMCALDigitizer::PrintDigits(Option_t * option){
572 AliEMCALGetter * gime = AliEMCALGetter::GetInstance() ;
573 TClonesArray * fDigits = gime->Digits() ;
575 cout << "AliEMCALDigitiser:"<< endl ;
576 cout << " Number of entries in Digits list " << fDigits->GetEntriesFast() << endl ;
578 if(strstr(option,"all")){
581 AliEMCALDigit * digit;
582 cout << "Digit Id " << " Amplitude " << " Index " << " Nprim " << " Primaries list " << endl;
584 for (index = 0 ; index < fDigits->GetEntries() ; index++) {
585 digit = (AliEMCALDigit * ) fDigits->At(index) ;
586 cout << setw(8) << digit->GetId() << " " << setw(3) << digit->GetAmp() << " "
587 << setw(6) << digit->GetIndexInList() << " "
588 << setw(5) << digit->GetNprimary() <<" ";
591 for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++)
592 cout << setw(5) << digit->GetPrimary(iprimary+1) << " ";
598 //_________________________________________________________________________________________
599 void AliEMCALDigitizer::WriteDigits(Int_t event)
602 // Makes TreeD in the output file.
603 // Check if branch already exists:
604 // if yes, exit without writing: ROOT TTree does not support overwriting/updating of
605 // already existing branches.
606 // else creates branch with Digits, named "EMCAL", title "...",
607 // and branch "AliEMCALDigitizer", with the same title to keep all the parameters
608 // and names of files, from which digits are made.
610 AliEMCALGetter * gime = AliEMCALGetter::GetInstance() ;
611 const TClonesArray * digits = gime->Digits(GetName()) ;
615 treeD = fManager->GetTreeD() ;
617 if (!gAlice->TreeD() )
618 gAlice->MakeTree("D",fSplitFile);
619 treeD = gAlice->TreeD();
622 // -- create Digits branch
623 Int_t bufferSize = 32000 ;
624 TBranch * digitsBranch = treeD->Branch("EMCAL",&digits,bufferSize);
625 digitsBranch->SetTitle(GetName());
627 // -- Create Digitizer branch
628 Int_t splitlevel = 0 ;
629 AliEMCALDigitizer * d = gime->Digitizer(GetName()) ;
630 TBranch * digitizerBranch = treeD->Branch("AliEMCALDigitizer", "AliEMCALDigitizer", &d,bufferSize,splitlevel);
631 digitizerBranch->SetTitle(GetName());
633 digitsBranch->Fill() ;
634 digitizerBranch->Fill() ;
638 //____________________________________________________________________________
639 Float_t AliEMCALDigitizer::FrontEdgeTime(TClonesArray * ticks)
641 ticks->Sort() ; //Sort in accordance with times of ticks
643 AliEMCALTick * ctick = (AliEMCALTick *) it.Next() ;
644 Float_t time = ctick->CrossingTime(fTimeThreshold) ;
647 while((t=(AliEMCALTick*) it.Next())){
648 if(t->GetTime() < time) //This tick starts before crossing
653 time = ctick->CrossingTime(fTimeThreshold) ;
657 //____________________________________________________________________________
658 Float_t AliEMCALDigitizer::TimeOfNoise(void)
659 { // Calculates the time signal generated by noise
660 //to be rewritten, now returns just big number
664 //____________________________________________________________________________
665 void AliEMCALDigitizer::SetSDigitsBranch(const char* title)
667 // we set title (comment) of the SDigits branch in the first! header file
668 if( strcmp(GetName(), "") == 0 )
671 AliEMCALGetter::GetInstance()->SDigits()->SetName(title) ;
674 //__________________________________________________________________
675 void AliEMCALDigitizer::SetSplitFile(const TString splitFileName)
677 // Diverts the Digits in a file separate from the hits file
679 // I guess it is not going to work if we do merging
681 cerr << "ERROR: AliEMCALDigitizer::SetSplitFile -> Not yet available in case of merging activated " << endl ;
685 TDirectory * cwd = gDirectory ;
686 if ( !(gAlice->GetTreeDFileName() == splitFileName) ) {
687 if (gAlice->GetTreeDFile() )
688 gAlice->GetTreeDFile()->Close() ;
691 fSplitFile = gAlice->InitTreeFile("D",splitFileName.Data());
693 gAlice->Write(0, TObject::kOverwrite);
695 TTree *treeE = gAlice->TreeE();
697 cerr << "ERROR: AliEMCALDigitizer::SetSplitFile -> No TreeE found "<<endl;
702 AliHeader *header = new AliHeader();
703 treeE->SetBranchAddress("Header", &header);
704 treeE->SetBranchStatus("*",1);
705 TTree *treeENew = treeE->CloneTree();
706 treeENew->Write(0, TObject::kOverwrite);
709 TGeometry *AliceGeom = static_cast<TGeometry*>(cwd->Get("AliceGeom"));
711 cerr << "ERROR: AliEMCALDigitizer::SetSplitFile -> AliceGeom was not found in the input file "<<endl;
714 AliceGeom->Write(0, TObject::kOverwrite);
716 gAlice->MakeTree("D",fSplitFile);
718 cout << "INFO: AliEMCALDigitizer::SetSPlitMode -> Digits will be stored in " << splitFileName.Data() << endl ;