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4 * Author: The ALICE Off-line Project. *
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18 //-- Author: Yves Schutz (SUBATECH) & Dmitri Peressounko (SUBATECH & Kurchatov Institute)
19 // August 2002 Yves Schutz: clone PHOS as closely as possible and intoduction
20 // of new IO (à la PHOS)
21 // Mar 2007, Aleksei Pavlinov - new algoritmh of pseudo clusters
22 //////////////////////////////////////////////////////////////////////////////
23 // Clusterization class. Performs clusterization (collects neighbouring active cells) and
24 // unfolds the clusters having several local maxima.
25 // Results are stored in TreeR#, branches EMCALTowerRP (EMC recPoints),
26 // EMCALPreShoRP (CPV RecPoints) and AliEMCALClusterizer (Clusterizer with all
27 // parameters including input digits branch title, thresholds etc.)
28 // This TTask is normally called from Reconstructioner, but can as well be used in
31 // root [0] AliEMCALClusterizerv1 * cl = new AliEMCALClusterizerv1("galice.root")
32 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
33 // //reads gAlice from header file "..."
34 // root [1] cl->ExecuteTask()
35 // //finds RecPoints in all events stored in galice.root
36 // root [2] cl->SetDigitsBranch("digits2")
37 // //sets another title for Digitis (input) branch
38 // root [3] cl->SetRecPointsBranch("recp2")
39 // //sets another title four output branches
40 // root [4] cl->SetTowerLocalMaxCut(0.03)
41 // //set clusterization parameters
42 // root [5] cl->ExecuteTask("deb all time")
43 // //once more finds RecPoints options are
44 // // deb - print number of found rec points
45 // // deb all - print number of found RecPoints and some their characteristics
46 // // time - print benchmarking results
48 // --- ROOT system ---
59 #include <TBenchmark.h>
63 // --- Standard library ---
66 // --- AliRoot header files ---
67 #include "AliRunLoader.h"
70 #include "AliEMCALClusterizerv1.h"
71 #include "AliEMCALRecPoint.h"
72 #include "AliEMCALDigit.h"
73 #include "AliEMCALDigitizer.h"
75 #include "AliEMCALGeometry.h"
76 #include "AliEMCALRecParam.h"
77 #include "AliEMCALReconstructor.h"
78 #include "AliCDBManager.h"
79 #include "AliCaloCalibPedestal.h"
80 #include "AliEMCALCalibData.h"
82 #include "AliCDBEntry.h"
84 ClassImp(AliEMCALClusterizerv1)
86 //____________________________________________________________________________
87 AliEMCALClusterizerv1::AliEMCALClusterizerv1()
88 : AliEMCALClusterizer(),
92 fNumberOfECAClusters(0),fCalibData(0),fCaloPed(0),
93 fADCchannelECA(0.),fADCpedestalECA(0.),fECAClusteringThreshold(0.),fECALocMaxCut(0.),
94 fECAW0(0.),fTimeCut(1.),fTimeMin(-1.),fTimeMax(1.),fMinECut(0.)
96 // ctor with the indication of the file where header Tree and digits Tree are stored
101 //____________________________________________________________________________
102 AliEMCALClusterizerv1::AliEMCALClusterizerv1(AliEMCALGeometry* geometry)
103 : AliEMCALClusterizer(),
105 fDefaultInit(kFALSE),
107 fNumberOfECAClusters(0),fCalibData(0), fCaloPed(0),
108 fADCchannelECA(0.),fADCpedestalECA(0.),fECAClusteringThreshold(0.),fECALocMaxCut(0.),
109 fECAW0(0.),fTimeCut(1.),fTimeMin(-1.),fTimeMax(1.),fMinECut(0.)
111 // ctor with the indication of the file where header Tree and digits Tree are stored
112 // use this contructor to avoid usage of Init() which uses runloader
113 // change needed by HLT - MP
115 // Note for the future: the use on runloader should be avoided or optional at least
116 // another way is to make Init virtual and protected at least such that the deriving classes can overload
122 AliFatal("Geometry not initialized.");
127 //____________________________________________________________________________
128 AliEMCALClusterizerv1::AliEMCALClusterizerv1(AliEMCALGeometry* geometry, AliEMCALCalibData * calib, AliCaloCalibPedestal * caloped)
129 : AliEMCALClusterizer(),
131 fDefaultInit(kFALSE),
133 fNumberOfECAClusters(0),fCalibData(calib), fCaloPed(caloped),
134 fADCchannelECA(0.),fADCpedestalECA(0.),fECAClusteringThreshold(0.),fECALocMaxCut(0.),
135 fECAW0(0.),fTimeCut(1.),fTimeMin(-1.),fTimeMax(1.),fMinECut(0.)
137 // ctor, geometry and calibration are initialized elsewhere.
140 AliFatal("Geometry not initialized.");
145 //____________________________________________________________________________
146 AliEMCALClusterizerv1::~AliEMCALClusterizerv1()
151 //____________________________________________________________________________
152 Float_t AliEMCALClusterizerv1::Calibrate(const Float_t amp, const Float_t time, const Int_t absId)
155 // Convert digitized amplitude into energy.
156 // Calibration parameters are taken from calibration data base for raw data,
157 // or from digitizer parameters for simulated data.
162 AliFatal("Did not get geometry from EMCALLoader") ;
171 Bool_t bCell = fGeom->GetCellIndex(absId, iSupMod, nModule, nIphi, nIeta) ;
173 fGeom->PrintGeometry();
174 Error("Calibrate()"," Wrong cell id number : %i", absId);
178 fGeom->GetCellPhiEtaIndexInSModule(iSupMod,nModule,nIphi, nIeta,iphi,ieta);
180 // Check if channel is bad (dead or hot), in this case return 0.
181 // Gustavo: 15-12-09 In case of RAW data this selection is already done, but not in simulation.
182 // for the moment keep it here but remember to do the selection at the sdigitizer level
183 // and remove it from here
184 Int_t channelStatus = (Int_t)(fCaloPed->GetDeadMap(iSupMod))->GetBinContent(ieta,iphi);
185 if(channelStatus == AliCaloCalibPedestal::kHot || channelStatus == AliCaloCalibPedestal::kDead) {
186 AliDebug(2,Form("Tower from SM %d, ieta %d, iphi %d is BAD : status %d !!!",iSupMod,ieta,iphi, channelStatus));
189 //Check if time is too large or too small, indication of a noisy channel, remove in this case
190 if(time > fTimeMax || time < fTimeMin) return 0;
192 fADCchannelECA = fCalibData->GetADCchannel (iSupMod,ieta,iphi);
193 fADCpedestalECA = fCalibData->GetADCpedestal(iSupMod,ieta,iphi);
195 return -fADCpedestalECA + amp * fADCchannelECA ;
198 else //Return energy with default parameters if calibration is not available
199 return -fADCpedestalECA + amp * fADCchannelECA ;
203 //____________________________________________________________________________
204 void AliEMCALClusterizerv1::Digits2Clusters(Option_t * option)
206 // Steering method to perform clusterization for the current event
209 if(strstr(option,"tim"))
210 gBenchmark->Start("EMCALClusterizer");
212 if(strstr(option,"print"))
215 //Get calibration parameters from file or digitizer default values.
216 GetCalibrationParameters() ;
218 //Get dead channel map from file or digitizer default values.
219 GetCaloCalibPedestal() ;
221 fNumberOfECAClusters = 0;
223 MakeClusters() ; //only the real clusters
230 //Evaluate position, dispersion and other RecPoint properties for EC section
231 for(index = 0; index < fRecPoints->GetEntries(); index++) {
232 dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index))->EvalAll(fECAW0,fDigitsArr) ;
233 //For each rec.point set the distance to the nearest bad crystal
234 dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index))->EvalDistanceToBadChannels(fCaloPed);
239 for(index = 0; index < fRecPoints->GetEntries(); index++) {
240 (dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index)))->SetIndexInList(index) ;
241 (dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(index)))->Print();
246 if(strstr(option,"deb") || strstr(option,"all"))
247 PrintRecPoints(option) ;
249 AliDebug(1,Form("EMCAL Clusterizer found %d Rec Points",fRecPoints->GetEntriesFast()));
251 fRecPoints->Delete();
253 if(strstr(option,"tim")){
254 gBenchmark->Stop("EMCALClusterizer");
255 printf("Exec took %f seconds for Clusterizing",
256 gBenchmark->GetCpuTime("EMCALClusterizer"));
260 //____________________________________________________________________________
261 Bool_t AliEMCALClusterizerv1::FindFit(AliEMCALRecPoint * recPoint, AliEMCALDigit ** maxAt,
262 const Float_t* maxAtEnergy,
263 Int_t nPar, Float_t * fitparameters) const
265 // Calls TMinuit to fit the energy distribution of a cluster with several maxima
266 // The initial values for fitting procedure are set equal to the
267 // positions of local maxima.
268 // Cluster will be fitted as a superposition of nPar/3
269 // electromagnetic showers
271 if (fGeom==0) AliFatal("Did not get geometry from EMCALLoader");
274 gMinuit = new TMinuit(100) ;
276 gMinuit->mncler(); // Reset Minuit's list of paramters
277 gMinuit->SetPrintLevel(-1) ; // No Printout
278 gMinuit->SetFCN(AliEMCALClusterizerv1::UnfoldingChiSquare) ;
279 // To set the address of the minimization function
280 TList * toMinuit = new TList();
281 toMinuit->AddAt(recPoint,0) ;
282 toMinuit->AddAt(fDigitsArr,1) ;
283 toMinuit->AddAt(fGeom,2) ;
285 gMinuit->SetObjectFit(toMinuit) ; // To tranfer pointer to UnfoldingChiSquare
287 // filling initial values for fit parameters
288 AliEMCALDigit * digit ;
292 Int_t nDigits = (Int_t) nPar / 3 ;
296 for(iDigit = 0; iDigit < nDigits; iDigit++){
297 digit = maxAt[iDigit];
302 fGeom->RelPosCellInSModule(digit->GetId(), y, x, z);
304 Float_t energy = maxAtEnergy[iDigit] ;
306 gMinuit->mnparm(index, "x", x, 0.1, 0, 0, ierflg) ;
309 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : x = %f", x ) ;
312 gMinuit->mnparm(index, "z", z, 0.1, 0, 0, ierflg) ;
315 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : z = %f", z) ;
318 gMinuit->mnparm(index, "Energy", energy , 0.05*energy, 0., 4.*energy, ierflg) ;
321 Error("FindFit", "EMCAL Unfolding Unable to set initial value for fit procedure : energy = %f", energy) ;
326 Double_t p0 = 0.1 ; // "Tolerance" Evaluation stops when EDM = 0.0001*p0 ;
327 // The number of function call slightly depends on it.
328 //Double_t p1 = 1.0 ;
331 gMinuit->mnexcm("SET STR", &p2, 0, ierflg) ; // force TMinuit to reduce function calls
332 // gMinuit->mnexcm("SET GRA", &p1, 1, ierflg) ; // force TMinuit to use my gradient
333 gMinuit->SetMaxIterations(5);
334 gMinuit->mnexcm("SET NOW", &p2 , 0, ierflg) ; // No Warnings
335 gMinuit->mnexcm("MIGRAD", &p0, 0, ierflg) ; // minimize
337 if(ierflg == 4){ // Minimum not found
338 Error("FindFit", "EMCAL Unfolding Fit not converged, cluster abandoned " ) ;
341 for(index = 0; index < nPar; index++){
344 gMinuit->GetParameter(index, val, err) ; // Returns value and error of parameter index
345 fitparameters[index] = val ;
353 //____________________________________________________________________________
354 void AliEMCALClusterizerv1::GetCalibrationParameters()
356 // Set calibration parameters:
357 // if calibration database exists, they are read from database,
358 // otherwise, they are taken from digitizer.
360 // It is a user responsilibity to open CDB before reconstruction,
362 // AliCDBStorage* storage = AliCDBManager::Instance()->GetStorage("local://CalibDB");
364 //Check if calibration is stored in data base
368 AliCDBEntry *entry = (AliCDBEntry*)
369 AliCDBManager::Instance()->Get("EMCAL/Calib/Data");
370 if (entry) fCalibData = (AliEMCALCalibData*) entry->GetObject();
374 AliFatal("Calibration parameters not found in CDB!");
378 //____________________________________________________________________________
379 void AliEMCALClusterizerv1::GetCaloCalibPedestal()
381 // Set calibration parameters:
382 // if calibration database exists, they are read from database,
383 // otherwise, they are taken from digitizer.
385 // It is a user responsilibity to open CDB before reconstruction,
387 // AliCDBStorage* storage = AliCDBManager::Instance()->GetStorage("local://CalibDB");
389 //Check if calibration is stored in data base
393 AliCDBEntry *entry = (AliCDBEntry*)
394 AliCDBManager::Instance()->Get("EMCAL/Calib/Pedestals");
395 if (entry) fCaloPed = (AliCaloCalibPedestal*) entry->GetObject();
399 AliFatal("Pedestal info not found in CDB!");
404 //____________________________________________________________________________
405 void AliEMCALClusterizerv1::Init()
407 // Make all memory allocations which can not be done in default constructor.
408 // Attach the Clusterizer task to the list of EMCAL tasks
410 AliRunLoader *rl = AliRunLoader::Instance();
411 if (rl->GetAliRun() && rl->GetAliRun()->GetDetector("EMCAL"))
412 fGeom = dynamic_cast<AliEMCAL*>(rl->GetAliRun()->GetDetector("EMCAL"))->GetGeometry();
414 fGeom = AliEMCALGeometry::GetInstance(AliEMCALGeometry::GetDefaultGeometryName());
416 AliDebug(1,Form("geom 0x%x",fGeom));
419 gMinuit = new TMinuit(100) ;
423 //____________________________________________________________________________
424 void AliEMCALClusterizerv1::InitParameters()
426 // Initializes the parameters for the Clusterizer
427 fNumberOfECAClusters = 0;
432 const AliEMCALRecParam* recParam = AliEMCALReconstructor::GetRecParam();
434 AliFatal("Reconstruction parameters for EMCAL not set!");
436 fECAClusteringThreshold = recParam->GetClusteringThreshold();
437 fECAW0 = recParam->GetW0();
438 fMinECut = recParam->GetMinECut();
439 fToUnfold = recParam->GetUnfold();
440 if(fToUnfold) AliWarning("Cluster Unfolding ON. Implementing only for eta=0 case!!!");
441 fECALocMaxCut = recParam->GetLocMaxCut();
442 fTimeCut = recParam->GetTimeCut();
443 fTimeMin = recParam->GetTimeMin();
444 fTimeMax = recParam->GetTimeMax();
446 AliDebug(1,Form("Reconstruction parameters: fECAClusteringThreshold=%.3f GeV, fECAW=%.3f, fMinECut=%.3f GeV, fToUnfold=%d, fECALocMaxCut=%.3f GeV, fTimeCut=%e s,fTimeMin=%e s,fTimeMax=%e s",
447 fECAClusteringThreshold,fECAW0,fMinECut,fToUnfold,fECALocMaxCut,fTimeCut, fTimeMin, fTimeMax));
452 //____________________________________________________________________________
453 Int_t AliEMCALClusterizerv1::AreNeighbours(AliEMCALDigit * d1, AliEMCALDigit * d2, Bool_t & shared) const
455 // Gives the neighbourness of two digits = 0 are not neighbour ; continue searching
457 // = 2 is in different SM; continue searching
458 // In case it is in different SM, but same phi rack, check if neigbours at eta=0
459 // neighbours are defined as digits having at least a common side
460 // The order of d1 and d2 is important: first (d1) should be a digit already in a cluster
461 // which is compared to a digit (d2) not yet in a cluster
463 static Int_t nSupMod1=0, nModule1=0, nIphi1=0, nIeta1=0, iphi1=0, ieta1=0;
464 static Int_t nSupMod2=0, nModule2=0, nIphi2=0, nIeta2=0, iphi2=0, ieta2=0;
465 static Int_t rowdiff, coldiff;
469 fGeom->GetCellIndex(d1->GetId(), nSupMod1,nModule1,nIphi1,nIeta1);
470 fGeom->GetCellIndex(d2->GetId(), nSupMod2,nModule2,nIphi2,nIeta2);
471 fGeom->GetCellPhiEtaIndexInSModule(nSupMod1,nModule1,nIphi1,nIeta1, iphi1,ieta1);
472 fGeom->GetCellPhiEtaIndexInSModule(nSupMod2,nModule2,nIphi2,nIeta2, iphi2,ieta2);
474 //If different SM, check if they are in the same phi, then consider cells close to eta=0 as neighbours; May 2010
475 if(nSupMod1 != nSupMod2 ) {
476 //Check if the 2 SM are in the same PHI position (0,1), (2,3), ...
477 Float_t smPhi1 = fGeom->GetEMCGeometry()->GetPhiCenterOfSM(nSupMod1);
478 Float_t smPhi2 = fGeom->GetEMCGeometry()->GetPhiCenterOfSM(nSupMod2);
480 if(!TMath::AreEqualAbs(smPhi1, smPhi2, 1e-3)) return 2; //Not phi rack equal, not neighbours
482 // In case of a shared cluster, index of SM in C side, columns start at 48 and ends at 48*2
483 // C Side impair SM, nSupMod%2=1; A side pair SM nSupMod%2=0
484 if(nSupMod1%2) ieta1+=AliEMCALGeoParams::fgkEMCALCols;
485 else ieta2+=AliEMCALGeoParams::fgkEMCALCols;
487 shared = kTRUE; // maybe a shared cluster, we know this later, set it for the moment.
489 }//Different SM, same phi
491 rowdiff = TMath::Abs(iphi1 - iphi2);
492 coldiff = TMath::Abs(ieta1 - ieta2) ;
494 // neighbours with at least common side; May 11, 2007
495 if ((coldiff==0 && TMath::Abs(rowdiff)==1) || (rowdiff==0 && TMath::Abs(coldiff)==1)) {
497 //if ((coldiff==0 && TMath::Abs(rowdiff==1)) || (rowdiff==0 && TMath::Abs(coldiff==1)) || (TMath::Abs(rowdiff)==1 && TMath::Abs(coldiff==1))) rv = 1;
500 printf("AliEMCALClusterizerv1::AreNeighbours(): id1=%d, (row %d, col %d) ; id2=%d, (row %d, col %d), shared %d \n",
501 d1->GetId(), iphi1,ieta1, d2->GetId(), iphi2,ieta2, shared);
511 //____________________________________________________________________________
512 void AliEMCALClusterizerv1::MakeClusters()
514 // Steering method to construct the clusters stored in a list of Reconstructed Points
515 // A cluster is defined as a list of neighbour digits
516 // Mar 03, 2007 by PAI
518 if (fGeom==0) AliFatal("Did not get geometry from EMCALLoader");
522 // Set up TObjArray with pointers to digits to work on
523 TObjArray *digitsC = new TObjArray();
524 TIter nextdigit(fDigitsArr);
525 AliEMCALDigit *digit;
526 while ( (digit = dynamic_cast<AliEMCALDigit*>(nextdigit())) ) {
527 digitsC->AddLast(digit);
530 double e = 0.0, ehs = 0.0;
531 TIter nextdigitC(digitsC);
532 while ( (digit = dynamic_cast<AliEMCALDigit *>(nextdigitC())) ) { // clean up digits
533 e = Calibrate(digit->GetAmplitude(), digit->GetTime(),digit->GetId());//Time or TimeR?
534 if ( e < fMinECut) //|| digit->GetTimeR() > fTimeCut ) // time window of cell checked in calibrate
535 digitsC->Remove(digit);
539 AliDebug(1,Form("MakeClusters: Number of digits %d -> (e %f), ehs %d\n",
540 fDigitsArr->GetEntries(),fMinECut,ehs));
544 while ( (digit = dynamic_cast<AliEMCALDigit *>(nextdigitC())) ) { // scan over the list of digitsC
545 TArrayI clusterECAdigitslist(fDigitsArr->GetEntries());
547 if(fGeom->CheckAbsCellId(digit->GetId()) && (Calibrate(digit->GetAmplitude(), digit->GetTime(),digit->GetId()) > fECAClusteringThreshold ) ){
548 // start a new Tower RecPoint
549 if(fNumberOfECAClusters >= fRecPoints->GetSize()) fRecPoints->Expand(2*fNumberOfECAClusters+1) ;
551 AliEMCALRecPoint *recPoint = new AliEMCALRecPoint("") ;
552 fRecPoints->AddAt(recPoint, fNumberOfECAClusters) ;
553 recPoint = dynamic_cast<AliEMCALRecPoint *>(fRecPoints->At(fNumberOfECAClusters)) ;
554 fNumberOfECAClusters++ ;
556 recPoint->SetClusterType(AliESDCaloCluster::kEMCALClusterv1);
558 recPoint->AddDigit(*digit, Calibrate(digit->GetAmplitude(), digit->GetTime(),digit->GetId()),kFALSE) ; //Time or TimeR?
559 TObjArray clusterDigits;
560 clusterDigits.AddLast(digit);
561 digitsC->Remove(digit) ;
563 AliDebug(1,Form("MakeClusters: OK id = %d, ene = %f , cell.th. = %f \n", digit->GetId(),
564 Calibrate(digit->GetAmplitude(),digit->GetTime(),digit->GetId()), fECAClusteringThreshold)); //Time or TimeR?
565 Float_t time = digit->GetTime();//Time or TimeR?
566 // Grow cluster by finding neighbours
567 TIter nextClusterDigit(&clusterDigits);
568 while ( (digit = dynamic_cast<AliEMCALDigit*>(nextClusterDigit())) ) { // scan over digits in cluster
569 TIter nextdigitN(digitsC);
570 AliEMCALDigit *digitN = 0; // digi neighbor
571 while ( (digitN = (AliEMCALDigit *)nextdigitN()) ) { // scan over all digits to look for neighbours
573 //Do not add digits with too different time
574 Bool_t shared = kFALSE;//cluster shared by 2 SuperModules?
575 if(TMath::Abs(time - digitN->GetTime()) > fTimeCut ) continue; //Time or TimeR?
576 if (AreNeighbours(digit, digitN, shared)==1) { // call (digit,digitN) in THAT order !!!!!
577 recPoint->AddDigit(*digitN, Calibrate(digitN->GetAmplitude(), digitN->GetTime(), digitN->GetId()),shared) ;//Time or TimeR?
578 clusterDigits.AddLast(digitN) ;
579 digitsC->Remove(digitN) ;
581 } // scan over digits
582 } // scan over digits already in cluster
585 AliDebug(2,Form("MakeClusters: %d digitd, energy %f \n", clusterDigits.GetEntries(), recPoint->GetEnergy()));
591 AliDebug(1,Form("total no of clusters %d from %d digits",fNumberOfECAClusters,fDigitsArr->GetEntriesFast()));
594 //____________________________________________________________________________
595 void AliEMCALClusterizerv1::MakeUnfolding()
597 // Unfolds clusters using the shape of an ElectroMagnetic shower
598 // Performs unfolding of all clusters
600 if(fNumberOfECAClusters > 0){
602 AliFatal("Did not get geometry from EMCALLoader") ;
603 Int_t nModulesToUnfold = fGeom->GetNCells();
605 Int_t numberofNotUnfolded = fNumberOfECAClusters ;
607 for(index = 0 ; index < numberofNotUnfolded ; index++){
609 AliEMCALRecPoint * recPoint = dynamic_cast<AliEMCALRecPoint *>( fRecPoints->At(index) ) ;
613 recPoint->GetGlobalPosition(gpos);
614 fGeom->GetAbsCellIdFromEtaPhi(gpos.Eta(),gpos.Phi(),absId);
615 if(absId > nModulesToUnfold)
618 Int_t nMultipl = recPoint->GetMultiplicity() ;
619 AliEMCALDigit ** maxAt = new AliEMCALDigit*[nMultipl] ;
620 Float_t * maxAtEnergy = new Float_t[nMultipl] ;
621 Int_t nMax = recPoint->GetNumberOfLocalMax(maxAt, maxAtEnergy,fECALocMaxCut,fDigitsArr) ;
623 if( nMax > 1 ) { // if cluster is very flat (no pronounced maximum) then nMax = 0
624 UnfoldCluster(recPoint, nMax, maxAt, maxAtEnergy) ;
625 fRecPoints->Remove(recPoint);
626 fRecPoints->Compress() ;
628 fNumberOfECAClusters-- ;
629 numberofNotUnfolded-- ;
632 recPoint->SetNExMax(1) ; //Only one local maximum
636 delete[] maxAtEnergy ;
639 // End of Unfolding of clusters
642 //____________________________________________________________________________
643 Double_t AliEMCALClusterizerv1::ShowerShape(Double_t x, Double_t y)
645 // Shape of the shower
646 // If you change this function, change also the gradient evaluation in ChiSquare()
648 Double_t r = sqrt(x*x+y*y);
649 Double_t r133 = TMath::Power(r, 1.33) ;
650 Double_t r669 = TMath::Power(r, 6.69) ;
651 Double_t shape = TMath::Exp( -r133 * (1. / (1.57 + 0.0860 * r133) - 0.55 / (1 + 0.000563 * r669) ) ) ;
655 //____________________________________________________________________________
656 void AliEMCALClusterizerv1::UnfoldCluster(AliEMCALRecPoint * iniTower,
658 AliEMCALDigit ** maxAt,
659 Float_t * maxAtEnergy)
661 // Performs the unfolding of a cluster with nMax overlapping showers
662 Int_t nPar = 3 * nMax ;
663 Float_t * fitparameters = new Float_t[nPar] ;
666 AliFatal("Did not get geometry from EMCALLoader") ;
668 Bool_t rv = FindFit(iniTower, maxAt, maxAtEnergy, nPar, fitparameters) ;
670 // Fit failed, return and remove cluster
671 iniTower->SetNExMax(-1) ;
672 delete[] fitparameters ;
676 // create unfolded rec points and fill them with new energy lists
677 // First calculate energy deposited in each sell in accordance with
678 // fit (without fluctuations): efit[]
679 // and later correct this number in acordance with actual energy
682 Int_t nDigits = iniTower->GetMultiplicity() ;
683 Float_t * efit = new Float_t[nDigits] ;
684 Double_t xDigit=0.,yDigit=0.,zDigit=0. ;
685 Float_t xpar=0.,zpar=0.,epar=0. ;
687 AliEMCALDigit * digit = 0 ;
688 Int_t * digitsList = iniTower->GetDigitsList() ;
692 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
693 digit = dynamic_cast<AliEMCALDigit*>( fDigitsArr->At(digitsList[iDigit] ) ) ;
694 fGeom->RelPosCellInSModule(digit->GetId(), yDigit, xDigit, zDigit);
698 while(iparam < nPar ){
699 xpar = fitparameters[iparam] ;
700 zpar = fitparameters[iparam+1] ;
701 epar = fitparameters[iparam+2] ;
703 efit[iDigit] += epar * ShowerShape(xDigit - xpar,zDigit - zpar) ;
708 // Now create new RecPoints and fill energy lists with efit corrected to fluctuations
709 // so that energy deposited in each cell is distributed between new clusters proportionally
710 // to its contribution to efit
712 Float_t * energiesList = iniTower->GetEnergiesList() ;
716 while(iparam < nPar ){
717 xpar = fitparameters[iparam] ;
718 zpar = fitparameters[iparam+1] ;
719 epar = fitparameters[iparam+2] ;
722 AliEMCALRecPoint * recPoint = 0 ;
724 if(fNumberOfECAClusters >= fRecPoints->GetSize())
725 fRecPoints->Expand(2*fNumberOfECAClusters) ;
727 (*fRecPoints)[fNumberOfECAClusters] = new AliEMCALRecPoint("") ;
728 recPoint = dynamic_cast<AliEMCALRecPoint *>( fRecPoints->At(fNumberOfECAClusters) ) ;
729 fNumberOfECAClusters++ ;
730 recPoint->SetNExMax((Int_t)nPar/3) ;
733 for(iDigit = 0 ; iDigit < nDigits ; iDigit ++){
734 digit = dynamic_cast<AliEMCALDigit*>( fDigitsArr->At( digitsList[iDigit] ) ) ;
735 fGeom->RelPosCellInSModule(digit->GetId(), yDigit, xDigit, zDigit);
737 ratio = epar * ShowerShape(xDigit - xpar,zDigit - zpar) / efit[iDigit] ;
738 eDigit = energiesList[iDigit] * ratio ;
739 recPoint->AddDigit( *digit, eDigit, kFALSE ) ; //FIXME, need to study the shared case
743 delete[] fitparameters ;
748 //_____________________________________________________________________________
749 void AliEMCALClusterizerv1::UnfoldingChiSquare(Int_t & nPar, Double_t * Grad,
751 Double_t * x, Int_t iflag)
753 // Calculates the Chi square for the cluster unfolding minimization
754 // Number of parameters, Gradient, Chi squared, parameters, what to do
756 TList * toMinuit = dynamic_cast<TList*>( gMinuit->GetObjectFit() ) ;
758 AliEMCALRecPoint * recPoint = dynamic_cast<AliEMCALRecPoint*>( toMinuit->At(0) ) ;
759 TClonesArray * digits = dynamic_cast<TClonesArray*>( toMinuit->At(1) ) ;
760 // A bit buggy way to get an access to the geometry
762 AliEMCALGeometry *geom = dynamic_cast<AliEMCALGeometry *>(toMinuit->At(2));
764 Int_t * digitsList = recPoint->GetDigitsList() ;
766 Int_t nOdigits = recPoint->GetDigitsMultiplicity() ;
768 Float_t * energiesList = recPoint->GetEnergiesList() ;
774 for(iparam = 0 ; iparam < nPar ; iparam++)
775 Grad[iparam] = 0 ; // Will evaluate gradient
779 AliEMCALDigit * digit ;
782 for( iDigit = 0 ; iDigit < nOdigits ; iDigit++) {
784 digit = dynamic_cast<AliEMCALDigit*>( digits->At( digitsList[iDigit] ) );
788 Double_t yDigit=0 ;//not used yet, assumed to be 0
790 geom->RelPosCellInSModule(digit->GetId(), yDigit, xDigit, zDigit);
792 if(iflag == 2){ // calculate gradient
795 while(iParam < nPar ){
796 Double_t dx = (xDigit - x[iParam]) ;
798 Double_t dz = (zDigit - x[iParam]) ;
800 efit += x[iParam] * ShowerShape(dx,dz) ;
803 Double_t sum = 2. * (efit - energiesList[iDigit]) / energiesList[iDigit] ; // Here we assume, that sigma = sqrt(E)
805 while(iParam < nPar ){
806 Double_t xpar = x[iParam] ;
807 Double_t zpar = x[iParam+1] ;
808 Double_t epar = x[iParam+2] ;
809 Double_t dr = TMath::Sqrt( (xDigit - xpar) * (xDigit - xpar) + (zDigit - zpar) * (zDigit - zpar) );
810 Double_t shape = sum * ShowerShape(xDigit - xpar,zDigit - zpar) ;
811 Double_t r133 = TMath::Power(dr, 1.33);
812 Double_t r669 = TMath::Power(dr,6.69);
813 Double_t deriv =-1.33 * TMath::Power(dr,0.33)*dr * ( 1.57 / ( (1.57 + 0.0860 * r133) * (1.57 + 0.0860 * r133) )
814 - 0.55 / (1 + 0.000563 * r669) / ( (1 + 0.000563 * r669) * (1 + 0.000563 * r669) ) ) ;
816 Grad[iParam] += epar * shape * deriv * (xpar - xDigit) ; // Derivative over x
818 Grad[iParam] += epar * shape * deriv * (zpar - zDigit) ; // Derivative over z
820 Grad[iParam] += shape ; // Derivative over energy
828 while(iparam < nPar ){
829 Double_t xpar = x[iparam] ;
830 Double_t zpar = x[iparam+1] ;
831 Double_t epar = x[iparam+2] ;
833 efit += epar * ShowerShape(xDigit - xpar,zDigit - zpar) ;
836 fret += (efit-energiesList[iDigit])*(efit-energiesList[iDigit])/energiesList[iDigit] ;
837 // Here we assume, that sigma = sqrt(E)
840 //____________________________________________________________________________
841 void AliEMCALClusterizerv1::Print(Option_t * /*option*/)const
843 // Print clusterizer parameters
845 TString message("\n") ;
847 if( strcmp(GetName(), "") !=0 ){
851 TString taskName(Version()) ;
853 printf("--------------- ");
854 printf("%s",taskName.Data()) ;
856 printf("Clusterizing digits: ");
857 printf("\n ECA Local Maximum cut = %f", fECALocMaxCut);
858 printf("\n ECA Logarithmic weight = %f", fECAW0);
860 printf("\nUnfolding on\n");
862 printf("\nUnfolding off\n");
864 printf("------------------------------------------------------------------");
867 printf("AliEMCALClusterizerv1 not initialized ") ;
870 //____________________________________________________________________________
871 void AliEMCALClusterizerv1::PrintRecPoints(Option_t * option)
873 // Prints list of RecPoints produced at the current pass of AliEMCALClusterizer
874 if(strstr(option,"deb")) {
875 printf("PrintRecPoints: Clusterization result:") ;
877 printf(" Found %d ECA Rec Points\n ",
878 fRecPoints->GetEntriesFast()) ;
881 if(strstr(option,"all")) {
882 if(strstr(option,"deb")) {
883 printf("\n-----------------------------------------------------------------------\n") ;
884 printf("Clusters in ECAL section\n") ;
885 printf("Index Ene(GeV) Multi Module GX GY GZ lX lY lZ Dispersion Lambda 1 Lambda 2 # of prim Primaries list\n") ;
889 for (index = 0 ; index < fRecPoints->GetEntries() ; index++) {
890 AliEMCALRecPoint * rp = dynamic_cast<AliEMCALRecPoint * >(fRecPoints->At(index)) ;
892 //rp->GetGlobalPosition(globalpos);
894 rp->GetLocalPosition(localpos);
896 rp->GetElipsAxis(lambda);
899 primaries = rp->GetPrimaries(nprimaries);
900 if(strstr(option,"deb"))
901 printf("\n%6d %8.4f %3d %4.1f %4.1f %4.1f %4.1f %4.1f %4.1f %4.1f %4f %4f %2d : ",
902 rp->GetIndexInList(), rp->GetEnergy(), rp->GetMultiplicity(),
903 globalpos.X(), globalpos.Y(), globalpos.Z(), localpos.X(), localpos.Y(), localpos.Z(),
904 rp->GetDispersion(), lambda[0], lambda[1], nprimaries) ;
905 if(strstr(option,"deb")){
906 for (Int_t iprimary=0; iprimary<nprimaries; iprimary++) {
907 printf("%d ", primaries[iprimary] ) ;
912 if(strstr(option,"deb"))
913 printf("\n-----------------------------------------------------------------------\n");
917 //___________________________________________________________________
918 void AliEMCALClusterizerv1::PrintRecoInfo()
920 printf(" AliEMCALClusterizerv1::PrintRecoInfo() : version %s \n", Version() );