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 **************************************************************************/
19 #include "AliMUONDigitizerV3.h"
22 #include "AliMUONCalibrationData.h"
23 #include "AliMUONConstants.h"
24 #include "AliMUONDigit.h"
25 #include "AliMUONLogger.h"
26 #include "AliMUONTriggerElectronics.h"
27 #include "AliMUONTriggerStoreV1.h"
28 #include "AliMUONVCalibParam.h"
29 #include "AliMUONVDigitStore.h"
30 #include "AliMUONGeometryTransformer.h" //ADDED for trigger noise
33 #include "AliMpSegmentation.h"
34 #include "AliMpCathodType.h"
35 #include "AliMpConstants.h"
36 #include "AliMpDEIterator.h"
37 #include "AliMpDEManager.h"
38 #include "AliMpIntPair.h"
40 #include "AliMpStationType.h"
41 #include "AliMpVSegmentation.h"
43 #include "AliCDBManager.h"
44 #include "AliCodeTimer.h"
47 #include "AliRunDigitizer.h"
48 #include "AliRunLoader.h"
50 #include <Riostream.h>
58 //-----------------------------------------------------------------------------
59 /// \class AliMUONDigitizerV3
60 /// The digitizer is performing the transformation to go from SDigits (digits
61 /// w/o any electronic noise) to Digits (w/ electronic noise, and decalibration)
63 /// The decalibration is performed by doing the reverse operation of the
64 /// calibration, that is we do (Signal+pedestal)/gain -> ADC
66 /// Note also that the digitizer takes care of merging sdigits that belongs
67 /// to the same pad, either because we're merging several input sdigit files
68 /// or with a single file because the sdigitizer does not merge sdigits itself
69 /// (for performance reason mainly, and because anyway we know we have to do it
70 /// here, at the digitization level).
72 /// \author Laurent Aphecetche
73 //-----------------------------------------------------------------------------
79 return static_cast<AliMUON*>(gAlice->GetModule("MUON"));
82 //ADDED for trigger noise
83 const AliMUONGeometryTransformer* GetTransformer()
85 return muon()->GetGeometryTransformer();
89 const Double_t AliMUONDigitizerV3::fgkNSigmas=3;
92 ClassImp(AliMUONDigitizerV3)
95 //_____________________________________________________________________________
96 AliMUONDigitizerV3::AliMUONDigitizerV3(AliRunDigitizer* manager,
97 Int_t generateNoisyDigits)
98 : AliDigitizer(manager),
99 fIsInitialized(kFALSE),
100 fCalibrationData(0x0),
101 fTriggerProcessor(0x0),
102 fNoiseFunctionTrig(0x0),
103 fGenerateNoisyDigits(generateNoisyDigits),
104 fLogger(new AliMUONLogger(1000)),
105 fTriggerStore(new AliMUONTriggerStoreV1),
107 fOutputDigitStore(0x0),
108 fInputDigitStore(0x0)
112 AliDebug(1,Form("AliRunDigitizer=%p",fManager));
116 //_____________________________________________________________________________
117 AliMUONDigitizerV3::~AliMUONDigitizerV3()
119 /// Dtor. Note we're the owner of some pointers.
123 // delete fCalibrationData;
124 delete fTriggerProcessor;
125 delete fNoiseFunctionTrig;
126 delete fTriggerStore;
128 delete fOutputDigitStore;
129 delete fInputDigitStore;
131 AliInfo("Summary of messages");
137 //_____________________________________________________________________________
139 AliMUONDigitizerV3::ApplyResponseToTrackerDigit(AliMUONVDigit& digit, Bool_t addNoise)
141 /// For tracking digits, starting from an ideal digit's charge, we :
143 /// - "divide" by a gain (thus decalibrating the digit)
144 /// - add a pedestal (thus decalibrating the digit)
145 /// - add some electronics noise (thus leading to a realistic adc), if requested to do so
146 /// - sets the signal to zero if below 3*sigma of the noise
148 Float_t charge = digit.Charge();
150 // We set the charge to 0, as the only relevant piece of information
151 // after Digitization is the ADC value.
154 Int_t detElemId = digit.DetElemId();
155 Int_t manuId = digit.ManuId();
157 AliMUONVCalibParam* pedestal = fCalibrationData->Pedestals(detElemId,manuId);
160 fLogger->Log(Form("%s:%d:Could not get pedestal for DE=%4d manuId=%4d. Disabling.",
167 AliMUONVCalibParam* gain = fCalibrationData->Gains(detElemId,manuId);
170 fLogger->Log(Form("%s:%d:Could not get gain for DE=%4d manuId=%4d. Disabling.",
177 Int_t manuChannel = digit.ManuChannel();
179 Int_t adc = DecalibrateTrackerDigit(*pedestal,*gain,manuChannel,charge,addNoise,
180 digit.IsNoiseOnly());
185 //_____________________________________________________________________________
187 AliMUONDigitizerV3::ApplyResponse(const AliMUONVDigitStore& store,
188 AliMUONVDigitStore& filteredStore)
190 /// Loop over all chamber digits, and apply the response to them
191 /// Note that this method may remove digits.
193 filteredStore.Clear();
195 const Bool_t kAddNoise = kTRUE;
197 TIter next(store.CreateIterator());
198 AliMUONVDigit* digit;
200 while ( ( digit = static_cast<AliMUONVDigit*>(next()) ) )
202 AliMp::StationType stationType = AliMpDEManager::GetStationType(digit->DetElemId());
204 if ( stationType != AliMp::kStationTrigger )
206 ApplyResponseToTrackerDigit(*digit,kAddNoise);
209 if ( digit->ADC() > 0 || digit->Charge() > 0 )
211 filteredStore.Add(*digit,AliMUONVDigitStore::kIgnore);
216 //_____________________________________________________________________________
218 AliMUONDigitizerV3::DecalibrateTrackerDigit(const AliMUONVCalibParam& pedestals,
219 const AliMUONVCalibParam& gains,
225 /// Decalibrate (i.e. go from charge to adc) a tracker digit, given its
226 /// pedestal and gain parameters.
227 /// Must insure before calling that channel is valid (i.e. between 0 and
228 /// pedestals or gains->GetSize()-1, but also corresponding to a valid channel
229 /// otherwise results are not predictible...)
231 static const Int_t kMaxADC = (1<<12)-1; // We code the charge on a 12 bits ADC.
233 Float_t pedestalMean = pedestals.ValueAsFloat(channel,0);
234 Float_t pedestalSigma = pedestals.ValueAsFloat(channel,1);
236 AliDebugClass(1,Form("DE %04d MANU %04d CH %02d PEDMEAN %7.2f PEDSIGMA %7.2f",
237 pedestals.ID0(),pedestals.ID1(),channel,pedestalMean,pedestalSigma));
239 Float_t a0 = gains.ValueAsFloat(channel,0);
240 Float_t a1 = gains.ValueAsFloat(channel,1);
241 Int_t thres = gains.ValueAsInt(channel,2);
242 Int_t qual = gains.ValueAsInt(channel,3);
243 if ( qual <= 0 ) return 0;
245 Float_t chargeThres = a0*thres;
247 Float_t padc(0); // (adc - ped) value
249 if ( charge <= chargeThres || TMath::Abs(a1) < 1E-12 )
253 if ( TMath::Abs(a0) > 1E-12 )
260 // linear + parabolic part
261 Double_t qt = chargeThres - charge;
262 Double_t delta = a0*a0-4*a1*qt;
265 AliErrorClass(Form("delta=%e DE %d Manu %d Channel %d "
266 " charge %e a0 %e a1 %e thres %d ped %e pedsig %e",
267 delta,pedestals.ID0(),pedestals.ID1(),
268 channel, charge, a0, a1, thres, pedestalMean,
273 delta = TMath::Sqrt(delta);
275 padc = ( ( -a0 + delta ) > 0 ? ( -a0 + delta ) : ( -a0 - delta ) );
281 if ( TMath::Abs(padc) > 1E-3)
283 // this is more than a precision problem : let's signal it !
284 AliErrorClass(Form("padc=%e DE %d Manu %d Channel %d "
285 " charge %e a0 %e a1 %e thres %d ped %e pedsig %e delta %e",
286 padc,pedestals.ID0(),pedestals.ID1(),
287 channel, charge, a0, a1, thres, pedestalMean,
288 pedestalSigma,delta));
291 // ok. consider we're just at thres, let it be zero.
302 Float_t adcNoise = 0.0;
308 adcNoise = NoiseFunction()->GetRandom()*pedestalSigma;
312 adcNoise = gRandom->Gaus(0.0,pedestalSigma);
316 adc = TMath::Nint(padc + pedestalMean + adcNoise + 0.5);
318 if ( adc < TMath::Nint(pedestalMean + fgkNSigmas*pedestalSigma + 0.5) )
323 // be sure we stick to 12 bits.
332 //_____________________________________________________________________________
334 AliMUONDigitizerV3::CreateInputDigitStore()
336 /// Create an input digit store, and check that all input files
337 /// actually contains the same type of AliMUONVDigitStore
339 fInputDigitStore = 0x0;
341 for ( Int_t iFile = 0; iFile < fManager->GetNinputs(); ++iFile )
343 AliLoader* inputLoader = GetLoader(fManager->GetInputFolderName(iFile));
345 inputLoader->LoadSDigits("READ");
347 TTree* iTreeS = inputLoader->TreeS();
350 AliFatal(Form("Could not get access to input file #%d",iFile));
353 AliMUONVDigitStore* inputStore = AliMUONVDigitStore::Create(*iTreeS);
355 if (!fInputDigitStore)
357 fInputDigitStore = inputStore;
361 if ( inputStore->IsA() != fInputDigitStore->IsA() )
363 AliFatal("Got different types of AliMUONVDigitStore here. Please implement me.");
369 //_____________________________________________________________________________
371 AliMUONDigitizerV3::Exec(Option_t*)
374 /// We first loop over input files, and merge the sdigits we found there.
375 /// Second, we digitize all the resulting sdigits
376 /// Then we generate noise-only digits (for tracker only)
377 /// And we finally generate the trigger outputs.
381 AliDebug(1, "Running digitizer.");
383 if ( fManager->GetNinputs() == 0 )
385 AliWarning("No input set. Nothing to do.");
389 if ( !fIsInitialized )
391 AliError("Not initialized. Cannot perform the work. Sorry");
395 Int_t nInputFiles = fManager->GetNinputs();
397 AliLoader* outputLoader = GetLoader(fManager->GetOutputFolderName());
399 outputLoader->MakeDigitsContainer();
401 TTree* oTreeD = outputLoader->TreeD();
405 AliFatal("Cannot create output TreeD");
408 // Loop over all the input files, and merge the sdigits found in those
411 for ( Int_t iFile = 0; iFile < nInputFiles; ++iFile )
413 AliLoader* inputLoader = GetLoader(fManager->GetInputFolderName(iFile));
415 inputLoader->LoadSDigits("READ");
417 TTree* iTreeS = inputLoader->TreeS();
420 AliFatal(Form("Could not get access to input file #%d",iFile));
423 if (!fInputDigitStore)
425 CreateInputDigitStore();
427 fInputDigitStore->Connect(*iTreeS);
431 MergeWithSDigits(fDigitStore,*fInputDigitStore,fManager->GetMask(iFile));
433 inputLoader->UnloadSDigits();
435 fInputDigitStore->Clear();
438 // At this point, we do have digit arrays (one per chamber) which contains
439 // the merging of all the sdigits of the input file(s).
440 // We now massage them to apply the detector response, i.e. this
441 // is here that we do the "digitization" work.
443 if (!fOutputDigitStore)
445 fOutputDigitStore = fDigitStore->Create();
448 if ( fGenerateNoisyDigits>=2 )
450 // Generate noise-only digits for trigger.
451 GenerateNoisyDigitsForTrigger(*fDigitStore);
454 ApplyResponse(*fDigitStore,*fOutputDigitStore);
456 if ( fGenerateNoisyDigits )
458 // Generate noise-only digits for tracker.
459 GenerateNoisyDigits(*fOutputDigitStore);
462 // We generate the global and local trigger decisions.
463 fTriggerProcessor->Digits2Trigger(*fOutputDigitStore,*fTriggerStore);
465 // Prepare output tree
466 Bool_t okD = fOutputDigitStore->Connect(*oTreeD,kFALSE);
467 Bool_t okT = fTriggerStore->Connect(*oTreeD,kFALSE);
470 AliError(Form("Could not make branch : Digit %d Trigger %d",okD,okT));
474 // Fill the output treeD
477 // Write to the output tree(D).
478 // Please note that as GlobalTrigger, LocalTrigger and Digits are in the same
479 // tree (=TreeD) in different branches, this WriteDigits in fact writes all of
481 outputLoader->WriteDigits("OVERWRITE");
483 outputLoader->UnloadDigits();
485 // Finally, we clean up after ourselves.
486 fTriggerStore->Clear();
487 fDigitStore->Clear();
488 fOutputDigitStore->Clear();
492 //_____________________________________________________________________________
494 AliMUONDigitizerV3::GenerateNoisyDigits(AliMUONVDigitStore& digitStore)
496 /// According to a given probability, generate digits that
497 /// have a signal above the noise cut (ped+n*sigma_ped), i.e. digits
498 /// that are "only noise".
502 for ( Int_t i = 0; i < AliMUONConstants::NTrackingCh(); ++i )
508 while ( !it.IsDone() )
510 for ( Int_t cathode = 0; cathode < 2; ++cathode )
512 GenerateNoisyDigitsForOneCathode(digitStore,it.CurrentDEId(),cathode);
519 //_____________________________________________________________________________
521 AliMUONDigitizerV3::GenerateNoisyDigitsForOneCathode(AliMUONVDigitStore& digitStore,
522 Int_t detElemId, Int_t cathode)
524 /// Generate noise-only digits for one cathode of one detection element.
525 /// Called by GenerateNoisyDigits()
527 const AliMpVSegmentation* seg
528 = AliMpSegmentation::Instance()->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
529 Int_t nofPads = seg->NofPads();
531 Int_t maxIx = seg->MaxPadIndexX();
532 Int_t maxIy = seg->MaxPadIndexY();
534 static const Double_t kProbToBeOutsideNsigmas = TMath::Erfc(fgkNSigmas/TMath::Sqrt(2.0)) / 2. ;
536 Int_t nofNoisyPads = TMath::Nint(kProbToBeOutsideNsigmas*nofPads);
537 if ( !nofNoisyPads ) return;
540 TMath::Nint(gRandom->Gaus(nofNoisyPads,
541 nofNoisyPads/TMath::Sqrt(nofNoisyPads)));
543 AliDebug(3,Form("DE %d cath %d nofNoisyPads %d",detElemId,cathode,nofNoisyPads));
545 for ( Int_t i = 0; i < nofNoisyPads; ++i )
552 ix = gRandom->Integer(maxIx+1);
553 iy = gRandom->Integer(maxIy+1);
554 pad = seg->PadByIndices(AliMpIntPair(ix,iy),kFALSE);
555 } while ( !pad.IsValid() );
557 Int_t manuId = pad.GetLocation().GetFirst();
558 Int_t manuChannel = pad.GetLocation().GetSecond();
560 AliMUONVCalibParam* pedestals = fCalibrationData->Pedestals(detElemId,manuId);
564 // no pedestal available for this channel, simply give up
568 AliMUONVDigit* d = digitStore.CreateDigit(detElemId,manuId,manuChannel,cathode);
572 d->SetCharge(0.0); // charge is zero, the ApplyResponseToTrackerDigit will add the noise
574 ApplyResponseToTrackerDigit(*d,kTRUE);
577 Bool_t ok = digitStore.Add(*d,AliMUONVDigitStore::kDeny);
578 // this can happen (that we randomly chose a digit that is
579 // already there). We simply ignore this, but log the occurence
580 // to cross-check that it's not too frequent.
583 fLogger->Log("Collision while adding noiseOnly digit");
587 fLogger->Log("Added noiseOnly digit");
592 AliError("Pure noise below threshold. This should not happen. Not adding "
600 //_____________________________________________________________________________
602 AliMUONDigitizerV3::GenerateNoisyDigitsForTrigger(AliMUONVDigitStore& digitStore)
604 /// Generate noise-only digits for one cathode of one detection element.
605 /// Called by GenerateNoisyDigits()
607 if ( !fNoiseFunctionTrig )
609 fNoiseFunctionTrig = new TF1("AliMUONDigitizerV3::fNoiseFunctionTrig","landau",
612 fNoiseFunctionTrig->SetParameters(3.91070e+02, 9.85026, 9.35881e-02);
616 AliMUONVDigit *d[2]={0x0};
618 for ( Int_t chamberId = AliMUONConstants::NTrackingCh(); chamberId < AliMUONConstants::NCh(); ++chamberId )
621 Int_t nofNoisyPads = 50;
623 Float_t r=-1, fi = 0., gx, gy, x, y, z, xg01, yg01, zg, xg02, yg02;
626 AliDebug(3,Form("Chamber %d nofNoisyPads %d",chamberId,nofNoisyPads));
628 for ( Int_t i = 0; i < nofNoisyPads; ++i )
630 //printf("Generating noise %i\n",i);
633 Bool_t isOk = kFALSE;
634 Int_t detElemId = -1;
636 //r = gRandom->Landau(9.85026, 9.35881e-02);
637 r = fNoiseFunctionTrig->GetRandom();
638 fi = 2. * TMath::Pi() * gRandom->Rndm();
639 //printf("r = %f\tfi = %f\n", r, fi);
640 gx = r * TMath::Cos(fi);
641 gy = r * TMath::Sin(fi);
643 for ( it.First(chamberId); ! it.IsDone(); it.Next() ){
644 Int_t currDetElemId = it.CurrentDEId();
645 const AliMpVSegmentation* seg
646 = AliMpSegmentation::Instance()->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(0));
648 Float_t deltax = seg->Dimensions().X();
649 Float_t deltay = seg->Dimensions().Y();
650 GetTransformer()->Local2Global(currDetElemId, -deltax, -deltay, 0, xg01, yg01, zg);
651 GetTransformer()->Local2Global(currDetElemId, deltax, deltay, 0, xg02, yg02, zg);
652 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
661 if(gx>=xg1 && gx<=xg2 && gy>=yg1 && gy<=yg2){
662 detElemId = currDetElemId;
663 GetTransformer()->Global2Local(detElemId, gx, gy, 0, x, y, z);
664 pad[0] = seg->PadByPosition(TVector2(x,y),kFALSE);
665 if(!pad[0].IsValid()) continue;
672 const AliMpVSegmentation* seg1
673 = AliMpSegmentation::Instance()->GetMpSegmentation(detElemId,AliMp::GetCathodType(1));
674 pad[1] = seg1->PadByPosition(TVector2(x,y),kFALSE);
676 for ( Int_t cathode = 0; cathode < 2; ++cathode ){
677 Int_t manuId = pad[cathode].GetLocation(0).GetFirst();
678 Int_t manuChannel = pad[cathode].GetLocation(0).GetSecond();
679 d[cathode] = digitStore.CreateDigit(detElemId,manuId,manuChannel,cathode);
680 ix = pad[cathode].GetIndices().GetFirst();
681 iy = pad[cathode].GetIndices().GetSecond();
682 d[cathode]->SetPadXY(ix,iy);
683 //d[cathode].SetSignal(1);
684 //d[cathode].SetPhysicsSignal(0);
685 d[cathode]->SetCharge(1);
686 d[cathode]->NoiseOnly(kTRUE);
687 AliDebug(3,Form("Adding a pure noise digit :"));
689 Bool_t ok = digitStore.Add(*d[cathode],AliMUONVDigitStore::kDeny);
692 fLogger->Log("Collision while adding TriggerNoise digit");
696 fLogger->Log("Added triggerNoise digit");
699 } // loop on noisy pads
700 } // loop on chambers
704 //_____________________________________________________________________________
706 AliMUONDigitizerV3::GetLoader(const TString& folderName)
708 /// Get a MUON loader
710 AliDebug(2,Form("Getting access to folder %s",folderName.Data()));
711 AliLoader* loader = AliRunLoader::GetDetectorLoader("MUON",folderName.Data());
714 AliError(Form("Could not get MuonLoader from folder %s",folderName.Data()));
720 //_____________________________________________________________________________
722 AliMUONDigitizerV3::Init()
724 /// Initialization of the TTask :
725 /// a) create the calibrationData, according to run number
726 /// b) create the trigger processing task
730 if ( fIsInitialized )
732 AliError("Object already initialized.");
738 AliError("fManager is null !");
743 if ( ! AliMpCDB::LoadDDLStore() ) {
744 AliFatal("Could not access mapping from OCDB !");
747 if (!fCalibrationData)
748 AliFatal("Calibration data object not defined");
750 if ( !fCalibrationData->Pedestals() )
752 AliFatal("Could not access pedestals from OCDB !");
754 if ( !fCalibrationData->Gains() )
756 AliFatal("Could not access gains from OCDB !");
760 AliInfo("Using trigger configuration from CDB");
762 fTriggerProcessor = new AliMUONTriggerElectronics(fCalibrationData);
764 AliDebug(1, Form("Will %s generate noise-only digits for tracker",
765 (fGenerateNoisyDigits ? "":"NOT")));
767 fIsInitialized = kTRUE;
771 //_____________________________________________________________________________
773 AliMUONDigitizerV3::MergeWithSDigits(AliMUONVDigitStore*& outputStore,
774 const AliMUONVDigitStore& input,
777 /// Merge the sdigits in inputData with the digits already present in outputData
779 if ( !outputStore ) outputStore = input.Create();
781 TIter next(input.CreateIterator());
782 AliMUONVDigit* sdigit;
784 while ( ( sdigit = static_cast<AliMUONVDigit*>(next()) ) )
786 // Update the track references using the mask.
787 // FIXME: this is dirty, for backward compatibility only.
788 // Should re-design all this way of keeping track of MC information...
789 if ( mask ) sdigit->PatchTracks(mask);
790 // Then add or update the digit to the output.
791 AliMUONVDigit* added = outputStore->Add(*sdigit,AliMUONVDigitStore::kMerge);
794 AliError("Could not add digit in merge mode");
799 //_____________________________________________________________________________
801 AliMUONDigitizerV3::NoiseFunction()
803 /// Return noise function
807 f = new TF1("AliMUONDigitizerV3::NoiseFunction","gaus",fgkNSigmas,fgkNSigmas*10);
808 f->SetParameters(1,0,1);