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"
39 #include "AliMpStationType.h"
40 #include "AliMpVSegmentation.h"
42 #include "AliCDBManager.h"
43 #include "AliCodeTimer.h"
46 #include "AliRunDigitizer.h"
47 #include "AliRunLoader.h"
49 #include <Riostream.h>
57 //-----------------------------------------------------------------------------
58 /// \class AliMUONDigitizerV3
59 /// The digitizer is performing the transformation to go from SDigits (digits
60 /// w/o any electronic noise) to Digits (w/ electronic noise, and decalibration)
62 /// The decalibration is performed by doing the reverse operation of the
63 /// calibration, that is we do (Signal+pedestal)/gain -> ADC
65 /// Note also that the digitizer takes care of merging sdigits that belongs
66 /// to the same pad, either because we're merging several input sdigit files
67 /// or with a single file because the sdigitizer does not merge sdigits itself
68 /// (for performance reason mainly, and because anyway we know we have to do it
69 /// here, at the digitization level).
71 /// \author Laurent Aphecetche
72 //-----------------------------------------------------------------------------
78 return static_cast<AliMUON*>(gAlice->GetModule("MUON"));
81 //ADDED for trigger noise
82 const AliMUONGeometryTransformer* GetTransformer()
84 return muon()->GetGeometryTransformer();
88 const Double_t AliMUONDigitizerV3::fgkNSigmas=3;
91 ClassImp(AliMUONDigitizerV3)
94 //_____________________________________________________________________________
95 AliMUONDigitizerV3::AliMUONDigitizerV3(AliRunDigitizer* manager,
96 Int_t generateNoisyDigits)
97 : AliDigitizer(manager),
98 fIsInitialized(kFALSE),
99 fCalibrationData(0x0),
100 fTriggerProcessor(0x0),
101 fNoiseFunctionTrig(0x0),
102 fGenerateNoisyDigits(generateNoisyDigits),
103 fLogger(new AliMUONLogger(1000)),
104 fTriggerStore(new AliMUONTriggerStoreV1),
106 fOutputDigitStore(0x0),
107 fInputDigitStore(0x0)
111 AliDebug(1,Form("AliRunDigitizer=%p",fManager));
115 //_____________________________________________________________________________
116 AliMUONDigitizerV3::~AliMUONDigitizerV3()
118 /// Dtor. Note we're the owner of some pointers.
122 // delete fCalibrationData;
123 delete fTriggerProcessor;
124 delete fNoiseFunctionTrig;
125 delete fTriggerStore;
127 delete fOutputDigitStore;
128 delete fInputDigitStore;
130 AliInfo("Summary of messages");
136 //_____________________________________________________________________________
138 AliMUONDigitizerV3::ApplyResponseToTrackerDigit(AliMUONVDigit& digit, Bool_t addNoise)
140 /// For tracking digits, starting from an ideal digit's charge, we :
142 /// - "divide" by a gain (thus decalibrating the digit)
143 /// - add a pedestal (thus decalibrating the digit)
144 /// - add some electronics noise (thus leading to a realistic adc), if requested to do so
145 /// - sets the signal to zero if below 3*sigma of the noise
147 Float_t charge = digit.Charge();
149 // We set the charge to 0, as the only relevant piece of information
150 // after Digitization is the ADC value.
153 Int_t detElemId = digit.DetElemId();
154 Int_t manuId = digit.ManuId();
156 AliMUONVCalibParam* pedestal = fCalibrationData->Pedestals(detElemId,manuId);
159 fLogger->Log(Form("%s:%d:Could not get pedestal for DE=%4d manuId=%4d. Disabling.",
166 Int_t manuChannel = digit.ManuChannel();
168 if ( pedestal->ValueAsFloat(manuChannel,0) == AliMUONVCalibParam::InvalidFloatValue() ||
169 pedestal->ValueAsFloat(manuChannel,1) == AliMUONVCalibParam::InvalidFloatValue() )
171 // protection against invalid pedestal value
176 AliMUONVCalibParam* gain = fCalibrationData->Gains(detElemId,manuId);
179 fLogger->Log(Form("%s:%d:Could not get gain for DE=%4d manuId=%4d. Disabling.",
186 Int_t adc = DecalibrateTrackerDigit(*pedestal,*gain,manuChannel,charge,addNoise,
187 digit.IsNoiseOnly());
192 //_____________________________________________________________________________
194 AliMUONDigitizerV3::ApplyResponse(const AliMUONVDigitStore& store,
195 AliMUONVDigitStore& filteredStore)
197 /// Loop over all chamber digits, and apply the response to them
198 /// Note that this method may remove digits.
200 filteredStore.Clear();
202 const Bool_t kAddNoise = kTRUE;
204 TIter next(store.CreateIterator());
205 AliMUONVDigit* digit;
207 while ( ( digit = static_cast<AliMUONVDigit*>(next()) ) )
209 AliMp::StationType stationType = AliMpDEManager::GetStationType(digit->DetElemId());
211 if ( stationType != AliMp::kStationTrigger )
213 ApplyResponseToTrackerDigit(*digit,kAddNoise);
216 if ( digit->ADC() > 0 || digit->Charge() > 0 )
218 filteredStore.Add(*digit,AliMUONVDigitStore::kIgnore);
223 //_____________________________________________________________________________
225 AliMUONDigitizerV3::DecalibrateTrackerDigit(const AliMUONVCalibParam& pedestals,
226 const AliMUONVCalibParam& gains,
232 /// Decalibrate (i.e. go from charge to adc) a tracker digit, given its
233 /// pedestal and gain parameters.
234 /// Must insure before calling that channel is valid (i.e. between 0 and
235 /// pedestals or gains->GetSize()-1, but also corresponding to a valid channel
236 /// otherwise results are not predictible...)
238 static const Int_t kMaxADC = (1<<12)-1; // We code the charge on a 12 bits ADC.
240 Float_t pedestalMean = pedestals.ValueAsFloat(channel,0);
241 Float_t pedestalSigma = pedestals.ValueAsFloat(channel,1);
243 AliDebugClass(1,Form("DE %04d MANU %04d CH %02d PEDMEAN %7.2f PEDSIGMA %7.2f",
244 pedestals.ID0(),pedestals.ID1(),channel,pedestalMean,pedestalSigma));
246 Float_t a0 = gains.ValueAsFloat(channel,0);
247 Float_t a1 = gains.ValueAsFloat(channel,1);
248 Int_t thres = gains.ValueAsInt(channel,2);
249 Int_t qual = gains.ValueAsInt(channel,3);
250 if ( qual <= 0 ) return 0;
252 Float_t chargeThres = a0*thres;
254 Float_t padc(0); // (adc - ped) value
256 if ( charge <= chargeThres || TMath::Abs(a1) < 1E-12 )
260 if ( TMath::Abs(a0) > 1E-12 )
267 // linear + parabolic part
268 Double_t qt = chargeThres - charge;
269 Double_t delta = a0*a0-4*a1*qt;
272 AliErrorClass(Form("delta=%e DE %d Manu %d Channel %d "
273 " charge %e a0 %e a1 %e thres %d ped %e pedsig %e",
274 delta,pedestals.ID0(),pedestals.ID1(),
275 channel, charge, a0, a1, thres, pedestalMean,
280 delta = TMath::Sqrt(delta);
282 padc = ( ( -a0 + delta ) > 0 ? ( -a0 + delta ) : ( -a0 - delta ) );
288 if ( TMath::Abs(padc) > 1E-3)
290 // this is more than a precision problem : let's signal it !
291 AliErrorClass(Form("padc=%e DE %d Manu %d Channel %d "
292 " charge %e a0 %e a1 %e thres %d ped %e pedsig %e delta %e",
293 padc,pedestals.ID0(),pedestals.ID1(),
294 channel, charge, a0, a1, thres, pedestalMean,
295 pedestalSigma,delta));
298 // ok. consider we're just at thres, let it be zero.
309 Float_t adcNoise = 0.0;
315 adcNoise = NoiseFunction()->GetRandom()*pedestalSigma;
319 adcNoise = gRandom->Gaus(0.0,pedestalSigma);
323 adc = TMath::Nint(padc + pedestalMean + adcNoise + 0.5);
325 if ( adc < TMath::Nint(pedestalMean + fgkNSigmas*pedestalSigma + 0.5) )
330 // be sure we stick to 12 bits.
339 //_____________________________________________________________________________
341 AliMUONDigitizerV3::CreateInputDigitStore()
343 /// Create an input digit store, and check that all input files
344 /// actually contains the same type of AliMUONVDigitStore
346 fInputDigitStore = 0x0;
348 for ( Int_t iFile = 0; iFile < fManager->GetNinputs(); ++iFile )
350 AliLoader* inputLoader = GetLoader(fManager->GetInputFolderName(iFile));
352 inputLoader->LoadSDigits("READ");
354 TTree* iTreeS = inputLoader->TreeS();
357 AliFatal(Form("Could not get access to input file #%d",iFile));
360 AliMUONVDigitStore* inputStore = AliMUONVDigitStore::Create(*iTreeS);
362 if (!fInputDigitStore)
364 fInputDigitStore = inputStore;
368 if ( inputStore->IsA() != fInputDigitStore->IsA() )
370 AliFatal("Got different types of AliMUONVDigitStore here. Please implement me.");
376 //_____________________________________________________________________________
378 AliMUONDigitizerV3::Exec(Option_t*)
381 /// We first loop over input files, and merge the sdigits we found there.
382 /// Second, we digitize all the resulting sdigits
383 /// Then we generate noise-only digits (for tracker only)
384 /// And we finally generate the trigger outputs.
386 AliCodeTimerAuto("",0)
388 AliDebug(1, "Running digitizer.");
390 if ( fManager->GetNinputs() == 0 )
392 AliWarning("No input set. Nothing to do.");
396 if ( !fIsInitialized )
398 AliError("Not initialized. Cannot perform the work. Sorry");
402 Int_t nInputFiles = fManager->GetNinputs();
404 AliLoader* outputLoader = GetLoader(fManager->GetOutputFolderName());
406 outputLoader->MakeDigitsContainer();
408 TTree* oTreeD = outputLoader->TreeD();
412 AliFatal("Cannot create output TreeD");
415 // Loop over all the input files, and merge the sdigits found in those
418 for ( Int_t iFile = 0; iFile < nInputFiles; ++iFile )
420 AliLoader* inputLoader = GetLoader(fManager->GetInputFolderName(iFile));
422 inputLoader->LoadSDigits("READ");
424 TTree* iTreeS = inputLoader->TreeS();
427 AliFatal(Form("Could not get access to input file #%d",iFile));
430 if (!fInputDigitStore)
432 CreateInputDigitStore();
434 fInputDigitStore->Connect(*iTreeS);
438 MergeWithSDigits(fDigitStore,*fInputDigitStore,fManager->GetMask(iFile));
440 inputLoader->UnloadSDigits();
442 fInputDigitStore->Clear();
445 // At this point, we do have digit arrays (one per chamber) which contains
446 // the merging of all the sdigits of the input file(s).
447 // We now massage them to apply the detector response, i.e. this
448 // is here that we do the "digitization" work.
450 if (!fOutputDigitStore)
452 fOutputDigitStore = fDigitStore->Create();
455 if ( fGenerateNoisyDigits>=2 )
457 // Generate noise-only digits for trigger.
458 GenerateNoisyDigitsForTrigger(*fDigitStore);
461 ApplyResponse(*fDigitStore,*fOutputDigitStore);
463 if ( fGenerateNoisyDigits )
465 // Generate noise-only digits for tracker.
466 GenerateNoisyDigits(*fOutputDigitStore);
469 // We generate the global and local trigger decisions.
470 fTriggerProcessor->Digits2Trigger(*fOutputDigitStore,*fTriggerStore);
472 // Prepare output tree
473 Bool_t okD = fOutputDigitStore->Connect(*oTreeD,kFALSE);
474 Bool_t okT = fTriggerStore->Connect(*oTreeD,kFALSE);
477 AliError(Form("Could not make branch : Digit %d Trigger %d",okD,okT));
481 // Fill the output treeD
484 // Write to the output tree(D).
485 // Please note that as GlobalTrigger, LocalTrigger and Digits are in the same
486 // tree (=TreeD) in different branches, this WriteDigits in fact writes all of
488 outputLoader->WriteDigits("OVERWRITE");
490 outputLoader->UnloadDigits();
492 // Finally, we clean up after ourselves.
493 fTriggerStore->Clear();
494 fDigitStore->Clear();
495 fOutputDigitStore->Clear();
499 //_____________________________________________________________________________
501 AliMUONDigitizerV3::GenerateNoisyDigits(AliMUONVDigitStore& digitStore)
503 /// According to a given probability, generate digits that
504 /// have a signal above the noise cut (ped+n*sigma_ped), i.e. digits
505 /// that are "only noise".
507 AliCodeTimerAuto("",0)
509 for ( Int_t i = 0; i < AliMUONConstants::NTrackingCh(); ++i )
515 while ( !it.IsDone() )
517 for ( Int_t cathode = 0; cathode < 2; ++cathode )
519 GenerateNoisyDigitsForOneCathode(digitStore,it.CurrentDEId(),cathode);
526 //_____________________________________________________________________________
528 AliMUONDigitizerV3::GenerateNoisyDigitsForOneCathode(AliMUONVDigitStore& digitStore,
529 Int_t detElemId, Int_t cathode)
531 /// Generate noise-only digits for one cathode of one detection element.
532 /// Called by GenerateNoisyDigits()
534 const AliMpVSegmentation* seg
535 = AliMpSegmentation::Instance()->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
536 Int_t nofPads = seg->NofPads();
538 Int_t maxIx = seg->MaxPadIndexX();
539 Int_t maxIy = seg->MaxPadIndexY();
541 static const Double_t kProbToBeOutsideNsigmas = TMath::Erfc(fgkNSigmas/TMath::Sqrt(2.0)) / 2. ;
543 Int_t nofNoisyPads = TMath::Nint(kProbToBeOutsideNsigmas*nofPads);
544 if ( !nofNoisyPads ) return;
547 TMath::Nint(gRandom->Gaus(nofNoisyPads,
548 nofNoisyPads/TMath::Sqrt(nofNoisyPads)));
550 AliDebug(3,Form("DE %d cath %d nofNoisyPads %d",detElemId,cathode,nofNoisyPads));
552 for ( Int_t i = 0; i < nofNoisyPads; ++i )
559 ix = gRandom->Integer(maxIx+1);
560 iy = gRandom->Integer(maxIy+1);
561 pad = seg->PadByIndices(ix,iy,kFALSE);
562 } while ( !pad.IsValid() );
564 Int_t manuId = pad.GetManuId();
565 Int_t manuChannel = pad.GetManuChannel();
567 AliMUONVCalibParam* pedestals = fCalibrationData->Pedestals(detElemId,manuId);
571 // no pedestal available for this channel, simply give up
575 AliMUONVDigit* d = digitStore.CreateDigit(detElemId,manuId,manuChannel,cathode);
579 d->SetCharge(0.0); // charge is zero, the ApplyResponseToTrackerDigit will add the noise
581 ApplyResponseToTrackerDigit(*d,kTRUE);
584 Bool_t ok = digitStore.Add(*d,AliMUONVDigitStore::kDeny);
585 // this can happen (that we randomly chose a digit that is
586 // already there). We simply ignore this, but log the occurence
587 // to cross-check that it's not too frequent.
590 fLogger->Log("Collision while adding noiseOnly digit");
594 fLogger->Log("Added noiseOnly digit");
602 //_____________________________________________________________________________
604 AliMUONDigitizerV3::GenerateNoisyDigitsForTrigger(AliMUONVDigitStore& digitStore)
606 /// Generate noise-only digits for one cathode of one detection element.
607 /// Called by GenerateNoisyDigits()
609 if ( !fNoiseFunctionTrig )
611 fNoiseFunctionTrig = new TF1("AliMUONDigitizerV3::fNoiseFunctionTrig","landau",
614 fNoiseFunctionTrig->SetParameters(3.91070e+02, 9.85026, 9.35881e-02);
618 AliMUONVDigit *d[2]={0x0};
620 for ( Int_t chamberId = AliMUONConstants::NTrackingCh(); chamberId < AliMUONConstants::NCh(); ++chamberId )
623 Int_t nofNoisyPads = 50;
625 Float_t r=-1, fi = 0., gx, gy, x, y, z, xg01, yg01, zg, xg02, yg02;
628 AliDebug(3,Form("Chamber %d nofNoisyPads %d",chamberId,nofNoisyPads));
630 for ( Int_t i = 0; i < nofNoisyPads; ++i )
632 //printf("Generating noise %i\n",i);
635 Bool_t isOk = kFALSE;
636 Int_t detElemId = -1;
638 //r = gRandom->Landau(9.85026, 9.35881e-02);
639 r = fNoiseFunctionTrig->GetRandom();
640 fi = 2. * TMath::Pi() * gRandom->Rndm();
641 //printf("r = %f\tfi = %f\n", r, fi);
642 gx = r * TMath::Cos(fi);
643 gy = r * TMath::Sin(fi);
645 for ( it.First(chamberId); ! it.IsDone(); it.Next() ){
646 Int_t currDetElemId = it.CurrentDEId();
647 const AliMpVSegmentation* seg
648 = AliMpSegmentation::Instance()->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(0));
650 Float_t deltax = seg->GetDimensionX();
651 Float_t deltay = seg->GetDimensionY();
652 GetTransformer()->Local2Global(currDetElemId, -deltax, -deltay, 0, xg01, yg01, zg);
653 GetTransformer()->Local2Global(currDetElemId, deltax, deltay, 0, xg02, yg02, zg);
654 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
663 if(gx>=xg1 && gx<=xg2 && gy>=yg1 && gy<=yg2){
664 detElemId = currDetElemId;
665 GetTransformer()->Global2Local(detElemId, gx, gy, 0, x, y, z);
666 pad[0] = seg->PadByPosition(x,y,kFALSE);
667 if(!pad[0].IsValid()) continue;
674 const AliMpVSegmentation* seg1
675 = AliMpSegmentation::Instance()->GetMpSegmentation(detElemId,AliMp::GetCathodType(1));
676 pad[1] = seg1->PadByPosition(x,y,kFALSE);
678 for ( Int_t cathode = 0; cathode < 2; ++cathode ){
679 Int_t manuId = pad[cathode].GetLocalBoardId(0);
680 Int_t manuChannel = pad[cathode].GetLocalBoardChannel(0);
681 d[cathode] = digitStore.CreateDigit(detElemId,manuId,manuChannel,cathode);
682 ix = pad[cathode].GetIx();
683 iy = pad[cathode].GetIy();
684 d[cathode]->SetPadXY(ix,iy);
685 //d[cathode].SetSignal(1);
686 //d[cathode].SetPhysicsSignal(0);
687 d[cathode]->SetCharge(1);
688 d[cathode]->NoiseOnly(kTRUE);
689 AliDebug(3,Form("Adding a pure noise digit :"));
691 Bool_t ok = digitStore.Add(*d[cathode],AliMUONVDigitStore::kDeny);
694 fLogger->Log("Collision while adding TriggerNoise digit");
698 fLogger->Log("Added triggerNoise digit");
701 } // loop on noisy pads
702 } // loop on chambers
706 //_____________________________________________________________________________
708 AliMUONDigitizerV3::GetLoader(const TString& folderName)
710 /// Get a MUON loader
712 AliDebug(2,Form("Getting access to folder %s",folderName.Data()));
713 AliLoader* loader = AliRunLoader::GetDetectorLoader("MUON",folderName.Data());
716 AliError(Form("Could not get MuonLoader from folder %s",folderName.Data()));
722 //_____________________________________________________________________________
724 AliMUONDigitizerV3::Init()
726 /// Initialization of the TTask :
727 /// a) create the calibrationData, according to run number
728 /// b) create the trigger processing task
732 if ( fIsInitialized )
734 AliError("Object already initialized.");
740 AliError("fManager is null !");
745 if ( ! AliMpCDB::LoadDDLStore() ) {
746 AliFatal("Could not access mapping from OCDB !");
749 if (!fCalibrationData)
750 AliFatal("Calibration data object not defined");
752 if ( !fCalibrationData->Pedestals() )
754 AliFatal("Could not access pedestals from OCDB !");
756 if ( !fCalibrationData->Gains() )
758 AliFatal("Could not access gains from OCDB !");
762 AliInfo("Using trigger configuration from CDB");
764 fTriggerProcessor = new AliMUONTriggerElectronics(fCalibrationData);
766 AliDebug(1, Form("Will %s generate noise-only digits for tracker",
767 (fGenerateNoisyDigits ? "":"NOT")));
769 fIsInitialized = kTRUE;
773 //_____________________________________________________________________________
775 AliMUONDigitizerV3::MergeWithSDigits(AliMUONVDigitStore*& outputStore,
776 const AliMUONVDigitStore& input,
779 /// Merge the sdigits in inputData with the digits already present in outputData
781 if ( !outputStore ) outputStore = input.Create();
783 TIter next(input.CreateIterator());
784 AliMUONVDigit* sdigit;
786 while ( ( sdigit = static_cast<AliMUONVDigit*>(next()) ) )
788 // Update the track references using the mask.
789 // FIXME: this is dirty, for backward compatibility only.
790 // Should re-design all this way of keeping track of MC information...
791 if ( mask ) sdigit->PatchTracks(mask);
792 // Then add or update the digit to the output.
793 AliMUONVDigit* added = outputStore->Add(*sdigit,AliMUONVDigitStore::kMerge);
796 AliError("Could not add digit in merge mode");
801 //_____________________________________________________________________________
803 AliMUONDigitizerV3::NoiseFunction()
805 /// Return noise function
809 f = new TF1("AliMUONDigitizerV3::NoiseFunction","gaus",fgkNSigmas,fgkNSigmas*10);
810 f->SetParameters(1,0,1);