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)
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;
129 AliInfo("Summary of messages");
135 //_____________________________________________________________________________
137 AliMUONDigitizerV3::ApplyResponseToTrackerDigit(AliMUONVDigit& digit, Bool_t addNoise)
139 /// For tracking digits, starting from an ideal digit's charge, we :
141 /// - "divide" by a gain (thus decalibrating the digit)
142 /// - add a pedestal (thus decalibrating the digit)
143 /// - add some electronics noise (thus leading to a realistic adc), if requested to do so
144 /// - sets the signal to zero if below 3*sigma of the noise
146 Float_t charge = digit.Charge();
148 // We set the charge to 0, as the only relevant piece of information
149 // after Digitization is the ADC value.
152 Int_t detElemId = digit.DetElemId();
153 Int_t manuId = digit.ManuId();
155 AliMUONVCalibParam* pedestal = fCalibrationData->Pedestals(detElemId,manuId);
158 fLogger->Log(Form("%s:%d:Could not get pedestal for DE=%4d manuId=%4d. Disabling.",
165 AliMUONVCalibParam* gain = fCalibrationData->Gains(detElemId,manuId);
168 fLogger->Log(Form("%s:%d:Could not get gain for DE=%4d manuId=%4d. Disabling.",
175 Int_t manuChannel = digit.ManuChannel();
177 Int_t adc = DecalibrateTrackerDigit(*pedestal,*gain,manuChannel,charge,addNoise,
178 digit.IsNoiseOnly());
183 //_____________________________________________________________________________
185 AliMUONDigitizerV3::ApplyResponse(const AliMUONVDigitStore& store,
186 AliMUONVDigitStore& filteredStore)
188 /// Loop over all chamber digits, and apply the response to them
189 /// Note that this method may remove digits.
191 filteredStore.Clear();
193 const Bool_t kAddNoise = kTRUE;
195 TIter next(store.CreateIterator());
196 AliMUONVDigit* digit;
198 while ( ( digit = static_cast<AliMUONVDigit*>(next()) ) )
200 AliMp::StationType stationType = AliMpDEManager::GetStationType(digit->DetElemId());
202 if ( stationType != AliMp::kStationTrigger )
204 ApplyResponseToTrackerDigit(*digit,kAddNoise);
207 if ( digit->ADC() > 0 || digit->Charge() > 0 )
209 filteredStore.Add(*digit,AliMUONVDigitStore::kIgnore);
214 //_____________________________________________________________________________
216 AliMUONDigitizerV3::DecalibrateTrackerDigit(const AliMUONVCalibParam& pedestals,
217 const AliMUONVCalibParam& gains,
223 /// Decalibrate (i.e. go from charge to adc) a tracker digit, given its
224 /// pedestal and gain parameters.
225 /// Must insure before calling that channel is valid (i.e. between 0 and
226 /// pedestals or gains->GetSize()-1, but also corresponding to a valid channel
227 /// otherwise results are not predictible...)
229 static const Int_t kMaxADC = (1<<12)-1; // We code the charge on a 12 bits ADC.
231 Float_t pedestalMean = pedestals.ValueAsFloat(channel,0);
232 Float_t pedestalSigma = pedestals.ValueAsFloat(channel,1);
234 AliDebugClass(1,Form("DE %04d MANU %04d CH %02d PEDMEAN %7.2f PEDSIGMA %7.2f",
235 pedestals.ID0(),pedestals.ID1(),channel,pedestalMean,pedestalSigma));
237 Float_t a0 = gains.ValueAsFloat(channel,0);
238 Float_t a1 = gains.ValueAsFloat(channel,1);
239 Int_t thres = gains.ValueAsInt(channel,2);
240 Int_t qual = gains.ValueAsInt(channel,3);
241 if ( qual <= 0 ) return 0;
243 Float_t chargeThres = a0*thres;
245 Float_t padc(0); // (adc - ped) value
247 if ( charge <= chargeThres || TMath::Abs(a1) < 1E-12 )
251 if ( TMath::Abs(a0) > 1E-12 )
258 // linear + parabolic part
259 Double_t qt = chargeThres - charge;
260 Double_t delta = a0*a0-4*a1*qt;
263 AliErrorClass(Form("delta=%e DE %d Manu %d Channel %d "
264 " charge %e a0 %e a1 %e thres %d ped %e pedsig %e",
265 delta,pedestals.ID0(),pedestals.ID1(),
266 channel, charge, a0, a1, thres, pedestalMean,
271 delta = TMath::Sqrt(delta);
273 padc = ( ( -a0 + delta ) > 0 ? ( -a0 + delta ) : ( -a0 - delta ) );
279 if ( TMath::Abs(padc) > 1E-3)
281 // this is more than a precision problem : let's signal it !
282 AliErrorClass(Form("padc=%e DE %d Manu %d Channel %d "
283 " charge %e a0 %e a1 %e thres %d ped %e pedsig %e delta %e",
284 padc,pedestals.ID0(),pedestals.ID1(),
285 channel, charge, a0, a1, thres, pedestalMean,
286 pedestalSigma,delta));
289 // ok. consider we're just at thres, let it be zero.
300 Float_t adcNoise = 0.0;
306 adcNoise = NoiseFunction()->GetRandom()*pedestalSigma;
310 adcNoise = gRandom->Gaus(0.0,pedestalSigma);
314 adc = TMath::Nint(padc + pedestalMean + adcNoise + 0.5);
316 if ( adc < TMath::Nint(pedestalMean + fgkNSigmas*pedestalSigma + 0.5) )
321 // be sure we stick to 12 bits.
330 //_____________________________________________________________________________
332 AliMUONDigitizerV3::Exec(Option_t*)
335 /// We first loop over input files, and merge the sdigits we found there.
336 /// Second, we digitize all the resulting sdigits
337 /// Then we generate noise-only digits (for tracker only)
338 /// And we finally generate the trigger outputs.
342 AliDebug(1, "Running digitizer.");
344 if ( fManager->GetNinputs() == 0 )
346 AliWarning("No input set. Nothing to do.");
350 if ( !fIsInitialized )
352 AliError("Not initialized. Cannot perform the work. Sorry");
356 Int_t nInputFiles = fManager->GetNinputs();
358 AliLoader* outputLoader = GetLoader(fManager->GetOutputFolderName());
360 outputLoader->MakeDigitsContainer();
362 TTree* oTreeD = outputLoader->TreeD();
366 AliFatal("Cannot create output TreeD");
369 // Loop over all the input files, and merge the sdigits found in those
372 for ( Int_t iFile = 0; iFile < nInputFiles; ++iFile )
374 AliLoader* inputLoader = GetLoader(fManager->GetInputFolderName(iFile));
376 inputLoader->LoadSDigits("READ");
378 TTree* iTreeS = inputLoader->TreeS();
381 AliFatal(Form("Could not get access to input file #%d",iFile));
384 AliMUONVDigitStore* inputStore = AliMUONVDigitStore::Create(*iTreeS);
385 inputStore->Connect(*iTreeS);
389 MergeWithSDigits(fDigitStore,*inputStore,fManager->GetMask(iFile));
391 inputLoader->UnloadSDigits();
396 // At this point, we do have digit arrays (one per chamber) which contains
397 // the merging of all the sdigits of the input file(s).
398 // We now massage them to apply the detector response, i.e. this
399 // is here that we do the "digitization" work.
401 if (!fOutputDigitStore)
403 fOutputDigitStore = fDigitStore->Create();
406 if ( fGenerateNoisyDigits>=2 )
408 // Generate noise-only digits for trigger.
409 GenerateNoisyDigitsForTrigger(*fDigitStore);
412 ApplyResponse(*fDigitStore,*fOutputDigitStore);
414 if ( fGenerateNoisyDigits )
416 // Generate noise-only digits for tracker.
417 GenerateNoisyDigits(*fOutputDigitStore);
420 // We generate the global and local trigger decisions.
421 fTriggerProcessor->Digits2Trigger(*fOutputDigitStore,*fTriggerStore);
423 // Prepare output tree
424 Bool_t okD = fOutputDigitStore->Connect(*oTreeD,kFALSE);
425 Bool_t okT = fTriggerStore->Connect(*oTreeD,kFALSE);
428 AliError(Form("Could not make branch : Digit %d Trigger %d",okD,okT));
432 // Fill the output treeD
435 // Write to the output tree(D).
436 // Please note that as GlobalTrigger, LocalTrigger and Digits are in the same
437 // tree (=TreeD) in different branches, this WriteDigits in fact writes all of
439 outputLoader->WriteDigits("OVERWRITE");
441 outputLoader->UnloadDigits();
443 // Finally, we clean up after ourselves.
444 fTriggerStore->Clear();
445 fDigitStore->Clear();
446 fOutputDigitStore->Clear();
450 //_____________________________________________________________________________
452 AliMUONDigitizerV3::GenerateNoisyDigits(AliMUONVDigitStore& digitStore)
454 /// According to a given probability, generate digits that
455 /// have a signal above the noise cut (ped+n*sigma_ped), i.e. digits
456 /// that are "only noise".
460 for ( Int_t i = 0; i < AliMUONConstants::NTrackingCh(); ++i )
466 while ( !it.IsDone() )
468 for ( Int_t cathode = 0; cathode < 2; ++cathode )
470 GenerateNoisyDigitsForOneCathode(digitStore,it.CurrentDEId(),cathode);
477 //_____________________________________________________________________________
479 AliMUONDigitizerV3::GenerateNoisyDigitsForOneCathode(AliMUONVDigitStore& digitStore,
480 Int_t detElemId, Int_t cathode)
482 /// Generate noise-only digits for one cathode of one detection element.
483 /// Called by GenerateNoisyDigits()
485 const AliMpVSegmentation* seg
486 = AliMpSegmentation::Instance()->GetMpSegmentation(detElemId,AliMp::GetCathodType(cathode));
487 Int_t nofPads = seg->NofPads();
489 Int_t maxIx = seg->MaxPadIndexX();
490 Int_t maxIy = seg->MaxPadIndexY();
492 static const Double_t kProbToBeOutsideNsigmas = TMath::Erfc(fgkNSigmas/TMath::Sqrt(2.0)) / 2. ;
494 Int_t nofNoisyPads = TMath::Nint(kProbToBeOutsideNsigmas*nofPads);
495 if ( !nofNoisyPads ) return;
498 TMath::Nint(gRandom->Gaus(nofNoisyPads,
499 nofNoisyPads/TMath::Sqrt(nofNoisyPads)));
501 AliDebug(3,Form("DE %d cath %d nofNoisyPads %d",detElemId,cathode,nofNoisyPads));
503 for ( Int_t i = 0; i < nofNoisyPads; ++i )
510 ix = gRandom->Integer(maxIx+1);
511 iy = gRandom->Integer(maxIy+1);
512 pad = seg->PadByIndices(AliMpIntPair(ix,iy),kFALSE);
513 } while ( !pad.IsValid() );
515 Int_t manuId = pad.GetLocation().GetFirst();
516 Int_t manuChannel = pad.GetLocation().GetSecond();
518 AliMUONVCalibParam* pedestals = fCalibrationData->Pedestals(detElemId,manuId);
522 // no pedestal available for this channel, simply give up
526 AliMUONVDigit* d = digitStore.CreateDigit(detElemId,manuId,manuChannel,cathode);
530 d->SetCharge(0.0); // charge is zero, the ApplyResponseToTrackerDigit will add the noise
532 ApplyResponseToTrackerDigit(*d,kTRUE);
535 Bool_t ok = digitStore.Add(*d,AliMUONVDigitStore::kDeny);
536 // this can happen (that we randomly chose a digit that is
537 // already there). We simply ignore this, but log the occurence
538 // to cross-check that it's not too frequent.
541 fLogger->Log("Collision while adding noiseOnly digit");
545 fLogger->Log("Added noiseOnly digit");
550 AliError("Pure noise below threshold. This should not happen. Not adding "
558 //_____________________________________________________________________________
560 AliMUONDigitizerV3::GenerateNoisyDigitsForTrigger(AliMUONVDigitStore& digitStore)
562 /// Generate noise-only digits for one cathode of one detection element.
563 /// Called by GenerateNoisyDigits()
565 if ( !fNoiseFunctionTrig )
567 fNoiseFunctionTrig = new TF1("AliMUONDigitizerV3::fNoiseFunctionTrig","landau",
570 fNoiseFunctionTrig->SetParameters(3.91070e+02, 9.85026, 9.35881e-02);
574 AliMUONVDigit *d[2]={0x0};
576 for ( Int_t chamberId = AliMUONConstants::NTrackingCh(); chamberId < AliMUONConstants::NCh(); ++chamberId )
579 Int_t nofNoisyPads = 50;
581 Float_t r=-1, fi = 0., gx, gy, x, y, z, xg01, yg01, zg, xg02, yg02;
584 AliDebug(3,Form("Chamber %d nofNoisyPads %d",chamberId,nofNoisyPads));
586 for ( Int_t i = 0; i < nofNoisyPads; ++i )
588 //printf("Generating noise %i\n",i);
591 Bool_t isOk = kFALSE;
592 Int_t detElemId = -1;
594 //r = gRandom->Landau(9.85026, 9.35881e-02);
595 r = fNoiseFunctionTrig->GetRandom();
596 fi = 2. * TMath::Pi() * gRandom->Rndm();
597 //printf("r = %f\tfi = %f\n", r, fi);
598 gx = r * TMath::Cos(fi);
599 gy = r * TMath::Sin(fi);
601 for ( it.First(chamberId); ! it.IsDone(); it.Next() ){
602 Int_t currDetElemId = it.CurrentDEId();
603 const AliMpVSegmentation* seg
604 = AliMpSegmentation::Instance()->GetMpSegmentation(currDetElemId,AliMp::GetCathodType(0));
606 Float_t deltax = seg->Dimensions().X();
607 Float_t deltay = seg->Dimensions().Y();
608 GetTransformer()->Local2Global(currDetElemId, -deltax, -deltay, 0, xg01, yg01, zg);
609 GetTransformer()->Local2Global(currDetElemId, deltax, deltay, 0, xg02, yg02, zg);
610 Float_t xg1 = xg01, xg2 = xg02, yg1 = yg01, yg2 = yg02;
619 if(gx>=xg1 && gx<=xg2 && gy>=yg1 && gy<=yg2){
620 detElemId = currDetElemId;
621 GetTransformer()->Global2Local(detElemId, gx, gy, 0, x, y, z);
622 pad[0] = seg->PadByPosition(TVector2(x,y),kFALSE);
623 if(!pad[0].IsValid()) continue;
630 const AliMpVSegmentation* seg1
631 = AliMpSegmentation::Instance()->GetMpSegmentation(detElemId,AliMp::GetCathodType(1));
632 pad[1] = seg1->PadByPosition(TVector2(x,y),kFALSE);
634 for ( Int_t cathode = 0; cathode < 2; ++cathode ){
635 Int_t manuId = pad[cathode].GetLocation(0).GetFirst();
636 Int_t manuChannel = pad[cathode].GetLocation(0).GetSecond();
637 d[cathode] = digitStore.CreateDigit(detElemId,manuId,manuChannel,cathode);
638 ix = pad[cathode].GetIndices().GetFirst();
639 iy = pad[cathode].GetIndices().GetSecond();
640 d[cathode]->SetPadXY(ix,iy);
641 //d[cathode].SetSignal(1);
642 //d[cathode].SetPhysicsSignal(0);
643 d[cathode]->SetCharge(1);
644 d[cathode]->NoiseOnly(kTRUE);
645 AliDebug(3,Form("Adding a pure noise digit :"));
647 Bool_t ok = digitStore.Add(*d[cathode],AliMUONVDigitStore::kDeny);
650 fLogger->Log("Collision while adding TriggerNoise digit");
654 fLogger->Log("Added triggerNoise digit");
657 } // loop on noisy pads
658 } // loop on chambers
662 //_____________________________________________________________________________
664 AliMUONDigitizerV3::GetLoader(const TString& folderName)
666 /// Get a MUON loader
668 AliDebug(2,Form("Getting access to folder %s",folderName.Data()));
669 AliLoader* loader = AliRunLoader::GetDetectorLoader("MUON",folderName.Data());
672 AliError(Form("Could not get MuonLoader from folder %s",folderName.Data()));
678 //_____________________________________________________________________________
680 AliMUONDigitizerV3::Init()
682 /// Initialization of the TTask :
683 /// a) create the calibrationData, according to run number
684 /// b) create the trigger processing task
688 if ( fIsInitialized )
690 AliError("Object already initialized.");
696 AliError("fManager is null !");
701 if ( ! AliMpCDB::LoadDDLStore() ) {
702 AliFatal("Could not access mapping from OCDB !");
705 if (!fCalibrationData)
706 AliFatal("Calibration data object not defined");
708 if ( !fCalibrationData->Pedestals() )
710 AliFatal("Could not access pedestals from OCDB !");
712 if ( !fCalibrationData->Gains() )
714 AliFatal("Could not access gains from OCDB !");
718 AliInfo("Using trigger configuration from CDB");
720 fTriggerProcessor = new AliMUONTriggerElectronics(fCalibrationData);
722 AliDebug(1, Form("Will %s generate noise-only digits for tracker",
723 (fGenerateNoisyDigits ? "":"NOT")));
725 fIsInitialized = kTRUE;
729 //_____________________________________________________________________________
731 AliMUONDigitizerV3::MergeWithSDigits(AliMUONVDigitStore*& outputStore,
732 const AliMUONVDigitStore& input,
735 /// Merge the sdigits in inputData with the digits already present in outputData
737 if ( !outputStore ) outputStore = input.Create();
739 TIter next(input.CreateIterator());
740 AliMUONVDigit* sdigit;
742 while ( ( sdigit = static_cast<AliMUONVDigit*>(next()) ) )
744 // Update the track references using the mask.
745 // FIXME: this is dirty, for backward compatibility only.
746 // Should re-design all this way of keeping track of MC information...
747 if ( mask ) sdigit->PatchTracks(mask);
748 // Then add or update the digit to the output.
749 AliMUONVDigit* added = outputStore->Add(*sdigit,AliMUONVDigitStore::kMerge);
752 AliError("Could not add digit in merge mode");
757 //_____________________________________________________________________________
759 AliMUONDigitizerV3::NoiseFunction()
761 /// Return noise function
765 f = new TF1("AliMUONDigitizerV3::NoiseFunction","gaus",fgkNSigmas,fgkNSigmas*10);
766 f->SetParameters(1,0,1);