#include "AliMUONDigitizerV3.h"
#include "AliLog.h"
+#include "AliMUON.h"
#include "AliMUONCalibrationData.h"
-#include "AliMUONChamber.h"
#include "AliMUONConstants.h"
#include "AliMUONData.h"
+#include "AliMUONDataIterator.h"
#include "AliMUONDigit.h"
+#include "AliMUONSegmentation.h"
#include "AliMUONTriggerDecisionV1.h"
+#include "AliMUONTriggerEfficiencyCells.h"
#include "AliMUONTriggerElectronics.h"
#include "AliMUONVCalibParam.h"
+#include "AliMpDEIterator.h"
#include "AliMpDEManager.h"
+#include "AliMpIntPair.h"
+#include "AliMpPad.h"
#include "AliMpStationType.h"
+#include "AliMpVSegmentation.h"
#include "AliRun.h"
#include "AliRunDigitizer.h"
#include "AliRunLoader.h"
#include "Riostream.h"
+#include "TF1.h"
#include "TRandom.h"
#include "TString.h"
+///
+/// The digitizer is performing the transformation to go from SDigits (digits
+/// w/o any electronic noise) to Digits (w/ electronic noise, and decalibration)
+///
+/// The decalibration is performed by doing the reverse operation of the
+/// calibration, that is we do (Signal+pedestal)/gain -> ADC
+///
+/// Note also that the digitizer takes care of merging sdigits that belongs
+/// to the same pad, either because we're merging several input sdigit files
+/// or with a single file because the sdigitizer does not merge sdigits itself
+/// (for performance reason mainly, and because anyway we know we have to do it
+/// here, at the digitization level).
+///
+
+namespace
+{
+ AliMUON* muon()
+ {
+ return static_cast<AliMUON*>(gAlice->GetModule("MUON"));
+ }
+
+ AliMUONSegmentation* Segmentation()
+ {
+ static AliMUONSegmentation* segmentation = muon()->GetSegmentation();
+ return segmentation;
+ }
+}
+
+const Double_t AliMUONDigitizerV3::fgkNSigmas=3;
+
ClassImp(AliMUONDigitizerV3)
//_____________________________________________________________________________
AliMUONDigitizerV3::AliMUONDigitizerV3(AliRunDigitizer* manager,
- ETriggerCodeVersion triggerCodeVersion)
+ ETriggerCodeVersion triggerCodeVersion,
+ Bool_t useTriggerEfficiency,
+ Bool_t generateNoisyDigits)
: AliDigitizer(manager),
fIsInitialized(kFALSE),
fOutputData(0x0),
fCalibrationData(0x0),
fTriggerProcessor(0x0),
-fTriggerCodeVersion(triggerCodeVersion)
+fTriggerCodeVersion(triggerCodeVersion),
+fUseTriggerEfficiency(useTriggerEfficiency),
+fTriggerEfficiency(0x0),
+fNoiseFunction(0x0),
+fGenerateNoisyDigits(generateNoisyDigits)
{
//
// Ctor.
//
AliDebug(1,Form("AliRunDigitizer=%p",fManager));
+ fGenerateNoisyDigitsTimer.Start(kTRUE); fGenerateNoisyDigitsTimer.Stop();
+ fExecTimer.Start(kTRUE); fExecTimer.Stop();
+ fFindDigitIndexTimer.Start(kTRUE); fFindDigitIndexTimer.Stop();
}
//______________________________________________________________________________
// Dtor. Note we're the owner of some pointers.
//
AliDebug(1,"dtor");
+
delete fOutputData;
delete fCalibrationData;
delete fTriggerProcessor;
+ delete fNoiseFunction;
+
+ AliInfo(Form("Execution time for FindDigitIndex() : R:%.2fs C:%.2fs",
+ fFindDigitIndexTimer.RealTime(),fFindDigitIndexTimer.CpuTime()));
+ if ( fGenerateNoisyDigits )
+ {
+ AliInfo(Form("Execution time for GenerateNoisyDigits() : R:%.2fs C:%.2fs",
+ fGenerateNoisyDigitsTimer.RealTime(),
+ fGenerateNoisyDigitsTimer.CpuTime()));
+ }
+ AliInfo(Form("Execution time for Exec() : R:%.2fs C:%.2fs",
+ fExecTimer.RealTime(),fExecTimer.CpuTime()));
+
}
//______________________________________________________________________________
//_____________________________________________________________________________
void
-AliMUONDigitizerV3::ApplyResponseToDigit(AliMUONDigit& digit)
+AliMUONDigitizerV3::ApplyResponseToTrackerDigit(AliMUONDigit& digit, Bool_t addNoise)
{
- // For trigger digits, simply does nothing.
- //
// For tracking digits, starting from an ideal digit's charge, we :
//
- // - add some noise (thus leading to a realistic charge)
+ // - add some noise (thus leading to a realistic charge), if requested to do so
// - divide by a gain (thus decalibrating the digit)
// - add a pedestal (thus decalibrating the digit)
// - sets the signal to zero if below 3*sigma of the noise
//
- static const Int_t MAXADC = (1<<12)-1; // We code the charge on a 12 bits ADC.
+ static const Int_t kMaxADC = (1<<12)-1; // We code the charge on a 12 bits ADC.
- Int_t detElemId = digit.DetElemId();
- AliMpStationType stationType = AliMpDEManager::GetStationType(detElemId);
- if ( stationType == kStationTrigger )
- {
- return;
- }
+ Float_t signal = digit.Signal();
- // The following is for tracking digits only.
+ Int_t detElemId = digit.DetElemId();
Int_t manuId = digit.ManuId();
Int_t manuChannel = digit.ManuChannel();
- AliMUONVCalibParam* pedestal = fCalibrationData->Pedestal(detElemId,manuId);
+ AliMUONVCalibParam* pedestal = fCalibrationData->Pedestals(detElemId,manuId);
if (!pedestal)
{
AliFatal(Form("Could not get pedestal for DE=%d manuId=%d",
}
Float_t pedestalMean = pedestal->ValueAsFloat(manuChannel,0);
Float_t pedestalSigma = pedestal->ValueAsFloat(manuChannel,1);
-
- Float_t adc_noise = gRandom->Gaus(0.0,pedestalSigma);
-
- AliMUONVCalibParam* gain = fCalibrationData->Gain(detElemId,manuId);
+
+ AliMUONVCalibParam* gain = fCalibrationData->Gains(detElemId,manuId);
if (!gain)
{
AliFatal(Form("Could not get gain for DE=%d manuId=%d",
detElemId,manuId));
- }
-
+ }
Float_t gainMean = gain->ValueAsFloat(manuChannel,0);
- Float_t signal_noise = adc_noise*gainMean;
+
+ if ( addNoise )
+ {
+ Float_t adcNoise = gRandom->Gaus(0.0,pedestalSigma);
+
+ signal += adcNoise*gainMean;
+ }
- Float_t signal = digit.Signal() + signal_noise;
Int_t adc;
if ( gainMean < 1E-6 )
{
adc = TMath::Nint( signal / gainMean + pedestalMean );
- if ( adc <= pedestalMean + 3.0*pedestalSigma )
+ if ( adc <= pedestalMean + fgkNSigmas*pedestalSigma )
{
adc = 0;
}
}
// be sure we stick to 12 bits.
- if ( adc > MAXADC )
+ if ( adc > kMaxADC )
{
- adc = MAXADC;
+ adc = kMaxADC;
}
digit.SetPhysicsSignal(TMath::Nint(signal));
digit.SetSignal(adc);
digit.SetADC(adc);
}
+//_____________________________________________________________________________
+void
+AliMUONDigitizerV3::ApplyResponseToTriggerDigit(AliMUONDigit& digit,
+ AliMUONData* data)
+{
+ if ( !fTriggerEfficiency ) return;
+
+ AliMUONDigit* correspondingDigit = FindCorrespondingDigit(digit,data);
+
+ Int_t detElemId = digit.DetElemId();
+
+ const AliMpVSegmentation* segment[2] =
+ {
+ Segmentation()->GetMpSegmentation(detElemId,digit.Cathode()),
+ Segmentation()->GetMpSegmentation(detElemId,correspondingDigit->Cathode())
+ };
+
+ AliMpPad pad[2] =
+ {
+ segment[0]->PadByIndices(AliMpIntPair(digit.PadX(),digit.PadY()),kTRUE),
+ segment[1]->PadByIndices(AliMpIntPair(correspondingDigit->PadX(),correspondingDigit->PadY()),kTRUE)
+ };
+
+ Int_t ix(0);
+ Int_t iy(1);
+
+ if (digit.Cathode()==0)
+ {
+ ix=1;
+ iy=0;
+ }
+
+ Float_t x = pad[ix].Position().X();
+ Float_t y = pad[iy].Position().Y();
+ if ( x==-1 && y==-1 )
+ {
+ x=-9999.;
+ y=-9999.;
+ AliError(Form("Got an unknown position for a digit in DE %d at (ix,iy)=(%d,%d)",
+ detElemId,pad[ix].GetIndices().GetFirst(),pad[iy].GetIndices().GetSecond()));
+ }
+ Float_t x0 = segment[0]->Dimensions().X();
+ Float_t y0 = segment[1]->Dimensions().Y();
+ TVector2 newCoord = fTriggerEfficiency->ChangeReferenceFrame(x, y, x0, y0);
+
+ Bool_t isTrig[2];
+ fTriggerEfficiency->IsTriggered(detElemId, newCoord.Px(), newCoord.Py(),
+ isTrig[0], isTrig[1]);
+
+ if (!isTrig[digit.Cathode()])
+ {
+ digit.SetSignal(0);
+ }
+
+ if ( &digit != correspondingDigit )
+ {
+ if (!isTrig[correspondingDigit->Cathode()])
+ {
+ correspondingDigit->SetSignal(0);
+ }
+ }
+}
+
//_____________________________________________________________________________
void
AliMUONDigitizerV3::ApplyResponse()
// Loop over all chamber digits, and apply the response to them
// Note that this method may remove digits.
//
+ const Bool_t kAddNoise = kTRUE;
+
for ( Int_t ich = 0; ich < AliMUONConstants::NCh(); ++ich )
- {
+ {
TClonesArray* digits = fOutputData->Digits(ich);
Int_t n = digits->GetEntriesFast();
+ Bool_t trackingChamber = ( ich < AliMUONConstants::NTrackingCh() );
for ( Int_t i = 0; i < n; ++i )
{
AliMUONDigit* d = static_cast<AliMUONDigit*>(digits->UncheckedAt(i));
- ApplyResponseToDigit(*d);
+ if ( trackingChamber )
+ {
+ ApplyResponseToTrackerDigit(*d,kAddNoise);
+ }
+ else
+ {
+ ApplyResponseToTriggerDigit(*d,fOutputData);
+ }
if ( d->Signal() <= 0 )
{
digits->RemoveAt(i);
}
digits->Compress();
}
+
+// The version below, using iterator, does not yet work (as the iterator
+// assumes it is reading digits from the tree, while in this case it's
+// writing...)
+//
+// AliMUONDigit* digit(0x0);
+//
+// // First loop on tracker digits
+// AliMUONDataIterator tracker(fOutputData,"D",AliMUONDataIterator::kTrackingChambers);
+//
+// while ( ( digit = static_cast<AliMUONDigit*>(tracker.Next()) ) )
+// {
+// ApplyResponseToTrackerDigit(*digit);
+// if ( digit->Signal() <= 0 )
+// {
+// tracker.Remove();
+// }
+//
+// }
+//
+// // Then loop on trigger digits
+// AliMUONDataIterator trigger(fOutputData,"D",AliMUONDataIterator::kTriggerChambers);
+//
+// while ( ( digit = static_cast<AliMUONDigit*>(trigger.Next()) ) )
+// {
+// ApplyResponseToTriggerDigit(*digit,fOutputData);
+// if ( digit->Signal() <= 0 )
+// {
+// trigger.Remove();
+// }
+// }
}
//_____________________________________________________________________________
//
// Main method.
// We first loop over input files, and merge the sdigits we found there.
- // We then digitize all the resulting sdigits
+ // Second, we digitize all the resulting sdigits
+ // Then we generate noise-only digits (for tracker only)
// And we finally generate the trigger outputs.
//
+
AliDebug(1, "Running digitizer.");
if ( fManager->GetNinputs() == 0 )
return;
}
+ fExecTimer.Start(kFALSE);
+
Int_t nInputFiles = fManager->GetNinputs();
if ( fOutputData->TreeD() == 0x0 )
// is here that we do the "digitization" work.
ApplyResponse();
-
+
+ if ( fGenerateNoisyDigits )
+ {
+ // Generate noise-only digits for tracker.
+ GenerateNoisyDigits();
+ }
+
// We generate the global and local trigger decisions.
fTriggerProcessor->ExecuteTask();
fOutputData->ResetDigits();
fOutputData->ResetTrigger();
fOutputData->GetLoader()->UnloadDigits();
+
+ fExecTimer.Stop();
+}
+
+//_____________________________________________________________________________
+AliMUONDigit*
+AliMUONDigitizerV3::FindCorrespondingDigit(AliMUONDigit& digit,
+ AliMUONData* data)
+{
+ AliMUONDataIterator it(data,"D",AliMUONDataIterator::kAllChambers);
+ AliMUONDigit* cd;
+
+ while ( ( cd = static_cast<AliMUONDigit*>(it.Next()) ) )
+ {
+ if ( cd->DetElemId() == digit.DetElemId() &&
+ cd->Hit() == digit.Hit() &&
+ cd->Cathode() != digit.Cathode() )
+ {
+ return cd;
+ }
+ }
+ return 0x0;
}
+
//_____________________________________________________________________________
Int_t
-AliMUONDigitizerV3::FindDigitIndex(TClonesArray& array, const AliMUONDigit& digit)
+AliMUONDigitizerV3::FindDigitIndex(TClonesArray& array,
+ const AliMUONDigit& digit) const
{
//
// Return the index of digit within array, if that digit is there,
// FIXME: this is of course not the best implementation you can think of.
// Reconsider the use of hit/digit map... ? (but be sure it's needed!)
//
+
+ fFindDigitIndexTimer.Start(kFALSE);
+
Int_t n = array.GetEntriesFast();
for ( Int_t i = 0; i < n; ++i )
{
d->PadY() == digit.PadY() &&
d->Cathode() == digit.Cathode() )
{
+ fFindDigitIndexTimer.Stop();
return i;
}
}
+ fFindDigitIndexTimer.Stop();
return -1;
}
+//_____________________________________________________________________________
+void
+AliMUONDigitizerV3::GenerateNoisyDigits()
+{
+ //
+ // According to a given probability, generate digits that
+ // have a signal above the noise cut (ped+n*sigma_ped), i.e. digits
+ // that are "only noise".
+ //
+
+ if ( !fNoiseFunction )
+ {
+ fNoiseFunction = new TF1("AliMUONDigitizerV3::fNoiseFunction","gaus",
+ fgkNSigmas,fgkNSigmas*10);
+
+ fNoiseFunction->SetParameters(1,0,1);
+ }
+
+ fGenerateNoisyDigitsTimer.Start(kFALSE);
+
+ for ( Int_t i = 0; i < AliMUONConstants::NTrackingCh(); ++i )
+ {
+ AliMpDEIterator it;
+
+ it.First(i);
+
+ while ( !it.IsDone() )
+ {
+ for ( Int_t cathode = 0; cathode < 2; ++cathode )
+ {
+ GenerateNoisyDigitsForOneCathode(it.CurrentDE(),cathode);
+ }
+ it.Next();
+ }
+ }
+
+ fGenerateNoisyDigitsTimer.Stop();
+}
+
+//_____________________________________________________________________________
+void
+AliMUONDigitizerV3::GenerateNoisyDigitsForOneCathode(Int_t detElemId, Int_t cathode)
+{
+ //
+ // Generate noise-only digits for one cathode of one detection element.
+ // Called by GenerateNoisyDigits()
+ //
+
+ TClonesArray* digits = fOutputData->Digits(detElemId/100-1);
+
+ const AliMpVSegmentation* seg = Segmentation()->GetMpSegmentation(detElemId,cathode);
+ Int_t nofPads = seg->NofPads();
+
+ Int_t maxIx = seg->MaxPadIndexX();
+ Int_t maxIy = seg->MaxPadIndexY();
+
+ static const Double_t probToBeOutsideNsigmas = 1 - TMath::Erf(fgkNSigmas/TMath::Sqrt(2.0));
+
+ Int_t nofNoisyPads = TMath::Nint(probToBeOutsideNsigmas*nofPads);
+ if ( !nofNoisyPads ) return;
+
+ nofNoisyPads =
+ TMath::Nint(gRandom->Gaus(nofNoisyPads,
+ nofNoisyPads/TMath::Sqrt(nofNoisyPads)));
+
+ AliDebug(3,Form("DE %d cath %d nofNoisyPads %d",detElemId,cathode,nofNoisyPads));
+
+ for ( Int_t i = 0; i < nofNoisyPads; ++i )
+ {
+ Int_t ix(-1);
+ Int_t iy(-1);
+ do {
+ ix = gRandom->Integer(maxIx+1);
+ iy = gRandom->Integer(maxIy+1);
+ } while ( !seg->HasPad(AliMpIntPair(ix,iy)) );
+ AliMUONDigit d;
+ d.SetDetElemId(detElemId);
+ d.SetCathode(cathode);
+ d.SetPadX(ix);
+ d.SetPadY(iy);
+ if ( FindDigitIndex(*digits,d) >= 0 )
+ {
+ // this digit is already there, and not noise-only, we simply skip it
+ continue;
+ }
+ AliMpPad pad = seg->PadByIndices(AliMpIntPair(ix,iy));
+ Int_t manuId = pad.GetLocation().GetFirst();
+ Int_t manuChannel = pad.GetLocation().GetSecond();
+
+ d.SetElectronics(manuId,manuChannel);
+
+ AliMUONVCalibParam* pedestals = fCalibrationData->Pedestals(detElemId,manuId);
+
+ Float_t pedestalMean = pedestals->ValueAsFloat(manuChannel,0);
+ Float_t pedestalSigma = pedestals->ValueAsFloat(manuChannel,1);
+
+ Double_t ped = fNoiseFunction->GetRandom()*pedestalSigma;
+
+ d.SetSignal(TMath::Nint(ped+pedestalMean+0.5));
+ d.NoiseOnly(kTRUE);
+ AliDebug(3,Form("Adding a pure noise digit :"));
+ StdoutToAliDebug(3,cout << "Before Response: " << endl;
+ d.Print(););
+ ApplyResponseToTrackerDigit(d,kFALSE);
+ if ( d.Signal() > 0 )
+ {
+ AddOrUpdateDigit(*digits,d);
+ }
+ else
+ {
+ AliError("Pure noise below threshold. This should not happen. Not adding "
+ "this digit.");
+ }
+ StdoutToAliDebug(3,cout << "After Response: " << endl;
+ d.Print(););
+ }
+}
+
//_____________________________________________________________________________
AliMUONData*
AliMUONDigitizerV3::GetDataAccess(const TString& folderName)
fTriggerProcessor = new AliMUONTriggerDecisionV1(fOutputData);
break;
case kTriggerElectronics:
- fTriggerProcessor = new AliMUONTriggerElectronics(fOutputData);
+ fTriggerProcessor = new AliMUONTriggerElectronics(fOutputData,fCalibrationData);
break;
default:
AliFatal("Unknown trigger processor type");
}
AliDebug(1,Form("Using the following trigger code %s - %s",
fTriggerProcessor->GetName(),fTriggerProcessor->GetTitle()));
+
+ if ( fUseTriggerEfficiency )
+ {
+ fTriggerEfficiency = fCalibrationData->TriggerEfficiency();
+ if ( fTriggerEfficiency )
+ {
+ AliInfo("Will apply trigger efficiency");
+ }
+ else
+ {
+ AliError("I was requested to apply trigger efficiency, but I could "
+ "not get it !");
+ }
+ }
+
+ if ( fGenerateNoisyDigits )
+ {
+ AliInfo("Will generate noise-only digits for tracker");
+ }
+
fIsInitialized = kTRUE;
return kTRUE;
}
git://git.uio.no / u / mrichter / AliRoot.git / commitdiff