//
-// Class to do the sharing correction of FMD ESD data
+// Class to do the sharing correction. That is, a filter that merges
+// adjacent strip signals presumably originating from a single particle
+// that impinges on the detector in such a way that it deposite energy
+// into two or more strips.
+//
+// Input:
+// - AliESDFMD object - from reconstruction
+//
+// Output:
+// - AliESDFMD object - copy of input, but with signals merged
+//
+// Corrections used:
+// - AliFMDCorrELossFit
+//
+// Histograms:
+// - For each ring (FMD1i, FMD2i, FMD2o, FMD3i, FMD3o) the distribution of
+// signals before and after the filter.
+// - For each ring (see above), an array of distributions of number of
+// hit strips for each vertex bin (if enabled - see Init method)
+//
+//
//
#include "AliFMDSharingFilter.h"
#include <AliESDFMD.h>
#include <TList.h>
#include <TH1.h>
#include <TMath.h>
-#include "AliFMDAnaParameters.h"
+#include "AliForwardCorrectionManager.h"
#include <AliLog.h>
+#include <TROOT.h>
+#include <iostream>
+#include <iomanip>
ClassImp(AliFMDSharingFilter)
#if 0
AliFMDSharingFilter::AliFMDSharingFilter()
: TNamed(),
fRingHistos(),
- fLowCut(0.3),
+ fLowCut(0.),
fCorrectAngles(kFALSE),
+ fNXi(1),
fDebug(0)
-{}
+{
+ //
+ // Default Constructor - do not use
+ //
+}
//____________________________________________________________________
AliFMDSharingFilter::AliFMDSharingFilter(const char* title)
: TNamed("fmdSharingFilter", title),
fRingHistos(),
- fLowCut(0.3),
+ fLowCut(0.),
fCorrectAngles(kFALSE),
+ fNXi(1),
fDebug(0)
{
+ //
+ // Constructor
+ //
+ // Parameters:
+ // title Title of object - not significant
+ //
fRingHistos.Add(new RingHistos(1, 'I'));
fRingHistos.Add(new RingHistos(2, 'I'));
fRingHistos.Add(new RingHistos(2, 'O'));
fRingHistos(),
fLowCut(o.fLowCut),
fCorrectAngles(o.fCorrectAngles),
+ fNXi(o.fNXi),
fDebug(o.fDebug)
{
+ //
+ // Copy constructor
+ //
+ // Parameters:
+ // o Object to copy from
+ //
TIter next(&o.fRingHistos);
TObject* obj = 0;
while ((obj = next())) fRingHistos.Add(obj);
//____________________________________________________________________
AliFMDSharingFilter::~AliFMDSharingFilter()
{
+ //
+ // Destructor
+ //
fRingHistos.Delete();
}
AliFMDSharingFilter&
AliFMDSharingFilter::operator=(const AliFMDSharingFilter& o)
{
+ //
+ // Assignment operator
+ //
+ // Parameters:
+ // o Object to assign from
+ //
+ // Return:
+ // Reference to this
+ //
TNamed::operator=(o);
fLowCut = o.fLowCut;
fCorrectAngles = o.fCorrectAngles;
+ fNXi = o.fNXi;
fDebug = o.fDebug;
fRingHistos.Delete();
AliFMDSharingFilter::RingHistos*
AliFMDSharingFilter::GetRingHistos(UShort_t d, Char_t r) const
{
+ //
+ // Get the ring histogram container
+ //
+ // Parameters:
+ // d Detector
+ // r Ring
+ //
+ // Return:
+ // Ring histogram container
+ //
Int_t idx = -1;
switch (d) {
case 1: idx = 0; break;
Bool_t lowFlux,
AliESDFMD& output)
{
+ //
+ // Filter the input AliESDFMD object
+ //
+ // Parameters:
+ // input Input
+ // lowFlux If this is a low-flux event
+ // output Output AliESDFMD object
+ //
+ // Return:
+ // True on success, false otherwise
+ //
output.Clear();
TIter next(&fRingHistos);
- RingHistos* o = 0;
+ RingHistos* o = 0;
+ Double_t lowCut = GetLowCut();
while ((o = static_cast<RingHistos*>(next())))
o->Clear();
Double_t mergedEnergy = MultiplicityOfStrip(mult,eta,prevE,nextE,
lowFlux,d,r,s,t,
usedPrev,usedThis);
- if (mergedEnergy > fLowCut) histos->Incr();
+ if (mergedEnergy > lowCut) histos->Incr();
histos->fAfter->Fill(mergedEnergy);
output.SetMultiplicity(d,r,s,t,mergedEnergy);
UShort_t s,
UShort_t t) const
{
+ //
+ // Get the signal in a strip
+ //
+ // Parameters:
+ // fmd ESD object
+ // d Detector
+ // r Ring
+ // s Sector
+ // t Strip
+ //
+ // Return:
+ // The energy signal
+ //
Double_t mult = input.Multiplicity(d,r,s,t);
if (mult == AliESDFMD::kInvalidMult || mult == 0) return mult;
mult = DeAngleCorrect(mult, input.Eta(d,r,s,t));
return mult;
}
+//_____________________________________________________________________
+Double_t
+AliFMDSharingFilter::GetLowCut() const
+{
+ //
+ // Get the low cut. Normally, the low cut is taken to be the lower
+ // value of the fit range used when generating the energy loss fits.
+ // However, if fLowCut is set (using SetLowCit) to a value greater
+ // than 0, then that value is used.
+ //
+ if (fLowCut > 0) return fLowCut;
+ AliForwardCorrectionManager& fcm = AliForwardCorrectionManager::Instance();
+ AliFMDCorrELossFit* fits = fcm.GetELossFit();
+ return fits->GetLowCut();
+}
//_____________________________________________________________________
Double_t
AliFMDSharingFilter::GetHighCut(UShort_t d, Char_t r, Double_t eta) const
{
- AliFMDAnaParameters* pars = AliFMDAnaParameters::Instance();
+ //
+ // Get the high cut. The high cut is defined as the
+ // most-probably-value peak found from the energy distributions, minus
+ // 2 times the width of the corresponding Landau.
+ //
+ AliForwardCorrectionManager& fcm = AliForwardCorrectionManager::Instance();
+
// Get the high cut. The high cut is defined as the
// most-probably-value peak found from the energy distributions, minus
// 2 times the width of the corresponding Landau.
- Double_t mpv = pars->GetMPV(d,r,eta);
- Double_t w = pars->GetSigma(d,r,eta);
- if (mpv > 100)
- AliWarning(Form("FMD%d%c, eta=%f, MPV=%f, W=%f", d, r, eta, mpv, w));
- Double_t highCut = (mpv - 2 * w);
+ AliFMDCorrELossFit::ELossFit* fit = fcm.GetELossFit()->FindFit(d,r,eta);
+ Double_t delta = 1024;
+ Double_t xi = 1024;
+ if (!fit) {
+ AliError(Form("No energy loss fit for FMD%d%c at eta=%f", d, r, eta));
+ }
+ else {
+ delta = fit->fDelta;
+ xi = fit->fXi;
+ }
+
+ if (delta > 100) {
+ AliWarning(Form("FMD%d%c, eta=%f, Delta=%f, xi=%f", d, r, eta, delta, xi));
+ }
+ Double_t highCut = (delta - fNXi * xi);
return highCut;
}
Bool_t& usedPrev,
Bool_t& usedThis)
{
+ //
+ // The actual algorithm
+ //
+ // Parameters:
+ // mult The unfiltered signal in the strip
+ // eta Psuedo rapidity
+ // prevE Previous strip signal (or 0)
+ // nextE Next strip signal (or 0)
+ // lowFlux Whether this is a low flux event
+ // d Detector
+ // r Ring
+ // s Sector
+ // t Strip
+ // usedPrev Whether the previous strip was used in sharing or not
+ // usedThis Wether this strip was used in sharing or not.
+ //
+ // Return:
+ // The filtered signal in the strip
+ //
+
// IF the multiplicity is very large, or below the cut, reject it, and
// flag it as candidate for sharing
- if(mult > 12 || mult < fLowCut) {
+ Double_t lowCut = GetLowCut();
+ if(mult > 12 || mult < lowCut) {
usedThis = kFALSE;
usedPrev = kFALSE;
return 0;
//analyse and perform sharing on one strip
- // Calculate the total energy loss
+ // Get the high cut
Double_t highCut = GetHighCut(d, r, eta);
// If this signal is smaller than the next, and the next signal is smaller
// If the previous signal was larger than the low cut, and
// the previous was smaller than high cut, and the previous signal
// isn't marked as used, then add it's energy to this signal
- if (prevE > fLowCut &&
+ if (prevE > lowCut &&
prevE < highCut &&
!usedPrev)
totalE += prevE;
// If the next signal is larger than the low cut, and
// the next signal is smaller than the low cut, then add the next signal
// to this, and marked the next signal as used
- if(nextE > fLowCut && nextE < highCut ) {
+ if(nextE > lowCut && nextE < highCut ) {
totalE += nextE;
usedThis = kTRUE;
}
Double_t
AliFMDSharingFilter::AngleCorrect(Double_t mult, Double_t eta) const
{
+ //
+ // Angle correct the signal
+ //
+ // Parameters:
+ // mult Angle Un-corrected Signal
+ // eta Pseudo-rapidity
+ //
+ // Return:
+ // Angle corrected signal
+ //
Double_t theta = 2 * TMath::ATan(TMath::Exp(-eta));
if (eta < 0) theta -= TMath::Pi();
return mult * TMath::Cos(theta);
Double_t
AliFMDSharingFilter::DeAngleCorrect(Double_t mult, Double_t eta) const
{
+ //
+ // Angle de-correct the signal
+ //
+ // Parameters:
+ // mult Angle corrected Signal
+ // eta Pseudo-rapidity
+ //
+ // Return:
+ // Angle un-corrected signal
+ //
Double_t theta = 2 * TMath::ATan(TMath::Exp(-eta));
if (eta < 0) theta -= TMath::Pi();
return mult / TMath::Cos(theta);
void
AliFMDSharingFilter::ScaleHistograms(TList* dir, Int_t nEvents)
{
+ //
+ // Scale the histograms to the total number of events
+ //
+ // Parameters:
+ // dir Where the output is
+ // nEvents Number of events
+ //
if (nEvents <= 0) return;
TList* d = static_cast<TList*>(dir->FindObject(GetName()));
if (!d) return;
void
AliFMDSharingFilter::DefineOutput(TList* dir)
{
+ //
+ // Define the output histograms. These are put in a sub list of the
+ // passed list. The histograms are merged before the parent task calls
+ // AliAnalysisTaskSE::Terminate
+ //
+ // Parameters:
+ // dir Directory to add to
+ //
TList* d = new TList;
d->SetName(GetName());
dir->Add(d);
o->Output(d);
}
}
+//____________________________________________________________________
+void
+AliFMDSharingFilter::Print(Option_t* /*option*/) const
+{
+ //
+ // Print information
+ //
+ // Parameters:
+ // option Not used
+ //
+ char ind[gROOT->GetDirLevel()+1];
+ for (Int_t i = 0; i < gROOT->GetDirLevel(); i++) ind[i] = ' ';
+ ind[gROOT->GetDirLevel()] = '\0';
+ std::cout << ind << "AliFMDSharingFilter: " << GetName() << '\n'
+ << ind << " Low cut: " << fLowCut << '\n'
+ << ind << " N xi factor: " << fNXi << '\n'
+ << ind << " Use corrected angles: "
+ << (fCorrectAngles ? "yes" : "no") << std::endl;
+}
//====================================================================
AliFMDSharingFilter::RingHistos::RingHistos()
fAfter(0),
fHits(0),
fNHits(0)
-{}
+{
+ //
+ // Default CTOR
+ //
+
+}
//____________________________________________________________________
AliFMDSharingFilter::RingHistos::RingHistos(UShort_t d, Char_t r)
fHits(0),
fNHits(0)
{
+ //
+ // Constructor
+ //
+ // Parameters:
+ // d detector
+ // r ring
+ //
fBefore = new TH1D(Form("%s_ESD_Eloss", fName.Data()),
Form("Energy loss in %s (reconstruction)", fName.Data()),
1000, 0, 25);
fAfter(o.fAfter),
fHits(o.fHits),
fNHits(o.fNHits)
-{}
+{
+ //
+ // Copy constructor
+ //
+ // Parameters:
+ // o Object to copy from
+ //
+}
//____________________________________________________________________
AliFMDSharingFilter::RingHistos&
AliFMDSharingFilter::RingHistos::operator=(const RingHistos& o)
{
+ //
+ // Assignment operator
+ //
+ // Parameters:
+ // o Object to assign from
+ //
+ // Return:
+ // Reference to this
+ //
AliForwardUtil::RingHistos::operator=(o);
fDet = o.fDet;
fRing = o.fRing;
//____________________________________________________________________
AliFMDSharingFilter::RingHistos::~RingHistos()
{
+ //
+ // Destructor
+ //
if (fBefore) delete fBefore;
if (fAfter) delete fAfter;
if (fHits) delete fHits;
void
AliFMDSharingFilter::RingHistos::Finish()
{
+ //
+ // Finish off
+ //
+ //
fHits->Fill(fNHits);
}
void
AliFMDSharingFilter::RingHistos::ScaleHistograms(TList* dir, Int_t nEvents)
{
+ //
+ // Scale the histograms to the total number of events
+ //
+ // Parameters:
+ // nEvents Number of events
+ // dir Where the output is
+ //
TList* l = GetOutputList(dir);
if (!l) return;
void
AliFMDSharingFilter::RingHistos::Output(TList* dir)
{
+ //
+ // Make output
+ //
+ // Parameters:
+ // dir where to store
+ //
TList* d = DefineOutputList(dir);
d->Add(fBefore);
d->Add(fAfter);
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff