* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-
/* $Id$ */
-
+/** @file AliFMDReconstructor.cxx
+ @author Christian Holm Christensen <cholm@nbi.dk>
+ @date Mon Mar 27 12:47:09 2006
+ @brief FMD reconstruction
+*/
//____________________________________________________________________
//
-// This is a class that constructs ReconstParticles (reconstructed
-// particles) out of Digits
-//
-//
-// This class reads either digits from a TClonesArray or raw data from
+// This is a class that constructs AliFMDRecPoint objects from of Digits
+// This class reads either digits from a TClonesArray or raw data from
// a DDL file (or similar), and stores the read ADC counts in an
-// internal cache (fAdcs).
+// internal cache (fAdcs). The rec-points are made via the naiive
+// method.
//
-// From the cached values it then calculates the number of particles
-// that hit a region of the FMDs, as specified by the user.
-//
-// The reconstruction can be done in two ways: Either via counting the
-// number of empty strips (Poisson method), or by converting the ADC
-// signal to an energy deposition, and then dividing by the typical
-// energy loss of a particle.
-//
-// Currently, this class only reads the digits from a TClonesArray,
-// and the Poission method for reconstruction.
-//
-//
//-- Authors: Evgeny Karpechev(INR) and Alla Maevsksia
// Latest changes by Christian Holm Christensen <cholm@nbi.dk>
//
//
//____________________________________________________________________
-#include "AliFMD.h"
-#include "AliFMDDigit.h"
-#include "AliFMDParticles.h"
-#include "AliFMDReconstructor.h"
-#include "AliAltroBuffer.h"
-#include "AliLog.h"
-#include "AliRun.h"
-#include "AliRunLoader.h"
-#include "AliLoader.h"
-#include "AliHeader.h"
-#include "AliGenEventHeader.h"
-#include "AliFMDRawStream.h"
-#include "AliRawReader.h"
+// #include <AliLog.h> // ALILOG_H
+// #include <AliRun.h> // ALIRUN_H
+#include "AliFMDDebug.h"
+#include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H
+#include "AliFMDParameters.h" // ALIFMDPARAMETERS_H
+#include "AliFMDDigit.h" // ALIFMDDIGIT_H
+#include "AliFMDReconstructor.h" // ALIFMDRECONSTRUCTOR_H
+#include "AliFMDRawReader.h" // ALIFMDRAWREADER_H
+#include "AliFMDRecPoint.h" // ALIFMDMULTNAIIVE_H
+#include "AliESDEvent.h" // ALIESDEVENT_H
+#include "AliESDVertex.h" // ALIESDVERTEX_H
+#include <AliESDFMD.h> // ALIESDFMD_H
+#include <TMath.h>
+#include <TH1.h>
+#include <TH2.h>
+#include <TFile.h>
+class AliRawReader;
//____________________________________________________________________
-ClassImp(AliFMDReconstructor);
+ClassImp(AliFMDReconstructor)
+#if 0
+ ; // This is here to keep Emacs for indenting the next line
+#endif
//____________________________________________________________________
AliFMDReconstructor::AliFMDReconstructor()
: AliReconstructor(),
- fAdcs(kMaxDetectors, kMaxRings, kMaxSectors, kMaxStrips),
- fDeltaEta(0),
- fDeltaPhi(0),
- fThreshold(0),
- fPedestal(0),
- fPedestalWidth(0)
+ fMult(0x0),
+ fNMult(0),
+ fTreeR(0x0),
+ fCurrentVertex(0),
+ fESDObj(0x0),
+ fNoiseFactor(0),
+ fAngleCorrect(kTRUE),
+ fVertexType(kNoVertex),
+ fESD(0x0),
+ fDiagnostics(kFALSE),
+ fDiagStep1(0),
+ fDiagStep2(0),
+ fDiagStep3(0),
+ fDiagStep4(0),
+ fDiagAll(0)
{
- // Make a new FMD reconstructor object - default CTOR.
- SetDeltaEta();
- SetDeltaPhi();
- SetThreshold();
- SetPedestal();
-
- fParticles = new TClonesArray("AliFMDParticles", 1000);
- fFMDLoader = 0;
- fRunLoader = 0;
- fFMD = 0;
+ // Make a new FMD reconstructor object - default CTOR.
+ SetNoiseFactor();
+ SetAngleCorrect();
+ if (AliDebugLevel() > 0) fDiagnostics = kTRUE;
}
//____________________________________________________________________
AliFMDReconstructor::AliFMDReconstructor(const AliFMDReconstructor& other)
- : AliReconstructor(),
- fAdcs(kMaxDetectors, kMaxRings, kMaxSectors, kMaxStrips),
- fDeltaEta(0),
- fDeltaPhi(0),
- fThreshold(0),
- fPedestal(0),
- fPedestalWidth(0)
+ : AliReconstructor(),
+ fMult(other.fMult),
+ fNMult(other.fNMult),
+ fTreeR(other.fTreeR),
+ fCurrentVertex(other.fCurrentVertex),
+ fESDObj(other.fESDObj),
+ fNoiseFactor(other.fNoiseFactor),
+ fAngleCorrect(other.fAngleCorrect),
+ fVertexType(other.fVertexType),
+ fESD(other.fESD),
+ fDiagnostics(other.fDiagnostics),
+ fDiagStep1(other.fDiagStep1),
+ fDiagStep2(other.fDiagStep2),
+ fDiagStep3(other.fDiagStep3),
+ fDiagStep4(other.fDiagStep4),
+ fDiagAll(other.fDiagAll)
{
- // Make a new FMD reconstructor object - default CTOR.
- SetDeltaEta(other.fDeltaEta);
- SetDeltaPhi(other.fDeltaPhi);
- SetThreshold(other.fThreshold);
- SetPedestal(other.fPedestal, other.fPedestalWidth);
-
- // fParticles = new TClonesArray("AliFMDParticles", 1000);
- fFMDLoader = other.fFMDLoader;
- fRunLoader = other.fRunLoader;
- fFMD = other.fFMD;
+ // Copy constructor
}
AliFMDReconstructor&
AliFMDReconstructor::operator=(const AliFMDReconstructor& other)
{
- // Make a new FMD reconstructor object - default CTOR.
- SetDeltaEta(other.fDeltaEta);
- SetDeltaPhi(other.fDeltaPhi);
- SetThreshold(other.fThreshold);
- SetPedestal(other.fPedestal, other.fPedestalWidth);
-
- // fParticles = new TClonesArray("AliFMDParticles", 1000);
- fFMDLoader = other.fFMDLoader;
- fRunLoader = other.fRunLoader;
- fFMD = other.fFMD;
-
+ // Assignment operator
+ fMult = other.fMult;
+ fNMult = other.fNMult;
+ fTreeR = other.fTreeR;
+ fCurrentVertex = other.fCurrentVertex;
+ fESDObj = other.fESDObj;
+ fNoiseFactor = other.fNoiseFactor;
+ fAngleCorrect = other.fAngleCorrect;
+ fVertexType = other.fVertexType;
+ fESD = other.fESD;
+ fDiagnostics = other.fDiagnostics;
+ fDiagStep1 = other.fDiagStep1;
+ fDiagStep2 = other.fDiagStep2;
+ fDiagStep3 = other.fDiagStep3;
+ fDiagStep4 = other.fDiagStep4;
+ fDiagAll = other.fDiagAll;
return *this;
}
-
+
//____________________________________________________________________
-void
-AliFMDReconstructor::SetPedestal(Float_t mean, Float_t width)
+AliFMDReconstructor::~AliFMDReconstructor()
{
- // Set the pedestal, and pedestal width
- fPedestal = mean;
- fPedestalWidth = width;
+ // Destructor
+ if (fMult) fMult->Delete();
+ if (fMult) delete fMult;
+ if (fESDObj) delete fESDObj;
}
//____________________________________________________________________
void
-AliFMDReconstructor::Reconstruct(AliRunLoader* runLoader,
- AliRawReader* rawReader) const
-{
- // Collects all digits in the same active volume into number of
- // particles
- //
- // Reconstruct number of particles in given group of pads for given
- // FMDvolume determined by numberOfVolume,
- // numberOfMinSector, numberOfMaxSector, numberOfMinRing,
- // numberOgMaxRing
- //
- // The reconstruction method is choosen based on the number of empty
- // strips.
- fParticles->Clear();
- if (!runLoader) {
- Error("Exec","Run Loader loader is NULL - Session not opened");
- return;
- }
- fRunLoader = runLoader;
- fFMDLoader = runLoader->GetLoader("FMDLoader");
- if (!fFMDLoader)
- Fatal("AliFMDReconstructor","Can not find FMD (loader) "
- "in specified event");
-
- // Get the AliRun object
- if (!fRunLoader->GetAliRun()) fRunLoader->LoadgAlice();
-
- // Get the AliFMD object
- fFMD = static_cast<AliFMD*>(fRunLoader->GetAliRun()->GetDetector("FMD"));
- if (!fFMD) {
- AliError("Can not get FMD from gAlice");
- return;
- }
- fFMDLoader->LoadRecPoints("RECREATE");
-
- if (!fRunLoader->TreeE()) fRunLoader->LoadHeader();
-
- TClonesArray* digits = fFMD->Digits();
- if (rawReader) {
- Int_t event = 0;
- while (rawReader->NextEvent()) {
- ProcessEvent(event, rawReader, digits);
- event++;
- }
- }
- else {
- Int_t nEvents= Int_t(fRunLoader->TreeE()->GetEntries());
- for(Int_t event = 0; event < nEvents; event++)
- ProcessEvent(event, 0, digits);
- }
+AliFMDReconstructor::Init()
+{
+ // Initialize the reconstructor
+ // Initialize the geometry
+ AliFMDGeometry* geom = AliFMDGeometry::Instance();
+ geom->Init();
+ geom->InitTransformations();
- fFMDLoader->UnloadRecPoints();
- fFMDLoader = 0;
- fRunLoader = 0;
- fFMD = 0;
+ // Initialize the parameters
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ param->Init();
+
+ // Current vertex position
+ fCurrentVertex = 0;
+ // Create array of reconstructed strip multiplicities
+ fMult = new TClonesArray("AliFMDRecPoint", 51200);
+ // Create ESD output object
+ fESDObj = new AliESDFMD;
+
+ // Check if we need diagnostics histograms
+ if (!fDiagnostics) return;
+ AliInfo("Making diagnostics histograms");
+ fDiagStep1 = new TH2I("diagStep1", "Read ADC vs. Noise surpressed ADC",
+ 1024, -.5, 1023.5, 1024, -.5, 1023.5);
+ fDiagStep1->SetDirectory(0);
+ fDiagStep1->GetXaxis()->SetTitle("ADC (read)");
+ fDiagStep1->GetYaxis()->SetTitle(Form("ADC (noise surpressed %4.f)",
+ fNoiseFactor));
+ fDiagStep2 = new TH2F("diagStep2", "ADC vs Edep deduced",
+ 1024, -.5, 1023.5, 100, 0, 2);
+ fDiagStep2->SetDirectory(0);
+ fDiagStep2->GetXaxis()->SetTitle("ADC (noise surpressed)");
+ fDiagStep2->GetYaxis()->SetTitle("#Delta E [GeV]");
+ fDiagStep3 = new TH2F("diagStep3", "Edep vs Edep path corrected",
+ 100, 0., 2., 100, 0., 2.);
+ fDiagStep3->SetDirectory(0);
+ fDiagStep3->GetXaxis()->SetTitle("#Delta E [GeV]");
+ fDiagStep3->GetYaxis()->SetTitle("#Delta E/#Delta x #times #delta x [GeV]");
+ fDiagStep4 = new TH2F("diagStep4", "Edep vs Multiplicity deduced",
+ 100, 0., 2., 100, -.1, 19.9);
+ fDiagStep4->SetDirectory(0);
+ fDiagStep4->GetXaxis()->SetTitle("#Delta E/#Delta x #times #delta x [GeV]");
+ fDiagStep4->GetYaxis()->SetTitle("Multiplicity");
+ fDiagAll = new TH2F("diagAll", "Read ADC vs Multiplicity deduced",
+ 1024, -.5, 1023.5, 100, -.1, 19.9);
+ fDiagAll->SetDirectory(0);
+ fDiagAll->GetXaxis()->SetTitle("ADC (read)");
+ fDiagAll->GetYaxis()->SetTitle("Multiplicity");
}
//____________________________________________________________________
void
-AliFMDReconstructor::Reconstruct(AliRunLoader* runLoader) const
-{
- // Collects all digits in the same active volume into number of
- // particles
- //
- // Reconstruct number of particles in given group of pads for given
- // FMDvolume determined by numberOfVolume,
- // numberOfMinSector, numberOfMaxSector, numberOfMinRing,
- // numberOgMaxRing
- //
- // The reconstruction method is choosen based on the number of empty
- // strips.
- Reconstruct(runLoader, 0);
+AliFMDReconstructor::ConvertDigits(AliRawReader* reader,
+ TTree* digitsTree) const
+{
+ // Convert Raw digits to AliFMDDigit's in a tree
+ AliFMDDebug(2, ("Reading raw data into digits tree"));
+ AliFMDRawReader rawRead(reader, digitsTree);
+ // rawRead.SetSampleRate(fFMD->GetSampleRate());
+ rawRead.Exec();
}
-
//____________________________________________________________________
void
-AliFMDReconstructor::ProcessEvent(Int_t event,
- AliRawReader* reader,
- TClonesArray* digits) const
+AliFMDReconstructor::GetVertex() const
{
- // Process one event read from either a clones array or from a a raw
- // data reader.
- fRunLoader->GetEvent(event) ;
- //event z-vertex for correction eta-rad dependence
- AliHeader *header = fRunLoader->GetHeader();
- if (!header)
- Warning("ProcessEvent", "no AliHeader found!");
- AliGenEventHeader* genHeader = (header ? header->GenEventHeader() : 0);
-
- // Get the Z--coordinate from the event header
- TArrayF o(3);
- if (genHeader) genHeader->PrimaryVertex(o);
- Float_t zVertex = o.At(2);
-
- // If the recontruction tree isn't loaded, load it
- if(fFMDLoader->TreeR()==0) fFMDLoader->MakeTree("R");
-
- //Make branches to hold the reconstructed particles
- const Int_t kBufferSize = 16000;
- fFMDLoader->TreeR()->Branch("FMD", &fParticles, kBufferSize);
-
- // Load or recreate the digits
- if (fFMDLoader->LoadDigits((reader ? "UPDATE" : "READ"))) {
- if (!reader) {
- Error("Exec","Error occured while loading digits. Exiting.");
- return;
- }
-
- }
- // Get the digits tree
- TTree* digitTree = fFMDLoader->TreeD();
- if (!digitTree) {
- if (!reader) {
- Error("Exec","Can not get Tree with Digits. "
- "Nothing to reconstruct - Exiting");
+ // Return the vertex to use.
+ // This is obtained from the ESD object.
+ // If not found, a warning is issued.
+ fVertexType = kNoVertex;
+ fCurrentVertex = 0;
+ if (fESD) {
+ const AliESDVertex* vertex = fESD->GetVertex();
+ if (vertex) {
+ AliFMDDebug(2, ("Got vertex from ESD: %f", vertex->GetZv()));
+ fCurrentVertex = vertex->GetZv();
+ fVertexType = kESDVertex;
return;
}
- fFMDLoader->MakeTree("D");
- digitTree = fFMDLoader->TreeD();
-
- }
- // Get the FMD branch holding the digits.
- TBranch *digitBranch = digitTree->GetBranch("FMD");
- if (!digitBranch) {
- if (!reader) {
- Error("Exec", "No digit branch for the FMD found");
- return;
- }
- fFMD->MakeBranchInTree(digitTree, fFMD->GetName(), &(digits), 4000, 0);
- }
- if (!reader) digitBranch->SetAddress(&digits);
-
- fEmptyStrips = 0;
- fTotalStrips = 0;
- Bool_t ok = kFALSE;
- if (reader) ok = ReadAdcs(reader);
- else if (digits) ok = ReadAdcs(digits);
- if (!ok) return;
-
- ReconstructFromCache(zVertex);
-
- if (reader) {
- digitTree->Fill();
- fFMDLoader->WriteDigits("OVERWRITE");
}
- fFMDLoader->UnloadDigits();
- fFMDLoader->TreeR()->Reset();
- fFMDLoader->TreeR()->Fill();
- fFMDLoader->WriteRecPoints("OVERWRITE");
+ AliWarning("Didn't get any vertex from ESD or generator");
}
+
//____________________________________________________________________
-Bool_t
-AliFMDReconstructor::ReadAdcs(TClonesArray* digits) const
+void
+AliFMDReconstructor::Reconstruct(AliRawReader* /*reader*/, TTree*) const
{
- // Read the ADC values from a clones array.
- AliDebug(10, "Reading ADCs from Digits array");
- // read Digits, and reconstruct the particles
- if (!fFMDLoader->TreeD()->GetEvent(0)) return kFALSE;
-
- // Reads the digits from the array, and fills up the cache (fAdcs)
- fAdcs.Clear();
- Int_t nDigits = digits->GetEntries();
- for (Int_t digit = 0; digit < nDigits; digit++) {
- AliFMDDigit* fmdDigit =
- static_cast<AliFMDDigit*>(digits->UncheckedAt(digit));
-
- ProcessDigit(fmdDigit);
- } //digit loop
- return kTRUE;
+ // Reconstruct directly from raw data (no intermediate output on
+ // digit tree or rec point tree).
+ // Parameters:
+ // reader Raw event reader
+ // ctree Not used.
+ AliError("Method is not used");
+#if 0
+ TClonesArray* array = new TClonesArray("AliFMDDigit");
+ AliFMDRawReader rawRead(reader, 0);
+ rawRead.ReadAdcs(array);
+ ProcessDigits(array);
+ array->Delete();
+ delete array;
+#endif
}
//____________________________________________________________________
-Bool_t
-AliFMDReconstructor::ReadAdcs(AliRawReader* reader) const
+void
+AliFMDReconstructor::Reconstruct(TTree* digitsTree,
+ TTree* clusterTree) const
{
- // Read the ADC values from a raw data reader.
- AliDebug(10, "Reading ADCs from RawReader");
- // Reads the digits from a RAW data
- fAdcs.Clear();
- // reader->Reset();
-
- if (!reader->ReadHeader()) {
- Error("ReadAdcs", "Couldn't read header");
- return kFALSE;
+ // Reconstruct event from digits in tree
+ // Get the FMD branch holding the digits.
+ // FIXME: The vertex may not be known yet, so we may have to move
+ // some of this to FillESD.
+ AliFMDDebug(2, ("Reconstructing from digits in a tree"));
+ GetVertex();
+
+ TBranch *digitBranch = digitsTree->GetBranch("FMD");
+ if (!digitBranch) {
+ Error("Exec", "No digit branch for the FMD found");
+ return;
}
+ TClonesArray* digits = new TClonesArray("AliFMDDigit");
+ digitBranch->SetAddress(&digits);
- // Use AliAltroRawStream to read the ALTRO format. No need to
- // reinvent the wheel :-)
- AliFMDRawStream input(reader);
- // Select FMD DDL's
- reader->Select(AliFMD::kBaseDDL >> 8);
+ if (fMult) fMult->Clear();
+ if (fESDObj) fESDObj->Clear();
- Int_t oldDDL = -1;
- Int_t count = 0;
- UShort_t detector = 1; // Must be one here
- UShort_t oldDetector = 0;
- // Loop over data in file
- Bool_t next = kTRUE;
-
- // local Cache
- TArrayI counts(10);
- counts.Reset(-1);
- Int_t offset = 0;
+ fNMult = 0;
+ fTreeR = clusterTree;
+ fTreeR->Branch("FMD", &fMult);
- while (next) {
- next = input.Next();
-
-
- count++;
- Int_t ddl = reader->GetDDLID();
- if (ddl != oldDDL
- || input.IsNewStrip()
- || !next) {
- // Make a new digit, if we have some data!
- if (counts[0] >= 0) {
- // Got a new strip.
- AliDebug(10, Form("Add a new strip: FMD%d%c[%2d,%3d] "
- "(current: FMD%d%c[%2d,%3d])",
- oldDetector, input.PrevRing(),
- input.PrevSector() , input.PrevStrip(),
- detector , input.Ring(), input.Sector(),
- input.Strip()));
- fFMD->AddDigit(oldDetector,
- input.PrevRing(),
- input.PrevSector(),
- input.PrevStrip(),
- counts[0], counts[1], counts[2]);
- AliFMDDigit* digit =
- static_cast<AliFMDDigit*>(fFMD->Digits()->
- UncheckedAt(fFMD->GetNdigits()-1));
- ProcessDigit(digit);
- }
-
- if (!next) {
- AliDebug(10, Form("Read %d channels for FMD%d",
- count + 1, detector));
- break;
- }
-
-
- // If we got a new DDL, it means we have a new detector.
- if (ddl != oldDDL) {
- if (detector != 0)
- AliDebug(10, Form("Read %d channels for FMD%d",
- count + 1, detector));
- // Reset counts, and update the DDL cache
- count = 0;
- oldDDL = ddl;
- // Check that we're processing a FMD detector
- Int_t detId = reader->GetDetectorID();
- if (detId != (AliFMD::kBaseDDL >> 8)) {
- Error("ReadAdcs", "Detector ID %d != %d",
- detId, (AliFMD::kBaseDDL >> 8));
- break;
- }
- // Figure out what detector we're deling with
- oldDetector = detector;
- switch (ddl) {
- case 0: detector = 1; break;
- case 1: detector = 2; break;
- case 2: detector = 3; break;
- default:
- Error("ReadAdcs", "Unknown DDL 0x%x for FMD", ddl);
- return kFALSE;
- }
- AliDebug(10, Form("Reading ADCs for 0x%x - That is FMD%d",
- reader->GetEquipmentId(), detector));
- }
- counts.Reset(-1);
- offset = 0;
- }
-
- counts[offset] = input.Count();
- offset++;
-
- AliDebug(10, Form("ADC of FMD%d%c[%2d,%3d] += %d",
- detector, input.Ring(), input.Sector(),
- input.Strip(), input.Count()));
- oldDetector = detector;
- }
- return kTRUE;
+ AliFMDDebug(5, ("Getting entry 0 from digit branch"));
+ digitBranch->GetEntry(0);
+
+ AliFMDDebug(5, ("Processing digits"));
+ ProcessDigits(digits);
+
+ Int_t written = clusterTree->Fill();
+ AliFMDDebug(10, ("Filled %d bytes into cluster tree", written));
+ digits->Delete();
+ delete digits;
}
+
//____________________________________________________________________
void
-AliFMDReconstructor::ProcessDigit(AliFMDDigit* digit) const
+AliFMDReconstructor::ProcessDigits(TClonesArray* digits) const
{
- // Process a digit. Derived classes can overload this member
- // function to do stuff to the digit. However, it should write the
- // ADC count to the internal cache
- //
- // fAdcs(detector - 1, ring, sector, strip) = counts;
- //
- // In this implementation, we count the number of strips below
- // threshold. This we do to later choose what kind of
- // reconstruction algorithm we'd like to use.
- //
- UShort_t detector = digit->Detector();
- Char_t ring = digit->Ring();
- UShort_t sector = digit->Sector();
- UShort_t strip = digit->Strip();
-
- UShort_t counts = SubtractPedestal(digit);
-
- fAdcs(detector - 1, ring, sector, strip) = counts;
- if (counts < fThreshold) fEmptyStrips++;
- fTotalStrips++;
+ // For each digit, find the pseudo rapdity, azimuthal angle, and
+ // number of corrected ADC counts, and pass it on to the algorithms
+ // used.
+ Int_t nDigits = digits->GetEntries();
+ AliFMDDebug(1, ("Got %d digits", nDigits));
+ fESDObj->SetNoiseFactor(fNoiseFactor);
+ fESDObj->SetAngleCorrected(fAngleCorrect);
+ for (Int_t i = 0; i < nDigits; i++) {
+ AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ // Check that the strip is not marked as dead
+ if (param->IsDead(digit->Detector(), digit->Ring(),
+ digit->Sector(), digit->Strip())) {
+ AliFMDDebug(10, ("FMD%d%c[%2d,%3d] is dead", digit->Detector(),
+ digit->Ring(), digit->Sector(), digit->Strip()));
+ continue;
+ }
+
+ // digit->Print();
+ // Get eta and phi
+ Float_t eta, phi;
+ PhysicalCoordinates(digit, eta, phi);
+
+ // Substract pedestal.
+ UShort_t counts = SubtractPedestal(digit);
+
+ // Gain match digits.
+ Double_t edep = Adc2Energy(digit, eta, counts);
+
+ // Make rough multiplicity
+ Double_t mult = Energy2Multiplicity(digit, edep);
+
+ AliFMDDebug(10, ("FMD%d%c[%2d,%3d]: "
+ "ADC: %d, Counts: %d, Energy: %f, Mult: %f",
+ digit->Detector(), digit->Ring(), digit->Sector(),
+ digit->Strip(), digit->Counts(), counts, edep, mult));
+
+ // Create a `RecPoint' on the output branch.
+ if (fMult) {
+ AliFMDRecPoint* m =
+ new ((*fMult)[fNMult]) AliFMDRecPoint(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip(),
+ eta, phi,
+ edep, mult);
+ (void)m; // Suppress warnings about unused variables.
+ fNMult++;
+ }
+
+ fESDObj->SetMultiplicity(digit->Detector(), digit->Ring(),
+ digit->Sector(), digit->Strip(), mult);
+ fESDObj->SetEta(digit->Detector(), digit->Ring(),
+ digit->Sector(), digit->Strip(), eta);
+
+ if (fDiagAll) fDiagAll->Fill(digit->Counts(), mult);
+ }
}
//____________________________________________________________________
// load this to subtract a pedestal that was given in a database or
// something like that.
- Int_t counts =
- TMath::Max(Int_t(digit->Count1() - fPedestal - 3 * fPedestalWidth), 0);
- if (digit->Count2() >= 0)
- counts +=
- TMath::Max(Int_t(digit->Count2() - fPedestal - 3 * fPedestalWidth), 0);
- if (digit->Count3() >= 0)
- counts +=
- TMath::Max(Int_t(digit->Count3() - fPedestal - 3 * fPedestalWidth), 0);
-
- if (counts < 0) counts = 0;
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ Float_t ped = param->GetPedestal(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip());
+ Float_t noise = param->GetPedestalWidth(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip());
+ AliFMDDebug(15, ("Subtracting pedestal %f from signal %d",
+ ped, digit->Counts()));
+ // if (digit->Count3() > 0) adc = digit->Count3();
+ // else if (digit->Count2() > 0) adc = digit->Count2();
+ // else adc = digit->Count1();
+ Int_t adc = digit->Counts();
+ Int_t counts = TMath::Max(Int_t(adc - ped), 0);
+ if (counts < noise * fNoiseFactor) counts = 0;
+ if (counts > 0) AliFMDDebug(15, ("Got a hit strip"));
+ if (fDiagStep1) fDiagStep1->Fill(adc, counts);
+
return UShort_t(counts);
}
+//____________________________________________________________________
+Float_t
+AliFMDReconstructor::Adc2Energy(AliFMDDigit* digit,
+ Float_t eta,
+ UShort_t count) const
+{
+ // Converts number of ADC counts to energy deposited.
+ // Note, that this member function can be overloaded by derived
+ // classes to do strip-specific look-ups in databases or the like,
+ // to find the proper gain for a strip.
+ //
+ // In this simple version, we calculate the energy deposited as
+ //
+ // EnergyDeposited = cos(theta) * gain * count
+ //
+ // where
+ //
+ // Pre_amp_MIP_Range
+ // gain = ----------------- * Energy_deposited_per_MIP
+ // ADC_channel_size
+ //
+ // is constant and the same for all strips.
+ if (count <= 0) return 0;
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ Float_t gain = param->GetPulseGain(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip());
+ AliFMDDebug(15, ("Converting counts %d to energy via factor %f",
+ count, gain));
+
+ Double_t edep = count * gain;
+ if (fDiagStep2) fDiagStep2->Fill(count, edep);
+ if (fAngleCorrect) {
+ Double_t theta = 2 * TMath::ATan(TMath::Exp(-eta));
+ Double_t corr = TMath::Abs(TMath::Cos(theta));
+ Double_t cedep = corr * edep;
+ AliFMDDebug(10, ("correcting for path %f * %f = %f (eta=%f, theta=%f)",
+ edep, corr, cedep, eta, theta));
+ if (fDiagStep3) fDiagStep3->Fill(edep, cedep);
+ edep = cedep;
+ }
+ return edep;
+}
+
+//____________________________________________________________________
+Float_t
+AliFMDReconstructor::Energy2Multiplicity(AliFMDDigit* /* digit */,
+ Float_t edep) const
+{
+ // Converts an energy signal to number of particles.
+ // Note, that this member function can be overloaded by derived
+ // classes to do strip-specific look-ups in databases or the like,
+ // to find the proper gain for a strip.
+ //
+ // In this simple version, we calculate the multiplicity as
+ //
+ // multiplicity = Energy_deposited / Energy_deposited_per_MIP
+ //
+ // where
+ //
+ // Energy_deposited_per_MIP = 1.664 * SI_density * SI_thickness
+ //
+ // is constant and the same for all strips
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ Double_t edepMIP = param->GetEdepMip();
+ Float_t mult = edep / edepMIP;
+ if (edep > 0)
+ AliFMDDebug(15, ("Translating energy %f to multiplicity via "
+ "divider %f->%f", edep, edepMIP, mult));
+ if (fDiagStep4) fDiagStep4->Fill(edep, mult);
+ return mult;
+}
+
//____________________________________________________________________
void
-AliFMDReconstructor::ReconstructFromCache(Float_t zVertex) const
+AliFMDReconstructor::PhysicalCoordinates(AliFMDDigit* digit,
+ Float_t& eta,
+ Float_t& phi) const
{
- // Based on the information in the cache, do the reconstruction.
- Int_t nRecon = 0;
- // Loop over the detectors
- for (Int_t i = 1; i <= 3; i++) {
- AliFMDSubDetector* sub = 0;
- switch (i) {
- case 1: sub = fFMD->GetFMD1(); break;
- case 2: sub = fFMD->GetFMD2(); break;
- case 3: sub = fFMD->GetFMD3(); break;
- }
- if (!sub) continue;
-
- // Loop over the rings in the detector
- for (Int_t j = 0; j < 2; j++) {
- Float_t rZ = 0;
- AliFMDRing* r = 0;
- switch (j) {
- case 0: r = sub->GetInner(); rZ = sub->GetInnerZ(); break;
- case 1: r = sub->GetOuter(); rZ = sub->GetOuterZ(); break;
- }
- if (!r) continue;
-
- // Calculate low/high theta and eta
- // FIXME: Is this right?
- Float_t realZ = zVertex + rZ;
- Float_t thetaOut = TMath::ATan2(r->GetHighR(), realZ);
- Float_t thetaIn = TMath::ATan2(r->GetLowR(), realZ);
- Float_t etaOut = - TMath::Log(TMath::Tan(thetaOut / 2));
- Float_t etaIn = - TMath::Log(TMath::Tan(thetaIn / 2));
- if (TMath::Abs(etaOut) > TMath::Abs(etaIn)) {
- Float_t tmp = etaIn;
- etaIn = etaOut;
- etaOut = tmp;
- }
-
- //-------------------------------------------------------------
- //
- // Here starts poisson method
- //
- // Calculate eta step per strip, number of eta steps, number of
- // phi steps, and check the sign of the eta increment
- Float_t stripEta = (Float_t(r->GetNStrips()) / (etaIn - etaOut));
- Int_t nEta = Int_t(TMath::Abs(etaIn - etaOut) / fDeltaEta);
- Int_t nPhi = Int_t(360. / fDeltaPhi);
- Float_t sign = TMath::Sign(Float_t(1.), etaIn);
-
- AliDebug(10, Form("FMD%d%c Eta range: %f, %f %d Phi steps",
- sub->GetId(), r->GetId(), etaOut, etaIn, nPhi));
-
- // Loop over relevant phi values
- for (Int_t p = 0; p < nPhi; p++) {
- Float_t minPhi = p * fDeltaPhi;
- Float_t maxPhi = minPhi + fDeltaPhi;
- UShort_t minSector = UShort_t(minPhi / 360) * r->GetNSectors();
- UShort_t maxSector = UShort_t(maxPhi / 360) * r->GetNSectors();
-
- AliDebug(10, Form(" Now in phi range %f, %f (sectors %d,%d)",
- minPhi, maxPhi, minSector, maxSector));
- // Loop over relevant eta values
- for (Int_t e = nEta; e >= 0; --e) {
- Float_t maxEta = etaIn - sign * e * fDeltaEta;
- Float_t minEta = maxEta - sign * fDeltaEta;
- if (sign > 0) minEta = TMath::Max(minEta, etaOut);
- else minEta = TMath::Min(minEta, etaOut);
- Float_t theta1 = 2 * TMath::ATan(TMath::Exp(-minEta));
- Float_t theta2 = 2 * TMath::ATan(TMath::Exp(-maxEta));
- Float_t minR = TMath::Abs(realZ * TMath::Tan(theta2));
- Float_t maxR = TMath::Abs(realZ * TMath::Tan(theta1));
- UShort_t minStrip = UShort_t((etaIn - maxEta) * stripEta + 0.5);
- UShort_t maxStrip = UShort_t((etaIn - minEta) * stripEta + 0.5);
-
- AliDebug(10, Form(" Now in eta range %f, %f (strips %d, %d)\n"
- " [radii %f, %f, thetas %f, %f, sign %d]",
- minEta, maxEta, minStrip, maxStrip,
- minR, maxR, theta1, theta2, sign));
-
- // Count number of empty strips
- Int_t emptyStrips = 0;
- for (Int_t sector = minSector; sector < maxSector; sector++)
- for (Int_t strip = minStrip; strip < maxStrip; strip++)
- if (fAdcs(sub->GetId() - 1, r->GetId(), sector, strip)
- < fThreshold) emptyStrips++;
-
- // The total number of strips
- Float_t nTotal = (maxSector - minSector) * (maxStrip - minStrip);
-
- // Log ratio of empty to total number of strips
- AliDebug(10, Form("Lambda= %d / %d = %f",
- emptyStrips, nTotal,
- Float_t(emptyStrips) / nTotal));
-
- Double_t lambda = (emptyStrips > 0 ?
- - TMath::Log(Double_t(emptyStrips) / nTotal) :
- 1);
-
- // The reconstructed number of particles is then given by
- Int_t reconstructed = Int_t(lambda * nTotal + 0.5);
-
- // Add a AliFMDParticles to the reconstruction tree.
- new((*fParticles)[nRecon])
- AliFMDParticles(sub->GetId(), r->GetId(),
- minSector, maxSector, minStrip, maxStrip,
- minEta, maxEta, minPhi, maxPhi,
- reconstructed, AliFMDParticles::kPoission);
- nRecon++;
- } // phi
- } // eta
- } // ring
- } // detector
+ // Get the eta and phi of a digit
+ //
+ // Get geometry.
+ AliFMDGeometry* geom = AliFMDGeometry::Instance();
+ Double_t x, y, z, r, theta;
+ geom->Detector2XYZ(digit->Detector(), digit->Ring(), digit->Sector(),
+ digit->Strip(), x, y, z);
+ // Correct for vertex offset.
+ z += fCurrentVertex;
+ phi = TMath::ATan2(y, x);
+ r = TMath::Sqrt(y * y + x * x);
+ theta = TMath::ATan2(r, z);
+ eta = -TMath::Log(TMath::Tan(theta / 2));
}
-
+
+
//____________________________________________________________________
void
-AliFMDReconstructor::FillESD(AliRunLoader* /*fRunLoader*/,
- AliESD* /*esd*/) const
+AliFMDReconstructor::FillESD(TTree* /* digitsTree */,
+ TTree* /* clusterTree */,
+ AliESDEvent* esd) const
{
// nothing to be done
+ // FIXME: The vertex may not be known when Reconstruct is executed,
+ // so we may have to move some of that member function here.
+ AliFMDDebug(2, ("Calling FillESD with two trees and one ESD"));
+ // fESDObj->Print();
+
+ if (esd) {
+ AliFMDDebug(2, ("Writing FMD data to ESD tree"));
+ esd->SetFMDData(fESDObj);
+ }
+
+ if (!fDiagnostics || !esd) return;
+ static bool first = true;
+ // This is most likely NOT the event number you'd like to use. It
+ // has nothing to do with the 'real' event number.
+ // - That's OK. We just use it for the name of the directory -
+ // nothing else. Christian
+ Int_t evno = esd->GetEventNumberInFile();
+ AliFMDDebug(1, ("Writing diagnostics histograms to FMD.Diag.root/%03d",evno));
+ TFile f("FMD.Diag.root", (first ? "RECREATE" : "UPDATE"));
+ first = false;
+ f.cd();
+ TDirectory* d = f.mkdir(Form("%03d", evno),
+ Form("Diagnostics histograms for event # %d", evno));
+ d->cd();
+ if (fDiagStep1) fDiagStep1->Write();
+ if (fDiagStep2) fDiagStep2->Write();
+ if (fDiagStep3) fDiagStep3->Write();
+ if (fDiagStep4) fDiagStep4->Write();
+ if (fDiagAll) fDiagAll->Write();
+ d->Write();
+ f.Write();
+ f.Close();
+
+ if (fDiagStep1) fDiagStep1->Reset();
+ if (fDiagStep2) fDiagStep2->Reset();
+ if (fDiagStep3) fDiagStep3->Reset();
+ if (fDiagStep4) fDiagStep4->Reset();
+ if (fDiagAll) fDiagAll->Reset();
+}
+//____________________________________________________________________
+void
+AliFMDReconstructor::FillESD(AliRawReader*, TTree* clusterTree,
+ AliESDEvent* esd) const
+{
+ TTree* dummy = 0;
+ FillESD(dummy, clusterTree, esd);
}
//____________________________________________________________________
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff