* 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 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).
//
-// 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" // ALIFMD_H
-#include "AliFMDDigit.h" // ALIFMDDIGIT_H
-#include "AliFMDParticles.h" // ALIFMDPARTICLES_H
-#include "AliFMDReconstructor.h" // ALIFMDRECONSTRUCTOR_H
-#include "AliAltroBuffer.h" // ALIALTROBUFFER_H
-#include "AliLog.h" // ALILOG_H
-#include "AliRun.h" // ALIRUN_H
-#include "AliRunLoader.h" // ALIRUNLOADER_H
-#include "AliLoader.h" // ALILOADER_H
-#include "AliHeader.h" // ALIHEADER_H
-#include "AliGenEventHeader.h" // ALIGENEVENTHEADER_H
-#include "AliFMDRawStream.h" // ALIFMDRAWSTREAM_H
-#include "AliFMDRawReader.h" // ALIFMDRAWREADER_H
-#include "AliRawReader.h" // ALIRAWREADER_H
-#include "AliFMDReconstructionAlgorithm.h" // ALIFMDRECONSTRUCTIONALGORITHM_H
+#include <AliLog.h> // ALILOG_H
+#include <AliRun.h> // ALIRUN_H
+#include <AliRunLoader.h> // ALIRUNLOADER_H
+#include <AliHeader.h> // ALIHEADER_H
+#include <AliGenEventHeader.h> // ALIGENEVENTHEADER_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 "AliESD.h" // ALIESD_H
+#include <AliESDFMD.h> // ALIESDFMD_H
+class AliRawReader;
//____________________________________________________________________
-ClassImp(AliFMDReconstructor);
+ClassImp(AliFMDReconstructor)
+#if 0
+ ; // This is here to keep Emacs for indenting the next line
+#endif
//____________________________________________________________________
AliFMDReconstructor::AliFMDReconstructor()
: AliReconstructor(),
- fDeltaEta(0),
- fDeltaPhi(0),
- fThreshold(0),
- fPedestal(0),
- fPedestalWidth(0),
- fPedestalFactor(0)
+ fMult(0x0),
+ fNMult(0),
+ fTreeR(0x0),
+ fCurrentVertex(0),
+ fESDObj(0x0),
+ fESD(0x0)
{
- // 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.
}
//____________________________________________________________________
AliFMDReconstructor::AliFMDReconstructor(const AliFMDReconstructor& other)
- : AliReconstructor(),
- fDeltaEta(0),
- fDeltaPhi(0),
- fThreshold(0),
- fPedestal(0),
- fPedestalWidth(0),
- fPedestalFactor(0)
+ : AliReconstructor(),
+ fMult(other.fMult),
+ fNMult(other.fNMult),
+ fTreeR(other.fTreeR),
+ fCurrentVertex(other.fCurrentVertex),
+ fESDObj(other.fESDObj),
+ fESD(other.fESD)
{
- // Make a new FMD reconstructor object - default CTOR.
- SetDeltaEta(other.fDeltaEta);
- SetDeltaPhi(other.fDeltaPhi);
- SetThreshold(other.fThreshold);
- SetPedestal(other.fPedestal, other.fPedestalWidth, other.fPedestalFactor);
-
- // 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;
+ fESD = other.fESD;
return *this;
}
-
+
//____________________________________________________________________
-void
-AliFMDReconstructor::SetPedestal(Float_t mean, Float_t width, Float_t factor)
+AliFMDReconstructor::~AliFMDReconstructor()
{
- // Set the pedestal, and pedestal width
- fPedestal = mean;
- fPedestalWidth = width;
- fPedestalFactor = factor;
+ // 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");
+AliFMDReconstructor::Init(AliRunLoader* runLoader)
+{
+ // Initialize the reconstructor
+ AliDebug(1, Form("Init called with runloader 0x%x", runLoader));
+ // Initialize the geometry
+ AliFMDGeometry* geom = AliFMDGeometry::Instance();
+ geom->Init();
+ geom->InitTransformations();
+
+ // 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 that we have a run loader
+ if (!runLoader) {
+ Warning("Init", "No run loader");
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");
+ // Check if we can get the header tree
+ AliHeader* header = runLoader->GetHeader();
+ if (!header) {
+ Warning("Init", "No header");
return;
}
- fFMDLoader->LoadRecPoints("RECREATE");
- if (!fRunLoader->TreeE()) fRunLoader->LoadHeader();
-
- if (rawReader) {
- Int_t event = 0;
- while (rawReader->NextEvent()) {
- ProcessEvent(event, rawReader);
- event++;
- }
+ // Check if we can get a simulation header
+ AliGenEventHeader* eventHeader = header->GenEventHeader();
+ if (eventHeader) {
+ TArrayF vtx;
+ eventHeader->PrimaryVertex(vtx);
+ fCurrentVertex = vtx[2];
+ AliDebug(1, Form("Primary vertex Z coordinate for event # %d/%d is %f",
+ header->GetRun(), header->GetEvent(), fCurrentVertex));
+ Warning("Init", "no generator event header");
}
else {
- Int_t nEvents= Int_t(fRunLoader->TreeE()->GetEntries());
- for(Int_t event = 0; event < nEvents; event++)
- ProcessEvent(event, 0);
+ Warning("Init", "No generator event header - "
+ "perhaps we get the vertex from ESD?");
}
-
-
- fFMDLoader->UnloadRecPoints();
- fFMDLoader = 0;
- fRunLoader = 0;
- fFMD = 0;
}
//____________________________________________________________________
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
+ AliDebug(1, "Reading raw data into digits tree");
+ AliFMDRawReader rawRead(reader, digitsTree);
+ // rawRead.SetSampleRate(fFMD->GetSampleRate());
+ rawRead.Exec();
}
-
//____________________________________________________________________
void
-AliFMDReconstructor::ProcessEvent(Int_t event,
- AliRawReader* reader) const
+AliFMDReconstructor::Reconstruct(TTree* digitsTree,
+ TTree* clusterTree) 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);
- else Warning("ProcessEvent", "No GenEventHeader Found");
- fCurrentVertex = 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;
+ // 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.
+ AliDebug(1, "Reconstructing from digits in a tree");
+#if 1
+ if (fESD) {
+ const AliESDVertex* vertex = fESD->GetVertex();
+ if (vertex) {
+ AliDebug(1, Form("Got vertex from ESD: %f", vertex->GetZv()));
+ fCurrentVertex = vertex->GetZv();
}
- fFMDLoader->MakeTree("D");
- digitTree = fFMDLoader->TreeD();
-
}
- // Get the FMD branch holding the digits.
- TBranch *digitBranch = digitTree->GetBranch("FMD");
- TClonesArray* digits = fFMD->Digits();
+#endif
+ TBranch *digitBranch = digitsTree->GetBranch("FMD");
if (!digitBranch) {
- if (!reader) {
- Error("Exec", "No digit branch for the FMD found");
- return;
- }
- fFMD->MakeBranchInTree(digitTree, fFMD->GetName(), &(digits), 4000, 0);
+ Error("Exec", "No digit branch for the FMD found");
+ return;
}
- if (!reader) digitBranch->SetAddress(&digits);
+ TClonesArray* digits = new TClonesArray("AliFMDDigit");
+ digitBranch->SetAddress(&digits);
- if (reader) {
- AliFMDRawReader rawRead(fFMD, reader);
- // rawRead->SetSampleRate(fSampleRate);
- rawRead.Exec();
- }
- else {
- // 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;
- }
+ if (fMult) fMult->Clear();
+ if (fESDObj) fESDObj->Clear();
- TIter next(&fAlgorithms);
- AliFMDReconstructionAlgorithm* algorithm = 0;
- while ((algorithm = static_cast<AliFMDReconstructionAlgorithm*>(next())))
- algorithm->PreEvent();
-
+ fNMult = 0;
+ fTreeR = clusterTree;
+ fTreeR->Branch("FMD", &fMult);
+
+ AliDebug(5, "Getting entry 0 from digit branch");
+ digitBranch->GetEntry(0);
+
+ AliDebug(5, "Processing digits");
ProcessDigits(digits);
- next.Reset();
- algorithm = 0;
- while ((algorithm = static_cast<AliFMDReconstructionAlgorithm*>(next())))
- algorithm->PostEvent();
-
- if (reader) {
- digitTree->Fill();
- fFMDLoader->WriteDigits("OVERWRITE");
+ Int_t written = clusterTree->Fill();
+ AliDebug(10, Form("Filled %d bytes into cluster tree", written));
+ digits->Delete();
+ delete digits;
+}
+
+
+//____________________________________________________________________
+void
+AliFMDReconstructor::ProcessDigits(TClonesArray* digits) const
+{
+ // 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();
+ AliDebug(1, Form("Got %d digits", nDigits));
+ 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())) 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);
+
+ AliDebug(10, Form("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.
+ 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);
}
- fFMDLoader->UnloadDigits();
- fFMDLoader->TreeR()->Reset();
- fFMDLoader->TreeR()->Fill();
- fFMDLoader->WriteRecPoints("OVERWRITE");
}
//____________________________________________________________________
// load this to subtract a pedestal that was given in a database or
// something like that.
- Int_t counts = 0;
- Float_t ped = fPedestal * fPedestalFactor * fPedestalWidth;
- if (digit->Count3() >= 0) counts = digit->Count3();
- else if (digit->Count2() >= 0) counts = digit->Count2();
- else counts = digit->Count2();
- counts = TMath::Max(Int_t(counts - ped), 0);
+ Int_t counts = 0;
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ Float_t pedM = param->GetPedestal(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip());
+ AliDebug(10, Form("Subtracting pedestal %f from signal %d",
+ pedM, digit->Counts()));
+ if (digit->Count3() > 0) counts = digit->Count3();
+ else if (digit->Count2() > 0) counts = digit->Count2();
+ else counts = digit->Count1();
+ counts = TMath::Max(Int_t(counts - pedM), 0);
+ if (counts > 0) AliDebug(10, "Got a hit strip");
+
return UShort_t(counts);
}
//____________________________________________________________________
-void
-AliFMDReconstructor::ProcessDigits(TClonesArray* digits) const
+Float_t
+AliFMDReconstructor::Adc2Energy(AliFMDDigit* digit,
+ Float_t /* eta */,
+ UShort_t count) const
{
- Int_t nDigits = digits->GetEntries();
- for (Int_t i = 0; i < nDigits; i++) {
- AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
- AliFMDSubDetector* subDetector = 0;
- switch (digit->Detector()) {
- case 1: subDetector = fFMD->GetFMD1(); break;
- case 2: subDetector = fFMD->GetFMD2(); break;
- case 3: subDetector = fFMD->GetFMD3(); break;
- }
- if (!subDetector) {
- Warning("ProcessDigits", "Unknown detector: FMD%d" , digit->Detector());
- continue;
- }
-
- AliFMDRing* ring = 0;
- Float_t ringZ = 0;
- switch(digit->Ring()) {
- case 'i':
- case 'I':
- ring = subDetector->GetInner();
- ringZ = subDetector->GetInnerZ();
- break;
- case 'o':
- case 'O':
- ring = subDetector->GetOuter();
- ringZ = subDetector->GetOuterZ();
- break;
- }
- if (!ring) {
- Warning("ProcessDigits", "Unknown ring: FMD%d%c", digit->Detector(),
- digit->Ring());
- break;
- }
-
- Float_t realZ = fCurrentVertex + ringZ;
- Float_t stripR = ((ring->GetHighR() - ring->GetLowR()) / ring->GetNStrips()
- * (digit->Strip() + .5) + ring->GetLowR());
- Float_t theta = TMath::ATan2(stripR, realZ);
- Float_t phi = (2 * TMath::Pi() / ring->GetNSectors()
- * (digit->Sector() + .5));
- Float_t eta = -TMath::Log(TMath::Tan(theta / 2));
- UShort_t counts = SubtractPedestal(digit);
-
- TIter next(&fAlgorithms);
- AliFMDReconstructionAlgorithm* algorithm = 0;
- while ((algorithm = static_cast<AliFMDReconstructionAlgorithm*>(next())))
- algorithm->ProcessDigit(digit, eta, phi, counts);
- }
+ // 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.
+
+ // Double_t theta = 2 * TMath::ATan(TMath::Exp(-eta));
+ // Double_t edep = TMath::Abs(TMath::Cos(theta)) * fGain * count;
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ Float_t gain = param->GetPulseGain(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip());
+ Double_t edep = count * gain;
+ AliDebug(10, Form("Converting counts %d to energy via factor %f",
+ count, gain));
+ return edep;
}
-
//____________________________________________________________________
-void
-AliFMDReconstructor::ReconstructFromCache() const
+Float_t
+AliFMDReconstructor::Energy2Multiplicity(AliFMDDigit* /* digit */,
+ Float_t edep) 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 = fCurrentVertex + 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);
+ // 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)
+ AliDebug(10, Form("Translating energy %f to multiplicity via "
+ "divider %f->%f", edep, edepMIP, mult));
+ return mult;
+}
- AliDebug(10, Form("FMD%d%c Eta range: %f, %f %d Phi steps",
- sub->GetId(), r->GetId(), etaOut, etaIn, nPhi));
+//____________________________________________________________________
+void
+AliFMDReconstructor::PhysicalCoordinates(AliFMDDigit* digit,
+ Float_t& eta,
+ Float_t& phi) const
+{
+ // 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));
+}
- // 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));
+//____________________________________________________________________
+void
+AliFMDReconstructor::FillESD(TTree* /* digitsTree */,
+ TTree* /* clusterTree */,
+ AliESD* 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.
+ AliDebug(1, Form("Calling FillESD with two trees and one ESD"));
+ // fESDObj->Print();
+
+ if (esd) {
+ AliDebug(1, Form("Writing FMD data to ESD tree"));
+ esd->SetFMDData(fESDObj);
+ }
+}
- // 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++) emptyStrips++;
- // 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
+//____________________________________________________________________
+void
+AliFMDReconstructor::Reconstruct(AliRawReader*,TTree*) const
+{
+ // Cannot be used. See member function with same name but with 2
+ // TTree arguments. Make sure you do local reconstrucion
+ AliDebug(1, Form("Calling FillESD with loader and tree"));
+ AliError("MayNotUse");
}
-
-
//____________________________________________________________________
void
-AliFMDReconstructor::FillESD(AliRunLoader* /*fRunLoader*/,
- AliESD* /*esd*/) const
+AliFMDReconstructor::Reconstruct(AliRunLoader*) const
{
- // nothing to be done
-
+ // Cannot be used. See member function with same name but with 2
+ // TTree arguments. Make sure you do local reconstrucion
+ AliDebug(1, Form("Calling FillESD with loader"));
+ AliError("MayNotUse");
+}
+//____________________________________________________________________
+void
+AliFMDReconstructor::Reconstruct(AliRunLoader*, AliRawReader*) const
+{
+ // Cannot be used. See member function with same name but with 2
+ // TTree arguments. Make sure you do local reconstrucion
+ AliDebug(1, Form("Calling FillESD with loader and raw reader"));
+ AliError("MayNotUse");
+}
+//____________________________________________________________________
+void
+AliFMDReconstructor::FillESD(AliRawReader*,TTree*,AliESD*) const
+{
+ // Cannot be used. See member function with same name but with 2
+ // TTree arguments. Make sure you do local reconstrucion
+ AliDebug(1, Form("Calling FillESD with raw reader, tree, and ESD"));
+ AliError("MayNotUse");
+}
+//____________________________________________________________________
+void
+AliFMDReconstructor::FillESD(AliRunLoader*,AliESD*) const
+{
+ // Cannot be used. See member function with same name but with 2
+ // TTree arguments. Make sure you do local reconstrucion
+ AliDebug(1, Form("Calling FillESD with loader and ESD"));
+ AliError("MayNotUse");
+}
+//____________________________________________________________________
+void
+AliFMDReconstructor::FillESD(AliRunLoader*,AliRawReader*,AliESD*) const
+{
+ // Cannot be used. See member function with same name but with 2
+ // TTree arguments. Make sure you do local reconstrucion
+ AliDebug(1, Form("Calling FillESD with loader, raw reader, and ESD"));
+ AliError("MayNotUse");
}
//____________________________________________________________________
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff