* 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 AliFMDMult (reconstructed
-// multiplicity) from 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.
-//
-// +---------------------+ +---------------------+
-// | AliFMDReconstructor |<>-----| AliFMDMultAlgorithm |
-// +---------------------+ +---------------------+
-// ^
-// |
-// +-----------+---------+
-// | |
-// +-------------------+ +------------------+
-// | AliFMDMultPoisson | | AliFMDMultNaiive |
-// +-------------------+ +------------------+
-//
-// AliFMDReconstructor acts as a manager class. It contains a list of
-// AliFMDMultAlgorithm objects. The call graph looks something like
-//
-//
-// +----------------------+ +----------------------+
-// | :AliFMDReconstructor | | :AliFMDMultAlgorithm |
-// +----------------------+ +----------------------+
-// | |
-// Reconstruct +-+ |
-// ------------>| | PreRun +-+
-// | |------------------------------->| |
-// | | +-+
-// | |-----+ (for each event) |
-// | | | *ProcessEvent |
-// |+-+ | |
-// || |<---+ PreEvent +-+
-// || |------------------------------>| |
-// || | +-+
-// || |-----+ |
-// || | | ProcessDigits |
-// ||+-+ | |
-// ||| |<---+ |
-// ||| | *ProcessDigit(digit) +-+
-// ||| |----------------------------->| |
-// ||| | +-+
-// ||+-+ |
-// || | PostEvent +-+
-// || |------------------------------>| |
-// || | +-+
-// |+-+ |
-// | | PostRun +-+
-// | |------------------------------->| |
-// | | +-+
-// +-+ |
-// | |
-//
-//
-//
//-- Authors: Evgeny Karpechev(INR) and Alla Maevsksia
// Latest changes by Christian Holm Christensen <cholm@nbi.dk>
//
#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 <AliRawReader.h> // ALIRAWREADER_H
#include <AliGenEventHeader.h> // ALIGENEVENTHEADER_H
-#include "AliFMD.h" // ALIFMD_H
#include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H
#include "AliFMDParameters.h" // ALIFMDPARAMETERS_H
-#include "AliFMDDetector.h" // ALIFMDDETECTOR_H
-#include "AliFMDRing.h" // ALIFMDRING_H
#include "AliFMDDigit.h" // ALIFMDDIGIT_H
#include "AliFMDReconstructor.h" // ALIFMDRECONSTRUCTOR_H
-#include "AliFMDRawStream.h" // ALIFMDRAWSTREAM_H
#include "AliFMDRawReader.h" // ALIFMDRAWREADER_H
-#include "AliFMDMultAlgorithm.h" // ALIFMDMULTALGORITHM_H
-#include "AliFMDMultPoisson.h" // ALIFMDMULTPOISSON_H
-#include "AliFMDMultNaiive.h" // ALIFMDMULTNAIIVE_H
+#include "AliFMDRecPoint.h" // ALIFMDMULTNAIIVE_H
+#include "AliESD.h" // ALIESD_H
+#include <AliESDFMD.h> // ALIESDFMD_H
+class AliRawReader;
//____________________________________________________________________
ClassImp(AliFMDReconstructor)
//____________________________________________________________________
AliFMDReconstructor::AliFMDReconstructor()
: AliReconstructor(),
- 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.
- AliFMDParameters* pars = AliFMDParameters::Instance();
- fPedestal = pars->GetPedestal();
- fPedestalWidth = pars->GetPedestalWidth();
- fPedestalFactor = pars->GetPedestalFactor();
-
- fAlgorithms.Add(new AliFMDMultNaiive);
- fAlgorithms.Add(new AliFMDMultPoisson);
-
- TIter next(&fAlgorithms);
- AliFMDMultAlgorithm* algorithm = 0;
- while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
- algorithm->PreRun(0);
+ // Make a new FMD reconstructor object - default CTOR.
}
//____________________________________________________________________
AliFMDReconstructor::AliFMDReconstructor(const AliFMDReconstructor& other)
- : AliReconstructor(),
- 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)
{
// Copy constructor
- fPedestal = other.fPedestal;
- fPedestalWidth = other.fPedestalWidth;
- fPedestalFactor = other.fPedestalFactor;
-
-
- fAlgorithms.Delete();
- TIter next(&(other.fAlgorithms));
- AliFMDMultAlgorithm* algorithm = 0;
- while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
- fAlgorithms.Add(algorithm);
- fAlgorithms.SetOwner(kFALSE);
}
AliFMDReconstructor::operator=(const AliFMDReconstructor& other)
{
// Assignment operator
- fPedestal = other.fPedestal;
- fPedestalWidth = other.fPedestalWidth;
- fPedestalFactor = other.fPedestalFactor;
-
- fAlgorithms.Delete();
- TIter next(&(other.fAlgorithms));
- AliFMDMultAlgorithm* algorithm = 0;
- while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
- fAlgorithms.Add(algorithm);
- fAlgorithms.SetOwner(kFALSE);
-
+ fMult = other.fMult;
+ fNMult = other.fNMult;
+ fTreeR = other.fTreeR;
+ fCurrentVertex = other.fCurrentVertex;
+ fESDObj = other.fESDObj;
+ fESD = other.fESD;
return *this;
}
AliFMDReconstructor::~AliFMDReconstructor()
{
// Destructor
- fAlgorithms.Delete();
+ if (fMult) fMult->Delete();
+ if (fMult) delete fMult;
+ if (fESDObj) delete fESDObj;
}
//____________________________________________________________________
{
// 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;
}
+
+ // Check if we can get the header tree
AliHeader* header = runLoader->GetHeader();
if (!header) {
Warning("Init", "No header");
return;
}
+
+ // Check if we can get a simulation header
AliGenEventHeader* eventHeader = header->GenEventHeader();
- if (!eventHeader) {
- Warning("Init", "no event header");
- return;
+ 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 {
+ Warning("Init", "No generator event header - "
+ "perhaps we get the vertex from ESD?");
}
- 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));
}
//____________________________________________________________________
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();
// 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();
+ }
+ }
+#endif
TBranch *digitBranch = digitsTree->GetBranch("FMD");
- TClonesArray* digits = new TClonesArray("AliFMDDigit");
if (!digitBranch) {
Error("Exec", "No digit branch for the FMD found");
return;
}
+ TClonesArray* digits = new TClonesArray("AliFMDDigit");
digitBranch->SetAddress(&digits);
- TIter next(&fAlgorithms);
- AliFMDMultAlgorithm* algorithm = 0;
- while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
- algorithm->PreEvent(clusterTree, fCurrentVertex);
+ if (fMult) fMult->Clear();
+ if (fESDObj) fESDObj->Clear();
+
+ 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<AliFMDMultAlgorithm*>(next())))
- algorithm->PostEvent();
- clusterTree->Fill();
+ 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
AliDebug(1, Form("Got %d digits", nDigits));
for (Int_t i = 0; i < nDigits; i++) {
AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
- AliFMDGeometry* fmd = AliFMDGeometry::Instance();
- AliFMDDetector* subDetector = fmd->GetDetector(digit->Detector());
- if (!subDetector) {
- Warning("ProcessDigits", "Unknown detector: FMD%d" , digit->Detector());
- continue;
- }
-
- AliFMDRing* ring = subDetector->GetRing(digit->Ring());
- Float_t ringZ = subDetector->GetRingZ(digit->Ring());
- if (!ring) {
- Warning("ProcessDigits", "Unknown ring: FMD%d%c", digit->Detector(),
- digit->Ring());
- break;
- }
+ 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);
- 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));
+ // Substract pedestal.
UShort_t counts = SubtractPedestal(digit);
- TIter next(&fAlgorithms);
- AliFMDMultAlgorithm* algorithm = 0;
- while ((algorithm = static_cast<AliFMDMultAlgorithm*>(next())))
- algorithm->ProcessDigit(digit, eta, phi, counts);
+ // 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);
}
}
-
+
//____________________________________________________________________
UShort_t
AliFMDReconstructor::SubtractPedestal(AliFMDDigit* digit) const
// 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;
+ 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 - ped), 0);
+ counts = TMath::Max(Int_t(counts - pedM), 0);
+ if (counts > 0) AliDebug(10, "Got a hit strip");
+
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.
+
+ // 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;
+}
+
+//____________________________________________________________________
+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)
+ AliDebug(10, Form("Translating energy %f to multiplicity via "
+ "divider %f->%f", edep, edepMIP, mult));
+ return mult;
+}
+
+//____________________________________________________________________
+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));
+}
+
+
+
//____________________________________________________________________
void
AliFMDReconstructor::FillESD(TTree* /* digitsTree */,
TTree* /* clusterTree */,
- AliESD* /* esd*/) const
+ 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);
+ }
+}
+
+//____________________________________________________________________
+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::Reconstruct(AliRunLoader*) 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"));
+ 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