//
//-- Authors: Evgeny Karpechev (INR) and Alla Maevskaia (INR)
// Latest changes by Christian Holm Christensen <cholm@nbi.dk>
-/*
- Reconstruct nember of particles in given group of pads for given
- FMDvolume determine by numberOfVolume ,
- numberOfMinSector,numberOfMaxSector, numberOfMinRing,
- numberOfMaxRing Reconstruction method choose dependence on number
- of empty pads
- */
/* $Id$ */
//____________________________________________________________________
-//
-// Class to do reconstruction of events based on the FMD data. The
-// class will do two kinds of reconstruction, one based on energy
-// deposition, and one using hit patterns.
-//
-
// Header guards in the header files speeds up the compilation
// considerably. Please leave them in.
#ifndef ALIRECONSTRUCTOR_H
class AliESD;
class AliESDFMD;
+/** @defgroup FMD_rec Reconstruction */
//____________________________________________________________________
+/** This is a class that reconstructs AliFMDRecPoint objects from of
+ Digits. This class reads either digits from a TClonesArray or raw
+ data from a DDL file (or similar), and applies calibrations to get
+ psuedo-inclusive multiplicities per strip.
+ @ingroup FMD_rec
+ */
class AliFMDReconstructor: public AliReconstructor
{
public:
+ /** CTOR */
AliFMDReconstructor();
+ /** Copy CTOR
+ @param other Object to copy from. */
AliFMDReconstructor(const AliFMDReconstructor& other);
+ /** DTOR */
virtual ~AliFMDReconstructor();
+ /** Assignment operator
+ @param other Object to assign from
+ @return reference to this object */
AliFMDReconstructor& operator=(const AliFMDReconstructor& other);
+ /** Initialize the reconstructor. Here, we initialize the geometry
+ manager, and finds the local to global transformations from the
+ geometry. The calibration parameter manager is also
+ initialized (meaning that the calibration parameters is read
+ from CDB). Next, we try to get some information about the run
+ from the run loader passed.
+ @param runLoader Run loader to use to load and store data.
+ */
virtual void Init(AliRunLoader* runLoader);
+ /** Flag that we can convert raw data into digits.
+ @return always @c true */
virtual Bool_t HasDigitConversion() const { return kTRUE; }
+ /** Convert raw data read from the AliRawReader @a reader into
+ digits. This is done using AliFMDRawReader and
+ AliFMDAltroReader. The digits are put in the passed TTree @a
+ digitsTree.
+ @param reader Raw reader.
+ @param digitsTree Tree to store read digits in. */
virtual void ConvertDigits(AliRawReader* reader, TTree* digitsTree) const;
+ /** Flag that we can do one-event reconstruction.
+ @return always @c true */
virtual Bool_t HasLocalReconstruction() const { return kTRUE; }
+ /** Reconstruct one event from the digits passed in @a digitsTree.
+ The member function creates AliFMDRecPoint objects and stores
+ them on the output tree @a clusterTree. An FMD ESD object is
+ created in parallel.
+ @todo Make sure we get a vertex.
+ @param digitsTree Tree holding the digits of this event
+ @param clusterTree Tree to store AliFMDRecPoint objects in. */
virtual void Reconstruct(TTree* digitsTree, TTree* clusterTree) const;
+ /** Put in the ESD data, the FMD ESD data. The object created by
+ the Reconstruct member function is copied to the ESD object.
+ @param digitsTree Tree of digits for this event - not used
+ @param clusterTree Tree of reconstructed points for this event
+ - not used.
+ @param esd ESD object to store data in.
+ */
virtual void FillESD(TTree* digitsTree, TTree* clusterTree,
AliESD* esd) const;
+ /** Not used */
virtual void SetESD(AliESD* esd) { fESD = esd; }
private:
+ /** Hide base classes unused function */
void Reconstruct(AliRawReader*, TTree*) const;
+ /** Hide base classes unused function */
void Reconstruct(AliRunLoader*) const;
+ /** Hide base classes unused function */
void Reconstruct(AliRunLoader*, AliRawReader*) const;
+ /** Hide base classes unused function */
void FillESD(AliRawReader*, TTree*, AliESD*) const;
+ /** Hide base classes unused function */
void FillESD(AliRunLoader*, AliESD*) const;
+ /** Hide base classes unused function */
void FillESD(AliRunLoader*, AliRawReader*, AliESD*) const;
protected:
+ /** Process AliFMDDigit objects in @a digits. For each digit, find
+ the psuedo-rapidity @f$ \eta@f$, azimuthal angle @f$ \varphi@f$,
+ energy deposited @f$ E@f$, and psuedo-inclusive multiplicity @f$
+ M@f$.
+ @param digits Array of digits. */
virtual void ProcessDigits(TClonesArray* digits) const;
+ /** Substract pedestals from raw ADC in @a digit
+ @param digit Digit data
+ @return Pedestal subtracted ADC count. */
virtual UShort_t SubtractPedestal(AliFMDDigit* digit) const;
+ /** Converts number of ADC counts to energy deposited. This is
+ done by
+ @f[
+ E_i = A_i g_i
+ @f]
+ where @f$ A_i@f$ is the pedestal subtracted ADC counts, and @f$
+ g_i@f$ is the gain for the @f$ i^{\mbox{th}}@f$ strip.
+ @param digit Raw data
+ @param eta Psuedo-rapidity of digit.
+ @param count Pedestal subtracted ADC counts
+ @return Energy deposited @f$ E_i@f$ */
virtual Float_t Adc2Energy(AliFMDDigit* digit, Float_t eta,
UShort_t count) const;
+ /** Converts an energy signal to number of particles. In this
+ implementation, it's done by
+ @f[
+ M_i = E_i / E_{\mbox{MIP}}
+ @f]
+ where @f$ E_i@f$ is the energy deposited, and @f$
+ E_{\mbox{MIP}}@f$ is the average energy deposited by a minimum
+ ionizing particle
+ @param digit Raw data
+ @param edep Energy deposited @f$ E_i@f$
+ @return Psuedo-inclusive multiplicity @f$ M@f$ */
virtual Float_t Energy2Multiplicity(AliFMDDigit* digit, Float_t edep) const;
+ /** Calculate the physical coordinates psuedo-rapidity @f$ \eta@f$,
+ azimuthal angle @f$ \varphi@f$ of the strip corresponding to
+ the digit @a digit. This is done by using the information
+ obtained, and previously cached by AliFMDGeometry, from the
+ TGeoManager.
+ @param digit Digit.
+ @param eta On return, psuedo-rapidity @f$ \eta@f$
+ @param phi On return, azimuthal angle @f$ \varphi@f$ */
virtual void PhysicalCoordinates(AliFMDDigit* digit, Float_t& eta,
Float_t& phi) const;
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff