1 #ifndef ALIFMDRECONSTRUCTOR_H
2 #define ALIFMDRECONSTRUCTOR_H
4 // Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights
7 // See cxx source for full Copyright notice
9 // AliFMDReconstructor.h
10 // Task Class for making TreeR for FMD
12 //-- Authors: Evgeny Karpechev (INR) and Alla Maevskaia (INR)
13 // Latest changes by Christian Holm Christensen <cholm@nbi.dk>
15 /** @file AliFMDReconstructor.h
16 @author Christian Holm Christensen <cholm@nbi.dk>
17 @date Mon Mar 27 12:47:09 2006
18 @brief FMD reconstruction
21 //____________________________________________________________________
22 // Header guards in the header files speeds up the compilation
23 // considerably. Please leave them in.
24 #ifndef ALIRECONSTRUCTOR_H
25 # include <AliReconstructor.h>
28 //____________________________________________________________________
37 /** @defgroup FMD_rec Reconstruction */
38 //____________________________________________________________________
39 /** @brief This is a class that reconstructs AliFMDRecPoint objects from of
41 This class reads either digits from a TClonesArray or raw data
42 from a DDL file (or similar), and applies calibrations to get
43 psuedo-inclusive multiplicities per strip.
47 class AliFMDReconstructor: public AliReconstructor
51 AliFMDReconstructor();
53 virtual ~AliFMDReconstructor();
55 /** Initialize the reconstructor. Here, we initialize the geometry
56 manager, and finds the local to global transformations from the
57 geometry. The calibration parameter manager is also
58 initialized (meaning that the calibration parameters is read
59 from CDB). Next, we try to get some information about the run
60 from the run loader passed.
61 @param runLoader Run loader to use to load and store data.
63 virtual void Init(AliRunLoader* runLoader);
64 /** Flag that we can convert raw data into digits.
65 @return always @c true */
66 virtual Bool_t HasDigitConversion() const { return kTRUE; }
67 /** Convert raw data read from the AliRawReader @a reader into
68 digits. This is done using AliFMDRawReader and
69 AliFMDAltroReader. The digits are put in the passed TTree @a
71 @param reader Raw reader.
72 @param digitsTree Tree to store read digits in. */
73 virtual void ConvertDigits(AliRawReader* reader, TTree* digitsTree) const;
74 /** Flag that we can do one-event reconstruction.
75 @return always @c true */
76 virtual Bool_t HasLocalReconstruction() const { return kTRUE; }
77 /** Reconstruct one event from the digits passed in @a digitsTree.
78 The member function creates AliFMDRecPoint objects and stores
79 them on the output tree @a clusterTree. An FMD ESD object is
81 @todo Make sure we get a vertex.
82 @param digitsTree Tree holding the digits of this event
83 @param clusterTree Tree to store AliFMDRecPoint objects in. */
84 virtual void Reconstruct(TTree* digitsTree, TTree* clusterTree) const;
85 /** Put in the ESD data, the FMD ESD data. The object created by
86 the Reconstruct member function is copied to the ESD object.
87 @param digitsTree Tree of digits for this event - not used
88 @param clusterTree Tree of reconstructed points for this event
90 @param esd ESD object to store data in.
92 virtual void FillESD(TTree* digitsTree, TTree* clusterTree,
95 virtual void SetESD(AliESD* esd) { fESD = esd; }
96 /** Set the noise factor
97 @param f Factor to use */
98 virtual void SetNoiseFactor(Float_t f=3) { fNoiseFactor = f; }
99 /** Set whether we should do angle correction or nor
100 @param use If true, do angle correction */
101 virtual void SetAngleCorrect(Bool_t use=kTRUE) { fAngleCorrect = use; }
104 @param other Object to copy from. */
105 AliFMDReconstructor(const AliFMDReconstructor& other);
106 /** Assignment operator
107 @param other Object to assign from
108 @return reference to this object */
109 AliFMDReconstructor& operator=(const AliFMDReconstructor& other);
110 /** Process AliFMDDigit objects in @a digits. For each digit, find
111 the psuedo-rapidity @f$ \eta@f$, azimuthal angle @f$ \varphi@f$,
112 energy deposited @f$ E@f$, and psuedo-inclusive multiplicity @f$
114 @param digits Array of digits. */
115 virtual void ProcessDigits(TClonesArray* digits) const;
116 /** Substract pedestals from raw ADC in @a digit
117 @param digit Digit data
118 @return Pedestal subtracted ADC count. */
119 virtual UShort_t SubtractPedestal(AliFMDDigit* digit) const;
120 /** Converts number of ADC counts to energy deposited. This is
125 where @f$ A_i@f$ is the pedestal subtracted ADC counts, and @f$
126 g_i@f$ is the gain for the @f$ i^{\mbox{th}}@f$ strip.
127 @param digit Raw data
128 @param eta Psuedo-rapidity of digit.
129 @param count Pedestal subtracted ADC counts
130 @return Energy deposited @f$ E_i@f$ */
131 virtual Float_t Adc2Energy(AliFMDDigit* digit, Float_t eta,
132 UShort_t count) const;
133 /** Converts an energy signal to number of particles. In this
134 implementation, it's done by
136 M_i = E_i / E_{\mbox{MIP}}
138 where @f$ E_i@f$ is the energy deposited, and @f$
139 E_{\mbox{MIP}}@f$ is the average energy deposited by a minimum
141 @param digit Raw data
142 @param edep Energy deposited @f$ E_i@f$
143 @return Psuedo-inclusive multiplicity @f$ M@f$ */
144 virtual Float_t Energy2Multiplicity(AliFMDDigit* digit, Float_t edep) const;
145 /** Calculate the physical coordinates psuedo-rapidity @f$ \eta@f$,
146 azimuthal angle @f$ \varphi@f$ of the strip corresponding to
147 the digit @a digit. This is done by using the information
148 obtained, and previously cached by AliFMDGeometry, from the
151 @param eta On return, psuedo-rapidity @f$ \eta@f$
152 @param phi On return, azimuthal angle @f$ \varphi@f$ */
153 virtual void PhysicalCoordinates(AliFMDDigit* digit, Float_t& eta,
156 mutable TClonesArray* fMult; // Cache of RecPoints
157 mutable Int_t fNMult; // Number of entries in fMult
158 mutable TTree* fTreeR; // Output tree
159 mutable Float_t fCurrentVertex; // Z-coordinate of primary vertex
160 mutable AliESDFMD* fESDObj; // ESD output object
161 mutable Float_t fNoiseFactor; // Factor of noise to check
162 mutable Bool_t fAngleCorrect; // Whether to angle correct
163 AliESD* fESD; // ESD object(?)
166 /** Hide base classes unused function */
167 void Reconstruct(AliRawReader*, TTree*) const;
168 /** Hide base classes unused function */
169 void Reconstruct(AliRunLoader*) const;
170 /** Hide base classes unused function */
171 void Reconstruct(AliRunLoader*, AliRawReader*) const;
172 /** Hide base classes unused function */
173 void FillESD(AliRawReader*, TTree*, AliESD*) const;
174 /** Hide base classes unused function */
175 void FillESD(AliRunLoader*, AliESD*) const;
176 /** Hide base classes unused function */
177 void FillESD(AliRunLoader*, AliRawReader*, AliESD*) const;
179 ClassDef(AliFMDReconstructor, 0) // class for the FMD reconstruction
182 //____________________________________________________________________