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>
30 //____________________________________________________________________
40 /** @defgroup FMD_rec Reconstruction */
41 //____________________________________________________________________
42 /** @brief This is a class that reconstructs AliFMDRecPoint objects from of
44 This class reads either digits from a TClonesArray or raw data
45 from a DDL file (or similar), and applies calibrations to get
46 psuedo-inclusive multiplicities per strip.
50 class AliFMDReconstructor: public AliReconstructor
54 AliFMDReconstructor();
56 virtual ~AliFMDReconstructor();
58 /** Initialize the reconstructor. Here, we initialize the geometry
59 manager, and finds the local to global transformations from the
60 geometry. The calibration parameter manager is also
61 initialized (meaning that the calibration parameters is read
65 /** Flag that we can convert raw data into digits.
66 @return always @c true */
67 virtual Bool_t HasDigitConversion() const { return kTRUE; }
68 /** Convert raw data read from the AliRawReader @a reader into
69 digits. This is done using AliFMDRawReader and
70 AliFMDAltroReader. The digits are put in the passed TTree @a
72 @param reader Raw reader.
73 @param digitsTree Tree to store read digits in. */
74 virtual void ConvertDigits(AliRawReader* reader, TTree* digitsTree) const;
75 /** Reconstruct one event from the digits passed in @a digitsTree.
76 The member function creates AliFMDRecPoint objects and stores
77 them on the output tree @a clusterTree. An FMD ESD object is
79 @todo Make sure we get a vertex.
80 @param digitsTree Tree holding the digits of this event
81 @param clusterTree Tree to store AliFMDRecPoint objects in. */
82 virtual void Reconstruct(TTree* digitsTree, TTree* clusterTree) const;
84 virtual void Reconstruct(AliRawReader *, TTree*) 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,
93 AliESDEvent* esd) const;
94 /** Forwards to above member function */
95 virtual void FillESD(AliRawReader*, TTree* clusterTree,
96 AliESDEvent* esd) const;
98 virtual void SetESD(AliESDEvent* esd) { fESD = esd; }
99 /** Set the noise factor
100 @param f Factor to use */
101 virtual void SetNoiseFactor(Float_t f=3) { fNoiseFactor = f; }
102 /** Set whether we should do angle correction or nor
103 @param use If true, do angle correction */
104 virtual void SetAngleCorrect(Bool_t use=kTRUE) { fAngleCorrect = use; }
105 /** Set whether we want to do diagnostics. If this is enabled, a
106 file named @c FMD.Diag.root will be made. It contains a set of
107 histograms for each event, filed in separate directories in the
108 file. The histograms are
110 diagStep1 Read ADC vs. Noise surpressed ADC
111 diagStep2 Noise surpressed ADC vs. calculated Energy dep.
112 diagStep3 Energy deposition vs. angle corrected Energy dep.
113 diagStep4 Energy deposition vs. calculated multiplicity
114 diagAll Read ADC vs. calculated multiplicity
116 @param use If true, make the diagnostics file */
117 void SetDiagnose(Bool_t use=kTRUE) { fDiagnostics = use; }
120 @param other Object to copy from. */
121 AliFMDReconstructor(const AliFMDReconstructor& other);
122 /** Assignment operator
123 @param other Object to assign from
124 @return reference to this object */
125 AliFMDReconstructor& operator=(const AliFMDReconstructor& other);
126 /** Try to get the vertex from either ESD or generator header. Sets
127 @c fCurrentVertex to the found Z posistion of the vertex (if
128 found), and sets the flag @c fVertexType accordingly */
129 virtual void GetVertex() const;
130 /** Process AliFMDDigit objects in @a digits. For each digit, find
131 the psuedo-rapidity @f$ \eta@f$, azimuthal angle @f$ \varphi@f$,
132 energy deposited @f$ E@f$, and psuedo-inclusive multiplicity @f$
134 @param digits Array of digits. */
135 virtual void ProcessDigits(TClonesArray* digits) const;
136 /** Substract pedestals from raw ADC in @a digit
137 @param digit Digit data
138 @return Pedestal subtracted ADC count. */
139 virtual UShort_t SubtractPedestal(AliFMDDigit* digit) const;
140 /** Converts number of ADC counts to energy deposited. This is
145 where @f$ A_i@f$ is the pedestal subtracted ADC counts, and @f$
146 g_i@f$ is the gain for the @f$ i^{\mbox{th}}@f$ strip.
147 @param digit Raw data
148 @param eta Psuedo-rapidity of digit.
149 @param count Pedestal subtracted ADC counts
150 @return Energy deposited @f$ E_i@f$ */
151 virtual Float_t Adc2Energy(AliFMDDigit* digit, Float_t eta,
152 UShort_t count) const;
153 /** Converts an energy signal to number of particles. In this
154 implementation, it's done by
156 M_i = E_i / E_{\mbox{MIP}}
158 where @f$ E_i@f$ is the energy deposited, and @f$
159 E_{\mbox{MIP}}@f$ is the average energy deposited by a minimum
161 @param digit Raw data
162 @param edep Energy deposited @f$ E_i@f$
163 @return Psuedo-inclusive multiplicity @f$ M@f$ */
164 virtual Float_t Energy2Multiplicity(AliFMDDigit* digit, Float_t edep) const;
165 /** Calculate the physical coordinates psuedo-rapidity @f$ \eta@f$,
166 azimuthal angle @f$ \varphi@f$ of the strip corresponding to
167 the digit @a digit. This is done by using the information
168 obtained, and previously cached by AliFMDGeometry, from the
171 @param eta On return, psuedo-rapidity @f$ \eta@f$
172 @param phi On return, azimuthal angle @f$ \varphi@f$ */
173 virtual void PhysicalCoordinates(AliFMDDigit* digit, Float_t& eta,
177 kNoVertex, // Got no vertex
178 kGenVertex, // Got generator vertex
179 kESDVertex // Got ESD vertex
181 mutable TClonesArray* fMult; // Cache of RecPoints
182 mutable Int_t fNMult; // Number of entries in fMult
183 mutable TTree* fTreeR; // Output tree
184 mutable Float_t fCurrentVertex; // Z-coordinate of primary vertex
185 mutable AliESDFMD* fESDObj; // ESD output object
186 Float_t fNoiseFactor; // Factor of noise to check
187 Bool_t fAngleCorrect; // Whether to angle correct
188 mutable Vertex_t fVertexType; // What kind of vertex we got
189 AliESDEvent* fESD; // ESD object(?)
190 Bool_t fDiagnostics; // Wheter to do diagnostics
191 TH1* fDiagStep1; // Diagnostics histogram
192 TH1* fDiagStep2; // Diagnostics histogram
193 TH1* fDiagStep3; // Diagnostics histogram
194 TH1* fDiagStep4; // Diagnostics histogram
195 TH1* fDiagAll; // Diagnostics histogram
198 ClassDef(AliFMDReconstructor, 3) // class for the FMD reconstruction
201 //____________________________________________________________________