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>
29 //____________________________________________________________________
36 class AliFMDRecoParam;
40 /** @defgroup FMD_rec Reconstruction */
41 //____________________________________________________________________
43 * @brief This is a class that reconstructs AliFMDRecPoint objects
46 * This class reads either digits from a TClonesArray or raw data
47 * from a DDL file (or similar), and applies calibrations to get
48 * psuedo-inclusive multiplicities per strip.
52 class AliFMDReconstructor: public AliReconstructor
58 AliFMDReconstructor();
62 virtual ~AliFMDReconstructor();
65 * Initialize the reconstructor. Here, we initialize the geometry
66 * manager, and finds the local to global transformations from the
67 * geometry. The calibration parameter manager is also
68 * initialized (meaning that the calibration parameters is read
73 * Flag that we can convert raw data into digits.
75 * @return always @c true
77 virtual Bool_t HasDigitConversion() const { return kTRUE; }
79 * Convert raw data read from the AliRawReader @a reader into
80 * digits. This is done using AliFMDRawReader and
81 * AliFMDAltroReader. The digits are put in the passed TTree @a
84 * @param reader Raw reader.
85 * @param digitsTree Tree to store read digits in.
87 virtual void ConvertDigits(AliRawReader* reader, TTree* digitsTree) const;
89 * Reconstruct one event from the digits passed in @a digitsTree.
90 * The member function creates AliFMDRecPoint objects and stores
91 * them on the output tree @a clusterTree. An FMD ESD object is
92 * created in parallel.
94 * @param digitsTree Tree holding the digits of this event
95 * @param clusterTree Tree to store AliFMDRecPoint objects in.
97 virtual void Reconstruct(TTree* digitsTree, TTree* clusterTree) const;
100 * @todo Implement this, such that we'll reconstruct directly from
101 * the read ADC values rather than going via an intermedant
102 * TClonesArray of AliFMDDigits
104 virtual void Reconstruct(AliRawReader *, TTree*) const;
106 * Put in the ESD data, the FMD ESD data. The object created by
107 * the Reconstruct member function is copied to the ESD object.
109 * @param digitsTree Tree of digits for this event - not used
110 * @param clusterTree Tree of reconstructed points for this event -
112 * @param esd ESD object to store data in.
114 virtual void FillESD(TTree* digitsTree, TTree* clusterTree,
115 AliESDEvent* esd) const;
117 * Forwards to above member function
119 virtual void FillESD(AliRawReader*, TTree* clusterTree,
120 AliESDEvent* esd) const;
123 * Create SDigits from raw data
125 * @param reader The raw reader
126 * @param sdigits Array to fill with AliFMDSDigit objects.
128 virtual void Digitize(AliRawReader* reader,
129 TClonesArray* sdigits) const;
134 virtual void SetESD(AliESDEvent* esd) { fESD = esd; }
136 * Set the noise factor
138 * @param f Factor to use
140 virtual void SetNoiseFactor(Float_t f=3) { fNoiseFactor = f; }
142 * Set whether we should do angle correction or nor
144 * @param use If true, do angle correction
146 virtual void SetAngleCorrect(Bool_t use=kTRUE) { fAngleCorrect = use; }
148 * Set whether we want to do diagnostics. If this is enabled, a
149 * file named @c FMD.Diag.root will be made. It contains a set of
150 * histograms for each event, filed in separate directories in the
151 * file. The histograms are
153 * diagStep1 Read ADC vs. Noise surpressed ADC
154 * diagStep2 Noise surpressed ADC vs. calculated Energy dep.
155 * diagStep3 Energy deposition vs. angle corrected Energy dep.
156 * diagStep4 Energy deposition vs. calculated multiplicity
157 * diagAll Read ADC vs. calculated multiplicity
160 * @param use If true, make the diagnostics file
162 void SetDiagnose(Bool_t use=kTRUE) { fDiagnostics = use; }
167 * @param other Object to copy from.
169 AliFMDReconstructor(const AliFMDReconstructor& other);
171 * Assignment operator
173 * @param other Object to assign from
175 * @return reference to this object
177 AliFMDReconstructor& operator=(const AliFMDReconstructor& other);
179 * Try to get the vertex from either ESD or generator header. Sets
180 * @c fCurrentVertex to the found Z posistion of the vertex (if
181 * found), and sets the flag @c fVertexType accordingly
183 * @param esd ESD structure to get Vz from
185 virtual void GetVertex(AliESDEvent* esd) const;
187 * Process AliFMDDigit objects in @a digits. For each digit, find
188 * the psuedo-rapidity @f$ \eta@f$, azimuthal angle @f$ \varphi@f$,
189 * energy deposited @f$ E@f$, and psuedo-inclusive multiplicity @f$
192 * @param digits Array of digits.
194 virtual void ProcessDigits(TClonesArray* digits) const;
196 * Process a single digit
198 * @param digit Digiti to process
200 virtual void ProcessDigit(AliFMDDigit* digit) const;
202 * Process the signal from a single strip.
204 * @param det Detector number
205 * @param rng Ring identifier
206 * @param sec Sector number
207 * @param str Strip number
208 * @param adc Number of ADC counts for this strip
210 virtual void ProcessSignal(UShort_t det,
216 * Process the signal from a single strip.
218 * @param sdigits Array to fill
219 * @param det Detector number
220 * @param rng Ring identifier
221 * @param sec Sector number
222 * @param str Strip number
223 * @param sam Sample number
224 * @param adc Number of ADC counts for this strip
226 virtual void DigitizeSignal(TClonesArray* sdigits,
234 * Subtract the pedestal off the ADC counts.
236 * @param det Detector number
237 * @param rng Ring identifier
238 * @param sec Sector number
239 * @param str Strip number
240 * @param adc ADC counts
241 * @param noiseFactor If pedestal substracted pedestal is less then
242 * this times the noise, then consider this to be 0.
243 * @param zsEnabled Whether zero-suppression is on.
244 * @param zsNoiseFactor Noise factor used in on-line pedestal
247 * @return The pedestal subtracted ADC counts (possibly 0), or @c
248 * USHRT_MAX in case of problems.
250 virtual UShort_t SubtractPedestal(UShort_t det,
257 UShort_t zsNoiseFactor) const;
259 * Substract pedestals from raw ADC in @a digit
261 * @param det Detector number
262 * @param rng Ring identifier
263 * @param sec Sector number
264 * @param str Strip number
265 * @param adc Number of ADC counts
267 * @return Pedestal subtracted ADC count.
269 virtual UShort_t SubtractPedestal(UShort_t det,
275 * Converts number of ADC counts to energy deposited. This is
280 * where @f$ A_i@f$ is the pedestal subtracted ADC counts, and @f$
281 * g_i@f$ is the gain for the @f$ i^{\mbox{th}}@f$ strip.
283 * @param det Detector number
284 * @param rng Ring identifier
285 * @param sec Sector number
286 * @param str Strip number
287 * @param eta Psuedo-rapidity of digit.
288 * @param count Pedestal subtracted ADC counts
290 * @return Energy deposited @f$ E_i@f$
292 virtual Float_t Adc2Energy(UShort_t det,
296 UShort_t count) const;
298 * Converts number of ADC counts to energy deposited. This is
303 * where @f$ A_i@f$ is the pedestal subtracted ADC counts, and @f$
304 * g_i@f$ is the gain for the @f$ i^{\mbox{th}}@f$ strip.
306 * @param det Detector number
307 * @param rng Ring identifier
308 * @param sec Sector number
309 * @param str Strip number
310 * @param eta Psuedo-rapidity of digit.
311 * @param count Pedestal subtracted ADC counts
313 * @return Energy deposited @f$ E_i@f$
315 virtual Float_t Adc2Energy(UShort_t det,
320 UShort_t count) const;
322 * Converts an energy signal to number of particles. In this
323 * implementation, it's done by
325 * M_i = E_i / E_{\mbox{MIP}}
327 * where @f$ E_i@f$ is the energy deposited, and
328 * @f$ E_{\mbox{MIP}}@f$ is the average energy deposited by a
329 * minimum ionizing particle
331 * @param det Detector number
332 * @param rng Ring identifier
333 * @param sec Sector number
334 * @param str Strip number
335 * @param eta On return, psuedo-rapidity @f$ \eta@f$
336 * @param phi On return, azimuthal angle @f$ \varphi@f$
337 * @param edep Energy deposited @f$ E_i@f$
339 * @return Psuedo-inclusive multiplicity @f$ M@f$
341 virtual Float_t Energy2Multiplicity(UShort_t det,
347 * Calculate the physical coordinates psuedo-rapidity @f$ \eta@f$,
348 * azimuthal angle @f$ \varphi@f$ of the strip corresponding to
349 * the digit @a digit. This is done by using the information
350 * obtained, and previously cached by AliFMDGeometry, from the
353 * @param det Detector number
354 * @param rng Ring identifier
355 * @param sec Sector number
356 * @param str Strip number
357 * @param eta On return, psuedo-rapidity @f$ \eta@f$
358 * @param phi On return, azimuthal angle @f$ \varphi@f$
360 virtual void PhysicalCoordinates(UShort_t det,
367 * Set-up reconstructor to use values from reconstruction
368 * parameters, if present, for this event. If the argument @a set
369 * is @c false, then restore preset values.
373 virtual void UseRecoParam(Bool_t set=kTRUE) const;
375 * Utility member function to get the reconstruction parameters for
378 * @return Pointer to AliFMDRecoParam object or null if not
381 const AliFMDRecoParam* GetParameters() const;
383 * Get the numeric identifier of this detector
385 * @return Should be 12
387 Int_t GetIdentifier() const;
389 kNoVertex, // Got no vertex
390 kGenVertex, // Got generator vertex
391 kESDVertex // Got ESD vertex
393 mutable TClonesArray* fMult; // Cache of RecPoints
394 mutable Int_t fNMult; // Number of entries in fMult
395 mutable TTree* fTreeR; // Output tree
396 mutable Float_t fCurrentVertex; // Z-coordinate of primary vertex
397 mutable AliESDFMD* fESDObj; // ESD output object
398 mutable Float_t fNoiseFactor; // Factor of noise to check
399 mutable Bool_t fAngleCorrect; // Whether to angle correct
400 mutable Vertex_t fVertexType; // What kind of vertex we got
401 AliESDEvent* fESD; // ESD object(?)
402 Bool_t fDiagnostics; // Wheter to do diagnostics
403 TH1* fDiagStep1; // Diagnostics histogram
404 TH1* fDiagStep2; // Diagnostics histogram
405 TH1* fDiagStep3; // Diagnostics histogram
406 TH1* fDiagStep4; // Diagnostics histogram
407 TH1* fDiagAll; // Diagnostics histogram
408 mutable Bool_t fZS[3]; // Zero-suppredded?
409 mutable UShort_t fZSFactor[3]; // Noise factor for Zero-suppression
412 ClassDef(AliFMDReconstructor, 3) // class for the FMD reconstruction
415 //____________________________________________________________________