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; }
164 * Functions to use the FMD as an offline trigger. The idea is to read
165 * the data until we are certain we have one particle. If no particle is
166 * found the functions return kFALSE. These functions were added as a
167 * result of the discussions in the First Physics Working Group.
169 * @param AliESDFMD* fmd the FMD data from one event.
171 static Bool_t GetFMDAsideBit(AliESDFMD* fmd);
172 static Bool_t GetFMDCsideBit(AliESDFMD* fmd);
178 * @param other Object to copy from.
180 AliFMDReconstructor(const AliFMDReconstructor& other);
182 * Assignment operator
184 * @param other Object to assign from
186 * @return reference to this object
188 AliFMDReconstructor& operator=(const AliFMDReconstructor& other);
190 * Try to get the vertex from either ESD or generator header. Sets
191 * @c fCurrentVertex to the found Z posistion of the vertex (if
192 * found), and sets the flag @c fVertexType accordingly
194 * @param esd ESD structure to get Vz from
196 virtual void GetVertex(AliESDEvent* esd) const;
198 * Process AliFMDDigit objects in @a digits. For each digit, find
199 * the psuedo-rapidity @f$ \eta@f$, azimuthal angle @f$ \varphi@f$,
200 * energy deposited @f$ E@f$, and psuedo-inclusive multiplicity @f$
203 * @param digits Array of digits.
205 virtual void ProcessDigits(TClonesArray* digits) const;
207 * Process a single digit
209 * @param digit Digiti to process
211 virtual void ProcessDigit(AliFMDDigit* digit) const;
213 * Process the signal from a single strip.
215 * @param det Detector number
216 * @param rng Ring identifier
217 * @param sec Sector number
218 * @param str Strip number
219 * @param adc Number of ADC counts for this strip
221 virtual void ProcessSignal(UShort_t det,
227 * Process the signal from a single strip.
229 * @param sdigits Array to fill
230 * @param det Detector number
231 * @param rng Ring identifier
232 * @param sec Sector number
233 * @param str Strip number
234 * @param sam Sample number
235 * @param adc Number of ADC counts for this strip
237 virtual void DigitizeSignal(TClonesArray* sdigits,
245 * Subtract the pedestal off the ADC counts.
247 * @param det Detector number
248 * @param rng Ring identifier
249 * @param sec Sector number
250 * @param str Strip number
251 * @param adc ADC counts
252 * @param noiseFactor If pedestal substracted pedestal is less then
253 * this times the noise, then consider this to be 0.
254 * @param zsEnabled Whether zero-suppression is on.
255 * @param zsNoiseFactor Noise factor used in on-line pedestal
258 * @return The pedestal subtracted ADC counts (possibly 0), or @c
259 * USHRT_MAX in case of problems.
261 virtual UShort_t SubtractPedestal(UShort_t det,
268 UShort_t zsNoiseFactor) const;
270 * Substract pedestals from raw ADC in @a digit
272 * @param det Detector number
273 * @param rng Ring identifier
274 * @param sec Sector number
275 * @param str Strip number
276 * @param adc Number of ADC counts
278 * @return Pedestal subtracted ADC count.
280 virtual UShort_t SubtractPedestal(UShort_t det,
286 * Converts number of ADC counts to energy deposited. This is
291 * where @f$ A_i@f$ is the pedestal subtracted ADC counts, and @f$
292 * g_i@f$ is the gain for the @f$ i^{\mbox{th}}@f$ strip.
294 * @param det Detector number
295 * @param rng Ring identifier
296 * @param sec Sector number
297 * @param str Strip number
298 * @param eta Psuedo-rapidity of digit.
299 * @param count Pedestal subtracted ADC counts
301 * @return Energy deposited @f$ E_i@f$
303 virtual Float_t Adc2Energy(UShort_t det,
307 UShort_t count) const;
309 * Converts number of ADC counts to energy deposited. This is
314 * where @f$ A_i@f$ is the pedestal subtracted ADC counts, and @f$
315 * g_i@f$ is the gain for the @f$ i^{\mbox{th}}@f$ strip.
317 * @param det Detector number
318 * @param rng Ring identifier
319 * @param sec Sector number
320 * @param str Strip number
321 * @param eta Psuedo-rapidity of digit.
322 * @param count Pedestal subtracted ADC counts
324 * @return Energy deposited @f$ E_i@f$
326 virtual Float_t Adc2Energy(UShort_t det,
331 UShort_t count) const;
333 * Converts an energy signal to number of particles. In this
334 * implementation, it's done by
336 * M_i = E_i / E_{\mbox{MIP}}
338 * where @f$ E_i@f$ is the energy deposited, and
339 * @f$ E_{\mbox{MIP}}@f$ is the average energy deposited by a
340 * minimum ionizing particle
342 * @param det Detector number
343 * @param rng Ring identifier
344 * @param sec Sector number
345 * @param str Strip number
346 * @param eta On return, psuedo-rapidity @f$ \eta@f$
347 * @param phi On return, azimuthal angle @f$ \varphi@f$
348 * @param edep Energy deposited @f$ E_i@f$
350 * @return Psuedo-inclusive multiplicity @f$ M@f$
352 virtual Float_t Energy2Multiplicity(UShort_t det,
358 * Calculate the physical coordinates psuedo-rapidity @f$ \eta@f$,
359 * azimuthal angle @f$ \varphi@f$ of the strip corresponding to
360 * the digit @a digit. This is done by using the information
361 * obtained, and previously cached by AliFMDGeometry, from the
364 * @param det Detector number
365 * @param rng Ring identifier
366 * @param sec Sector number
367 * @param str Strip number
368 * @param eta On return, psuedo-rapidity @f$ \eta@f$
369 * @param phi On return, azimuthal angle @f$ \varphi@f$
371 virtual void PhysicalCoordinates(UShort_t det,
378 * Set-up reconstructor to use values from reconstruction
379 * parameters, if present, for this event. If the argument @a set
380 * is @c false, then restore preset values.
384 virtual void UseRecoParam(Bool_t set=kTRUE) const;
386 * Utility member function to get the reconstruction parameters for
389 * @return Pointer to AliFMDRecoParam object or null if not
392 const AliFMDRecoParam* GetParameters() const;
394 * Get the numeric identifier of this detector
396 * @return Should be 12
398 Int_t GetIdentifier() const;
400 kNoVertex, // Got no vertex
401 kGenVertex, // Got generator vertex
402 kESDVertex // Got ESD vertex
404 mutable TClonesArray* fMult; // Cache of RecPoints
405 mutable Int_t fNMult; // Number of entries in fMult
406 mutable TTree* fTreeR; // Output tree
407 mutable Float_t fCurrentVertex; // Z-coordinate of primary vertex
408 mutable AliESDFMD* fESDObj; // ESD output object
409 mutable Float_t fNoiseFactor; // Factor of noise to check
410 mutable Bool_t fAngleCorrect; // Whether to angle correct
411 mutable Vertex_t fVertexType; // What kind of vertex we got
412 AliESDEvent* fESD; // ESD object(?)
413 Bool_t fDiagnostics; // Wheter to do diagnostics
414 TH1* fDiagStep1; // Diagnostics histogram
415 TH1* fDiagStep2; // Diagnostics histogram
416 TH1* fDiagStep3; // Diagnostics histogram
417 TH1* fDiagStep4; // Diagnostics histogram
418 TH1* fDiagAll; // Diagnostics histogram
419 mutable Bool_t fZS[3]; // Zero-suppredded?
420 mutable UShort_t fZSFactor[3]; // Noise factor for Zero-suppression
423 ClassDef(AliFMDReconstructor, 3) // class for the FMD reconstruction
426 //____________________________________________________________________