1 #ifndef ALITPCPIDRESPONSE_H
2 #define ALITPCPIDRESPONSE_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
6 //-------------------------------------------------------
8 // A very naive design... Should be made better by the detector experts...
9 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
10 // With many additions and modifications suggested by
11 // Alexander Kalweit, GSI, alexander.philipp.kalweit@cern.ch
12 // Dariusz Miskowiec, GSI, D.Miskowiec@gsi.de
13 // ...and some modifications by
14 // Mikolaj Krzewicki, GSI, mikolaj.krzewicki@cern.ch
15 // ...and some modifications plus eta correction functions by
16 // Benjamin Hess, University of Tuebingen, bhess@cern.ch
17 //-------------------------------------------------------
22 #include <TObjArray.h>
25 #include "AliVTrack.h"
30 class AliTPCPIDResponse: public TNamed {
33 //TODO Remove? AliTPCPIDResponse(const Double_t *param);
34 AliTPCPIDResponse(const AliTPCPIDResponse&);
35 AliTPCPIDResponse& operator=(const AliTPCPIDResponse&);
36 virtual ~AliTPCPIDResponse();
45 enum ETPCgainScenario {
49 kGainScenarioInvalid = 3
52 static const Int_t fgkNumberOfParticleSpecies=AliPID::kSPECIESC;
53 static const Int_t fgkNumberOfGainScenarios=3;
54 static const Int_t fgkNumberOfdEdxSourceScenarios=3;
57 kdEdxDefault=0, // use combined dEdx from IROC+OROC (assumes ideal detector)
58 kdEdxOROC=1, // use only OROC
59 kdEdxHybrid=2, // Use IROC+OROC dEdx only where IROCS are good (high gain), otherwise fall back to OROC only
60 kdEdxInvalid=3 //invalid
63 void SetSigma(Float_t res0, Float_t resN2);
64 void SetBetheBlochParameters(Double_t kp1,
70 //Better prevent user from setting fMIP != 50. because fMIP set fix to 50 for much other code:
71 void SetMip(Float_t mip) { fMIP = mip; } // Set overall normalisation; mean dE/dx for MIP
72 Double_t Bethe(Double_t bg) const;
73 void SetUseDatabase(Bool_t useDatabase) { fUseDatabase = useDatabase;}
74 Bool_t GetUseDatabase() const { return fUseDatabase;}
76 void SetResponseFunction(AliPID::EParticleType type, TObject * const o) { fResponseFunctions.AddAt(o,(Int_t)type); }
77 const TObject * GetResponseFunction(AliPID::EParticleType type) { return fResponseFunctions.At((Int_t)type); }
78 void SetVoltage(Int_t n, Float_t v) {fVoltageMap[n]=v;}
79 void SetVoltageMap(const TVectorF& a) {fVoltageMap=a;} //resets ownership, ~ will not delete contents
80 Float_t GetVoltage(Int_t n) const {return fVoltageMap[n];}
81 void SetLowGainIROCthreshold(Float_t v) {fLowGainIROCthreshold=v;}
82 void SetBadIROCthreshold(Float_t v) {fBadIROCthreshhold=v;}
83 void SetLowGainOROCthreshold(Float_t v) {fLowGainOROCthreshold=v;}
84 void SetBadOROCthreshold(Float_t v) {fBadOROCthreshhold=v;}
85 void SetMaxBadLengthFraction(Float_t f) {fMaxBadLengthFraction=f;}
87 void SetMagField(Double_t mf) { fMagField=mf; }
89 const TH2D* GetEtaCorrMap() const { return fhEtaCorr; };
90 Bool_t SetEtaCorrMap(TH2D* hMap);
92 Double_t GetEtaCorrection(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
94 Double_t GetEtaCorrectedTrackdEdx(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
96 const TH2D* GetSigmaPar1Map() const { return fhEtaSigmaPar1; };
97 Double_t GetSigmaPar0() const { return fSigmaPar0; };
98 Bool_t SetSigmaParams(TH2D* hSigmaPar1Map, Double_t sigmaPar0);
100 Double_t GetSigmaPar1(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
103 void SetSigma(Float_t res0, Float_t resN2, ETPCgainScenario gainScenario );
104 Double_t GetExpectedSignal( const AliVTrack* track,
105 AliPID::EParticleType species,
106 ETPCdEdxSource dedxSource = kdEdxDefault,
107 Bool_t correctEta = kFALSE) const;//TODO: In future, default kTRUE
108 Double_t GetExpectedSigma( const AliVTrack* track,
109 AliPID::EParticleType species,
110 ETPCdEdxSource dedxSource = kdEdxDefault,
111 Bool_t correctEta = kFALSE) const;//TODO: In future, default kTRUE
112 Float_t GetNumberOfSigmas( const AliVTrack* track,
113 AliPID::EParticleType species,
114 ETPCdEdxSource dedxSource = kdEdxDefault,
115 Bool_t correctEta = kFALSE) const;//TODO: In future, default kTRUE
117 void SetResponseFunction(TObject* o,
118 AliPID::EParticleType type,
119 ETPCgainScenario gainScenario);
120 void Print(Option_t* option="") const;
121 TSpline3* GetResponseFunction( AliPID::EParticleType species,
122 ETPCgainScenario gainScenario ) const;
123 TSpline3* GetResponseFunction( const AliVTrack* track,
124 AliPID::EParticleType species,
125 ETPCdEdxSource dedxSource = kdEdxDefault) const;
126 Bool_t ResponseFunctiondEdxN(const AliVTrack* track,
127 AliPID::EParticleType species,
128 ETPCdEdxSource dedxSource,
129 Double_t& dEdx, Int_t& nPoints, ETPCgainScenario& gainScenario, TSpline3** responseFunction) const;
130 Bool_t sectorNumbersInOut(Double_t* trackPositionInner,
131 Double_t* trackPositionOuter,
132 Float_t& phiIn, Float_t& phiOut,
133 Int_t& in, Int_t& out ) const;
134 AliTPCPIDResponse::EChamberStatus TrackStatus(const AliVTrack* track, Int_t layer) const;
135 Float_t MaxClusterRadius(const AliVTrack* track) const;
136 Bool_t TrackApex(const AliVTrack* track, Float_t magField, Double_t position[3]) const;
137 static const char* GainScenarioName(Int_t n) {return fgkGainScenarioName[(n>fgkNumberOfdEdxSourceScenarios)?fgkNumberOfdEdxSourceScenarios+1:n];}
138 Int_t ResponseFunctionIndex( AliPID::EParticleType species,
139 ETPCgainScenario gainScenario ) const;
143 Double_t GetExpectedSignal(const Float_t mom,
144 AliPID::EParticleType n=AliPID::kKaon) const;
145 Double_t GetExpectedSigma(const Float_t mom, const Int_t nPoints,
146 AliPID::EParticleType n=AliPID::kKaon) const;
147 Float_t GetNumberOfSigmas(const Float_t mom,
150 AliPID::EParticleType n=AliPID::kKaon) const {
152 // Deprecated function (for backward compatibility). Please use
153 // GetNumberOfSigmas(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource )
157 Double_t bethe=GetExpectedSignal(mom,n);
158 Double_t sigma=GetExpectedSigma(mom,nPoints,n);
159 return (dEdx-bethe)/sigma;
162 Double_t GetMIP() const { return fMIP;}
163 Float_t GetRes0() const { return fRes0[0]; }
164 Float_t GetResN2() const { return fResN2[0]; }
165 Float_t GetRes0(ETPCgainScenario s) const { return fRes0[s]; }
166 Float_t GetResN2(ETPCgainScenario s) const { return fResN2[s]; }
169 Double_t GetExpectedSignal(const AliVTrack* track,
170 AliPID::EParticleType species,
172 const TSpline3* responseFunction,
173 Bool_t correctEta) const;
175 Double_t GetExpectedSigma(const AliVTrack* track,
176 AliPID::EParticleType species,
177 ETPCgainScenario gainScenario,
180 const TSpline3* responseFunction,
181 Bool_t correctEta) const;
183 Double_t GetEtaCorrection(const AliVTrack *track, Double_t dEdxSplines) const;
185 Double_t GetSigmaPar1(const AliVTrack *track, AliPID::EParticleType species,
186 Double_t dEdx, const TSpline3* responseFunction) const;
189 Float_t fMIP; // dEdx for MIP
190 Float_t fRes0[fgkNumberOfGainScenarios]; // relative dEdx resolution rel sigma = fRes0*sqrt(1+fResN2/npoint)
191 Float_t fResN2[fgkNumberOfGainScenarios]; // relative Npoint dependence rel sigma = fRes0*sqrt(1+fResN2/npoint)
193 Double_t fKp1; // Parameters
195 Double_t fKp3; // the ALEPH
196 Double_t fKp4; // Bethe-Bloch
197 Double_t fKp5; // formula
199 Bool_t fUseDatabase; // flag if fine-tuned database-response or simple ALEPH BB should be used
201 TObjArray fResponseFunctions; //! ObjArray of response functions individually for each particle
202 TVectorF fVoltageMap; //!stores a map of voltages wrt nominal for all chambers
203 Float_t fLowGainIROCthreshold; //voltage threshold below which the IROC is considered low gain
204 Float_t fBadIROCthreshhold; //voltage threshold for bad IROCS
205 Float_t fLowGainOROCthreshold; //voltage threshold below which the OROC is considered low gain
206 Float_t fBadOROCthreshhold; //voltage threshold for bad OROCS
207 Float_t fMaxBadLengthFraction; //the maximum allowed fraction of track length in a bad sector.
209 Int_t sectorNumber(Double_t phi) const;
211 Double_t fMagField; //! Magnetic field
213 static const char* fgkGainScenarioName[fgkNumberOfGainScenarios+1];
215 TH2D* fhEtaCorr; //! Map for TPC eta correction
216 TH2D* fhEtaSigmaPar1; //! Map for parameter 1 of the dEdx sigma parametrisation
218 Double_t fSigmaPar0; // Parameter 0 of the dEdx sigma parametrisation
220 ClassDef(AliTPCPIDResponse,5) // TPC PID class