added a new class/task for light nuclei
[u/mrichter/AliRoot.git] / STEER / STEERBase / AliTPCPIDResponse.h
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10d100d4 1#ifndef ALITPCPIDRESPONSE_H
2#define ALITPCPIDRESPONSE_H
8c6a71ab 3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6//-------------------------------------------------------
7// TPC PID class
8// A very naive design... Should be made better by the detector experts...
9// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
aea7a46d 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
f84b18dd 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
8c6a71ab 17//-------------------------------------------------------
18#include <Rtypes.h>
644666df 19
20#include <TNamed.h>
21#include <TVectorF.h>
d2aa6df0 22#include <TObjArray.h>
8c6a71ab 23
aea7a46d 24#include "AliPID.h"
f84b18dd 25#include "AliVTrack.h"
aea7a46d 26
f84b18dd 27class TH2D;
644666df 28class TSpline3;
29
30class AliTPCPIDResponse: public TNamed {
8c6a71ab 31public:
10d100d4 32 AliTPCPIDResponse();
1b45e564 33 //TODO Remove? AliTPCPIDResponse(const Double_t *param);
644666df 34 AliTPCPIDResponse(const AliTPCPIDResponse&);
35 AliTPCPIDResponse& operator=(const AliTPCPIDResponse&);
f84b18dd 36 virtual ~AliTPCPIDResponse();
644666df 37
38 enum EChamberStatus {
39 kChamberOff=0,
40 kChamberHighGain=1,
41 kChamberLowGain=2,
42 kChamberInvalid=3
43 };
44
45 enum ETPCgainScenario {
46 kDefault= 0,
47 kALLhigh = 1,
48 kOROChigh = 2,
49 kGainScenarioInvalid = 3
50 };
51
52 static const Int_t fgkNumberOfParticleSpecies=AliPID::kSPECIESC;
53 static const Int_t fgkNumberOfGainScenarios=3;
54 static const Int_t fgkNumberOfdEdxSourceScenarios=3;
55
56 enum ETPCdEdxSource {
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
61 };
62
10d100d4 63 void SetSigma(Float_t res0, Float_t resN2);
aea7a46d 64 void SetBetheBlochParameters(Double_t kp1,
65 Double_t kp2,
66 Double_t kp3,
67 Double_t kp4,
68 Double_t kp5
69 );
1b45e564 70 //Better prevent user from setting fMIP != 50. because fMIP set fix to 50 for much other code:
10d100d4 71 void SetMip(Float_t mip) { fMIP = mip; } // Set overall normalisation; mean dE/dx for MIP
aea7a46d 72 Double_t Bethe(Double_t bg) const;
d2aa6df0 73 void SetUseDatabase(Bool_t useDatabase) { fUseDatabase = useDatabase;}
644666df 74 Bool_t GetUseDatabase() const { return fUseDatabase;}
d2aa6df0 75
76 void SetResponseFunction(AliPID::EParticleType type, TObject * const o) { fResponseFunctions.AddAt(o,(Int_t)type); }
deae51a8 77 const TObject * GetResponseFunction(AliPID::EParticleType type) { return fResponseFunctions.At((Int_t)type); }
644666df 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;}
86
87 void SetMagField(Double_t mf) { fMagField=mf; }
d2aa6df0 88
f84b18dd 89 const TH2D* GetEtaCorrMap() const { return fhEtaCorr; };
90 Bool_t SetEtaCorrMap(TH2D* hMap);
91
92 Double_t GetEtaCorrection(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
93
94 Double_t GetEtaCorrectedTrackdEdx(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
95
96 const TH2D* GetSigmaPar1Map() const { return fhEtaSigmaPar1; };
97 Double_t GetSigmaPar0() const { return fSigmaPar0; };
98 Bool_t SetSigmaParams(TH2D* hSigmaPar1Map, Double_t sigmaPar0);
99
100 Double_t GetSigmaPar1(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource = kdEdxDefault) const;
101
644666df 102 //NEW
103 void SetSigma(Float_t res0, Float_t resN2, ETPCgainScenario gainScenario );
644666df 104 Double_t GetExpectedSignal( const AliVTrack* track,
105 AliPID::EParticleType species,
f84b18dd 106 ETPCdEdxSource dedxSource = kdEdxDefault,
107 Bool_t correctEta = kFALSE) const;//TODO: In future, default kTRUE
644666df 108 Double_t GetExpectedSigma( const AliVTrack* track,
109 AliPID::EParticleType species,
f84b18dd 110 ETPCdEdxSource dedxSource = kdEdxDefault,
111 Bool_t correctEta = kFALSE) const;//TODO: In future, default kTRUE
644666df 112 Float_t GetNumberOfSigmas( const AliVTrack* track,
113 AliPID::EParticleType species,
f84b18dd 114 ETPCdEdxSource dedxSource = kdEdxDefault,
115 Bool_t correctEta = kFALSE) const;//TODO: In future, default kTRUE
644666df 116
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,
f84b18dd 125 ETPCdEdxSource dedxSource = kdEdxDefault) const;
644666df 126 Bool_t ResponseFunctiondEdxN(const AliVTrack* track,
127 AliPID::EParticleType species,
f84b18dd 128 ETPCdEdxSource dedxSource,
129 Double_t& dEdx, Int_t& nPoints, ETPCgainScenario& gainScenario, TSpline3** responseFunction) const;
f85a3764 130 Bool_t sectorNumbersInOut(Double_t* trackPositionInner,
131 Double_t* trackPositionOuter,
644666df 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;
140 void ResetSplines();
141
644666df 142 //OLD
10d100d4 143 Double_t GetExpectedSignal(const Float_t mom,
aea7a46d 144 AliPID::EParticleType n=AliPID::kKaon) const;
10d100d4 145 Double_t GetExpectedSigma(const Float_t mom, const Int_t nPoints,
644666df 146 AliPID::EParticleType n=AliPID::kKaon) const;
147 Float_t GetNumberOfSigmas(const Float_t mom,
148 const Float_t dEdx,
149 const Int_t nPoints,
150 AliPID::EParticleType n=AliPID::kKaon) const {
f84b18dd 151 //
152 // Deprecated function (for backward compatibility). Please use
153 // GetNumberOfSigmas(const AliVTrack *track, AliPID::EParticleType species, ETPCdEdxSource dedxSource )
154 // instead!TODO
155 //
156
10d100d4 157 Double_t bethe=GetExpectedSignal(mom,n);
158 Double_t sigma=GetExpectedSigma(mom,nPoints,n);
159 return (dEdx-bethe)/sigma;
160 }
aea7a46d 161
10d100d4 162 Double_t GetMIP() const { return fMIP;}
644666df 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]; }
b981edcd 167
f84b18dd 168protected:
169 Double_t GetExpectedSignal(const AliVTrack* track,
170 AliPID::EParticleType species,
171 Double_t dEdx,
172 const TSpline3* responseFunction,
173 Bool_t correctEta) const;
174
175 Double_t GetExpectedSigma(const AliVTrack* track,
176 AliPID::EParticleType species,
177 ETPCgainScenario gainScenario,
178 Double_t dEdx,
179 Int_t nPoints,
180 const TSpline3* responseFunction,
181 Bool_t correctEta) const;
182
183 Double_t GetEtaCorrection(const AliVTrack *track, Double_t dEdxSplines) const;
184
185 Double_t GetSigmaPar1(const AliVTrack *track, AliPID::EParticleType species,
186 Double_t dEdx, const TSpline3* responseFunction) const;
187
8c6a71ab 188private:
10d100d4 189 Float_t fMIP; // dEdx for MIP
644666df 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)
aea7a46d 192
193 Double_t fKp1; // Parameters
194 Double_t fKp2; // of
195 Double_t fKp3; // the ALEPH
196 Double_t fKp4; // Bethe-Bloch
197 Double_t fKp5; // formula
198
d2aa6df0 199 Bool_t fUseDatabase; // flag if fine-tuned database-response or simple ALEPH BB should be used
644666df 200
d2aa6df0 201 TObjArray fResponseFunctions; //! ObjArray of response functions individually for each particle
644666df 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.
208
644666df 209 Int_t sectorNumber(Double_t phi) const;
210
211 Double_t fMagField; //! Magnetic field
212
213 static const char* fgkGainScenarioName[fgkNumberOfGainScenarios+1];
d2aa6df0 214
f84b18dd 215 TH2D* fhEtaCorr; //! Map for TPC eta correction
216 TH2D* fhEtaSigmaPar1; //! Map for parameter 1 of the dEdx sigma parametrisation
217
218 Double_t fSigmaPar0; // Parameter 0 of the dEdx sigma parametrisation
219
220 ClassDef(AliTPCPIDResponse,5) // TPC PID class
8c6a71ab 221};
222
223#endif
224
225