1 #ifndef ALITPCROCVOLTERROR3D_H
2 #define ALITPCROCVOLTERROR3D_H
4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
7 ////////////////////////////////////////////////////////////////////////////
8 // AliTPCROCVoltError3D class //
9 // Authors: Jim Thomas, Stefan Rossegger //
10 ////////////////////////////////////////////////////////////////////////////
12 #include "AliTPCCorrection.h"
16 class AliTPCROCVoltError3D : public AliTPCCorrection {
18 AliTPCROCVoltError3D();
19 virtual ~AliTPCROCVoltError3D();
21 // initialization and update functions
23 virtual void Update(const TTimeStamp &timeStamp);
25 // common setters and getters for tangled ExB effect
26 virtual void SetOmegaTauT1T2(Float_t omegaTau,Float_t t1,Float_t t2) {
28 const Double_t wt0=t2*omegaTau; fC0=1./(1.+wt0*wt0);
29 const Double_t wt1=t1*omegaTau; fC1=wt1/(1.+wt1*wt1);
31 void SetC0C1(Float_t c0,Float_t c1) {fC0=c0;fC1=c1;} // CAUTION: USE WITH CARE
32 Float_t GetC0() const {return fC0;}
33 Float_t GetC1() const {return fC1;}
34 void SetROCData(TMatrixD * matrix);
35 // setters and getters
36 void SetROCDataFileName(const char * fname);
37 const Char_t* GetROCDataFileName() const {return fROCDataFileName.Data();}
39 // flag to wheter or not include the z aligment in the dz calculation
40 // if FALSE, the dz offset is purely due to the electric field change
41 void SetROCDisplacement(Bool_t flag) {
42 if (flag!=fROCdisplacement) { fROCdisplacement = flag; fInitLookUp=kFALSE; }
44 Bool_t GetROCDisplacement() const { return fROCdisplacement; }
46 // flag on wheter to consider the difference in the electron arrival between IROC and OROC
47 // due to the different position of the Anode wires
48 void SetElectronArrivalCorrection(Bool_t flag) {
49 if (flag!=fElectronArrivalCorrection) { fElectronArrivalCorrection = flag; fInitLookUp=kFALSE; }
51 Bool_t GetElectronArrivalCorrection() const { return fElectronArrivalCorrection; }
54 void InitROCVoltError3D(); // Fill the lookup tables
56 Float_t GetROCVoltOffset(Int_t side, Float_t r0, Float_t phi0);
57 TH2F* CreateHistoOfZAlignment(Int_t side, Int_t nx=250, Int_t ny=250);
59 virtual void Print(const Option_t* option="") const;
62 virtual void GetCorrection(const Float_t x[],const Short_t roc,Float_t dx[]);
66 AliTPCROCVoltError3D(const AliTPCROCVoltError3D &); // not implemented
67 AliTPCROCVoltError3D &operator=(const AliTPCROCVoltError3D &); // not implemented
69 Float_t fC0; // coefficient C0 (compare Jim Thomas's notes for definitions)
70 Float_t fC1; // coefficient C1 (compare Jim Thomas's notes for definitions)
72 Bool_t fROCdisplacement; // flag on wheter to consider the ROC displacement
73 // when calculating the z distortions
74 Bool_t fElectronArrivalCorrection; // flag on wheter to consider the difference
75 // in the electron arrival between IROC and OROC
76 // due to the different position of the Anode wires
79 Bool_t fInitLookUp; // flag to check it the Look Up table was created (SUM)
81 TMatrixD *fLookUpErOverEz[kNPhi]; // Array to store electric field integral (int Er/Ez)
82 TMatrixD *fLookUpEphiOverEz[kNPhi]; // Array to store electric field integral (int Er/Ez)
83 TMatrixD *fLookUpDeltaEz[kNPhi]; // Array to store electric field integral (int Er/Ez)
85 TString fROCDataFileName; // filename of the survey data containing the lin Fit values
86 TMatrixD *fdzDataLinFit; // Linear fits of dz survey points (each sector=72) (z0,slopeX,slopeY)
88 // basic numbers for the poisson relaxation //can be set individually in each class
89 enum {kRows =257}; // grid size in r direction used in the poisson relaxation // ( 2**n + 1 ) eg. 65, 129, 257 etc.
90 enum {kColumns=129}; // grid size in z direction used in the poisson relaxation // ( 2**m + 1 ) eg. 65, 129, 257 etc.
91 enum {kPhiSlicesPerSector=10}; // phi slices per sector
92 enum {kPhiSlices = 18*kPhiSlicesPerSector }; // number of points in phi for the basic lookup tables
93 enum {kIterations=100}; // Number of iterations within the poisson relaxation
95 ClassDef(AliTPCROCVoltError3D,1);