1 #ifndef ALITPCBOUNDARYVOLTERROR_H
2 #define ALITPCBOUNDARYVOLTERROR_H
4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
7 ////////////////////////////////////////////////////////////////////////////
8 // AliTPCBoundaryVoltError class //
10 // Authors: Jim Thomas, Stefan Rossegger //
11 ////////////////////////////////////////////////////////////////////////////
13 #include "AliTPCCorrection.h"
16 class AliTPCBoundaryVoltError : public AliTPCCorrection {
18 AliTPCBoundaryVoltError();
19 virtual ~AliTPCBoundaryVoltError();
21 // initialization and update functions
23 virtual void Update(const TTimeStamp &timeStamp);
26 // common setters and getters for tangled ExB effect
27 virtual void SetOmegaTauT1T2(Float_t omegaTau,Float_t t1,Float_t t2) {
29 const Double_t wt0=t2*omegaTau; fC0=1./(1.+wt0*wt0);
30 const Double_t wt1=t1*omegaTau; fC1=wt1/(1.+wt1*wt1);
32 void SetC0C1(Float_t c0,Float_t c1) {fC0=c0;fC1=c1;} // CAUTION: USE WITH CARE
33 Float_t GetC0() const {return fC0;}
34 Float_t GetC1() const {return fC1;}
36 // setters and getters for conical
37 void SetBoundariesA(Float_t boundariesA[8]);
38 void SetBoundariesC(Float_t boundariesC[6]); // CE settings from the A side
39 Float_t GetBoundariesA(Int_t i) const {return fBoundariesA[i]; }
40 Float_t GetBoundariesC(Int_t i) const {return fBoundariesC[i]; }
42 void SetROCDisplacement(Bool_t flag) {
43 if (flag!=fROCdisplacement) { fROCdisplacement = flag; fInitLookUp=kFALSE; }
45 Bool_t GetROCDisplacement() const { return fROCdisplacement; }
47 void InitBoundaryVoltErrorDistortion();
49 virtual void Print(const Option_t* option="") const;
52 virtual void GetCorrection(const Float_t x[],const Short_t roc,Float_t dx[]);
55 Float_t fC0; // coefficient C0 (compare Jim Thomas's notes for definitions)
56 Float_t fC1; // coefficient C1 (compare Jim Thomas's notes for definitions)
57 Float_t fBoundariesA[8]; // Boundary values on the A side (see Setter function)
58 Float_t fBoundariesC[8]; // Boundary values on the C side (see Setter function)
60 Bool_t fROCdisplacement; // flag for ROC displacement (important for z distortions)
61 Bool_t fInitLookUp; // flag to check it the Look Up table was created
63 Double_t fLookUpErOverEz[kNZ][kNR]; // Array to store electric field integral (int Er/Ez)
64 Double_t fLookUpDeltaEz[kNZ][kNR]; // Array to store electric field integral (int Delta Ez)
66 // basic numbers for the poisson relaxation //can be set individually in each class
67 enum {kRows =257}; // grid size in r direction used in the poisson relaxation // ( 2**n + 1 ) eg. 65, 129, 257 etc.
68 enum {kColumns=257}; // grid size in r direction used in the poisson relaxation // ( 2**m + 1 ) eg. 65, 129, 257 etc.
69 enum {kIterations=100}; // Number of iterations within the poisson relaxation
71 ClassDef(AliTPCBoundaryVoltError,1);