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 ////////////////////////////////////////////////////////////////////////////
9 // AliTPCBoundaryVoltError class //
10 // date: 01/06/2010 //
11 // Authors: Jim Thomas, Stefan Rossegger //
12 ////////////////////////////////////////////////////////////////////////////
14 #include "AliTPCCorrection.h"
17 class AliTPCBoundaryVoltError : public AliTPCCorrection {
19 AliTPCBoundaryVoltError();
20 virtual ~AliTPCBoundaryVoltError();
22 // initialization and update functions
24 virtual void Update(const TTimeStamp &timeStamp);
27 // common setters and getters for tangled ExB effect
28 virtual void SetOmegaTauT1T2(Float_t omegaTau,Float_t t1,Float_t t2) {
30 const Double_t wt0=t2*omegaTau; fC0=1./(1.+wt0*wt0);
31 const Double_t wt1=t1*omegaTau; fC1=wt1/(1.+wt1*wt1);
33 void SetC0C1(Float_t c0,Float_t c1) {fC0=c0;fC1=c1;} // CAUTION: USE WITH CARE
34 Float_t GetC0() const {return fC0;}
35 Float_t GetC1() const {return fC1;}
37 // setters and getters for conical
38 void SetBoundariesA(Float_t boundariesA[8]);
39 void SetBoundariesC(Float_t boundariesC[6]); // CE settings from the A side
40 Float_t GetBoundariesA(Int_t i) const {return fBoundariesA[i]; }
41 Float_t GetBoundariesC(Int_t i) const {return fBoundariesC[i]; }
43 void SetROCDisplacement(Bool_t flag) {
44 if (flag!=fROCdisplacement) { fROCdisplacement = flag; fInitLookUp=kFALSE; }
46 Bool_t GetROCDisplacement() const { return fROCdisplacement; }
48 void InitBoundaryVoltErrorDistortion();
50 virtual void Print(const Option_t* option="") const;
53 virtual void GetCorrection(const Float_t x[],const Short_t roc,Float_t dx[]);
56 Float_t fC0; // coefficient C0 (compare Jim Thomas's notes for definitions)
57 Float_t fC1; // coefficient C1 (compare Jim Thomas's notes for definitions)
58 Float_t fBoundariesA[8]; // Boundary values on the A side (see Setter function)
59 Float_t fBoundariesC[8]; // Boundary values on the C side (see Setter function)
61 Bool_t fROCdisplacement; // flag for ROC displacement (important for z distortions)
62 Bool_t fInitLookUp; // flag to check it the Look Up table was created
64 Double_t fLookUpErOverEz[kNZ][kNR]; // Array to store electric field integral (int Er/Ez)
65 Double_t fLookUpDeltaEz[kNZ][kNR]; // Array to store electric field integral (int Delta Ez)
67 // basic numbers for the poisson relaxation //can be set individually in each class
68 enum {kRows =257}; // grid size in r direction used in the poisson relaxation // ( 2**n + 1 ) eg. 65, 129, 257 etc.
69 enum {kColumns=257}; // grid size in r direction used in the poisson relaxation // ( 2**m + 1 ) eg. 65, 129, 257 etc.
70 enum {kIterations=100}; // Number of iterations within the poisson relaxation
72 ClassDef(AliTPCBoundaryVoltError,0);