Correction classes + the Demo
[u/mrichter/AliRoot.git] / TPC / AliTPCExBBShape.h
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0116859c 1#ifndef ALI_TPC_EXB_B_SHAPE_H
2#define ALI_TPC_EXB_B_SHAPE_H
3
4/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
6
7////////////////////////////////////////////////////////////////////////////
8// //
9// AliExBBShape class //
10// The class calculates the space point distortions due to the B field //
11// shape imperfections using a second order technique based on integrals //
12// over Bz (e.g. int By/Bz) obtained via the AliMagF class //
13// The class allows "effective Omega Tau" corrections. //
14// //
15// date: 27/04/2010 //
16// Authors: Magnus Mager, Jim Thomas, Stefan Rossegger //
17////////////////////////////////////////////////////////////////////////////
18
19#include "AliTPCCorrection.h"
20
21class AliMagF;
22
23class AliTPCExBBShape : public AliTPCCorrection {
24public:
25 AliTPCExBBShape();
26 virtual ~AliTPCExBBShape();
27
28 // common setters and getters for ExB
29 virtual void SetOmegaTauT1T2(Float_t omegaTau,Float_t t1,Float_t t2) {
30 const Float_t wt1=t1*omegaTau;
31 fC1=wt1/(1.+wt1*wt1);
32 const Float_t wt2=t2*omegaTau;
33 fC2=wt2*wt2/(1.+wt2*wt2);
34 };
35 void SetC1C2(Float_t c1,Float_t c2) {fC1=c1;fC2=c2;} // CAUTION: USE WITH CARE
36 Float_t GetC1() const {return fC1;}
37 Float_t GetC2() const {return fC2;}
38
39 // setters and getters for the magentic field map
40 void SetBField(AliMagF *bField) {fBField=bField;}
41 AliMagF* GetBField() const {return fBField;}
42
43 virtual void GetCorrection(const Float_t x[],const Short_t roc,Float_t dx[]);
44 void GetBxAndByOverBz(const Float_t x[],const Short_t roc,Float_t BxByOverBz[]);
45
46 virtual void Print(Option_t* option="") const;
47
48private:
49 Float_t fC1; // coefficient C1 (compare Jim Thomas's notes for definitions)
50 Float_t fC2; // coefficient C2 (compare Jim Thomas's notes for definitions)
51
52 AliMagF *fBField;
53
54 AliTPCExBBShape & operator =(const AliTPCExBBShape);
55 AliTPCExBBShape(const AliTPCExBBShape&); //dummy copy contructor
56
57 ClassDef(AliTPCExBBShape,1);
58};
59
60#endif