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b1f0a2a5 | 1 | #ifndef ALI_TPC_EX_BB_SHAPE_H |
2 | #define ALI_TPC_EX_BB_SHAPE_H | |
0116859c | 3 | |
4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
5 | * See cxx source for full Copyright notice */ | |
6 | ||
b4caed64 | 7 | // _________________________________________________________________ |
8 | // | |
9 | // Begin_Html | |
10 | // <h2>AliExBBShape class </h2> | |
11 | // The class calculates the space point distortions due to the B field | |
12 | // shape imperfections using a second order technique based on integrals | |
13 | // over Bz (e.g. int By/Bz) obtained via the AliMagF class. The essential | |
14 | // input for this class is the magnetic field maps which can be set via the function SetBField. | |
15 | // <p> | |
16 | // The class allows "effective Omega Tau" corrections. | |
17 | // End_Html | |
6a1caa6b | 18 | // Begin_Macro(source) |
b4caed64 | 19 | // { |
20 | // gROOT->SetStyle("Plain"); gStyle->SetPalette(1); | |
6a1caa6b | 21 | // TCanvas *c2 = new TCanvas("cAliTPCExBBShape","cAliTPCExBBShape",500,300); |
b4caed64 | 22 | // AliTPCExBBShape exb; |
23 | // AliMagF mag("mag","mag"); // 0.5 Tesla (solenoid) | |
24 | // exb.SetBField(&mag); // use Bfield from AliMagF | |
25 | // exb.SetOmegaTauT1T2(-0.32,1.,1.); // values ideally from OCDB | |
26 | // exb.CreateHistoDRPhiinZR(0,100,100)->Draw("surf2"); | |
27 | // return c2; | |
28 | // } | |
29 | // End_Macro | |
30 | // Begin_Html | |
31 | // <p> | |
32 | // Date: 27/04/2010 <br> | |
33 | // Authors: Magnus Mager, Jim Thomas, Stefan Rossegger | |
34 | // End_Html | |
35 | // _________________________________________________________________ | |
0116859c | 36 | |
37 | #include "AliTPCCorrection.h" | |
38 | ||
39 | class AliMagF; | |
40 | ||
41 | class AliTPCExBBShape : public AliTPCCorrection { | |
42 | public: | |
43 | AliTPCExBBShape(); | |
44 | virtual ~AliTPCExBBShape(); | |
45 | ||
e527a1b9 | 46 | // initialization and update functions |
47 | virtual void Init(); | |
48 | virtual void Update(const TTimeStamp &timeStamp); | |
49 | ||
0116859c | 50 | // common setters and getters for ExB |
51 | virtual void SetOmegaTauT1T2(Float_t omegaTau,Float_t t1,Float_t t2) { | |
534fd34a | 52 | fT1=t1; fT2=t2; |
b1f0a2a5 | 53 | const Float_t wt1=t1*omegaTau; fC1=wt1/(1.+wt1*wt1); |
54 | const Float_t wt2=t2*omegaTau; fC2=wt2*wt2/(1.+wt2*wt2); | |
0116859c | 55 | }; |
56 | void SetC1C2(Float_t c1,Float_t c2) {fC1=c1;fC2=c2;} // CAUTION: USE WITH CARE | |
57 | Float_t GetC1() const {return fC1;} | |
58 | Float_t GetC2() const {return fC2;} | |
59 | ||
60 | // setters and getters for the magentic field map | |
b1f0a2a5 | 61 | void SetBField(const AliMagF *bField) {fBField=(AliMagF*)bField;} |
0116859c | 62 | AliMagF* GetBField() const {return fBField;} |
63 | ||
64 | virtual void GetCorrection(const Float_t x[],const Short_t roc,Float_t dx[]); | |
65 | void GetBxAndByOverBz(const Float_t x[],const Short_t roc,Float_t BxByOverBz[]); | |
66 | ||
67 | virtual void Print(Option_t* option="") const; | |
46e89793 | 68 | static Double_t GetBFieldXYZ(Double_t gx, Double_t gy, Double_t gz, Int_t axisType); |
0116859c | 69 | |
70 | private: | |
71 | Float_t fC1; // coefficient C1 (compare Jim Thomas's notes for definitions) | |
72 | Float_t fC2; // coefficient C2 (compare Jim Thomas's notes for definitions) | |
73 | ||
b1f0a2a5 | 74 | AliMagF *fBField; // pointer to magnetic field |
0116859c | 75 | |
76 | AliTPCExBBShape & operator =(const AliTPCExBBShape); | |
77 | AliTPCExBBShape(const AliTPCExBBShape&); //dummy copy contructor | |
78 | ||
534fd34a | 79 | ClassDef(AliTPCExBBShape,2); |
0116859c | 80 | }; |
81 | ||
82 | #endif |