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cc3e558a | 1 | #ifndef ALITPCSPACECHARGE3D_H |
2 | #define ALITPCSPACECHARGE3D_H | |
3 | ||
4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
5 | * See cxx source for full Copyright notice */ | |
6 | ||
7 | //////////////////////////////////////////////////////////////////////////// | |
b4caed64 | 8 | // AliTPCSpaceCharge3D class // |
cc3e558a | 9 | // Authors: Stefan Rossegger // |
10 | //////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | #include "AliTPCCorrection.h" | |
13 | class TH3F; | |
14 | ||
15 | class AliTPCSpaceCharge3D : public AliTPCCorrection { | |
16 | public: | |
17 | AliTPCSpaceCharge3D(); | |
18 | virtual ~AliTPCSpaceCharge3D(); | |
19 | ||
20 | // initialization and update functions | |
21 | virtual void Init(); | |
22 | virtual void Update(const TTimeStamp &timeStamp); | |
23 | ||
24 | // common setters and getters for tangled ExB effect | |
25 | virtual void SetOmegaTauT1T2(Float_t omegaTau,Float_t t1,Float_t t2) { | |
26 | fT1=t1; fT2=t2; | |
27 | const Double_t wt0=t2*omegaTau; fC0=1./(1.+wt0*wt0); | |
28 | const Double_t wt1=t1*omegaTau; fC1=wt1/(1.+wt1*wt1); | |
29 | }; | |
30 | void SetC0C1(Float_t c0,Float_t c1) {fC0=c0;fC1=c1;} // CAUTION: USE WITH CARE | |
31 | Float_t GetC0() const {return fC0;} | |
32 | Float_t GetC1() const {return fC1;} | |
33 | ||
34 | // setters and getters | |
35 | void SetCorrectionFactor(Float_t correctionFactor) {fCorrectionFactor=correctionFactor;} | |
36 | Float_t GetCorrectionFactor() const {return fCorrectionFactor;} | |
37 | ||
15687d71 | 38 | void SetSCDataFileName(TString fname); |
39 | const char* GetSCDataFileName() { return fSCDataFileName.Data(); } | |
cc3e558a | 40 | |
15687d71 | 41 | void InitSpaceCharge3DDistortion(); // faster model and more accurate ;-) |
42 | void InitSpaceCharge3DDistortionCourse(); // real 3D but not accurate enough | |
2bf29b72 | 43 | void ForceInitSpaceCharge3DDistortion() { fInitLookUp=kFALSE; InitSpaceCharge3DDistortion(); } |
cc3e558a | 44 | |
15687d71 | 45 | Float_t GetSpaceChargeDensity(Float_t r, Float_t phi, Float_t z, Int_t mode=0); |
46 | TH2F* CreateHistoSCinXY(Float_t z, Int_t nx=100, Int_t ny=100, Int_t mode=0); | |
47 | TH2F* CreateHistoSCinZR(Float_t phi, Int_t nz=100, Int_t nr=100, Int_t mode=0); | |
cc3e558a | 48 | |
49 | ||
50 | void WriteChargeDistributionToFile(const char* fname = "SC-Alice.root"); | |
51 | ||
52 | virtual void Print(const Option_t* option="") const; | |
53 | ||
54 | protected: | |
55 | virtual void GetCorrection(const Float_t x[],const Short_t roc,Float_t dx[]); | |
56 | ||
57 | private: | |
58 | ||
9f3b99e2 | 59 | // maximum sizes of lookup tables |
60 | enum {kNRows= 90 }; // the maximum on row-slices so far ~ 2cm slicing | |
61 | enum {kNPhiSlices= 144 }; // the maximum of phi-slices so far = (8 per sector) | |
62 | enum {kNColumns= 130 }; // the maximum on column-slices so ~ 2cm slicing | |
63 | ||
cc3e558a | 64 | AliTPCSpaceCharge3D(const AliTPCSpaceCharge3D &); // not implemented |
65 | AliTPCSpaceCharge3D &operator=(const AliTPCSpaceCharge3D &); // not implemented | |
66 | ||
67 | Float_t fC0; // coefficient C0 (compare Jim Thomas's notes for definitions) | |
68 | Float_t fC1; // coefficient C1 (compare Jim Thomas's notes for definitions) | |
69 | Float_t fCorrectionFactor; // Space Charge Correction factor in comparison to initialized | |
70 | // look up table which was created for M_mb = 900 and IR = 3000 | |
71 | // compare Internal Note Nr: ??? | |
72 | ||
2bf29b72 | 73 | Bool_t fInitLookUp; // flag to check if the Look Up table was created |
cc3e558a | 74 | |
2bf29b72 | 75 | TMatrixF *fLookUpErOverEz[kNPhi]; // Array to store electric field integral (int Er/Ez) |
76 | TMatrixF *fLookUpEphiOverEz[kNPhi]; // Array to store electric field integral (int Er/Ez) | |
77 | TMatrixF *fLookUpDeltaEz[kNPhi]; // Array to store electric field integral (int Er/Ez) | |
cc3e558a | 78 | |
15687d71 | 79 | TString fSCDataFileName; // file which contains the space charge distribution |
80 | TString fSCLookUpPOCsFileName3D; // filename of the precalculated lookup tables (for individual voxels) | |
81 | TString fSCLookUpPOCsFileNameRZ; // filename of the precalculated lookup tables (for individual voxels) | |
82 | TString fSCLookUpPOCsFileNameRPhi; // filename of the precalculated lookup tables (for individual voxels) | |
cc3e558a | 83 | |
15687d71 | 84 | |
2bf29b72 | 85 | TMatrixF *fSCdensityDistribution[kNPhi]; // 3D space charge distribution |
15687d71 | 86 | TMatrixD *fSCdensityInRZ; // (r,z) space charge distribution |
87 | TMatrixD *fSCdensityInRPhiA; // (r,phi) space charge distribution | |
88 | TMatrixD *fSCdensityInRPhiC; // (r,phi) space charge distribution | |
cc3e558a | 89 | |
2bf29b72 | 90 | ClassDef(AliTPCSpaceCharge3D,2); |
cc3e558a | 91 | }; |
92 | ||
93 | #endif |