3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
7 // Interface between the TVirtualMagField and AliMagWrapCheb: wrapper to
8 // the set of magnetic field data + Tosca parameterization by
9 // Chebyshev polynomials
11 // Author: ruben.shahoyan@cern.ch
14 //#include <TGeoGlobalMagField.h>
15 #include <TVirtualMagField.h>
18 class AliMagF : public TVirtualMagField
21 enum BMap_t {k2kG, k5kG, k5kGUniform};
22 enum BeamType_t {kBeamTypeAA, kBeamTypepp, kNoBeamField};
23 enum PolarityConvention_t {kConvLHC,kConvDCS2008,kConvMap2005};
26 AliMagF(const char *name, const char* title, Int_t integ,
27 Double_t factorSol=1., Double_t factorDip=1.,
28 Double_t fmax=15, BMap_t maptype = k5kG,
29 const char* path="$(ALICE_ROOT)/data/maps/mfchebKGI_sym.root",
30 BeamType_t btype=kBeamTypepp, Double_t benergy=7000.);
31 AliMagF(const AliMagF& src);
32 AliMagF& operator=(const AliMagF& src);
35 virtual void Field(const Double_t *x, Double_t *b);
36 void GetTPCInt(const Double_t *xyz, Double_t *b) const;
37 void GetTPCIntCyl(const Double_t *rphiz, Double_t *b) const;
38 Double_t GetBz(const Double_t *xyz) const;
40 AliMagWrapCheb* GetMeasuredMap() const {return fMeasuredMap;}
42 // former AliMagF methods or their aliases
43 void SetFactorSol(Float_t fc=1.);
44 void SetFactorDip(Float_t fc=1.);
45 Double_t GetFactorSol() const;
46 Double_t GetFactorDip() const;
47 Double_t Factor() const {return GetFactorSol();}
48 Bool_t IsUniform() const {return fMapType == k5kGUniform;}
50 void MachineField(const Double_t *x, Double_t *b) const;
51 BMap_t GetMapType() const {return fMapType;}
52 BeamType_t GetBeamType() const {return fBeamType;}
53 Double_t GetBeamEnergy() const {return fBeamEnergy;}
54 Double_t Max() const {return fMax;}
55 Int_t Integ() const {return fInteg;}
56 Int_t PrecInteg() const {return fPrecInteg;}
57 Double_t SolenoidField() const {return fFactorSol*fSolenoid;}
59 Char_t* GetDataFileName() const {return (Char_t*)fParNames.GetName();}
60 Char_t* GetParamName() const {return (Char_t*)fParNames.GetTitle();}
61 void SetDataFileName(const Char_t* nm) {fParNames.SetName(nm);}
62 void SetParamName(const Char_t* nm) {fParNames.SetTitle(nm);}
64 Bool_t LoadParameterization();
65 static Int_t GetPolarityConvention() {return Int_t(fgkPolarityConvention);}
68 // not supposed to be changed during the run, set only at the initialization via constructor
69 void InitMachineField(BeamType_t btype, Double_t benergy);
70 void SetBeamType(BeamType_t type) {fBeamType = type;}
71 void SetBeamEnergy(Float_t energy) {fBeamEnergy = energy;}
74 AliMagWrapCheb* fMeasuredMap; //! Measured part of the field map
75 BMap_t fMapType; // field map type
76 Double_t fSolenoid; // Solenoid field setting
77 BeamType_t fBeamType; // Beam type: A-A (fBeamType=0) or p-p (fBeamType=1)
78 Double_t fBeamEnergy; // Beam energy in GeV
80 Int_t fInteg; // Default integration method as indicated in Geant
81 Int_t fPrecInteg; // Alternative integration method, e.g. for higher precision
82 Double_t fFactorSol; // Multiplicative factor for solenoid
83 Double_t fFactorDip; // Multiplicative factor for dipole
84 Double_t fMax; // Max Field as indicated in Geant
85 Bool_t fDipoleOFF; // Dipole ON/OFF flag
87 Double_t fQuadGradient; // Gradient field for inner triplet quadrupoles
88 Double_t fDipoleField; // Field value for D1 and D2 dipoles
89 Double_t fCCorrField; // Side C 2nd compensator field
90 Double_t fACorr1Field; // Side A 1st compensator field
91 Double_t fACorr2Field; // Side A 2nd compensator field
93 TNamed fParNames; // file and parameterization loadad
95 static const Double_t fgkSol2DipZ; // conventional Z of transition from L3 to Dipole field
96 static const UShort_t fgkPolarityConvention; // convention for the mapping of the curr.sign on main component sign
98 ClassDef(AliMagF, 2) // Class for all Alice MagField wrapper for measured data + Tosca parameterization