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1 #ifndef ALIMAGF_H
2 #define ALIMAGF_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4  * See cxx source for full Copyright notice                               */
5
6 //
7 // Interface between the TVirtualMagField and AliMagWrapCheb: wrapper to
8 // the set of magnetic field data + Tosca parameterization by 
9 // Chebyshev polynomials
10 // 
11 // Author: ruben.shahoyan@cern.ch
12 //
13
14 //#include <TGeoGlobalMagField.h>
15 #include <TVirtualMagField.h>
16 class AliMagWrapCheb;
17
18 class AliMagF : public TVirtualMagField
19 {
20  public:
21   enum BMap_t      {k2kG, k5kG, k5kGUniform};
22   enum BeamType_t  {kBeamTypeAA, kBeamTypepp, kNoBeamField};
23   enum PolarityConvention_t {kConvLHC,kConvDCS2008,kConvMap2005};
24   enum             {kOverrideGRP=BIT(14)}; // don't recreate from GRP if set
25   //
26   AliMagF();
27   AliMagF(const char *name, const char* title, Int_t integ, 
28           Double_t factorSol=1., Double_t factorDip=1., 
29           Double_t fmax=15, BMap_t maptype = k5kG,
30           const char* path="$(ALICE_ROOT)/data/maps/mfchebKGI_sym.root",
31           BeamType_t btype=kBeamTypepp, Double_t benergy=7000.);
32   AliMagF(const AliMagF& src);             
33   AliMagF& operator=(const AliMagF& src);
34   virtual ~AliMagF();
35   //
36   virtual void Field(const Double_t *x, Double_t *b);
37   void       GetTPCInt(const Double_t *xyz, Double_t *b)        const;
38   void       GetTPCIntCyl(const Double_t *rphiz, Double_t *b)   const;
39   Double_t   GetBz(const Double_t *xyz)                         const;
40   //
41   AliMagWrapCheb* GetMeasuredMap()                              const {return fMeasuredMap;}
42   //
43   // former AliMagF methods or their aliases
44   void         SetFactorSol(Float_t fc=1.);
45   void         SetFactorDip(Float_t fc=1.);
46   Double_t     GetFactorSol()                                   const;
47   Double_t     GetFactorDip()                                   const;
48   Double_t     Factor()                                         const {return GetFactorSol();}
49   Bool_t       IsUniform()                                      const {return fMapType == k5kGUniform;}
50   //
51   void         MachineField(const Double_t  *x, Double_t *b)    const;
52   BMap_t       GetMapType()                                     const {return fMapType;}
53   BeamType_t   GetBeamType()                                    const {return fBeamType;}
54   Double_t     GetBeamEnergy()                                  const {return fBeamEnergy;}
55   Double_t     Max()                                            const {return fMax;}
56   Int_t        Integ()                                          const {return fInteg;}
57   Int_t        PrecInteg()                                      const {return fPrecInteg;}  
58   Double_t     SolenoidField()                                  const {return fFactorSol*fSolenoid;}
59   //
60   Char_t*      GetDataFileName()                                const {return (Char_t*)fParNames.GetName();}
61   Char_t*      GetParamName()                                   const {return (Char_t*)fParNames.GetTitle();}
62   void         SetDataFileName(const Char_t* nm)                      {fParNames.SetName(nm);}
63   void         SetParamName(const Char_t* nm)                         {fParNames.SetTitle(nm);}
64   //
65   Bool_t       LoadParameterization();
66   static Int_t GetPolarityConvention()                                {return Int_t(fgkPolarityConvention);}
67   //
68  protected:
69   // not supposed to be changed during the run, set only at the initialization via constructor
70   void         InitMachineField(BeamType_t btype, Double_t benergy);
71   void         SetBeamType(BeamType_t type)                           {fBeamType = type;}
72   void         SetBeamEnergy(Float_t energy)                          {fBeamEnergy = energy;}
73   //
74  protected:
75   AliMagWrapCheb*  fMeasuredMap;     //! Measured part of the field map
76   BMap_t           fMapType;         // field map type
77   Double_t         fSolenoid;        // Solenoid field setting
78   BeamType_t       fBeamType;        // Beam type: A-A (fBeamType=0) or p-p (fBeamType=1)
79   Double_t         fBeamEnergy;      // Beam energy in GeV
80   // 
81   Int_t            fInteg;           // Default integration method as indicated in Geant
82   Int_t            fPrecInteg;       // Alternative integration method, e.g. for higher precision
83   Double_t         fFactorSol;       // Multiplicative factor for solenoid
84   Double_t         fFactorDip;       // Multiplicative factor for dipole
85   Double_t         fMax;             // Max Field as indicated in Geant
86   Bool_t           fDipoleOFF;       // Dipole ON/OFF flag
87   //
88   Double_t         fQuadGradient;    // Gradient field for inner triplet quadrupoles
89   Double_t         fDipoleField;     // Field value for D1 and D2 dipoles
90   Double_t         fCCorrField;      // Side C 2nd compensator field
91   Double_t         fACorr1Field;     // Side A 1st compensator field 
92   Double_t         fACorr2Field;     // Side A 2nd compensator field
93   //
94   TNamed           fParNames;        // file and parameterization loadad
95   //
96   static const Double_t  fgkSol2DipZ;    // conventional Z of transition from L3 to Dipole field
97   static const UShort_t  fgkPolarityConvention; // convention for the mapping of the curr.sign on main component sign
98   //   
99   ClassDef(AliMagF, 2)           // Class for all Alice MagField wrapper for measured data + Tosca parameterization
100 };
101
102
103 #endif