Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/geometry/magneticfield/include/G4SextupoleMagField.hh

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  1 //
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  3 // * License and Disclaimer                                           *
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 17 // *                                                                  *
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 25 //
 26 // Class description:
 27 //
 28 // Sextupole magnetic field
 29 //   fGradient - is the gradient value for a sextupole magnet
 30 //   the magnetic field components are:
 31 //   Bx = B[0] = fGradient*X*Y,
 32 //   By = B[1] = fGradient*(X*X-Y*Y)/2,
 33 //   Bz = B[2] = 0
 34 
 35 // Author: H. Burkhardt - 23/10/2019
 36 // -------------------------------------------------------------------
 37 #ifndef G4SEXTUPOLEMAGFIELD_HH
 38 #define G4SEXTUPOLEMAGFIELD_HH
 39 
 40 #include "G4MagneticField.hh"
 41 #include "G4ThreeVector.hh"
 42 #include "G4RotationMatrix.hh"
 43 
 44 class G4SextupoleMagField : public G4MagneticField
 45 {
 46   public:
 47 
 48     G4SextupoleMagField(G4double pGradient);
 49     G4SextupoleMagField(      G4double pGradient,
 50                         const G4ThreeVector& pOrigin,
 51                         G4RotationMatrix* pMatrix);
 52    ~G4SextupoleMagField() override;
 53 
 54     void GetFieldValue(const G4double yTrack[], G4double B[] ) const override;
 55     G4Field* Clone() const override;
 56 
 57   private:
 58 
 59     G4double          fGradient = 0.0;
 60     G4ThreeVector     fOrigin   = G4ThreeVector(0.0, 0.0, 0.0);
 61     G4RotationMatrix* fpMatrix  = nullptr;
 62 };
 63 
 64 #endif
 65