include/Geant4/G4SextupoleMagField.hh

0001 //
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0025 //
0026 // Class description:
0027 //
0028 // Sextupole magnetic field
0029 //   fGradient - is the gradient value for a sextupole magnet
0030 //   the magnetic field components are:
0031 //   Bx = B[0] = fGradient*X*Y,
0032 //   By = B[1] = fGradient*(X*X-Y*Y)/2,
0033 //   Bz = B[2] = 0
0034
0035 // Author: H. Burkhardt - 23/10/2019
0036 // -------------------------------------------------------------------
0037 #ifndef G4SEXTUPOLEMAGFIELD_HH
0038 #define G4SEXTUPOLEMAGFIELD_HH
0039
0040 #include "G4MagneticField.hh"
0041 #include "G4ThreeVector.hh"
0042 #include "G4RotationMatrix.hh"
0043
0044 class G4SextupoleMagField : public G4MagneticField
0045 {
0046   public:
0047
0048     G4SextupoleMagField(G4double pGradient);
0049     G4SextupoleMagField(      G4double pGradient,
0050                         const G4ThreeVector& pOrigin,
0051                         G4RotationMatrix* pMatrix);
0052    ~G4SextupoleMagField() override;
0053
0054     void GetFieldValue(const G4double yTrack[], G4double B[] ) const override;
0055     G4Field* Clone() const override;
0056
0057   private:
0058
0059     G4double          fGradient = 0.0;
0060     G4ThreeVector     fOrigin   = G4ThreeVector(0.0, 0.0, 0.0);
0061     G4RotationMatrix* fpMatrix  = nullptr;
0062 };
0063
0064 #endif