Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/geometry/magneticfield/include/G4Mag_SpinEqRhs.hh

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  1 //
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 25 //
 26 // G4Mag_SpinEqRhs
 27 //
 28 // Class description:
 29 //
 30 // This is the equation of motion for a particle with spin in a pure
 31 // magnetic field. The three components of the particle's spin are
 32 // treated utilising BMT equation.
 33 
 34 // Created: J.Apostolakis, P.Gumplinger - 08.02.1999
 35 // --------------------------------------------------------------------
 36 #ifndef G4MAG_SPIN_EQRHS_HH
 37 #define G4MAG_SPIN_EQRHS_HH
 38 
 39 #include "G4Types.hh"
 40 #include "G4Mag_EqRhs.hh"
 41 #include "G4ChargeState.hh"
 42 
 43 class G4MagneticField;
 44 
 45 class G4Mag_SpinEqRhs : public G4Mag_EqRhs
 46 {
 47    public:
 48 
 49      G4Mag_SpinEqRhs( G4MagneticField* MagField );
 50     ~G4Mag_SpinEqRhs() override;
 51        // Constructor and destructor. No actions.
 52 
 53      void SetChargeMomentumMass(G4ChargeState particleCharge,
 54                                 G4double MomentumXc,
 55                                 G4double mass) override; 
 56 
 57      void EvaluateRhsGivenB( const  G4double y[],
 58                              const  G4double B[3],
 59                                     G4double dydx[] ) const override;
 60        // Given the value of the magnetic field B, this function 
 61        // calculates the value of the derivative dydx.
 62 
 63      inline void SetAnomaly(G4double a) { anomaly = a; }
 64      inline G4double GetAnomaly() const { return anomaly; }
 65        // set/get magnetic anomaly
 66 
 67    private:
 68 
 69      G4double charge=0.0, mass=0.0, magMoment=0.0, spin=0.0;
 70      G4double omegac=0.0, anomaly=0.0011659208;
 71      G4double beta=0.0, gamma=0.0;
 72 };
 73 
 74 #endif
 75