include/Geant4/G4EqMagElectricField.hh

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0025 //
0026 // G4EqMagElectricField
0027 //
0028 // Class description:
0029 //
0030 // This is the right-hand side of equation of motion in a combined
0031 // electric and magnetic field.
0032
0033 // Author: Vladimir Grichine (CERN), 10.11.1998
0034 // -------------------------------------------------------------------
0035 #ifndef G4EQMAGELECTRICFIELD_HH
0036 #define G4EQMAGELECTRICFIELD_HH
0037
0038 #include "G4ChargeState.hh"
0039 #include "G4EquationOfMotion.hh"
0040 #include "G4ElectroMagneticField.hh"
0041
0042 /**
0043  * @brief G4EqMagElectricField implements the right-hand side of equation of
0044  * motion in a combined electric and magnetic field.
0045  */
0046
0047 class G4EqMagElectricField : public G4EquationOfMotion
0048 {
0049   public:
0050
0051     /**
0052      * Constructor for G4EqMagElectricField.
0053      *  @param[in] emField Pointer to the electromagnetic field.
0054      */
0055     G4EqMagElectricField(G4ElectroMagneticField* emField );
0056
0057     /**
0058      * Default Destructor.
0059      */
0060     ~G4EqMagElectricField() override = default;
0061
0062     /**
0063      * Sets the charge, momentum and mass of the current particle.
0064      * Used to set the equation's coefficients.
0065      *  @param[in] particleCharge Magnetic charge and moments in e+ units.
0066      *  @param[in] MomentumXc Particle momentum.
0067      *  @param[in] mass Particle mass.
0068      */
0069     void  SetChargeMomentumMass(G4ChargeState particleCharge, // in e+ units
0070                                 G4double MomentumXc,
0071                                 G4double mass) override;
0072
0073     /**
0074      * Calculates the value of the derivative, given the value of the
0075      * electromagnetic field.
0076      *  @param[in] y Coefficients array.
0077      *  @param[in] Field Field value.
0078      *  @param[out] dydx Derivatives array.
0079      */
0080     void EvaluateRhsGivenB(const G4double y[],
0081                            const G4double Field[],
0082                                  G4double dydx[] ) const override;
0083
0084     /**
0085      * Returns the equation type-ID, "kEqElectroMagnetic".
0086      */
0087     inline G4EquationType GetEquationType() const override { return kEqElectroMagnetic; }
0088
0089   private:
0090
0091     G4double fElectroMagCof = 0.0;
0092     G4double fMassCof = 0.0;
0093 };
0094
0095 #endif