//
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//
//
// $Id$
// GEANT4 tag $Name$
//
//
// class LEMuSREqMagElectricField
//
// Class description:
//
// This is the right-hand side of equation of motion in a combined
// electric and magnetic field.

// History:
// - Created. V.Grichine, 10.11.98
// -------------------------------------------------------------------


#ifndef LEMuSREQMAGELECTRICFIELD_hh
#define LEMuSREQMAGELECTRICFIELD_hh

#include "G4EquationOfMotion.hh"
#include "G4ElectroMagneticField.hh"

class LEMuSREqMagElectricField : public G4EquationOfMotion
{
  public:  // with description

    LEMuSREqMagElectricField(G4ElectroMagneticField *emField )
      : G4EquationOfMotion( emField ) {;}

    ~LEMuSREqMagElectricField() {;}

    void  SetChargeMomentumMass(G4double particleCharge, // in e+ units
                                G4double MomentumXc,
                                G4double mass);

    void EvaluateRhsGivenB(const G4double y[],
                           const G4double Field[],
                                 G4double dydx[] ) const;
      // Given the value of the electromagnetic field, this function
      // calculates the value of the derivative dydx.

  private:

    G4double        fElectroMagCof ;
    G4double        fMassCof;

  G4double omegac;
  G4double anomaly;
  G4double ParticleCharge;

  G4double E;
  G4double gamma;
  G4double beta;  



};

#endif
