G4EqGravityField Class Reference

#include <G4EqGravityField.hh>

Inheritance diagram for G4EqGravityField:

Collaboration diagram for G4EqGravityField:

Public Member Functions
	G4EqGravityField (G4UniformGravityField *gField)
	~G4EqGravityField ()
void	SetChargeMomentumMass (G4ChargeState particleCharge, G4double MomentumXc, G4double mass)
void	EvaluateRhsGivenB (const G4double y[], const G4double Field[], G4double dydx[]) const
Public Member Functions inherited from G4EquationOfMotion
	G4EquationOfMotion (G4Field *Field)
virtual	~G4EquationOfMotion ()
virtual void	EvaluateRhsGivenB (const G4double y[], const G4double B[3], G4double dydx[]) const =0
void	RightHandSide (const G4double y[], G4double dydx[]) const
void	EvaluateRhsReturnB (const G4double y[], G4double dydx[], G4double Field[]) const
void	GetFieldValue (const G4double Point[4], G4double Field[]) const
const G4Field *	GetFieldObj () const
void	SetFieldObj (G4Field *pField)

Detailed Description

Definition at line 50 of file G4EqGravityField.hh.

Constructor & Destructor Documentation

G4EqGravityField::G4EqGravityField ( G4UniformGravityField *  gField )

inline

Definition at line 54 of file G4EqGravityField.hh.

      : G4EquationOfMotion( gField ) {;}

G4EqGravityField::~G4EqGravityField ( )

inline

Definition at line 57 of file G4EqGravityField.hh.

{;}

Member Function Documentation

void G4EqGravityField::EvaluateRhsGivenB	(	const G4double	y[],
		const G4double	Field[],
		G4double	dydx[]
	)		const

Definition at line 52 of file G4EqGravityField.cc.

{

  // Components of y:
  //    0-2 dr/ds,
  //    3-5 dp/ds - momentum derivatives

  G4double momentum_mag_square = y[3]*y[3] + y[4]*y[4] + y[5]*y[5];
  G4double inv_momentum_magnitude = 1.0 / std::sqrt( momentum_mag_square );

  G4double Energy = std::sqrt(momentum_mag_square + fMass*fMass);
  G4double cof2 = Energy/c_light;
  G4double cof1 = inv_momentum_magnitude*fMass;
  G4double inverse_velocity = Energy*inv_momentum_magnitude/c_light;

  dydx[0] = y[3]*inv_momentum_magnitude;       //  (d/ds)x = Vx/V
  dydx[1] = y[4]*inv_momentum_magnitude;       //  (d/ds)y = Vy/V
  dydx[2] = y[5]*inv_momentum_magnitude;       //  (d/ds)z = Vz/V

  dydx[3] = G[0]*cof1*cof2/c_light;
  dydx[4] = G[1]*cof1*cof2/c_light;            //  m*g
  dydx[5] = G[2]*cof1*cof2/c_light;

  // Lab Time of flight
  dydx[7] = inverse_velocity;

  return;
}

void G4EqGravityField::SetChargeMomentumMass ( G4ChargeState  particleCharge, G4double  MomentumXc, G4double  mass  )

virtual

Implements G4EquationOfMotion.

Definition at line 44 of file G4EqGravityField.cc.

{
  fMass = particleMass;
}

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The documentation for this class was generated from the following files:

• source/geant4.10.03.p02/source/geometry/magneticfield/include/G4EqGravityField.hh
• source/geant4.10.03.p02/source/geometry/magneticfield/src/G4EqGravityField.cc