G4EqGravityField Class Reference

#include <G4EqGravityField.hh>

Inheritance diagram for G4EqGravityField:

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

Private Attributes
G4double	fMass = 0.0
G4Field *	itsField = nullptr

Detailed Description

Definition at line 42 of file G4EqGravityField.hh.

Constructor & Destructor Documentation

G4EqGravityField()

G4EqGravityField::G4EqGravityField

(

G4UniformGravityField *

gField

)

Definition at line 39 of file G4EqGravityField.cc.

  : G4EquationOfMotion( gField )
{
}

~G4EqGravityField()

G4EqGravityField::~G4EqGravityField

(

)

Definition at line 44 of file G4EqGravityField.cc.

{
}

Member Function Documentation

EvaluateRhsGivenB() [1/2]

virtual void G4EquationOfMotion::EvaluateRhsGivenB ( const G4double  y[], const G4double  B[3], G4double  dydx[]  ) const

pure virtualinherited

Implemented in G4ErrorMag_UsualEqRhs, G4Mag_SpinEqRhs, G4Mag_UsualEqRhs, G4KM_NucleonEqRhs, G4KM_OpticalEqRhs, and G4Mag_EqRhs.

Referenced by G4RKG3_Stepper::StepNoErr(), and G4RKG3_Stepper::Stepper().

EvaluateRhsGivenB() [2/2]

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

Definition at line 57 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;
}

References source.hepunit::c_light, and fMass.

EvaluateRhsReturnB()

void G4EquationOfMotion::EvaluateRhsReturnB ( const G4double  y[], G4double  dydx[], G4double  Field[]  ) const

inlineinherited

Referenced by G4RKG3_Stepper::StepNoErr().

GetFieldObj() [1/2]

G4Field * G4EquationOfMotion::GetFieldObj ( )

inlineinherited

GetFieldObj() [2/2]

const G4Field * G4EquationOfMotion::GetFieldObj ( ) const

inlineinherited

Referenced by G4NystromRK4::GetField().

GetFieldValue()

void G4EquationOfMotion::GetFieldValue ( const G4double  Point[4], G4double  Field[]  ) const

inlineinherited

Referenced by G4BFieldIntegrationDriver::GetFieldValue(), and G4MultiLevelLocator::ReportFieldValue().

RightHandSide()

void G4EquationOfMotion::RightHandSide ( const G4double  y[], G4double  dydx[]  ) const

inlineinherited

Referenced by G4ModifiedMidpoint::DoStep(), and G4VFSALIntegrationStepper::RightHandSide().

SetChargeMomentumMass()

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

virtual

Implements G4EquationOfMotion.

Definition at line 49 of file G4EqGravityField.cc.

{
  fMass = particleMass;
}

References fMass.

SetFieldObj()

void G4EquationOfMotion::SetFieldObj ( G4Field *  pField )

inlineinherited

Referenced by G4FieldManager::SetDetectorField(), and G4NystromRK4::SetDistanceForConstantField().

Field Documentation

fMass

G4double G4EqGravityField::fMass = 0.0

private

Definition at line 62 of file G4EqGravityField.hh.

Referenced by EvaluateRhsGivenB(), and SetChargeMomentumMass().

itsField

G4Field* G4EquationOfMotion::itsField = nullptr

privateinherited

Definition at line 90 of file G4EquationOfMotion.hh.

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

• source/geometry/magneticfield/include/G4EqGravityField.hh
• source/geometry/magneticfield/src/G4EqGravityField.cc