A perfect magetic dipole in 3D, normal field inside 1/2 poleTipRadius. More...

#include <BDSFieldMagDipoleOuterOld.hh>

Inheritance diagram for BDSFieldMagDipoleOuterOld:

Collaboration diagram for BDSFieldMagDipoleOuterOld:

Public Member Functions
	BDSFieldMagDipoleOuterOld (const BDSMagnetStrength *strength, G4double poleTipRadius, G4double arbitraryScaling=1.0)

virtual G4ThreeVector	GetField (const G4ThreeVector &position, const double t=0) const
	Access the field value.

Public Member Functions inherited from BDSFieldMag
	BDSFieldMag ()

	BDSFieldMag (G4Transform3D transformIn)

virtual G4ThreeVector	GetField (const G4ThreeVector &position, const G4double t=0) const =0

virtual G4bool	TimeVarying () const

virtual void	GetFieldValue (const G4double point[4], G4double *field) const

virtual G4ThreeVector	GetFieldTransformed (const G4ThreeVector &position, const G4double t) const
	Get the field value after applying transform for local offset.

virtual void	SetTransform (const G4Transform3D &transformIn)

void	SetModulator (BDSModulator *modulatorIn)
	Set the optional modulator.

G4bool	FiniteStrength () const
	Accessor.

Private Attributes
G4double	poleTipRadius
	Used as radial limit for returning normal field.

G4double	normalisation
	Storage of the overal normalisation factor.

G4ThreeVector	localField
	Nominal dipole field.

G4ThreeVector	m
	Dipole moment as unit vector of field direction.

Static Private Attributes
static G4double	transitionLengthScale = 1*CLHEP::cm

Additional Inherited Members
Protected Attributes inherited from BDSFieldMag
G4bool	finiteStrength
	Flag to cache whether finite nor not.

G4Transform3D	transform
	Transform to apply for the field relative to the local coordinates of the geometry.

G4bool	transformIsNotIdentity
	Cache of whether to use transform at all.

BDSModulator *	modulator
	Optional modulator;.

Detailed Description

A perfect magetic dipole in 3D, normal field inside 1/2 poleTipRadius.

Field for the far field of a pure magnetic dipole. Inside 0.5*poleTipRadius, the nominal uniform field is returned and tanh is used as a sigmoid function to smoothly vary between the two on a length scale of transitionLengthScale, which is 1cm by default.