G4QuadrupoleMagField Class Reference

#include <G4QuadrupoleMagField.hh>

Inheritance diagram for G4QuadrupoleMagField:

Collaboration diagram for G4QuadrupoleMagField:

Public Member Functions
	G4QuadrupoleMagField (G4double pGradient)
	G4QuadrupoleMagField (G4double pGradient, G4ThreeVector pOrigin, G4RotationMatrix *pMatrix)
	~G4QuadrupoleMagField ()
void	GetFieldValue (const G4double yTrack[], G4double B[]) const
G4Field *	Clone () const
Public Member Functions inherited from G4MagneticField
	G4MagneticField ()
virtual	~G4MagneticField ()
	G4MagneticField (const G4MagneticField &r)
G4MagneticField &	operator= (const G4MagneticField &p)
G4bool	DoesFieldChangeEnergy () const
virtual void	GetFieldValue (const G4double Point[4], G4double *Bfield) const =0
Public Member Functions inherited from G4ElectroMagneticField
	G4ElectroMagneticField ()
virtual	~G4ElectroMagneticField ()
	G4ElectroMagneticField (const G4ElectroMagneticField &r)
G4ElectroMagneticField &	operator= (const G4ElectroMagneticField &p)
Public Member Functions inherited from G4Field
	G4Field (G4bool gravityOn=false)
	G4Field (const G4Field &)
virtual	~G4Field ()
G4Field &	operator= (const G4Field &p)
G4bool	IsGravityActive () const
void	SetGravityActive (G4bool OnOffFlag)

Detailed Description

Definition at line 54 of file G4QuadrupoleMagField.hh.

Constructor & Destructor Documentation

G4QuadrupoleMagField::G4QuadrupoleMagField

(

G4double

pGradient

)

Definition at line 36 of file G4QuadrupoleMagField.cc.

{
   fGradient = pGradient ;
   fOrigin   = G4ThreeVector( 0.0, 0.0, 0.0) ;
   fpMatrix  = &IdentityMatrix;
}

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G4QuadrupoleMagField::G4QuadrupoleMagField	(	G4double	pGradient,
		G4ThreeVector	pOrigin,
		G4RotationMatrix *	pMatrix
	)

Definition at line 46 of file G4QuadrupoleMagField.cc.

{
   fGradient    = pGradient ;
   fOrigin      = pOrigin ;
   fpMatrix     = pMatrix ;
}

G4QuadrupoleMagField::~G4QuadrupoleMagField

(

)

Definition at line 62 of file G4QuadrupoleMagField.cc.

{
}

Member Function Documentation

G4Field * G4QuadrupoleMagField::Clone ( ) const

virtual

Reimplemented from G4Field.

Definition at line 55 of file G4QuadrupoleMagField.cc.

{
    return new G4QuadrupoleMagField(fGradient, fOrigin, fpMatrix);
}

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void G4QuadrupoleMagField::GetFieldValue	(	const G4double	yTrack[],
		G4double	B[]
	)		const

Definition at line 70 of file G4QuadrupoleMagField.cc.

{
   G4ThreeVector r_global = G4ThreeVector(
        y[0] - fOrigin.x(), 
        y[1] - fOrigin.y(), 
        y[2] - fOrigin.z());

   G4ThreeVector r_local = G4ThreeVector(
           fpMatrix->colX() * r_global,
           fpMatrix->colY() * r_global,
           fpMatrix->colZ() * r_global);

   G4ThreeVector B_local = G4ThreeVector(
           fGradient * r_local.y(),
        fGradient * r_local.x(),
        0);

   G4ThreeVector B_global = G4ThreeVector(
           fpMatrix->inverse().rowX() * B_local,
           fpMatrix->inverse().rowY() * B_local,
           fpMatrix->inverse().rowZ() * B_local);

   B[0] = B_global.x() ;
   B[1] = B_global.y() ;
   B[2] = B_global.z() ;
}

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

• geant4.10.03.p01/source/geometry/magneticfield/include/G4QuadrupoleMagField.hh
• geant4.10.03.p01/source/geometry/magneticfield/src/G4QuadrupoleMagField.cc