simulations.objects
Class ElectricDipoleRotating

java.lang.Object
  simulations.objects.BaseObject
      simulations.objects.ElectricDipoleRotating

public class ElectricDipoleRotating

extends BaseObject

This is a rotating electric dipole. It rotates about the z axis, lies in the xy plane Important note: we multiply the overall electric field of this dipole by one factor of the radius and scale it by 1/100. If you want this dipole to interact with other electromagnetic objects you must compensate for this.

Version:

1.0

Author:

Andreas Sunquist, John Belcher

Field Summary

double	omega The angular frequency of rotation of the rotating dipole
double	p0 The magnitude of the dipole moment of the rotating dipole
double	t The time.
double	theta The angle that the dipole moment mades to the z-axis
Vec3	x The position of the dipole.

Constructor Summary

ElectricDipoleRotating(Vec3 x, double p0, double omega, double theta)
Create an electric dipole

Method Summary

Vec3	Bfield(Vec3 x, Vec3 B) Compute the magnetic field at position x and time t
Vec3	Efield(Vec3 x, Vec3 E) Compute the electric field at position x and time t
void	Evolve(double dt) Evolve the dipole time
Vec3	getDDP(double dt) Returns the second time derivative of the dipole moment at a time retarded by dt.
Vec3	getDP(double dt) Returns the first time derivative of the dipole moment at a time retarded by dt We use the method getT to find out the current time of the dipole
Vec3	getP(double dt) Returns the dipole moment at a time retarded by dt.
double	getT() Get the time.

Methods inherited from class simulations.objects.BaseObject

Bfield, Efield, Pfield, Pfield

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

x

public Vec3 x

The position of the dipole.

t

public double t

The time.

p0

public double p0

The magnitude of the dipole moment of the rotating dipole

omega

public double omega

The angular frequency of rotation of the rotating dipole

theta

public double theta

The angle that the dipole moment mades to the z-axis

Constructor Detail

ElectricDipoleRotating

public ElectricDipoleRotating(Vec3 x,
                              double p0,
                              double omega,
                              double theta)

Create an electric dipole

Method Detail

getT

public double getT()

Get the time. This allows us the find the current time for this dipole.

getP

public Vec3 getP(double dt)

Returns the dipole moment at a time retarded by dt. We use the method getT to find out the current time of the dipole

getDP

public Vec3 getDP(double dt)

Returns the first time derivative of the dipole moment at a time retarded by dt We use the method getT to find out the current time of the dipole

getDDP

public Vec3 getDDP(double dt)

Returns the second time derivative of the dipole moment at a time retarded by dt. We use the method getT to find out the current time of the dipole

Evolve

public void Evolve(double dt)

Evolve the dipole time

Overrides:

Evolve in class BaseObject

Parameters:

dt - the time step

Efield

public Vec3 Efield(Vec3 x,
                   Vec3 E)

Compute the electric field at position x and time t

Specified by:

Efield in class BaseObject

Parameters:

x - the position of the observer

E - the electric field at the observer's position

Returns:

E the electric field at the observer's position

Bfield

public Vec3 Bfield(Vec3 x,
                   Vec3 B)

Compute the magnetic field at position x and time t

Specified by:

Bfield in class BaseObject

Parameters:

B - the magnetic field at the observer's position

Returns:

B the magnetic field at the observer's position