simulations.objects
Class MovingPointCharge

java.lang.Object
  simulations.objects.BaseObject
      simulations.objects.PointCharge
          simulations.objects.MovingPointCharge

public class MovingPointCharge

extends PointCharge

Calculates the fields of a moving point charge (extends PointCharge)

Field Summary

Vec3	a acceleration of the charge.
double	power the radial dependence of the Pauli repulsive force
Vec3	v Velocity of the charge

Fields inherited from class simulations.objects.PointCharge

m, p, q, radius

Constructor Summary

MovingPointCharge(double q, Vec3 p)
Constructor for the moving point charge.

MovingPointCharge(double q, Vec3 p, double radius)
Constructor for the moving point charge.

MovingPointCharge(double q, Vec3 p, double radius, double power)
Constructor for the moving point charge.

MovingPointCharge(double q, Vec3 p, double radius, double power, Vec3 v)
Constructor for the moving point charge.

MovingPointCharge(double q, Vec3 p, double radius, double power, Vec3 v, Vec3 a)
Constructor for the moving point charge.

MovingPointCharge(double q, Vec3 p, double radius, Vec3 v)
Constructor for the moving point charge.

MovingPointCharge(double q, Vec3 p, Vec3 v)
Constructor for the moving point charge.

MovingPointCharge(double q, Vec3 p, Vec3 v, Vec3 a)
Constructor for the moving point charge.

Method Summary

void	Acceleration(Vec3 a) Sets the acceleration
Vec3	Bfield(Vec3 x, Vec3 B) the non-relativistic magnetic field of a moving point charge (v x E )
Vec3	Efield(Vec3 x, Vec3 E) the non-relativistic electric field of a moving point charge
void	Evolve(double dt) Evolves the position and velocity of the charge.
Vec3	Pfield(Vec3 x, Vec3 P) The Pauli field of a moving point charge.
java.lang.String	toString() prints a string with the properties of the moving point charge

Methods inherited from class simulations.objects.BaseObject

Bfield, Efield, Pfield

Methods inherited from class java.lang.Object

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

Field Detail

v

public Vec3 v

Velocity of the charge

a

public Vec3 a

acceleration of the charge. Not used at present, in the future it may be used if we change this to give a relativistically correct expression for E and B ,because those expressions depend on the acceleration

power

public double power

the radial dependence of the Pauli repulsive force

Constructor Detail

MovingPointCharge

public MovingPointCharge(double q,
                         Vec3 p,
                         double radius)

Constructor for the moving point charge. Sets the acceleration and velocity to zero.

Parameters:

q - the charge

p - the position of the charge

radius - the Pauli radius of the charge

MovingPointCharge

public MovingPointCharge(double q,
                         Vec3 p,
                         double radius,
                         double power)

Constructor for the moving point charge. Sets the velocity and acceleration to zero.

Parameters:

q - the charge

p - the position of the charge

radius - the Pauli radius of the charge

power - the radial dependence of the Pauli repulsion

MovingPointCharge

public MovingPointCharge(double q,
                         Vec3 p,
                         double radius,
                         Vec3 v)

Constructor for the moving point charge. Sets the acceleration to zero.

Parameters:

q - the charge

p - the position of the charge

radius - the Pauli radius of the charge

v - the velocity of the charge

MovingPointCharge

public MovingPointCharge(double q,
                         Vec3 p,
                         double radius,
                         double power,
                         Vec3 v)

Constructor for the moving point charge. Sets the acceleration to zero.

Parameters:

q - the charge

p - the position of the charge

radius - the Pauli radius

power - the radial dependence of the Pauli repulsion

v - the velocity of the charge

MovingPointCharge

public MovingPointCharge(double q,
                         Vec3 p,
                         double radius,
                         double power,
                         Vec3 v,
                         Vec3 a)

Constructor for the moving point charge.

Parameters:

q - the charge

p - the position

radius - the radius

power - the radial dependence of the Pauli repulsion

v - the velocity of the charge

a - the acceleration of the charge

MovingPointCharge

public MovingPointCharge(double q,
                         Vec3 p)

Constructor for the moving point charge. Sets the acceleration and velocity to zero.

Parameters:

q - the charge

p - the acceleration

MovingPointCharge

public MovingPointCharge(double q,
                         Vec3 p,
                         Vec3 v)

Constructor for the moving point charge. Sets the acceleration to zero.

Parameters:

q - the charge

p - the position

v - the velocity

MovingPointCharge

public MovingPointCharge(double q,
                         Vec3 p,
                         Vec3 v,
                         Vec3 a)

Constructor for the moving point charge.

Parameters:

q - the charge

p - the position

v - the velocity

a - the acceleration

Method Detail

Evolve

public void Evolve(double dt)

Evolves the position and velocity of the charge. Very naive, should be overridden

Overrides:

Evolve in class BaseObject

Parameters:

dt - the time step for the evolution

Acceleration

public void Acceleration(Vec3 a)

Sets the acceleration

Parameters:

a - the acceleration

Efield

public Vec3 Efield(Vec3 x,
                   Vec3 E)

the non-relativistic electric field of a moving point charge

Overrides:

Efield in class PointCharge

Parameters:

x - the position of the observer

E - the electric field at the position of the observer due to the charge at p (calculated)

Returns:

E the electric field at the position of the observer due to the charge at p (calculated)

Bfield

public Vec3 Bfield(Vec3 x,
                   Vec3 B)

the non-relativistic magnetic field of a moving point charge (v x E )

Overrides:

Bfield in class PointCharge

Parameters:

x - the position of the observer

B - the magnetic field at the observer's position if the charge is at p and its velocity is v (calculated)

Returns:

B the magnetic field at the observer's position if the charge is at p and its velocity is v (calculated)

Pfield

public Vec3 Pfield(Vec3 x,
                   Vec3 P)

The Pauli field of a moving point charge. The Pauli field is returned as a multiple of the electric field of the particle.

Overrides:

Pfield in class BaseObject

Parameters:

x - the position of the observer

P - the Pauli repulsive field (calculated)

Returns:

P the Pauli repulsive field (calculated)

toString

public java.lang.String toString()

prints a string with the properties of the moving point charge

Overrides:

toString in class PointCharge