# CustomParticle¶

class plasmapy.particles.CustomParticle(mass: Unit("kg") = None, charge: (Unit("C"), <class 'numbers.Real'>) = None)

A class to represent custom particles.

Example use cases for this class include representing an average ion in a multi-component plasma, molecules, or dust grains.

Parameters: mass (Quantity, optional) – The mass of the custom particle in units of mass. charge (Quantity or Real) – The electric charge of the custom particle. If provided as a Quantity, then it must be in units of electric charge. If provided as a real number, then it is treated as the ratio of the charge to the elementary charge. InvalidParticleError – If the charge or mass provided is invalid so that the custom particle cannot be created.

~plasmapy.particles.Particle ~plasmapy.particles.DimensionlessParticle

Notes

If the charge or mass is not specified, then the corresponding value will be set to numpy.nan in the appropriate units.

Examples

>>> from astropy import units as u
>>> from plasmapy.particles import CustomParticle
>>> custom_particle = CustomParticle(mass=1.5e-26 * u.kg, charge=-1)
>>> custom_particle.mass
<Quantity 1.5e-26 kg>
>>> custom_particle.charge
<Quantity -1.60217...e-19 C>


Attributes Summary

 charge Return the custom particle’s electric charge in coulombs. mass Return the custom particle’s mass.

Attributes Documentation

charge

Return the custom particle’s electric charge in coulombs.

mass

Return the custom particle’s mass.