Hall_parameter¶
-
plasmapy.formulary.parameters.
Hall_parameter
(n: Unit("1 / m3"), T: Unit("K"), B: Unit("T"), ion: plasmapy.particles.particle_class.Particle, particle: plasmapy.particles.particle_class.Particle, coulomb_log=None, V=None, coulomb_log_method='classical')¶ Calculate the ratio between the particle gyrofrequency and the particle-ion particle collision rate.
All parameters apply to
particle
.Aliases:
betaH_
Parameters: - n (Quantity) – The density of particle s
- T (Quantity) – The temperature of particles
- B (Quantity) – The magnetic field
- ion (Particle) – The type of ion
particle
is colliding with. - particle (Particle) – The particle of interest.
- coulomb_log (float, optional) – Preset value for the Coulomb logarithm. Used mostly for testing purposes.
- V (Quantity) – The relative velocity between
particle
and ion particles. - coulomb_log_method (str, optional) – Method used for Coulomb logarithm calculation. Refer to its documentation.
See also
plasmapy.formulary.parameters.gyrofrequency()
,plasmapy.formulary.parameters.fundamental_electron_collision_freq()
,plasmapy.formulary.collisions.Coulomb_logarithm()
Returns: Return type: astropy.units.quantity.Quantity Examples
>>> from astropy import units as u >>> Hall_parameter(1e10 * u.m**-3, 2.8e3 * u.eV, 2.3 * u.T, 'He-4 +1', 'e-') <Quantity 7.26446...e+16> >>> Hall_parameter(1e10 * u.m**-3, 5.8e3 * u.eV, 2.3 * u.T, 'He-4 +1', 'e-') <Quantity 2.11158...e+17>