Theoretical formulas for space plasma physics

default units are SI units for space plasma physics

B : magnetic field, nT
n : number density, cm^-3
T : temperature, eV

Reference

plasmapy.formulary provides theoretical formulas for calculation of physical quantities helpful for plasma physics.

np_Alfven_current

 np_Alfven_current (Alfven_speed:numpy.ndarray, density:numpy.ndarray,
                    speed_unit:astropy.units.core.Unit=Unit("km / s"),
                    n_unit:astropy.units.core.Unit=Unit("1 / cm3"),
                    current_unit:astropy.units.core.Unit=Unit("nA / m2"))

np_Alfven_speed

 np_Alfven_speed (B:numpy.ndarray, density:numpy.ndarray, ion:Union[str,in
                  t,numpy.integer,plasmapy.particles.particle_class.Partic
                  le,plasmapy.particles.particle_class.CustomParticle,astr
                  opy.units.quantity.Quantity]='p+', sign=True,
                  B_unit:astropy.units.core.Unit=Unit("nT"),
                  n_unit:astropy.units.core.Unit=Unit("1 / cm3"),
                  speed_unit:astropy.units.core.Unit=Unit("km / s"))

	Type	Default	Details
B	ndarray		magnetic field in the plasma, could be a component, as plasmapy will take `abs` of it
density	ndarray		particle density of the plasma
ion	Union	p+
sign	bool	True
B_unit	Unit	nT
n_unit	Unit	1 / cm3
speed_unit	Unit	km / s

np_inertial_length

 np_inertial_length (density:numpy.ndarray, ion:Union[str,int,numpy.intege
                     r,plasmapy.particles.particle_class.Particle,plasmapy
                     .particles.particle_class.CustomParticle,astropy.unit
                     s.quantity.Quantity]='p+',
                     n_unit:astropy.units.core.Unit=Unit("1 / cm3"),
                     length_unit:astropy.units.core.Unit=Unit("km"))

np_gradient_current

 np_gradient_current (B_gradient, speed, B_gradient_unit=Unit("nT / s"),
                      speed_unit=Unit("km / s"), current_unit=Unit("nA /
                      m2"))