Space Pyhsics Course

Alfven Velocity	$V = \frac{Magnetic Field}{\sqrt{Magnetic constant . Number density . Ion mass}} = \frac{B}{\sqrt{μ . ρ . m}}$
Debye Lenght	$λ = \sqrt{\frac{VacuumPermittivity . BoltzmannConst . Temperature}{NumberDensity .{ElementaryCharge}^{2}}} = \sqrt{\frac{ε . k . T}{μ .e^{2}}}$
Gyroradius	$r_{c} = \frac{Ion mass . Bulk velocity}{ElementaryCharge. MagneticField} = \frac{m . V}{e . B}$
Electron Plasma Frequency (Quasi-neutrality)	$ω_{pe} = \sqrt{\frac{NumberDensity .{ElementaryCharge}^{2}}{VacuumPermittivity . Ion Mass}} = \sqrt{\frac{ρ .e^{2}}{ε . m}}$
Angular Frequency	$ω_{ci} = \frac{ElementaryCharge . MagneticField}{Ion Mass} = \frac{e . B}{m}$
Gyrotime	$T_{ci} = \frac{2 . π}{ω_{ci}}$
Electron Thermal Velocity	$V_{T} = \sqrt{\frac{2. BoltzmannConst . Temperature}{Ion Mass}} = \sqrt{\frac{2. k . T}{m}}$