$\omega_{ce} = \frac{eB}{m_e}$ | $\delta_{p} = \frac{c}{\omega_{pe}}$ | $\delta_{cl} = \sqrt{\frac{2}{\mu_0 \sigma \omega}}$ | $\lambda_{D} = \sqrt{\frac{\epsilon_0 k_B T_e}{n_e e^2}}$ | $\nu_{en} = n_g \sigma v_{te}$