species

Parallel Temperature Ratio. $T_{ref}/T_{s}|_{\parallel}$

Mass Ratio. $m_{ref}/m_{s}$

Temperature Anisotropy. $T_{\perp}/T_{\parallel}_s$

Relative charge ratio. $q_{ref}/q_{s}$

Density Ratio. $n_{s}/n_{ref}$

Relative Drift, normalized to reference Alfven velocity $v_{drift}/v_{A,ref}$ with $v_{A,ref} = B/\sqrt{4 \pi n_{ref} m_{ref}}$.