function to evaluate a bimaxwellian momentum distribution

bimaxwellian_func(p_perp, p_par, n, p_tperp, p_tpar, p_drift)

Arguments

p_perp

numeric value of perpendicular momentum component

p_par

numeric value of parallel momentum component

n

numeric particle density.

p_tperp

numeric themal momentum perpendicular to magnetic field

p_tpar

numeric themal momentum parallel to magnetic field

p_drift

numeric drift momentum parallel to magnetic field

Value

numeric value of momentum distribution at (p_perp, p_par)