Application of the three-temperatue theory of gaseous ion transport

The three-temperature theory of gaseous ion transport is generalized to allow arbitrary choices for the parallel and perpendicular ion temperatures and the velocity displacement. A truncation-parametrization sheme is proposed which simplifies the numerical computation. Results obtained in this way compare favorably with exact and Monte Carlo results available for special cases. Finally, the theory is used to test a proposed interaction potential for Cs⁺-Ar by comparison of calculated and measured mobility and diffusion coefficients.