The diffusion of charged particles in the weakly ionized plasma with power-law kappa-distributions

TL;DR

This paper derives new expressions for the diffusion and mobility coefficients of charged particles in weakly ionized plasma with power-law kappa-distributions, showing their dependence on kappa-parameters and reducing to classical forms for Maxwellian distributions.

Contribution

It provides novel analytical formulas for transport coefficients in plasma with non-Maxwellian distributions, highlighting the impact of kappa-parameters.

Findings

Transport coefficients depend strongly on kappa-parameters.

Formulas reduce to classical Maxwellian results when kappa approaches infinity.

Electrons and ions have different kappa-parameters, affecting diffusion behavior.

Abstract

We study the diffusion of charged particles in the weakly ionized plasma with the power-law kappa-distributions and without magnetic field. The electrons and ions have different kappa-parameters. We obtain the expressions of both diffusion and mobility coefficients of electrons and ions respectively in the plasma. We find that these new transport coefficient formulae depend strongly on the kappa-parameters in the power-law distributed plasma. When we take kappa to be infinite, these formulae reduce to the classical forms in the weakly ionized plasma with a Maxwellian distribution.