Dispersion and damping of ion-acoustic waves in the plasma with a regularized kappa-distribution

TL;DR

This paper investigates how ion-acoustic wave dispersion and damping are affected by a regularized kappa-distribution in plasma, deriving new relations and analyzing parameter impacts on wave behavior.

Contribution

It introduces a generalized dispersion relation and damping rate for ion-acoustic waves considering a regularized kappa-distribution, highlighting parameter effects.

Findings

Wave frequency and damping rate are generally reduced compared to standard kappa-distribution.

Ion-acoustic waves and damping rates exist under certain kappa thresholds.

Numerical analysis confirms the significant influence of alpha and kappa parameters.

Abstract

The dispersion and damping of ion-acoustic waves in the plasma with a regularized kappa-distribution are studied. The generalized dispersion relation and damping rate are derived, which both depend significantly on the parameters alpha and kappa. The numerical analyses show that the wave frequency and the damping rate of ion-acoustic waves in the plasma with the regularized kappa-distribution are both generally less than those in the plasma with the kappa-distribution, and if kappa is less than a value, the ion-acoustic waves and their damping rate exist in the plasma with the regularized kappa-distribution.