Electron-acoustic_solitary_structures_in_two-electron-temperature_plasma_with_superthermal_electrons

TL;DR

This paper investigates the propagation of nonlinear electron-acoustic waves in a plasma with superthermal electrons, deriving a modified KdV equation and analyzing solitary wave solutions and their dependence on superthermal electron effects.

Contribution

It introduces a model for electron-acoustic waves in a plasma with superthermal electrons and derives a modified KdV equation to describe solitary structures.

Findings

Small amplitude electron-acoustic solitary waves are characterized.

Superthermal electrons influence the nature of the solitons.

Stationary electron-acoustic double layers are not supported by the model.

Abstract

The propagation of nonlinear electron- acoustic waves (EAWs) in an unmagnetized collision- less plasma system consisting of a cold electron fluid, superthermal hot electrons and stationary ions is investigated. A reductive perturbation method is employed to obtain a modified Korteweg-de Vries (mKdV) equa- tion for the first-order potential. The small amplitude electron-acoustic solitary wave, e.g., soliton and dou- ble layer (DL) solutions are presented, and the effects of superthermal electrons on the nature of the solitons are also discussed. But the results shows that the weak stationary EA DLs cannot be supported by the present model.