Electron-acoustic solitons in an electron-beam plasma system with kappa-distributed electrons

TL;DR

This paper studies the conditions and properties of electron-acoustic solitary waves in a plasma with an electron beam, cold electrons, and hot suprathermal electrons modeled by a kappa distribution, revealing how parameters affect soliton existence.

Contribution

It introduces a detailed analysis of electron-acoustic solitons in a complex plasma with kappa-distributed electrons and electron beam effects, expanding understanding of plasma wave dynamics.

Findings

Soliton existence domain narrows with increased suprathermality of hot electrons.

Higher beam speed reduces the soliton existence domain.

Decreasing the beam-to-cold electron ratio also narrows the existence domain.

Abstract

We investigate the existence conditions and propagation properties of electron-acoustic solitary waves in a plasma consisting of an electron beam fluid, a cold electron fluid, and a hot suprathermal electron component modeled by a $\kappa$-distribution function. The Sagdeev pseudopotential method was used to investigate the occurrence of stationary-profile solitary waves. We have determined how the soliton characteristics depend on the electron beam parameters. It is found that the existence domain for solitons becomes narrower with an increase in the suprathermality of hot electrons, increasing the beam speed, and decreasing the beam-to-cold electron population ratio.