# Scattering of electron holes in the context of ion-acoustic regime

## TL;DR

This paper investigates how electron holes scatter during ion-acoustic solitary wave collisions using kinetic simulations, revealing that trapped electron populations influence scattering at low velocities but not at high velocities.

## Contribution

It introduces a detailed kinetic simulation analysis of electron hole scattering in ion-acoustic regimes, emphasizing the role of trapped electron populations at different velocities.

## Key findings

- Electron holes scatter at low relative velocities due to trapped electron repulsion.
- High relative velocities diminish the impact of trapped populations on scattering.
- Trapped electron populations cause scattering only in low-velocity collisions.

## Abstract

Mutual collisions between ion-acoustic (IA) solitary waves are studied based on a fully kinetic simulation approach. Two cases, small and large relative velocity, are studied and the effect of trapped electron population on the collision process are focused upon. It is shown that, for the case of small relative velocity, the repelling force between the trapped populations of electrons results in scattering of electron holes. However, this phenomenon can not be witnessed if the relative velocity is considerably high, since the impact of trapped population stays very weak.