# Dynamics of electron beams in the inhomogeneous solar corona plasma

## TL;DR

This paper models how electron beams in the inhomogeneous solar corona evolve, showing they slow down and generate Langmuir waves, which explains observed features of type III solar radio bursts.

## Contribution

It provides a numerical analysis of electron beam dynamics in inhomogeneous plasma, linking theoretical predictions with solar radio burst observations.

## Key findings

- Electron beams propagate with decreasing velocity in inhomogeneous plasma.
- Langmuir waves accompany the beam and carry away energy.
- Deceleration of type III bursts is explained by corona inhomogeneity.

## Abstract

Dynamics of an spatially limited electron beam in the inhomogeneous solar corona plasma is considered in the framework of weak turbulence theory when the temperature of the beam significantly exceeds that of surrounding plasma. The numerical solution of kinetic equations manifests that generally the beam accompanied by Langmuir waves propagates as a beam-plasma structure with a decreasing velocity. Unlike the uniform plasma case the structure propagates with the energy losses in the form of Langmuir waves. The results obtained are compared with the results of observations of type III bursts. It is shown that the deceleration of type III sources can be explained by the corona inhomogeneity. The frequency drift rates of the type III sources are found in a good agreement with the numerical results of beam dynamics.