Growth rate and gain of stimulated Brillouin scattering considering nonlinear Landau damping due to particle trapping

TL;DR

This paper develops a model for stimulated Brillouin scattering that incorporates nonlinear Landau damping due to particle trapping, improving the accuracy of reflectivity predictions in laser-plasma interactions.

Contribution

It introduces a modified growth rate and gain model for SBS considering particle trapping effects, aligning simulation data more closely with the Tang model.

Findings

Reduced Landau damping enhances SBS gain predictions.

The model improves agreement between simulation and theoretical predictions.

Applicable to parametric instability analysis in laser-plasma interactions.

Abstract

Growth rate and gain of SBS considering the reduced Landau damping due to particle trapping has been proposed to predict the growth and average level of SBS reflectivity. Due to particle trapping, the reduced Landau damping has been taken used of to calculate the gain of SBS, which will make the simulation data of SBS average reflectivity be consistent to the Tang model better. This work will solve the pending questions in laser-plasma interaction and have wide applications in parametric instabilities.