# X-Ray Amplification by Stimulated Brillouin Scattering

## TL;DR

This paper explores plasma-based x-ray amplification via stimulated Brillouin scattering, predicting it can produce ultra-intense, ultra-short x-ray pulses surpassing current sources, with potential for significant advancements in laser technology.

## Contribution

It introduces a novel approach using stimulated Brillouin scattering for x-ray amplification, demonstrating its advantages over Raman amplification in the high-energy regime.

## Key findings

- Analytic predictions support feasibility of Brillouin x-ray amplification.
- Numerical and particle-in-cell simulations show potential for pulse compression.
- Predicted intensities exceed current x-ray sources by orders of magnitude.

## Abstract

Plasma-based parametric amplification using stimulated Brillouin scattering offers a route to coherent x-ray pulses orders-of-magnitude more intense than those of the brightest available sources. Brillouin amplification permits amplification of shorter wavelengths with lower pump intensities than Raman amplification, which Landau and collisional damping limit in the x-ray regime. Analytic predictions, numerical solutions of the three-wave coupling equations, and particle-in-cell simulations suggest that Brillouin amplification in solid-density plasmas will allow compression of current x-ray free electron laser pulses to sub-femtosecond durations and unprecedented intensities.