# Suprathermal Electrons from the Anti-Stokes Langmuir Decay Instability Cascade

## TL;DR

This paper investigates a new electron acceleration mechanism via the anti-Stokes Langmuir decay instability cascade, explaining the generation of suprathermal electrons in plasma relevant to inertial confinement fusion and potential X-ray source development.

## Contribution

It introduces and analyzes a novel electron acceleration process through the anti-Stokes Langmuir decay instability cascade, expanding understanding of plasma instabilities and energetic electron production.

## Key findings

- Anomalous hot electrons above 100 keV are generated in specific plasma conditions.
- The anti-Stokes Langmuir decay instability cascade explains energetic electron production.
- Potential applications include mitigation in fusion experiments and development of X-ray sources.

## Abstract

The study of parametric instabilities has played a crucial role in understanding energy transfer to plasma and, with that, the development of key applications such as inertial confinement fusion. When the densities are between $0.108n_c\lesssim n_e\lesssim 0.138n_c$ and the electron temperature is $T_e=$2.5 keV, anomalous hot electrons with kinetic energies above 100 keV are generated. Here, a new electron acceleration mechanism - the anti-Stokes Langmuir decay instability cascade of forward stimulated Raman scattering - is investigated. This mechanism not only explains anomalous energetic electron generation in indirectly driven inertial confinement fusion experiments (and, with that, future mitigation strategies for experiments on the National Ignition Facility), it also provides a new way of accelerating electrons to higher energy for applications such as novel X-ray sources.