Strongly Enhanced Stimulated Brillouin Backscattering in an Electron-Positron Plasma
Plasma Physics
2016-01-13 v2
Abstract
Stimulated Brillouin backscattering of light is shown to be drastically enhanced in electron-positron plasmas, in contrast to the suppression of stimulated Raman scattering. A generalized theory of three-wave coupling between electromagnetic and plasma waves in two-species plasmas with arbitrary mass ratios, confirmed with a comprehensive set of particle-in-cell simulations, reveals violations of commonly-held assumptions about the behavior of electron-positron plasmas. Specifically, in the electron-positron limit three-wave parametric interaction between light and the plasma acoustic wave can occur, and the acoustic wave phase velocity differs from its usually assumed value.
Keywords
Cite
@article{arxiv.1512.00744,
title = {Strongly Enhanced Stimulated Brillouin Backscattering in an Electron-Positron Plasma},
author = {Matthew R. Edwards and Nathaniel J. Fisch and Julia M. Mikhailova},
journal= {arXiv preprint arXiv:1512.00744},
year = {2016}
}
Comments
11 pages, 5 figures