Strongly Enhanced Stimulated Brillouin Backscattering in an Electron-Positron Plasma

Autor:	Edwards, Matthew R., Fisch, Nathaniel J., Mikhailova, Julia M.
Rok vydání:	2015
Předmět:	Physics - Plasma Physics
Zdroj:	Phys. Rev. Lett. 116, 015004 (2016)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.116.015004
Popis:	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. Comment: 11 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1512.00744 Zobrazit plný text záznamu View this record from Arxiv