Strongly Enhanced Stimulated Brillouin Backscattering in an Electron-Positron Plasma
arXiv:1512.00744 · doi:10.1103/PhysRevLett.116.015004
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.
11 pages, 5 figures
References in corpus (3)
Cited by in corpus (14)
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