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Parametric instabilities below the electron plasma frequency due to relativistic corrections

A. Bourdier, G. Di Bona, X. Fortin, C. Masselot

Abstract

We present a model which describes the interaction of a cold homogeneous plasma with a strong linearly polarized external electromagnetic wave, taking into account relativistic terms. Instabilities appear for transverse and longitudinal waves when the pump-field frequency is at the same time below the electron plasma frequency and above but very near the cutoff frequency obtained by Kaw and Dawson with a nonlinear relativistic theory.

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Key concepts: Physics, Plasma, Electron, Quantum electrodynamics, Atomic physics, Electromagnetic electron wave, Electromagnetic radiation, Transverse plane