Abstract
This paper presents a brief report on properties of the parametric decay, modulational, filamentation and magnetoacoustic instabilities of a large amplitude, circularly polarized Alfvén wave. We allow the daughter and sideband waves to propagate at an arbitrary angle to the background magnetic field so that the electrostatic and electromagnetic characteristics of these waves are coupled. We investigate the dependance of these instabilities on dispersion, plasma β, pump wave amplitude and propagation angle. Analytical and numerical results are compared with numerical simulations to investigate the full nonlinear evolution of these instabilities.
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