A self-consistent theory of MHD parametric instabilities driven by a standing Alfven wave in the planetary magnetosphere.

Details A self-consistent theory of MHD parametric instabilities driven by a standing Alfven wave in the planetary magnetosphere. A self-consistent theory of MHD parametric instabilities driven by a standing Alfven wave in the planetary magnetosphere.

May 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...309..673c&link_type=abstract

Astronomy and Astrophysics, v.309, p.673-676

Astronomy and Astrophysics

Astrophysics

1

Magnetohydrodynamics(Mhd), Plasmas, Instabilities, Earth, Planets And Satellites: General

Scientific paper

A finite-amplitude standing Alfven wave of circular polarization can excite MHD parametric instabilities in a low-β plasma. In the presence of a standing Alfven pump wave, two independent gratings associated with the density fluctuations are generated. The role of the second grating in the convective and purely growing instabilities is elucidated. The intense auroral Alfven-acoustic events observed in the planetary magnetosphere provide good experimental evidence in support of the Alfven parametric instabilities.

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