Evidence of a transverse Langmuir modulational instability in a space plasma

Details Evidence of a transverse Langmuir modulational instability in a space plasma Evidence of a transverse Langmuir modulational instability in a space plasma

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1177e&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 18, July 1991, p. 1177-1180.

Physics

28

Amplitude Modulation, Auroras, Earth Ionosphere, Electrostatic Waves, Space Plasmas, Electric Fields, Electron Energy, Field Aligned Currents, Plasma Density, Plasma Waves

Scientific paper

The auroral ionosphere Langmuir-wave electric field amplitude modulation observations presented may be accounted for by a transverse modulational instability that is resonant with lower hybrid of ion Bernstein waves. In independent observations, the modulation frequencies were near the characteristic frequencies of perpendicular modes. These data strongly suggest the need for two- or three-dimensional model descriptions of nonlinear Langmuir wave evolution in the low-beta plasma.

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