Decay of electrostatic ion cyclotron waves

Details Decay of electrostatic ion cyclotron waves Decay of electrostatic ion cyclotron waves

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11...16y&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Jan. 1984, p. 16-18. Sponsorship: Deutche Forschungsgemeinschaft.

Physics

6

Auroras, Electrostatic Waves, Ion Cyclotron Radiation, Plasma Decay, Space Plasmas, Magnetohydrodynamic Waves, Nonlinear Systems

Scientific paper

It is shown that finite amplitude electrostatic ion cyclotron (EIC) waves can parametrically decay into daughter EIC waves and kinetic Alfven waves. Since the current associated with the latter is d.c. in the EIC time scale, it can linearly excite EIC waves when the amplitude of the Alfven waves is sufficiently high. This provides a mechanism for the simultaneous existence of EIC and Alfven fluctuations. Application of the theory in the auroral zone of the ionosphere is discussed.

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