Decay of electrostatic hydrogen cyclotron waves into ion acoustic modes in auroral field lines

Details Decay of electrostatic hydrogen cyclotron waves into ion acoustic modes in auroral field lines Decay of electrostatic hydrogen cyclotron waves into ion acoustic modes in auroral field lines

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.2495b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, March 1, 1987, p. 2495-2504.

Physics

5

Auroral Zones, Cyclotron Radiation, Electrostatic Waves, Hydrogen, Ion Acoustic Waves, Coronal Loops, Geomagnetism, Sine Waves, Thresholds

Scientific paper

The coherent three-wave decay of a linearly unstable electrostatic hydrogen cyclotron (EHC) wave into stable EHC and ion acoustic modes is considered. The general problem of the three weakly interacting electrostatic normal modes in a Maxwellian plasma is discussed. EHC is examined in a fluid description, and the results are used to guide a similar study in a Vlasov plasma system intended to model the aurora acceleration region parameters. The time dependence of the decay in a simple three-wave interaction is presented in order to show how wave saturation can arise.

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