Other
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.2921n&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, March 1, 1985, p. 2921-2926.
Other
5
Electron Cyclotron Heating, Electrostatic Waves, Heavy Ions, Hydrogen Ions, Light Ions, Space Plasmas, Auroras, Magnetohydrodynamic Stability, Power Spectra, Velocity Distribution
Scientific paper
Heating of hydrogen ions has been investigated by plasma numerical simulations in the presence of an electrostatic oxygen cyclotron (EOC) wave which is observed on auroral field lines at low altitudes (400-600 km). Two types of instabilities have been found which can be driven by an EOC wave. One of them is an oscillating current-driven electrostatic hydrogen cyclotron instability whose frequency is near the hydrogen cyclotron frequency. The other is an oscillating lower hybrid two-stream instability whose frequency is near the lower hybrid. Two-dimensional numerical simulations confirmed the presence of both instabilities resulting in strong heating of hydrogen ions. High-energy tails of the hydrogen ions are observed in perpendicular distribution.
Nishikawa Ken-Ichi
Okuda Haruyuki
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