Physics
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2083b&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 19, p. 2083-2086
Physics
4
Electrostatic Waves, Geomagnetic Tail, Ion Distribution, Neutral Sheets, Particle Acceleration, Hole Distribution (Electronics), Holes (Electron Deficiencies), Magnetohydrodynamic Stability, Wave-Particle Interactions
Scientific paper
The stability of ion distributions with velocity space holes caused by chaotic ion acceleration in the vicinity of the field reversal region in the Earth's magnetotail is investigated. It is shown that such distributions are unstable to electrostatic waves with wave vector directed along the Sun-Earth line. The solution of the quasi-linear equation shows that the saturation of the instability occurs due to velocity space trapping of the low-energy background ions and results in a flattening of the reduced ion distribution function in the region of the original velocity space hole. The energy level of the excited waves in the vicinity of the Earth's midplane is estimated as a function of the initial size of the empty velocity space region.
Ashour-Abdalla Maha
Burinskaya T.
Schriver David
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