Nonresonant interaction of heavy ions with electromagnetic ion cyclotron waves

Details Nonresonant interaction of heavy ions with electromagnetic ion cyclotron waves Nonresonant interaction of heavy ions with electromagnetic ion cyclotron waves

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....9010945b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Nov. 1, 1985, p. 10,945-10,960.

Physics

30

Equatorial Atmosphere, Heavy Ions, Ion Cyclotron Radiation, Particle Acceleration, Plasma-Electromagnetic Interaction, Distribution Functions, Earth Magnetosphere, Helium Ions, Particle Trajectories

Scientific paper

The motion of a heavy ion in the presence of an intense ultralow-frequency electromagnetic wave propagating along the dc magnetic field is analyzed. Starting from the basic equations of motion and from their associated two invariants, the heavy ion velocity-space trajectories are drawn. It is shown that after a certain time, particles whose initial phase angles are randomly distributed tend to bunch together, provided that the wave intensity b-sub-1 is sufficiently large. The importance of these results for the interpretation of the recently observed acceleration of singly charged He ions in conjunction with the occurrence of large-amplitude ion cyclotron waves in the equatorial magnetosphere is discussed.

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