Ion acceleration in the magnetospheric ring current

Details Ion acceleration in the magnetospheric ring current Ion acceleration in the magnetospheric ring current

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ge%26ae..27...86s&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 27, Jan.-Feb. 1987, p. 86-93. In Russian.

Physics

2

Cyclotron Resonance, Ion Temperature, Magnetospheric Ion Density, Particle Acceleration, Plasma-Electromagnetic Interaction, Ring Currents, Proton Energy, Solar Terrestrial Interactions

Scientific paper

The cyclotron mechanism of energy transfer from high-energy ring-current protons to ionospheric ions is examined. The cyclotron instability of the protons occurs on one pass of the ring current in the form of a short radiation burst, after which the excited waves are reabsorbed in a gyroresonance region with heavy ions. As a result, the ring current is enriched with helium and oxygen ions with energies greater than 10 keV. A qualitative theory of this acceleration mechanism, based on the quasi-linear theory of wave relaxation in plasmas, is developed.

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