Transverse ion heating in multicomponent plasmas along auroral zone field lines

Details Transverse ion heating in multicomponent plasmas along auroral zone field lines Transverse ion heating in multicomponent plasmas along auroral zone field lines

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....9312826a&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Nov. 1, 1988, p. 12826-12840.

Physics

21

Auroral Zones, Heavy Ions, Ionospheric Heating, Plasma Composition, Plasma Heating, Auroral Electrojets, Geomagnetism, Ion Accelerators, Pitch (Inclination)

Scientific paper

This paper considers plasma modes that can occur in a multicomponent plasma, such as an O(+)-H(+) plasma, along auroral zone field lines and the effect of these plasma modes on heavy-ion acceleration. A simulation study of ion heating by ion cyclotron, lower hybrid, and ion-ion hybrid waves is conducted using parameters that pertain to different regions of the aurora. Three different auroral regions are identified, in which various types of heating occur; these regions are distinguished by the plasma conditions found there and by the instability that would be expected to be dominant in the ion-heating process. It is shown that, when a small amount of helium ions are added into the predominantly hydrogen and oxygen plasma, two ion-ion hybrid modes exist: hydrogen-helium and oxygen-helium modes (in addition to the lower hybrid mode). The effect of ion heating by these wave modes is discussed.

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