Particle simulation of ion heating in the ring current

Details Particle simulation of ion heating in the ring current Particle simulation of ion heating in the ring current

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.1001q&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Feb. 1, 1990, p. 1001-1013. Research supported by the University of C

Physics

14

Earth Magnetosphere, Equatorial Atmosphere, Heavy Ions, Ion Cyclotron Radiation, Plasma Heating, Ring Currents, Geos Satellites (Esa), Ion Temperature, Magnetospheric Ion Density

Scientific paper

Heating of heavy ions has been observed in the equatorial magnetosphere in GEOS 1 and 2 and ATS 6 data due to ion cyclotron waves generated by anisotropic hot ring current ions. A one-dimensional hybrid-Darwin code has been developed to study ion heating in the ring current. Here, a strong instability and heating of thermal ions is investigated in a plasma with a los cone distribution of hot ions. The linear growth rate calculation and particle simulations are conducted for cases with different loss cones and relative ion densities. The linear instability of the waves, the quasi-linear heating of cold ions and dependence on the thermal H(+)/He(+) density ratio are analyzed, as well as nonlinear parallel heating of thermal ions. Effects of thermal oxygen and hot oxygen are also studied.

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