Plasma observations at the earth's magnetic equator

Details Plasma observations at the earth's magnetic equator Plasma observations at the earth's magnetic equator

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.2385o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, March 1, 1987, p. 2385-2407.

Physics

90

Magnetic Equator, Magnetically Trapped Particles, Plasma Density, Plasma Waves, Thermal Plasmas, Cyclotron Radiation, Earth Magnetosphere, Helium Ions, Magnetic Fields

Scientific paper

New observations of particle and wave data from the magnetic equator from the DE 1 spacecraft are reported. The results demonstrate that the equatorial plasma population is predominantly hydrogen and that the enhanced ion fluxes observed at the equator occur without an increase in the total plasma density. Helium is occasionally found heated along with the protons, and forms about 10 percent of the equatorially trapped population at such times. The heated H(+) ions can be characterized by a bi-Maxwellian with kT(parallel) = 0.5-1.0 eV and kT = 5-50 eV, with a density of 10-100/cu cm. The total plasma density is relatively constant with latitude. First measurements of the equatorially trapped plasma and coincident UHR measurements show that the trapped plasma is found in conjunction with equatorial noise.

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