Relativistic electron and energetic ion precipitation spikes near the plasmapause

Details Relativistic electron and energetic ion precipitation spikes near the plasmapause Relativistic electron and energetic ion precipitation spikes near the plasmapause

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.3077i&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, March 1, 1986, p. 3077-3088. Research supported by the Lockheed Indep

Other

15

Electron Precipitation, Plasmapause, Relativistic Particles, Space Plasmas, Cold Plasmas, Cyclotron Resonance, Energy Spectra, Plasma-Particle Interactions, Proton Energy, Satellite Observation

Scientific paper

Results are reported of a search for rare events of precipitation of relativistic electrons in a narrow band of the L shell and simultaneous ion precipitation spikes. The data were collected with four polar orbiting spacecraft which all carried spectrometers, some for electrons, others for protons or ions. Particles/electrons with threshold energies of 30 keV-6.5 MeV were detected by the P72-1, P78-1, S81-1 and the NOAA-6 satellites. Electrons with relativistic energies at the plasmapause were seen during only 1 percent of the events. Attempts to correlate the spike events recorded by the various satellites in different regions of the L shell showed that precipitation events could subtend an arc of up to 25 deg and last up to 2000 sec. A mild correlation was also found with substorms. The events are interpreted in terms of cyclotron resonance wave-particle interactions among radiation belt particles. The narrow energy bands observed are attributed to fine structures in the cold plasma density profiles near the plasmapause.

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