A filament of energetic particles near the high-latitude dawn magnetopause

Details A filament of energetic particles near the high-latitude dawn magnetopause A filament of energetic particles near the high-latitude dawn magnetopause

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.3011l&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 25, p. 3011-3014

Physics

2

Geomagnetic Tail, Magnetohydrodynamic Flow, Magnetopause, Molecular Ions, Neutral Sheets, Satellite Observation, Solar Wind, Space Plasmas, Electric Fields, Electric Moments, Flow Velocity, Geophysical Satellites, Magnetic Flux, Magnetic Moments, Magnetometers, Satellite-Borne Instruments, Solar Flux

Scientific paper

The Geotail satelite detected a filament of tailward-streaming energetic particles spatially separated from the boundary layer of energetic particles at the high-latitude dawn magnetopause at a downstream distance of approximately 80 R(sub E) on October 27, 1992. During this event, the composition and charge states of energetic ions at energies above approximately 10 keV show significant intermix of ions from solar wind and ionospheric sources. Detailed analysis leads to the deduction that the filament was moving southward towards the neutral sheet at an average speed of approximately 80 km/s, implying an average duskward electric field of approximately 1 mV/m. Its north-south dimension was approximately 1 R(sub E) and it was associated with an earthward directed field-aligned current of approximately 5 mA/m. The filament was separated from the energetic particle boundary layer straddling the magnetopause by approximately 0.8 R(sub E) and was inferred to be detached from the boundary layer at downstream distance beyond approximately 70 R(sub E) in the distant tail.

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