Physics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3416107v&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 16, CiteID L16107
Physics
Magnetospheric Physics: Auroral Phenomena (2407), Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Energetic Particles: Trapped, Magnetospheric Physics: Energetic Particles: Precipitating, Magnetospheric Physics: Field-Aligned Currents And Current Systems (2409)
Scientific paper
Information about the magnitude of the field-aligned potential drop along auroral field lines is usually derived from the velocity distribution of the particles. So far the electron distribution functions have been used systematically only to derive the total potential drop above the satellite, by setting it equal to the peak energy of the electrons. When the electrons are accelerated by a concentrated electric field, their velocity distribution will have features different from those produced by a weak, spread-out, electric field. Quantifying these features, we obtain a method that can provide details about the strength and thickness of a concentrated electric field layer when it is located not too far above the satellite. The method is checked and proved to work satisfactory on simulated and measured data.
Bunescu Costel
Marghitu Octav
Ronnmark Kjell
Vedin Jörgen
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