The Inner Edge of the Plasma Sheet

Details The Inner Edge of the Plasma Sheet The Inner Edge of the Plasma Sheet

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm13a1793s&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM13A-1793

Physics

[2455] Ionosphere / Particle Precipitation, [2730] Magnetospheric Physics / Magnetosphere: Inner, [2764] Magnetospheric Physics / Plasma Sheet

Scientific paper

Energy spectra of electrons and ions, as observed by DMSP at the equatorwrd edge of the auroral oval, are fit to various distributions. The focus is on large-scale plasma sheet properties. Lower energy populations are ignored as they appear to be small-scale transients. Maxwellian, kappa, linear and Ellison-Ramaty distributed spectra are considered. The inner edge of the ion plasma sheet is non-thermal roughly 30% of the time and the electron plamsma sheet roughly 50% of the time. In order to be thermally distributed the differential energy flux must rise with a slope of ~2 toward a peak, after which the flux should fall sharply. The relationship between the high- and low-altitude portion of the plasma sheet's inner edge is examind by comparing DMSP boundaries with simultaneous THEMIS boundaries. Statistical results, as well as examples from high speed streams, will be presented.

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