Plasma Sheet Energy Distributions

Details Plasma Sheet Energy Distributions Plasma Sheet Energy Distributions

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm11a1568s&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM11A-1568

Physics

[2730] Magnetospheric Physics / Magnetosphere: Inner, [2748] Magnetospheric Physics / Magnetotail Boundary Layers, [2764] Magnetospheric Physics / Plasma Sheet

Scientific paper

Energy spectra of electrons and ions, as observed by DMSP, are fit to various distributions. The goal is to characterize the inner edge of the plasma sheet, so the focus is on large scale plasma sheet properties. Lower energy electron populations are ignored as they appear to be small-scale transients. Maxwellian, kappa and power-law distributed spectra are considered. Non-thermal ion distributions appear with greater frequency than anticipated. 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 figure shows an apparently non-thermal ion distribution, together with a Maxwellian fit. The results from fits for one full year are presented.

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