Sources and sinks of equatorially mirroring protons and electrons within the nightside magnetosphere

Details Sources and sinks of equatorially mirroring protons and electrons within the nightside magnetosphere Sources and sinks of equatorially mirroring protons and electrons within the nightside magnetosphere

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agusmsm53a..09k&link_type=abstract

American Geophysical Union, Spring Meeting 2007, abstract #SM53A-09

Physics

2716 Energetic Particles: Precipitating, 2720 Energetic Particles: Trapped, 2724 Magnetopause And Boundary Layers, 2753 Numerical Modeling

Scientific paper

The Imaging Electron Spectrometer (IES) and Imaging Proton Spectrometer (IPS) on the Polar satellite have frequently measured temporary deviations in the isotropy of the pitch angle distributions (PADs) in the nightside region of the magnetosphere inside of 10 RE. Depressions in the observed fluxes of electrons occur with pitch angles around 90° in the equatorial zone, while the more field aligned electrons remain largely unchanged. These butterfly distributions are a regular feature of the equatorial magnetosphere. The orbital precessions of Polar have allowed much of the inner magnetosphere to be observed, approximately 2 ~ 10 E. Electron and proton paths of motion are simulated varied pitch angles for a specific event on 26 October 1999. In addition to a normal butterfly PAD on this day, Polar also observes a short, but intense localized injection of 90° pitch angle ions. The modeling effort can suggest that the magnetopause can play a significant role in both the loss and injection of equatorially drifting particles within the outer regions of the inner magnetosphere.

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