Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm33a1104k&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM33A-1104
Physics
2720 Energetic Particles: Trapped, 2724 Magnetopause And Boundary Layers, 2730 Magnetosphere: Inner, 2740 Magnetospheric Configuration And Dynamics
Scientific paper
The Imaging Proton Spectrometer (IPS) and the Imaging Electron Spectrometer (IES) on the Polar satellite have measured temporary deviations in the isotropy of the pitch angle distributions (PADs) of charged particles in the inner magnetosphere. As Polar passes through the nightside equatorial region, the IPS and IES observe dropouts of charged particles with pitch angles near 90°, known as butterfly distributions caused by the shadowing of the magnetopause. Additionally, Polar observes a lower energy (< 60 keV) injection of locally mirroring ions while simultaneously detecting butterfly PADs in both higher energy ions and electrons. With these observations and the modeling of single particle motion, it can be shown that the magnetopause may act as both a source and a sink for energetic ions within the earth's magnetosphere.
Fritz Teresa A.
Klida M. M.
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