HR: 1340h
AN: SM33A-1104    [Abstracts]
TI: Sources and sinks of equatorially mirroring energetic charged particles in the earth's inner magnetosphere
AU: * Klida, M M
EM: mklida@bu.edu
AF: Center for Space Physics Boston University, 725 Commonwealth Ave., Boston, MA 02215, United States
AU: Fritz, T A
EM: fritz@bu.edu
AF: Center for Space Physics Boston University, 725 Commonwealth Ave., Boston, MA 02215, United States
AB: 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.
DE: 2720 Energetic particles: trapped
DE: 2724 Magnetopause and boundary layers
DE: 2730 Magnetosphere: inner
DE: 2740 Magnetospheric configuration and dynamics
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting