Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm33a2119m&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SM33A-2119
Physics
[2712] Magnetospheric Physics / Electric Fields, [2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions, [2772] Magnetospheric Physics / Plasma Waves And Instabilities, [2776] Magnetospheric Physics / Polar Cap Phenomena
Scientific paper
We investigate the electrodynamics occurring within the polar cap and at the polar cap boundary of the auroral oval. During 2009, the THEMIS satellites were crossing the lobes of Earth's magnetotail. Using these lobe crossings, we have identified times where there are significant increases in the fluxes of low energy (< 1 keV) ions that are associated with enhanced electromagnetic wave activity. We identify the electromagnetic wave modes and the source of free energy generating the waves. Observations of cold and hot ions during the wave events provide important clues for wave generation. We characterize the energy dissipation through the waves and the potential for electron acceleration above auroral field lines.
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