Physics – Plasma Physics
Scientific paper
Jun 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.2061e&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 12, p. 2061-2064
Physics
Plasma Physics
96
Magnetospheric Physics: Auroral Phenomena, Magnetospheric Physics: Plasma Waves And Instabilities, Space Plasma Physics: Waves And Instabilities, Ionosphere: Plasma Waves And Instabilities
Scientific paper
The Fast Auroral SnapshoT (FAST) satellite has made observations in the Auroral Kilometric Radiation (AKR) source region with unprecedented frequency and time resolution. We confirm the AKR source is in a density depleted cavity and present examples in which cold electrons appeared to have been nearly evacuated (nhot>ncold). Electron distributions were depleted at low-energies and up-going ion beams were always present. Source region amplitudes were far greater than previously reported, reaching 2×10-4(V/m)2/Hz (300 mV/m) in short bursts with bandwidths generally <1 kHz. Intense emissions were often at the edge of the density cavity. Emissions were near or below the cold plasma electron cyclotron frequency in the source region, and were almost entirely electromagnetic. The |
Carlson Carl W.
Cattell Cynthia A.
Chaston Christopher. C.
Delory Gregory T.
Elphic Richard
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