Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm21c..08m&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SM21C-08
Physics
7867 Wave/Particle Interactions, 2772 Plasma Waves And Instabilities
Scientific paper
We report the results of an investigation of waves observed by the Cluster wideband instrument (WBD) during an orbital conjunction with the Polar spacecraft. During this perigee pass Polar was at the upper extent of the AKR source region in the southern hemisphere nightside auroral region, Cluster was located at higher altitude above this region and observed AKR with clear signatures of ordered fine structure striations (rain). Using electron particle data observed by HYDRA on board Polar, we have modeled the electron distribution function within the AKR source region, This distribution function is unstable to a number of low-frequency wave modes and supports EMIC waves propagating up the magnetic field line. We investigate the role of these waves in stimulating the growth of AKR and producing the ordered fine structure observed by WBD on board Cluster.
Menietti Douglas J.
Mutel Robert L.
Santolik Ondrej
Scudder Jack D.
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