Physics – Plasma Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11612234m&link_type=abstract
Journal of Geophysical Research, Volume 116, Issue A12, CiteID A12234
Physics
Plasma Physics
Magnetospheric Physics: Auroral Phenomena (2407), Magnetospheric Physics: Plasma Waves And Instabilities (2471), Planetary Sciences: Fluid Planets: Magnetospheres (2756), Space Plasma Physics: Wave/Particle Interactions (2483, 6984)
Scientific paper
Observations of intense upgoing electron beams and diffuse ion beams have been reported during a pass by Cassini in a downward current auroral region, nearby a source region of Saturn kilometric radiation. Using the Cassini Radio and Plasma Wave Science (RPWS) instrument low frequency waveform receiver and the Cassini Plasma Spectrometer Investigation (CAPS) instrument we have been able to identify ion cyclotron harmonic waves associated with the particle beams. These observations indicate similarities with terrestrial auroral emissions, and may be a source of wave-particle interactions. We fit the observed plasma electron distribution with drifting Maxwellians and perform a linear numerical analysis of plasma wave growth. The results are relevant to ion heating and possibly to electron acceleration.
Coates Andrew J.
Crary F. F.
Gurnett Donald A.
Menietti Douglas J.
Santolik Ondrej
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