Interchange events in Saturn's magnetosphere: Frequency, spatial distribution, and implications for plasma transport

Details Interchange events in Saturn's magnetosphere: Frequency, spatial distribution, and implications for plasma transport Interchange events in Saturn's magnetosphere: Frequency, spatial distribution, and implications for plasma transport

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsm12a..03c&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SM12A-03

Physics

2730 Magnetosphere: Inner, 2760 Plasma Convection, 5737 Magnetospheres (2756)

Scientific paper

During the Cassini spacecraft's first orbits around Saturn, numerous transient events were observed in the planet's inner magnetosphere. These events are characterized by an abrupt increase in the magnetic field strength, a simultaneous disappearance of the low energy ion and electron populations and the appearance of a hot electron population with energies between one hundred and a few thousand eV. In some cases, these events are associated with time-dispersed energetic particle events. These characteristics are consistent with the rapid interchange of flux tubes and the injection of hot, tenuous plasma from the outer magnetosphere. This process, also observed by the Galileo spacecraft at Jupiter, is associated with the radial transport of plasma and the centrifugally-driven Raylegh-Taylor instability. We present a statistical analysis of these events, describing their average properties, frequency of occurrence, and spatial distribution. We identify the regions where these events are most frequent, with the regions where radial transport is most vigorous.

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