Composition and Sources of Suprathermal Ions in Saturn's Magnetosphere

Details Composition and Sources of Suprathermal Ions in Saturn's Magnetosphere Composition and Sources of Suprathermal Ions in Saturn's Magnetosphere

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p51a1415h&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #P51A-1415

Physics

5737 Magnetospheres (2756), 6275 Saturn

Scientific paper

The Charge-Energy-Mass Spectrometer (CHEMS), one of three sensors comprising the MIMI investigation on Cassini, measures the mass and charge state of ions in the energy per charge range 3--220 keV/e. CHEMS has determined the composition of the suprathermal ions during Cassini's first pass through Saturn's magnetosphere. The most abundant species were H+, H2+, and O+. Also present were the molecular ions OH+, H2O+, and O2+ as well as doubly charged oxygen O++. We have observed a near absence of N+ ions. This composition, which features water products, indicates that Saturn's rings and icy moons are strong plasma sources while Titan, with its largely nitrogen atmosphere, is not. We will discuss composition variations with position in Saturn's magnetosphere as well as any temporal changes observed between Cassini's first and second orbits.

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