Energetic atomic and molecular ions in Saturn's magnetosphere

Details Energetic atomic and molecular ions in Saturn's magnetosphere Energetic atomic and molecular ions in Saturn's magnetosphere

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.8905h&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Nov. 1, 1983, p. 8905-8922. NASA-supported research.

Physics

20

Atomic Spectra, Energetic Particles, Magnetospheric Ion Density, Molecular Ions, Planetary Magnetospheres, Saturn Atmosphere, Abundance, Energy Spectra, Particle Telescopes, Solar Planetary Interactions, Voyager 1 Spacecraft, Voyager 2 Spacecraft

Scientific paper

Voyager 1 and 2 sensor data are analyzed in order to derive the composition, energy spectra, and spatial distribution of energetic ions in the Saturn magnetosphere. In order of abundance, the major species are H, H2(+), He, H3(+), C, and O. The fluxes of all species decreased inside the orbit of Dione, and nearly vanished in the 'slot' region within the orbit of Tethys. Both satellite absorption and precipitation due to pitch angle scattering may be important loss processes in that region. In the outer magnetosphere, photodissociation rapidly destroys a large fraction of the H2(+) ions, but dissociation by impact with neutral H atoms is faster for H2(+) ions in the lowest vibrational state. The ground state lifetime of about 23 days places a limit of about 10-100 days on the mean overall residence time for energetic ions in Saturn's magnetosphere.

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