Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.292..718k&link_type=abstract
Nature, vol. 292, Aug. 20, 1981, p. 718-721. NASA-supported research;
Astronomy and Astrophysics
Astronomy
24
Energetic Particles, Neutral Particles, Particle Emission, Planetary Magnetospheres, Saturn Atmosphere, X Ray Sources, Auroral Zones, Planetary Radiation, Saturn Rings, Spaceborne Astronomy, Trapped Particles, Voyager 1 Spacecraft, Saturn, Magnetosphere, X-Rays, Particles, Emissions, Lecp, Ions, Disk, Radiation, Low Energy Charged Particle Detector, Electrons, Flux, Toruses, Rings, Procedure, Data, Energy, Spectrum, Voyager 1
Scientific paper
A description is presented of observations of the Voyager 1 spacecraft obtained a few days before encounter of the Saturn magnetosphere in November 1980. As Voyager 1 has no special experiment onboard for X-ray and neutral particle detection, the sensitivity and directional measurements of the low energy charged particle (LECP) analyzer is used to identify the neutral radiation above the charged particle background. The LECP telescope uses a silicon detector of 96.6 micrometers thickness and 0.08 sq cm area to accumulate counts in eight separate sectors near the ecliptic plane. The existence of radiation above the detector background emanating from the vicinity of Saturn, upstream from the bow shock is shown. The excess counts are most plausibly attributed to neutral radiation, that is, X rays and/or neutral energetic particles. However, in connection with quantitative considerations the observed excess counts are probably not due to X-rays. It is concluded that charge exchange of energetic ions with satellite tori is an important loss mechanism at Saturn as well as at Jupiter.
Gloeckler George
Huen Ip Wing
Kirsch E.
Krimigis Stamatios M.
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