Physics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9.1143k&link_type=abstract
Geophysical Research Letters, vol. 9, Oct. 1982, p. 1143-1146.
Physics
28
Energetic Particles, Energy Spectra, Magnetospheric Proton Density, Particle Interactions, Pioneer 11 Space Probe, Planetary Magnetospheres, Saturn Atmosphere, Cosmic Rays, Enceladus, Mimas, Saturn Rings, Spectrum Analysis
Scientific paper
Measurements obtained by the Pioneer-11 spacecraft in Saturn's inner magnetosphere revealed the presence of a high energy proton component, primarily confined within the orbits of satellites Enceladus and Mimas. The high energy component was interpreted as due to protons from cosmic ray neutron albedo decay interactions with the Saturnian rings and, secondarily, the planetary atmosphere, but without detailed knowledge of the differential or integral spectrum. The main objective of the present investigation is to examine in some detail the ion spectra in the considered region of the magnetosphere, and to provide some of the basic input necessary in evaluating various models of energetic particle-ring interactions. The conducted measurements clearly show the presence of low energy ions and electrons inside the orbit of Mimas and provide a measure of the evolution of the hot ion spectrum observed inside the orbit of Rhea into a two-component power law spectrum inside the orbits of Enceladus and Mimas.
Armstrong Thomas P.
Krimigis Stamatios M.
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