Abstract
We present a new analysis of the composition of energetic charged particles in Saturn's inner magnetosphere. This analysis is motivated by a discovery made after the Voyager 1 and 2 Saturn encounters of penetrating electrons in some total ion measurement channels of the Low Energy Charged Particle detectors. From this new analysis, we predict that there is no significant increase in the ratio of heavy energetic ions to protons inward of the orbit of the satellite Dione, as previously thought. This implies that energetic ion sputtering of the icy rings and satellites produces much less water vapor than has been assumed based on past composition estimates. For protons between about 500 keV and a few MeV, we observe a decrease in measured flux inward of about L = 6 and suggest the cause of this decrease is not well understood.
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