Laboratory studies of charged particle erosion of SO2 ice and applications to the frosts of Io

Details Laboratory studies of charged particle erosion of SO2 ice and applications to the frosts of Io Laboratory studies of charged particle erosion of SO2 ice and applications to the frosts of Io

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...259..920l&link_type=abstract

Astrophysical Journal, Part 1, vol. 259, Aug. 15, 1982, p. 920-929.

Astronomy and Astrophysics

Astrophysics

52

Charged Particles, Energy Spectra, Erosion, Frost, Io, Particle Acceleration, Sulfur Dioxides, Backscattering, Earth Magnetosphere, Jupiter Atmosphere, Laboratory Equipment, Particle Energy, Particle Flux Density, Solar Wind, Temperature Dependence

Scientific paper

The removal and/or redistribution of SO2 frosts on the surface of the first Galilean satellite, Io, can occur through the erosion of these frosts by the magnetosphere particle environment of the satellite. The energy, species, and temperature dependence of the erosion rates of SO2 ice films by charged particles have been studied in laboratory experiments. Rutherford backscattering and thin film techniques are used in the experiments. The ice temperature is varied between about 10 K and the sublimation temperature. The erosion rates are found to have a temperature-independent and a temperature-dependent regime and to be much greater, for 10-2000 keV ions, than those predicted by the usual sputtering process. The laboratory results are used together with measured magnetosphere particle fluxes in the vicinity of Io to estimate the erosion rates of SO2 ice films from the satellite and implications therefrom on an SO2 atmosphere on Io.

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