GEOS-2 measurements of cold ions in the magnetosheath

Details GEOS-2 measurements of cold ions in the magnetosheath GEOS-2 measurements of cold ions in the magnetosheath

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33..675r&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 33, June 1985, p. 675-684. Research supported by the Science and Engineering

Physics

2

Geos 2 Satellite, Magnetosheath, Magnetospheric Ion Density, Plasma Probes, Satellite Observation, Energy Spectra, Flux Quantization, Geomagnetism, Ion Temperature, Satellite-Borne Instruments, Solar Terrestrial Interactions, Solar Wind

Scientific paper

The detection of cold ions in the magnetosheath using the Suprathermal Plasma Analyzer (SPA) instruments on board the GEOS-2 satellite is reported. Large fluxes of ions with temperatures of the order of 1 eV or less were consistently detected at space potential when the spacecraft was in the magnetosheath, but not when it was in the nearby magnetosphere. It is suggested that the cold ions may have been sputtered as neutrals from the spacecraft surface by the impact of solar wind ions and were subsequently ionized by sunlight or electron impact. The consequences of cold ion sputtering for the long-term stability of spacecraft surfaces are briefly addressed.

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