Observations of He(+) ions in the solar wind

Details Observations of He(+) ions in the solar wind Observations of He(+) ions in the solar wind

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.4367p&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, May 1, 1985, p. 4367-4372.

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Abundance, Helium Ions, Solar Wind, Mass Spectra, Prognoz Satellites

Scientific paper

This paper describes results obtained from the Prognoz 8 ion composition experiment which indicates that He+ ions may be more abundant in the solar wind than previous measurements have indicated. The experiment has a sufficiently high mass resolution to accurately discriminate between H+, He++, He+, and O+ ions over the energy range 0.35 - 5.2 keV/el. In a few cases, He+/He++ ratios up to ≈0.05 have been found, but in most cases when He+ was observed it was generally of the order 0.3 - 3% of the He++ content. The authors compare their results with previous measurements of He+ ions in the solar wind and discuss also other constituents with M/q = 4 as alternative candidates. Finally, a possible explanation for the high He+ abundance in the disturbed solar wind is given.

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