Observations of singly ionized helium in the solar wind.

Details Observations of singly ionized helium in the solar wind. Observations of singly ionized helium in the solar wind.

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990cosre..27..614e&link_type=abstract

Cosmic Res., Vol. 27, No. 5, p. 614 - 621

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Solar Wind: Helium

Scientific paper

The authors present results of measurements of an anomalous ion component of the solar wind. The measurements were made on April 30, 1985 by means of a mass spectrometer on the Prognoz-10-Interkosmos satellite. As well as highly ionized ions of heavy elements (which are formed in hot coronal plasma), they also detect ions of He+: these can form only at temperatures which are significantly lower than coronal values. The ratio of ion densities He+/He2+ was about 1.10-3. An overview of the data leads to the proposal that this event was associated with the ejection of coronal matter from the Sun. The authors compare the principal characteristics of the April 30, 1985 event with the other rather rare cases where ions of He+ have been observed in the solar wind.

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