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

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984stin...8425585p&link_type=abstract

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Statistics

Density Distribution, Helium Ions, Prognoz Satellites, Solar Wind, Spectrum Analysis, Channel Multipliers, Chemical Composition, Mass Spectroscopy, Shock Waves, Velocity Distribution

Scientific paper

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 to 5.2 keV/e. Furthermore, the fact that the experiment is continuously monitoring in the solar direction means that fairly good statistics can be aquired as well. In a few cases, He(+)/He(++) ratios up to approximately 0.05 were found, but in most cases when He(+) was observed, it was generally of the order 0.3 to 3% of the He(++) content. The results were compared 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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