Regions of He(+) dominance in the high-latitude topside ionosphere

Details Regions of He(+) dominance in the high-latitude topside ionosphere Regions of He(+) dominance in the high-latitude topside ionosphere

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984p%26ss...32..791q&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 32, July 1984, p. 791-802. Sponsorship: Science and Engineering Research Coun

Computer Science

10

Helium Ions, Ionospheric Composition, Ionospheric Ion Density, Polar Regions, Upper Ionosphere, Atmospheric Models, Convective Flow, Ionospheric Drift, Oxygen Ions, Photoionization, Positive Ions

Scientific paper

Observations of the occurrence of He(+) dominance in the topside ionosphere are discussed. An earlier model of the behavior of high-latitude H(+) and O(+) thermal plasma (Quegan et al., 1982) is extended to include He(+) as a major ion. Calculations using the extended model show that plasma convection is likely to play a key role in producing regions of He(+) dominance. Suggested conditions for He(+) dominance are listed, and their applicability to observed He(+) behavior is discussed.

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