Other
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.3907c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, April 1, 1990, p. 3907-3924. Research supported by the University of
Other
16
Geomagnetism, Ion Beams, Polar Caps, Space Plasmas, Dynamics Explorer 1 Satellite, Mass Spectrometers, Oxygen Ions, Plasma Waves
Scientific paper
The plasma characteristics of upflowing ion stream events with energies greater than 10 eV in the polar cap region near solar maximum are analyzed. It is found that, in 22 of the 41 polar ion streaming events studied, O(+) is the dominant ion constituent in the upflowing beam components. There are significant amounts of upflowing O(+) in the plasma even during quiet auroral conditions. In one event, the upflowing O(+) population had two components, a cold distribution and a warm one. In another event the O(+) and H(+) temperatures suggested that ionospheric ions are heated. The cold upflowing ion stream component observed in some of the polar ion streaming events exhibited a filamentary nature. A significant amount of He(+) was also found in some of the events studied.
Ashour-Abdalla Maha
Chen Margaret W.
Moore Thomas Earle
Persoon Ann M.
Peterson William K.
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