Heavy ion density enhancements in the outer plasmasphere

Details Heavy ion density enhancements in the outer plasmasphere Heavy ion density enhancements in the outer plasmasphere

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9213499r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Dec. 1, 1987, p. 13499-13512. Research supported by the University of

Physics

Plasma Physics

28

Heavy Ions, Ion Density (Concentration), Nitrogen Ions, Oxygen Ions, Plasmasphere, High Frequencies, Plasma Physics

Scientific paper

The occurrences of density enhancements of thermal heavy ions O(+), O(2+), and N(+) observed on numerous occasions by mass spectrometer aboard the Dynamics Explorer 1 (DE 1) are studied. A statistical study, covering almost 600 passes of DE 1 through the plasmasphere, shows that O(+) and O(2+) enhancements occur over 64 percent of the observed passes, with the highest frequency of occurrence being in the late evening and morning regions. The O(+) enhancements tend to be seen more frequently in the morning, while the O(2+) enhancements are seen more often in the evening. Two models for the generation of the enhancements are described, and the data from the analysis are interpreted in light of these models.

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