Observations of spatial distribution of energetic O(3+), O(4+), and O(5+) ions in the magnetosphere

Details Observations of spatial distribution of energetic O(3+), O(4+), and O(5+) ions in the magnetosphere Observations of spatial distribution of energetic O(3+), O(4+), and O(5+) ions in the magnetosphere

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14..685k&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 14, July 1987, p. 685-688.

Physics

6

Ampte (Satellites), Energetic Particles, Magnetospheric Ion Density, Mass Spectrometers, Oxygen Ions, Spatial Distribution, Earth Ionosphere, Satellite-Borne Instruments, Solar Wind

Scientific paper

L profiles of ions with intermediate charge states (O(5+), O(4+), and O(3+) are presented and compared with those of O(+), O(2+), and O(6+) ions in order to determine their possible sources of origin. The L profiles exhibit broad maxima located at L = 6-7 for O(3+) and O(4+) and L = 7-8 for O(5+) ions during periods of low to medium geomagnetic activity. With increasing Kp, the flux versus L distributions extend further earthward and the maxima move to slightly lower L values. While the flux decrease earthward of the maximum is very steep, the gradual decrease outward of the maximum becomes flatter with increasing charge state. These results suggest that O(3+), O(4+), and O(5+) ions are produced predominantly by charge exchange processes, and that the O(4+) and O(5+) ions are produced from the solar wind-originating O(6+).

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