The cleft ion fountain

Details The cleft ion fountain The cleft ion fountain

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.9736l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Oct. 1, 1985, p. 9736-9748.

Physics

148

Diurnal Variations, Ion Density (Concentration), Ion Injection, Ionospheric Ion Density, Magnetospheric Ion Density, Polar Caps, Convection, Dynamics Explorer Satellites, Ion Temperature, Mass Spectrometers, Satellite-Borne Instruments

Scientific paper

Low-energy ionospheric ions, injected into the magnetosphere at the dayside cleft, are studied using data for the retarding ion mass spectrometer experiment on the Dynamics Explorer 1 satellite. It is concluded that the upwelling ion events identified in the vicinity of the cleft may be regarded as an ion fountain, supplying low-energy ions to the entire polar magnetosphere when convection is antisunward and strong. It is also shown that heavy ion flows can be downward in the polar cap, consistent with 'parabolic' trajectories of heavy ions from this cleft ion fountain.

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