Computer Science – Sound
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.6665l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 94, June 1, 1989, p. 6665-6680. Research supported by the Swedish Board f
Computer Science
Sound
71
Atmospheric Electricity, Electric Fields, Ionospheric Ion Density, Satellite Sounding, Space Plasmas, Earth Magnetosphere, Ion Beams, Magnetic Moments, Particle Acceleration, Viking Spacecraft
Scientific paper
The measurements of electric fields and the composition of upward flowing ionospheric ions (UFIs), obtained by Viking's Ion Composition Spectrometers are interpreted in terms of a mass-dependent plasma escape process in the upper ionosphere. Results on the temperature and mass-composition of UFI beams suggest that the beams can be generated by a magnetic moment 'pumping' mechanism caused by low-frequency transverse electric field fluctuations, in addition to a field-aligned 'quasi-electrostatic' acceleration process. The results agree with a bimodal model of ionospheric ion acceleration, based on both quasi-static and fluctuating electric fields as the cause for ionospheric plasma escape.
Hultqvist Bengt
Lundin Rickard
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