Physics
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31..173h&link_type=abstract
Planetary and Space Science, vol. 31, Feb. 1983, p. 173-184. Research supported by the Swedish Board for Space Activities.
Physics
29
Energetic Particles, Magnetospheric Instability, Magnetospheric Ion Density, Particle Acceleration, Positive Ions, Daytime, High Temperature Plasmas, Hydrogen Ions, Lines Of Force, Oxygen Ions, Space Plasmas
Scientific paper
On the basis of observations in the dayside magnetosphere of the O(+) and H(+) ion densities as a function of radial distance under fairly undisturbed and under storm conditions it is argued that acceleration of the hot magnetospheric ions of ionospheric origin cannot be limited to the outer parts of the field tubes. The extraction process seems to work below 1000 km altitude in storm conditions and to have a fairly small extension in altitude. The acceleration mechanism(s) do(es) not affect only one ion species. Variation in the altitude of the extraction of ionospheric ions is the most likely reason for the observed variations in the n(O/+/)/n(H/+/) ratio. Extraction of ionospheric ions into the magnetosphere does not seem to be a main cause of the storm time density decrease of the ionosphere.
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