Observations of outflowing ion beams on auroral field lines at altitudes of many earth radii

Details Observations of outflowing ion beams on auroral field lines at altitudes of many earth radii Observations of outflowing ion beams on auroral field lines at altitudes of many earth radii

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30..715l&link_type=abstract

Planetary and Space Science, vol. 30, July 1982, p. 715-726. Research supported by the Swedish Board for Space Activities.

Computer Science

45

Auroral Zones, Ion Beams, Ionospheric Composition, Angular Distribution, Energy Spectra, Hydrogen Ions, Oxygen Ions, Prognoz Satellites

Scientific paper

Observations of upward flowing ions of ionospheric origin at altitudes greater than 20,000 km obtained during the Prognoz-7 ion composition experiment are discussed. Examples are presnted of ion beams which are not only strongly collimated in the altitude range 20,000-30,000 km, the ions apparently moving adiabatically upwards, but also have a very strong O(+) dominance at energies below 1 keV. Even angular distributions with a depleted loss cone for H(+) and a beam for (O+) have been found. The O(+) dominance in such cases suggests that it is related to the ion composition in the source region or that the acceleration process is mass-dependent.

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