Observations of atomic oxygen /O/+// in the earth's magnetotail

Details Observations of atomic oxygen /O/+// in the earth's magnetotail Observations of atomic oxygen /O/+// in the earth's magnetotail

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82..129f&link_type=abstract

Journal of Geophysical Research, vol. 82, Jan. 1, 1977, p. 129-134.

Physics

23

Atmospheric Ionization, Energy Spectra, Geomagnetic Tail, Ionized Gases, Ionospheric Ion Density, Oxygen Ions, Electrostatic Probes, Explorer Satellites, Kinetic Energy, Radial Distribution, Satellite Observation, Velocity Distribution

Scientific paper

The electrostatic analyzer aboard Imp 7 examined energy spectra of positive ions in certain streaming plasmas adjacent to the plasma sheet and within the geomagnetic tail at geocentric radial distances of about 35 R-E, revealing minor, though often persistent, secondary maxima of intensities with energy per unit charge a factor of 16 greater than that of the maxima corresponding to the dominant H(+) ions. The secondary maximum at higher E/Q was identified as a small flux of singly ionized atomic oxygen O(+), from the ionosphere. O(+) fluxes in the geomagnetic tail were about 10 to the 5th/(sq cm s) and imply O(+) upward fluxes in the upper ionosphere of about 10 to the 8th/(sq cm s). The kinetic energy of the oxygen ions is about 1-5 keV, while estimates of the global escape of the ions are about 3 x 10 to the 6th kg/yr.

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