Composition and plasma properties of the plasma sheet in the earth's magnetotail

Details Composition and plasma properties of the plasma sheet in the earth's magnetotail Composition and plasma properties of the plasma sheet in the earth's magnetotail

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986angeo...4..391o&link_type=abstract

Annales Geophysicae, Series A - Upper Atmosphere and Space Sciences, vol. 4, Oct. 1986, p. 391-398.

Physics

Geomagnetic Tail, Plasma Composition, Plasma Layers, Space Plasmas, Helium Plasma, Hydrogen Plasma, International Sun Earth Explorer 1, Oxygen Plasma, Plasma Density, Plasma Temperature

Scientific paper

Using 300 h of plasma sheet observations obtained by the ISEE-1 Ion Composition Experiment in 1978, H(+) and He(2+) densities and temperatures are investigated as functions of magnetospheric substorm activity and geocentric distance. Temperatures of H(+) and He(2+) are well correlated with an average ratio of 2.7 + or - 0.1, though linear regression for high activity periods suggests a nonvanishing T(He2+) in the limit as T(H+) approaches 0. Plasma sheet ion temperatures vary directly with geomagnetic activity and inversely with geocentric distance, while the N(He2+)/N(H+) ratio increases with geocentric distance irrespective of the activity index.

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