Suprathermal H(+) and He(2+) in the distant geomagnetic tail ISEE-3 observations

Details Suprathermal H(+) and He(2+) in the distant geomagnetic tail ISEE-3 observations Suprathermal H(+) and He(2+) in the distant geomagnetic tail ISEE-3 observations

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icrc...10...26g&link_type=abstract

IN: International Cosmic Ray Conference, 18th, Bangalore, India, August 22-September 3, 1983, Late Papers. Volume 10 (A85-22801

Other

Energetic Particles, Geomagnetic Tail, Helium Ions, Hydrogen Ions, Energy Spectra, Ion Temperature, Satellite Observation

Scientific paper

Preliminary ISEE 3 observations of suprathermal H(+) and He(2+) in the distant geomagnetic tail are summarized, with an emphasis on their energy spectra and composition. Regions found near earth are duplicated in the distant tail, but with various regions more intermixed and less distinct. The H(+) and He(2+) energy spectra in all regions and at all geocentric distances for which observations exist are on average not power laws but are well represented by a given expression. The He(2+)/H(+) ratio of 0.03 to 0.07 in the plasma sheet shows no systematic variation with geocentric distance and is two to three times lower than in the other regions. Well-directed, strong, tailward flows distinguish the near bow-shock/magnetosheath region from the geomagnetic tail and plasma sheet where anisotropies are generally smaller and the flow direction more variable although still tailward, indicating source locations at less than 60 earth radii most of the time.

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