Observations of ion streaming during substorms

Details Observations of ion streaming during substorms Observations of ion streaming during substorms

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.7753l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Oct. 1, 1983, p. 7753-7764.

Physics

62

Geomagnetic Tail, Ion Beams, Magnetic Storms, Plasma Diagnostics, Space Plasmas, International Sun Earth Explorer 1, Spectrograms

Scientific paper

The ion beam phenomenon at the plasma sheet boundary is examined for individually identifiable substorms, and the substorm-associated particle phenomena are evaluated in terms of the energy-angle distributions of the plasma population and three-dimensional energetic ion distributions. In all seven cases studied it is found that ion beams streaming earthward and/or tailward are always present at the edge of the plasma sheet adjacent to the tail lobe. Ion beams penetrating into the plasma sheet region with no detectable density gradient are also observed. Beams at tens to hundreds of eV often stream tailward and are often long lasting, suggesting that they may be related to ionospheric sources. Both tailward and earthward streaming beams are detected for ion beams above 1 keV, consistent with an origin from the distant tail, propagation toward earth, and mirroring back under single particle motions.

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