Structuring of the AMPTE magnetotail barium releases

Details Structuring of the AMPTE magnetotail barium releases Structuring of the AMPTE magnetotail barium releases

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14...60h&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 14, Jan. 1987, p. 60-63. DNA-supported research.

Physics

59

Ampte (Satellites), Barium Ion Clouds, Geomagnetic Tail, Magnetohydrodynamic Stability, Expansion, Larmor Radius, Taylor Instability

Scientific paper

A new instability is proposed to explain the observed large-scale structuring of the magnetotail AMPTE barium releases. The stability theory is based on a modified set of MHD equations which allows for large Larmor radius effects, i.e., an ion Larmor radius of about the transverse radius of the cloud, which is typical of the AMPTE releases. The mode is driven by the deceleration of the cloud and the density gradient at the edge of the cloud. The predicted linear growth rate and eigenmode structure are consistent with AMPTE observations.

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