The Rayleigh-Taylor instability in plasmas with negative ions

Details The Rayleigh-Taylor instability in plasmas with negative ions The Rayleigh-Taylor instability in plasmas with negative ions

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993angeo..11..494d&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 11, no. 6, p. 494-497.

Physics

1

F Region, Magnetohydrodynamic Stability, Negative Ions, Plasma Composition, Rayleigh Waves, Taylor Instability, Geomagnetism, Ionospheric Composition

Scientific paper

The Rayleigh-Taylor instability in plasmas with negative ions is analyzed. The addition of negative ions to ordinary plasmas tends to stabilize the large-K end of the unstable wavenumber range. For a relative concentration of negative ions, epsilon, larger than about 0.6, a 'tongue' of stability appears, in a K vs. epsilon diagram, at rather small K values. Numerical results are obtained relevant to the situation produced by SF6 releases in the bottomside of the earth's equatorial F layer.

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