Finite parallel wavelengths and ionospheric structuring

Details Finite parallel wavelengths and ionospheric structuring Finite parallel wavelengths and ionospheric structuring

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.4075s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, May 1, 1983, p. 4075-4085. Research supported by the U.S. Defense Nuc

Physics

9

Crossed Fields, Geomagnetism, Ionospheric Disturbances, Space Plasmas, Taylor Instability, Diffusion Coefficient, Electric Fields, Energy Transfer, Magnetic Fields, Wavelengths

Scientific paper

In the disturbed ionosphere, gradient drift instabilities are regarded as the primary sources for fluid structuring. In the present investigation, finite wave number components parallel to the ambient magnetic field are included in an analysis of Rayleigh-Taylor and E X B gradient drift instabilities. It is found that the accompanying small but finite parallel electric fields are not totally electrostatic, but rather can have a significant inductive nature. The dispersion relation including parallel wave number and parallel electric fields is derived. Attention is also given to quasi-linear interactions, and two examples which illustrate situations in which the additional diffusion associated with magnetic field fluctuations is likely to play a role.

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