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Plasmapause diffusionThe Bohm diffusion coefficient and observed electrostatic wave scattering are used as the bases of estimates of the smoothing effect that diffusion may have on steep plasmapause density gradients. The estimate for diffusion resulting from scattering by observed electrostatic waves is found to be much lower than that of the perpendicular Bohm diffusion coefficient for characteristic plasma temperatures and magnetic fields. This diffusion rate estimate may be too small, however, if the wave amplitudes are significantly higher for steep plasmapauses. The effects are therefore negligible for most considerations of macroscopic plasmapause dynamics, but may be significant in limiting drift wave instabilities and similar phenomena driven by the steepness of the plasmapause density gradient.
Document ID
19830052731
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Horwitz, J. L.
(Alabama, University Huntsville, AL, United States)
Date Acquired
August 11, 2013
Publication Date
June 1, 1983
Publication Information
Publication: Journal of Geophysical Research
Volume: 88
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
83A33949
Funding Number(s)
CONTRACT_GRANT: NAS8-33982
Distribution Limits
Public
Copyright
Other

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