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Linear theory of equatorial spread FA fluid dispersion relation for the drift and interchange (Rayleigh-Taylor) modes in a collisional plasma forms the basis for a linear theory of equatorial spread F. The collisional-drift-mode growth rate will exceed the growth rate of the Rayleigh-Taylor mode at short perpendicular wavelengths and density-gradient scale lengths. The drift mode can grow on the top-side as well as the bottom-side density gradients. It is concluded that below the F peak where spread F predominates, both the drift and Rayleigh-Taylor modes contribute to the total spread F spectrum, with the Rayleigh-Taylor mode dominating at long and the drift mode at short perpendicular wavelengths above the ion Larmor radius.
Document ID
19760033538
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hudson, M. K.
(California, University Los Angeles, Calif., United States)
Kennel, C. F.
(California Univ. Los Angeles, CA, United States)
Date Acquired
August 8, 2013
Publication Date
December 1, 1975
Publication Information
Publication: Journal of Geophysical Research
Volume: 80
Subject Category
Geophysics
Accession Number
76A16504
Funding Number(s)
CONTRACT_GRANT: NGL-05-007-190
CONTRACT_GRANT: NOAA-04-5-022-16
CONTRACT_GRANT: N00014-69-A-0200-4050
Distribution Limits
Public
Copyright
Other

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