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Dissipation of ionospheric irregularities by wave-particle and collisional interactionsThe nonlinear dissipation of plasma irregularities aligned parallel to an ambient magnetic field is studied numerically using a model which employs both wave-particle and collisional diffusion. A wave-particle diffusion coefficient derived from a local theory of the universal drift instability is used. This coefficient is effective in regions of nonzero plasma gradients and produces triangular-shaped irregularities with spectra which vary as f to the -4th, where f is the spatial frequency. Collisional diffusion acts rapidly on the vertices of the irregularities to reduce their amplitude. The simultaneous action of the two dissipative processes is more efficient than collisions acting alone. In this model, wave-particle diffusion mimics the forward cascade process of wave-wave coupling.
Document ID
19820047480
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bernhardt, P. A.
(Los Alamos Scientific Lab. NM, United States)
Pongratz, M. B.
(Los Alamos Scientific Lab. NM, United States)
Gray, S. P.
(Los Alamos Scientific Lab. NM, United States)
Thomsen, M. F.
(Los Alamos National Laboratory Los Alamos, NM, United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1982
Publication Information
Publication: Journal of Geophysical Research
Volume: 87
Subject Category
Geophysics
Accession Number
82A31015
Distribution Limits
Public
Copyright
Other

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