Strong turbulence theory of ionospheric cross-field instability

1970 ◽  
Vol 75 (34) ◽  
pp. 7217-7228 ◽  
Author(s):  
Robert H. Williams ◽  
Jerome Weinstock
Keyword(s):  
Turbulence Theory ◽  
Strong Turbulence

Iterative approach to strong turbulence theory

1980 ◽  
Vol 23 (7) ◽  
pp. 1301 ◽  
Author(s):  
Georg Knorr ◽  
Michael Mond
Keyword(s):  
Turbulence Theory ◽  
Iterative Approach ◽  
Strong Turbulence

Convergence of strong turbulence theory

1973 ◽  
Vol 16 (9) ◽  
pp. 1505 ◽  
Author(s):  
J. J. Thomson
Keyword(s):  
Turbulence Theory ◽  
Strong Turbulence

scholarly journals Theory of Strongly Turbulent Two-Dimensional Cross Field Convection of Current Carrying Space Plasmas

1985 ◽  
Vol 107 ◽  
pp. 475-475
Author(s):  
M. J. Keskinen
Keyword(s):  
Numerical Simulations ◽  
Power Law ◽  
Direct Interaction ◽  
Turbulence Theory ◽  
Space Plasmas ◽  
Nonlinear Frequency ◽  
Two Dimensional ◽  
Strong Turbulence ◽  
Direct Interaction Approximation ◽  
Interaction Approximation

The “direct interaction approximation” of Kraichnan as modified by Kadomtsev is employed to develop a two-dimensional strong turbulence theory which predicts both nonlinear frequency broadening and a power law for the spectrum of a convecting plasma containing a gravitationally induced cross field current. These results are favorably compared with experimental observations, numerical simulations, and previous studies1 of turbulent cross field convection of current-carrying plasma.

An Experimental Investigation of Strong Turbulence in a Sheared Magnetoplasma Column

1974 ◽  
Vol 52 (18) ◽  
pp. 1739-1749
Author(s):  
J. E. Robinson ◽  
L. M. Lidsky
Keyword(s):  
Experimental Investigation ◽  
Large Amplitude ◽  
Temporal Evolution ◽  
Broad Band ◽  
Particle Interaction ◽  
Turbulence Theory ◽  
Larmor Radius ◽  
Band Spectrum ◽  
Strong Turbulence ◽  
Amplitude Mode

An experimental investigation of low frequency (ω < Ω1) strong turbulence in a transversely sheared magnetoplasma column is reported. A single large amplitude mode and a broad band spectrum are observed in the radial region of sheared azimuthal velocity. The large amplitude mode, previously identified as Kelvin–Helmholtz turbulence, is studied with respect to coherence, amplitude saturation, and temporal evolution. General agreement is found with Dupree's strong turbulence theory. However, both coherent and incoherent trapping appear to be important for amplitude saturation and coherence. Spatial spreading of the mode is also observed during temporal evolution indicating a more complex wave particle interaction than is currently assumed in nonlinear theory. Using correlation techniques, the broad band spectrum is found to consist of azimuthally propagating clumps of 'ballistic modes' which produce an [Formula: see text] spectrum. The clumps have a scale size of the order of a Larmor radius, propagate with the average rotation velocity, appear to be amplitude limited by trapping, and diffuse spatially as they decay. This observation of clumps represents the first experimental identification of 'ballistic modes' in a magnetoplasma column.

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