Diffusion of rotating inhomogeneities in ionospheric plasma

(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image) We consider the problem of generation of small-scale quasistatic electric fields that can lead to establishment of the bipolar regime of inhomogeneity relaxation observed in experimental studies of the properties of an artif...

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Bibliographic Details
Published in:Radiophysics and quantum electronics 1998-02, Vol.41 (2), p.125-135
Main Authors: Erukhimov, L. M., Myasnikov, E. N.
Format: Article
Language:English
Subjects:
Density
Differential rotation
Diffusion
Drift
Inhomogeneities
Ionospherics
Magnetic fields
Planes
Plasma
Scattering
Small scale
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Summary:(ProQuest: ... denotes formulae and/or non-USASCII text omitted; see image) We consider the problem of generation of small-scale quasistatic electric fields that can lead to establishment of the bipolar regime of inhomogeneity relaxation observed in experimental studies of the properties of an artificial turbulence excited in the upper ionosphere by high-power shortwave radio emission [1-8], which is slower than the regime of unipolar diffusion of quasineutral fluctuations of density in a homogeneous strongly magnetized plasma [9-11]. We show that necessary conditions for the existence of this mode are disruption of the symmetry of the initial disturbance in the plasma density with respect to the direction of the field ... and its differential rotation with the drift frequency in the plane orthogonal to ... Assuming that the initial disturbance of the plasma has the form of a plane wave whose wave vector ... makes an angle ... with the normal to ..., we obtain an expression for the drift frequency and study the relations between the fluctuational electric and magnetic fields and the drift velocity of the disturbed plasma in, the linear approximation. We discuss the properties of the nonlinear solution, which, in particular, can describe generation of small-scale plasma inhomogeneities that have a helical structure in the plane orthogonal to ... The phenomenon of frequency broadening of the Doppler spectra of signals of field-aligned SW and USW scattering observed in the case of field-aligned scattering of short and ultrashort radio waves by artificial ionospheric inhomogeneities [4-7] is interpreted.[PUBLICATION ABSTRACT]
ISSN:0033-8443
1573-9120
DOI:10.1007/BF02679629