| Abstract: | Using the statistical random-phase approximation, we derive the equations describing the interaction of short-wavelength oscillations
with irregularities of a magnetized plasma taking into account thermal effects of the spatial dispersion. It is shown that
an additional energy exchange between the wave and the plasma electrons, which is not related to resonance particles or collisions,
occurs in a medium with random irregularities due to the effect of spatial dispersion. This energy exchange can be significant
if the scales of the irregularities along the magnetic field are not very large, so that the dispersion effects in the interaction
of a wave with irregularities are greater than the dissipative ones. We consider in detail the case, typical for the ionosphere,
where the irregularities are field-aligned and the plasma oscillations are polarized almost perpendicular to the magnetic
field. An equation describing the differential redistribution of plasma-oscillation energy in the wavenumber space due to
multiple scattering by the irregularities was obtained taking into account the influence of spatial dispersion on the scattering
process. We discuss application of the results obtained to the interpretation of some ionospheric experiments.
Institute for Solar-Terrestrial Magnetism, lonosphere, and Radio Wave Propagation of the Russain Academy of Sciences, Troitsk,
Moscow region, Russia. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 43, No. 4, pp. 310–324, April,
2000. |
