Natural Generation of Electromagnetic Waves and Interactions with Media. Part 2.

摘要

Existing formulae for bremsstrahlung cross-sections for charged particles precipitating into the lower ionosphere at high latitudes have been corrected to include the dependence on angle in the photo-ionization by bremsstrahlung photons. The study of polarization of bremsstrahlung X-rays in the lower ionosphere disclosed that the polarization parameters vary with height and are energy dependent so that precision measurement of X-ray polarization could be used for diagnostic purposes. It was found that the effect of an electric field along field lines on whistler-mode waves results in unducting of the wave. For processes in the equatorial electrojet it was concluded that the two-stream instability criteria is not satisfied during the westward current flow and magnetic-field depressions are correlated with the disappearance of equatorial sporadic-E traces on ionograms. A secondary peak in intensity distribution of synchrotron radiation from a weakly-relativistic electron plasma is interpreted as being due to scattering of radiation by plasma inhomogeneities. (Author)