Electromagnetic radiation from line sources interacting with a moving uniaxial dielectric or plasma half-space

Details Electromagnetic radiation from line sources interacting with a moving uniaxial dielectric or plasma half-space Electromagnetic radiation from line sources interacting with a moving uniaxial dielectric or plasma half-space

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979ap%26ss..63..405m&link_type=abstract

Astrophysics and Space Science, vol. 63, no. 2, July 1979, p. 405-417.

Astronomy and Astrophysics

Astrophysics

2

Anisotropic Media, Electromagnetic Radiation, Electron Plasma, Half Spaces, Line Spectra, Magnetic Fields, Astronomical Models, Differential Equations, Electron Density (Concentration), Graphs (Charts), Magnetohydrodynamics

Scientific paper

The problem of electromagnetic radiation from electric and magnetic line sources interacting with a moving uniaxially anisotropic dielectric or plasma half-space is treated. The anisotropy of the plasma is due to an infinitely strong magnetizing field impressed parallel to the motion of plasma. The line source is oriented normal to the direction of medium motion. The E and the H modes are excited independently in the medium by the magnetic and the electric line sources, respectively. Invoking the saddle-point method of integration, the far-zone radiation field and the radiation pattern are obtained for both line sources. It is found that the radiation from an electric line source is not affected by the anisotropy of the moving medium and that a magnetic line source in vacuum has finite components of radiation in directions which are parallel and antiparallel to the direction of motion for the case of a uniaxial plasma, in contrast to the results for a uniaxial dielectric. Numerical results for the far-zone radiation pattern, referring to a magnetic line source, are presented for several values of parameters characterizing the nondimensional velocity, the anisotropy of the medium, the electron-plasma density and the location of the line source.

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