Radiation and propagation of electron waves in an arbitrary direction in a magnetoplasma
Abstract
Propagation of an electron wave emitted by a point source in a magnetoplasma is studied both experimentally and theoretically. In an anisotropic plasma the radiation property changes with the electron plasma frequency f(p) and the electron cyclotron frequency f(c). For electron wave frequency (f) between f(p) and f(c) the kinetic and hydrodynamic theories yield almost the same ray velocities, but the kinetic theory gives a better wave potential. For f(c) less than f the electron cyclotron (Bernstein) mode exists in addition to the electron plasma (Landau) mode. The latter propagates in a wide angular range and the equiphase surfaces are almost parallel to the magnetic field. Some of the theoretical predictions are confirmed by observation.
- Publication:
-
Electronics Communications of Japan
- Pub Date:
- October 1977
- Bibcode:
- 1977JElCo..60...65O
- Keywords:
-
- Electron Plasma;
- Magnetic Fields;
- Plasma Radiation;
- Plasma Waves;
- Point Sources;
- Anisotropic Media;
- Cyclotron Frequency;
- Kinetic Theory;
- Phase Velocity;
- Plasma Frequencies;
- Communications and Radar