Parametric excitation of standing electromagnetic waves.
Abstract
The threshold for parametric excitation of standing electromagnetic waves by a standing electromagnetic pump wave with the same frequency is derived. A homogeneous plasma is considered, and a method based on energy balance is used. The threshold is found to depend on the amplitude of the electron motion in the pump wave and on the angle between the direction of this motion and the electric component of the excited wave. Waves in the same mode as the pump wave can be excited more easily than waves in the opposite mode. This instability may be important in ionospheric-modification experiments.
- Publication:
-
Physica Scripta
- Pub Date:
- January 1976
- DOI:
- 10.1088/0031-8949/13/1/006
- Bibcode:
- 1976PhyS...13...47L
- Keywords:
-
- Electromagnetic Wave Transmission;
- Ionospheric Propagation;
- Magnetohydrodynamic Stability;
- Standing Waves;
- Wave Excitation;
- Electron Mobility;
- Ion Acoustic Waves;
- Plasma Density;
- Thresholds;
- Geophysics