Induced radiation from a plasma cylinder
Abstract
A general expression is presented for the growth rate of electron normal modes, excited parametrically in a cold plasma cylinder by an electromagnetic pump wave. Conditions for stimulated emission from the plasma at a frequency equal to half the pump frequency are investigated for the case when the electric field varies along the axis of the cylinder. A theory describing the turbulent state which results from the evolution of the parametric instability is developed. The quasi-steady state is due to the generation of the second harmonic of the perturbed modes, which is damped in the electron plasma because of emission into vacuum. The saturation mechanism for the instability is associated with energy transfer from growing modes to leaky modes, which do not interact with the external field, and dissipation due to the emission into vacuum.
- Publication:
-
Plasma Physics
- Pub Date:
- October 1977
- DOI:
- 10.1088/0032-1028/19/10/008
- Bibcode:
- 1977PlPh...19..979G
- Keywords:
-
- Cold Plasmas;
- Plasma Cylinders;
- Plasma-Electromagnetic Interaction;
- Stimulated Emission;
- Energy Transfer;
- Field Strength;
- Modal Response;
- Partial Differential Equations;
- Plasma Oscillations;
- Plasma Spectra;
- Thresholds;
- Plasma Physics