Parametric decay instability of an upper-hybrid wave in a two-temperature plasma
Abstract
Parametric decay of an upper-hybrid pump into another upper-hybrid wave and a low-frequency lower-hybrid mode is considered in a two-electron temperature plasma. Expressions for the nonlinear dispersion relation and growth rate are obtained. It is found that the growth rate is quite sensitive to the hot-electron temperature and the density ratio of the hot and the cold components only when the side-band frequency is close to the second or third harmonic of the cyclotron frequency. The relevance of our investigation to Q machines and the ELMO bumpy torus is pointed out.
- Publication:
-
Journal of Plasma Physics
- Pub Date:
- April 1994
- DOI:
- 10.1017/S0022377800017505
- Bibcode:
- 1994JPlPh..51..193K