Parametric Instabilities in Turbulent, Inhomogeneous Plasma
- 11 November 1974
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 33 (20) , 1207-1210
- https://doi.org/10.1103/physrevlett.33.1207
Abstract
It is known that parametric instabilities involving two coupled modes, with oppositely directed group velocities, saturate convectively if the medium is inhomogeneous. This work considers the modification of that result when weak long-wave turbulence is present, in addition to the background inhomogeneity. We find that the convective saturation disappears when the turbulence exceeds a certain level, absolute growth occurring instead.Keywords
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