Nonlinear Electromagnetic Stabilization of Plasma Microturbulence.
Phys Rev Lett
; 120(17): 175002, 2018 Apr 27.
Article
em En
| MEDLINE
| ID: mdl-29756837
ABSTRACT
The physical causes for the strong stabilizing effect of finite plasma ß on ion-temperature-gradient-driven turbulence, which far exceeds quasilinear estimates, are identified from nonlinear gyrokinetic simulations. The primary contribution stems from a resonance of frequencies in the dominant nonlinear interaction between the unstable mode, the stable mode, and zonal flows, which maximizes the triplet correlation time and therefore the energy transfer efficiency. A modification to mixing-length transport estimates is constructed, which reproduces nonlinear heat fluxes throughout the examined ß range.
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MEDLINE
Idioma:
En
Ano de publicação:
2018
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Article