期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 17, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.175002
关键词
-
资金
- U.S. Department of Energy, Office of Science, Fusion Energy Sciences [DE-FG02-89ER53291]
The physical causes for the strong stabilizing effect of finite plasma beta on ion-temperature-gradientdriven 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 beta range.
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