期刊
PHYSICAL REVIEW LETTERS
卷 116, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.116.085001
关键词
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资金
- U.S. DOE [DE-SC0006103, DE-FG02-99ER54546]
- National Energy Research Scientific Computing Center, a DOE Office of Science User Facility [DE-AC02-05CH11231]
- U.S. Department of Energy (DOE) [DE-SC0006103] Funding Source: U.S. Department of Energy (DOE)
Owing to complex geometry, gyrokinetic simulations in stellarator geometry produce large numbers of subdominant unstable and stable, near-orthogonal eigenmodes. Here, results based on the full eigenmode spectrum in stellarator geometry are presented for the first time. In the nonlinear state of a low-magnetic-shear ion-temperature-gradient-driven case, a multitude of these modes are active and imprint the system. Turbulent frequency spectra are broadband as a consequence, in addition to a nonlinear, narrow signature at electron frequencies. It is shown that successful quasilinear, mixing-length transport modeling is possible in stellarators, where it is essential to account for all subdominant unstable modes.
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