共 12 条
Transport control by coherent zonal flows in the core/edge transitional regime
被引:203
作者:
Hallatschek, K
[1
]
Biskamp, D
[1
]
机构:
[1] IPP Assoc, EURATOM, Max Planck Inst Plasmaphys, Ctr Interdisciplinary Plasma Sci, D-85748 Garching, Germany
关键词:
D O I:
10.1103/PhysRevLett.86.1223
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
3D Braginskii turbulence simulations show that the energy flux in the core/edge transition region of a tokamak is strongly modulated-locally and on average-by radially propagating, nearly coherent sinusoidal or solitary zonal flows. Their primary drive is the anomalous transport together with the Stringer-Winsor term. The transport modulation and the flow excitation are due to wave-kinetic effects studied for the first time in turbulence simulations. The flow amplitudes and the transport sensitively depend on the magnetic curvature acting on the flows, which can be influenced, e.g., by shaping the plasma cross section.
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页码:1223 / 1226
页数:4
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