Generation and stability of zonal flows in ion-temperature-gradient mode turbulence

被引：219
|
作者：
Rogers, BN [1 ]
Dorland, W
Kotschenreuther, M
机构：
[1] Univ Maryland, Inst Plasma Res, College Pk, MD 20742 USA
[2] Univ Texas, Inst Fus Studies, Austin, TX 78704 USA
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 25期
关键词：
D O I：
10.1103/PhysRevLett.85.5336
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We address the mechanisms underlying zonal Row generation and stability in turbulent systems driven by the electrostatic ion-temperature-gradient (ITG) mode. In the case of zonal flow stability, we show the poloidal flows typical of numerical simulations become unstable when they exceed a critical level. Near marginal stability of the linear ITC mode, the system can generate zonal Rows that are sufficiently weak to remain stable and sufficiently strong to suppress the Linear ITG mode. This stable region corresponds to the parameter regime of the nonlinear Dimits up-shift.
引用
收藏
页码：5336 / 5339
页数：4
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