The role of magnetic shear for zonal flow generation

被引：9
作者：
Anderson, J. [1 ]
Nordman, H.
机构：
[1] Kyoto Univ, Grad Sch Energy Sci, Dept Fundamental Energy Sci, Kyoto 6110011, Japan
[2] Chalmers, EURATOM VR Assoc Chalmers, Dept Radio & Space Sci, S-41296 Gothenburg, Sweden
来源：
JOURNAL OF PLASMA PHYSICS | 2006年 / 72卷
关键词：
D O I：
10.1017/S002237780600479X
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The role of magnetic shear for zonal flow generation by ion temperature gradient and trapped electron (TE) mode turbulence is studied analytically using fluid descriptions. The sealing of the zonal flow (ZF) growth rate with magnetic shear is examined and compared with linear growth rates for typical tokamak parameter values. The results indicate that large levels of ZF are obtained in regions of negative magnetic shear, especially for ZF driven by TE mode turbulence. The strong magnetic shear scaling obtained for TE-mode-driven ZFs originates from the bounce average of the electron magnetic drifts.
引用
收藏
页码：609 / 615
页数：7
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