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
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
相关论文
共 26 条
[1]   Zonal flow generation in collisionless trapped electron mode turbulence [J].
Anderson, J. ;
Nordman, H. ;
Singh, R. ;
Weiland, J. .
PLASMA PHYSICS AND CONTROLLED FUSION, 2006, 48 (05) :651-661
[2]   Zonal flow generation in ion temperature gradient mode turbulence [J].
Anderson, J ;
Nordman, H ;
Singh, R ;
Weiland, J .
PHYSICS OF PLASMAS, 2002, 9 (11) :4500-4506
[3]  
Beer M. A., 1995, Gyrofluid models of turbulent transport in tokamaks
[4]   Poloidal rotation in TFTR reversed shear plasmas [J].
Bell, RE ;
Levinton, FM ;
Batha, SH ;
Synakowski, EJ ;
Zarnstorff, MC .
PHYSICAL REVIEW LETTERS, 1998, 81 (07) :1429-1432
[5]   INFLUENCE OF SHEARED POLOIDAL ROTATION ON EDGE TURBULENCE [J].
BIGLARI, H ;
DIAMOND, PH ;
TERRY, PW .
PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1990, 2 (01) :1-4
[6]   Excitation of zonal flow by drift waves in toroidal plasmas [J].
Chen, L ;
Lin, ZH ;
White, R .
PHYSICS OF PLASMAS, 2000, 7 (08) :3129-3132
[7]   Gyrokinetic simulation of collisionless trapped-electron mode turbulence [J].
Dannert, T ;
Jenko, F .
PHYSICS OF PLASMAS, 2005, 12 (07) :1-8
[8]   Zonal flows in plasma - a review [J].
Diamond, PH ;
Itoh, SI ;
Itoh, K ;
Hahm, TS .
PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (05) :R35-R161
[9]  
DIAMOND PH, 1991, PHYS FLUIDS B-PLASMA, V5, P2343
[10]   Scalings of ion-temperature-gradient-driven anomalous transport in tokamaks [J].
Dimits, AM ;
Williams, TJ ;
Byers, JA ;
Cohen, BI .
PHYSICAL REVIEW LETTERS, 1996, 77 (01) :71-74