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
相关论文
共 50 条
  • [21] THE NONLINEAR DEVELOPMENT OF DISTURBANCES IN A ZONAL SHEAR-FLOW
    CHURILOV, SM
    SHUKHMAN, IG
    GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS, 1987, 38 (03): : 145 - 175
  • [22] Magnetic islands and spontaneous generation of zonal flows
    Grasso, D.
    Margheriti, L.
    Porcelli, F.
    Tebaldi, C.
    PLASMA PHYSICS AND CONTROLLED FUSION, 2006, 48 (09) : L87 - L95
  • [23] Zonal flow and streamer generation in drift turbulence
    Manfredi, G
    Roach, CM
    Dendy, RO
    PLASMA PHYSICS AND CONTROLLED FUSION, 2001, 43 (06) : 825 - 837
  • [24] Zonal flow generation by the stretching of Rossby modons
    Jovanovic, D.
    Shukla, P. K.
    PHYSICS LETTERS A, 2010, 374 (19-20) : 2048 - 2052
  • [25] Zonal flow generation in the improved confinement mode plasma and its role in confinement bifurcations
    Shats, MG
    Solomon, WM
    NEW JOURNAL OF PHYSICS, 2002, 4 : 30.1 - 30.14
  • [26] Anisotropic electrostatic turbulence and zonal flow generation
    Balescu, R
    Petrisor, I
    Negrea, M
    PLASMA PHYSICS AND CONTROLLED FUSION, 2005, 47 (12) : 2145 - 2159
  • [27] Shocks in unmagnetized plasma with a shear flow: Stability and magnetic field generation
    Dieckmann, M. E.
    Bock, A.
    Ahmed, H.
    Doria, D.
    Sarri, G.
    Ynnerman, A.
    Borghesi, M.
    PHYSICS OF PLASMAS, 2015, 22 (07)
  • [28] Baroclinic Instability of a Time-Dependent Zonal Shear Flow
    Guo, Chengzhen
    Song, Jian
    ATMOSPHERE, 2022, 13 (07)
  • [29] Role of parallel compression in potential vorticity mixing and zonal flow generation: a gyrokinetic simulation study
    Yi, Sumin
    Jhang, Hogun
    Kwon, Jae-Min
    Kim, S. S.
    NUCLEAR FUSION, 2019, 59 (04)
  • [30] In-out asymmetry of zonal flow shear and turbulence reduction
    Cho, Y. W.
    Yi, Sumin
    Kwon, J. M.
    Hahm, T. S.
    PHYSICS OF PLASMAS, 2016, 23 (10)
12345