Toroidal velocity shear Kelvin-Helmholtz instabilities in strongly rotating tokamak plasmas

被引：23
|
作者：
Chapman, I. T. [1 ]
Brown, S. [1 ]
Kemp, R. [1 ]
Walkden, N. R. [1 ,2 ]
机构：
[1] EURATOM CCFE Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
[2] Univ Bath, Dept Phys, Bath BA2 7AY, Avon, England
来源：
NUCLEAR FUSION | 2012年 / 52卷 / 04期
基金：
英国工程与自然科学研究理事会;
关键词：
SPHERICAL TOKAMAK; MAGNETIC FIELD; STABILITY; JETS;
D O I：
10.1088/0029-5515/52/4/042005
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：
Strong sheared toroidal flows are predicted to drive parallel velocity shear Kelvin-Helmholtz oscillations unstable in spherical tokamak plasmas. Numerical simulations that include rotation in the equilibrium suggest that future spherical tokamaks will have an upper limit in uni-directional injected neutral beam heating in order to keep the sheared toroidal rotation below the critical level for the onset of the global parallel velocity shear Kelvin-Helmholtz instability.
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页数：4
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