Comparison of MHD-induced rotation damping with NTV predictions on MAST

被引:47
作者
Hua, M-D [1 ,2 ]
Chapman, I. T. [2 ]
Field, A. R. [2 ]
Hastie, R. J. [2 ]
Pinches, S. D. [2 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, London SW7 2BY, England
[2] EURATOM, CCFE Fus Assoc, Culham Sci Ctr, Abingdon OX14 3DB, Oxon, England
基金
英国工程与自然科学研究理事会;
关键词
INTERNAL KINK MODE; TOROIDAL-MOMENTUM DISSIPATION; RESISTIVE WALL MODE; BETA NSTX PLASMAS; DIII-D; TOKAMAK PLASMAS; BALLOONING MODES; TEARING MODES; STABILIZATION; STABILITY;
D O I
10.1088/0741-3335/52/3/035009
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
Plasma rotation in tokamaks is of special interest for its potential stabilizing effect on micro-and macro-instabilities, leading to increased confinement. In MAST, the torque from neutral beam injection can spin the plasma to a core velocity similar to 300 km s(-1) (Alfven Mach number similar to 0.3). Low density plasmas often exhibit a weakly non-monotonic safety factor profile just above unity. Theory predicts that such equilibria are prone to magneto-hydro-dynamic (MHD) instabilities, which was confirmed by recent observations. The appearance of the mode is accompanied by strong damping of core rotation on a timescale much faster than the momentum confinement time. The mode's saturated structure is estimated using the CASTOR code together with soft x-ray measurements, enabling the calculation of the plasma braking by the MHD mode according to neoclassical toroidal viscosity (NTV) theory. The latter exhibits strong similarities with the torque measured experimentally.
引用
收藏
页数:20
相关论文
共 62 条
[1]   NONLINEAR STATE OF M=1 INSTABILITY IN TOKAMAKS WITH NONMONOTONIC Q PROFILES [J].
AVINASH ;
HASTIE, RJ ;
TAYLOR, JB ;
COWLEY, SC .
PHYSICAL REVIEW LETTERS, 1987, 59 (23) :2647-2649
[2]   The technology and science of steady-state operation in magnetically confined plasmas [J].
Becoulet, A. ;
Hoang, G. T. .
PLASMA PHYSICS AND CONTROLLED FUSION, 2008, 50 (12)
[3]   DIFFUSION DRIVEN PLASMA CURRENTS AND BOOTSTRAP TOKAMAK [J].
BICKERTON, RJ ;
CONNOR, JW ;
TAYLOR, JB .
NATURE-PHYSICAL SCIENCE, 1971, 229 (04) :110-+
[4]   STABILIZATION OF EXTERNAL-MODES IN TOKAMAKS BY RESISTIVE WALLS AND PLASMA ROTATION [J].
BONDESON, A ;
WARD, DJ .
PHYSICAL REVIEW LETTERS, 1994, 72 (17) :2709-2712
[5]  
BURATTI P, 2008, 35 EPS C PLASM PHYS
[6]  
BURATTI P, 2009, 36 EPS C PLASM PHYS
[7]   The effect of toroidal plasma rotation on sawteeth in MAST [J].
Chapman, I. T. ;
Hender, T. C. ;
Saarelma, S. ;
Sharapov, S. E. ;
Akers, R. J. ;
Conway, N. J. .
NUCLEAR FUSION, 2006, 46 (12) :1009-1016
[8]   Sawtooth stability in neutral beam heated plasmas in TEXTOR [J].
Chapman, I. T. ;
Pinches, S. D. ;
Koslowski, H. R. ;
Liang, Y. ;
Kraemer-Flecken, A. ;
de Bock, M. .
NUCLEAR FUSION, 2008, 48 (03)
[9]   Sawtooth control and the interaction of energetic particles [J].
Chapman, I. T. ;
Igochine, V. G. ;
Graves, J. P. ;
Pinches, S. D. ;
Gude, A. ;
Jenkins, I. ;
Maraschek, M. ;
Tardini, G. .
NUCLEAR FUSION, 2009, 49 (03)
[10]  
CHAPMAN IT, 2010, NUCL FUSION IN PRESS, V50