Low-frequency Alfven gap modes in rotating tokamak plasmas

被引：4
|
作者：
Haverkort, J. W. [1 ,2 ]
de Blank, H. J. [1 ]
Koren, B. [2 ,3 ]
机构：
[1] EURATOM, FOM Inst Plasma Phys Rijnhuizen, Nieuwegein, Netherlands
[2] CWI, Amsterdam, Netherlands
[3] Leiden Univ, Math Inst, NL-2300 RA Leiden, Netherlands
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2011年 / 53卷 / 04期
关键词：
MHD SPECTROSCOPY; TOROIDAL PLASMAS; GLOBAL MODES; EIGENMODES; WAVES; EXCITATION; EQUILIBRIA; SPECTRUM; SYSTEMS; FLOWS;
D O I：
10.1088/0741-3335/53/4/045004
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：
As a result of toroidal rotation, sequences of new global modes are predicted to arise in magnetically confined plasmas. The frequencies of these Alfven modes lie inside gaps of the continuous magnetohydrodynamic (MHD) spectrum that are created or enlarged by toroidal flow. The numerically obtained results are compared with an analytical investigation, yielding a useful criterion for mode existence. Because of their low frequencies, these modes may be easily destabilized by energetic particles. Because of their sensitivity to the Mach number however, these modes can provide a valuable extension to MHD spectroscopy by giving information on the rotational velocity.
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页数：10
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