Beta-induced Alfven-acoustic eigenmodes in National Spherical Torus Experiment and DIII-D driven by beam ions

被引：78

作者：

Gorelenkov, N. N. ^{[1
]}

Van Zeeland, M. A. ^{[2
]}

Berk, H. L. ^{[3
]}

Crocker, N. A. ^{[4
]}

Darrow, D. ^{[1
]}

Fredrickson, E. ^{[1
]}

Fu, G. -Y. ^{[1
]}

Heidbrink, W. W. ^{[5
]}

Menard, J. ^{[1
]}

Nazikian, R. ^{[1
]}

机构：

[1] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[2] Gen Atom Co, San Diego, CA 92186 USA

[3] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA

[4] Univ Calif Los Angeles, Inst Plasma & Fus Res, Los Angeles, CA 90095 USA

[5] Univ Calif Irvine, Irvine, CA 92697 USA

来源：

PHYSICS OF PLASMAS | 2009年 / 16卷 / 05期

关键词：

dispersion relations; eigenvalues and eigenfunctions; plasma Alfven waves; plasma instability; plasma kinetic theory; plasma toroidal confinement; Tokamak devices; TOROIDAL PLASMAS; D TOKAMAK; KINETIC-THEORY; MODES; INSTABILITIES; PREDICTIONS; WAVES; FLOWS; JET;

D O I：

10.1063/1.3097920

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：

Kinetic theory and experimental observations of a special class of energetic particle driven instabilities called here beta-induced Alfven-acoustic eigenmodes (BAAEs) are reported confirming, previous results [N. N. Gorelenkov , Plasma Phys. Controlled Fusion 49, B371 (2007)]. The kinetic theory is based on the ballooning dispersion relation where the drift frequency effects are retained. BAAE gaps are recovered in kinetic theory. It is shown that the observed certain low-frequency instabilities on DIII-D [J. L. Luxon, Nucl. Fusion 42, 614 (2002)] and National Spherical Torus Experiment [M. Ono, S. M. Kaye, Y.-K. M. Peng , Nucl. Fusion 40, 557 (2000)] are consistent with their identification as BAAEs. BAAEs deteriorate the fast ion confinement in DIII-D and can have a similar effect in next-step fusion plasmas, especially if excited together with multiple global toroidicity-induced shear Alfven eigenmode instabilities. BAAEs can also be used to diagnose safety factor profiles, a technique known as magnetohydrodynamic spectroscopy.

引用

页数：9

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