Stabilization of kink/peeling modes by coupled rotation and ion diamagnetic drift effects in quiescent H-mode plasmas in DIII-D and JT-60U

被引：3

作者：

Aiba, N. ^{[1
]}

Chen, X. ^{[2
]}

Kamiya, K. ^{[1
,4
]}

Honda, M. ^{[1
]}

Osborne, T. H. ^{[2
]}

Burrell, K. H. ^{[2
]}

Snyder, P. B. ^{[2
,3
]}

机构：

[1] Natl Inst Quantum Sci & Technol, Naka, Ibaraki 3110193, Japan

[2] Gen Atom, POB 85608, San Diego, CA 92186 USA

[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[4] Kyoto Univ, Grad Sch Engn, Kyoto, Kyoto 6158530, Japan

来源：

NUCLEAR FUSION | 2021年 / 61卷 / 12期

关键词：

quiescent H-mode; extended MHD model; linear stability; rotation; STABILITY; EQUILIBRIUM; DYNAMICS; REGIME;

D O I：

10.1088/1741-4326/ac318e

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：

Magnetohydrodynamic stability at the edge pedestal in several quiescent H-mode (QH-mode) plasmas in DIII-D and JT-60U experiments was analyzed by considering plasma rotation and ion diamagnetic drift effects. It was identified that a kink/peeling mode, which is a prime candidate for a trigger of edge harmonic oscillation in QH-mode, is stabilized by plasma rotation when considering the ion diamagnetic drift simultaneously in both experiments. The stabilizing effect by rotation becomes more effective in case using the rotation profile of the main ion species evaluated by assuming radial force balance. In addition, when inverting the rotation direction, it was found that the kink/peeling mode is more stabilized when considering the rotation of the main ion species, though the mode is less stabilized by the rotation of impurity ion species. The result implies that the kink/peeling mode stability in QH-mode plasmas is sensitive to how the rotation profile is evaluated, but it is shown that a qualitative trend stabilizing the kink/peeling mode by rotation can be reproduced with the poloidal rotation profile of an impurity predicted numerically based on the neoclassical theory.

引用

页数：12

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