Interactions of toroidally coupled tearing modes in the KSTAR tokamak

被引：11
|
作者：
Kim, Gnan [1 ]
Yun, Gunsu S. [1 ]
Woo, Minho [2 ]
Park, Hyeon K. [2 ,3 ]
机构：
[1] Pohang Univ Sci & Technol, Pohang 37673, South Korea
[2] Natl Fus Res Inst, Daejeon 34133, South Korea
[3] Ulsan Natl Inst Sci & Technol, Ulsan 44919, South Korea
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2018年 / 60卷 / 03期
关键词：
tearing mode; toroidal coupling; competition; magnetic island; MAGNETIC ISLAND; DISRUPTIONS; PLASMAS; PERTURBATIONS; STABILITY; DYNAMICS; SIGNAL;
D O I：
10.1088/1361-6587/aaa2eb
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：
The evolutions of toroidally coupled radially-distant and radially-adjacent tearing modes are visualized in 2D in detail on the Korea superconducting tokamak for advanced research. The coupled tearing modes are in-phase on the out-board mid-plane and become destabilized or compete with each other depending on their spatial separation. When two coupled tearing modes are far apart, both are increasingly destabilized. On the other hand, when they become close to each other, one becomes stabilized while the other becomes destabilized. In such cases, an additional tearing mode is often formed on outer rational flux surface and the three tearing modes compete. The competitions suggest that spatial overlap (merging) of coupled magnetic islands is difficult.
引用
收藏
页数：11
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