Transition from fishbone mode to β-induced Alfvén eigenmode on HL-2A tokamak

被引：0
|
作者：
邹志慧 [1 ]
朱平 [2 ,3 ]
金智善 [4 ]
王先驱 [5 ]
侯雅巍 [1 ]
机构：
[1] CAS Key Laboratory of Geospace Environment and Department of Plasma Physics and Fusion Engineering,University of Science and Technology of China
[2] International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technol
[3] Department of Engineering Physics,University of Wisconsin-Madison
[4] SLS Consulting
[5] Institute of Fusion Science,School of Physical Science and Technology,Southwest Jiaotong
来源：
Plasma Science and Technology | 2021年 / 09期
关键词：
D O I：
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中图分类号：
TL631.24 [];
学科分类号：
摘要：
In the presence of energetic particles(EPs) from auxiliary heating and burning plasmas, fishbone instability and Alfvén modes can be excited and their transition can take place in certain overlapping regimes. Using the hybrid kinetic-magnetohydrodynamic model in the NIMROD code, we have identified such a transition between the fishbone instability and the β-induced Alfvén eigenmode(BAE) for the NBI heated plasmas on HL-2 A. When the safety factor at magnetic axis is well below one, typical kink-fishbone transition occurs as the EP fraction increases. When q0 is raised to approaching one, the fishbone mode is replaced with BAE for sufficient amount of EPs. When q0 is slightly above one, the toroidicity-induced Alfvén eigenmode dominates at lower EP pressure, whereas BAE dominates at higher EP pressure.
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页码：69 / 77
页数：9
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