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Ballooning theory for micro-tearing mode in tokamak
被引:0
|作者:
Xie, T.
[1
,2
]
Mahajan, S. M.
[1
]
Hatch, D. R.
[1
]
机构:
[1] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA
[2] Sichuan Univ Sci & Engn, Dept Phys, Zigong 643000, Sichuan, Peoples R China
基金:
中国国家自然科学基金;
美国能源部;
关键词:
KINETIC-THEORY;
MICROTEARING MODES;
STABILITY;
D O I:
10.1063/5.0157408
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:
This paper aims to investigate the impact of magnetic drift on the linear micro-tearing mode by using a kinetic approach to derive a reduced two-field eigen system in real space. Since the magnetic drift in real space has derivatives, it is more efficient to solve the mode equations in a Fourier-ballooning representation using the two-dimensional (2D) ballooning transform. The lowest-order eigen system in the Fourier-ballooning representation consists of two integral equations, which are numerically solved using the finite difference method for both eigenvalues and wave functions. The main results will be presented through graphical eigenvalue scans for each parameter. Furthermore, we present a graphical comparison between the predictions of the ballooning theory and GENE gyrokinetic code simulation in the pedestal region.
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页数:11
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