中国物理B ›› 2024, Vol. 33 ›› Issue (4): 45202-045202.doi: 10.1088/1674-1056/ad1e6b

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Error field penetration in J-TEXT tokamak based on two-fluid drift-MHD model

Wen Wang(王文), Tao Xu(徐涛)†, Yi Zhang(张仪), and the J-TEXT team   

  1. State Key Laboratory of Advanced Electromagnetic Technology, International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2023-11-28 修回日期:2023-12-27 接受日期:2024-01-15 出版日期:2024-03-19 发布日期:2024-03-27
  • 通讯作者: Tao Xu E-mail:xutao@hust.edu.cn
  • 基金资助:
    The authors are grateful for help of J-TEXT team. The authors are grateful to Professor R. Fitzpatrick for helpful suggestions and the support of program LAYER. Project supported by the National Natural Science Foundation of China (Grant No. 51821005).

Error field penetration in J-TEXT tokamak based on two-fluid drift-MHD model

Wen Wang(王文), Tao Xu(徐涛)†, Yi Zhang(张仪), and the J-TEXT team   

  1. State Key Laboratory of Advanced Electromagnetic Technology, International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2023-11-28 Revised:2023-12-27 Accepted:2024-01-15 Online:2024-03-19 Published:2024-03-27
  • Contact: Tao Xu E-mail:xutao@hust.edu.cn
  • Supported by:
    The authors are grateful for help of J-TEXT team. The authors are grateful to Professor R. Fitzpatrick for helpful suggestions and the support of program LAYER. Project supported by the National Natural Science Foundation of China (Grant No. 51821005).

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摘要： An externally generated resonant magnetic perturbation can induce complex non-ideal MHD responses in their resonant surfaces. We have studied the plasma responses using Fitzpatrick's improved two-fluid model and program LAYER. We calculated the error field penetration threshold for J-TEXT. In addition, we find that the island width increases slightly as the error field amplitude increases when the error field amplitude is below the critical penetration value. However, the island width suddenly jumps to a large value because the shielding effect of the plasma against the error field disappears after the penetration. By scanning the natural mode frequency, we find that the shielding effect of the plasma decreases as the natural mode frequency decreases. Finally, we obtain the m/n=2/1 penetration threshold scaling on density and temperature.

关键词: plasma responses, drift-MHD model, error field penetration

Abstract: An externally generated resonant magnetic perturbation can induce complex non-ideal MHD responses in their resonant surfaces. We have studied the plasma responses using Fitzpatrick's improved two-fluid model and program LAYER. We calculated the error field penetration threshold for J-TEXT. In addition, we find that the island width increases slightly as the error field amplitude increases when the error field amplitude is below the critical penetration value. However, the island width suddenly jumps to a large value because the shielding effect of the plasma against the error field disappears after the penetration. By scanning the natural mode frequency, we find that the shielding effect of the plasma decreases as the natural mode frequency decreases. Finally, we obtain the m/n=2/1 penetration threshold scaling on density and temperature.

Key words: plasma responses, drift-MHD model, error field penetration

中图分类号:  (Tokamaks, spherical tokamaks)

  • 52.55.Fa
52.65.-y (Plasma simulation) 52.35.Py (Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.)) 52.30.Cv (Magnetohydrodynamics (including electron magnetohydrodynamics))