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

doi:10.1088/1674-1056/ad1e6b

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.

Keywords: plasma responses drift-MHD model error field penetration

Received: 28 November 2023
Revised: 27 December 2023
Accepted manuscript online: 15 January 2024

PACS:	52.55.Fa	(Tokamaks, spherical tokamaks)
	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))

Fund: 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).

Corresponding Authors: Tao Xu
E-mail: xutao@hust.edu.cn

Cite this article:

Wen Wang(王文), Tao Xu(徐涛), Yi Zhang(张仪), and the J-TEXT team Error field penetration in J-TEXT tokamak based on two-fluid drift-MHD model 2024 Chin. Phys. B 33 045202

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

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