Study of the spectrum effect on the threshold of resonant magnetic perturbation penetration on J-TEXT

Feiyue MAO; Nengchao WANG; Zhuo HUANG; Zhengkang REN; Song ZHOU; Chengshuo SHEN; Xiaoyi ZHANG; Ying HE; Qi ZHANG; Ruo JIA; Chuanxu ZHAO; Yangbo LI; Bo HU; Da LI; Abba Alhaji BALA; Zhipeng CHEN; Zhongyong CHEN; Zhoujun YANG; Yunfeng LIANG; Yonghua DING; Yuan PAN; J-TEXT Team

doi:10.1088/2058-6272/ac9f2e

Plasma Science and Technology > 2022 > 24(12): 124002. > DOI: 10.1088/2058-6272/ac9f2e

Feiyue MAO, Nengchao WANG, Zhuo HUANG, Zhengkang REN, Song ZHOU, Chengshuo SHEN, Xiaoyi ZHANG, Ying HE, Qi ZHANG, Ruo JIA, Chuanxu ZHAO, Yangbo LI, Bo HU, Da LI, Abba Alhaji BALA, Zhipeng CHEN, Zhongyong CHEN, Zhoujun YANG, Yunfeng LIANG, Yonghua DING, Yuan PAN, J-TEXT Team. Study of the spectrum effect on the threshold of resonant magnetic perturbation penetration on J-TEXT[J]. Plasma Science and Technology, 2022, 24(12): 124002. DOI: 10.1088/2058-6272/ac9f2e

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Study of the spectrum effect on the threshold of resonant magnetic perturbation penetration on J-TEXT

1.
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 Technology, Wuhan 430074, People's Republic of China
2.
College of Computer Science, South-Central Minzu University, Wuhan 430074, People's Republic of China
3.
Physics Department, Federal University Dutse, Dutse 720101, Jigawa, Nigeria
4.
Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung–Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Jülich 52425, Germany
5.
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China

More Information

Corresponding author:
Nengchao WANG, E-mail: wangnc@hust.edu.cn
⁶ See N Wang et al 2022 Advances in physics and applications of 3D magnetic perturbations on the J-TEXT tokamak, Nucl. Fusion 62 042016.
Received Date: August 14, 2022
Revised Date: October 30, 2022
Accepted Date: October 31, 2022
Available Online: December 05, 2023
Published Date: November 28, 2022

Graphical Abstract

Abstract

Abstract

The spectrum effect on the penetration of resonant magnetic perturbation (RMP) is studied with upgraded in-vessel RMP coils on J-TEXT. The poloidal spectrum of the RMP field, especially the amplitudes of 2/1 and 3/1 components, can be varied by the phase difference between the upper and lower coil rows, ∆ϕ = ϕ_top-ϕ_bottom, where ϕ_top and ϕ_bottom are the toroidal phases of the n = 1 field of each coil row. The type of RMP penetration is found to be related to ∆ϕ, including the RMP penetration of either 2/1 or 3/1 RMP and the successive penetrations of 3/1 RMP followed by the 2/1 RMP. For cases with penetration of only one RMP component, the penetration thresholds measured by the corresponding resonant component are close for various ∆ϕ. However, the 2/1 RMP penetration threshold is significantly reduced if the 3/1 locked island is formed in advance. The changes in the rotation profile due to 3/1 locked island formation could partially contribute to the reduction of the 2/1 thresholds.
- tokamak,
- error field,
- resonant magnetic perturbation,
- mode penetration,
- spectrum analysis

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Acknowledgments

This work was supported by the National Magnetic Confinement Fusion Energy R & D Program of China (Nos. 2019YFE03010004, 2018YFE0309100), the National Key R & D Program of China (No. 2017YFE0301100) and National Natural Science Foundation of China (Nos. 11905078, 12075096 and 51821005).

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