The magnetic diagnostic of Mirnov probe arrays has been upgraded on the J-TEXT tokamak to measure the magnetohydrodynamic instabilities with higher spatial resolution and better amplitude-frequency characteristics. The upgraded Mirnov probe array contains one poloidal array with 48 probe modules and two toroidal arrays with 25 probe modules. Each probe module contains two probes which measure both the poloidal and the radial magnetic fields (Bp and Br). To ensure that the Mirnov probe possess better amplitude-frequency characteristics, a novel kind of Mirnov probe made of low temperature co-fired ceramics is utilized. The parameters and frequency response of the probe are measured and can meet the experiment requirement. The new Mirnov arrays have been normally applied for a round of experiments, including the observation of tearing modes and their coupling as well as high frequency magnetic perturbation due to the Alfvén eigenmode. In order to extract useful information from raw signals, visualization processing methods based on singular value decomposition and cross-power spectrum are applied to decompose the coupled modes and to determine the mode number.
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December 2017
Research Article|
December 04 2017
Upgrade of the Mirnov probe arrays on the J-TEXT tokamak
Daojing Guo;
Daojing Guo
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Qiming Hu
;
Qiming Hu
a)
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Da Li;
Da Li
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Chengshuo Shen;
Chengshuo Shen
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Nengchao Wang
;
Nengchao Wang
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Zhuo Huang;
Zhuo Huang
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Mingxiang Huang;
Mingxiang Huang
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Yonghua Ding
;
Yonghua Ding
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Guo Xu;
Guo Xu
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Qingquan Yu;
Qingquan Yu
2
Max-Planck-Institut für Plasmaphysik
, 85748 Garching, Germany
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Yuejin Tang;
Yuejin Tang
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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Ge Zhuang
Ge Zhuang
1
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, and School of Electrical and Electronic Engineering, Huazhong University of Science and Technology
, Wuhan 430074, China
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a)
Author to whom correspondence should be addressed: huqm@hust.edu.cn.
Rev. Sci. Instrum. 88, 123502 (2017)
Article history
Received:
July 16 2017
Accepted:
November 02 2017
Citation
Daojing Guo, Qiming Hu, Da Li, Chengshuo Shen, Nengchao Wang, Zhuo Huang, Mingxiang Huang, Yonghua Ding, Guo Xu, Qingquan Yu, Yuejin Tang, Ge Zhuang; Upgrade of the Mirnov probe arrays on the J-TEXT tokamak. Rev. Sci. Instrum. 1 December 2017; 88 (12): 123502. https://doi.org/10.1063/1.4996360
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