Development of the saddle loop sensors on the J-TEXT tokamak

Daojing Guo; Qiming Hu; Da Li; Nengchao Wang; Yonghua Ding; Chengshuo Shen; Zhuo Huang; Guo Xu; Qingquan Yu; Yuejin Tang; Ge Zhuang

doi:10.1063/1.4993480

AIP Advances (Oct 2017)

Development of the saddle loop sensors on the J-TEXT tokamak

Daojing Guo,
Qiming Hu,
Da Li,
Nengchao Wang,
Yonghua Ding,
Chengshuo Shen,
Zhuo Huang,
Guo Xu,
Qingquan Yu,
Yuejin Tang,
Ge Zhuang

Affiliations

Daojing Guo: 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
Qiming Hu: 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
Da Li: 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
Nengchao Wang: 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
Yonghua Ding: 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
Chengshuo Shen: 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
Zhuo Huang: 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
Guo Xu: 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
Qingquan Yu: Max-Planck-Institut für Plasmaphysik, 85748 Garching, Germany
Yuejin Tang: 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
Ge Zhuang: 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

DOI: https://doi.org/10.1063/1.4993480
Journal volume & issue: Vol. 7, no. 10
pp. 105002 – 105002-7

Abstract

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To measure the amplitude and phase of the non-axisymmetric radial magnetic field generated by the locked mode, 12 saddle loop sensors are newly developed on the J-TEXT Tokamak. The saddle loop is made of flexible printed circuit (FPC) to adapt the complex installment environment and ensure the installment accuracy. In the experiment, the saddle loop measures the radial magnetic field of locked mode and the axisymmetric equilibrium magnetic fields as well as that of the corresponding eddy current. Precise compensation for the fluxes induced by the horizontal and vertical field coils is realized by utilizing the lumped eddy current circuits based on an analytical model. By using this set of saddle loop sensors, the amplitude and phase of the m/n = 2/1 locked mode are clearly measured for the case of error field locking with slow rotation and the penetration of resonant magnetic perturbations (RMPs) respectively. Here, m and n are the poloidal and toroidal mode number.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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