Estimation of magnetic island width by the fluctuations of electron cyclotron emission radiometer on J-TEXT

Bowen RUAN (阮博文); Zhoujun YANG (杨州军); Xiaoming PAN (潘晓明); Hao ZHOU (周豪); Fengqi CHANG (常风岐); Jing ZHOU (周静)

doi:10.1088/2058-6272/aae382

Plasma Science and Technology > 2019 > 21(1): 15102-015102. > DOI: 10.1088/2058-6272/aae382

Bowen RUAN (阮博文), Zhoujun YANG (杨州军), Xiaoming PAN (潘晓明), Hao ZHOU (周豪), Fengqi CHANG (常风岐), Jing ZHOU (周静). Estimation of magnetic island width by the fluctuations of electron cyclotron emission radiometer on J-TEXT[J]. Plasma Science and Technology, 2019, 21(1): 15102-015102. DOI: 10.1088/2058-6272/aae382

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Estimation of magnetic island width by the fluctuations of electron cyclotron emission radiometer on J-TEXT

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

Funds: This work is supported by the National Magnetic Confinement Fusion Program of China (Nos. 2015GB120003 and 2014GB108001).

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Received Date: June 13, 2018

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Abstract

Abstract

The width of a magnetic island is an important parameter for the quantitative analysis of magnetohydrodynamic-related physics. An electron cyclotron emission radiometer (ECE) is a powerful tool that can be used to obtain this width, which can usually be determined from the flat temperature distribution at the O-point phase or the maxima temperature perturbation. An improved method to estimate the width of a magnetic island is proposed in this paper, and it is independent of calibration. With this method and the existing 24-channel ECE system, the width of a rotation magnetic island can be estimated. Additionally, by filtering the fluctuation ECE signal, the evolution of the magnetic island can be obtained. The results of this method are consistent with those of the integrated magnetic probe signals, which represent the relative change of the magnetic island.
- magnetic island width,
- ECE,
- relative temperature perturbation,
- J-TEXT tokamak

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References (13)

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