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

Citation:

PDF (1256 KB)

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).

More Information

Received Date: June 13, 2018

Graphical Abstract

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

FullText(HTML)

References (13)

References

[1]	Igochine V 2015 Active Control of Magneto-Hydrodynamic Instabilities in Hot Plasmas (Berlin: Springer)
[2]	Kobuchi T et al 2008 J. Phys. Conf. Ser. 123 012021
[3]	Fonseca A M M et al 2005 IEEE Trans Plasma Sci. 33 2046
[4]	Han X et al 2013 Plasma Sci. Technol. 15 217
[5]	Igochine V et al 2017 Nucl. Fusion 57 036015
[6]	Igochine V et al 2014 Phys. Plasmas 21 603
[7]	Zhuang G et al 2011 Nucl. Fusion 51 094020
[8]	Yang Z J et al 2012 Rev. Sci. Instrum. 83 10E313
[9]	Yang Z J et al 2016 Rev. Sci. Instrum. 87 11E112
[10]	Shi Z B et al 2014 Rev. Sci. Instrum. 85 023510
[11]	Huang X L et al 2011 Nucl. Fusion Plasma Phys. 31 193 (in Chinese)
[12]	Fitzpatrick R 1995 Phys. Plasmas 2 825
[13]	Meskat J P et al 2001 Plasma Phys. Control. Fusion 43 1325

[1]	Bing QI (齐冰), Chunxu QIN (秦春旭), Haikun SHANG (尚海昆), Li XIONG (熊莉). Measurement of He₂* density with an auxiliary measuring electrode in atmospheric pressure plasma jet[J]. Plasma Science and Technology, 2019, 21(8): 85402-085402. DOI: 10.1088/2058-6272/ab15a1
[2]	Muhammad Ajmal KHAN, Jing LI (李静), Heping LI (李和平), Hafiz Imran Ahmad QAZI. Characteristics of a radio-frequency cold atmospheric plasma jet produced with a hybrid cross-linear-field electrode configuration[J]. Plasma Science and Technology, 2019, 21(5): 55401-055401. DOI: 10.1088/2058-6272/ab004b
[3]	Wenjia WANG (王文家), Deng ZHOU (周登), Yue MING (明玥). The residual zonal flow in tokamak plasmas with a poloidal electric field[J]. Plasma Science and Technology, 2019, 21(1): 15101-015101. DOI: 10.1088/2058-6272/aadd8e
[4]	Jia TIAN (田甲), Wenzheng LIU (刘文正), Weisheng CUI (崔伟胜), Yongjie GAO (高永杰). Generation characteristics of a metal ion plasma jet in vacuum discharge[J]. Plasma Science and Technology, 2018, 20(8): 85403-085403. DOI: 10.1088/2058-6272/aabedf
[5]	Carlo POGGI, Théo GUILLAUME, Fabrice DOVEIL, Laurence CHÉRIGIER-KOVACIC. Estimation of the Lyman-α signal of the EFILE diagnostic under static or radiofrequency electric field in vacuum[J]. Plasma Science and Technology, 2018, 20(7): 74001-074001. DOI: 10.1088/2058-6272/aabde3
[6]	Haixin HU (胡海欣), Feng HE (何锋), Ping ZHU (朱平), Jiting OUYANG (欧阳吉庭). Numerical study of the influence of dielectric tube on propagation of atmospheric pressure plasma jet based on coplanar dielectric barrier discharge[J]. Plasma Science and Technology, 2018, 20(5): 54010-054010. DOI: 10.1088/2058-6272/aaaad9
[7]	LIU Wenzheng(刘文正), WANG Hao(王浩), DOU Zhijun(窦志军). Impact of the Insulator on the Electric Field and Generation Characteristics of Vacuum Arc Metal Plasmas[J]. Plasma Science and Technology, 2014, 16(2): 134-141. DOI: 10.1088/1009-0630/16/2/09
[8]	HONG Yi (洪义), LU Na (鲁娜), PAN Jing (潘静), LI Jie (李杰), WU Yan (吴彦). Discharge Characteristics of an Atmospheric Pressure Argon Plasma Jet Generated with Screw Ring-Ring Electrodes in Surface Dielectric Barrier Discharge[J]. Plasma Science and Technology, 2013, 15(8): 780-786. DOI: 10.1088/1009-0630/15/8/12
[9]	LV Xiaogui (吕晓桂), REN Chunsheng (任春生), MA Tengcai (马腾才), Feng Yan (冯岩), WANG Dezhen (王德真). An Atmospheric Large-Scale Cold Plasma Jet[J]. Plasma Science and Technology, 2012, 14(9): 799-801. DOI: 10.1088/1009-0630/14/9/05
[10]	FEI Xiaomeng(费小猛), Shin-ichi KURODA, Yuki KONDO, Tamio MORI, Katsuhiko HOSOI. Influence of Additive Gas on Electrical and Optical Characteristics of Non- equilibrium Atmospheric Pressure Argon Plasma Jet[J]. Plasma Science and Technology, 2011, 13(5): 575-582.