Real-Time Detection for Magnetic Island of Neoclassical Tearing Mode in EAST Plasma Control System

LIANG Shaoyong (梁绍勇); XIAO Bingjia (肖炳甲); ZHANG Yang (张洋); WANG Linfang (王淋芳); YUAN Qiping (袁旗平); LUO Zhengping (罗正平); SHI Tonghui (石同辉); TI Ang (提昂)

doi:10.1088/1009-0630/18/2/17

Plasma Science and Technology > 2016 > 18(2): 197-201. > DOI: 10.1088/1009-0630/18/2/17

LIANG Shaoyong (梁绍勇), XIAO Bingjia (肖炳甲), ZHANG Yang (张洋), WANG Linfang (王淋芳), YUAN Qiping (袁旗平), LUO Zhengping (罗正平), SHI Tonghui (石同辉), TI Ang (提昂). Real-Time Detection for Magnetic Island of Neoclassical Tearing Mode in EAST Plasma Control System[J]. Plasma Science and Technology, 2016, 18(2): 197-201. DOI: 10.1088/1009-0630/18/2/17

Citation:

PDF (331 KB)

Real-Time Detection for Magnetic Island of Neoclassical Tearing Mode in EAST Plasma Control System

1Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China 2Collaborative Innovation Centre for Advanced Fusion Energy and Plasma Science, University of Science and Technology of China, Hefei 230026, China

Funds: supported by the National Magnetic Confinement Fusion Science Program of China (Nos. 2014GB103000, 2012GB103000, and2012GB103002), National Natural Science Foundation of China (No. 11205200)

More Information

Received Date: March 16, 2015

Graphical Abstract

Abstract

Abstract

Accurate detection of a magnetic island in real time is one of the important issues for the tearing mode (TM) and neoclassical tearing mode (NTM) control. This paper presents a real-time detection system for the magnetic island of NTM control in the EAST Plasma Control System (PCS). Diagnosis is based on magnetic periodic perturbation and electron temperature fluctuation caused by the magnetic island. Therefore, a Mirnov measurement has been selected to calculate the island’s parameters, such as island width, frequency of island rotation, and toroidal number. The electron cyclotron emission (ECE) system can detect the island position, which is calculated by two fast detection algorithms called correlation analysis and Hilbert transform. For future NTM control, real-time equilibrium reconstruction (rt-EFIT) is needed to locate the rational q-surface where the island is detected. This fast detection system is able to detect an island within 3 ms. It can be integrated into PCS to provide effective parameters of the island for NTM control by using EC resonance heating (ECRH) in the next experiment of EAST.
- real time,
- magnetic island,
- Mirnov,
- ECE,
- phase jump

FullText(HTML)

References (1)

References

1 La Haye R J. 2006, Phys. Plasmas, 13: 055501 2 Prater R, La Haye R J, Luce T C, et al. 2007, Nucl.Fusion, 47: 371 3 Petty C C, La Haye R J, Luce T C, et al. 2004, Nucl.Fusion, 44: 243 4 Kolemen E, Ellis R, La Haye R J, et al. 2013, Fusion Eng. Des., 88: 2757 5 Zohm H, Gantenbein G, Gude A, et al. 2001, Phys.Plasmas, 8: 2009 6 Westerhof E, Lazaros A, Farshi E, et al. 2007, Nucl.Fusion, 47: 85 7 Isayama A, Matsunaga G, Kobayashi T, et al. 2009,Nucl. Fusion, 49: 055006 8 Lee H H, Lee S G, Seol J, et al. 2014, Nucl. Fusion,54: 103008 9 Shi T, Wan B, Shen B, et al. 2013, Plasma Phys. Control. Fusion, 55: 055007 10 Fitzpatrick R. 1995, Phys. Plasmas, 2: 825 11 La Haye R J, Buttery R J, Guenter S, et al. 2000,Phys. Plasmas, 7: 3349 12 Hennen B A, Westerhof E, Nuij P W J M, et al. 2010,Plasma Phys. Control. Fusion, 52: 104006 13 Berrino J, Lazzaro E, Cirant S, et al. 2005, Nucl. Fusion, 45: 1350 14 Oosterbeek J W, Bürger A, Westerhof E, et al. 2008,Rev. Sci. Instrum., 79: 093503 15 Hennen B A, Westerhof E, Oosterbeek J W, et al. 2009,Fusion Eng. Des., 84: 928 16 Park Y S, Welander A S. 2006, Plasma Phys. Control.Fusion, 48: 1447 17 Yuan Q, Xiao B, Penaflor B, et al. 2009, Plasma Science and Technology, 11: 734

[1]	Yuan YAO, Yao YANG, Ang TI, Yang SONG, Jiamin ZHANG, Yan WANG, Yao ZHANG, Haiqing LIU, Yinxian JIE. A fringe jump counting method for the phase measurement in the HCN laser interferometer on EAST and its FPGA-based implementation[J]. Plasma Science and Technology, 2024, 26(4): 045601. DOI: 10.1088/2058-6272/ad0dec
[2]	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
[3]	Lin SHEN (申林), Lei GONG (宫蕾), Shuhua CHEN (陈淑花), Shiping ZHAN (詹世平), Cheng ZHANG (章程), Tao SHAO (邵涛). Improvement of β-phase crystal formation in a BaTiO₃-modified PVDF membrane[J]. Plasma Science and Technology, 2018, 20(6): 65510-065510. DOI: 10.1088/2058-6272/aaada8
[4]	Qiyun CHENG (程启耘), Yi YU (余羿), Shaobo GONG (龚少博), Min XU (许敏), Tao LAN (兰涛), Wei JIANG (蒋蔚), Boda YUAN (袁博达), Yifan WU (吴一帆), Lin NIE (聂林), Rui KE (柯锐), Ting LONG (龙婷), Dong GUO (郭栋), Minyou YE (叶民友), Xuru DUAN (段旭如). Optical path design of phase contrast imaging on HL-2A tokamak[J]. Plasma Science and Technology, 2017, 19(12): 125601. DOI: 10.1088/2058-6272/aa8d64
[5]	DING Baogang (丁宝钢), CHEN Chao (陈超), WANG Wendi (王闻迪), WU Tongyu (吴彤宇), ZHOU Yan (周艳), YIN Zejie (阴泽杰). Research on the Real-Time Phase Jump Process Method for Plasma Electron Density Measurement in HL-2A Tokamak[J]. Plasma Science and Technology, 2015, 17(10): 837-841. DOI: 10.1088/1009-0630/17/10/05
[6]	XU Ming (徐明), WEN Yizhi (闻一之), XIE Jinlin (谢锦林), YU Changxuan (俞昌旋), et al.. Internal Magnetic Configuration Measured by ECE Imaging on EAST Tokamak[J]. Plasma Science and Technology, 2013, 15(12): 1194-1196. DOI: 10.1088/1009-0630/15/12/05
[7]	LIU Hui (刘辉), TANG Ke (唐柯), GAO Ge (高格), FU Peng (傅鹏), et al.. Study of the EAST Fast Control Power Supply Based on Carrier Phase-Shift PWM[J]. Plasma Science and Technology, 2013, 15(9): 950-954. DOI: 10.1088/1009-0630/15/9/22
[8]	HAN Xiang (韩翔), LING Bili (凌必利), GAO Xiang (高翔), LIU Yong (刘永), TI Ang (提昂), LI Erzhong (李二众), XU Liqing (徐立清), WANG Yumin (王嵎民). Measurement of Magnetic Island Width by Multi-Channel ECE Radiometer on HT-7 Tokamak[J]. Plasma Science and Technology, 2013, 15(3): 217-220. DOI: 10.1088/1009-0630/15/3/05
[9]	YE Wenting(叶文婷), WU Di(吴迪), PAN Xin(潘欣), CHEN Yashao(陈亚芍), HAN Yong(憨勇), SONG Zhongxiao(宋忠孝). Preparation of Chitosan Coatings Containing Calcium and Phosphorus on Titanium Surface by the Cathode Liquid Phase Plasma Technology[J]. Plasma Science and Technology, 2010, 12(5): 614-618.
[10]	WANG Qiuying (王秋颖), LI Sen(李森), GU Fan(顾璠). Mechanism of Phase Transition from Liquid to Gas under Dielectric Barrier Discharge Plasma[J]. Plasma Science and Technology, 2010, 12(5): 585-591.