Density scaling of error field penetration in radio-frequency-dominant heating plasmas in the EAST tokamak

doi:10.1088/1741-4326/abeed5

	Density scaling of error field penetration in radio-frequency-dominant heating plasmas in the EAST tokamak
	Ye,Cheng 1,2; Sun,You-Wen 2; Wang,Hui-Hui 2; Wang,Zheng-Xiong 1; Wei,Lai 1; Ma,Qun 2; Zang,Qing 2; Gu,Shuai 3,4; He,Kai-Yang 2; Chu,Nan 2
刊名	Nuclear Fusion
	2021-04-21
卷号	61
关键词	error field penetration LHCD heating density scaling
ISSN号	0029-5515
DOI	10.1088/1741-4326/abeed5
通讯作者	Wang,Hui-Hui() ; Wang,Zheng-Xiong()
英文摘要	AbstractThe density scaling of n = 1 error field penetration is investigated under radio-frequency (RF)-dominant heated L-mode discharges in the EAST tokamak. It is found that the density scaling of the threshold field strength for error field penetration in lower-hybrid current drive (LHCD) plasmas is about br∝ne0.4, where br represents the error field amplitude. The results show a weaker density dependence compared to that observed in the previous ohmic heated discharges (Wang et?al 2018 Nucl. Fusion 58 056024). For a better understanding of the density scaling, it is compared with field penetration theories, and it is found that it lies in the Waelbroeck regime. The observed scaling is consistent with that evaluated with the magnetohydrodynamic (MHD) theory on error field penetration, for which all the physical parameters are determined experimentally. Due to the density dependence of LHCD heating efficiency, the stronger negative correlation between density and temperature results in a weaker density scaling in these LHCD plasmas. Using realistic parameters under LHCD and ohmic heating as input, respectively, the numerical results based on a reduced MHD model reproduce well the scaling from the error field penetration theory and the observations. Besides, the density scaling in various tokamak operational regimes is also numerically investigated. This provides an excellent validation of MHD theory on error field penetration in the RF-dominant heated L-mode discharges.
资助项目	National Key R&D Program of China[2017YFE0301100] ; National Natural Science Foundation of China[11925501] ; National Natural Science Foundation of China[11875292] ; Liao Ning Revitalization Talents Program[XLYC1802009]
WOS关键词	TEARING MODES ; THRESHOLDS ; ISLANDS
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0029-5515-61-5-ABEED5
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; Liao Ning Revitalization Talents Program
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/121837]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang,Hui-Hui; Wang,Zheng-Xiong
作者单位	1.Key Laboratory of Materials Modification by Beams, Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, China 2.Institute of Plasma Physics, Chinese Academy of Sciences, PO Box 1126, Hefei 230031, China 3.General Atomics, PO Box 85608, San Diego, CA 92186-5608, United States of America 4.Oak Ridge Associated Universities, Oak Ridge, TN 37830, United States of America
推荐引用方式 GB/T 7714	Ye,Cheng,Sun,You-Wen,Wang,Hui-Hui,et al. Density scaling of error field penetration in radio-frequency-dominant heating plasmas in the EAST tokamak[J]. Nuclear Fusion,2021,61.
APA	Ye,Cheng.,Sun,You-Wen.,Wang,Hui-Hui.,Wang,Zheng-Xiong.,Wei,Lai.,...&Chen,Ying-Jie.(2021).Density scaling of error field penetration in radio-frequency-dominant heating plasmas in the EAST tokamak.Nuclear Fusion,61.
MLA	Ye,Cheng,et al."Density scaling of error field penetration in radio-frequency-dominant heating plasmas in the EAST tokamak".Nuclear Fusion 61(2021).