Modeling of SOL helical current filaments induced by biased electrode on J-TEXT

doi:10.1088/1361-6587/ac2373

	Modeling of SOL helical current filaments induced by biased electrode on J-TEXT
	Li, Shuhao 1; Wang, Nengchao 1; Ding, Yonghua 1; Song, Zebao 1; Liang, Yunfeng 1,2,3; Yang, Qinghu 1; Mao, Feiyue 1; Huang, Zhuo 1; Shen, Chengshuo 1; Bala, Abba Alhaji 1,4
刊名	PLASMA PHYSICS AND CONTROLLED FUSION
	2021-11-01
卷号	63
关键词	SOL biased electrode RMP helical current filaments
ISSN号	0741-3335
DOI	10.1088/1361-6587/ac2373
通讯作者	Wang, Nengchao(wangnc@hust.edu.cn) ; Ding, Yonghua(yhding@hust.edu.cn)
英文摘要	It has been demonstrated in J-TEXT experiments that a biased electrode or electrode biasing (EB) in the scrape-off layer (SOL) can drive SOL helical current filaments (HCFs). The bright helical radiation belts of carbon impurities in the SOL indicate that SOL current flows along the magnetic field lines. Based on the experimental phenomenon, three SOL current models (model A, B, C) have been set-up in order to understand the spatial structure of SOL current and the perturbed magnetic field it generates. Model A is a simplified calculation of HCFs in the cylindrical geometry, and takes into account the presence of cross-field current by a linear decay of current along magnetic field lines. Model B take into account the actual toroidal geometry and the complex path of HCFs connected from the electrode to the limiters. By including the radial dependence of the resistivity into model B, model C is developed and describes the SOL current more perfectly than the other two models. Furthermore, the model C shows that SOL helical current can produces stronger boundary resonant magnetic perturbations (RMPs) at the last closed flux surface (LCFS) due to the consistent helixity of SOL current filaments and the boundary rational surface, which may be a new way to generate RMPs to control the edge-localized modes (ELMs). The equivalent inductance and resistance of HCFs at different edge safety factor q (a) are measured by applying a square wave voltage. The results show that the inductance and resistance of the HCFs are related to q (a) and the radial position of the biased electrode r (EB), in a qualitatively consistent manner as that predicted by model C.
资助项目	National Key R&D Program of China[2017YFE0301100] ; National Natural Science Foundation of China[11905078] ; National Natural Science Foundation of China[12075096] ; National Natural Science Foundation of China[12047526] ; National Natural Science Foundation of China[51821005] ; Fundamental Research Funds for the Central Universities[2020kfyXJJS003]
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000706859200001
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/125565]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, Nengchao; Ding, Yonghua
作者单位	1.Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn & Technol, Int Joint Res Lab Magnet Confinement Fus & Plasma, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Forschungszentrum Julich, Inst Energie & Klimaforsch Plasmaphys, D-52425 Julich, Germany 4.Fed Univ Dutse, Phys Dept, Dutse, Jigawa, Nigeria
推荐引用方式 GB/T 7714	Li, Shuhao,Wang, Nengchao,Ding, Yonghua,et al. Modeling of SOL helical current filaments induced by biased electrode on J-TEXT[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2021,63.
APA	Li, Shuhao.,Wang, Nengchao.,Ding, Yonghua.,Song, Zebao.,Liang, Yunfeng.,...&Pan, Yuan.(2021).Modeling of SOL helical current filaments induced by biased electrode on J-TEXT.PLASMA PHYSICS AND CONTROLLED FUSION,63.
MLA	Li, Shuhao,et al."Modeling of SOL helical current filaments induced by biased electrode on J-TEXT".PLASMA PHYSICS AND CONTROLLED FUSION 63(2021).