The effects of Er × Bt drift on LH wave coupling with divertor configuration at EAST

doi:10.1088/1361-6587/abfdd3

	The effects of Er × Bt drift on LH wave coupling with divertor configuration at EAST
	Li,Y C 1,6; Ding,B J 5; Li,M H 5; Wang,M 5; Liu,L 5; Wang,Y F 4; Wu,C B 4; Yan,G H 4; Kong,E H 3; Zhang,L 2
刊名	Plasma Physics and Controlled Fusion
	2021-06-11
卷号	63
关键词	LH wave coupling Er × Bt drift plasma current edge density at the LH grill
ISSN号	0741-3335
DOI	10.1088/1361-6587/abfdd3
通讯作者	Ding,B J() ; Lin,X D()
英文摘要	AbstractThe coupling characteristics of the 4.6 GHz lower hybrid (LH) grill and the factors affecting LH wave coupling, mainly Er×Bt drift, with divertor configuration in anti-clockwise/clockwise magnetic field direction are studied. Based on the Langmuir probe measurement, the relationship between the re?ection coefficient (RC) of LH power and the edge density at the grill mouth ( ne,grill) measured by Langmuir probes is investigated. The optimum LH wave coupling with RC less than 2% is achieved when ne,grill is in the range of 1×1018m?3– 2×1018m?3, which is quite close to the theoretically predicted value. In addition, the experimental results show that Er×Bt drift in the divertor scrape off layer plays a dominant role in affecting ne,grill and LH wave coupling. Studies show that the discrepancy in ne,grill and LH wave coupling in different magnetic field directions is mainly attributed to the different directions of Er×Bt drift, whereas the corresponding discrepancy with different plasma currents is mainly ascribed to the change in Er×Bt drift intensity. Therefore, for the upper single null divertor configuration, a lower/higher plasma currents is more favorable for increasing ne,grill and improving LH wave coupling in anti-clockwise/clockwise Bt. The above studies are of great significance for optimizing and improving LH wave coupling in the extension of the plasma operation regime.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0741-3335-63-7-ABFDD3
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123993]
专题	中国科学院合肥物质科学研究院
通讯作者	Ding,B J; Lin,X D
作者单位	1.Advanced Energy Research Center, Shenzhen University, Shenzhen 518060, People’s Republic of China 2.Shanxi University of Technology, Hanzhong 723001, People’s Republic of China 3.Anhui University of Science and Technology, Huainan 232001, People’s Republic of China 4.University of Science and Technology of China, Hefei 230026, People’s Republic of China 5.Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China 6.Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, People’s Republic of China
推荐引用方式 GB/T 7714	Li,Y C,Ding,B J,Li,M H,et al. The effects of Er × Bt drift on LH wave coupling with divertor configuration at EAST[J]. Plasma Physics and Controlled Fusion,2021,63.
APA	Li,Y C.,Ding,B J.,Li,M H.,Wang,M.,Liu,L.,...&Wang,L.(2021).The effects of Er × Bt drift on LH wave coupling with divertor configuration at EAST.Plasma Physics and Controlled Fusion,63.
MLA	Li,Y C,et al."The effects of Er × Bt drift on LH wave coupling with divertor configuration at EAST".Plasma Physics and Controlled Fusion 63(2021).