The effects of E-r x B-t drift on LH wave coupling with divertor configuration at EAST

doi:10.1088/1361-6587/abfdd3

	The effects of E-r x B-t drift on LH wave coupling with divertor configuration at EAST
	Li, Y. C.1,6; Ding, B. J.2; Li, M. H.2; Wang, M.2; Liu, L.2; Wang, Y. F.3; Wu, C. B.3; Yan, G. H.3; Kong, E. H.4; Zhang, L.5
刊名	PLASMA PHYSICS AND CONTROLLED FUSION
	2021-07-01
卷号	63
关键词	LH wave coupling E-r x B-t 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.(bjding@ipp.ac.cn) ; Lin, X. D.(linxd@szu.edu.cn)
英文摘要	The coupling characteristics of the 4.6 GHz lower hybrid (LH) grill and the factors affecting LH wave coupling, mainly E-r x B-t drift, with divertor configuration in anti-clockwise/clockwise magnetic field direction are studied. Based on the Langmuir probe measurement, the relationship between the reflection coefficient (RC) of LH power and the edge density at the grill mouth (n(e,grill)) measured by Langmuir probes is investigated. The optimum LH wave coupling with RC less than 2% is achieved when n(e,grill) is in the range of 1 x 10(18) m(-3) -2 x 10(18) m(-3), which is quite close to the theoretically predicted value. In addition, the experimental results show that E-r x B-t drift in the divertor scrape off layer plays a dominant role in affecting n(e,grill) and LH wave coupling. Studies show that the discrepancy in n(e,grill) and LH wave coupling in different magnetic field directions is mainly attributed to the different directions of E-r x B-t drift, whereas the corresponding discrepancy with different plasma currents is mainly ascribed to the change in E-r x B-t drift intensity. Therefore, for the upper single null divertor configuration, a lower/higher plasma currents is more favorable for increasing n(e,grill) and improving LH wave coupling in anti-clockwise/clockwise B-t. The above studies are of great significance for optimizing and improving LH wave coupling in the extension of the plasma operation regime.
资助项目	National Key Research and Development Program of China[2016YFA0400603] ; National Key Research and Development Program of China[2016YFA0400602] ; National Natural Science Foundation of China[11975266] ; National Natural Science Foundation of China[11675214] ; National Natural Science Foundation of China[11775259] ; National Natural Science Foundation of China[11805233] ; National Natural Science Foundation of China[U19A20113] ; Shenzhen Clean Energy Research Institute
WOS关键词	HYBRID CURRENT DRIVE ; SCRAPE-OFF LAYER ; STEADY-STATE ; PLASMA ; TRANSPORT ; SYSTEM
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000660953400001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Shenzhen Clean Energy Research Institute
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123911]
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.Shenzhen Univ, Coll Optoelect Engn, Minist Educ & Guangdong Prov, Key Lab Optoelect Devices & Syst, Shenzhen 518060, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Anhui Univ Sci & Technol, Huainan 232001, Peoples R China 5.Shanxi Univ Technol, Hanzhong 723001, Peoples R China 6.Shenzhen Univ, Adv Energy Res Ctr, Shenzhen 518060, Peoples R China
推荐引用方式 GB/T 7714	Li, Y. C.,Ding, B. J.,Li, M. H.,et al. The effects of E-r x B-t 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 E-r x B-t 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 E-r x B-t drift on LH wave coupling with divertor configuration at EAST".PLASMA PHYSICS AND CONTROLLED FUSION 63(2021).