Effect of edge plasma density on hot spot in LHCD plasma in EAST

doi:10.1016/j.nme.2021.100992

	Effect of edge plasma density on hot spot in LHCD plasma in EAST
	Ding, B. J.6; Wu, C. B.3,6; Li, Y. C.4; Li, M. H.6; Wang, Y. F.3,6; Zhang, B.6; Yan, G. H.3,6; Liu, H. Q.6; Wang, L.6; Wang, M.6
刊名	NUCLEAR MATERIALS AND ENERGY
	2021-06-01
卷号	27
关键词	Lower hybrid current drive Hot spot Edge plasma density Heat flux Tokamak
DOI	10.1016/j.nme.2021.100992
通讯作者	Ding, B. J.(bjding@ipp.ac.cn) ; Li, Y. C.(ycunli@ipp.ac.cn)
英文摘要	Hot spot is a serious challenge limiting long pulse operation with LHCD (lower hybrid current drive) in tokamak. In order to mitigate the hot spot in guard limiter and improve LHCD capability, effect of edge plasma density on inducing hot spot and current drive has been studied in EAST. The temperature in the guard limiter of the LH antenna, inducing hot spot directly, increases with edge density and LH power. Studies show that the hot spot is mainly ascribed to the heat flux in front of LH antenna. Further simulation indicates that such spot corresponds to the peak position of edge density due to local LH electric field. In addition, due to the stronger parametric instability (PI) behavior in the case of higher edge density, the current drive capability decreases with edge density. Strike-point splitting behaviors appear with density increase, in agreement with current profiles in the edge region and the reduction of total driven current, suggesting that more power is deposited in edge region, which does more contribution to hot spot. Above studies offer one possible idea to optimize the edge density so as to satisfy the coupling, mitigate the heat flux in the guard limiter, and improve current drive capability for fusion device.
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[11775259] ; national natural science foundation of China[11675214] ; national natural science foundation of China[11805233] ; national natural science foundation of China[U19A20113]
WOS关键词	HYBRID CURRENT DRIVE ; PARAMETRIC-INSTABILITIES
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000670923000009
资助机构	National Key Research and Development Program of China ; national natural science foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/123535]
专题	中国科学院合肥物质科学研究院
通讯作者	Ding, B. J.; Li, Y. C.
作者单位	1.MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA 2.CEA, IRFM, F-13108 St Paul Les Durance, France 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Shenzhen Univ, Coll Optoelect Engn, Shenzhen 518060, Peoples R China 5.ENEA, Fus & Nucl Safety Dept, Via E Fermi 45, I-00044 Rome, Italy 6.Chinese Acad Sci, Hefei Inst Phys Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Ding, B. J.,Wu, C. B.,Li, Y. C.,et al. Effect of edge plasma density on hot spot in LHCD plasma in EAST[J]. NUCLEAR MATERIALS AND ENERGY,2021,27.
APA	Ding, B. J..,Wu, C. B..,Li, Y. C..,Li, M. H..,Wang, Y. F..,...&Wan, B. N..(2021).Effect of edge plasma density on hot spot in LHCD plasma in EAST.NUCLEAR MATERIALS AND ENERGY,27.
MLA	Ding, B. J.,et al."Effect of edge plasma density on hot spot in LHCD plasma in EAST".NUCLEAR MATERIALS AND ENERGY 27(2021).