Divertor detachment operation in helium plasmas with ITER-like tungsten divertor in EAST

doi:10.1088/2058-6272/ac621d

	Divertor detachment operation in helium plasmas with ITER-like tungsten divertor in EAST
	Liu, Jianbin 2; Meng, Lingyi 2,3; Guo, Houyang 2; Li, Kedong 2,3; Xu, Jichan 4; Wang, Huiqian 5; Xu, Guosheng 2; Ding, Fang 2; Zhang, Ling 2; Duan, Yanmin 2
刊名	PLASMA SCIENCE & TECHNOLOGY
	2022-07-01
卷号	24
关键词	divertor detachment helium plasma density threshold EAST
ISSN号	1009-0630
DOI	10.1088/2058-6272/ac621d
通讯作者	Ding, Rui(rding@ipp.ac.cn) ; Wang, Liang(lwang@ipp.ac.cn)
英文摘要	Detachment in helium (He) discharges has been achieved in the EAST superconducting tokamak equipped with an ITER-like tungsten divertor. This paper presents the experimental observations of divertor detachment achieved by increasing the plasma density in He discharges. During density ramp-up, the particle flux shows a clear rollover, while the electron temperature around the outer strike point is decreasing simultaneously. The divertor detachment also exhibits a significant difference from that observed in comparable deuterium (D) discharges. The density threshold of detachment in the He plasma is higher than that in the D plasma for the same heating power, and increases with the heating power. Moreover, detachment assisted with neon (Ne) seeding was also performed in L- and H-mode plasmas, pointing to the direction for reducing the density threshold of detachment in He operation. However, excessive Ne seeding causes confinement degradation during the divertor detachment phase. The precise feedback control of impurity seeding will be performed in EAST to improve the compatibility of core plasma performance with divertor detachment for future high heating power operations.
资助项目	National Key Research and Development Program of China[2017YFA0301300] ; National Key Research and Development Program of China[2017YFE0402500] ; National Key Research and Development Program of China[2019YFE03030000] ; National Natural Science Foundation of China[11905255] ; National Natural Science Foundation of China[12005004] ; National Natural Science Foundation of China[12022511] ; National Natural Science Foundation of China[U1867222] ; National Natural Science Foundation of China[U19A20113] ; Institute of Energy, Hefei Comprehensive National Science Center[GXXT-2020-004] ; AHNSF[2008085QA38] ; CASHIPS Director's Fund[BJPY2019B01] ; Key Research Program of Frontier Sciences of CAS[ZDBS-LY-SLH010]
WOS关键词	PHYSICS ; WALL
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000812408200001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Institute of Energy, Hefei Comprehensive National Science Center ; AHNSF ; CASHIPS Director's Fund ; Key Research Program of Frontier Sciences of CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131319]
专题	中国科学院合肥物质科学研究院
通讯作者	Ding, Rui; Wang, Liang
作者单位	1.Hefei Comprehens Natl Sci Ctr, Inst Energy, Hefei 230031, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, HFIPS, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Hefei 230026, Peoples R China 4.Anhui Univ Sci & Technol, Sch Mech Engn, Huainan 232001, Peoples R China 5.Gen Atom, San Diego, CA 92186 USA
推荐引用方式 GB/T 7714	Liu, Jianbin,Meng, Lingyi,Guo, Houyang,et al. Divertor detachment operation in helium plasmas with ITER-like tungsten divertor in EAST[J]. PLASMA SCIENCE & TECHNOLOGY,2022,24.
APA	Liu, Jianbin.,Meng, Lingyi.,Guo, Houyang.,Li, Kedong.,Xu, Jichan.,...&Wang, Liang.(2022).Divertor detachment operation in helium plasmas with ITER-like tungsten divertor in EAST.PLASMA SCIENCE & TECHNOLOGY,24.
MLA	Liu, Jianbin,et al."Divertor detachment operation in helium plasmas with ITER-like tungsten divertor in EAST".PLASMA SCIENCE & TECHNOLOGY 24(2022).