Development of Langmuir probe array for the new lower tungsten divertor in EAST

doi:10.1016/j.fusengdes.2022.113011

	Development of Langmuir probe array for the new lower tungsten divertor in EAST
	Meng, L. Y.1,2; Xu, J. C.3; Liu, J. B.1; Cao, L.1; Wang, P.1,2; Li, A.1,2; Yu, L.1,2; Xu, G. S.1; Wang, L.1,4
刊名	FUSION ENGINEERING AND DESIGN
	2022-02-01
卷号	175
关键词	Divertor Langmuir probe Tungsten divertor Diagnostic EAST
ISSN号	0920-3796
DOI	10.1016/j.fusengdes.2022.113011
通讯作者	Xu, J. C.(jichanxu@aust.edu.cn) ; Wang, L.(lwang@ipp.ac.cn)
英文摘要	The divertor Langmuir probes (Div-LPs) system is a key diagnostic, which is widely used in advanced tokamaks including ITER, for divertor plasma measurement. With the improvement of EAST performance by more available heating power, the lower graphite divertor has been upgraded to a new tungsten structure recently. Therefore, the Div-LPs for the EAST lower divertor have undergone an overall upgrade, including the structure of the probe tip, the layout of the probe arrays and the optimized power supply. In the EAST 2021 experimental campaign, the new Div-LPs, which can measure the electron temperature, plasma density, heat and particle fluxes at the divertor plates, have been tested by long-term discharges with long-pulse plasmas. In the strike point sweeping experiments, the particle flux distribution and evolution measured by the Div-LPs match the inversed strike point by EFIT code excellently. In addition, the Div-LPs have been successfully employed in long-pulse plasmas over 100 s with high core electron temperature operation. In the long-pulse discharges, the data measured by Div-LPs are reliable by cross-validation with key plasma parameters. Moreover, it is observed that the electron temperature, particle and heat fluxes measured by Div-LPs significantly drop after impurity seeding, which is consistent with the surface temperature measured by the infrared camera. These experimental results demonstrate the success on the upgrade of the new divertor Langmuir probe system, which will provide essential diagnostic data for divertor physics study and plasma control, especially for long-pulse high-performance operation.
资助项目	National Key R&D Program of China[2017YFE0301300] ; National Key R&D Program of China[2018YFE0303104] ; National Key R&D Program of China[2019YFE03030000] ; Institute of Energy, Hefei Comprehensive National Science Center[GXXT-2020-004] ; National Natural Science Foundation of China[12005004] ; National Natural Science Foundation of China[11922513] ; National Natural Science Foundation of China[U1867222] ; National Natural Science Foundation of China[U19A20113] ; AHNSF[2008085QA38]
WOS关键词	SYSTEM ; DESIGN
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000779064100005
资助机构	National Key R&D Program of China ; Institute of Energy, Hefei Comprehensive National Science Center ; National Natural Science Foundation of China ; AHNSF
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131428]
专题	中国科学院合肥物质科学研究院
通讯作者	Xu, J. C.; Wang, L.
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China 3.Anhui Univ Sci & Technol, Sch Mech Engn, Huainan 232001, Peoples R China 4.Hefei Comprehens Natl Sci Ctr, Inst Energy, Hefei 230031, Peoples R China
推荐引用方式 GB/T 7714	Meng, L. Y.,Xu, J. C.,Liu, J. B.,et al. Development of Langmuir probe array for the new lower tungsten divertor in EAST[J]. FUSION ENGINEERING AND DESIGN,2022,175.
APA	Meng, L. Y..,Xu, J. C..,Liu, J. B..,Cao, L..,Wang, P..,...&Wang, L..(2022).Development of Langmuir probe array for the new lower tungsten divertor in EAST.FUSION ENGINEERING AND DESIGN,175.
MLA	Meng, L. Y.,et al."Development of Langmuir probe array for the new lower tungsten divertor in EAST".FUSION ENGINEERING AND DESIGN 175(2022).