A newly designed divertor Langmuir probe diagnostic system has been installed in a rare closed divertor of the HL-2A tokamak and steadily operated for the study of divertor physics involved edge-localized mode mitigation,detachment and redistribution of heat flux,etc.Two sets of probe arrays including 274 probe tips were placed at two ports(approximately 180° separated toroidally),and the spatial and temporal resolutions of this measurement system could reach 6 mm and 1 μs,respectively.A novel design of the ceramic isolation ring can ensure reliable electrical insulation property between the graphite tip and the copper substrate plate where plasma impurities and the dust are deposited into the gaps for a long experimental time.Meanwhile,the condition monitoring and mode conversion between single and triple probe of the probe system could be conveniently implemented via a remote-control station.The preliminary experimental result shows that the divertor Langmuir probe system is capable of measuring the high spatiotemporal parameters involved the plasma density,electron temperature,particle flux as well as heat flux during the ELMy H-mode discharges.

Zhihui HUANG;Jun CHENG;Na WU;Longwen YAN;Hongbing XU;Weice WANG;Xianggan MIAO;Kaiyang YI;Jianqiang XU;Laizhong CAI;Zhongbing SHI;Jiaqi DONG;Yi LIU;Wulyu ZHONG;Qingwei YANG;Min XU;Xuru DUAN

Southwestern Institute of Physics,Chengdu 610041,People's Republic of China;Institute of Fusion Science,School of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610031,People's Republic of China;Institute for Fusion Theory and Simulation,Zhejiang University,Hangzhou 310027,People's Republic of China

等离子体科学和技术（英文版）

[1]Zhihui HUANG;Jun CHENG;Na WU;Longwen YAN;Hongbing XU;Weice WANG;Xianggan MIAO;Kaiyang YI;Jianqiang XU;Laizhong CAI;Zhongbing SHI;Jiaqi DONG;Yi LIU;Wulyu ZHONG;Qingwei YANG;Min XU;Xuru DUAN-.Upgrade of an integrated Langmuir probe system on the closed divertor target plates in the HL-2A tokamak)[J].等离子体科学和技术（英文版）,2022(05):9-16

toroidally,ELMy

Upgrade,integrated,Langmuir,probe,system,closed,divertor,target,plates,HL,2A,tokamak,newly,designed,diagnostic,has,been,installed,rare,steadily,operated,study,physics,involved,edge,localized,mode,mitigation,detachment,redistribution,heat,flux,etc,Two,sets,arrays,including,tips,were,placed,two,ports,approximately,separated,spatial,resolutions,this,measurement,could,reach,respectively,novel,ceramic,isolation,can,ensure,reliable,electrical,insulation,property,between,graphite,copper,substrate,where,plasma,impurities,dust,deposited,into,gaps,long,experimental,Meanwhile,condition,monitoring,conversion,single,triple,conveniently,implemented,via,remote,control,station,preliminary,result,shows,that,capable,measuring,high,spatiotemporal,parameters,density,electron,temperature,particle,well,during,discharges

0.617992