Experimental investigation of scrape-off layer blob high density transition in L-mode plasmas on EAST

作     者：Ping WANG Guanghai HU Ning YAN Guosheng XU Lingyi MENG Zhikang LU Lin YU Manni JIA Yifeng WANG Liang CHEN Heng LAN Xiang LIU Mingfu WU Liang WANG 汪平;胡广海;颜宁;徐国盛;孟令义;卢智康;余林;贾曼妮;王一丰;陈良;兰恒;刘祥;吴茗甫;王亮

作者机构：Institute of Plasma PhysicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of ChinaHefei 230026People's Republic of China College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060People's Republic of China Advanced Energy Research CenterShenzhen UniversityShenzhen 518060People's Republic of China Institute of EnergyHefei Comprehensive National Science CentreHefei 230031People's Republic of China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2022年第24卷第7期

页      面：129-136页

核心收录：

学科分类：08[工学] 082701[工学-核能科学与工程] 0827[工学-核科学与技术] 0702[理学-物理学] 

基　　金：supported by the National Key R&D Program of China(Nos.2017YFE0301300,2017YFA0402500,2019YFE03030000) Institute of Energy,Hefei Comprehensive National Science Center(Nos.GXXT2020004,12105187) National Natural Science Foundation of China(Nos.11922513,U19A20113,11905255,12005004) Anhui Provincial Natural Science Foundation(No.2008085QA38) China Postdoctoral Science Foundation(No.2021M702245) 

主　　题：blobs divertor detachment L-mode EAST 

摘      要：Lithium Beam Emission Spectroscopy systems in the outer midplane and divertor Langmuir probe arrays embedded in the divertor target plates,are utilized to investigate the scrape-off layer(SOL)blob transition and its relation with divertor detachment on *** blob transition in the near SOL is observed during the density ramp-up *** the plasma density,normalized to the Greenwald density limit,exceeds a threshold of f_(GW)~0.5,the blob size and lifetime increases by 2–3 times,while the blob detection rate decreases by about 2 *** addition,a weak density shoulder is observed in the near SOL region at the same density *** analysis indicates that the divertor detachment is highly correlated with the blob transition,and the density threshold of blob transition is consistent with that of the access to the outer divertor *** potential physical mechanisms are *** results could be useful for the understanding of plasma-wall interaction issues in future devices that will operate under a detached divertor and high density conditions(over the blob transition threshold).