Experimental observations of naturally occurring dust using a high-speed vacuum ultraviolet imaging system in EAST  

作　　者：侯善伟 明廷凤 石奇奇 张文敏 龙飞飞 李邦 邓荣婧 庄清 刘晓菊 张凌 提昂 曾龙 李国强 Naoko ASHIKAWA Satoshi OHDACHI 高翔 Shanwei HOU;Tingfeng MING;Qiqi SHI;Wenmin ZHANG;Feifei LONG;Bang LI;Rongjing DENG;Qing ZHUANG;Xiaoju LIU;Ling ZHANG;Ang TI;Long ZENG;Guoqiang LI;Naoko ASHIKAWA;Satoshi OHDACHI;Xiang GAO(Anhui University,Hefei 230601,People’s Republic of China;Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China;University of Science and Technology of China,Hefei 230026,People’s Republic of China;Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,College of Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,People’s Republic of China;Hangzhou Dianzi University,Hangzhou 310018,People’s Republic of China;National Institute for Fusion Sciences,Toki 509-5292,Japan;SOKENDAI,Toki 509-5292,Japan)

机构地区：[1]Anhui University,Hefei 230601,People’s Republic of China [2]Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,People’s Republic of China [3]University of Science and Technology of China,Hefei 230026,People’s Republic of China [4]Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province,College of Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,People’s Republic of China [5]Hangzhou Dianzi University,Hangzhou 310018,People’s Republic of China [6]National Institute for Fusion Sciences,Toki 509-5292,Japan [7]SOKENDAI,Toki 509-5292,Japan

出　　处：《Plasma Science and Technology》2023年第5期1-7,共7页等离子体科学和技术（英文版）

基　　金：supported in part by the National Key R&D Program of China(Nos.2019YFE03080200,2022YFE03030001 and2022YFE03050003);National Natural Science Foundation of China(Nos.11975271,12075284,12075283 and 12175277);the Chinese Academy of President’s International Fellowship Initiative(No.2021VMA0022);the Post-CUP program,JSPS-CAS Bilateral Joint Research Projects,‘Control of wall recycling on metallic plasma facing materials in fusion reactor’,2019–2022,(No.GJHZ201984)。

摘　　要：In the ELMy H-mode experiment,naturally occurring dust originating at the high-field side is clearly observed using the high-speed vacuum ultraviolet imaging system developed on the Experimental Advanced Superconducting Tokamak(EAST).The main ablation cloud shape is similar to the classical shape observed in pellet fueling experiments.However,during the dust penetration,an erupted secondary cloudlet with a bent‘cigar’shape is observed and moves upwards along the direction perpendicular to the magnetic field line,which is different to the obviation in the pellet fueling experiments.This may be due to the ion diamagnetic drift effect.The velocities of the secondary cloudlet are estimated to be 50–80 m s^(-1).In addition,a significant degradation of the plasma confinement is observed during the dust penetration.

关 键 词：H-MODE HFS VUVI EAST tokamak dust cloudlet 

分 类 号：TL631.24[核科学技术—核技术及应用]