Comparison of ELM-Filament Mitigation Between Supersonic Molecular Beam Injection and Pellet Injection on HL-2A  

作　　者：聂林 程钧 徐红兵 黄渊 严龙文 丁玄同 许敏 许宇鸿 姚良骅 冯北滨 朱根良 刘万东 董家齐 余德良 钟武律 高金明 陈程远 杨青巍 段旭如 

机构地区：[1]Key Laboratory of Basic Plasma Physics and Department of Modern Physics,University of Science and Technology of China, Hefei 230026, China [2]Southwestern Institute of Physics, Chengdu 610041, China [3]Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027, China

出　　处：《Plasma Science and Technology》2016年第2期120-125,共6页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(Nos.11075046,10975049,11375054,11275060);the National Magnetic Confinement Fusion Science Program of China(Nos.2013GB112008,2013GB107000,2013GB104002,2014GB107000,2014GB108000);the China-Korean Joint Research Program(No.2012DFG02230)

摘　　要：On HL-2A,two different injections（supersonic molecular beam injection（SMBI）and pellet injection（PI）） are used to mitigate edge localized mode（ELM）-filament convective transport.The changes of their characteristics are studied in this paper.A high spatiotemporal resolution probe shows there are many similar phenomena,and the filament density amplitude and radial velocity are both suppressed.Our statistical results indicate that：the velocity suppression comes from the decrease of filament density and temperature;the transient particle and heat fluxes drop strongly;and long-range correlation along a magnetic flux surface also decreases,when the electron-ion collisionality increases significantly,which may have a role on the filament parallel current during ELM mitigation.On HL-2A,two different injections（supersonic molecular beam injection（SMBI）and pellet injection（PI）） are used to mitigate edge localized mode（ELM）-filament convective transport.The changes of their characteristics are studied in this paper.A high spatiotemporal resolution probe shows there are many similar phenomena,and the filament density amplitude and radial velocity are both suppressed.Our statistical results indicate that：the velocity suppression comes from the decrease of filament density and temperature;the transient particle and heat fluxes drop strongly;and long-range correlation along a magnetic flux surface also decreases,when the electron-ion collisionality increases significantly,which may have a role on the filament parallel current during ELM mitigation.

关 键 词：ELM-filament SMBI pellet injection convective transport electron-ion collisionality long-range correlation 

分 类 号：TL631.24[核科学技术—核技术及应用]