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

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...

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Published inPlasma science & technology Vol. 18; no. 2; pp. 120 - 125
Main Author 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
Format Journal Article
LanguageEnglish
Published 01.02.2016
Subjects
Correlation
Density
Filaments
Fluxes
Magnetic flux
Molecular beams
Pellets
Transport
分子组织
注射剂
等离子体
超声波
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ISSN1009-0630
DOI10.1088/1009-0630/18/2/04

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Summary: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.
Bibliography:ELM-filament SMBI pellet injection convective transport electron-ion collisionality long-range correlation
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.
NIE Lin , CHENG Jun , XU Hongbing, HUANG Yuan , YAN Longwen , DING Xuantong, XU Min, XU Yuhong, YAO Lianghua , FENG Beibin , ZHU Genliang ,LIU Wandong , DONG Jiaqi ,YU Deliang, ZHONG Wulv,GAO Jinming , CHEN Chengyuan , YANG Qingwei, DUAN Xuru （ 1Key Laboratory of Basic Plasma Physics and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China 2Southwestern Institute of Physics, Chengdu 610041, China 3Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027, China
34-1187/TL
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ISSN:1009-0630
DOI:10.1088/1009-0630/18/2/04