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

NIE Lin (聂林); CHENG Jun (程钧); XU Hongbing (徐红兵); HUANG Yuan (黄渊); YAN Longwen (严龙文); DING Xuantong (丁玄同); XU Min (许敏); XU Yuhong (许宇鸿); YAO Lianghua (姚良骅); FENG Beibin (冯北滨); ZHU Genliang (朱根良); LIU Wandong (刘万东); DONG Jiaqi (董家齐); YU Deliang (余德良); ZHONG Wulv (钟武律); GAO Jinming (高金明); CHEN Chengyuan (陈程远); YANG Qingwei (杨青巍); DUAN Xuru (段旭如)

doi:10.1088/1009-0630/18/2/04

Plasma Science and Technology > 2016 > 18(2): 120-125. > DOI: 10.1088/1009-0630/18/2/04

NIE Lin (聂林), CHENG Jun (程钧), XU Hongbing (徐红兵), HUANG Yuan (黄渊), YAN Longwen (严龙文), DING Xuantong (丁玄同), XU Min (许敏), XU Yuhong (许宇鸿), YAO Lianghua (姚良骅), FENG Beibin (冯北滨), ZHU Genliang (朱根良), LIU Wandong (刘万东), DONG Jiaqi (董家齐), YU Deliang (余德良), ZHONG Wulv (钟武律), GAO Jinming (高金明), CHEN Chengyuan (陈程远), YANG Qingwei (杨青巍), DUAN Xuru (段旭如). Comparison of ELM-Filament Mitigation Between Supersonic Molecular Beam Injection and Pellet Injection on HL-2A[J]. Plasma Science and Technology, 2016, 18(2): 120-125. DOI: 10.1088/1009-0630/18/2/04

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

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

Funds: 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), and the China-Korean Joint Research Program (No. 2012DFG02230)

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Received Date: March 26, 2015

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Abstract

Abstract

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.
- ELM-filament,
- SMBI,
- pellet injection,
- convective transport,
- electron-ion col?lisionality,
- long-range correlation

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References

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