Analysis of electron temperature, impurity transport and MHD activity with multi-energy soft x-ray diagnostic in EAST tokamak

A new edge tangential multi-energy soft x-ray（ME-SXR） diagnostic with high temporal（≤ 0.1 ms） and spatial（~1 cm） resolution has been developed for a variety of physics topics studies in the EAST tokamak plasma. The fast edge electron temperature profile（approximately from r a~ 0.6 to the scrape-off...

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Published inPlasma science & technology Vol. 19; no. 12; pp. 15 - 25
Main Author 兰恒;徐国盛;Kevin TRITZ;颜宁;石同辉;李永亮;王腾飞;王亮;陈竞博;段艳敏;原毅;孙有文;顾帅;臧庆;陈冉;陈良;郑星炜;陈树亮;刘欢;叶扬;汪惠乾;万宝年;the EAST Team
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.12.2017
Subjects
'multi-foil' technique
electron temperature estimate
ELM
impurity
ME-SXR
RMP
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Summary:A new edge tangential multi-energy soft x-ray（ME-SXR） diagnostic with high temporal（≤ 0.1 ms） and spatial（~1 cm） resolution has been developed for a variety of physics topics studies in the EAST tokamak plasma. The fast edge electron temperature profile（approximately from r a~ 0.6 to the scrape-off layer） is investigated using ME-SXR diagnostic system. The data process was performed by the ideal ‘multi-foil＇ technique, with no priori assumptions of plasma profiles. Reconstructed ME-SXR emissivity profiles for a variety of EAST experimental scenarios are presented here for the first time. The applications of the ME-SXR for study of the effects of resonant magnetic perturbation on edge localized modes and the first time neon radiating divertor experiment in EAST are also presented in this work. It has been found that neon impurity can suppress the 2/1 tearing mode and trigger a 3/1 MHD mode.
Bibliography:ME-SXR ‘multi-foil＇ technique electron temperature estimate RMP ELM impurity
A new edge tangential multi-energy soft x-ray（ME-SXR） diagnostic with high temporal（≤ 0.1 ms） and spatial（~1 cm） resolution has been developed for a variety of physics topics studies in the EAST tokamak plasma. The fast edge electron temperature profile（approximately from r a~ 0.6 to the scrape-off layer） is investigated using ME-SXR diagnostic system. The data process was performed by the ideal ‘multi-foil＇ technique, with no priori assumptions of plasma profiles. Reconstructed ME-SXR emissivity profiles for a variety of EAST experimental scenarios are presented here for the first time. The applications of the ME-SXR for study of the effects of resonant magnetic perturbation on edge localized modes and the first time neon radiating divertor experiment in EAST are also presented in this work. It has been found that neon impurity can suppress the 2/1 tearing mode and trigger a 3/1 MHD mode.
Heng LAN,Guosheng XU,Kevin TRITZ,Ning YAN,Tonghui SHI,Yongliang LI,Tengfei WANG,Liang WANG,Jingbo CHEN,Yanmin DUAN,Yi YUAN,Youwen SUN,Shuai GU,Qing ZANG,Ran CHEN,Liang CHEN,Xingwei ZHENG,Shuliang CHEN,Huan LIU,Yang YE,Huiqian WANG,Baonian WAN,the EAST Team（ 1 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People＇s Republic of China; 2 University of Chinese Academy of Sciences, Beijing 100049, People＇s Republic of China ;3 Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218, United States of America ;4Oak Ridge Associated Universities, Oak Ridge, TN 37831, United States of America）
34-1187/TL
Institute of Plasma Physics
PST-2017-0147.R3
ISSN:1009-0630
1009-0630
DOI:10.1088/2058-6272/aa8cbf