Study of Scrape-Off-Layer Width in Ohmic and Lower Hybrid Wave Heated Double-Null Divertor Plasma in EAST

Edge profiles in Ohmic and lower hybrid （LH） wave heated discharges in EAST are presented. A comparison of the measured profiles is made with those from the theoretical prediction for the scrape-off-layer （SOL） width. The edge plasma parameters are diagnosed by a triple probe divertor diagnostic sys...

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Published inPlasma science & technology Vol. 13; no. 4; pp. 435 - 439
Main Author 王亮 徐国盛 常加峰 张炜 颜宁 丁斯晔 刘少承 明廷凤 汪惠乾 刘鹏 蒋敏 熊豪 万宝年 高翔 郭后扬 胡立群 吴振伟 朱思铮 罗广南
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.08.2011
Subjects
偏滤器
关闭
国际热核实验堆
宽度
波加热
混杂
电阻
等离子体参数
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Summary:Edge profiles in Ohmic and lower hybrid （LH） wave heated discharges in EAST are presented. A comparison of the measured profiles is made with those from the theoretical prediction for the scrape-off-layer （SOL） width. The edge plasma parameters are diagnosed by a triple probe divertor diagnostic system and fast reciprocating probes at the outer mid-plane. The experimental results show that the SOL width of double-null （DN） divertor plasmas in EAST appears to exhibit a negative dependence on the power crossing the separatrix, which is consistent with the collisional SOL scalings of JET and Alcator C-Mod. This will provide useful information for extrapolation to the ITER SOL width scaling for power deposition.
Bibliography:WANG Liang XU Guosheng , CHANG Jiafeng, ZHANG Wei, YAN Ning , DING Siye , LIU Shaocheng , MING Tingfeng , WANG Huiqian , LIU Peng , JIANG Min, XIONG Hao , WAN Baonian , GAO Xiang , GUO Houyang, HU Liqun , WU Zhenwei, ZHU Sizheng , LUO Guangnan （1Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China; 2Tri Alpha Energy, Rancho Santa Margarita, CA 92688, USA）
Edge profiles in Ohmic and lower hybrid （LH） wave heated discharges in EAST are presented. A comparison of the measured profiles is made with those from the theoretical prediction for the scrape-off-layer （SOL） width. The edge plasma parameters are diagnosed by a triple probe divertor diagnostic system and fast reciprocating probes at the outer mid-plane. The experimental results show that the SOL width of double-null （DN） divertor plasmas in EAST appears to exhibit a negative dependence on the power crossing the separatrix, which is consistent with the collisional SOL scalings of JET and Alcator C-Mod. This will provide useful information for extrapolation to the ITER SOL width scaling for power deposition.
34-1187/TL
SOL width, DN divertor plasma, EAST tokamak
ISSN:1009-0630
DOI:10.1088/1009-0630/13/4/10