期刊论文详细信息
Nuclear Fushion
Validation of the plasma-wall self-organization model for density limit in ECRH-assisted start-up of Ohmic discharges on J-TEXT
article
Jiaxing Liu1  Ping Zhu1  Dominique Franck Escande3  Junli Zhang1  Donghui Xia1  Yuhan Wang1  Jiaming Wang1  Qinghu Yang1  Jiangang Fang1  Xiaoqing Zhang1  Li Gao1  Zhifeng Cheng1  Zhipeng Chen1  Zhoujun Yang1  Zhongyong Chen1  Yonghua Ding1  Yuan Pan1 
[1] International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology;Department of Engineering Physics, University of Wisconsin-Madison;Aix-Marseille Université
关键词: density limit;    radiation;    plasma wall interaction;    ECRH;    J-TEXT;   
DOI  :  10.1088/1741-4326/ace91c
来源: Institute of Physics Publishing Ltd.
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【 摘 要 】

A recently developed plasma-wall self-organization model (Escandeet al2022Nucl. Fusion62026001) predicts a significantly enhanced density limit, which may be attainable in tokamaks with ECRH-assisted Ohmic start-up and sufficiently high initial neutral density. Experiments have been conducted on J-TEXT to validate such a density limit scenario based on this model. Experimental results demonstrate that increasing the pre-filled gas pressure or ECRH power during the start-up phase can help effectively enhance plasma purity and raise the density limit at the flat-top phase. The experimental data shows that density limit increases by a ratio 0.76/0.6 approx 1.27for a decrease by a factor 0.13/0.33 approx 0.4in ext{C}_ext{III}radiation.

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