Physical mechanisms for the transition from type-III to large ELMs induced by impurity injection on EAST
Physical mechanisms for the transition from type-III to large ELMs induced by impurity injection on EAST
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EAST 上杂质注入诱导从 III 型到大型 ELM 转变的物理机制
DOI：
10.1016/j.physleta.2022.127988
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发表时间：
2022-02
期刊：
影响因子：
--
通讯作者：
Liang Wan
中科院分区：
文献类型：
--
作者：
Xin Lin;Guosheng Xu;Qingxi Yang;Ning Yan;Yu Wang;Y. Ye;Ping Zhu;Bin Cao;K.D. Li;Rende Chen;Ling Zhang;Qing Zang;Tao Zhang;Yang Wang;Guanghai Hu;Yichao Li;C. Zhou;Y.J. Chen;L.Y. Meng;X.D. Yang;Yanmin Duan;H.Q. Liu;F. Ding;Xi Chen;J. C. Xu;M.F. Wu;Liang Wan
Transition from type-III to large-amplitude ELMs induced by neon injection has been observed in the EAST tokamak at overlapping q 95 space between large and small ELMs. With neon injection, pedestal density gradient shows a remarkable increase accompanied by some decrease of pedestal electron temperature, and consequently the pressure gradient increases moderately and edge bootstrap current has minimal change. Further experiment demonstrates that the occurrence of large ELMs after neon injection is highly correlated with the change in edge density. Linear peeling-ballooning stability analysis indicates that the large ELM case is more unstable than the type-III ELM case during the ELM transition. A scan of pedestal density gradient in linear stability analysis shows that the direct destabilizing effect of steep pedestal density gradient on peeling-ballooning instabilities via two-fluid effects could also facilitate the transition to large ELMs. These results could provide more insight into the role of pedestal density gradient on pedestal stability and ELM behavior. • Transition from type-III ELMs to low-frequency large ELMs induced by impurity injection. • Direct destabilizing effect of steep density gradient on peeling-ballooning modes via two-fluid effects. • Strong correlation between ELM amplitude and pedestal density gradient.
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影响因子：
2.2
作者：
G. Huysmans;S. Sharapov;A. Mikhailovskii;W. Kerner
通讯作者：
G. Huysmans;S. Sharapov;A. Mikhailovskii;W. Kerner
影响因子：
3.3
作者：
G. Harrer;E. Wolfrum;M. Dunne;P. Manz;M. Cavedon;P. Lang;B. Kurzan;T. Eich;B. Labit;J. Stober;H. Meyer;M. Bernert;F. Laggner;F. Aumayr
通讯作者：
G. Harrer;E. Wolfrum;M. Dunne;P. Manz;M. Cavedon;P. Lang;B. Kurzan;T. Eich;B. Labit;J. Stober;H. Meyer;M. Bernert;F. Laggner;F. Aumayr
使用钨上部偏滤器在 EAST 放电中通过锂粉末注入消除 ELM
影响因子：
3.3
作者：
Maingi R;Hu J S;Sun Z;Tritz K;Zuo G Z;Xu W;Huang M;Meng X C;Canik J M;Diallo A;Lunsford R;Mansfield D K;Osborne T H;Gong X Z;Wang Y F;Li Y Y
通讯作者：
Li Y Y
EAST 上微波反射仪的密度分布和波动测量
影响因子：
1.7
作者：
Liu Zixi;Bu Jingliang;Li Jiangang;EAST Team
通讯作者：
EAST Team
DOI：
10.1063/1.4889777
发表时间：
2014-07
期刊：
The Review of scientific instruments
影响因子：
--
作者：
H. Liu;Y. Jie;W. Ding;D. Brower;Z. Zou;W. Li;Zhongli Wang;J. Qian;Yanji Yang;L. Zeng
通讯作者：
H. Liu;Y. Jie;W. Ding;D. Brower;Z. Zou;W. Li;Zhongli Wang;J. Qian;Yanji Yang;L. Zeng