First study of EAST divertor by impurities puffing
First study of EAST divertor by impurities puffing
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DOI：
10.1016/j.jnucmat.2010.12.040
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发表时间：
2011-08
影响因子：
3.1
通讯作者：
Zhenwei Wu;Houyang Y Guo;Yixue Chen;D. S. Wang;G. Luo;Xiang Gao;W. Gao;Liqing Zhang;W. Zha;D. Kato;I. Murakami;Wei Zhang;Jing Yang;Jing Wu;Sizheng Zhu;Jianguo Wu;Hua-yong Chen;Liqun Hu;B. Wan;Jiuyuan Li
中科院分区：
文献类型：
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作者：
Zhenwei Wu;Houyang Y Guo;Yixue Chen;D. S. Wang;G. Luo;Xiang Gao;W. Gao;Liqing Zhang;W. Zha;D. Kato;I. Murakami;Wei Zhang;Jing Yang;Jing Wu;Sizheng Zhu;Jianguo Wu;Hua-yong Chen;Liqun Hu;B. Wan;Jiuyuan Li
近年来，在不同等离子体条件下进行了一系列的EAST实验，研究了基本导流器的性能、导流器和溶胶的筛选效率以及辐射导流器的效果。分离的分流等离子体已通过密度增大实现。发现低场侧（LFS）的CIII发射与甲烷（CH4）膨化实验的极向位置和等离子体操作机制有很强的依赖性。此外，通过向外导流室注入混合Ar （D2中Ar含量为5.7%）的辐射导流器实验，使外靶板处的峰值热流密度降低了50%，同时也降低了导流器等离子体温度。改善了进出热流密度分布的不对称性。
A series of experiments has recently been carried out in EAST under different plasma conditions to investigate the basic divertor performance, divertor and SOL screening efficiency and radiative divertor effect. Detached divertor plasmas have been achieved by density ramp-up. It is found that CIII emission from the low-field side (LFS) exhibits a strong dependence on poloidal locations and plasma operation regimes from methane (CH4) puffing experiments. In addition, the radiative divertor experiments by injection of mixed Ar (5.7% Ar in D2) into the outer divertor chamber reduce the peak heat flux by 50% at the outer target plate, which also reduce the divertor plasma temperature. The in–out heat flux distribution asymmetry is improved.