Evidence of Partial Reconnection during Sawtooth Crash on EAST ELM-Free H-Mode LHCD Plasma

被引：1
|
作者：
Xu, Liqing [1 ]
Hu, Liqun [1 ]
Ma, Tianpeng [2 ]
机构：
[1] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[2] North Univ Ethn, Fdn Dept, Yinchuan 750021, Peoples R China
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2014年 / 83卷 / 02期
关键词：
COMPUTER-TOMOGRAPHY; DETECTOR ARRAYS; WT-3; TOKAMAK; OSCILLATIONS;
D O I：
10.7566/JPSJ.83.024501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Double q = 1 surfaces during a sawtooth crash were identified in EAST ELM-free H-mode LHCD plasma. An off-axis-peaking and enhanced soft-X-ray (SXR) profile due to the presence of high-Z impurities accumulated in the plasma core region is observed after a sawtooth crash. The observed sawtooth oscillations with a nonmonotonic q profile can be explained satisfactorily by the partial reconnection model. Considerable high-Z impurities near the plasma centre are a response to the formation of double q = 1 surfaces.
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页数：4
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