Nuclear Fusion (Jan 2022)
Experimental study of the core instability before and after internal transport barrier formation in EAST
- Mingfu Wu,
- Zixi Liu,
- Gongshun Li,
- Xiang Han,
- Tao Zhang,
- Yingying Li,
- Tianfu Zhou,
- Yan Chao,
- Shouxin Wang,
- Xiaohe Wu,
- Kangning Geng,
- Haoming Xiang,
- Fubin Zhong,
- Kaixuan Ye,
- Jia Huang,
- Zhen Zhou,
- Shuqi Yang,
- Fei Wen,
- Yumin Wang,
- Shoubiao Zhang,
- Ge Zhuang,
- Xiang Gao,
- the EAST Team
Affiliations
- Mingfu Wu
- ORCiD
- University of Science and Technology of China , Hefei, Anhui 230026, China; Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Zixi Liu
- University of Science and Technology of China , Hefei, Anhui 230026, China
- Gongshun Li
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Xiang Han
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Tao Zhang
- ORCiD
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Yingying Li
- ORCiD
- Hebei Key Laboratory of Compact Fusion , Langfang 065001, China; ENN Science and Technology Development Co., Ltd. , Langfang 065001, China
- Tianfu Zhou
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Yan Chao
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Shouxin Wang
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Xiaohe Wu
- University of Science and Technology of China , Hefei, Anhui 230026, China; Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Kangning Geng
- ORCiD
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Haoming Xiang
- ORCiD
- Advanced Energy Research Center, Shenzhen University , Shenzhen 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University , Shenzhen 518060, China
- Fubin Zhong
- Advanced Energy Research Center, Shenzhen University , Shenzhen 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University , Shenzhen 518060, China
- Kaixuan Ye
- ORCiD
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Jia Huang
- University of Science and Technology of China , Hefei, Anhui 230026, China; Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Zhen Zhou
- Department of Physics, Nanchang University , Jiangxi, Nanchang 330031, China; Jiangxi Province Key Laboratory of Fusion and Information Control, Nanchang University , Jiangxi, Nanchang 330031, China
- Shuqi Yang
- University of Science and Technology of China , Hefei, Anhui 230026, China; Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Fei Wen
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Yumin Wang
- Hebei Key Laboratory of Compact Fusion , Langfang 065001, China; ENN Science and Technology Development Co., Ltd. , Langfang 065001, China
- Shoubiao Zhang
- Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- Ge Zhuang
- University of Science and Technology of China , Hefei, Anhui 230026, China
- Xiang Gao
- ORCiD
- University of Science and Technology of China , Hefei, Anhui 230026, China; Institute of Plasma Physics , Chinese Academy of Science, PO Box 1126, Hefei 230031, China
- the EAST Team
- DOI
- https://doi.org/10.1088/1741-4326/aca10b
- Journal volume & issue
-
Vol. 63,
no. 1
p. 016008
Abstract
In a reversed shear discharge in the Experimental Advanced Superconducting Tokamak (EAST), an internal transport barrier (ITB) was formed. For the first time, the turbulence in the plasma core before and after the formation of the ITB in EAST was investigated by microwave reflectometry. It was found that during the formation of the ITB, the turbulence inside the barrier was not completely suppressed. The density fluctuation level decreased in the early phase of ITB and significantly increased later. It was found that the density fluctuation level increased with the density gradient after the appearance of reversed shear Alfvén eigenmodes (RSAEs). The change in turbulence, measurable by the reflectometer, did not affect the rate of increase in core density. Through the measurement of RSAEs, it was found that the formation of this ITB may be related to the minimum q ( q _min ). q _min was close to 2.
Keywords
