Nuclear Fusion (Jan 2023)
Interplay among turbulence, flow and impurities for sustaining magnetic island
- Xi Feng,
- Xiang Chen,
- XiaoLan Zou,
- ADi Liu,
- HuiShan Cai,
- Ge Zhuang,
- Chu Zhou,
- T.B. Wang,
- M.K. Han,
- Y.M. Duan,
- L. Zhang,
- S.X. Wang,
- Y.Y. Li,
- T.H. Shi,
- T.F. Zhou,
- H.L. Zhao,
- Y.M. Wang,
- M.Y. Wang,
- H.Q. Liu,
- Y. Liu,
- W.X. Ding,
- S.B. Zhang,
- M.Q. Wu,
- X. Zhu,
- B.L. Hao,
- J.L. Xie,
- X.D. Lin,
- J.J. Huang,
- X. Gao,
- Y.X. Wan
Affiliations
- Xi Feng
- College of Physics and Optoelectronic Engineering, Shenzhen University , Shenzhen 518060, China; Advanced Energy Research Center, Shenzhen University , Shenzhen 518060, China
- Xiang Chen
- ORCiD
- School of Nuclear Science and Technology, University of Science and Technology of China , Hefei, Anhui 230026, China
- XiaoLan Zou
- Institute for Magnetic Fusion Research, CEA , Saint-Paul-lez-Durance F-13115, France
- ADi Liu
- ORCiD
- School of Nuclear Science and Technology, University of Science and Technology of China , Hefei, Anhui 230026, China
- HuiShan Cai
- ORCiD
- School of Nuclear Science and Technology, University of Science and Technology of China , Hefei, Anhui 230026, China
- Ge Zhuang
- School of Nuclear Science and Technology, University of Science and Technology of China , Hefei, Anhui 230026, China
- Chu Zhou
- School of Nuclear Science and Technology, University of Science and Technology of China , Hefei, Anhui 230026, China
- T.B. Wang
- ORCiD
- Southwestern Institute for Physics CNNC , C-610200 Chengdu, China
- M.K. Han
- ORCiD
- Southwestern Institute for Physics CNNC , C-610200 Chengdu, China
- Y.M. Duan
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- L. Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- S.X. Wang
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- Y.Y. Li
- ORCiD
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- T.H. Shi
- ORCiD
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- T.F. Zhou
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- H.L. Zhao
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- Y.M. Wang
- ORCiD
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- M.Y. Wang
- ORCiD
- Hebei Key Laboratory of Compact Fusion , Langfang 065001, China; ENN Science and Technology Development Co., Ltd, Langfang 065001, China
- H.Q. Liu
- ORCiD
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- Y. Liu
- ORCiD
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- W.X. Ding
- School of Nuclear Science and Technology, University of Science and Technology of China , Hefei, Anhui 230026, China
- S.B. Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- M.Q. Wu
- ORCiD
- Advanced Energy Research Center, Shenzhen University , Shenzhen 518060, China
- X. Zhu
- Advanced Energy Research Center, Shenzhen University , Shenzhen 518060, China
- B.L. Hao
- Advanced Energy Research Center, Shenzhen University , Shenzhen 518060, China
- J.L. Xie
- School of Nuclear Science and Technology, University of Science and Technology of China , Hefei, Anhui 230026, China
- X.D. Lin
- Advanced Energy Research Center, Shenzhen University , Shenzhen 518060, China
- J.J. Huang
- Advanced Energy Research Center, Shenzhen University , Shenzhen 518060, China
- X. Gao
- ORCiD
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- Y.X. Wan
- Institute of Plasma Physics, Chinese Academy of Sciences , Hefei, Anhui 230031, China
- DOI
- https://doi.org/10.1088/1741-4326/ad0b1d
- Journal volume & issue
-
Vol. 64,
no. 1
p. 016006
Abstract
As ubiquitous structures in magnetized fusion plasmas, magnetic islands (MIs) would short-circuit adjacent magnetic flux surfaces and result in a reduced pressure gradient and fluctuations inside the island; it is widely accepted that due to the stabilizing of drift wave instability, the turbulence intensity inside MIs is much lower for larger islands. Here, we provide the first observations that strong turbulence could be generated inside a large radiation MI, which is probably driven by the electron temperature dip due to strongly localized impurity radiation. Moreover, the flow velocity inside the MI is strongly correlated with the turbulence intensity, and the impurity concentration rate suddenly increases as the flow velocity reaches a threshold value, strongly suggesting that turbulence and flow inside the island play important roles in trapping heavy impurities and sustaining radiative MIs.
Keywords
