Experimental observation of the transport induced by ion Bernstein waves near the separatrix of magnetic nulls

Renchuan HE; Xiaoyi YANG; Chijie XIAO; Xiaogang WANG; Tianchao XU; Zhibin GUO; Yue GE; Xiuming YU; Zuyu ZHANG; Rui KE; Ruixin YUAN

doi:10.1088/2058-6272/ac770b

Plasma Science and Technology > 2022 > 24(11): 115001. > DOI: 10.1088/2058-6272/ac770b

Renchuan HE, Xiaoyi YANG, Chijie XIAO, Xiaogang WANG, Tianchao XU, Zhibin GUO, Yue GE, Xiuming YU, Zuyu ZHANG, Rui KE, Ruixin YUAN. Experimental observation of the transport induced by ion Bernstein waves near the separatrix of magnetic nulls[J]. Plasma Science and Technology, 2022, 24(11): 115001. DOI: 10.1088/2058-6272/ac770b

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Experimental observation of the transport induced by ion Bernstein waves near the separatrix of magnetic nulls

1.
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China
2.
Department of Physics, Harbin Institute of Technology, Harbin 150001, People's Republic of China
3.
Center for Fusion Science of Southwestern Institute of Physics, Chengdu 610041, People's Republic of China

More Information

Corresponding author:
Chijie XIAO, E-mail: cjxiao@pku.edu.cn

Tianchao XU, E-mail: xutianchao90@126.com
Received Date: February 14, 2022
Revised Date: June 06, 2022
Accepted Date: June 07, 2022
Available Online: December 05, 2023
Published Date: August 21, 2022

Graphical Abstract

Abstract

Abstract

The waves in a magnetic null could play important roles during 3D magnetic reconnection. Some preliminary clues in this paper show that the ion Bernstein wave (IBW) may be closely related to transport process in magnetic null region. The magnetic null configuration experiment reported here is set up in a linear helicon plasma device, Peking University plasma test device (PPT). The wave modes with frequencies between the first and third harmonics of local ion cyclotron frequency (ω_ci) are observed in the separatrix of magnetic null, which are identified as the IBW based on the dispersion relation. Further analysis shows that IBW could drive substantial particle flux across the magnetic separatrix. The theoretical radial particle flux driven by IBW and the measured parallel flow in PPT device are almost on the same order, which shows that IBW may play an important role during 3D reconnection process.
- separatrix,
- ion Bernstein wave,
- particle transport,
- magnetic null,
- magnetic reconnection

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Acknowledgments

This work was supported by National Natural Science Foundation of China (No. 11975038) and the National MCF Energy R&D Program of China (Nos. 2017YFE0300601 and 2018YFE0311400).

References (23)

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