Relationship of mode transitions and standing waves in helicon plasmas

Mingyang WU; Chijie XIAO; Xiaogang WANG; Yue LIU; Min XU; Chang TAN; Tianchao XU; Xiuming YU; Renchuan HE; Andong XU

doi:10.1088/2058-6272/ac567d

Plasma Science and Technology > 2022 > 24(5): 055002. > DOI: 10.1088/2058-6272/ac567d

Mingyang WU, Chijie XIAO, Xiaogang WANG, Yue LIU, Min XU, Chang TAN, Tianchao XU, Xiuming YU, Renchuan HE, Andong XU. Relationship of mode transitions and standing waves in helicon plasmas[J]. Plasma Science and Technology, 2022, 24(5): 055002. DOI: 10.1088/2058-6272/ac567d

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Relationship of mode transitions and standing waves in helicon plasmas

1.
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Fusion Simulation Center, Peking University, Beijing 100871, People's Republic of China
2.
Department of Physics, Institute of Space Environment and Matter Science, Harbin Institute of Technology, Harbin 150001, People's Republic of China
3.
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China
4.
Center for Fusion Science of Southwestern Institute of Physics, Chengdu 610041, People's Republic of China
5.
Shaanxi Key Laboratory of Plasma Physics and Applied Technology, Xi'an 710100, People's Republic of China
6.
Xi'an Aerospace Propulsion Institute, Xi'an 710100, People's Republic of China

More Information

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

Xiaogang WANG, E-mail: xgwang@hit.edu.cn
Received Date: September 13, 2021
Revised Date: February 13, 2022
Accepted Date: February 16, 2022
Available Online: December 11, 2023
Published Date: May 08, 2022

Graphical Abstract

Abstract

Abstract

Helicon wave plasma sources have the well-known advantages of high efficiency and high plasma density, with broad applications in many areas. The crucial mechanism lies with mode transitions, which has been an outstanding issue for years. We have built a fluid simulation model and further developed the Peking University Helicon Discharge code. The mode transitions, also known as density jumps, of a single-loop antenna discharge are reproduced in simulations for the first time. It is found that large-amplitude standing helicon waves (SHWs) are responsible for the mode transitions, similar to those of a resonant cavity for laser generation. This paper intends to give a complete and quantitative SHW resonance theory to explain the relationship of the mode transitions and the SHWs. The SHW resonance theory reasonably explains several key questions in helicon plasmas, such as mode transition and efficient power absorption, and helps to improve future plasma generation methods.
- helicon plasma,
- mode transition,
- standing wave resonance

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Acknowledgments

We would like to acknowledge Y Lang for useful discussions. This project was supported by the National Key R & D Program of China (No. 2017YFE0301201) and National Natural Science Foundation of China (No. 11975038). We acknowledge the funding support from the State Key Laboratory of Nuclear Physics and Technology, Peking University (No. NPT2021ZZ03).

References (37)

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