Three-dimensional simulations of RF wave propagation and power coupling in cold magnetized plasma near an ICRF antenna

doi:10.1088/1674-1056/ad9a9c

中国物理B ›› 2025, Vol. 34 ›› Issue (2): 25204-025204.doi: 10.1088/1674-1056/ad9a9c

Three-dimensional simulations of RF wave propagation and power coupling in cold magnetized plasma near an ICRF antenna

Lei-Yu Zhang(张雷宇), Yi-Xuan Li(李屹轩), and Quan-Zhi Zhang(张权治)†

School of Physics, Dalian University of Technology, Dalian 116024, China

收稿日期:2024-10-29 修回日期:2024-12-02 接受日期:2024-12-05 出版日期:2025-02-15 发布日期:2025-01-15
通讯作者: Quan-Zhi Zhang E-mail:qzzhang@dlut.edu.cn
基金资助:
Project supported by the National MCF Energy Research and Development Program (Grant No. 2022YFE03190100), the National Natural Science Foundation of China (Grant Nos. 12422513, 12105035, and U21A20438), and the Xiaomi Young Talents Program.

Three-dimensional simulations of RF wave propagation and power coupling in cold magnetized plasma near an ICRF antenna

Lei-Yu Zhang(张雷宇), Yi-Xuan Li(李屹轩), and Quan-Zhi Zhang(张权治)†

School of Physics, Dalian University of Technology, Dalian 116024, China

Received:2024-10-29 Revised:2024-12-02 Accepted:2024-12-05 Online:2025-02-15 Published:2025-01-15
Contact: Quan-Zhi Zhang E-mail:qzzhang@dlut.edu.cn
Supported by:
Project supported by the National MCF Energy Research and Development Program (Grant No. 2022YFE03190100), the National Natural Science Foundation of China (Grant Nos. 12422513, 12105035, and U21A20438), and the Xiaomi Young Talents Program.

摘要/Abstract

摘要： The electromagnetic wave propagations and their coupling characteristics in magnetized plasma near the antenna of ion cyclotron range of frequencies (ICRF) is studied based on self-developed 3DFEM-IA code. This code effectively resolves the three-dimensional (3D) geometry and the electromagnetic field using the finite element method. Our findings reveal that the distributions of electromagnetic fields and energy flow density significantly depend on the antenna phases, surface current density on the antenna straps, and background plasma density. Notably, the non-uniform surface current density on the antenna straps, resulting from the presence of induced currents, contributes to a reduction in coupling power within the edge plasma. Furthermore, the calculated coupling impedance increases with plasma density, corroborating well with experimental measurements.

关键词: magnetized plasma, antenna of ion cyclotron range of frequencies (ICRF), power coupling

Abstract: The electromagnetic wave propagations and their coupling characteristics in magnetized plasma near the antenna of ion cyclotron range of frequencies (ICRF) is studied based on self-developed 3DFEM-IA code. This code effectively resolves the three-dimensional (3D) geometry and the electromagnetic field using the finite element method. Our findings reveal that the distributions of electromagnetic fields and energy flow density significantly depend on the antenna phases, surface current density on the antenna straps, and background plasma density. Notably, the non-uniform surface current density on the antenna straps, resulting from the presence of induced currents, contributes to a reduction in coupling power within the edge plasma. Furthermore, the calculated coupling impedance increases with plasma density, corroborating well with experimental measurements.

Key words: magnetized plasma, antenna of ion cyclotron range of frequencies (ICRF), power coupling

中图分类号: (Magnetized plasmas)

52.25.Xz

52.40.Fd (Plasma interactions with antennas; plasma-filled waveguides) 52.50.Qt (Plasma heating by radio-frequency fields; ICR, ICP, helicons) 52.65.-y (Plasma simulation)

Lei-Yu Zhang(张雷宇), Yi-Xuan Li(李屹轩), and Quan-Zhi Zhang(张权治). Three-dimensional simulations of RF wave propagation and power coupling in cold magnetized plasma near an ICRF antenna[J]. 中国物理B, 2025, 34(2): 25204-025204.

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Three-dimensional simulations of RF wave propagation and power coupling in cold magnetized plasma near an ICRF antenna

Three-dimensional simulations of RF wave propagation and power coupling in cold magnetized plasma near an ICRF antenna

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