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

doi:10.1088/1674-1056/ad9a9c

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.

Keywords: magnetized plasma antenna of ion cyclotron range of frequencies (ICRF) power coupling

Received: 29 October 2024
Revised: 02 December 2024
Accepted manuscript online: 05 December 2024

PACS:	52.25.Xz	(Magnetized plasmas)
	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)

Fund: 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.

Corresponding Authors: Quan-Zhi Zhang
E-mail: qzzhang@dlut.edu.cn

Cite this article:

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 2025 Chin. Phys. B 34 025204

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

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