Simulation of ion cyclotron wave heating in the EXL-50U spherical tokamak based on dispersion relations

Haojie MA; Huasheng XIE; Bo LI

doi:10.1088/2058-6272/ad0d53

Plasma Science and Technology > 2024 > 26(2): 025105. > DOI: 10.1088/2058-6272/ad0d53

Haojie MA, Huasheng XIE, Bo LI. Simulation of ion cyclotron wave heating in the EXL-50U spherical tokamak based on dispersion relations[J]. Plasma Science and Technology, 2024, 26(2): 025105. DOI: 10.1088/2058-6272/ad0d53

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Simulation of ion cyclotron wave heating in the EXL-50U spherical tokamak based on dispersion relations

1.
School of Physics, Beihang University, Beijing 100191, People’s Republic of China
2.
Hebei Key Laboratory of Compact Fusion, Langfang 065001, People’s Republic of China
3.
ENN Science and Technology Development Co. Ltd., Langfang 065001, People’s Republic of China

More Information

Author Bio:
Bo LI: plasma@buaa.edu.cn
Corresponding author:
Bo LI, plasma@buaa.edu.cn
Received Date: June 17, 2023
Revised Date: October 17, 2023
Accepted Date: October 19, 2023
Available Online: February 03, 2024
Published Date: February 06, 2024

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Abstract

Abstract

This study investigates the single-pass absorption (SPA) of ion cyclotron range of frequency (ICRF) heating in hydrogen plasma of the EXL-50U spherical tokamak, which is an upgraded EXL-50 device with a central solenoid and a stronger magnetic field. The reliability of the kinetic dispersion equation is confirmed by the one-dimensional full-wave code, and the applicability of Porkolab's simplified theoretical SPA model is discussed based on the kinetic dispersion equation. Simulations are conducted to investigate the heating effects of the fundamental and second harmonic frequencies. The results indicate that with the design parameters of the EXL-50U device, the SPA for second harmonic heating is 63%, while the SPA for fundamental heating is 13%. Additionally, the optimal injection frequencies are 23 MHz at 0.9 T and 31 MHz at 1.2 T. The wave vector of the antenna parallel to the magnetic field, with a value of $k_{\|} = 7.5 \ \mathrm{m}^{-1}$ , falls within the optimal heating region. Simulations reveal that the ICRF heating system can play an important role in the ion heating of the EXL-50U.
- ion cyclotron range of frequency,
- single-pass absorption,
- spherical tokamak

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References (32)

References

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