Experimental study of single-translated field-reversed configuration in KMAX

Hui LIAO; Chaoqi HU; Yilin LI; Baoming REN; Xuan SUN

doi:10.1088/2058-6272/ac64f1

Plasma Science and Technology > 2022 > 24(9): 095103. > DOI: 10.1088/2058-6272/ac64f1

Hui LIAO, Chaoqi HU, Yilin LI, Baoming REN, Xuan SUN. Experimental study of single-translated field-reversed configuration in KMAX[J]. Plasma Science and Technology, 2022, 24(9): 095103. DOI: 10.1088/2058-6272/ac64f1

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Experimental study of single-translated field-reversed configuration in KMAX

Department of Plasma Physics and Fusion Engineering, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, People's Republic of China

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Corresponding author:
Xuan SUN, E-mail: xsun@ustc.edu.cn
Received Date: January 13, 2022
Revised Date: April 02, 2022
Accepted Date: April 05, 2022
Available Online: December 07, 2023
Published Date: July 12, 2022

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Abstract

Abstract

For collisional merging field-reversed configurations (FRCs), it is desired to have both FRCs tuned to be approximately the same, as well as to optimize each FRC to have high temperature and high translation speed so as to retain most of the equilibrium flux after traveling a distance to the middle plane for merging. The present study reports the experimental study of a single-translated FRC in the KMAX-FRC device with various diagnostics, including a triple probe, a bolometer, several magnetic probe arrays, and a novel 2D internal magnetic probe array. According to the measurements conducted in the present study, a maximum toroidal magnetic field equal to ~1/3 of the external magnetic field inside the FRC separatrix radius is observed, and the typical parameters of a single-translated FRC near the device's mid-plane are n_e~(2–4)×10¹⁹ m^-3, T_e~8 eV, T_i~5 eV, r_s ~0.2 m, l_s ~0.6 m and ϕ_p(RR) ~0.2 mWb. The 2D magnetic topology measurement revealed, for the first time, the time evolution of the overall internal magnetic fields of a single-translated FRC, and an optimized operation regime is given in the paper.
- field-reversed configuration,
- FRC formation,
- FRC translation,
- probe measurement

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Acknowledgments

This work was supported by the National Key R&D Program of China (No. 2017YFE0301802) and National Natural Science Foundation of China (No. 12175226).

References (31)

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