| Citation: |
Linlin HU, Dimin SUN, Qili HUANG, Tingting ZHUO, Guowu MA, Yi JIANG, Shenggang GONG, Zaojin ZENG, Zixing GUO, Chaohai DU, Fanhong LI, Hongbin CHEN, Fanbao MENG, Hongge MA. Design and preliminary test of a 105/140 GHz dual-frequency MW-level gyrotron[J]. Plasma Science and Technology, 2022, 24(3): 035601. DOI: 10.1088/2058-6272/ac2b8f
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A dual-frequency (105/140 GHz) MW-level continuous-wave gyrotron was developed for fusion application at Institute of Applied Electronics, China Academy of Engineering Physics. This gyrotron employs a cylindrical cavity working in the TE18, 7 mode at 105 GHz and the TE24, 9 mode at 140 GHz. A triode magnetron injection gun and a built-in quasi-optical mode converter were designed to operate at these two frequencies. For the proof-test phase, the gyrotron was equipped with a single-disk boron nitride window to achieve radio frequency output with a power of ~500 kW for a short-pulse duration. In the preliminary short-pulse proof-test in the first quarter of 2021, the dual-frequency gyrotron achieved output powers of 300 kW at 105 GHz and 540 kW at 140 GHz, respectively, under 5 Hz 1 ms continuous pulse-burst operations. Power upgrade and pulse-width extension were hampered by the limitation of the high-voltage power supply and output window. This gyrotron design was preliminarily validated.
This work is supported in part by NSAF (No. U1830201), in part by the State Administration of Science, Technology and Industry for Nation Defense of China, Technology Foundation Project (No. JSJL2019212B006), in part by the Academy Innovation Funder (No. CX2020038), and in part by the National Defense Basic Scientific Research Program (No. 2018212C015).
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