A 28 GHz/50 kW continuous wave gyrotron with quasi-optical output
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摘要: 研制出国内首支基于电子回旋加热应用的28 GHz/50 kW准光输出大功率连续波回旋管。该回旋管采用了双阳极磁控注入枪，TE02模式谐振腔，内置准光模式变换器，单级降压收集极。回旋管采用无液氦制冷超导磁体提供稳态磁场。实验中成功实现54.8 kW/1 s短脉冲输出和45.8 kW/30 s的连续波输出，工作频率为28.08 GHz，总效率达到57%。Abstract: Aiming for electron cyclotron heating application in plasma fusion system, a 28 GHz 50 kW gyrotron has been developed and fabricated. The gyrotron employs a triode magnetron injection gun, a conventional cylindrical cavity working under TE02 mode, a built-in quasi-optical mode converter with conversion efficiency of about 95%. In the experiment, Gaussian beams of 54.8 kW for 1 s pulse and 45.6 kW for 30 s continuous wave at 28.08 GHz were achieved. The corresponding total efficiency is 57%.
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Key words:
- gyrotron /
- 28 GHz /
- electron cyclotron heating /
- continuous wave /
- quasi-optical output
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图 1 28 GHz/50 kW回旋管照片和实验装置
Figure 1. Photographs of the 28 GHz/50 kW gyrotron and experimental setup
图 3 20次1 s脉冲运行水负载实时功率波形
Figure 3. Transient power profile of operation with 20 1 s-width pulses tested by water load
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[1] Gregory S N, Manfred K A T, Michael I P. The gyrotron at 50: historical overview[J]. Journal of Infrared Millimeter and Terahertz Waves, 2014, 35: 325-381. doi: 10.1007/s10762-014-0050-7 [2] Denisov G. Recent results in IAP/GYCOM development of megawatt gyrotrons[C]//Proc of 43th Int Conf on Infrared Millimeter and Terahertz Waves. 2018. [3] Kariya T, Imai T, Minami R, et al. Development of over-MW gyrotrons for fusion at 14 GHz to sub-THz frequencies[J]. Nuclear Fusion, 2017, 57: 066001. doi: 10.1088/1741-4326/aa6875 [4] Kariya T, Minami R, Imai T, et al. Development of 28 GHz and 77 GHz, mega-watt gyrotrons for fusion devices[J]. Journal of Infrared Millimeter and Terahertz Waves, 2011, 32(3): 295-310. doi: 10.1007/s10762-010-9727-8 -
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