W波段连续波30 kW回旋振荡管高频系统和收集极的设计
Design of interaction circuit and collector for W-band continuous wave 30 kW gyrotron oscillator
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摘要: 根据回旋管的电子回旋脉塞理论，借助于编写的回旋振荡管自洽非线性注-波互作用计算程序，设计出了工作频率94 GHz、工作电压30 kV、工作电流3 A的基次谐波连续波单腔回旋振荡管，工作模式为TE02模。设计的回旋振荡管在电压30.0 kV、电流3.0 A、速度横纵比1.5的条件下，获得了31.8 kW的输出功率，电子效率约35％。利用粒子模拟仿真软件对设计的回旋管收集极辅助线包散焦系统进行了粒子模拟仿真分析，模拟结果表明：借助于辅助线包散焦系统可以有效缩短回旋振荡管的轴向尺寸，并使回旋管收集极上的电子束功率密度低于500 W/cm2； W波段回旋振荡管收集极的热测试验结果表明：利用粒子模拟仿真获得的收集极上的电子束功率密度分布与其试验测量结果比较吻合。Abstract: A W-band fundamental harmonic continuous wave single-cavity gyrotron oscillator with the operating mode TE02 has been designed according to the electron cyclotron maser theory of gyrotron with self-consistent nonlinear beam-wave interaction code. The simulation result shows that the output power and the electron efficiency of the designed gyrotron oscillator is 31.8 kW and 35%, respectively, on the basis of the electron beam with voltage 30 kV, current 3.0 A and velocity ratio 1.5. In addition, the design and simulation of the gyrotron oscillator’s collector has been finished with the help of PIC software. The simulation result indicates that the power density on the collector wall would be less than 500 W/cm2 by using auxiliary coils which can effectively shorten the axial size of the
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Key words:
- w-band /
- continuous wave /
- gyrotron oscillator /
- interaction circuit /
- collector
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