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根据两腔振荡器和返波管的特点提出了准两腔振荡器,其作用机理是两腔振荡器的机理,结构类似返波管.这种结构主要由调制腔组和换能腔组两部分组成,调制腔组实现电子束速度调制,调制后的电子束在通过一个微波场较弱的区间时实现电子束群聚,然后在换能腔组实现电子能量到微波能量的转化,并通过输出结构输出;同时,调制腔组和换能腔组之间存在微波耦合,换能腔组中的一部分微波能量可以耦合到调制腔组,形成一个正反馈回路,在一定条件下实现微波振荡.根据此理论,根据Sinus-700加速器的参数(800kV,10kA)设计了一个X波段的高功率微波器件,2.5维Particle in Cell(PIC)程序模拟的效率为28%,微波频率为9.42GHz,微波输出功率为2.25GW,实验上得到的微波输出为微波频率9.40GHz,微波输出功率2.44GW.
According to the characteristics of the two-cavity oscillator and the return-dip tube, a quasi-two-cavity oscillator is proposed. The mechanism of the two-cavity oscillator is similar to that of the two-cavity oscillator. The structure of the two- Part of the modulation chamber group to achieve electron beam velocity modulation, the modulated electron beam in the microwave field through a weaker interval to achieve electron beam cluster, and then in the transducer group to achieve the electronic energy to microwave energy conversion, and through Output structure. At the same time, there is microwave coupling between the modulation cavity group and the transducer cavity group, and a part of the microwave energy in the transducer cavity group can be coupled to the modulation cavity group to form a positive feedback loop for microwave oscillation under certain conditions. According to this theory, an X-band high power microwave device is designed according to the parameters of the Sinus-700 accelerator (800kV, 10kA). The 2.5-D Particle in Cell PIC simulation program has an efficiency of 28%, a microwave frequency of 9.42GHz, The output power is 2.25GW. The experimentally obtained microwave output is 9.40GHz with microwave frequency and 2.44GW with microwave output power.