紧凑型L波段磁绝缘线振荡器的实验研究
Experimental investigation of a compact L-band magnetically insulated transmission line oscillator
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摘要: 设计加工了一个紧凑型L波段磁绝缘线振荡器(MILO)并进行了实验研究。该MILO具有一个新型收集极和一个新型模式转换器，射频扼流腔减为一个，同时将阴极杆设计成变阻抗结构，该MILO由一台自建的600kV,8Ω，100ns加速器SPARK01驱动。在二极管电压为515～538kV, 二极管电流为58～61kA的条件下, 该MILO在实验中获得了1.76～1.78GHz， 2.2～2.5GW的TM01模高功率微波辐射, 功转换效率为7.3%～7.9%。在30ns的有效电压脉宽下，实验中测得微波脉冲半高宽为15ns。实验结果与模拟结果符合得较好。Abstract: A compact L-band magnetically insulated transmission line oscillator(MILO),which has a new-type mode converter and a vewtype beam dump which increases a beam dump disk,a noe-cavity RF choke and a carefully designed impedance discontinuity between the choke-vane section and the SWS-vane section, is experimentally investigated. The compact MILO is driven by a self-built 600kV, 8Ω, 100ns pulser:SPARK０１.When the input voltage is 515～538kV, and the diode current is 58～61kA, high power microwaves of the TM01 mode are generated from the device with a frequency of 1.76～1.78GHz, an output power of 2.2～2.5GW, and the power conversion efficiency of 7.3%～7.9% in experiments. In this case, the duration of the effective voltage (above the threshold voltage, 500kV) is 30ns, and the duration o
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