紧凑型L波段磁绝缘线振荡器的实验研究

 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。

Experimental investigation of a compact L-band magnetically insulated transmission line oscillator

A compact L-band magnetically insulated transmission line oscillator(MILO),which has a new-type mode converter and a vew-type 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:SPARK-01.When the input voltage is 515～538kV, and the diode current is 58～61kA, high power microwaves of the TM_(01) 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 of the radiated microwave is 15ns (FWHM). The experimental results agree well with that of simulation.