Fan Yuwei, Li Sirui, Wang Xiaoyu, Li Ankun, Yu Yuanqiang, Liu Zeyang
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
Rev Sci Instrum. 2019 Apr;90(4):044704. doi: 10.1063/1.5080514.
In the experiments of a magnetically insulated transmission line oscillator (MILO), the initiatory microwave frequency is slightly higher than the stable microwave frequency. This paper investigates the influence of the front edge of the voltage on microwave frequency. The theoretical analysis shows that the MILO operates at the 2π mode in the initiatory stage; therefore, the microwave frequency is determined by the single slow wave structure (SWS) cavity. During the stable operation, the MILO works at the π mode and the microwave frequency is decided by the structure parameters of the resonant cavity chain. It is a fact that the resonant frequency of a single SWS cavity is higher than that of the resonant cavity chain, so the reason why the initiatory microwave frequency is slightly higher than the stable microwave frequency can be explained. The simulation results agree with the theoretical results.
在磁绝缘传输线振荡器（MILO）的实验中，初始微波频率略高于稳定微波频率。本文研究了电压前沿对微波频率的影响。理论分析表明，MILO在初始阶段以2π模式运行；因此，微波频率由单个慢波结构（SWS）腔决定。在稳定运行期间，MILO以π模式工作，微波频率由谐振腔链的结构参数决定。单个SWS腔的谐振频率高于谐振腔链的谐振频率，这一事实可以解释初始微波频率略高于稳定微波频率的原因。仿真结果与理论结果一致。
