105 GHz折叠波导EIO的研究和初步实验

Study and Preliminary Experiment of 105 GHz Extended Interaction Oscillator with Folded Waveguide

摘要: 采用折叠波导作为扩展互作用振荡器(EIO)的慢波谐振系统,对105 GHz EIO进行了系统的研究,包括慢波系统的色散特性和阻抗、起振电流随周期数的变化。设计了输出窗和电子枪结构,进行了PIC注波互作用模拟,EIO的模拟输出功率约26~50 W,频率约105.26~105.31 GHz。探讨了慢波系统的加工方式,加工了慢波系统、输出窗和电子枪结构,完成了初步试验,进行了相应的冷测和热测,测试了慢波系统的谐振特性、输出窗的传输特性以及电子枪发射性能和流通性。

Abstract: In this paper, a folded waveguide was adopted as the slow wave structure (SWS) of the extended interaction oscillator (EIO). An EIO with frequency 105 GHz was studied in detail, including the dispersion relation and the impedance of the SWS, the starting current varying with the period number, the structure of the window and the electron gun (E-gun), and the PIC simulation of the beam-wave interaction with output power 26~50 W and the corresponding frequency 105.26~105.31 GHz. The machining method of the SWS was investigated for fabricating the SWS and the window as well as the E-gun. The preliminary experiment of cold test and hot test was finished, including the performance of the SWS, the window and the E-gun with current density up to 100A/cm2.