8 mm带状注扩展互作用振荡器研究

8 mm Sheet-Beam Extended Interaction Oscillator

摘要: 研究了采用带状电子束的周期加载矩形扩展互作用振荡器,分析该结构的优点、色散特性和耦合阻抗,并利用模拟软件进行了冷腔分析。设计出了工作波长为8 mm的腔体结构,分析了工作模式为TM31模的场分布。按照冷腔设计结果进行了PIC粒子模拟,电压为19 kV、电流为3 A的带状电子束在纵向磁场为0.3 T的约束下与腔体中的TM31模电磁波互作用。模拟结果表明,电磁波的输出波频率为37.9 GHz,功率为3.5 kW,验证了在该结构中带状注与高次模互作用的设计思想。

Abstract: A millimeter wave sheet-beam extended interaction oscillator (SBEIO) operating at TM31 is studied.The dispersion characteristic and coupling impedance of the slow-wave structure are analyzed and the slow-wave structure for 8 mm SBEIO is designed with CST code.With the simulation of the PIC software,CHPIC code,when the SBEIO operates at TM31 at 2π point with the beam voltage 19kV,current 3 A,and longitudinal magnetic field 0.3 T,the operating frequency is 37.9 GHz and the output power is over 3.5 kW.The simulation results agree well with the design values.