设计了一个过模太赫兹返波管振荡器,通过对慢波结构的精心设计,使电子束动能得到充分提取,实现器件的大功率及高效率运行。在电子能量和束流分别为280keV和320A的条件下,当引导磁场强度为3T时,采用2.5维Particle in Cell(PIC)程序模拟得到频率为121.8GHz、功率为13MW的太赫兹波输出,器件的束波转换效率约为14.5%。
【英文摘要】
By elaborately designing the slow wave structure(SWS),an oversized terahertz backward wave oscillator(BWO)with high output power and high beam-wave conversion efficiency is presented and the 2.5-D particle-in-cell simulations are carried out using a PIC code.Under the condition of 280 kV voltage and 320 Acurrent,the output power of 130 MW at frequency of121.8GHz is achieved when the strength of the guiding magnetic field is 3T,and the beam-wave power efficiency of 14.5 %is obtained.