中文摘要：

对一种热阴极高功率返波管进行了理论研究,其具有寿命长稳定性好的特点.采用的热阴极发射电流密度为20 A/cm2,发射面积为100 cm2,发射总电流为2 kA.首先对该热阴极单阳极电子枪进行仿真研究,在确保不打火的情况下获得电子枪优化设计参数,再对整管进行粒子模拟研究,仿真结果表明,在工作频率为10.5 GHz时,该热阴极返波管的输出功率可以达到290 MW,换能效率为29％.

英文摘要：

A high power backward-wave oscillator （BWO） with a hot cathode is theoretically studied,which has a long life and good stability.Firstly,a single anode electron gun with a hot cathode is simulated by PIC software.The cmission current density and the area of the hot cathodc arc 20 kA/cm2 and 100 cm2,rcspcctivcly.The optimal dcsign parameters of the electron gun are obtained.The PIC simulation results of BWO show that the output power of BWO can reach 290 MW with a frequency of 10.5 GHz,and the beam-wave interaction efficiency is 29%.