摘要
设计了一种Ｘ波段耦合阻抗单阶跃变型相对论返波管结构，运用２．５维全电磁粒子程序模拟分析了器件中注波互作用过程，仿真了器件效率与电子注参数的依赖关系，得到了器件在５００ｋＶ、５．５ｋＡ电子注驱动下，能辐射出峰值功率８００ＭＷ、频率为（９．１６±０．０３）ＧＨｚ的微波，工作模式为ＴＭ_０１，效率为３０％。在截止波导与慢波结构之间设置一段长度合适的光滑漂移段，通过改善正向波基波对电子注的初始调制效果，优化效率可达到３８％。
A high-efficient relativistic backward wave oscillator with a single-step change in thecouple impedance has been designed and analyzed in the paper. An electromagnetic particle-in-cell code is being used to investigate the nonlinear beam-wave interaction in the device and other design optimization issues. The simulation results show that the device can generate 800MW peak power microwave at (9. 16+0.03)GHz in the TM_01 mode driven by 500kV, 5. 5kA electron beams. The peak power efficiency is about30%. The device optimum efficiency can be more up to 38% when a section of smooth drift tube lying between cut-off waveguide and slow wave structure is in the optimum condition.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
1999年第6期737-741,共5页
High Power Laser and Particle Beams
基金
国家863计划激光技术领域资助
关键词
高功率微波
粒子模拟
变阻抗相对化返波管
high power microwave
relativistic backward wave oscillator
particle-in-cell RBWO with variable couple impedane
