摘要
通过二维和三维粒子模拟研究了高增益相对论速调管放大器中高次模式的激励机理,两者结果的一致性排除了高次非对称模式激励的影响。由此建立了高次模式起振的理论模型,给出了高次模式的起振电流。并通过在器件内加入微波衰减材料来抑制高次模式自激振荡,模拟获得了1.95GW的微波输出,增益62.8dB。
The mechanism of high order mode excitation in high gain relativistic klystron amplifier is explored in the 2Dand 3DPIC simulations.The impact of the asymmetric mode excitation is excluded as the 2Dsimulation result is in accord with the 3D simulation.The formula for startup current of high order mode excitation is developed based on theoretical model.And RF lossy material is introduced to suppress high order mode self-oscillation.Mode control is realized in the simulation with the RF output power of 1.95GW,and the corresponding gain is 62.8dB.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2014年第3期147-151,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(61271109)
关键词
相对论速调管放大器
高增益
高次模式
自激振荡
relativistic klystron amplifier
high gain
high order mode
self-oscillation
