回旋行波放大器输出端反射对其稳定性的影响  

Influence of reflections of output port on stability of gyrotron traveling wave amplifier

作　　者：孙海燕[1] 姜岩峰[1] 李尹[2] 罗积润[3] 

机构地区：[1]北方工业大学信息工程学院,北京100144 [2]中国电子科技集团公司第29研究所,成都610036 [3]中国科学院电子学研究所,北京100190

出　　处：《强激光与粒子束》2011年第3期755-760,共6页High Power Laser and Particle Beams

摘　　要：基于回旋行波放大器的线性理论和反射边界条件,建立了渐变输出端存在反射时回旋行波放大器模型,分析了TE01圆电模基波回旋行波放大器输出端反射对其增益、返波起振长度、返波起振电流和返波起振频率的影响。结果表明,随着反射增强,线性增益降低,返波起振长度和起振电流减小,返波起振频率的变化较小;反射增强将在一定程度内影响放大器的稳定性。Based on the linear theory of gyrotron traveling wave amplifier（gyro-TWA） and the boundary condition,the model of the gyro-TWA with reflections at the output port is established.The influence of the reflections on the wave gain rate,the back wave starting length and the back wave starting current for a Ka band TE01 gyro-TWA at fundamental mode is analyzed.The simulating results show that,for the TE01 mode gyro-TWA,the linear growth rate decreases,the starting length and current of the gyro-backward wave oscillation decrease but the starting frequency varies little with the increase of the tapering angle,and the increased reflection may lower the amplifier＇s stability to some extent.

关 键 词：回旋行波放大器 回旋返波振荡 反射系数 注-波互作用 起振条件 

分 类 号：TN128[电子电信—物理电子学]