TE21模回旋返波振荡的起振分析
doi: 10.3724/SP.J.1146.2008.00233
Analysis of the Gyro-Back Wave Oscillations of the TE21 Mode
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摘要: 该文基于回旋行波放大器的线性理论，对TE21模回旋返波振荡起振长度和起振频率随导引中心半径、电压、速度比、注电流及工作磁场等参数的变化进行了详细的数值模拟，并给出了相应的物理解释，分析了TE21模基波和二次谐波回旋返波振荡特点，研究了分布损耗对回旋返波振荡的抑制效果。所得结果对回旋行波放大器和回旋返波振荡器的设计有参考意义。Abstract: Based on the linear theory of gyro-TWA, this paper is focused on the numerical simulations for the relations of the starting length and starting frequency with beam radius, voltage, velocity ratio, beam current and magnetic field for a gyro-BWO operating in the TE21 mode at fundamental or second harmonic and the corresponding physical mechanisms is explained. And the effect of distributed wall losses on the suppression of the TE21 mode gyro-BWO is discussed. The results in this paper are helpful for the design of gyro-TWA and gyro-BWOs.
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