带有反射腔的相对论返波管的数值模拟
Numeric Study of Relativistic Backward wave oscillator with Resonant reflector
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摘要: 阐述了带有反射腔的相对论返波管的数值模拟研究。利用线性理论[1]设计了返波管的慢波结构，应用SUPERFISH软件设计了谐振反射器。用KARAT软件对谐振反射腔返波管进行了宏观粒子模拟，得到了优化的返波管结构参数，并研究了外加磁场对输出效率的影响。模拟结果表明：谐振反射腔不仅起到截止颈的作用，还有预调制的作用；在低外加磁场条件下，该返波管也能输出较高功率的微波。显示了其在重复频率工作方面的重要意义。Abstract: Numeric Study of relativistic BWO with resonant reflector is present. SWS and a resonant reflector of the BWO are designed by use of linear theory of RBWO and code SUPERFISH respectively. Particle simulation of the device has been done in electromagnetic code KARAT ，in which structure of the BWO has been optimized and the dependence of microwave efficiency on applied magnetic field has been investigated. Simulation results show that a resonant reflector is able not only to reflect wave but also to pre-modulate electron beam and the BWO will generate relatively high power wave at low applied magnetic field.
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