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X波段长脉冲同轴多注相对论速调管放大器的分析与设计
Analysis and design of X-band coaxial multi-beam relativistic klystron amplifier
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摘要: 为了提高相对论速调管放大器的工作频率、输出功率以及转换效率，结合三重轴相对论速调管和多注速调管的特点，采用三维电磁粒子模拟软件分析与设计了工作在x波段的长脉冲同轴多注相对论速调管放大器，通过优化设计有效地抑制了x波段长脉冲相对论速调管放大器的自激振荡，避免了脉冲缩短现象的产生，使x波段相对论速调管放大器在长脉冲状态下能够稳定工作，在注入微波功率为70kW、束压为600kV、束流为5kA、轴向引导磁感应强度为0．8T的条件下，输出微波功率达到了1．23GW效率为41％，增益为42dB．Abstract: The space charge limiting current in cylinder drifting tube and coaxial drifting tube and the energy that could be obtained and also the restrict magnetic field are analyzed, and the results show that it is propitious to change the energy of electron beam into microwave power in the coaxial conduit. The advantages of the tri-axial relativistic klystron amplifier and the multi-beam ldystron amplifier are analyzed, then an X-band coaxial multi-beam relativistic klystron amplifier is designed by using a three-dimensional particle simulation software, and the transmition and the bunching of electron beam are analyzed. A 1.23 GW averaged microwave power over the oscillator period is generated by simulation with 600 kV electron beam voltage, 5 kA current and 0.8 T leading magnetic field density, the frequency is 9.37 GHz and the efficiency is 41%.
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