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X波段同轴多注相对论速调管放大器的初步实验研究
Experimental study on an 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和输出功率，结合三重轴相对论速调管和多注速调管的特点，设计了工作在X波段的同轴强流多注相对论速调管放大器，对强流多注电子束在多注器件结构中的传输、电子束经过输入腔和中间腔后的基波调制以及经过输出腔的微波提取过程进行了实验研究，得到了初步的实验结果．在输入微波功率30kW,频率9．375GHz，电子束电压670kV,束流5．3kA，轴向引导磁感应强度0．8T的条件下，得到了最大输出微波功率为420Mw，效率为12％，增益为4ldB，输出微波频率与输入微波一致．实验证实了采用同轴强流多注相对论速调管放大器实现X波段高功率微波放大的可行性，为后续更高功率研究打下了基础．Abstract: The advantages of the tri-axial relativistic klystron amplifier and the multi-beam klystron amplifier are analyzed, and then an X-band coaxial multi-beam relativistic klystron amplifier is designed in order to increase the output microwave power and frequency. Based on the results from partial-in-cell simulation, the experiment is performed on the Sinus accelerator. In experiment, the transmis- sion and bunching of electron beam are analyzed, and then the amplifier is driven by a beam of 5.3 kA at 670 kV, and the maximum output power is 420 MW when input power is 30 kW, and frequency is 9.375 GHz. The experiment proves that a ten kW-level input power can drive the X-band coaxial multi-beam relativistic klystron amplifier to generate more than one hundred MW-level output power.
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