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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30 kW,频率9.375 GHz,电子束电压670kV,束流5.3 kA,轴向引导磁感应强度0.8 T的条件下,得到了最大输出微波功率为420 MW,效率为12%,增益为41 dB,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.
In order to improve the operating frequency and output power of the relativistic klystron amplifier, the coaxial strong current multiple-injection relativistic klystron amplifier operating in the X-band is designed according to the characteristics of the triaxial relativistic klystron and the multi-injection klystron. The experimental results of the transmission of strong current multi-shot electron beam in multi-device structure, the fundamental modulation of electron beam after input cavity and middle cavity, and the microwave extraction process through the output cavity have been obtained. Under the conditions of microwave power of 30 kW, frequency of 9.375 GHz, beam voltage of 670 kV, beam current of 5.3 kA and magnetic induction of axial guidance of 0.8 T, the maximum output microwave power is 420 MW, the efficiency is 12%, the gain is 41 dB, The output microwave frequency is consistent with that of the input microwave.The experiment proves the feasibility of using X-band high power microwave amplification with coaxial strong current multi-injection relativistic klystron amplifier, laying the foundation for the subsequent higher power research.