| 强流脉冲驱动的X波段多注相对论速调管相位特性 |
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| 引用本文： | 袁欢,刘振帮,黄华,孟凡宝,陈昌华.强流脉冲驱动的X波段多注相对论速调管相位特性[J].强激光与粒子束,2017,29(9):093005. |
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| 作者姓名： | 袁欢 刘振帮 黄华 孟凡宝 陈昌华 |
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| 作者单位： | 1.中国工程物理研究院 研究生院, 北京 1 00088; |
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| 摘 要： | 相位特性是目前制约多注相对论速调管放大器进一步拓展应用的关键参数之一，为了有效提高器件输出微波相位的稳定性，利用一维非线性理论对X波段强流多注速调管放大器开展了理论研究，得到由强流脉冲特性引起的腔体杂频以及电子束运动速度变化率是造成输出微波相位波动的部分主要原因，同时基于18注实心电子束构成的X波段多注相对论速调管放大器开展了强流脉冲特性对输出微波频率和相位影响的数值计算，最后利用粒子模拟手段对理论结果进行验证。理论和模拟结果一致表明:强流脉冲的前沿和波动都将导致器件内实际工作频率的偏移，并引起相位波动；在脉冲前沿段，脉冲前沿长度越短，器件内实际工作频率偏移越大，相位波动幅度越大；在脉冲平顶段，脉冲波动导致的频率偏移与电压变化率相关，与电压的幅值无关，而脉冲电压波动导致的输出微波相位波动由电压变化率及其变化幅度两者共同决定。
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| 关 键 词： | 相对论速调管放大器 多注速调管 相位特性 强流脉冲电子束 高功率微波 X波段 |
| 收稿时间： | 2017-04-21 |
Phase characteristics of X-band multiple beams relativistic klystron driven by intense pulse electron beams |
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| Affiliation: | 1.Graduate School of China Academy of Engineering Physics,Beijing 100088,China;2.Science and Technology on High Power Microwave Laboratory,Institute of Applied Electronics,CAEP,Mianyang 621900,China;3.Science and Technology on High Power Microwave Laboratory,Northwest Institute of Nuclear Technology,Xi’an 710024,China |
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| Abstract: | The phase characteristic of multiple beams relativistic klystron amplifier is an important parameter, which limits the amplifiers applications. In order to reduce the phase jitter and improve the stability of the device, the phase characteristics of intense relativistic klystron amplifier is studied by one dimension non-linear theory. The theoretical results indicate that multiple frequency in the cavity and velocity gradient of electron beams caused by the characteristics of intense pulse voltage are the main reasons leading to phase fluctuation. Then numerical analysis of phase jitter caused by intense pulse power are developed based on an X-band multiple beam relativistic klystron amplifier with 18 electron beams. The theoretical and simulation results show together that front edge and fluctuation of pulse voltage both can lead to frequency shift and phase jitter. And the shift of operation frequency and fluctuation of phase will be greater while the rise time of pulse voltage is shorter. Besides, the shift of operation frequency is only determined by the fluctuation gradient of pulse voltage and the fluctuation of phase is determined by the fluctuation amplifier and gradient of pulse voltage. |
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