| S波段多注相对论速调管放大器长时间运行研究北大核心CSCD |
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| 引用本文： | 黄华,李士锋,孙利民,谭杰,王朋,刘振帮,向启帆.S波段多注相对论速调管放大器长时间运行研究北大核心CSCD[J].强激光与粒子束,2022,34(11):113001-1-113001-7. |
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| 作者姓名： | 黄华 李士锋 孙利民 谭杰 王朋 刘振帮 向启帆 |
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| 作者单位： | 中国工程物理研究院 应用电子学研究所，高功率微波技术重点实验室，四川 绵阳 621900 |
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| 基金项目： | 国家高技术发展计划项目 |
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| 摘 要： | 为了实现高功率微波源低磁场及长时间稳定运行,开展了S波段GW级多注相对论速调管放大器(RKA)的理论模拟设计与实验研究。首先,采用一维大信号非线性理论软件优化设计了S波段4腔多注RKA,找到了器件工作的最佳参数:采用电压550 kV、束流4.7 kA的14注RKA,获得功率1.1 GW、效率43%的输出微波。随后,采用粒子模拟软件对理论设计的束波互作用参数进行了验证,获得了输出功率992 MW,器件效率为37%。最后,根据模拟参数开展了器件重频长时间运行实验研究。采用紧凑同轴Marx功率源驱动S波段四腔多注RKA,在电压530 kV、束流5.4 kA、重频20 Hz、运行时间1 s、引导磁场强度0.39 T、注入微波功率1.7 kW的条件下,获得了功率934 MW、脉宽69 ns的输出微波,束波转换效率33%。在器件重频20 Hz、运行时间10 min条件下,坚实了平均功率889 MW、平均脉宽42 ns的输出微波。该研究结果为S波段RKA的低磁场和长时间运行打下了的技术基础。
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| 关 键 词： | 高功率微波 相对论速调管放大器 强流相对论电子束 长时间运行 多注电子束 |
| 收稿时间： | 2022-06-12 |
Longtime operation of S-band multi-beam relativistic klystron amplifier |
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| Affiliation: | Science and Technology on High Power Microwave Laboratory, Institute of Applied Electronics, CAEP, Mianyang, 621900, China |
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| Abstract: | To realize a high power microwave source of longtime operation with a low guiding magnetic field, an S-band, GW level multi-beam relativistic klystron amplifier (RKA) has been investigated by means of theoretical modeling, numerical simulation and experiment. Firstly, a four-cavity multi-beam RKA was optimized with a one-dimension large signal code, and optimal working parameters are obtained. Under the conditions of 530 kV voltage, 4.7 kA current, and 14 beams, a 1.1 GW averaged microwave power with efficiency 43% was generated with the code. Subsequently, the beam-wave interaction parameters obtained from the code were verified with a PIC code, and a 992 MW output microwave power with efficiency 37% was obtained. At last, a long time operation experiment was conducted. In such an experiment, a 934 MW averaged microwave power with 69 ns pulse width and 33% efficiency was generated under the conditions of 530 kV voltage, 5.4 kA current, 20 Hz repetition frequency for 1 s, 0.39 T guiding magnetic field and 1.7 kW input microwave power. In addition, for the experiment of 20 Hz repetition frequency and 10 min operating time, a 889 MW averaged microwave power was obtained with 42 ns averaged pulse width. The investigation results make a strong foundation for the S-band RKAs of low guiding magnetic field and longtime operation. |
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