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。
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 onedimension 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.
作者
黄华
李士锋
孙利民
谭杰
王朋
刘振帮
向启帆
Huang Hua;Li Shifeng;Sun Limin;Tan Jie;Wang Peng;Liu Zhenbang;Xiang Qifan(Science and Technology on High Power Microwave Laboratory,Institute of Applied Electronics,CAEP,Mianyang,621900,China)
出处
《强激光与粒子束》
CAS
CSCD
北大核心
2022年第11期53-59,共7页
High Power Laser and Particle Beams
基金
国家高技术发展计划项目。
