武汉光源高频系统中P波段160 kW连续波环行器的研制  

Developing a 160 kW continuous wave circulator for the P-band high-frequency system of the Wuhan light source

作　　者：肖诚成 张强 王程 张俊强 方文程 徐一茗 XIAO Chengcheng;ZHANG Qiang;WANG Cheng;ZHANG Junqiang;FANG Wencheng;XU Yiming(Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201204,China;Beijing 798microwave,Beijing 101204,China)

机构地区：[1]中国科学院上海高等研究院,上海201204 [2]北京飞行泰达微波器件有限公司,北京101204

出　　处：《核技术》2025年第1期42-49,共8页Nuclear Techniques

基　　金：国家自然科学基金(No.12105345,No.11975298);"一带一路"国际科学组织联盟(No.ANSO-CR-KP-2020-16)资助。

摘　　要：在同步辐射高频腔设备工作过程中,反射功率的突然增大会导致环行器腔体温度升高,进而使环行器中旋磁铁氧体的参数特性产生变化,最终导致反射功率不能很好地被引导至吸收负载处。为了防止负载反射功率过高对功率源造成不可逆转的损伤,需要将高功率环行器的反射功率引导至吸收负载上,从而对功率源进行保护。因此,在环行器上设计增加温度补偿功能模块,对环行器的张量磁导特性进行补偿。介绍了国内首台带有温度补偿控制功能的P波段160 kW连续波环行器的研制。经过测试,环行器在中心频率499.654 MHz,带宽±5 MHz范围内的传输损耗低于0.1 dB,中心频率处可达到0.06 dB以下。输入口反射在输出端口全短路的最差情况下,仍然优于-29 dB。在使用恒温水箱模拟实际运行过程中的水温变化的过程中,温度补偿控制模块能让环行器性能保持最佳状态,验证了温度补偿模块功能的可靠性。[Background]Solid-state amplifiers of synchrotron radiation high-frequency cavity equipment may sustain unrecoverable damage due to the excessive reflected power resulting from load detuning,a high-power circulator is used to guide the reflected power to the absorbing load and thus protect the power source.In this case,if the reflected power suddenly increases during device operation,the temperature of the circulator cavity will be risen and the parameter characteristics of the gyromagnetic ferrite will be changed in the circulator,and eventually lead to poor absorption of the reflected power by the load.[Purpose]This study aims to design and develop a circulator with a temperature compensation control unit,capable of functioning at 499.654 MHz with a 160 kW continuous wave radiofrequency power.[Methods]Firstly,the circulator was simulated and optimized using the HFSS software.Thermal simulation shows that the temperature rise of ferrite sheets under 160 kW continuous wave is less than 13°C.Then,impedance matching was performed on the circulator using tuners arranged at each of the three ports,and feedforward control was used to compensate for the temperature changes.Finally,a constant temperature water tank was employed to simulate the change in water temperature during actual operation,the reliability of temperature compensation function of the control unit was verified by the performance of the circulator restoring to the best condition.[Results]The insertion loss is better than−29 dB under the worst case of a complete short circuit at the output port,the circulator loss is less than 0.1 dB in the bandwidth of±5 MHz,and this loss reaches 0.06 dB at the center frequency.[Conclusions]The S parameters of the circulator meet the design requirements,and the reliability of the temperature control compensation unit of circulator is verified by constant temperature water tank simulation test in this study.

关 键 词：铁氧体 环行器 温度补偿 P波段 高功率 

分 类 号：TL503.2[核科学技术—核技术及应用]