超导腔数字自激垂直测试系统  

Digital self-excited vertical test system of superconducting cavity

作　　者：杨际森 潘卫民[1,2,3,4] 王洪磊 刘佳冀 王牧源 周全 贺斐思 沙鹏[1,3,4] 林海英 王群要[1,3,4] 王光伟[1,3,4] 米正辉[1,3,4] Yang Jisen;Pan Weimin;Wang Honglei;Liu Jiaji;Wang Muyuan;Zhou Quan;He Feisi;Sha Peng;Lin Haiying;Wang Qunyao;Wang Guangwei;Mi Zhenghui(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Particle Acceleration Physics and Technology,Chinese Academy of Sciences,Beijing 100049,China;Center for Superconducting RF and Cryogenics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院高能物理研究所,北京100049 [2]中国科学院大学,北京100049 [3]中国科学院粒子加速器物理与技术重点实验室,北京100049 [4]中国科学院高能物理研究所射频超导与低温研究中心,北京100049

出　　处：《强激光与粒子束》2020年第4期41-46,共6页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11805216)

摘　　要：基于数字自激算法设计并实现的超导腔垂直测试系统提高了超导腔的垂直测试效率,为先进光源技术研发与测试平台(PAPS)的超导腔批量化生产提供了重要保障;垂直测试系统的射频前端和时钟分配系统采用了二次上下变频方案,可以在一定范围内灵活设置测试系统自激环路的工作频率,增大了该测试系统的工作带宽。利用此系统完成了1.3 GHz 9-cell超导腔的通带频率测试,结果表明,该测试系统能有效避免不同模式之间的串扰,具备较强的频率分辨能力(<800 kHz),保证多单元超导腔性能验证的进行。Vertical test is an important method for characterizing the performance of superconducting cavities.We designed an superconducting cavity vertical test system based on digital self-excited algorithm and the technology of low-level radio frequency, which could improve the vertical test efficiency of superconducting cavities. The RF front-end and clock distribution system of the vertical test system adopts the second up-and-down conversion scheme.To some extent, the working frequency of the digital self-excited loop of the vertical test system can be set flexibly,and the working bandwidth of the test system is increased. The test results of the pass-band frequency of the 1.3 GHz9-cell superconducting cavity show that the vertical test system has strong frequency resolution(<800 kHz) to ensure the smooth progress of the multi-cell superconducting cavity pass-band test.

关 键 词：超导腔 垂直测试 数字自激 二次上下变频 数字低电平 

分 类 号：TL503.2[核科学技术—核技术及应用]