低温超导微波频率源的实验研究

A study of cryogenic superconducting microwave frequency source

针对低温超导微波频率源的研制,通过理论分析和仿真设计,得到了其优化设计方案,主要涉及高Q值超导腔、高稳定低温环境及锁相稳频环路等组件/技术的研究,并完成了系统闭环实验测试。实验表明,超导腔的Q值最高达到1.9×109,低温环境温度达到1.6 K,温度稳定度优于0.000 4 K,微波源的频率稳定度最高可达到4.6×10-15/1s。

A optimized design of cryogenic superconducting microwave frequency source is achieved based on theory analysis and computer simulation. The design involves superconducting cavity with high quality factor, highly stable and cryogenic environment, phase-looked loop and so on. The closed-loop tests were completed and the experiments show that the quality factor of cavity reaches 1.9×109, the environment temperature is 1.6 K, the temperature stability is better than 0.000 4 K and the frequency stability for 1 s reaches 4.6×10-15.