铷原子频标物理部分改进  

Improvement of Physics Package for Rubidium Atomic Frequency Standard

作　　者：陈溶波[1] 崔敬忠[1] 梁耀廷 张金海[1] 涂建辉[1] 杨炜[1] 

机构地区：[1]中国空间技术研究院兰州空间技术物理研究所,甘肃兰州730000

出　　处：《原子能科学技术》2016年第2期380-384,共5页Atomic Energy Science and Technology

基　　金："十二五"新建可靠性增长项目资助(WB0547820)

摘　　要：本文对星载铷原子频标物理部分进行技术改进。改善磁控管微波腔的结构,使信噪比得到了提高;优化了物理部分光路系统,使光电探测信号强度提高了25%。此外,通过Ansoft HFSS仿真软件建立了微波腔的模型,对腔内场型分布和谐振频率进行了仿真,数字仿真和性能测试显示这种微波腔的谐振模式为TE011模式,且拥有较大的质量因子。最后,对改进后的铷原子频标系统进行了初步测试,发现短期稳定度达到了6.0×10^(-13)τ^(-1/2)(τ为取样时间)。研究结果表明,改进后的物理部分满足铷原子频标的研制需求,适合应用于高性能的星载铷原子频标。Some technological improvements were carried out in physics package for rubidium atomic frequency standard. The structure optimization of magnetron micro- wave cavity improved the signal to noise ratio. The optical path was optimized, and the signal intensity on the photo detector increased by 25%. Besides, a model of magnetron microwave cavity was established using Ansoft HFSS software. The field distribution and resonance frequency were simulated. The numerical simulation and performance test indicate that the modified magnetron cavity operates at TE0n mode and has a high quali- ty factor. A preliminary test on the modified rubidium atomic frequency standard was carried out, and the high performance of physics package was validated by achieved an excellent short-term stability as low as 6.0×10-13τ^-1/2（τ is sampling time）. The achieved experimental results show that the modified magnetron microwave cavity can meet the requirement for rubidium atomic frequency standard, and is suitable for appli- cation in high performance space rubidium atomic frequency standard.

关 键 词：铷原子频标 物理部分 磁控管微波腔 谐振频率 TE011 

分 类 号：TM935.11[电气工程—电力电子与电力传动]