C场电流对铷原子喷泉钟性能影响的分析
Analysis on the influence of C-field current on the performance of rubidium fountain atomic clock
朱子毅 1雷鹏越 1张辉 2阮军 2张首刚3
作者信息
- 1. 中国科学院国家授时中心 西安 710600;中国科学院大学 北京 100049
- 2. 中国科学院国家授时中心 西安 710600;中国科学院时间频率基准重点实验室 西安 710600
- 3. 中国科学院国家授时中心 西安 710600;中国科学院大学 北京 100049;中国科学院时间频率基准重点实验室 西安 710600
- 折叠
摘要
铷原子喷泉钟的C场电流稳定性会影响钟的二阶塞曼频移,传统优化C场线圈物理系统的方法存在系统复杂且难以满足铷钟小型化要求的缺点.本文从铷原子喷泉钟的电路系统入手,提出了采用芯片电流源优化C场电路的方法.首先,分析研究了芯片电流源输出波动对铷原子喷泉钟二阶塞曼频移项的影响,得到了铷原子喷泉钟二阶塞曼频移与C场芯片电流源输出电流之间的变化关系;其次,对优化前后铷原子喷泉钟C场电流进行了相关测量实验.实验表明,使用VC12MA电流源产生C场时,其输出电流值Allan方差为2.24×10-9,对铷原子喷泉钟二阶塞曼频移的相对扰动为1.78×10-17,铷原子喷泉钟二阶塞曼频移的频率稳定度从原来的10-16 量级提升至优化后的10-17 量级,本文方法在铷原子喷泉钟性能提升及小型化中有很大的应用价值.
Abstract
The C-field current stability of rubidium atomic fountain clock can affect the second-order Zeeman frequency shift of the clock.Traditional methods to optimize the physical system of the C-field are complicated and difficult to meet the miniaturization requirements.Starting from the circuit system of rubidium atomic fountain clock,this paper puts forward the method of optimizing C-field circuit by using chip current source.Firstly,the influence of the chip current source output fluctuation on the second order Zeeman frequency shift of the rubidium atomic fountain clock is analyzed and the relationship between the second order Zeeman frequency shift of the rubidium atomic fountain clock and the output current of the C-field chip current source is obtained;secondly,the measurement experiment of VC12MA current source is carried out.The experiment shows that when the C field is generated by VC12MA current source,the Allan variance of the output current value is 2.24×10-9,and the relative disturbance to the second-order Zeeman frequency shift of the rubidium atomic fountain clock is 1.78×10-17.The frequency stability of the second-order Zeeman shift of the rubidium atomic fountain clock is improved from the original 10-16 order to the optimized 10-17 order.The method presented in this paper has great application value in the performance improvement and miniaturization of the rubidium atomic fountain clock.
关键词
铷原子喷泉钟/C场/二阶塞曼频移/频率稳定度Key words
rubidium atomic fountain clock/C field/second order Zeeman shift/frequency stability引用本文复制引用
出版年
2024
NETL
NSTL
万方数据