Initial Tests of a Rubidium Space Cold Atom Clock

We report the initial test results of a rubidium （87Rb） space cold atom clock （SCAC）. The space-qualified ST Rb SCAC is composed of the physical package, the optical bench, the microwave synthesizer and the control electronics. After the system is integrated, about 108 ST Rb cold atoms are captured...

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Bibliographic Details
Published in:Chinese physics letters 2016-06, Vol.33 (6), p.17-20
Main Author: 李琳 屈求智 汪斌 李唐 赵剑波 吉经纬 任伟 赵鑫 叶美凤 姚媛媛 吕德胜 刘亮
Format: Article
Language:English
Subjects:
Sigma
冷原子钟
原子空间
微波频率合成器
微重力环境
测试
铷
频率稳定性
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Summary:We report the initial test results of a rubidium （87Rb） space cold atom clock （SCAC）. The space-qualified ST Rb SCAC is composed of the physical package, the optical bench, the microwave synthesizer and the control electronics. After the system is integrated, about 108 ST Rb cold atoms are captured by magneto-optical trap. The linewidth of the Ramsey fringe is about lO Hz for the free evolution time of 50ms on the ground, and the signM-to-noise ratio is measured to be larger than 300. We demonstrate a good medium-term fractional frequency stability of 1.5×10^-14@1000s in the closed-loop operation on the ground. The main effects of the noise on the stability are a/so presented, and the optimized operating parameter is analyzed for the operation of SCAC in the microgravity environment.
ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/33/6/063201