Accuracy Evaluation of NIM5 Cesium Fountain Clock
LIU Nian-Feng** , FANG Fang, CHEN Wei-Liang, LIN Ping-Wei, WANG Ping, LIU Kun, SUO Rui, LI Tian-Chu
National Institute of Metrology, Beijing 100013
Abstract ：The NIM5 fountain clock is the second fountain clock built at NIM (National Institute of Metrology, China), and has been operating stably and sub-continually since 2008. The fountain operates with a simple one-stage optical molasses to collect cold atoms, which reduces the collisional frequency shift dramatically. The fractional frequency uncertainty is estimated to be 2×10?15 . The typical frequency instability of 2.5×10?14 is obtained at 10 s. Comparisons with other fountain frequency standards worldwide demonstrate agreement within the stated uncertainties.
收稿日期: 2012-08-01
出版日期: 2013-03-04
:
06.30.Ft
(Time and frequency)
43.58.Hp
(Tuning forks, frequency standards; frequency measuring and recording instruments; time standards and chronographs)
95.55.Sh
(Auxiliary and recording instruments; clocks and frequency standards)
引用本文:
. [J]. Chin. Phys. Lett., 2013, 30(1): 10601-010601.
链接本文:
https://cpl.iphy.ac.cn/CN/10.1088/0256-307X/30/1/010601
或
https://cpl.iphy.ac.cn/CN/Y2013/V30/I1/10601
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2013, Vol. 30 
