Accuracy Evaluation of NIM5 Cesium Fountain Clock

被引:6
|
作者
Liu Nian-Feng [1 ]
Fang Fang [1 ]
Chen Wei-Liang [1 ]
Lin Ping-Wei [1 ]
Wang Ping [1 ]
Liu Kun [1 ]
Suo Rui [1 ]
Li Tian-Chu [1 ]
机构
[1] Natl Inst Metrol, Beijing 100013, Peoples R China
基金
中国国家自然科学基金;
关键词
PRIMARY FREQUENCY STANDARD; SHIFT;
D O I
10.1088/0256-307X/30/1/010601
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 x 10(-15). The typical frequency instability of 2.5 x 10(-14) is obtained at 10s. Comparisons with other fountain frequency standards worldwide demonstrate agreement within the stated uncertainties.
引用
收藏
页数:4
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