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

来源：

CHINESE PHYSICS LETTERS | 2013年 / 30卷 / 01期

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

页数：4

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