Improvements and New Evaluation of NIM4 Cesium Fountain Clock and Construction of NIM5 Clock in 2006

被引：0
|
作者：
Li Tianchu
机构：
来源：
Engineering Sciences | 2007年 / 02期
关键词：
metrology; time and frequency standards; cesium fountain clock;
D O I：
暂无
中图分类号：
TM935.11 [频率标准];
学科分类号：
080802 ;
摘要：
The NIM4 cesium fountain clock has been operating stably and sub-continually since Aug. 2003. In this paper we present improvements on NIM4 in 2005-2006 and the most recent evaluation for its frequency shifts with an uncertainty of 5E-15. A 220 days comparison between NIM4 and GPS showed an agreement of 2E-14. Finally the construction of a NIM5 transportable cesium fountain clock is briefly reported.
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页码：124 / 128
页数：5
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