| Improvements and New Evaluation of NIM4 Caesium Fountain Clock at NIM in 2005-2006 |
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| 引用本文： | 李天初 李明寿 林平卫 王平 陈伟亮 刘年丰 林戈戈. Improvements and New Evaluation of NIM4 Caesium Fountain Clock at NIM in 2005-2006[J]. 中国物理快报, 2007, 24(5): 1177-1179 |
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| 作者姓名： | 李天初 李明寿 林平卫 王平 陈伟亮 刘年丰 林戈戈 |
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| 作者单位： | National Institute of Metrology （NIM）, Beijing 100013 |
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| 摘 要： | The NIM4 caesium fountain clock has been operating stably and sub-continually since August 2003. We present our improvements on NIM4 in 2005-06 and the most recent evaluation for its frequency shifts with an uncertainty of 5 × 10^-15. A 203-day comparison between NIM4 and GPS time shows an agreement of 2 × 10^-14. Finally the construction of the NIM5 transportable caesium fountain clock is briefly reported.
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| 关 键 词： | NIM4 铯 喷泉时钟 评估 |
| 收稿时间： | 2007-01-15 |
| 修稿时间： | 2007-01-15 |
Improvements and New Evaluation of NIM4 Caesium Fountain Clock at NIM in 2005--2006 |
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| LI Tian-Chu,LI Ming-Shou,LIN Ping-Wei,WANG Ping,CHEN Wei-Liang,LIU Nian-Feng,LIN Yi-Ge. Improvements and New Evaluation of NIM4 Caesium Fountain Clock at NIM in 2005--2006[J]. Chinese Physics Letters, 2007, 24(5): 1177-1179 |
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| Authors: | LI Tian-Chu LI Ming-Shou LIN Ping-Wei WANG Ping CHEN Wei-Liang LIU Nian-Feng LIN Yi-Ge |
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| Affiliation: | National Institute of Metrology (NIM |
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| Abstract: | The NIM4 caesium fountain clock has been operating stably and sub-continually since August 2003. We present our improvements on NIM4 in 2005--06 and the most recent evaluation for its frequency shifts with an uncertainty of 5×10-15. A 203-day comparison between NIM4 and GPS time shows an agreement of 2×10-14. Finally the construction of the NIM5 transportable caesium fountain clock is briefly reported. |
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| Keywords: | 06.30.Ft 43.58.Hp |
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