Improvements and New Evaluation of NIM4 Caesium Fountain Clock at NIM in 2005--2006
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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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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]. Chin. Phys. Lett., 2007, 24(5): 1177-1179.
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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]. Chin. Phys. Lett., 2007, 24(5): 1177-1179.
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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]. Chin. Phys. Lett., 2007, 24(5): 1177-1179.
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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]. Chin. Phys. Lett., 2007, 24(5): 1177-1179.
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