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|Author(s):||Thomas E. Parker; Steven R. Jefferts; Thomas P. Heavner;|
|Title:||Medium-Term Frequency Stability of Hydrogen Masers as Measured by a Cesium Fountain|
|Published:||June 02, 2010|
|Abstract:||Abstract Hydrogen masers are used extensively in time scale ensembles, but the frequency drift must be accurately known. NIST-F1, the cesium fountain primary frequency standard at the National Institute of Standards and Technology, now operates nearly every month and has provided an unprecedented opportunity to characterize the medium-term frequency stability (tau = 30 to 90 days) of six hydrogen masers. An unexpected observation was a moderate level of correlation in the frequency fluctuations of all the masers.|
|Proceedings:||Proc. 2010 IEEE Intl. Freq. Cont. Symp.|
|Pages:||pp. 318 - 323|
|Location:||Newport Beach, CA|
|Dates:||June 1-4, 2010|
|Keywords:||atomic frequency standards,cesium fountain,hydrogen maser|
|Research Areas:||Physics, Time and Frequency|
|PDF version:||Click here to retrieve PDF version of paper (469KB)|