A New Microwave Synthesis Chain for the Primary Frequency Standard NIST-F1

T.P. Heavner, S.R. Jefferts, E.A. Donley, T.E. Parker, F. Levi

Abstract:	We present the design and measurements of the microwave synthesis chain presently used in NIST-F1, the laser-cooled cesium fountain primary frequency standard in operation at NIST, Boulder, CO. The chain has been used in two accuracy evaluations of NIST-F1 (January 2005 and July 2005), each of which had a combined (Type A and Type B) fractional frequency uncertainty of ~ 0.5 × 10-15. Additionally, this synthesis chain was in use during a recent calibration of the 199Hg+ optical clock transition against Cs, which had a fractional uncertainty of 9.1 × 10-16 .
Published in:	Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting August 29 - 31, 2005 Vancouver, Canada
Pages:	308 - 311
Cite this article:	Heavner, T.P., Jefferts, S.R., Donley, E.A., Parker, T.E., Levi, F., "A New Microwave Synthesis Chain for the Primary Frequency Standard NIST-F1," Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting, Vancouver, Canada, August 2005, pp. 308-311.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In