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

Published

Author(s)

Thomas P. Heavner, Steven R. Jefferts, Elizabeth A. Donley, F Levi, Thomas E. Parker

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. This system has been used in two accuracy evaluations of NIST-F1 (January 2005 and July 2005) which each 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.
Proceedings Title
Proc. Joint Mtg. IEEE Intl. Freq. Cont. Symp. and PTTI Mtg.

Keywords

CES, GEN, SYN, TIME

Citation

Heavner, T. , Jefferts, S. , Donley, E. , Levi, F. and Parker, T. (2005), A New Microwave Synthesis Chain for the Primary Frequency Standard NIST-F1, Proc. Joint Mtg. IEEE Intl. Freq. Cont. Symp. and PTTI Mtg., [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50220 (Accessed February 21, 2024)
Created August 29, 2005, Updated February 17, 2017