Title :
Preliminary accuracy evaluation of a cesium fountain primary frequency standard at NIST
Author :
Jefferts, S.R. ; Meekhof, D.M. ; Shirley, J.H. ; Parker, T.E. ; Levi, F.
Author_Institution :
Time & Frequency Div., Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
Since November of 1998, we have performed four uncertainty evaluations on NIST F-1, our laser-cooled cesium fountain. The results from the latest evaluation have a statistical uncertainty of 2.6×10-15 and an uncorrected bias of 1.1×10-15. This paper presents a brief overview of the evaluations and their uncertainties
Keywords :
atomic clocks; frequency standards; laser cooling; Cs; NIST; NIST F-1; accuracy; cesium fountain primary frequency standard; laser-cooled cesium fountain; overview; statistical uncertainty; uncertainty evaluations; uncorrected bias; Atom lasers; Atom optics; Atomic beams; Fluorescence; Frequency; Laser beams; NIST; Optical attenuators; Optical beams; Uncertainty;
Conference_Titel :
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Conference_Location :
Besancon
Print_ISBN :
0-7803-5400-1
DOI :
10.1109/FREQ.1999.840695
