Title :
Accuracy evaluation of a cesium fountain primary frequency standard at NIST
Author :
Meekhof, D.M. ; Jefferts, S.R. ; Stepanovíc, M. ; Parker, T.E.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
fDate :
4/1/2001 12:00:00 AM
Abstract :
A new laser-cooled Cs fountain primary frequency standard has been constructed at the National Institute of Standards and Technology (NIST) in Boulder, CO. The new standard, NIST-F1, is described here, including details of systematic frequency biases for which frequency corrections are made. We have submitted two evaluations to the Bureau International des Poids et Mesures (BIPM), which have Type A (statistical) uncertainties less than 1.5×10-15 and Type B (systematic) uncertainties less than 0.9×10-15
Keywords :
caesium; frequency standards; measurement uncertainty; probability; spectral line shift; statistical analysis; BIPM; Bureau International des Poids et Mesures; Cs; Cs fountain; NIST; National Institute of Standards and Technology; frequency corrections; measurement uncertainties; primary frequency standard; statistical uncertainties; systematic uncertainties; Atom lasers; Atomic beams; Atomic measurements; Frequency conversion; Laser beams; Laser transitions; Masers; NIST; Saturation magnetization; Uncertainty;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
