Improved accuracy evaluation of the NPL-CsF2 primary frequency standard

Ruoxin Li, Kurt Gibble, Krzysztof Szymaniec

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Presented is quantitative evaluation of two leading uncertainties in the NPL-CsF2 fountain frequency standard. The distributed cavity phase shift evaluation is based on recent theoretical model where the cavity field is decomposed into a series of 2D Fourier components in azimuthal angle in the cylindrical cavity. Predictions of the model are reproduced experimentally. The microwave lensing effect is caused by dipole forces originating from radial variation of the microwave field amplitude and cavity apertures. The new evaluation of the two effects together with other recent improvements reduce the total type B uncertainty of NPL-CsF2 to 2.3 × 10-16.

Original languageEnglish (US)
Title of host publication2011 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum, IFCS/EFTF 2011 - Proceedings
DOIs
StatePublished - Nov 7 2011
Event5th Joint Conference of the 65th IEEE International Frequency Control Symposium, IFCS 2011 and 25th European Frequency and Time Forum, EFTF 2011 - San Fransisco, CA, United States
Duration: May 1 2011May 5 2011

Other

Other5th Joint Conference of the 65th IEEE International Frequency Control Symposium, IFCS 2011 and 25th European Frequency and Time Forum, EFTF 2011
CountryUnited States
CitySan Fransisco, CA
Period5/1/115/5/11

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Li, R., Gibble, K., & Szymaniec, K. (2011). Improved accuracy evaluation of the NPL-CsF2 primary frequency standard. In 2011 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum, IFCS/EFTF 2011 - Proceedings [5977817] https://doi.org/10.1109/FCS.2011.5977817