Improved accuracy evaluation of the NPL-CsF2 primary frequency standard

Ruoxin Li; Kurt Gibble; Krzysztof Szymaniec

doi:10.1109/FCS.2011.5977817

Improved accuracy evaluation of the NPL-CsF2 primary frequency standard

Ruoxin Li, Kurt Gibble, Krzysztof Szymaniec

Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	2011 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum, IFCS/EFTF 2011 - Proceedings
DOIs	https://doi.org/10.1109/FCS.2011.5977817
State	Published - Nov 7 2011
Event	5th 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 2011 → May 5 2011

Other

Other	5th Joint Conference of the 65th IEEE International Frequency Control Symposium, IFCS 2011 and 25th European Frequency and Time Forum, EFTF 2011
Country/Territory	United States
City	San Fransisco, CA
Period	5/1/11 → 5/5/11

All Science Journal Classification (ASJC) codes

General Engineering

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10.1109/FCS.2011.5977817

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title = "Improved accuracy evaluation of the NPL-CsF2 primary frequency standard",

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.",

author = "Ruoxin Li and Kurt Gibble and Krzysztof Szymaniec",

year = "2011",

month = nov,

day = "7",

doi = "10.1109/FCS.2011.5977817",

language = "English (US)",

isbn = "9781612841106",

booktitle = "2011 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum, IFCS/EFTF 2011 - Proceedings",

note = "5th Joint Conference of the 65th IEEE International Frequency Control Symposium, IFCS 2011 and 25th European Frequency and Time Forum, EFTF 2011 ; Conference date: 01-05-2011 Through 05-05-2011",

}

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, 5th 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, 5/1/11. https://doi.org/10.1109/FCS.2011.5977817

Improved accuracy evaluation of the NPL-CsF2 primary frequency standard. / Li, Ruoxin; Gibble, Kurt; Szymaniec, Krzysztof.
2011 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum, IFCS/EFTF 2011 - Proceedings. 2011. 5977817.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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AU - Gibble, Kurt

AU - Szymaniec, Krzysztof

PY - 2011/11/7

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N2 - 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.

AB - 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.

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BT - 2011 Joint Conference of the IEEE International Frequency Control Symposium and European Frequency and Time Forum, IFCS/EFTF 2011 - Proceedings

T2 - 5th Joint Conference of the 65th IEEE International Frequency Control Symposium, IFCS 2011 and 25th European Frequency and Time Forum, EFTF 2011

Y2 - 1 May 2011 through 5 May 2011

ER -

Improved accuracy evaluation of the NPL-CsF2 primary frequency standard

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