Initial Study of the distributed cavity phase shift for the new microwave cavities of Cs fountains at NIST

Published

April 24, 2022

Author(s)

Gregory Hoth, Bijunath Patla, Neil Ashby, Vladislav Gerginov

Abstract

The microwave cavities of NIST-F1, the cesium fountain primary frequency standard at the National Institute of Standards and Technology (NIST), have been replaced with a new design. The distributed cavity phase (DCP) bias of the new cavity must be investigated. Here, we describe an initial study of the DCP bias using the techniques developed by Li and Gibble [Li and Gibble, Metrologia 41 (2004), Li and Gibble Metrologia 47 (2010)]. We solve for the field distribution in the Ramsey cavity using a relatively simple 3D finite element model. Density matrix simulations using this field model suggest that the DCP errors of the new cavity design are manageably small.

Proceedings Title

Proceedings of the 2022 Joint conference of the European Frequency and Time Forum & the IEEE International Frequency Control Symposium

Conference Dates

April 25-28, 2022

Conference Location

Paris, FR

Conference Title

2022 Joint conference of the European Frequency and Time Forum & the IEEE International Frequency Control Symposium

Pub Type

Conferences

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Keywords

Cesium fountain clock, distributed cavity phase shift, finite element modeling frequency bias

Citation

Hoth, G. , Patla, B. , Ashby, N. and Gerginov, V. (2022), Initial Study of the distributed cavity phase shift for the new microwave cavities of Cs fountains at NIST, Proceedings of the 2022 Joint conference of the European Frequency and Time Forum & the IEEE International Frequency Control Symposium , Paris, FR, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934788 (Accessed April 28, 2024)