953 lines
79 KiB
Text
953 lines
79 KiB
Text
<!DOCTYPE html>
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<html lang="en" dir="ltr" prefix="content: http://purl.org/rss/1.0/modules/content/ dc: http://purl.org/dc/terms/ foaf: http://xmlns.com/foaf/0.1/ og: http://ogp.me/ns# rdfs: http://www.w3.org/2000/01/rdf-schema# schema: http://schema.org/ sioc: http://rdfs.org/sioc/ns# sioct: http://rdfs.org/sioc/types# skos: http://www.w3.org/2004/02/skos/core# xsd: http://www.w3.org/2001/XMLSchema# ">
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<h1 class="nist-page__title">NIST-F3, a cesium fountain frequency reference</h1>
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<div class="nist-field__label">Published</div>
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<div class="nist-field__item"><time datetime="2023-01-24T12:00:00Z">January 24, 2023</time>
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<h3 class="nist-field__label">Author(s)</h3>
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<div class="nist-field__item"><span class="nist-author">Gregory Hoth</span>, Alexander Radnaev, Peter Mitchell, <span class="nist-author">Jeffrey Sherman</span>, <span class="nist-author">Vladislav Gerginov</span></div>
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<h3>Abstract</h3>
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A cesium fountain frequency reference known as NIST-F3 is under development at the National Institute of Standards and Technology (NIST). The fountain is intended to provide input for the NIST timescale and assist with evaluation of NIST's primary and secondary frequency standards. Here, we describe details of the NIST-F3 apparatus and demonstrate a short-term frequency stability of $2.2\times10^-13}/\sqrt\tau}$ up to averaging times of $2\times10^4$ s. We also present an initial evaluation of the main frequency biases. Due to the particulars of the microwave cavity design employed in NIST-F3, the fountain exhibits a relatively large tilt sensitivity. We measure shifts of order $10^-14}/\mathrmmrad}$ when tilting the fountain. Despite this complication, we show that the tilt sensitivity can be managed with the standard techniques that have been developed for cold-atom fountains. This initial investigation suggests it will be possible to achieve our goal of a fractional frequency stability better than $0.5\times10^-15}$ for up to a few months of averaging time.
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<div class="nist-field__label">Conference Dates</div>
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<div class="nist-field__item">January 23-26, 2023</div>
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<div class="nist-field__item">Precise Time and Time Interval Systems and Applications 2023</div>
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Hoth, G.
|
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, Radnaev, A.
|
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, Mitchell, P.
|
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, Sherman, J.
|
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and Gerginov, V.
|
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(2023),
|
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NIST-F3, a cesium fountain frequency reference, Precise Time and Time Interval Systems and Applications 2023, Long Beach, CA, US, [online], https://doi.org/10.33012/2023.18691, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936233
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Created January 24, 2023, Updated June 7, 2024
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