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First accuracy evaluation of the NRC-FCs2 primary frequency standard

Beattie, S; Jian, B; Alcock, J; Gertsvolf, M; Hendricks, R; Szymaniec, K; Gibble, K (2020) First accuracy evaluation of the NRC-FCs2 primary frequency standard. Metrologia, 57 (3). 035010 ISSN 0026-1394

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We report the first accuracy evaluation of NRC-FCs2, an atomic fountain clock developed at the National Research Council Canada. The short term stability at high atomic density is 1.1 × 10-13 at 1 second of averaging time. The typical overall fractional type B uncertainty is 2.3 × 10-16. GNSS-based frequency comparisons of NRC-FCs2 with the SI second, as reported by the BIPM over fourteen months, give a fractional frequency difference of -2.4(3.7) × 10-16.

Item Type: Article
Subjects: Time and Frequency > Microwave Frequency Standards
Divisions: Time & Frequency
Identification number/DOI: 10.1088/1681-7575/ab7c54
Last Modified: 16 Jul 2020 13:08
URI: http://eprintspublications.npl.co.uk/id/eprint/8792

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