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Bauch, A*; Achkar, J*; Bize, S*; Calonico, D*; Dach, R*; Hlavac, R*; Lorini, L*; Parker, T*; Petit, G*; Piester, D; Szymaniec, K; Uhrich, P* (2006) Comparison between frequency standards in Europe and the USA at the 10-15 uncertainty level. Metrologia, 43 (1). pp. 109-120.

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

Beattie, S; Jian, B; Alcock, J; Gertsvolf, M; Hendricks, R J; Szymaniec, K; Gibble, K (2019) NRC-FCs2 primary frequency standard at the National Research Council Canada. In: 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC), 9-15 March 2019, New Delhi, India.

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C

Chalupczak, W; Godun, R M; Anielski, P*; Wojciechowski, A*; Pustelny, S* (2012) Enhancement of optically pumped spin orientation via spin exchange collisions at low vapour density. Phys. Rev. A, 85 (4). 043402

E

Edwards, C S; Barwood, G P; Gill, P; Rowley, W R C (2002) Development of a 778 nm rubidium two-photon diode laser frequency standard. In: Proceedings of the 6th Symposium on Frequency Standards and Metrology, 9-14 September 2001, University of St Andrews, Fife, Scotland, UK.

G

Gibble, K*; Lea, S N; Szymaniec, K (2012) A microwave cavity designed to minimize distributed cavity phase errors in a primary cesium frequency standard. In: 2012 Conference on Precision Electromagnetic Measurements (CPEM 2012), 1-6 July 2012, Washington DC, USA.

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H

Henderson, D; Lea, S N; Szymaniec, K; Whibberley, P B (2001) Towards a caesium fountain frequency standard at the NPL. In: Proceedings of the 15th European Frequency and Time Forum (EFTF), March 2001, Neuchatel, Switzerland.

Henderson, D; Lea, S N; Szymaniec, K; Whibberley, P B (2001) Towards a ceasium fountain frequency standard at the NPL. In: BEMC 2001- 10th British Electromagnetic Measurement Conference, 6-8 November 2001, Harrogate, UK.

Henderson, D; Whibberley, P B; Szymaniec, K; Lea, S N (1999) Towards a caesium fountain frequency standard at NPL. In: BEMC 99 - 9th International Conference on Electromagnetic Measurement, November 1999, Brighton, UK.

Hendricks, R J; Burrows, K; Szymaniec, K (2019) Robust Cs fountain clocks, novel evaluation tools and flexible operational configurations. In: URSI Asia-Pacific Radio Science Conference (AP-RASC), 9-15 March 2019, New Delhi, India.

Hendricks, R J; Ozimek, F; Szymaniec, K; Dunst, P; Nagorny, B; Nawrocki, J; Beattie, S; Jian, B; Chen, W; Gibble, K (2017) Design and performance of Cs fountain frequency standards constructed for metrology laboratories. In: 2017 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFC), 9-13 July 2017, Besancon, France.

Hendricks, R J; Ozimek, F; Szymaniec, K; Nagorny, B; Dunst, P; Nawrocki, J; Beattie, S; Jian, B; Gibble, K (2019) Cs Fountain Clocks for Commercial Realizations—An Improved and Robust Design. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 66 (3). pp. 624-631. ISSN 0885-3010

K

Knapp, M; Walby, S; Haji, M; Foot, C; Gill, P (2023) Progress Towards a Compact Cold-Atom Microwave Clock. In: 2023 Joint Conference of the European Frequency and Time Forum and IEEE Frequency Control Symposium (EFTF/IFCS), 15-19 May 2023, Toyama, Japan.

L

Lea, S N; Burt, E A*; Prestage, J D*; Taghavi, S*; Tjoelker, R L* (2008) A dual-isotope mercury ion clock to search for variation in fundamental constants. In: 7th Symposium on Frequency Standards and Metrology, 5-11 October 2008, Pacific Grove, California, USA.

Lea, S N; Taghavi-Larigani, S*; Burt, E A*; Prestage, J D*; Tjoelker, R L* (2009) A New Trapped Ion Clock Based On 201Hg+. In: European Frequency and Time Forum – International Frequency Control Symposium) EFTF-IFCS Joint Conference 2009, 20-24 April 2009, Besancon, France.

Li, R X*; Gibble, K*; Szymaniec, K (2011) Improved accuracy of the NPL-CsF2 primary frequency standard: evaluation of distributed cavity phase and microwave lensing frequency shifts. Metrologia, 48 (5). pp. 283-289.

M

Margolis, H (2017) A matter of time. Nature Physics, 13 (12). p. 1234.

Marra, G; Slavik, R*; Margolis, H S; Lea, S N; Petropoulos, P*; Richardson, D J*; Gill, P (2011) High resolution microwave frequency transfer over a 86 km-long optical fiber network using a mode-locked laser.. Opt. Lett., 36 (4). pp. 511-513.

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Mulholland, S.; Klein, H. A.; Barwood, G. P.; Donnellan, S.; Nisbet-Jones, P. B. R.; Huang, G.; Walsh, G.; Baird, P. E. G.; Gill, P. (2019) Compact laser system for a laser-cooled ytterbium ion microwave frequency standard. Review of Scientific Instruments, 90 (3). 033105 ISSN 0034-6748

O

Ovchinnikov, B M*; Ovchinnikov, Y B; Parusov, V V* (2012) Massive liquid Ar and Xe detectors for direct Dark Matter searches. JETP Lett., 96 (3). pp. 149-152.

Ovchinnikov, Y B (2013) Development of NPL Rb fountain frequency standard. In: 2012 European Frequency and Time Forum (EFTF 2012), 23-27 April 2013, Gothenburg, Sweden.

Ovchinnikov, Y B; Marra, G (2011) Accurate rubidium atomic fountain frequency standard. Metrologia, 48 (3). pp. 87-100.

Ovchinnikov, Y B; Marra, G (2011) Reply to comment on "Accurate rubidium atomic frequency standard". Metrologia, 48 (5). pp. 448-449.

Ovchinnikov, Y B; Szymaniec, K; Edris, S* (2015) Measurement of rubidium ground-state hyperfine transition frequency using atomic fountains. Metrologia, 52 (4). pp. 595-599.

P

Piriz, R; Garbin, E; Roldan, P; Keith, M; Shaw, B; Shemar, S; Burrows, K; Davis, J; Binda, S (2019) PulChron: A Pulsar Time Scale Demonstration for PNT systems. In: 50th Annual Precise Time and Time Interval Systems and Applications, 28-31 January 2019, Reston, VA, USA.

S

Svela, A O; Silver, J M; Del Bino, L; Zhang, S; Woodley, M T M; Vanner, M R; Del'Haye, P (2020) Coherent suppression of backscattering in optical microresonators. Light: Science & Applications, 9 (1). 204 ISSN 2047-7538

Szymaniec, K; Chalupczak, W; Henderson, D (2003) Initial evaluation of the NPL caesium fountain frequency standard. In: Proceedings of the 2003 IEEE International Frequency Control Symposium and PDS Exhibition (jointly with the 17th European Frequency and Time Forum), 3-9 May 2003, Tempa, Florida, USA.

Szymaniec, K; Chalupczak, W; Whibberley, P B; Lea, S N; Henderson, D (2005) Evaluation of the primary frequency standard NPL-CsF1. Metrologia, 42 (1). pp. 49-57.

Szymaniec, K; Chalupczak, W; Whibberley, P B; Lea, S N; Henderson, D (2006) Reply to the comment on 'Evaluation of the primary frequency standard NPL-CsF1'. Metrologia, 43 (3). L18-19

Szymaniec, K; Hendricks, R J; Turza, K; Nagórny, B; Dunst, P; Nawrocki, J; Krehlik, P; Śliwczyński, Ł; Czubla, A (2018) Operation of caesium fountain frequency standards with remote hydrogen maser references. Metrologia, 55 (6). pp. 782-788. ISSN 0026-1394

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Szymaniec, K; Lea, S N; Liu, K* (2014) An evaluation of the frequency shift caused by collisions with background gas in the primary frequency standard NPL-CsF2. IEEE Trans. Ultrason. Feroelectr. Freq. Control, 61 (1). pp. 203-206.

Szymaniec, K; Noh, H R*; Park, S E*; Takamizawa, A* (2013) Spin polarization in a freely evolving sample of cold atoms. Appl. Phys. B, Laser Opt., 111 (3). pp. 527-535.

Szymaniec, K; Park, S E* (2011) Primary frequency standard NPL-CsF2: optimised operation near the collisional shift cancellation point. IEEE Trans. Instrum. Meas., 60 (7). pp. 2475-2481.

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W

Whibberley, P B; Henderson, D; Lea, S N (1999) Development of a caesium fountain primary frequency standard at the NPL. In: Proc. 1999 Joint Meeting of the European Frequency and Time Forum and the IEEE International Frequency Control Symposium, 13-16 April 1999, Besancon, France.

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Woodley, M T M; Hill, L; Del Bino, L; Oppo, G L; Del’Haye, P (2021) Self-Switching Kerr Oscillations of Counterpropagating Light in Microresonators. Physical Review Letters, 126 (4). 043901 ISSN 0031-9007

Z

Zucco, M*; Dudle, G*; Webb, C*; Whibberley, P B; Lea, S N; Henderson, D (1997) Current progress with the NPL caesium fountain frequency standard. In: Proc. EFTF 97, European Frequency and Time Forum, 4 - 6 March 1997, Neuchatel, Switzerland.