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Shibahara A, Hahtela O, Engert J, et al. Primary current-sensing noise thermometry in the millikelvin regime. Philos Trans A Math Phys Eng Sci. 2016;374(2064):20150054doi: 10.1098/rsta.2015.0054.
Shibahara, A., Hahtela, O., Engert, J., van der Vliet, H., Levitin, L. V., Casey, A., Lusher, C. P., Saunders, J., Drung, D., & Schurig, T. (2016). Primary current-sensing noise thermometry in the millikelvin regime. Philosophical transactions. Series A, Mathematical, physical, and engineering sciences, 374(2064), 20150054. https://doi.org/10.1098/rsta.2015.0054
Shibahara, A, et al. "Primary current-sensing noise thermometry in the millikelvin regime." Philosophical transactions. Series A, Mathematical, physical, and engineering sciences vol. 374,2064 (2016): 20150054. doi: https://doi.org/10.1098/rsta.2015.0054
Shibahara A, Hahtela O, Engert J, van der Vliet H, Levitin LV, Casey A, Lusher CP, Saunders J, Drung D, Schurig T. Primary current-sensing noise thermometry in the millikelvin regime. Philos Trans A Math Phys Eng Sci. 2016 Mar 28;374(2064):20150054. doi: 10.1098/rsta.2015.0054. PMID: 26903094.
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Philos Trans A Math Phys Eng Sci. 2016 Mar 28;374(2064):20150054. doi: 10.1098/rsta.2015.0054.

Primary current-sensing noise thermometry in the millikelvin regime.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences

A Shibahara, O Hahtela, J Engert, H van der Vliet, L V Levitin, A Casey, C P Lusher, J Saunders, D Drung, Th Schurig

Affiliations

  1. Department of Physics, Royal Holloway University of London, Egham TW20 0EX, UK [email protected].
  2. VTT Technical Research Centre of Finland, PO Box 1000, 02044 VTT Espoo, Finland.
  3. Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, 10587 Berlin, Germany.
  4. Department of Physics, Royal Holloway University of London, Egham TW20 0EX, UK.

PMID: 26903094 DOI: 10.1098/rsta.2015.0054

Abstract

The use of low-temperature platforms with base temperatures below 1 K is rapidly expanding, for fundamental science, sensitive instrumentation and new technologies of potentially significant commercial impact. Precise measurement of the thermodynamic temperature of these low-temperature platforms is crucial for their operation. In this paper, we describe a practical and user-friendly primary current-sensing noise thermometer (CSNT) for reliable and traceable thermometry and the dissemination of the new kelvin in this temperature regime. Design considerations of the thermometer are discussed, including the optimization of a thermometer for the temperature range to be measured, noise sources and thermalization. We show the procedure taken to make the thermometer primary and contributions to the uncertainty budget. With standard laboratory instrumentation, a relative uncertainty of 1.53% is obtainable. Initial comparison measurements between a primary CSNT and a superconducting reference device traceable to the PLTS-2000 (Provisional Low Temperature Scale of 2000) are presented between 66 and 208 mK, showing good agreement within the k=1 calculated uncertainty.

© 2016 The Author(s).

Keywords: PLTS-2000; SQUID; noise; primary; thermometry; uncertainty

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