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Title: Investigation of uncertainty components in Coulomb blockade thermometry

Coulomb blockade thermometry (CBT) has proven to be a feasible method for primary thermometry in every day laboratory use at cryogenic temperatures from ca. 10 mK to a few tens of kelvins. The operation of CBT is based on single electron charging effects in normal metal tunnel junctions. In this paper, we discuss the typical error sources and uncertainty components that limit the present absolute accuracy of the CBT measurements to the level of about 1 % in the optimum temperature range. Identifying the influence of different uncertainty sources is a good starting point for improving the measurement accuracy to the level that would allow the CBT to be more widely used in high-precision low temperature metrological applications and for realizing thermodynamic temperature in accordance to the upcoming new definition of kelvin.
Authors:
; ;  [1] ; ; ;  [2] ; ;  [3] ; ;  [4]
  1. MIKES Centre for Metrology and Accreditation, Tekniikantie 1, 02150 Espoo (Finland)
  2. Low Temperature Laboratory, Aalto University, Tietotie 3, 02150 Espoo (Finland)
  3. VTT Technical Research Centre of Finland, Tietotie 3, 02150 Espoo (Finland)
  4. Aivon Oy, Tietotie 3, 02150 Espoo (Finland)
Publication Date:
OSTI Identifier:
22218013
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1552; Journal Issue: 1; Conference: 9. international temperature symposium, Los Angeles, CA (United States), 19-23 Mar 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ACCURACY; ELECTRONS; ERRORS; HETEROJUNCTIONS; METALS; OPERATION; TEMPERATURE MEASUREMENT; TEMPERATURE RANGE 0000-0013 K; THERMOMETERS; TUNNEL EFFECT