O. Hahtela, A. Kemppinen, J. Lehtinen, A. Manninen, E. Mykkänen, M. Prunnila, N. Yurttagül, F. Blanchet, M. Gramich, B. Karimi, E. Mannila, J. Muhojoki, J. Peltonen, J. Pekola
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Coulomb Blockade Thermometry on a Wide Temperature Range
The Coulomb Blockade Thermometer (CBT) is a primary thermometer for cryogenic temperatures, with demonstrated operation from below 1 mK up to 60 K. Its performance as a primary thermometer has been verified at temperatures from 20 mK to 200 mK at uncertainty level below 1% ($k=2$). In a new project, our aim is to extend the metrologically verified temperature range of the primary CBT up to 25 K. We also demonstrate close-to-ideal operation of a CBT with only two tunnel junctions when the device is embedded in a low-impedance environment.
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