Administration of EMP-related Publications
year | 2014 |
author(s) | Casey, A., Saunders, J., Lusher, C., Batey, G., Shibahara, A., Levitin, L., Arnold, F., van der Vliet, H., Drung, D., Schurig, T., Cuthbert, M. and Matthews, A., |
title | Current Sensing Noise Thermometry: A fast practical solution to low temperature measurement |
document type | Paper |
source | J. Low Temp. Phys, 175, 764-775 (2014) |
doi | 10.1007/s10909-014-1147-z |
EMP/Horizon2020 | This publication does not include a EMP/Horizon2020 acknowledgement. |
abstract | We describe the design and performance of a series of fast, precise current sensing noise thermometers. The thermometers have been fabricated with a range of resistances from 1.290 down to 0.2 mΩ. This results in either a thermometer that has been optimised for speed, taking advantage of the improvements in superconducting quantum interference device noise and bandwidth, or a thermometer optimised for ultra-low temperature measurement, minimising the system noise temperature. With a single temperature calibration point, we show that noise thermometers can be used for accurate measurements over a wide range of temperatures below 4 K. Comparisons with a melting curve thermometer, a calibrated germanium thermometer and a pulsed platinum nuclear magnetic resonance thermometer are presented. For the 1.290 Ω resistance we measure a 1 % precision in just 100 ms, and have shown this to be independent of temperature. |