Work

Measurement of the Boltzmann constant by Johnson noise thermometry using a superconducting integrated circuit

Year: 2017

Type: article

Abstract: We report on our measurement of the Boltzmann constant by Johnson noise thermometry (JNT) using an integrated quantum voltage noise source (IQVNS) that is fully implemented with superconducting integrated circuit technology. The IQVNS generates calculable pseudo white noise voltages to calibrate the JNT system. The thermal noise of a sensing resistor placed at the temperature of the triple point of water was measured precisely by the IQVNS-based JNT. We accumulated data of more than 429 200 s in total (over 6 d) and used the Akaike information criterion to estimate the fitting frequency range for the quadratic model to calculate the Boltzmann constant. Upon detailed evaluation of the uncertainty components, the experimentally obtained Boltzmann constant was J K −1 with a relative combined uncertainty of . The value of k is relatively lower than the CODATA 2014 value (Mohr et al 2016 Rev. Mod. Phys . 88 035009).

Source: Metrologia

DOI: 10.1088/1681-7575/aa7cdd

Authors: C Urano, K Yamazawa, N-H Kaneko

Institutions: National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, National Institute of Technology and Evaluation

Language: English

Topic: Scientific Measurement and Uncertainty Evaluation

Subfield: Statistics, Probability and Uncertainty

Field: Decision Sciences

Domain: Social Sciences

Open Access status: hybrid

Estimated APC paid: $3,325

Funders: National Institute of Advanced Industrial Science and Technology, Japan Society for the Promotion of Science