Development of thermodynamic temperature measurement system based on quantum voltage noise source at NMIJ

Author

Urano, Chiharu ; Yamada, Tomoaki ; Yamazawa, K. ; Fukuyama, Yasuhiro ; Kaneko, Naoya ; Maruyama, Mihoko ; Domae, Atsushi ; Yamamori, T. ; Yoshida, Sigeru ; Kiryu, Syogo

Author_Institution

Nat. Metrol. Inst. of Japan, AIST, Tsukuba, Japan

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

30

Lastpage

31

Abstract

We have been developing a Johnson noise thermometer (JNT) at NMIJ toward redefinition of the Boltzmann constant k. The JNT system measure thermal noise power of a resistor installed at the triple point of water and power of a reference signal generated with a Quantum Voltage Noise Source (QVNS) alternatively in order to obtain k precisely. Relative differences between experimentally obtained k and the current CODATA value was 7 part in 10^-5. Relative statistical uncertainty of k for 18 hours measurement was 2 parts in 10^-5.

Keywords

constants; electric noise measurement; power measurement; quantum noise; resistors; signal generators; temperature measurement; thermal noise; thermodynamics; thermometers; Boltzmann constant k; CODATA; JNT system; Johnson noise thermometer; NMIJ; QVNS; quantum voltage noise source; reference signal generation; relative statistical uncertainty; resistor; thermal noise power measurement; thermodynamic temperature measurement system; time 18 hour; Electrical resistance measurement; Josephson junctions; Noise; Resistors; Temperature measurement; Thermodynamics; Voltage measurement; Boltzmann constant; Josephson Junctions arrays; Noise thermometry; Quantum Voltage Noise Source; SI unit;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on

Conference_Location

Rio de Janeiro

ISSN

0589-1485

Print_ISBN

978-1-4799-5205-2

Type

conf

DOI

10.1109/CPEM.2014.6898243

Filename

6898243