Title :
Realization of quantum Hall resistance standards at KRISS based on a cryogenic current comparator
Author :
Kim, Wan-Seop ; Yu, Kwang-Min ; Kim, Mun-Seog ; Park, Po Gyu ; Kim, Kyu-Tae
Author_Institution :
Center for Electr. & Magn., Korea Res. Inst. of Stand. & Sci., Daejeon, South Korea
Abstract :
At KRISS we have recently developed a quantum Hall resistance (QHR) standard system adopting a cryogenic current comparator bridge, a He-3 cryostat with a 12 T superconducting magnet, and a home-made air bath with a temperature stability of 23.000°C ± 0.005°C. The performance of the system was verified by calibration of a standard resistor 100 Ω against the QHR at plateau i = 2, RH(2). The combined relative measurement uncertainty (k = 2) is estimated to be about 3.8×10-9.
Keywords :
calibration; cryogenic electronics; cryostats; current comparators; measurement standards; superconducting magnets; He-3 cryostat; KRISS; combined relative measurement uncertainty; cryogenic current comparator bridge; home-made air bath; quantum Hall resistance standards; standard resistor calibration; superconducting magnet; temperature stability; Bridge circuits; Cryogenics; Electric resistance; Electrical resistance measurement; Measurement standards; Resistors; SQUIDs; Standards development; Superconducting coils; Superconducting magnets;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4244-6795-2
DOI :
10.1109/CPEM.2010.5544193
