10의 -10승 수준에서 조셉슨 전압표준기 불확도 평가 = Uncertainty Evaluation of Josephson Voltage Standard in the level of $10^{-10}$

다국어 초록 (Multilingual Abstract)

The most recent improvement in the 10 V array system was carried out with focusing on noise reduction. We have evaluated the uncertainty of the 10 V Josephson array system after the improvement. The uncertainty evaluation of 10 V standard included a comparison with a programmable Josephson array system at 1 V. Every contribution to the measurement uncertainty was evaluated in the level of $10^{-10}$. The estimated combined uncertainty was found to be approximately $10^{-9}$ at 10 V, which was limited only by the indirect verifying method. In the near future, a direct comparison with another 10 V Josephson voltage standard is expected to be carried out to provide more accurate uncertainty evaluation for the KRISS Josephson voltage standard.

참고문헌 (Reference)

1 "Guide to the Expression of Uncertainty in Measure-ment" ISO 1995

2 "Establishment of Josephson Array Voltage Standard System at KSRI" 317-320, 1990

3 "Comparison CCEM-K8 of DC Voltage Ratio: Results" 52 (52): 419-423, 2003