Development and implementation of an automated four-terminal-pair Josephson impedance bridge

Author:

Pimsut YaowaretORCID,Bauer StephanORCID,Kraus MarcoORCID,Behr RalfORCID,Kruskopf MattiasORCID,Kieler OliverORCID,Palafox LuisORCID

Abstract

Abstract The four-terminal-pair impedance bridge using pulse-driven Josephson voltage standards at PTB has been fully automated. The same bridge configuration was employed to determine R:R and C:C ratios over the frequency range between 53 Hz to 50 kHz. Only minor changes are needed to cover this large frequency range: amplifiers to increase the sensitivity of the current detections for low frequencies and signal generators with higher resolution at high frequencies to reach 50 kHz. Furthermore, the bridge can be operated for quadrature R:(1/ωC) measurements. The combined standard uncertainties (k = 1) for the new bridge were evaluated for all operating frequencies. They reach 2 nF F−1 and 4 nΩ Ω−1 at 1233.15 Hz. At this frequency, the 10 nF:10 nF ratio matched the ratio of PTB’s bridge employing inductive voltage dividers within 1 nF F−1 ± 3 nF F−1 (k = 1). Over 45 days, the 10 nF:10 nF ratio deviated less than −2 nF F−1 ± 3 nF F−1 (k = 1). The 12.9 kΩ:10 kΩ ratio at 53 Hz differed −2 nΩ Ω−1 ± 5 nΩ Ω−1 (k = 1) from the DC ratio measured by the PTB’s cryogenic current comparator bridge. Using a 12.9 kΩ resistance standard and a graphene AC quantum Hall resistance, the 10 nF:10 nF ratios derived from quadrature measurements agreed with the PTB’s inductive voltage divider bridge better than 9 nF F−1 ± 13 nF F−1 (k = 1).

Funder

European Metrology Programme for Innovation and Research

Publisher

IOP Publishing

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Demonstrating the Versatility of a Josephson Impedance Bridge;2024 Conference on Precision Electromagnetic Measurements (CPEM);2024-07-08

2. Long-term Study on Travelling Standards for Capacitance and Resistance;2024 Conference on Precision Electromagnetic Measurements (CPEM);2024-07-08

3. Comparison of Josephson Impedance Bridges;2024 Conference on Precision Electromagnetic Measurements (CPEM);2024-07-08

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