Realization of an Inductance Scale Traceable to the Quantum Hall Effect Using an Automated Synchronous Sampling System

TL;DR

This paper presents a new automated system for realizing an inductance scale directly traceable to the quantum Hall effect, covering a wide range of inductances and frequencies with high accuracy.

Contribution

It introduces a versatile, automated synchronous sampling system capable of directly realizing the henry unit from resistance standards, validated through an international comparison.

Findings

Achieved low uncertainties around 12 μH/H for 10 mH to 100 mH inductances.

Successfully validated the system during an international comparison.

Demonstrated the system's versatility for various impedance comparisons.

Abstract

In this paper, the realization of an inductance scale from 1~$\mu$H to 10~H for frequencies ranging between 50~Hz to 20~kHz is presented. The scale is realized directly from a series of resistance standards using a fully automated synchronous sampling system. A careful systematic characterization of the system shows that the lowest uncertainties, around 12~$\mu$H/H, are obtained for inductances in the range from 10~mH to 100~mH at frequencies in the kHz range. This new measurement system which was successfully evaluated during an international comparison, provides a primary realization of the henry, directly traceable to the quantum Hall effect. An additional key feature of this system is its versatility. In addition to resistance-inductance (R-L) comparison, any kind of impedances can be compared: R-R, R-C, L-L or C-C, giving this sampling system a great potential of use in many laboratories around the world.