The European ACQHE project: modular system for the calibration of capacitance standards based on the quantum hall effect

摘要

Starting in 1998 a project funded by the European Commission has been carried out in a co-operation of seven partners. The aim of this project was to establish a measurement system which allows the calibration of standard capacitors in terms of R{sub}(K-90). The whole system comprises suitable quantum Hall samples, an automated bridge system and auxiliary devices to calibrate and characterize the whole set-up. The uncertainty for the calibration of a 10-pF capacitor is about 1 part in 10{sup}7.