Objective This project is related to the development of the European measurement and testing infrastructure. A new quantum standard based on the quantum Hall effect for the calibration of capacitors will be developed. It will guarantee a relative calibration uncertainty of 10-7.There are only a few European National Metrological Institutes (NMIs) with an AC metrology capability which is sufficiently developed to be able to calibrate capacitors with relative uncertainties of 10 6 or better. The majority of the European NMIe is obliged to link their capacitance metrology via travelling standards. They thereby loose a factor of about ten in accuracy when they disseminate the unit to industrial laboratories in their countries compared to the procedure in the higher developed EC countries. The total number of capacitance calibrations in the EC at the highest level, the top of the calibration pyramid amounts to about 200 per year. The advantage of a quantum standard is that its value depends only on fundamental physical constants. At any time and at any location this standard provides the user with the same value. This is in contrast to the travelling standards which industrial laboratories and the smaller NM. Is have to use. Industrial laboratories and NMI using the new standard in the future will become independent and more importantly, is able to reduce the uncertainty of their capacitance calibrations by 2 factors of ten to one hundred. Any industrial company working under a quality management system and using working standards has to prove traceability. Capacitance standards are particularly important to the aerospace and the electro-technical industry. The top industrial calibration laboratories are now at the point where it is not possible for them tc reduce their uncertainties with existing equipment. To be able to follow the worldwide trend of decreasing uncertainties - a factor often every 20 years -new and improved techniques and equipment are necessary. The aim of this proposal is to concentrate the knowledge and experience of foul larger NMIs, a university institute and two NMIs of smaller countries to develop in 2 common effort an easy to handle modular AC quantum standard for the calibration of capacitance. Each of the self-contained modules - optimised AC quantum Hall samples, - automated capacitance ratio bridge, - automated quadrature bridge, - improved AC standards constitutes a useful equipment which can also be used for various application outside the proposed system. The final system will be presented in a workshop to all interested persons from NMIs and industrial calibration laboratories of the EC. The modular construction will make it possible for them to rebuild either the whole system or to extend their existing facilities. This will give all European NMIs including the new founded NMIs in Middle and East Europe and European industrial laboratories the best possible starting conditions by reducing the differences in the level of certified uncertainties with respect to the higher developed countries quantum Hall, quantum standard, capacitance, electric, units, AC Programme(s) FP4-INCO - Specific research, technological development and demonstration programme in the field of cooperation with third countries and international organizations, 1994-1998 Topic(s) 0202 - Physics Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator Bundesrepublik Deutschland EU contribution No data Address 38023 Braunschweig Germany See on map Total cost No data Participants (1) Sort alphabetically Sort by EU Contribution Expand all Collapse all Czech Technical University Czechia EU contribution No data Address 2,Technicka 166 29 Praha 6 See on map Total cost No data
