D5: Report on the operation of a graphene based quantum impedance standard within a Josephson impedance bridge at frequencies up to 50 kHz (with a base uncertainty below 0.01 μΩ/Ω), and a full digital bridge for simplified operation (with a base target uncertainty in the 0.1 μΩ/Ω range), at frequencies around 1 kHz, with capacitance traceable to the graphene AC-QHR
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F22%3AN0000072" target="_blank" >RIV/00177016:_____/22:N0000072 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
D5: Report on the operation of a graphene based quantum impedance standard within a Josephson impedance bridge at frequencies up to 50 kHz (with a base uncertainty below 0.01 μΩ/Ω), and a full digital bridge for simplified operation (with a base target uncertainty in the 0.1 μΩ/Ω range), at frequencies around 1 kHz, with capacitance traceable to the graphene AC-QHR
Original language description
Even the most accurate impedance bridge is not able to measure the impedance of one impedance standard at its own. These high precision measurement instruments always compare two impedances and obtain the ratio of both. To determine the impedance of one of the standards, that of the other one must be known with the required uncertainty. Therefore, one of the major aims of this project was to combine the outcomes of the WP1, WP2 and WP3 tasks to set up a universal quantum-based impedance standard for the realisation of the electrical units. Graphene-based AC QHR were combined with digital and Josephson impedance bridges from WP2. This combination not only offers a universal and flexible set-up for impedance metrology, but it will serve as a tool to investigate the sensitivity of the graphene-based AC-QHR samples.
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering
Result continuities
Project
<a href="/en/project/8B19009" target="_blank" >8B19009: Graphene impedance quantum standard</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů