Elmquist, R.
and Hartland, A.
(2016),
Reference Module in Materials Science and Materials Engineering MATS 01908, Reference Module in Materials Science and Materials Engineering
(Accessed April 20, 2025)
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Reference Module in Materials Science and Materials Engineering MATS 01908
Published
Author(s)
, Anthony Hartland
Abstract
The cryogenic current comparator is used to maintain national representations of the ohm based on the quantized Hall resistance standard. The measurement technique utilizes the Meissner effect to establish accurate resistance ratios with specialized cryogenic bridge circuits. In these bridges identical voltages appear across the resistance elements to be compared, and the unknown resistance can be calculated from the ampere-turns balance maintained by a superconducting quantum interference device.Citation
Reference Module in Materials Science and Materials Engineering
Pub Type
Others
Keywords
superconducting devices, instrumentation and measurement, resistance standard, quantized Hall resistance standard, calibration, flux transformer, superconducting quantum interference device, Meissner effect
Citation
Issues
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Created February 1, 2016, Updated February 19, 2017