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A cryogenic current comparator (CCC) is an instrument of great importance in electrical metrology, which provides a ratio of two currents with ultimate accuracy based on superconductivity. It is used for dc resistance calibration in many national metrology institutes. Conventional CCCs consist of multi-turn coils of wire windings, a multi-layered shield of superconductor foils and a separate SQUID...
A new implementation of Sullivan-Dziuba type cryogenic current comparators (CCCs) is proposed. We designed an integrated CCC device consisting of a thin-film CCC, a pick-up coil and a SQUID sensor on a single chip. Prototype devices were fabricated by using a superconductor multilayer integrated circuit technology with chemical-mechanical polishing processes.
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