A Direct Comparison of a Cryocooler-based Automated 10 Volt Josephson Voltage Standard System
نویسنده
چکیده
A commercially available, complete microprocessor controlled, fully automated 10 Volt Josephson voltage standard system with a liquid helium free cooling was developed in cooperation between the Institute of Photonic Technology and the Supracon AG. The system operates with an array of altogether 19,700 SIS Josephson tunnel junctions installed in a pulse tube cooler. The integration of the voltage standard circuit in the cryocooler as well as the properties of different cooling setups are discussed in terms of a stable operation. A direct comparison at a voltage level of 10 Volt between a cryocooledbased Josephson voltage standard system and a liquid-helium based system was performed with a result of 1.3 nV voltage difference and an uncertainty of 5×10.
منابع مشابه
Operation and Accuracy of an Automated Cryocooler-based 10 Volt Josephson Voltage Standard System
A commercially available complete m icroprocessor controlled, f ully au tomated 10 Volt Jos ephson voltage standard system operated with a cryocooler was developed in cooperation between IPHT and Supracon. The system operates with an array of altogether 19,700 SIS Josephson tunnel junctions. A direct comparison to a helium-based system showed an agreement of 1.3 nV at a relative uncertainty of ...
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