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The National Physical Laboratory (NPL) requirement is for a complete primary voltage calibration system built around a Josephson array quantum standard.
The purpose is to move away from the current generation of standards that use liquid helium to cool the sample to one that is liquid cryogen-free with the aim that no liquid helium should be required for either cool-down or routine operation, and hence the system should be capable of continuous operation for periods of at least several months.
The system should be capable of providing:
SI traceable DC voltages up to 10 V, with an uncertainty better than 1 nV/V.
software to run the system and automate the calibration of standards.
the capability to generate AC voltages up to a few kHz.
To express interest in this tender please use the following URL: https://lupc.bravosolution.co.uk/web/login.shtml and search for 'ITT: itt_2533 - ITT_123111 - Cryogen Free Josephson Junction (JJ) Voltage System'
No supplier information available.