A precise evaluation of NbN-based 1-V programmable Josephson voltage standard arrays

A precise evaluation of NbN-based 1-V programmable Josephson voltage standard arrays

A NbN-based programmable Josephson voltage standard arrays (PJVAs) have been investigated. We show that these arrays can be utilized for programmable operation up to /spl plusmn/1 V. The results of direct comparisons between the PJVA and a conventional superconductor-insulator-superconductor Josephs...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement 2005-04, Vol.54 (2), p.645-648
Hauptverfasser: Urano, C., Murayama, Y., Iwasa, A., Shoji, A., Yamamori, H., Ishizaki, M.
Format: Artikel
Sprache:eng
Schlagworte:
Arrays
Calibration
Electric potential
Filters
Frequency
Instrumentation
Josephson array
Josephson junctions
Measurement standards
programmable voltage standard
Superconducting device noise
Superconducting devices
Superconducting transition temperature
superconducting-normal-superconducting junction
Testing
Uncertainty
Voltage
voltage measurement
voltage standard
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Beschreibung
Zusammenfassung:A NbN-based programmable Josephson voltage standard arrays (PJVAs) have been investigated. We show that these arrays can be utilized for programmable operation up to /spl plusmn/1 V. The results of direct comparisons between the PJVA and a conventional superconductor-insulator-superconductor Josephson array agree at voltages between 0.1 V and 1 V within an uncertainty of better than 1 nV. An indirect comparison via a Zener voltage reference also shows agreement within a 1/spl sigma/ type A uncertainty of 13 nV.
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2005.843530