1V and 10V SNS Programmable Voltage Standards for 70 GHz

Published

June 3, 2009

Author(s)

Franz Mueller, Ralf Behr, T. Weimann, Luis Palafox, David I. Olaya, Paul Dresselhaus, Samuel Benz

Abstract

Programmable Josephson voltage standards (PJVSs) in combination with fast switchable DC current sources have opened up new applications in the field of low frequency AC metrology. The growing interest in output voltages of up to 10 V initiated efforts by several National Metrological Institutes to realize 10 V PJVSs. Presently, only 10 V PJVSs from PTB based on SINIS junctions have been successfully incorporated into existing setups for AC metrology. However, the fabrication of 10 V SINIS arrays which are driven at 70 GHz suffers from very low yield. The recent technological progress made at NIST enabled the drop-in replacement of the low-yield SINIS arrays by more robust SNS arrays. The N-material is an amorphous NbxSi1-x alloy near the metal-insulator transition and is deposited by co-sputtering. For the first time, fully operational 1 V and 10 V PJVSs with SNS junctions that are suitable for a 70 GHz drive have been fabricated and tested. This work was done in close cooperation between NIST and PTB.

Citation

IEEE Transactions on Applied Superconductivity

Volume

19

Issue

3

Pub Type

Journals

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Keywords

Josephson arrays, Programmable Josephson voltage standard, AC Josephson voltage standard, SINIS junction, SNS junction

Citation

Mueller, F. , Behr, R. , Weimann, T. , Palafox, L. , Olaya, D. , Dresselhaus, P. and Benz, S. (2009), 1V and 10V SNS Programmable Voltage Standards for 70 GHz, IEEE Transactions on Applied Superconductivity, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=33151 (Accessed December 26, 2024)