Josephson arrays at 70 GHz for conventional and programmable voltage standards

Author

Behr, Ralf ; Schulze, Holger ; Müller, Franz ; Kohlmann, Johannes ; Niemeyer, Jürgen

Author_Institution

Phys. Tech. Bundesanstalt, Braunschweig, Germany

Volume

48

Issue

2

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

270

Lastpage

273

Abstract

This paper describes the performance under real calibration conditions of improved conventional Nb/Al/AlO_x/Nb 10 V Josephson junction series arrays fabricated in the last two years at PTB. A new type of Nb/Al/AlO_x/Al/AlO_x/Al/Nb array is also described that is useful for programmable voltage standards in the frequency range from 70-90 GHz. A direct comparison with a conventional Josephson junction series array was carried out at 1.018 V. The results agree within an uncertainty of better than 1 nV

Keywords

Josephson effect; aluminium; aluminium compounds; calibration; measurement standards; measurement uncertainty; niobium; superconducting arrays; superconducting junction devices; superconducting microwave devices; type II superconductors; voltage measurement; 1.018 V; 10 V; 70 to 90 GHz; Josephson arrays; Josephson junction; Nb-Al-AlO-Al-AlO-Al-Nb; Nb-Al-AlO-Nb; PTB; conventional voltage standards; programmable voltage standards; real calibration conditions; uncertainty; Calibration; Frequency; Josephson junctions; Microwave antenna arrays; Niobium; Stability; Superconducting microwave devices; Testing; Uncertainty; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.769580

Filename

769580