10 V SINIS Josephson junction series arrays for programmable voltage standards

Author

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

Author_Institution

Phys. Tech. Bundesanstalt, Braunschweig, Germany

Volume

50

Issue

2

fYear

2001

fDate

4/1/2001 12:00:00 AM

Firstpage

192

Lastpage

194

Abstract

A programmable dc voltage standard for output voltages of up to 10 V has been realized. The series arrays, consisting of about 69120 overdamped superconductor/insulator/normal metal/insulator/superconductor (SINIS) Josephson junctions, have been fabricated using the reliable Nb-Al/Al₂O₃ technology. The arrays can be operated in conventional Josephson voltage standards at microwave frequencies from 70 GHz to 75 GHz. Steps of constant voltage are observed at very low microwave power levels, since the major part of the microwave power is generated by the junctions themselves. The operation of the arrays and the formation of Shapiro steps are discussed

Keywords

Josephson effect; measurement standards; superconducting arrays; superconducting microwave devices; voltage measurement; 10 V; 70 GHz to 75 GHz; 70 to 75 GHz; Josephson junction series arrays; Nb-Al-Al₂O₃; Nb-Al/Al₂O₃; SINIS; Shapiro steps; dc voltage standard; microwave frequencies; programmable voltage standards; series arrays; superconductor/insulator/normal metal/insulator/superconductor junctions; up to 10 V; Insulation; Josephson junctions; Metal-insulator structures; Microwave antenna arrays; Microwave frequencies; Microwave generation; Power generation; Superconducting devices; Superconducting microwave devices; Voltage;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.918099

Filename

918099