Title :
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
fDate :
4/1/2001 12:00:00 AM
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
