Title :
Application of Josephson series arrays to a DC quantum voltmeter
Author :
Behr, Ralf ; Grimm, Lambert ; Funck, Torsten ; Kohlmann, Johannes ; Schulze, Holger ; Müller, Franz ; Schumacher, Bernd ; Warnecke, Peter ; Niemeyer, Jürgen
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
fDate :
4/1/2001 12:00:00 AM
Abstract :
Josephson series arrays with a binary sequence of nonhysteretic superconductor-insulator-normal metal-insulator-superconductor (SINIS) junctions have been realized. The arrays of up to 8192 junctions (14 bits) are operated at microwave frequencies of about 70 GHz with low microwave power. An electronic system was built to drive an automated dc quantum voltmeter. Two electrically isolated quantum voltmeters (QVMs) in the same cryoprobe and driven by one frequency have been used for calibrating resistive dividers with the intention of demonstrating some advantages of these instruments
Keywords :
Josephson effect; measurement standards; resistors; superconducting junction devices; superconducting microwave devices; voltage dividers; voltage measurement; voltmeters; 70 GHz; DC quantum voltmeter; Josephson series arrays; Nb-Al-AlO; NbAlOx; SINIS; automated dc quantum voltmeter; binary sequence; cryoprobe; electrically isolated quantum voltmeters; microwave frequencies; resistive dividers; superconductor-insulator-normal metal junctions; Attenuation; Frequency; Josephson junctions; Microwave antenna arrays; Microwave generation; Microwave oscillators; Niobium; Stripline; Voltage; Voltmeters;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
