Title :
3-channel double relaxation oscillation SQUID magnetometer system with simple readout electronics
Author :
Lee, Y.H. ; Kim, J.M. ; Kwon, H.C. ; Park, Y.K. ; Park, J.C. ; Van Duuren, M.J. ; Adelerhof, D.J. ; Flokstra, J. ; Rogalla, H.
Author_Institution :
Korea Res. Inst. of Stand. & Sci., Taejon, South Korea
fDate :
6/1/1995 12:00:00 AM
Abstract :
Recently several approaches have been made to simplify the readout scheme of the standard dc SQUID. A double relaxation oscillation SQUID(DROS) consisting of a hysteretic dc SQUID and a reference junction in series shunted by an inductor and a resistor can provide a very large flux-to-voltage transfer coefficient. Thus, a DROS with direct readout with room temperature dc amplifier can be a good candidate for the next-generation SQUID magnetometer. We report on the development of a 3-channel magnetometer system based on DROS. The DROS is based on Nb/AlO/sub X//Nb Josephson junctions and the main feature of the system is its simple readout electronics.<>
Keywords :
Josephson effect; SQUID magnetometers; alumina; digital readout; niobium; relaxation oscillators; 3-channel double relaxation oscillation SQUID magnetometer system; Nb-AlO-Nb; Nb/AlO/sub X//Nb Josephson junctions; direct readout; hysteretic dc SQUID; inductor; reference junction; resistor; room temperature dc amplifier; simple readout electronics; very large flux-to-voltage transfer coefficient; Critical current; Hysteresis; Inductors; Josephson junctions; Niobium; Readout electronics; Resistors; SQUID magnetometers; Temperature; Voltage;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
