Title :
Toroidal DC SQUIDs with point-contact junctions
Author :
Paik, H.J. ; Mathews, R.H. ; Castellan, M.G.
Author_Institution :
University of Maryland, College Park
fDate :
1/1/1981 12:00:00 AM
Abstract :
The well-developed technique of a toroidal point-contact rf SQUID has been extended to a dc SQUID. Two point-contacts are made on the symmetry axis of the toroid. A large Nb cavity containing a signal coil is connected to the junctions via a narrow gap. Such geometry allows good coupling of the SQUID to a high-inductance signal coil without increasing the effective SQUID inductance at the Josephson frequency. It is expected that both the shot-noise-limit performance and a high signal coupling will be achieved in this SQUID. We discuss the status of design and the result of preliminary test of the device.
Keywords :
Josephson devices; Assembly; Capacitance; Conductors; Fasteners; Frequency; Helium; Neck; Niobium; Optical filters; SQUIDs;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1981.1060903
