Modelling of the coupling structure of a HTS DC SQUID amplifier

Author

Saury, L. ; Gunther, C. ; Dubuc, C.

Author_Institution

Caen Univ., France

Volume

9

Issue

1

fYear

1999

fDate

3/1/1999 12:00:00 AM

Firstpage

50

Lastpage

57

Abstract

In order to estimate self- and mutual inductances of the input coil and the pick-up loop of a YBCO SQUID amplifier operating at 77 K, a simple method based on the determination of the current and flux distributions into the superconductors is presented. The cases of inductors (single loop and spiral) and induced circuits (closed and open loop) are considered. The authors stress the difference between a SQUID pick-up loop and a directly coupled magnetometer depending upon their action on the input inductance. Finally, the coupling efficiency and the ground plane effect are calculated and measured for various patterns.

Keywords

DC amplifiers; SQUIDs; barium compounds; high-temperature superconductors; inductance; yttrium compounds; 77 K; YBCO HTS DC SQUID amplifier; YBaCuO; coupling circuit; current distribution; directly coupled magnetometer; flux distribution; ground plane; high temperature superconductor; input coil; mutual inductance; pick-up loop; self-inductance; single loop inductor; spiral inductor; Coupling circuits; Distributed amplifiers; High temperature superconductors; Inductors; SQUIDs; Spirals; Stress; Superconducting coils; Superconductivity; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.763254

Filename

763254