DocumentCode :
1506796
Title :
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
Link To Document :
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