Title :
DC SQUID preamplifier for DC-SQUID magnetometer
Author :
Koshelets, V.P. ; Matlashov, A.N. ; Serpuchenko, I.L. ; Filippenko, L.V. ; Zhuravlev, Y.E.
Author_Institution :
Inst. of Radio Eng. & Electron., Moscow, USSR
fDate :
3/1/1989 12:00:00 AM
Abstract :
A DC SQUID (superconducting quantum interference device) magnetometer with DC SQUID preamplifier has been designed and experimentally tested. The total magnetometer noise was reduced to the intrinsic noise level of the input DC SQUID, and magnetometer cryogenic containment was minimized by using the DC SQUID preamplifier. Two identical thin-film DC SQUIDs with 15-μm2-area resistively shunted Nb-AlOx-Nb junctions were utilized. The resulting magnetometer had a coupled energy sensitivity ≅3×10-31 J/Hz in the range from 1 Hz to 30 kHz and about 100-dB dynamic range
Keywords :
SQUIDs; aluminium compounds; electron device noise; magnetometers; niobium; 1 Hz to 30 kHz; DC SQUID preamplifier; DC-SQUID magnetometer; Nb-AlOx-Nb; coupled energy sensitivity; intrinsic noise level; magnetometer cryogenic containment; total magnetometer noise; Cryogenics; Interference; Noise level; Noise reduction; Preamplifiers; SQUID magnetometers; Superconducting device noise; Superconducting devices; Superconducting thin films; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
