Planar HTS gradiometers with large baseline

Planar HTS gradiometers with large baseline

We have designed an HTS single-layer planar rf double-hole gradiometer with long and well defined baseline up to 5 mm and small washer areas. We measured a gradient field resolution of about 1 pT/(cm/spl middot//spl radic/Hz) above 10 Hz in an unshielded environment. The gradiometer could be operate...

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Veröffentlicht in:IEEE transactions on applied superconductivity 1997-06, Vol.7 (2), p.2866-2869
Hauptverfasser: Zhang, Y., Soltner, H., Krause, H.-J., Sodtke, E., Zander, W., Schubert, J., Gruneklee, M., Lomparski, D., Banzet, M., Bousack, H., Braginski, A.I.
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Coils
Electronics
Exact sciences and technology
High temperature superconductors
Inductance
Intersymbol interference
Josephson junctions
Magnetic field measurement
Pulsed laser deposition
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Spatial resolution
SQUID magnetometers
Substrates
Superconducting devices
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Zusammenfassung:We have designed an HTS single-layer planar rf double-hole gradiometer with long and well defined baseline up to 5 mm and small washer areas. We measured a gradient field resolution of about 1 pT/(cm/spl middot//spl radic/Hz) above 10 Hz in an unshielded environment. The gradiometer could be operated placed on a swinging pendulum in the geomagnetic field. This permitted a simple demonstration of a movable SQUID system. We placed a SQUID system on a scanning table and performed two-dimensional eddy-current nondestructive evaluation measurements on realistic samples.
ISSN:1051-8223
1558-2515
DOI:10.1109/77.621888