A 2ND-ORDER SQUID GRADIOMETER OPERATING AT 77-K

Authors
TAVRIN Y ZHANG Y WOLF W BRAGINSKI AI
Citation
Y. Tavrin et al., A 2ND-ORDER SQUID GRADIOMETER OPERATING AT 77-K, Superconductor science and technology, 7(5), 1994, pp. 265-268
Citations number
7
Categorie Soggetti
Physics, Applied","Physics, Condensed Matter
Journal title
Superconductor science and technology → ACNP
ISSN journal
09532048
Volume
7
Issue
5
Year of publication
1994
Pages
265 - 268
Database
ISI
SICI code
0953-2048(1994)7:5<265:A2SGOA>2.0.ZU;2-6
Abstract
We describe a portable second-order electronic SQUID gradiometer coole d with liquid nitrogen and capable of operating in unshielded space. T he measured magnetic-field resolution is <300 fT Hz-1/2 and < 170 fT H z-1/2 when operating in the first-order mode. The gradiometer was succ essfully used for the recording of screening magnetocardiograms of ove r 200 human subjects at four different geographic locations.