SQUID detector with flux feedback coil sized and located to produce uniform feedback flux
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United States of America Patent
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Jun 3, 1997
Grant Date -
N/A
app pub date -
Sep 15, 1994
filing date -
Sep 15, 1993
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Abstract
A high temperature T.sub.c SQUID chip magnetometer has a flux-locked loop circuit including an independent feedback coil having an internal diameter greater than the maximum SQUID chip dimension. The feedback coil is mounted in close co-axial proximity to the SQUID chip to produce a substantially uniform feedback field over the entire area of the SQUID chip to cancel applied fields which penetrate the superconducting material.
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