Gradiometer having a magnetometer which cancels background magne

Details Gradiometer having a magnetometer which cancels background magne Gradiometer having a magnetometer which cancels background magne

1990-10-09

1992-06-16

Wieder, Kenneth A.

Electricity: measuring and testing

Magnetic

Magnetometers

505846, 324244, G01R 33035

Patent

active

051227444

ABSTRACT:
A gradiometer utilizes at least three vector magnetometers (preferably SQUIDs) to measure a magnetic field gradient. The gradiometer includes a reference magnetometer and a plurality of sensor magnetometers, wherein the reference magnetometer (SQUID) used to cancel background magnetic fields from outputs of the sensor magnetometers via a feedback loop provided with a signal from the reference magnetometer. Similarly, higher order gradiometers can be built using a reference magnetometer cube and a plurality of sensor magnetometer cubes.

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