SQUID instruments and shielding for low-level magnetic measurements
- 1 February 1977
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 48 (2) , 702-710
- https://doi.org/10.1063/1.323659
Abstract
We have used a thick‐walled aluminum enclosure to provide low‐frequency shielding for biomagnetic studies with SQUID magnetic gradiometers. The shield provides an attenuation proportional to frequency above 1/3 Hz. A 24‐hole fractional‐turn SQUID gradiometer has been used in the enclosure to carry out studies of magnetoencephalography on humans. An ’’asymmetric’’ configuration for a second‐derivative gradiometer has been developed which provides a significant increase in sensitivity and resolution over more conventional symmetric arrays.This publication has 11 references indexed in Scilit:
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