Optimization of direct-coupled high-T(c) SQUID magnetometers for operation in magnetically unshielded environment

To further improve the design of our direct-coupled SQUID magnetometers, we performed simulations of the current distribution and thus of the effective area and inductance for various distributions of the 16 parallel 50-mum-wide loops forming the pickup structure. It is shown that an optimization of...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2001-03, Vol.11 (1), p.1315-1318
Main Authors: Ludwig, F, Jansman, A B M, Drung, D, Lindstrom, M O, Bechstein, S, Beyer, J, Flokstra, J, Schurig, T
Format: Article
Language:English
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Summary:To further improve the design of our direct-coupled SQUID magnetometers, we performed simulations of the current distribution and thus of the effective area and inductance for various distributions of the 16 parallel 50-mum-wide loops forming the pickup structure. It is shown that an optimization of the line distribution yields an increase of the effective area of only 2.2% but could be advantageous for the operation in time-varying magnetic fields. Based on the devices which were optimized with regard to their operation in magnetically unshielded environment, we have developed a single-channel second-order gradiometer system that allowed us to record real-time magnetocardiograms in a typical laboratory environment
ISSN:1051-8223
DOI:10.1109/77.919592