The design of a system of adjustable superconducting plates for balancing a gradiometer
Overweg, J.A. and Walter-Peters, M.J. (1978) The design of a system of adjustable superconducting plates for balancing a gradiometer. Cryogenics, 18 (9). pp. 529-534. ISSN 0011-2275
|Abstract:||The gradiometer of a SQUID-system for measuring very small biomagnetic signals should be made as insensitive as possible to the much larger uniform background fields. The balance of a gradiometer can be improved considerably by modifying the effective area of the gradiometer loops by a system of small adjustable superconducting plates.
This paper is intended as an aid for designing such a balancing system. We calculated the effective area of a gradiometer loop perpendicular to a rectangular or parallel to a circular plate. The paper contains graphs showing how large the plates have to be and where they must be placed.
The calculations show that for accurate balancing the distance of a plate to the wire of a loop must be large and that the plates must be as small as possible.
|Copyright:||© 1978 Elsevier Science|
|Link to this item:||http://purl.utwente.nl/publications/68427|
|Export this item as:||BibTeX|
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