Referenced Items are not available for this document.
A first-order off-diagonal gradiometer was fabricated and tested. The gradiometer consisted of two field pickup coils and a planar DC SQUID (superconducting quantum interference device) with two superconducting loops connected in parallel, two multiturn input coils, and a modulation-feedback coil. The size of the pickup coils was 6×6 mm2 with a base line of 8 mm. The overall size of the gradiometer was 15×7.5 mm2. The resolution of the magnetic field gradient of the gradiometer increased from 11 to 1.8 pT/m√Hz (the noise limits), corresponding to the frequencies from 1 Hz to 600 Hz. The resolution became nearly white in a frequency range above 600 Hz. The intrinsic balance of the gradiometer was better than 1000 p.p.m. for the field perpendicular to its plane
Published in:
Magnetics, IEEE Transactions on
(Volume:25
,
Issue:
2
)
Date of Publication: Mar 1989
- Page(s):
- 1166 - 1169
- ISSN :
- 0018-9464
- INSPEC Accession Number:
- 3410372
- Digital Object Identifier :
- 10.1109/20.92497
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Mar 1989
- Sponsored by :
- IEEE Magnetics Society
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