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Integrated niobium DC SQUID gradiometers for non-destructive evaluation and biomagnetism

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Abstract

We describe the design and fabrication of thin-film Nb gradiometers with integrated DC SQUIDs for use in non-destructive evaluation (NDE) and biomagnetism. Issues of sensitivity, imbalance and field response are considered. Results are presented from eddy-current NDE in an unshielded environment of aluminium plates with sub-surface flaws, and from biomagnetic measurements of spinal and peripheral nerve evoked fields.

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References

  1. J.P. Wikswo Jr.,IEEE Trans. Appl. Supercond. 5, 2 (1995).

    Article  Google Scholar 

  2. G.B. Donaldson, M.B. Ketchen, J. Clarke, and W. Goubau,Proc. SQUID'76, de Gruyter, Berlin, p303, (1977).

    Google Scholar 

  3. M.B. Ketchen, W. Goubau, J. Clarke, and G.B. Donaldson,J. Appl. Phys. 49, 4111 (1978).

    Article  ADS  Google Scholar 

  4. G.B. Donaldson, and R.J.P. Bain,Appl. Phys. Lett 45, 990 (1984).

    Article  ADS  Google Scholar 

  5. A.E. Jones and R.J.P. Bain,J. Comput. Phys. 118, 191 (1995).

    Article  ADS  Google Scholar 

  6. U. Klein, M.E. Walker, A. Cochran, D. Hutson, G. Lang, R.G. Weston, and C.M. Pegrum,Supercond. Sci. Technol. 9 A124 (1996).

    Article  ADS  Google Scholar 

  7. D. Hutson, R.G. Weston, R.J.P. Bain, M.J. Lawrenson, C.M. Pegrum, K. Popova, and R. Scarfone,IEEE Trans. Appl. Supercond. 5, 2295 (1995).

    Article  Google Scholar 

  8. U. Klein, M.E. Walker, A. Cochran, D. Hutson, R.G. Weston, and C.M. Pegrum,Inst. Phys. Conf. Series 148, 1633 (1995).

    Google Scholar 

  9. G. Lang, D. Hutson, R.G. Weston, U. Klein, U. Shahani, A.I. Weir, P. Maas, C.M. Pegrum, and G.B. Donaldson,Proc. Int. Conf. on Biomagnetism, Santa Fe, 1996, to be published.

  10. G. Lang, D. Hutson, R.G. Weston, R.J.P. Bain, P. Maas, C.M. Pegrum, U. Shahani, A.I. Weir, and G.B. Donaldson,Inst. Phys. Conf. Series 148, 1573 (1995).

    Google Scholar 

  11. F.W. Grover,Inductance calculation, working formulas, and tables, Dover, New York, 1962.

    MATH  Google Scholar 

  12. G. Hildebrandt and F.H. Uhlmann,IEEE Trans. Appl. Supercond. 5, 2766 (1995).

    Article  Google Scholar 

  13. M.E. Walker, A. Cochran, U. Klein, R.J.P., Bain, and G.B. Donaldson,Inst. Phys. Conf. Series 148, 1573 (1995).

    Google Scholar 

  14. This 4m×4m×4m room is part of our Wellcome Biomagnetisnm Unit and is located at the Institute of Neurological Sciences, Southern General Hospital, Glasgow.

  15. A.I. Weir, U. Shahani, D. Hutson, G. Lang, P. Maas, C.M. Pegrum, and G.B. Donaldson,Proc. Int. Conf. on Biomagnetism, Santa Fe, 1996, to be published.

  16. G. Curio, S.N. Erne, J. Sandfort, J. Scheer, R. Stehr, and L. Trahms,Electroencephalography and Clin. Neurophysiol. 81, 450 (1991).

    Article  Google Scholar 

  17. A. Cochran, J.C. MacFarlane, L.N.C. Morgan, J. Kuznik, R. Weston, L. Hao, R.M. Bowman, and G.B. Donaldson,IEEE Trans. Appl. Supercond. 4, 128 (1994).

    Article  Google Scholar 

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Author notes

  1. H. Nakane

    Present address: Department of Electrical and Electronic Engineering, Muroran Institute of Technology, 27-1 Mizumoto-cho, 050, Muroran, Japan

Authors and Affiliations

  1. Department of Physics and Applied Physics, University of Strathclyde, G4 0NG, Glasgow, UK

    C. M. Pegrum, M. E. Walker, G. Lang, U. Shahani, J. R. Pedersen & H. Nakane

Authors
  1. C. M. Pegrum
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  2. M. E. Walker
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  3. G. Lang
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  4. U. Shahani
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  5. J. R. Pedersen
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  6. H. Nakane
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Pegrum, C.M., Walker, M.E., Lang, G. et al. Integrated niobium DC SQUID gradiometers for non-destructive evaluation and biomagnetism. J Low Temp Phys 106, 493–502 (1997). https://doi.org/10.1007/BF02399658

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  • DOI: https://doi.org/10.1007/BF02399658

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