%0 Conference Paper
%A Faley, M.I.
%A Poppe, U.
%A Dunin-Borkowski, R.E
%A Schiek, M.
%A Boers, F.
%A Chocholacs, H.
%A Dammers, J.
%A Eich, E.
%A Shah, N.
%A Ermakov, A.
%A Slobodchikov, V.
%A Maslennikov, Y.
%A Koshelets, V.
%T High-Tc DC SQUIDs for magnetoencephalography
%C New York, NY
%I IEEE
%M FZJ-2012-00802
%D 2012
%X We have investigated the microstructural and electron transport properties of 45° step-edge Josephson junctions grown on MgO substrates and used them for the preparation of superconducting quantum interference device (SQUID) magnetometers intended for magnetoencephalography (MEG) measurement systems. The high-Tc SQUID magnetometers also incorporate 16 mm multilayer superconducting flux transformers on the MgO substrates and demonstrate a magnetic field resolution of ~ 4 fT/√Hz at 77 K. Results are illustrated for the detection of auditory evoked magnetic responses of the human cortex and compared between high-Tc SQUIDs and a commercial low-Tc MEG system. Our results demonstrate that MEG systems can be upgraded using high-Tc SQUIDs to make them independent of helium and more user-friendly, saving operating costs and leading to the widespread utilization of MEG systems in clinical practice and at universities.
%B The Applied Superconductivity Conference
%C 7 Oct 2012 - 12 Oct 2012, Portland (Oregon)
Y2 7 Oct 2012 - 12 Oct 2012
M2 Portland, Oregon
%F PUB:(DE-HGF)8
%9 Contribution to a conference proceedings
%U https://juser.fz-juelich.de/record/127851