Title :
HTS SQUID gradiometer using substrate resonators operating in an unshielded environment - a portable MCG system
Author :
Zhang, Yi ; Wolters, Norbert ; Schubert, Jürgen ; Lomparski, Dieter ; Banzet, Marko ; Panaitov, Grigory ; Krause, Hans-Joachim ; Mück, Michael ; Braginski, Alex I.
Author_Institution :
Inst. of Thin Films & Interfaces, Forschungszentrum Julich GmbH, Germany
fDate :
6/1/2003 12:00:00 AM
Abstract :
We have demonstrated and verified the basic feasibility of performing magnetocardiographic (MCG) measurements without magnetic shielding when using a first-order electronic gradiometer with our novel dielectric substrate resonator rf SQUIDs. The setup at the operation site involved adjustment of the gradiometer´s baseline length and adaptive balancing. Our experimental portable system was tested in three environments differing in the level of electromagnetic interference.
Keywords :
SQUID magnetometers; dielectric resonators; electromagnetic interference; high-temperature superconductors; magnetocardiography; portable instruments; HTS SQUID gradiometer; RF SQUID; dielectric substrate resonator; electromagnetic interference; first-order electronic gradiometer; portable MCG system; unshielded environment; Circuits; Dielectric measurements; Dielectric substrates; Electromagnetic measurements; High temperature superconductors; Instruments; Magnetic shielding; Performance evaluation; SQUID magnetometers; Testing;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2003.813864
