High-Tc SQUID systems for practical use

Author

Seidel, P. ; Schmidl, F. ; Wunderlich, S. ; Dorrer, L. ; Vogt, T. ; Schneidewind, H. ; Weidl, R. ; Losche, S. ; Leder, U. ; Solbig, O. ; Nowak, H.

Author_Institution

Inst. fur Festkorperphys., Friedrich-Schiller-Univ., Jena, Germany

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

4077

Lastpage

4080

Abstract

Planar thin film DC-SQUID gradiometers with small base length (4...6 mm) were optimized for application in different measurement systems. The field gradient noise of these planar DC-SQUID gradiometers in unshielded environment is better than 5 pT/cm/spl radic/(Hz) (at 1 Hz, 77 K). Other components of these systems like electronics, cryostats, scanning equipment, and data analysis software are discussed. An industrial system for nondestructive evaluation and a clinical system for bedside investigations on cardiac infarction are demonstrated as examples of starting cooperation between university and small companies interested in application of superconductivity.

Keywords

SQUID magnetometers; biomedical equipment; eddy current testing; high-temperature superconductors; inspection; magnetocardiography; superconducting device noise; 4 to 6 mm; 77 K; HTSC SQUID systems; MCG; bedside investigation; cardiac infarction investigation; clinical system; computer controlled table; cryostats; data analysis software; field gradient noise; industrial system; inspection; nondestructive evaluation; planar thin film DC-SQUID gradiometers; quality control; scanning equipment; unshielded environment; Application software; Biomagnetics; Cardiology; Cooling; Geometry; Hospitals; Magnetic field measurement; Magnetic sensors; SQUIDs; Transistors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783922

Filename

783922