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Berlin 2008 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 15: Superconductivity: Poster Session

TT 15.40: Poster

Dienstag, 26. Februar 2008, 14:00–18:00, Poster B

Planar flip-chip HTSC DC-SQUID gradiometers for non-destructive evaluations — •Christoph Becker1, Alexander Steppke1, Uwe Schinkel1, Markus Buettner1, Veit Grosse1, Hendrik Schneidewind2, Frank Schmidl1, and Paul Seidel11Friedrich-Schiller-Universität Jena, Germany — 2Institut für Photonische Technologien e.V., Jena, Germany

For the detection of small magnetic signals, for example in applications like non-destructive evaluation DC-SQUID gradiometers are successfully used today. The low noise level of our sensors and the possibility of working in unshielded environments cannot be achieved with convential methods. The sensors made out of high-temperature superconducting thin film gradiometers are inductively coupled to a flux-transformer in a flip-chip configuration.

The field gradient resolution of the complete system is below 1 pT/(√Hz cm). In our investigations we focused on the spatial resolution of the sensors. Different approaches to characterize the resolution and methods to improve the signal to noise ratio for small magnetic sources are shown.

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DPG-Physik > DPG-Verhandlungen > 2008 > Berlin