SKM 2023 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 58: Poster: Superconductivity II
TT 58.26: Poster
Donnerstag, 30. März 2023, 15:00–18:00, P2/OG3
Variable temperature probe stick with 2D coil system — •Claudia Köhn1, Sylke Bechstein2, and Doreen Wernicke3 — 1Entropy GmbH, Abbestr. 2-12, 10587 Berlin — 2PTB, Abbestr. 2-12, 10587 Berlin — 3Entropy GmbH, Gmunder Str. 37a, 81379 München
Within a technology transfer cooperation with PTB, Entropy made a probe stick for characterization of superconducting devices commercially available. It is an easy to use dip stick that can be cooled down directly in the liquid helium transport vessel while providing the possibility to vary temperature and apply magnetic fields.
The stick has two temperature stages. A 4.2 K stage and one with variable temperature (vT) stage, that can be heated up to 10 K with a temperature stability of 1 mK.
The device under test at the vT stage is placed inside a 2D coil system providing up to 500 mT parallel and 100 mT perpendicular to the chip. Homogeneity is 5% within a 1.5 mm radius around the center in the chip plane. At the moment we are optimizing the fabrication process of the coil bodies to provide better homogeneity of the magnetic field perpendicular to the chip.