Regensburg 2022 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 30: Poster 2
HL 30.5: Poster
Donnerstag, 8. September 2022, 11:00–13:00, P3
Sionludi - A table-top dilution refrigerator — •Viktor Adam, Alexander Zilz, and Wolfgang Wernsdorfer — KIT, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe
Dilution cryostats are the only technology that provides continuous cooling performance from room temperature down to several mK. These devices utilize the endothermic process of diluting liquid He3 into liquid He4, which occurs even at 0 K. By evaporating He3 from this mixture and returning it to the mixing chamber, the refrigerator can be operated continuously.
The Sionludi dilution refrigerator is a unique platform for low-temperature research. The table-top design combined with its small dimensions of approximately 25 cm in diameter and 50 cm in height allow for comfortable mounting of experiments and periphery to the cryostat. The key advancement of this cryostat is the fast injection line, which allows direct cooling of the dilution stage of the cryostat by the circulation of 4 K cold mixture during precooling without affecting the operation at lowest temperatures. As a result, the Sionludi features fast cool-down and warm-up times of less than 3 and 1.5 hours, respectively, while providing cooling powers of up to 200 µW at 100 mK as well as base temperatures of below 20 mK. The fast turnaround time can accelerate sample throughput and thus progress in many research applications such as quantum sensing or quantum computing.