Note: Sub-Kelvin refrigeration with dry-coolers on a rotating system

We developed a cryogenic system on a rotating table that achieves sub-Kelvin conditions. The cryogenic system consists of a helium sorption cooler and a pulse tube cooler in a cryostat mounted on a rotating table. Two rotary-joint connectors for electricity and helium gas circulation enable the cool...

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Bibliographic Details
Published in:Review of scientific instruments 2014-08, Vol.85 (8), p.086101-086101
Main Authors: Oguri, S, Ishitsuka, H, Choi, J, Kawai, M, Tajima, O
Format: Article
Language:English
Subjects:
Connectors
Coolers
Cryogenic engineering
Cryogenic equipment
Helium
Refrigeration
Rotation
Scientific apparatus & instruments
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Summary:We developed a cryogenic system on a rotating table that achieves sub-Kelvin conditions. The cryogenic system consists of a helium sorption cooler and a pulse tube cooler in a cryostat mounted on a rotating table. Two rotary-joint connectors for electricity and helium gas circulation enable the coolers to be operated and maintained with ease. We performed cool-down tests under a condition of continuous rotation at 20 rpm. We obtained a temperature of 0.23 K with a holding time of more than 24 h, thus complying with catalog specifications. We monitored the system's performance for four weeks; two weeks with and without rotation. A few-percent difference in conditions was observed between these two states. Most applications can tolerate such a slight difference. The technology developed is useful for various scientific applications requiring sub-Kelvin conditions on rotating platforms.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4891618