Pre-cooling a 3He/4He dilutor module with a sealed closed-cycle continuous cooler

27th International Cryogenics Engineering Conference and International Cryogenic Materials Conference 2018

Chase, S.T.^1 ; Brien, T.L.R.^2 ; Doyle, S.M.^2 ; Kenny, L.C.^1

Chase Research Cryogenics, Cool Works, Unit 2 Neepsend Ind Est, Parkwood Road, Sheffield

S3 8AG, United Kingdom^1

School of Physics and Astronomy, Cardiff University, Cardiff

CF24 3AA, United Kingdom^2

关键词: Astronomical instrumentation;    Base temperature;    Closed cycle;    Cooling power;    Free cooling;    Load capability;    Low costs;    Pre-cooling;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/502/1/012134/pdf
DOI  :  10.1088/1757-899X/502/1/012134

来源: IOP

【 摘 要 】

A continuous closed cycle cooler to operate at a base temperature below 300 mK has been successfully designed and tested by Chase Research Cryogenics in collaboration with Cardiff University Astronomical Instrumentation Group. This compact, relatively low-cost unit has temperature and heat load capability of around 200 μW at 340 mK, and 400 μW at 450 mK. Here we discuss the suitability of this unit for precooling a miniature self-contained dilution module to produce a cryogen-free cooling platform capable of achieving a useful cooling power at temperatures of less than 100 mK.