Continuous refrigeration down to 50 mK without helium 3
EasyCool, a Lanef-funded project, aims to develop a 50 mK, 3He-free, continuous refrigerator.
EasyCool, a Lanef-funded project between Institut Néel (CNRS) and Service des Basses Températures (CEA-Grenoble), aims to develop a 50 mK continuous refrigerator based on adiabatic demagnetization of paramagnetic components as an 3He free alternative to dilution refrigerators. In its standard version, adiabatic demagnetization is a discontinuous process, alternating a heat-releasing magnetization phase and a cold production phase during demagnetization. Continuous refrigeration can however be achieved coupling a series of successive demagnetization stages, as demonstrated by P. Shirron and colleagues at Nasa/ Goddard Space Flight Center. We designed a system for laboratory use based on this principle. After manufacturing and components testing, we now work on the system optimization. The next step will be to use the system to cool and operate cryogenic sensitive detectors, providing a full validation in real life conditions.
EasyCool refrigeror at Service des Basses Températures in CEA-Grenoble.
Crédit photo : CEA-Grenoble/SBT