Development of a cryogen-free continuous ADR system for milli-gravity experiments

Abstract

We are developing a multi-stage continuous adiabatic demagnetization refrigerator (CADR) for milli-gravity experiments, which can provide cooling at ultra low temperatures. One of the greatest features of the ADR is that it doesn't depend on gravity. The CADR is designed to provide the high cooling power, 10 μW at 50mK and 100 μW at 100mK. The CADR is planned to conduct a cooling test under the milli-gravity condition in airborne flight experiments. This paper describes the developmental status of the CADR for milli-gravity experiments. © 2008 American Institute of Physics.