| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1507782 | Cryogenics | 2012 | 6 Pages |
CEA/SBT is currently testing a 50 mK cooler developed in the framework of a European Space Agency Technological Research Program targeted for the Advanced Telescope for High Energy Astrophysics space mission. This cooler is composed of a small demagnetization refrigerator pre cooled by a sorption cooler stage. This Engineering Model is able to produce 1 μW of net heat lift at 50 mK and an additional 10 μW at 300 mK provided by the sorption cooler stage. The autonomy of the cooler is 24 h, and once the low temperature phase at 50 mK is over, it can be recycled in about 8 h with 10 μW and 100 μW available at respectively the 2.5 and 15 K heat sinks. These performances are in agreement with the European Space Agency requirements.In this paper, we present the detailed thermal performances of the cooler in nominal conditions as well as sensitivity measurements of the variation of the heat sink and the cold end temperatures.
► An Engineering Model of a 50 mK range cooler has been tested. ► It features the association of a sorption cooler and ADR stage. ► Full low temperature characterizations have been performed. ► 24 h autonomy with 1 and 100 μW heat lift at 50 and 300 mK has been measured. ► 8 h recycling has been measured.
