Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1507303 | Cryogenics | 2015 | 6 Pages |
Abstract
The Background Limited Infrared Submillimeter Spectrometer (BLISS) is an instrument proposed for SPICA, the Japanese-European space-borne telescope mission under study for a possible launch in the next decade. The BLISS concept is a suite of aluminum spectrometer modules totaling â¼10Â kg cooled to 50Â mK. Cooling this ambitious instrument with high-duty cycle within the stringent heat-rejection allocations envisioned for SPICA is a challenge. We have developed a solution consisting of two stages: (1) a continuous 300Â mK intercept stage provided by two 3He sorption coolers operated sequentially, and (2) a 50Â mK adiabatic demagnetization refrigerator (ADR) operated in single-shot mode. We have built a prototype cooler and demonstrated it in a dedicated SPICA-like thermal testbed with regulated stages enabling measurement of rejected heat at 1.7Â K and 4.5Â K. The approach offers lower mass than a dual-stage ADR, and lower rejected power to 1.7Â K and 4.5Â K than a comparable single-shot 300Â mK system, while insuring a high duty cycle. As a demonstration of feasibility for SPICA and future cryogenic missions, we show long-term cooling with flight-like parasitics at 50Â mK and 300Â mK requiring only 3Â mW and 8Â mW rejected at 1.7Â K and 4.5Â K, respectively.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
T. Prouvé, L. Duband, J. Hodis, J.J. Bock, C. Matt Bradford, W. Holmes,