Adiabatic demagnetization refrigerator for space useAn Adiabatic Demagnetization Refrigerator (ADR) for space use is under development at NASA's Goddard Space Flight Center (GSFC). The breadboard ADR operated at 100 mK for 400 minutes. Some significant changes to that ADR, designed to eliminate shortcomings revealed during tests, are reported. To increase thermal contact, the ferric ammonium sulfate crystals were grown directly on gold-plated copper wires which serve as the thermal bus. The thermal link to the X-ray sensors was also markedly improved. To speed up the testing required to determine the best design parameters for the gas gap heat switch, the new heat switch has a modular design and is easy to disassemble.
Document ID
19920030785
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Serlemitsos, A. T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Warner, B. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Castles, S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Breon, S. R. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
San Sebastian, M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)