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Mechanical Design of a 4-Stage ADR for the PIPER missionThe four 1,280 bolometer detector arrays that will fly on the balloon borne PIPER mission will be cooled by a 4-stage adiabatic demagnetization refrigerator (ADR). Two of the three mechanically independent ADR assemblies provide thermal isolation to their salt pills through Kevlar suspensions while the other provides thermal isolation to its salt pill through the use of bellows and Vespel material. The ADR integrates with the detector arrays and it sits in a large bucket Dewar containing superfluid liquid helium. This paper will describe the complex mechanical design of the PIPER ADR, and summarize the mechanical analysis done to validate the design.The four 1,280 bolometer detector arrays that will fly on the balloon borne PIPER mission will be cooled by a 4-stage adiabatic demagnetization refrigerator (ADR). Two of the three mechanically independent ADR assemblies provide thermal isolation to their salt pills through Kevlar suspensions while the other provides thermal isolation to its salt pill through the use of bellows and Vespel material. The ADR integrates with the detector arrays and it sits in a large bucket Dewar containing superfluid liquid helium. This paper will describe the complex mechanical design of the PIPER ADR, and summarize the mechanical analysis done to validate the design.
Document ID
20170006591
Acquisition Source
Goddard Space Flight Center
Document Type
Presentation
Authors
James, Bryan L.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Kimball, Mark O.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Shirron, Peter J.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Sampson, Michael A.
(SGT, Inc. Greenbelt, MD, United States)
Letmate, Richard V.
(Atair Aerospace Brooklyn, NY, United States)
Jackson, Michael L.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
July 17, 2017
Publication Date
July 13, 2017
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
GSFC-E-DAA-TN44289
Meeting Information
Meeting: CEC/ICMC2017 Joint Conference
Location: Madison, WI
Country: United States
Start Date: July 9, 2017
End Date: July 13, 2017
Sponsors: Cryogenic Society of America, Inc.
Funding Number(s)
CONTRACT_GRANT: NNG15CR64C
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Cryogenics
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