NDLI: Thermodynamic performance of the 3-stage adr for the astro-h soft x-ray spectrometer instrument

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Thermodynamic performance of the 3-stage adr for the astro-h soft x-ray spectrometer instrument

Content Provider	NASA Technical Reports Server (NTRS)
Author	James, Bryan L. Sneiderman, Gary A. Porter, Frederick S. Kelley, Richard L. DiPirro, Michael J. Bialas, Thomas G. Muench, Theodore Shirron, Peter J. Kimball, Mark O.
Copyright Year	2015
Description	The Soft X-ray Spectrometer (SXS) instrument[1] on Astro-H[2] will use a 3-stage ADR[3] to cool the microcalorimeter array to 50 mK. In the primary operating mode, two stages of the ADR cool the detectors using superfluid helium at â¤1.20 K as the heat sink[4]. In the secondary mode, which is activated when the liquid helium is depleted, the ADR uses a 4.5 K Joule-Thomson cooler as its heat sink. In this mode, all three stages operate together to continuously cool the (empty) helium tank and singleshot cool the detectors. The flight instrument - dewar, ADR, detectors and electronics - were integrated in 2014 and have since undergone extensive performance testing. This paper presents a thermodynamic analysis of the ADR's operation, including cooling capacity, heat rejection to the heat sinks, and various measures of efficiency.
File Size	694383
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20150022480
Archival Resource Key	ark:/13960/t9m37tp9s
Language	English
Publisher Date	2015-10-23
Access Restriction	Open
Subject Keyword	Adiabatic Demagnetization Refrigerator X-ray Astronomy Magnetic Refrigeration Thermal Absorption Thermodynamics Performance Tests Cryogenic Equipment Cooling Calorimeters Liquid Helium Flight Instruments Superfluidity Heat Sinks X Ray Spectrometers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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