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Operating Modes and Cooling Capabilities of the 3-Stage ADR Developed for the Soft-X-Ray Spectrometer Instrument on Astro-H (2015)

Sampson, Michael A. ; Porter, Frederick S. ; Sneiderman, Gary A. ; [weitere]

In: CASI

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Publikationsdatum: 2019-07-13

Beschreibung: A 3-stage adiabatic demagnetization refrigerator (ADR) is used on the Soft X-ray Spectrometer instrument on Astro-H to cool a 6x6 array of x-ray microcalorimeters to 50 mK. The ADR is supported by a cryogenic system consisting of a superfluid helium tank, a 4.5 K Joule-Thomson (JT) cryocooler, and additional 2-stage Stirling cryocoolers that pre-cool the JT cooler and cool radiation shields within the cryostat. The ADR is configured so that it can use either the liquid helium or the JT cryocooler as its heat sink, giving the instrument an unusual degree of tolerance for component failures or degradation in the cryogenic system. The flight detector assembly, ADR and dewar were integrated into the flight dewar in early 2014, and have since been extensively characterized and calibrated. This paper summarizes the operation and performance of the ADR in all of its operating modes

Schlagwort(e): Astronomy

Materialart: GSFC-E-DAA-TN27441 , Cryogenics (ISSN 0011-2275); 74; 2-9

Format: application/pdf

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Stable water isotopes measured along snow Trench T15-1 from Kohnen Station, Dronning Maud Land, Antarctica (2017)

Münch, Thomas ; Kipfstuhl, Sepp ; Freitag, Johannes ; [weitere]

PANGAEA

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Publikationsdatum: 2024-06-10

Schlagwort(e): ANT-Land_2014/15; AWI_Envi; AWI_Glac; Cavity ring-down spectroscopy (CRDS), L21301i, Picarro Inc.; CoFiAP; DEPTH, ice/snow; Deuterium excess; Distance, relative, X; Glaciology @ AWI; Kohnen Station; Polar Terrestrial Environmental Systems @ AWI; Profile ID; Sample ID; Snow height; SNOWTRE; Snow trench; T15-1; δ18O, water; δ Deuterium, water

Materialart: Dataset

Format: text/tab-separated-values, 7989 data points

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