Cooling system for the soft x-ray spectrometer (SXS) onboard ASTRO-H

R Fujimoto ,Peter Shirron,Yoshitaka Ishisaki,Hiroya Yamaguchi,Atsushi Okamoto,Caroline A Kilbourne,Madoka Kawaharada,Toru Tamagawa,Yuichiro Ezoe,Hiroshi Murakami,Masahiro Tsujimoto,Akio Hoshino,Mikio Miyaoka,Shunji Kitamoto,Yoichi Sato,Kumi Ishikawa,Seiji Yoshida,Masahide Murakami,Hiroyuki Sugita,Kosuke Sato,Yoh Takei,Kenichi Kanao,Kazuhisa Mitsuda,F S Porter ,R L Kelley ,A Mattern ,Kazuo Shinozaki ,A Kashani ,Gary A Sneiderman ,Noriko Y Yamasaki ,T Ohashi ,Michael Dipirro ,John Crow ,D Mccammon

doi:10.1117/12.856909

Cooling system for the soft x-ray spectrometer (SXS) onboard ASTRO-H

R Fujimoto , Peter Shirron + Show 32 more

https://doi.org/10.1117/12.856909

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Publication Date: Jul 16, 2010

Citations: 11

Affiliation: Goddard Space Flight Center, Tokyo Metropolitan University, Nitto RIKEN (Japan), Japan Aerospace Exploration Agency, Rikkyo University, Kanazawa University, Sumitomo Heavy Industries (Japan), University of Tsukuba, Ames Research Center

#Soft X-ray Spectrometer #3-stage Adiabatic Demagnetization Refrigerator + Show 8 more

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Abstract

The Soft X-ray Spectrometer (SXS) is a cryogenic high resolution X-ray spectrometer onboard the X-ray astronomy satellite ASTRO-H. The detector array is cooled down to 50 mK using a 3-stage adiabatic demagnetization refrigerator (ADR). The cooling chain from room temperature to the ADR heat-sink is composed of superfluid liquid He, a <sup>4</sup>He Joule-Thomson cryocooler, and 2-stage Stirling cryocoolers. It is designed to keep 30 L of liquid He for more than 3 years in the nominal case. It is also designed with redundant subsystems throughout from room temperature to the ADR heat-sink, to alleviate failure of a single cryocooler or loss of liquid He.

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