Cooling system for the soft X-ray spectrometer onboard Astro-H

R Fujimoto ,Kazuhisa Mitsuda,Madoka Kawaharada,Yuichiro Ezoe,Jan-Willem Den Herder,Yoshitaka Ishisaki,John Crow,Peter Shirron,Yoichi Sato,Mike Dipirro,Shunji Kitamoto,Masahiro Tsujimoto,Kosuke Sato,Seiji Yoshida,Hiroyuki Sugita,Yoh Takei,Hiroya Yamaguchi,Kenichi Kanao,Toru Tamagawa,Masahide Murakami,Hiroshi Murakami,Gary A Sneiderman ,T Ohashi ,R L Kelley ,C A Kilbourne ,Noriko Y Yamasaki ,F S Porter ,D Mccammon ,A Kashani ,Kazuo Shinozaki ,A Mattern

doi:10.1016/j.cryogenics.2010.02.004

Cooling system for the soft X-ray spectrometer onboard Astro-H

R Fujimoto , Kazuhisa Mitsuda + Show 29 more

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https://doi.org/10.1016/j.cryogenics.2010.02.004

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Journal: Cryogenics	Publication Date: Feb 26, 2010
Citations: 38	License type: cc-by-nc-nd

Affiliation: Kanazawa University, Institute of Space and Astronautical Science, Nippon Soken (Japan), RIKEN, Tokyo Metropolitan University, Goddard Space Flight Center, Japan Aerospace Exploration Agency, Rikkyo University, Sumitomo Heavy Industries (Japan), University of Tsukuba, Ames Research Center

#Joule Thomson Cryocooler #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 which will be launched in 2014. The detector array is cooled down to 50 mK using an adiabatic demagnetization refrigerator (ADR). The cooling chain from the room temperature to the ADR heat-sink is composed of superfluid liquid He, a Joule–Thomson cryocooler, and double-stage Stirling cryocoolers. It is designed to keep 30 l of liquid He for more than 5 years in the normal case, and longer than 3 years even if one of the cryocoolers fails. Cryogen-free operation is also possible in the normal case. It is fully redundant from the room temperature to the ADR heat-sink.

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