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Proceedings Paper

Performance of the helium dewar and cryocoolers of ASTRO-H SXS
Author(s): Ryuichi Fujimoto; Yoh Takei; Kazuhisa Mitsuda; Noriko Y. Yamasaki; Masahiro Tsujimoto; Shu Koyama; Kumi Ishikawa; Hiroyuki Sugita; Yoichi Sato; Keisuke Shinozaki; Atsushi Okamoto; Shunji Kitamoto; Akio Hoshino; Kosuke Sato; Yuichiro Ezoe; Yoshitaka Ishisaki; Shinya Yamada; Hiromi Seta; Takaya Ohashi; Toru Tamagawa; Hirofumi Noda; Makoto Sawada; Makoto Tashiro; Yoichi Yatsu; Ikuyuki Mitsuishi; Kenichi Kanao; Seiji Yoshida; Mikio Miyaoka; Shoji Tsunematsu; Kiyomi Otsuka; Katsuhiro Narasaki; Michael J. DiPirro; Peter J. Shirron; Gary A. Sneiderman; Caroline A. Kilbourne; F. Scott Porter; Meng P. Chiao; Megan E. Eckart; Richard L. Kelley
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Paper Abstract

The Soft X-ray Spectrometer (SXS) is a cryogenic high-resolution X-ray spectrometer onboard the ASTRO-H satellite, that achieves energy resolution better than 7 eV at 6 keV, by operating the detector array at 50 mK using an adiabatic demagnetization refrigerator. The cooling chain from room temperature to the ADR heat sink is composed of 2-stage Stirling cryocoolers, a 4He Joule-Thomson cryocooler, and super uid liquid He, and is installed in a dewar. It is designed to achieve a helium lifetime of more than 3 years with a minimum of 30 liters. The satellite was launched on 2016 February 17, and the SXS worked perfectly in orbit, until March 26 when the satellite lost its function. It was demonstrated that the heat load on the He tank was about 0.7 mW, which would have satisfied the lifetime requirement. This paper describes the design, results of ground performance tests, prelaunch operations, and initial operation and performance in orbit of the flight dewar and cryocoolers.

Paper Details

Date Published: 18 July 2016
PDF: 11 pages
Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99053S (18 July 2016); doi: 10.1117/12.2232933
Show Author Affiliations
Ryuichi Fujimoto, Kanazawa Univ. (Japan)
Yoh Takei, ISAS/JAXA (Japan)
Kazuhisa Mitsuda, ISAS/JAXA (Japan)
Noriko Y. Yamasaki, ISAS/JAXA (Japan)
Masahiro Tsujimoto, ISAS/JAXA (Japan)
Shu Koyama, ISAS/JAXA (Japan)
Kumi Ishikawa, ISAS/JAXA (Japan)
Hiroyuki Sugita, RDD/JAXA (Japan)
Yoichi Sato, RDD/JAXA (Japan)
Keisuke Shinozaki, RDD/JAXA (Japan)
Atsushi Okamoto, RDD/JAXA (Japan)
Shunji Kitamoto, Rikkyo Univ. (Japan)
Akio Hoshino, Rikkyo Univ. (Japan)
Kosuke Sato, Tokyo Univ. of Science (Japan)
Yuichiro Ezoe, Tokyo Metropolitan Univ. (Japan)
Yoshitaka Ishisaki, Tokyo Metropolitan Univ. (Japan)
Shinya Yamada, Tokyo Metropolitan Univ. (Japan)
Hiromi Seta, Tokyo Metropolitan Univ. (Japan)
Takaya Ohashi, Tokyo Metropolitan Univ. (Japan)
Toru Tamagawa, RIKEN (Japan)
Hirofumi Noda, Tohoku Univ. (Japan)
Makoto Sawada, Aoyama Gakuin Univ. (Japan)
Makoto Tashiro, Saitama Univ. (Japan)
Yoichi Yatsu, Tokyo Institute of Technology (Japan)
Ikuyuki Mitsuishi, Nagoya Univ. (Japan)
Kenichi Kanao, Sumitomo Heavy Industries, Ltd. (Japan)
Seiji Yoshida, Sumitomo Heavy Industries, Ltd. (Japan)
Mikio Miyaoka, Sumitomo Heavy Industries, Ltd. (Japan)
Shoji Tsunematsu, Sumitomo Heavy Industries, Ltd. (Japan)
Kiyomi Otsuka, Sumitomo Heavy Industries, Ltd. (Japan)
Katsuhiro Narasaki, Sumitomo Heavy Industries, Ltd. (Japan)
Michael J. DiPirro, NASA Goddard Space Flight Ctr. (United States)
Peter J. Shirron, NASA Goddard Space Flight Ctr. (United States)
Gary A. Sneiderman, NASA Goddard Space Flight Ctr. (United States)
Caroline A. Kilbourne, NASA Goddard Space Flight Ctr. (United States)
F. Scott Porter, NASA Goddard Space Flight Ctr. (United States)
Meng P. Chiao, NASA Goddard Space Flight Ctr. (United States)
Megan E. Eckart, NASA Goddard Space Flight Ctr. (United States)
Richard L. Kelley, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 9905:
Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Tadayuki Takahashi; Marshall Bautz, Editor(s)

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