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Proceedings Paper

Vibration isolation system for cryocoolers of Soft X-ray Spectrometer (SXS) onboard ASTRO-H (Hitomi)
Author(s): Yoh Takei; Susumu Yasuda; Kosei Ishimura; Naoko Iwata; Atsushi Okamoto; Yoichi Sato; Mina Ogawa; Makoto Sawada; Taro Kawano; Shingo Obara; Chikara Natsukari; Atsushi Wada; Shinya Yamada; Ryuichi Fujimoto; Motohide Kokubun; Noriko Y. Yamasaki; Hiroyuki Sugita; Kenji Minesugi; Yasuo Nakamura; Kazuhisa Mitsuda; Tadayuki Takahashi; Seiji Yoshida; Shoji Tsunematsu; Kenichi Kanao; Katsuhiro Narasaki; Kiyomi Otsuka; Richard L. Kelley; F. Scott Porter; Caroline A. Kilbourne; Meng P. Chiao; Megan E. Eckart; Gary A. Sneiderman; James T. Pontius; Dan McCammon; Paul Wilke; John Basile
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Paper Abstract

Soft X-ray Spectrometer (SXS) onboard ASTRO-H (named Hitomi after launch) is a microcalorimeter-type spectrometer, installed in a dewar to be cooled at 50 mK. The energy resolution of the SXS engineering model suffered from micro-vibration from cryocoolers mounted on the dewar. This is mitigated for the flight model by introducing vibration isolation systems between the cryocoolers and the dewar. The detector performance of the flight model was verified before launch of the spacecraft in both ambient condition and thermal-vac condition, showing no detectable degradation in energy resolution. The in-orbit performance was also consistent with that on ground, indicating that the cryocoolers were not damaged by launch environment. The design and performance of the vibration isolation system along with the mechanism of how the micro-vibration could degrade the cryogenic detector is shown.

Paper Details

Date Published: 11 July 2016
PDF: 12 pages
Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99050X (11 July 2016); doi: 10.1117/12.2231832
Show Author Affiliations
Yoh Takei, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Susumu Yasuda, Japan Aerospace Exploration Agency (Japan)
Kosei Ishimura, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Naoko Iwata, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Atsushi Okamoto, Japan Aerospace Exploration Agency (Japan)
Yoichi Sato, Japan Aerospace Exploration Agency (Japan)
Mina Ogawa, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Makoto Sawada, Aoyama Gakuin Univ. (Japan)
Taro Kawano, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Shingo Obara, Japan Aerospace Exploration Agency (Japan)
Chikara Natsukari, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Atsushi Wada, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Shinya Yamada, Tokyo Metropolitan Univ. (Japan)
Ryuichi Fujimoto, Kanazawa Univ. (Japan)
Motohide Kokubun, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Noriko Y. Yamasaki, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Hiroyuki Sugita, Japan Aerospace Exploration Agency (Japan)
Kenji Minesugi, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Yasuo Nakamura, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Kazuhisa Mitsuda, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Tadayuki Takahashi, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Seiji Yoshida, Sumitomo Heavy Industries, Ltd. (Japan)
Shoji Tsunematsu, Sumitomo Heavy Industries, Ltd. (Japan)
Kenichi Kanao, Sumitomo Heavy Industries, Ltd. (Japan)
Katsuhiro Narasaki, Sumitomo Heavy Industries, Ltd. (Japan)
Kiyomi Otsuka, Sumitomo Heavy Industries, Ltd. (Japan)
Richard L. Kelley, NASA Goddard Space Flight Ctr. (United States)
F. Scott Porter, NASA Goddard Space Flight Ctr. (United States)
Caroline A. Kilbourne, 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)
Gary A. Sneiderman, NASA Goddard Space Flight Ctr. (United States)
James T. Pontius, NASA Goddard Space Flight Ctr. (United States)
Dan McCammon, Univ. of Wisconsin, Madison (United States)
Paul Wilke, Moog CSA Engineering (United States)
John Basile, Moog CSA Engineering (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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