Vibration isolation system for cryocoolers of Soft X-ray Spectrometer (SXS) onboard ASTRO-H (Hitomi)

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 MitsudaTadayuki 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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

15 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationSpace Telescopes and Instrumentation 2016
Subtitle of host publicationUltraviolet to Gamma Ray
PublisherSPIE
Volume9905
ISBN (Electronic)9781510601895
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes
EventSpace Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray - Edinburgh, United Kingdom
Duration: 2016 Jun 262016 Jul 1

Other

OtherSpace Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
CountryUnited Kingdom
CityEdinburgh
Period16/6/2616/7/1

Keywords

  • ASTRO-H
  • Cryocooler
  • Hitomi
  • Microcalorimeter
  • microvibration
  • SXS
  • vibration isolation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Takei, Y., Yasuda, S., Ishimura, K., Iwata, N., Okamoto, A., Sato, Y., Ogawa, M., Sawada, M., Kawano, T., Obara, S., Natsukari, C., Wada, A., Yamada, S., Fujimoto, R., Kokubun, M., Yamasaki, N. Y., Sugita, H., Minesugi, K., Nakamura, Y., ... Basile, J. (2016). Vibration isolation system for cryocoolers of Soft X-ray Spectrometer (SXS) onboard ASTRO-H (Hitomi). In Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray (Vol. 9905). [99050X] SPIE. https://doi.org/10.1117/12.2231832