2018年1月1日
Vibration isolation system for cryocoolers of soft x-ray spectrometer on-board ASTRO-H (Hitomi)
Journal of Astronomical Telescopes, Instruments, and Systems
- 巻
- 4
- 号
- 1
- 開始ページ
- 011216
- 終了ページ
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1117/1.JATIS.4.1.011216
© The Authors 2018. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI. The 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 microvibration from cryocoolers mounted on the dewar. This is mitigated for the flight model (FM) by introducing vibration isolation systems between the cryocoolers and the dewar. The detector performance of the FM was verified before launch of the spacecraft in both ambient condition and thermal-vacuum condition, showing no detectable degradation in energy resolution. The in-orbit detector spectral performance and cryocooler cooling performance were 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 microvibration could degrade the cryogenic detector is shown. Lessons learned from the development to mitigate unexpected issues are also described.
- リンク情報
-
- DOI
- https://doi.org/10.1117/1.JATIS.4.1.011216
- Scopus
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85042460282&origin=inward 本文へのリンクあり
- Scopus Citedby
- https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85042460282&origin=inward
- URL
- https://ui.adsabs.harvard.edu/#abs/2018JATIS...4a1216T
- ID情報
-
- DOI : 10.1117/1.JATIS.4.1.011216
- ISSN : 2329-4124
- eISSN : 2329-4221
- SCOPUS ID : 85042460282