Vibration isolation system for cryocoolers of Soft X-ray Spectrometer (SXS) onboard ASTRO-H (Hitomi)
| Autor: | F. Scott Porter, Shinya Yamada, Katsuhiro Narasaki, Caroline A. Kilbourne, Kenichi Kanao, Yasuo Nakamura, Shingo Obara, James Pontius, Atsushi Wada, Yoichi Sato, Chikara Natsukari, Hiroyuki Sugita, Paul Wilke, Gary A. Sneiderman, Seiji Yoshida, Kazuhisa Mitsuda, Kosei Ishimura, John Basile, Meng P. Chiao, Mina Ogawa, Naoko Iwata, Susumu Yasuda, Megan E. Eckart, Motohide Kokubun, Taro Kawano, Noriko Y. Yamasaki, Makoto Sawada, Shoji Tsunematsu, Tadayuki Takahashi, Kiyomi Otsuka, Yoh Takei, Atsushi Okamoto, Richard L. Kelley, Kenji Minesugi, Dan McCammon, Ryuichi Fujimoto |
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| Rok vydání: | 2016 |
| Předmět: |
Soft x ray
Materials science Spacecraft Spectrometer Physics::Instrumentation and Detectors business.industry Detector Astrophysics::Instrumentation and Methods for Astrophysics Orbital mechanics Cryocooler 01 natural sciences Nuclear magnetic resonance Vibration isolation Flight model 0103 physical sciences Aerospace engineering 010306 general physics business 010303 astronomy & astrophysics |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2231832 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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