Vibration isolation system for cryocoolers of soft x-ray spectrometer on-board 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 Mitsuda; Tadayuki Takahashi; Seiji Yoshida; Shoji Tsunematsu; Kenichi Kanao; Katsuhiro Narasaki; Kiyomi Otsuka; F. Scott Porter; Caroline A. Kilbourne; Meng P. Chiao; Megan E. Eckart; Gary A. Sneiderman; James T. Pontius; Dan McCammon; Paul Wilke; John Basile

doi:10.1117/1.JATIS.4.1.011216

Vibration isolation system for cryocoolers of soft x-ray spectrometer on-board 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, F. Scott Porter, Caroline A. Kilbourne, Meng P. Chiao, Megan E. Eckart, Gary A. Sneiderman, James T. Pontius, Dan McCammon, Paul Wilke, John Basile

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

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.

Original language	English
Article number	011216
Journal	Journal of Astronomical Telescopes, Instruments, and Systems
Volume	4
Issue number	1
DOIs	https://doi.org/10.1117/1.JATIS.4.1.011216
Publication status	Published - 2018 Jan 1
Externally published	Yes

Keywords

Hitomi
cryocooler
microcalorimeter
microvibration
soft x-ray spectrometer
vibration isolation

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Control and Systems Engineering
Instrumentation
Astronomy and Astrophysics
Mechanical Engineering
Space and Planetary Science

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10.1117/1.JATIS.4.1.011216

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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. (2018). Vibration isolation system for cryocoolers of soft x-ray spectrometer on-board ASTRO-H (Hitomi). Journal of Astronomical Telescopes, Instruments, and Systems, 4(1), Article 011216. https://doi.org/10.1117/1.JATIS.4.1.011216

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, NY, Sugita, H, Minesugi, K, Nakamura, Y, Mitsuda, K, Takahashi, T, Yoshida, S, Tsunematsu, S, Kanao, K, Narasaki, K, Otsuka, K, Scott Porter, F, Kilbourne, CA, Chiao, MP, Eckart, ME, Sneiderman, GA, Pontius, JT, McCammon, D, Wilke, P & Basile, J 2018, 'Vibration isolation system for cryocoolers of soft x-ray spectrometer on-board ASTRO-H (Hitomi)', Journal of Astronomical Telescopes, Instruments, and Systems, vol. 4, no. 1, 011216. https://doi.org/10.1117/1.JATIS.4.1.011216

@article{746d216e5cea42908bb1226997809882,

title = "Vibration isolation system for cryocoolers of soft x-ray spectrometer on-board ASTRO-H (Hitomi)",

abstract = "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.",

keywords = "Hitomi, cryocooler, microcalorimeter, microvibration, soft x-ray spectrometer, vibration isolation",

author = "Yoh Takei and Susumu Yasuda and Kosei Ishimura and Naoko Iwata and Atsushi Okamoto and Yoichi Sato and Mina Ogawa and Makoto Sawada and Taro Kawano and Shingo Obara and Chikara Natsukari and Atsushi Wada and Shinya Yamada and Ryuichi Fujimoto and Motohide Kokubun and Yamasaki, {Noriko Y.} and Hiroyuki Sugita and Kenji Minesugi and Yasuo Nakamura and Kazuhisa Mitsuda and Tadayuki Takahashi and Seiji Yoshida and Shoji Tsunematsu and Kenichi Kanao and Katsuhiro Narasaki and Kiyomi Otsuka and {Scott Porter}, F. and Kilbourne, {Caroline A.} and Chiao, {Meng P.} and Eckart, {Megan E.} and Sneiderman, {Gary A.} and Pontius, {James T.} and Dan McCammon and Paul Wilke and John Basile",

note = "Funding Information: The authors thank Astro-H team members and NEC for supporting the investigation for solving the SXS disturbance problem. The authors appreciate hard and challenging work of MOOG CSA members for development of the VIS, and co-operation of TAI members for GFTS development. A part of this work was supported by JSPS KAKENHI 25247028. Y.T. and M.S. thank the JSPS core-to-core program for support. The article is based on a paper previously published as SPIE conference proceedings.20 Publisher Copyright: {\textcopyright} 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.",

year = "2018",

month = jan,

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doi = "10.1117/1.JATIS.4.1.011216",

language = "English",

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journal = "Journal of Astronomical Telescopes, Instruments, and Systems",

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T1 - Vibration isolation system for cryocoolers of soft x-ray spectrometer on-board ASTRO-H (Hitomi)

AU - Takei, Yoh

AU - Yasuda, Susumu

AU - Ishimura, Kosei

AU - Iwata, Naoko

AU - Okamoto, Atsushi

AU - Sato, Yoichi

AU - Ogawa, Mina

AU - Sawada, Makoto

AU - Kawano, Taro

AU - Obara, Shingo

AU - Natsukari, Chikara

AU - Wada, Atsushi

AU - Yamada, Shinya

AU - Fujimoto, Ryuichi

AU - Kokubun, Motohide

AU - Yamasaki, Noriko Y.

AU - Sugita, Hiroyuki

AU - Minesugi, Kenji

AU - Nakamura, Yasuo

AU - Mitsuda, Kazuhisa

AU - Takahashi, Tadayuki

AU - Yoshida, Seiji

AU - Tsunematsu, Shoji

AU - Kanao, Kenichi

AU - Narasaki, Katsuhiro

AU - Otsuka, Kiyomi

AU - Scott Porter, F.

AU - Kilbourne, Caroline A.

AU - Chiao, Meng P.

AU - Eckart, Megan E.

AU - Sneiderman, Gary A.

AU - Pontius, James T.

AU - McCammon, Dan

AU - Wilke, Paul

AU - Basile, John

N1 - Funding Information: The authors thank Astro-H team members and NEC for supporting the investigation for solving the SXS disturbance problem. The authors appreciate hard and challenging work of MOOG CSA members for development of the VIS, and co-operation of TAI members for GFTS development. A part of this work was supported by JSPS KAKENHI 25247028. Y.T. and M.S. thank the JSPS core-to-core program for support. The article is based on a paper previously published as SPIE conference proceedings.20 Publisher Copyright: © 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.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - 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.

AB - 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.

KW - Hitomi

KW - cryocooler

KW - microcalorimeter

KW - microvibration

KW - soft x-ray spectrometer

KW - vibration isolation

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JO - Journal of Astronomical Telescopes, Instruments, and Systems

JF - Journal of Astronomical Telescopes, Instruments, and Systems

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ER -

Vibration isolation system for cryocoolers of soft x-ray spectrometer on-board ASTRO-H (Hitomi)

Abstract

Keywords

ASJC Scopus subject areas

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