Performance of the helium dewar and cryocoolers of ASTRO-H SXS

Ryuichi Fujimoto; Yoh Takei; Kazuhisa Mitsuda; Noriko Y. Yamasaki; Masahiro Tsujimoto; Shu Koyama; Kumi Ishikawa; Hiroyuki Sugita; Yoichi Sato; Keisuke Shinozaki; Atsushi Okamoto; Shunji Kitamoto; Akio Hoshino; Kosuke Sato; Yuichiro Ezoe; Yoshitaka Ishisaki; Shinya Yamada; Hiromi Seta; Takaya Ohashi; Toru Tamagawa; Hirofumi Noda; Makoto Sawada; Makoto Tashiro; Yoichi Yatsu; Ikuyuki Mitsuishi; Kenichi Kanao; Seiji Yoshida; Mikio Miyaoka; Shoji Tsunematsu; Kiyomi Otsuka; Katsuhiro Narasaki; Michael J. DiPirro; Peter J. Shirron; Gary A. Sneiderman; Caroline A. Kilbourne; F. Scott Porter; Meng P. Chiao; Megan E. Eckart; Richard L. Kelley

doi:10.1117/12.2232933

18 July 2016 Performance of the helium dewar and cryocoolers of ASTRO-H SXS

Ryuichi Fujimoto, Yoh Takei, Kazuhisa Mitsuda, Noriko Y. Yamasaki, Masahiro Tsujimoto, Shu Koyama, Kumi Ishikawa, Hiroyuki Sugita, Yoichi Sato, Keisuke Shinozaki, Atsushi Okamoto, Shunji Kitamoto, Akio Hoshino, Kosuke Sato, Yuichiro Ezoe, Yoshitaka Ishisaki, Shinya Yamada, Hiromi Seta, Takaya Ohashi, Toru Tamagawa, Hirofumi Noda, Makoto Sawada, Makoto Tashiro, Yoichi Yatsu, Ikuyuki Mitsuishi, Kenichi Kanao, Seiji Yoshida, Mikio Miyaoka, Shoji Tsunematsu, Kiyomi Otsuka, Katsuhiro Narasaki, Michael J. DiPirro, Peter J. Shirron, Gary A. Sneiderman, Caroline A. Kilbourne, F. Scott Porter, Meng P. Chiao, Megan E. Eckart, Richard L. Kelley

Author Affiliations +

Proceedings Volume 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray; 99053S (2016) https://doi.org/10.1117/12.2232933
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

The Soft X-ray Spectrometer (SXS) is a cryogenic high-resolution X-ray spectrometer onboard the ASTRO-H satellite, that achieves energy resolution better than 7 eV at 6 keV, by operating the detector array at 50 mK using an adiabatic demagnetization refrigerator. The cooling chain from room temperature to the ADR heat sink is composed of 2-stage Stirling cryocoolers, a ⁴He Joule-Thomson cryocooler, and super uid liquid He, and is installed in a dewar. It is designed to achieve a helium lifetime of more than 3 years with a minimum of 30 liters. The satellite was launched on 2016 February 17, and the SXS worked perfectly in orbit, until March 26 when the satellite lost its function. It was demonstrated that the heat load on the He tank was about 0.7 mW, which would have satisfied the lifetime requirement. This paper describes the design, results of ground performance tests, prelaunch operations, and initial operation and performance in orbit of the flight dewar and cryocoolers.

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Ryuichi Fujimoto, Yoh Takei, Kazuhisa Mitsuda, Noriko Y. Yamasaki, Masahiro Tsujimoto, Shu Koyama, Kumi Ishikawa, Hiroyuki Sugita, Yoichi Sato, Keisuke Shinozaki, Atsushi Okamoto, Shunji Kitamoto, Akio Hoshino, Kosuke Sato, Yuichiro Ezoe, Yoshitaka Ishisaki, Shinya Yamada, Hiromi Seta, Takaya Ohashi, Toru Tamagawa, Hirofumi Noda, Makoto Sawada, Makoto Tashiro, Yoichi Yatsu, Ikuyuki Mitsuishi, Kenichi Kanao, Seiji Yoshida, Mikio Miyaoka, Shoji Tsunematsu, Kiyomi Otsuka, Katsuhiro Narasaki, Michael J. DiPirro, Peter J. Shirron, Gary A. Sneiderman, Caroline A. Kilbourne, F. Scott Porter, Meng P. Chiao, Megan E. Eckart, and Richard L. Kelley "Performance of the helium dewar and cryocoolers of ASTRO-H SXS", Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99053S (18 July 2016); https://doi.org/10.1117/12.2232933

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