Hard x-ray telescopes to be onboard ASTRO-H

Hisamitsu Awaki, Hideyo Kunieda, Manabu Ishida, Hironori Matsumoto, Yasunori Babazaki, Tadatsugu Demoto, Akihiro Furuzawa, Yoshito Haba, Takayuki Hayashi, Ryo Iizuka, Kazunori Ishibashi, Naoki Ishida, Masayuki Itoh, Toshihiro Iwase, Tatsuro Kosaka, Daichi Kurihara, Yuuji Kuroda, Yoshitomo Maeda, Yoshifumi Meshino, Ikuyuki MitsuishiYuusuke Miyata, Takuya Miyazawa, Hideyuki Mori, Housei Nagano, Yoshiharu Namba, Yasushi Ogasaka, Keiji Ogi, Takashi Okajima, Shigetaka Saji, Fumiya Shimasaki, Takuro Sato, Toshiki Sato, Satoshi Sugita, Yoshio Suzuki, Kenji Tachibana, Sasagu Tachibana, Shunya Takizawa, Keisuke Tamura, Yuzuru Tawara, Tatsuharu Torii, Kentato Uesugi, Koujun Yamashita, Shigeo Yamauchi

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

The new Japanese x-ray astronomy satellite, ASTRO-H, will carry two identical hard x-ray telescopes (HXTs), which cover the energy range of 5 to 80 keV. The HXT mirrors employ tightly nested, conically approximated thin-foil Wolter-I optics, and the mirror surfaces are coated with Pt/C depth-graded multilayers to enhance the hard x-ray effective area by means of Bragg reflection. The HXT comprises foils 120-450 mm in diameter and 200 mm in length, with a focal length of 12 m. To obtain a large effective area, 213 aluminum foils 0.2 mm in thickness are tightly nested confocally. The requirements for HXT are a total effective area of >300 cm2 at 30 keV and an angular resolution of <1.70 in halfpower diameter (HPD). Fabrication of two HXTs has been completed, and the x-ray performance of each HXT was measured at a synchrotron radiation facility, SPring-8 BL20B2 in Japan. Angular resolutions (HPD) of 1.9′ and 1.8′ at 30 keV were obtained for the full telescopes of HXT-1 and HXT-2, respectively. The total effective area of the two HXTs at 30 keV is 349 cm2.

Original languageEnglish
Pages (from-to)7664-7676
Number of pages13
JournalApplied Optics
Volume53
Issue number32
DOIs
Publication statusPublished - 10-11-2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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  • Cite this

    Awaki, H., Kunieda, H., Ishida, M., Matsumoto, H., Babazaki, Y., Demoto, T., Furuzawa, A., Haba, Y., Hayashi, T., Iizuka, R., Ishibashi, K., Ishida, N., Itoh, M., Iwase, T., Kosaka, T., Kurihara, D., Kuroda, Y., Maeda, Y., Meshino, Y., ... Yamauchi, S. (2014). Hard x-ray telescopes to be onboard ASTRO-H. Applied Optics, 53(32), 7664-7676. https://doi.org/10.1364/AO.53.007664