Hard x-ray telescopes to be onboard ASTRO-H

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...

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Veröffentlicht in:	Applied Optics 2014-11, Vol.53 (32), p.7664-7676
Hauptverfasser:	Awaki, Hisamitsu, Kunieda, Hideyo, Ishida, Manabu, Matsumoto, Hironori, Babazaki, Yasunori, Demoto, Tadatsugu, Furuzawa, Akihiro, Haba, Yoshito, Hayashi, Takayuki, Iizuka, Ryo, Ishibashi, Kazunori, Ishida, Naoki, Itoh, Masayuki, Iwase, Toshihiro, Kosaka, Tatsuro, Kurihara, Daichi, Kuroda, Yuuji, Maeda, Yoshitomo, Meshino, Yoshifumi, Mitsuishi, Ikuyuki, Miyata, Yuusuke, Miyazawa, Takuya, Mori, Hideyuki, Nagano, Housei, Namba, Yoshiharu, Ogasaka, Yasushi, Ogi, Keiji, Okajima, Takashi, Saji, Shigetaka, Shimasaki, Fumiya, Sato, Takuro, Sato, Toshiki, Sugita, Satoshi, Suzuki, Yoshio, Tachibana, Kenji, Tachibana, Sasagu, Takizawa, Shunya, Tamura, Keisuke, Tawara, Yuzuru, Torii, Tatsuharu, Uesugi, Kentato, Yamashita, Koujun, Yamauchi, Shigeo
Format:	Artikel
Sprache:	eng
Schlagworte:	Angular resolution Approximation Astronomy Computer-Aided Design Equipment Design Equipment Failure Analysis Foils Lenses Multilayers Reflection Spacecraft - instrumentation Synchrotron radiation Telescopes X-Ray Diffraction - instrumentation X-rays
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	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 cm at 30 keV and an angular resolution of
ISSN:	0003-6935 1559-128X 2155-3165 1539-4522
DOI:	10.1364/AO.53.007664