Hard x-ray telescopes to be onboard ASTRO-H

• Published in: Applied optics (2004) 2014-11, Vol.53 (32), p.7664-7676
• Main Authors: 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: Article
• Language: English
• Subjects: 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
• ISSN: 1559-128X; 2155-3165
• DOI: 10.1364/AO.53.007664

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