title: Characterization of the supermirror hard-x-ray telescope for the InFOCmuS balloon experiment.
abstract: A hard-x-ray telescope is successfully produced for balloon observations by making use of depth-graded multilayers, or so-called supermirrors, with platinum-carbon (Pt/C) layer pairs. It consists of four quadrant units assembled in an optical configuration with a diameter of 40 cm and a focal length of 8 m. Each quadrant is made of 510 pieces of coaxially and confocally aligned supermirrors that significantly enhance the sensitivity in an energy range of 20-40 keV. The configuration of the telescope is similar to the x-ray telescope onboard Astro-E, but with a longer focal length. The reflectivity of supermirrors is of the order of 40% in the energy range concerned at a grazing angle of 0.2 deg. The effective area of a fully assembled telescope is 50 cm2 at 30 keV. The angular resolution is 2.37 arc min at half-power diameter 8.0 keV. The field of view is 12.6 arc min in the hard-x-ray region, depending somewhat on x-ray energies. We discuss these characteristics, taking into account the figure errors of reflectors and their optical alignment in the telescope assembly. This hard-x-ray telescope is unanimously afforded in the International Focusing Optics Collaboration for muCrab Sensitivity balloon experiment.
authors.affiliation: Department of Physics, Nagoya University, Japan. okajima@u.phys.nagoya-u.ac.jp
authors.forename: Takashi
authors.initials: T
authors.lastname: Okajima
authors.forename: Keisuke
authors.initials: K
authors.lastname: Tamura
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Ogasaka
authors.forename: Kazutoshi
authors.initials: K
authors.lastname: Haga
authors.forename: Seiji
authors.initials: S
authors.lastname: Takahashi
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ichimaru
authors.forename: Hideo
authors.initials: H
authors.lastname: Kito
authors.forename: Shin'ichi
authors.initials: S
authors.lastname: Fukuda
authors.forename: Arifumi
authors.initials: A
authors.lastname: Goto
authors.forename: Kentaro
authors.initials: K
authors.lastname: Nomoto
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Satake
authors.forename: Seima
authors.initials: S
authors.lastname: Kato
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Kamata
authors.forename: Akihiro
authors.initials: A
authors.lastname: Furuzawa
authors.forename: Fumie
authors.initials: F
authors.lastname: Akimoto
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Yoshioka
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Kondo
authors.forename: Yoshito
authors.initials: Y
authors.lastname: Haba
authors.forename: Takeshi
authors.initials: T
authors.lastname: Tanaka
authors.forename: Keiichi
authors.initials: K
authors.lastname: Wada
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Hamada
authors.forename: Murat
authors.initials: M
authors.lastname: Hudaverdi
authors.forename: Yuzuru
authors.initials: Y
authors.lastname: Tawara
authors.forename: Koujun
authors.initials: K
authors.lastname: Yamashita
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Serlemitsos
authors.forename: Yang
authors.initials: Y
authors.lastname: Soong
authors.forename: Kai-Wing
authors.initials: KW
authors.lastname: Chan
authors.forename: Scott M
authors.initials: SM
authors.lastname: Owens
authors.forename: Fred B
authors.initials: FB
authors.lastname: Berendse
authors.forename: Jack
authors.initials: J
authors.lastname: Tueller
authors.forename: Kazutami
authors.initials: K
authors.lastname: Misaki
authors.forename: Ryo
authors.initials: R
authors.lastname: Shibata
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Mori
authors.forename: Kei
authors.initials: K
authors.lastname: Itoh
authors.forename: Hideyo
authors.initials: H
authors.lastname: Kunieda
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Namba