Characterization of the supermirror hard-x-ray telescope for the InFOCμS balloon experiment

Takashi Okajima; Keisuke Tamura; Yasushi Ogasaka; Kazutoshi Haga; Seiji Takahashi; Satoshi Ichimaru; Hideo Kito; Shinichi Fukuda; Arifumi Goto; Kentaro Nomoto; Hiroyuki Satake; Seima Kato; Yuichi Kamata; Akihiro Furuzawa; Fumie Akimoto; Tsutomu Yoshioka; Kazumasa Kondo; Yoshito Haba; Takeshi Tanaka; Keiichi Wada; Noriyuki Hamada; Murat Hudaverdi; Yuzuru Tawara; Koujun Yamashita; Peter J. Serlemitsos; Yang Soong; Kai Wing Chan; Scott M. Owens; Fred B. Berendse; Jack Tueller; Kazutami Misaki; Ryo Shibata; Hideyuki Mori; Kei Itoh; Hideyo Kunieda; Yoshiharu Namba

doi:10.1364/AO.41.005417

Characterization of the supermirror hard-x-ray telescope for the InFOCμS balloon experiment

Takashi Okajima, Keisuke Tamura, Yasushi Ogasaka, Kazutoshi Haga, Seiji Takahashi, Satoshi Ichimaru, Hideo Kito, Shinichi Fukuda, Arifumi Goto, Kentaro Nomoto, Hiroyuki Satake, Seima Kato, Yuichi Kamata, Akihiro Furuzawa, Fumie Akimoto, Tsutomu Yoshioka, Kazumasa Kondo, Yoshito Haba, Takeshi Tanaka, Keiichi WadaNoriyuki Hamada, Murat Hudaverdi, Yuzuru Tawara, Koujun Yamashita, Peter J. Serlemitsos, Yang Soong, Kai Wing Chan, Scott M. Owens, Fred B. Berendse, Jack Tueller, Kazutami Misaki, Ryo Shibata, Hideyuki Mori, Kei Itoh, Hideyo Kunieda, Yoshiharu Namba

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

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 cm²at 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 μCrab Sensitivity balloon experiment.

Original language	English
Pages (from-to)	5417-5426
Number of pages	10
Journal	Applied Optics
Volume	41
Issue number	25
DOIs	https://doi.org/10.1364/AO.41.005417
Publication status	Published - 01-09-2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.1364/AO.41.005417

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Okajima, T., Tamura, K., Ogasaka, Y., Haga, K., Takahashi, S., Ichimaru, S., Kito, H., Fukuda, S., Goto, A., Nomoto, K., Satake, H., Kato, S., Kamata, Y., Furuzawa, A., Akimoto, F., Yoshioka, T., Kondo, K., Haba, Y., Tanaka, T., ... Namba, Y. (2002). Characterization of the supermirror hard-x-ray telescope for the InFOCμS balloon experiment. Applied Optics, 41(25), 5417-5426. https://doi.org/10.1364/AO.41.005417

@article{cfb7e4d5c3e647ffa80f582692af3cd4,

title = "Characterization of the supermirror hard-x-ray telescope for the InFOCμS 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 cm2at 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 μCrab Sensitivity balloon experiment.",

author = "Takashi Okajima and Keisuke Tamura and Yasushi Ogasaka and Kazutoshi Haga and Seiji Takahashi and Satoshi Ichimaru and Hideo Kito and Shinichi Fukuda and Arifumi Goto and Kentaro Nomoto and Hiroyuki Satake and Seima Kato and Yuichi Kamata and Akihiro Furuzawa and Fumie Akimoto and Tsutomu Yoshioka and Kazumasa Kondo and Yoshito Haba and Takeshi Tanaka and Keiichi Wada and Noriyuki Hamada and Murat Hudaverdi and Yuzuru Tawara and Koujun Yamashita and Serlemitsos, {Peter J.} and Yang Soong and Chan, {Kai Wing} and Owens, {Scott M.} and Berendse, {Fred B.} and Jack Tueller and Kazutami Misaki and Ryo Shibata and Hideyuki Mori and Kei Itoh and Hideyo Kunieda and Yoshiharu Namba",

year = "2002",

month = sep,

day = "1",

doi = "10.1364/AO.41.005417",

language = "English",

volume = "41",

pages = "5417--5426",

journal = "Applied Optics",

issn = "1559-128X",

publisher = "Optica Publishing Group",

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}

Okajima, T, Tamura, K, Ogasaka, Y, Haga, K, Takahashi, S, Ichimaru, S, Kito, H, Fukuda, S, Goto, A, Nomoto, K, Satake, H, Kato, S, Kamata, Y, Furuzawa, A, Akimoto, F, Yoshioka, T, Kondo, K, Haba, Y, Tanaka, T, Wada, K, Hamada, N, Hudaverdi, M, Tawara, Y, Yamashita, K, Serlemitsos, PJ, Soong, Y, Chan, KW, Owens, SM, Berendse, FB, Tueller, J, Misaki, K, Shibata, R, Mori, H, Itoh, K, Kunieda, H & Namba, Y 2002, 'Characterization of the supermirror hard-x-ray telescope for the InFOCμS balloon experiment', Applied Optics, vol. 41, no. 25, pp. 5417-5426. https://doi.org/10.1364/AO.41.005417

TY - JOUR

T1 - Characterization of the supermirror hard-x-ray telescope for the InFOCμS balloon experiment

AU - Okajima, Takashi

AU - Tamura, Keisuke

AU - Ogasaka, Yasushi

AU - Haga, Kazutoshi

AU - Takahashi, Seiji

AU - Ichimaru, Satoshi

AU - Kito, Hideo

AU - Fukuda, Shinichi

AU - Goto, Arifumi

AU - Nomoto, Kentaro

AU - Satake, Hiroyuki

AU - Kato, Seima

AU - Kamata, Yuichi

AU - Furuzawa, Akihiro

AU - Akimoto, Fumie

AU - Yoshioka, Tsutomu

AU - Kondo, Kazumasa

AU - Haba, Yoshito

AU - Tanaka, Takeshi

AU - Wada, Keiichi

AU - Hamada, Noriyuki

AU - Hudaverdi, Murat

AU - Tawara, Yuzuru

AU - Yamashita, Koujun

AU - Serlemitsos, Peter J.

AU - Soong, Yang

AU - Chan, Kai Wing

AU - Owens, Scott M.

AU - Berendse, Fred B.

AU - Tueller, Jack

AU - Misaki, Kazutami

AU - Shibata, Ryo

AU - Mori, Hideyuki

AU - Itoh, Kei

AU - Kunieda, Hideyo

AU - Namba, Yoshiharu

PY - 2002/9/1

Y1 - 2002/9/1

N2 - 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 cm2at 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 μCrab Sensitivity balloon experiment.

AB - 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 cm2at 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 μCrab Sensitivity balloon experiment.

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JO - Applied Optics

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ER -

Characterization of the supermirror hard-x-ray telescope for the InFOCμS balloon experiment

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