Measurement of reflectivity of X-ray mirror for Soft X-ray Telescope onboard ASTRO-H

被引：1

作者：

Sugita, Satoshi ^{[1
]}

Furuzawa, Akihiro ^{[2
]}

Kazunori, Ishibashi ^{[2
]}

Tamura, Keisuke ^{[2
]}

Okajima, Takashi ^{[3
]}

Maeda, Yoshitomo ^{[4
]}

Sato, Takuro ^{[4
]}

Ichihara, Kou ^{[4
]}

Tomikawa, Kazuki ^{[4
]}

Iizuka, Ryo ^{[5
]}

Awaya, Takashi ^{[5
]}

Okada, Kohta ^{[5
]}

机构：

[1] Nagoya Univ, Ecotopia Sci Inst, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan

[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[4] Inst Space & Aeronaut Sci ISAS, Japan Aerosp Explorat Agcy JASA, Kanagawa 2525210, Japan

[5] Chuo Univ, Dept Phys, Tokyo 1128551, Japan

来源：

SPACE TELESCOPES AND INSTRUMENTATION 2012: ULTRAVIOLET TO GAMMA RAY | 2012年 / 8443卷

关键词：

X-ray Optics; ASTRO-H; Soft X-ray Telescope; Refectivity;

D O I：

10.1117/12.926711

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

X-ray reflection mirror of the Soft X-ray Telescope onboard ASTRO-H was coated by gold thin layer. Gold have M-shell X-ray absorption edge around 2 keV which is included in the energy band covered with the focal plane detector such as Soft X-ray Imager and Soft X-ray Spectrometer. It is important to make response function taken int account the Au M-dege structure especially for the Soft X-ray Spectrometer because It has unprecedented high energy resolution of 5 eV from 0.3 to 12 keV. We performed the detailed measurements of of reflectivity of the mirror using reflectometer in the synchrotron radiation facility KEK PF BL-11B from Nov. 29, 2011 to Dec. 5. X-ray beam of BL-11B was monochromatized to E/deltaE of 5000 by Double crystal monochromator using Si(111). We obtained the reflectivity at the grazing incident angles of 1.0, 1.2, and 1.4 degrees. While the energy pitch was set to be 2 eV in the 2.1-4.1 keV band, the reflectivity in the 2.2-2.35 keV band was also measured in detail with the energy pitch of 0.25 eV. We report the results and optical parameters of the SXT mirror such as reflectivity, and roughness calculated from the measurements.

引用

页数：6

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