Measurements of reflectivity of x-ray mirror for Suzaku satellite

Keisuke Tamura; Yasushi Ogasaka; Masataka Naitou; Yoshitomo Maeda; Masatoshi Ebara; Akiharu Itoh; Ryo Iizuka; Yushi Yokoyama

doi:10.1117/12.671474

15 June 2006 Measurements of reflectivity of x-ray mirror for Suzaku satellite

Keisuke Tamura, Yasushi Ogasaka, Masataka Naitou, Yoshitomo Maeda, Masatoshi Ebara, Akiharu Itoh, Ryo Iizuka, Yushi Yokoyama

Author Affiliations +

Proceedings Volume 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray; 62663D (2006) https://doi.org/10.1117/12.671474
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

Detailed measurements of reflectivity of gold, which is used for X-ray mirror for X-ray telescope onboard "Suzaku" satellite was performed in the synchrotron radiation facility SPring-8 BL15XU. We measured reflectivity of the mirror, which uses total reflection of gold thin layer. Grazing incidence angle is 0.5 degree and incident X-ray monochromatized in the energy range from 2.2 keV to 3.5 keV, where M-edge structure of gold appears. We used double crystal monochrometer using Si(111) crystal, (ΔE/E ~ 10^-4) to monochromatize the incident X-ray. Energy calibration was performed using L-edge of molybdenum (2530.2 eV) and K-edge of argon (3205.9 eV). From the results, that the energy of M-V and M-IV edge of gold is different from optical constant table, and almost same as the value reported by Graessle et al.(1992).¹ It is important to study the optical constants of gold or other mirror material for X-ray astronomy. This results will be feed back to the response function of the X-ray telescope of Suzaku satellite. It is very important for X-ray spectroscopy in X-ray astronomy.

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Keisuke Tamura, Yasushi Ogasaka, Masataka Naitou, Yoshitomo Maeda, Masatoshi Ebara, Akiharu Itoh, Ryo Iizuka, and Yushi Yokoyama "Measurements of reflectivity of x-ray mirror for Suzaku satellite", Proc. SPIE 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, 62663D (15 June 2006); https://doi.org/10.1117/12.671474

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