TY - GEN
T1 - Measurement of re ectivity of X-ray mirror for soft x-ray telescope onboard ASTRO-H
AU - Sugita, Satoshi
AU - Furuzawa, Akihiro
AU - Ishibashi, Kazunori
AU - Tamura, Keisuke
AU - Okajima, Takashi
AU - Maeda, Yoshitomo
AU - Sato, Takuro
AU - Ichihara, Kou
AU - Tomikawa, Kazuki
AU - Iizuka, Ryo
AU - Awaya, Takashi
AU - Okada, Kohta
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
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U2 - 10.1117/12.926711
DO - 10.1117/12.926711
M3 - Conference contribution
AN - SCOPUS:84871739692
SN - 9780819491442
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Space Telescopes and Instrumentation 2012
T2 - Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray
Y2 - 1 July 2012 through 6 July 2012
ER -