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X-ray telescope onboard Astro-E: optical design and fabrication of thin foil mirrors.

Authors :
Kunieda H
Ishida M
Endo T
Hidaka Y
Honda H
Imamura K
Ishida J
Maeda M
Misaki K
Shibata R
Furuzawa A
Haga K
Ogasaka Y
Okajima T
Tawara Y
Terashima Y
Watanabe M
Yamashita K
Yoshioka T
Serlemitsos PJ
Soong Y
Chan KW
Source :
Applied optics [Appl Opt] 2001 Feb 01; Vol. 40 (4), pp. 553-64.
Publication Year :
2001

Abstract

X-ray telescopes (XRT's) of nested thin foil mirrors are developed for Astro-E, the fifth Japanese x-ray astronomy satellite. Although the launch was not successful, the design concept, fabrication, and alignment procedure are summarized. The main purpose of the Astro-E XRT is to collect hard x rays up to 10 keV with high efficiency and to provide medium spatial resolution in limited weight and volume. Compared with the previous mission, Advanced Satellite for Cosmology and Astrophysics (ASCA), a slightly longer focal length of 4.5-4.75 m and a larger diameter of 40 cm yields an effective area of 1750 cm2 at 8 keV with five telescopes. The image quality is also improved to 2-arc min half-power diameter by introduction of a replication process. Platinum is used instead of gold for the reflectors of one of the five telescopes to enhance the high-energy response. The fabrication and alignment procedure is also summarized. Several methods for improvement are suggested for the reflight Astro-E II mission and for other future missions. Preflight calibration results will be described in a forthcoming second paper, and a detailed study of images will be presented in a third paper.

Details

Language :
English
ISSN :
1559-128X
Volume :
40
Issue :
4
Database :
MEDLINE
Journal :
Applied optics
Publication Type :
Academic Journal
Accession number :
18357031
Full Text :
https://doi.org/10.1364/ao.40.000553