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Proceedings Paper

An approach for alignment, mounting, and integration of IXO mirror segments
Author(s): Kai-Wing Chan; William Zhang; Timo Saha; David Robinson; Lawrence Olsen; Ryan McClelland; James Mazzarella; Lawrence Lozipone; John Lehan; Melinda Hong; Charles Fleetwood; Tyler Evans; Glenn Byron; Jacob Larimore
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Paper Abstract

The telescope on the International X-ray Observatory (IXO) comprises nearly 15 thousand thin glass mirror segments, each of them is capable of reflecting board-band soft x-rays at grazing angles. These mirror segments form densely packed, two-staged shells, in a Wolter type I optical design, in which each pair of the mirrors focus x-ray onto the focal plane in two reflections. The requirement in angular resolution of the IXO telescope is 5 arc-seconds. This requirement places severe challenges in forming precisely shaped mirror segments as well as in aligning and mounting these thin mirrors, which are 200 to 400 mm in size and 0.4 mm in thickness. In this paper, we will describe an approach for aligning and mounting the IXO mirror segments, in which no active adjustment is made to correct for any existing figure errors. The approach comprises processes such as suspension of a mirror under gravity to minimize gravity distortion, temporary bonding onto a strongback, alignment and transfer to a permanent structure and release of mirror from the temporary mount. Experimental results and analysis in this development are reported.

Paper Details

Date Published: 31 August 2009
PDF: 11 pages
Proc. SPIE 7437, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV, 74371D (31 August 2009); doi: 10.1117/12.825105
Show Author Affiliations
Kai-Wing Chan, Univ. of Maryland, Baltimore County (United States)
NASA Goddard Space Flight Ctr. (United States)
William Zhang, NASA Goddard Space Flight Ctr. (United States)
Timo Saha, NASA Goddard Space Flight Ctr. (United States)
David Robinson, NASA Goddard Space Flight Ctr. (United States)
Lawrence Olsen, NASA Goddard Space Flight Ctr. (United States)
Ryan McClelland, NASA/Goddard Space Flight Ctr. (United States)
SGT, Inc. (United States)
James Mazzarella, NASA/Goddard Space Flight Ctr. (United States)
SGT, Inc. (United States)
Lawrence Lozipone, NASA/Goddard Space Flight Ctr. (United States)
SGT, Inc. (United States)
John Lehan, Univ. of Maryland, Baltimore County (United States)
NASA/Goddard Space Flight Ctr. (United States)
Melinda Hong, NASA/Goddard Space Flight Ctr. (United States)
SGT, Inc. (United States)
Charles Fleetwood, NASA/Goddard Space Flight Ctr. (United States)
SGT, Inc. (United States)
Tyler Evans, NASA/Goddard Space Flight Ctr. (United States)
SGT, Inc (United States)
Glenn Byron, NASA/Goddard Space Flight Ctr. (United States)
SGT, Inc. (United States)
Jacob Larimore, Missouri Univ. of Science and Technology (United States)


Published in SPIE Proceedings Vol. 7437:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV
Stephen L. O'Dell; Giovanni Pareschi, Editor(s)

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