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Proceedings Paper

IXO x-ray mirrors based on slumped glass segments with reinforcing ribs: optical and mechanical design, image error budget, and optics unit integration process
Author(s): M. Civitani; S. Basso; M. Bavdaz; O. Citterio; P. Conconi; D. Gallieni; M. Ghigo; B. Guldimann; F. Martelli; G. Pagano; G. Pareschi; G. Parodi; L. Proserpio; B. Salmaso; D. Spiga; G. Tagliaferri; M. Tintori; E. Wille; A. Zambra
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Paper Abstract

The International X-ray Observatory (IXO) is being studied as a joint mission by the NASA, ESA and JAXA space agencies. The main goals of the mission are large effective area (>3m2 at 1 keV) and a good angular resolution (<5 arcsec HEW at 1 keV). This paper reports on an activity ongoing in Europe, supported by ESA and led by the Brera Astronomical Observatory (Italy), aiming at providing an alternative method for the realization of the mirror unit assembly. This is based on the use of thin glass segments and an innovative assembly concept making use of glass reinforcing ribs that connect the facets to each-other. A fundamental challenge is the achievement with a hot slumping technique of the required surface accuracy on the glass segments. A key point of the approach is represented by the alignment of the mirror segments and co-alignment of the mirror pairs assembled together. In this paper we present the mirror assembly conceptual design, starting from the design of the optical unit, the error budgets contributing to the image degradation and the performance analysis to assess error sensitivities. Furthermore the related integration concept and the preliminary results obtained are presented.

Paper Details

Date Published: 30 July 2010
PDF: 19 pages
Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 773242 (30 July 2010); doi: 10.1117/12.857197
Show Author Affiliations
M. Civitani, Osservatorio Astronomico di Brera (Italy)
S. Basso, Osservatorio Astronomico di Brera (Italy)
M. Bavdaz, European Space Research and Technology Ctr. (Netherlands)
O. Citterio, Osservatorio Astronomico di Brera (Italy)
P. Conconi, Osservatorio Astronomico di Brera (Italy)
D. Gallieni, A.D.S. International S.r.l. (Italy)
M. Ghigo, Osservatorio Astronomico di Brera (Italy)
B. Guldimann, European Space Research and Technology Ctr. (Netherlands)
F. Martelli, BCV Progetti S.r.l. (Italy)
G. Pagano, Osservatorio Astronomico di Brera (Italy)
G. Pareschi, Osservatorio Astronomico di Brera (Italy)
G. Parodi, BCV Progetti S.r.l. (Italy)
L. Proserpio, Osservatorio Astronomico di Brera (Italy)
B. Salmaso, Osservatorio Astronomico di Brera (Italy)
D. Spiga, Osservatorio Astronomico di Brera (Italy)
G. Tagliaferri, Osservatorio Astronomico di Brera (Italy)
M. Tintori, A.D.S. International S.r.l. (Italy)
E. Wille, European Space Research and Technology Ctr. (Netherlands)
A. Zambra, Osservatorio Astronomico di Brera (Italy)


Published in SPIE Proceedings Vol. 7732:
Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray
Monique Arnaud; Stephen S. Murray; Tadayuki Takahashi, Editor(s)

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