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20 September 2007 Development of lightweight x-ray mirrors for the Constellation-X mission
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One of the most important aspects of the Constellation-X x-ray optics development is the fabrication of lightweight mirror segments. Given its multi-faceted requirements, i.e., good angular resolution, light weight, and low production cost, we have adopted a glass slumping or forming technique that takes advantage of the naturally excellent microroughness of thin float glass sheets. In this paper we present measured quantities of formed mirror segments and compare them with requirements to show that the formed mirror segments have met all except the sag requirement. The larger than acceptable sag error may be an artifact of the measurement process. It may also be caused by coating stress or residual thermal stress resulting from the slumping process. Our immediate future task is to identify the source(s) of the sag error and address them accordingly.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
William W. Zhang, Kai-Wing Chan, Theo Hajimichael, John P. Lehan, Scott Owens, Robert Petre, Timo T. Saha, Mikhail V. Gubarev, William D. Jones, and Stephen L. O'Dell "Development of lightweight x-ray mirrors for the Constellation-X mission", Proc. SPIE 6688, Optics for EUV, X-Ray, and Gamma-Ray Astronomy III, 668811 (20 September 2007);

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