Design study for supporting of thin glass optical elements for x-ray telescopes

Details Design study for supporting of thin glass optical elements for x-ray telescopes Design study for supporting of thin glass optical elements for x-ray telescopes

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008spie.7011e..32f&link_type=abstract

Space Telescopes and Instrumentation 2008: Ultraviolet to Gamma Ray. Edited by Turner, Martin J. L.; Flanagan, Kathryn A. Pr

Astronomy and Astrophysics

Astrophysics

Scientific paper

The next large x-ray astrophysics mission launched will likely include soft x-ray spectroscopy as a primary capability. A requirement to fulfill the science goals of such a mission is a large-area x-ray telescope focusing sufficient x-ray flux to perform high-resolution spectroscopy with reasonable observing times. One approach to manufacturing such a telescope is a Wolter-I optic utilizing thin glass segments rather than full shells of revolution. We describe a parameterized Finite Element Modeling (FEM) study that provides insights useful in optimizing the design of a discrete support system to balance the competing requirements of minimizing the effect on optical performance while providing sufficient support to withstand launch loads. Parameters analyzed are number and location of the supports around the glass segments, as well as the glass thickness, size, and angular span. In addition, we utilize more detailed models of several cases taken from the parametric study to examine stress around the bonded area and bond pad size, and compare the stress from the detailed model to the parametric cases from which they were derived.

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