Thin fused silica shells for high-resolution and large collecting area x-ray telescopes (like Lynx/XRS)
Date Issued
2017
Author(s)
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Hołyszko, J.
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Citterio, O.
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Parodi, G.
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Abstract
The implementation of an X-ray mission with high imaging capabilities, similar to those achieved with Chandra (< 1 arc second Half Energy Width, HEW), but with a much larger throughput (2.5 m2 effective area @1 keV), represents a compelling request by the scientific community. To this end the Lynx/XRS mission is being studied in USA, with the participation of international partners. In order to figure out the challenging technological task of the mirror fabrication, different approaches are considered, based on monolithic and segmented shells. Starting from the experience done on the glass prototypal shell realized in the past years, the direct polishing of thin (2 mm thick) fused silica monolithic shells is being investigated as a possible solution. A temporary stiffening structure is designed to support the shell during the figuring and polishing operations and to manage the handling up to its integration in the telescope structure. After the grinding and the polishing phases, in order to achieve the required surface accuracy, a final ion beam figuring correction is foreseen. In this paper, we present the technological process and the results achieved so far on a prototypal shell under development.
Coverage
Optics for EUV, X-Ray, and Gamma-Ray Astronomy VIII
All editors
O'Dell, Stephen; Pareschi, Giovanni
Series
Volume
10399
Start page
103990W
Conferenece
Optics for EUV, X-Ray, and Gamma-Ray Astronomy VIII
Conferenece place
San Diego, California, United States
Conferenece date
6-10 agosto, 2017
Issn Identifier
0277-786X
Ads BibCode
2017SPIE10399E..0WC
Rights
open.access
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