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Proceedings Paper

The challenge of developing thin mirror shells for future x-ray telescopes
Author(s): Thorsten Döhring; Manfred Stollenwerk; Qingqing Gong; Laura Proserpio; Anita Winter; Peter Friedrich
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Paper Abstract

Previously used mirror technologies are not able to fulfil the requirements of future X-ray telescopes due to challenging requests from the scientific community. Consequently new technical approaches for X-ray mirror production are under development. In Europe the technical baseline for the planned X-ray observatory ATHENA is the radical new approach of silicon pore optics. NASA´s recently launched NuSTAR mission uses segmented mirrors shells made from thin bended glasses, successfully demonstrating the feasibility of the glass forming technology for X-ray mirrors. For risk mitigation also in Europe the hot slumping of thin glasses is being developed as an alternative technology for lightweight X-ray telescopes. The high precision mirror manufacturing requires challenging technical developments; several design trades and trend-setting decisions need to be made and are discussed within this paper. Some new technical and economic aspects of the intended glass mirror serial production are also studied within the recently started interdisciplinary project INTRAAST, an acronym for "industry transfer of astronomical mirror technologies". The goal of the project, embedded in a cooperation of the Max-Planck-Institute for extraterrestrial Physics and the University of Applied Sciences Aschaffenburg, is to master the challenge of producing thin mirror shells for future X-ray telescopes. As a first project task the development of low stress coatings for thin glass mirror substrates have been started, the corresponding technical approach and first results are presented.

Paper Details

Date Published: 24 September 2015
PDF: 8 pages
Proc. SPIE 9628, Optical Systems Design 2015: Optical Fabrication, Testing, and Metrology V, 962809 (24 September 2015); doi: 10.1117/12.2191112
Show Author Affiliations
Thorsten Döhring, Hochschule Aschaffenburg (Germany)
Manfred Stollenwerk, Hochschule Aschaffenburg (Germany)
Qingqing Gong, Hochschule Aschaffenburg (Germany)
Laura Proserpio, Max-Planck-Institut für extraterrestrische Physik (Germany)
Anita Winter, Max-Planck-Institut für extraterrestrische Physik (Germany)
Peter Friedrich, Max-Planck-Institut für extraterrestrische Physik (Germany)

Published in SPIE Proceedings Vol. 9628:
Optical Systems Design 2015: Optical Fabrication, Testing, and Metrology V
Angela Duparré; Roland Geyl, Editor(s)

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