Coating stress analysis and compensation for iridium-based x-ray mirrors
- Iridium-based coatings for mirrors of x-ray telescopes are studied. In particular, stress-induced deformation is characterized and shown to be compressive and equal to −1786 MPa. Two methods for stress compensation are then studied. One relies on the deposition of silica on the back surface of the substrate and a second one relies on the deposition of a chromium sublayer. Advantages and drawbacks of each of these techniques are presented.
Author: | Anne-Catherine Probst, Thomas Begou, Thorsten DöhringORCiD, Sebastian Zeising, Manfred StollenwerkORCiD, Johannes Stadtmüller, Florian Emmerich, Julien Lumeau |
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URL: | https://doi.org/10.1364/AO.57.008775 |
Parent Title (English): | Applied Optics |
Editor: | Publishing OSA |
Document Type: | Article |
Language: | English |
Year of Completion: | 2018 |
Date of first Publication: | 2018/10/10 |
Embargo Date: | 2018/10/10 |
Release Date: | 2018/10/09 |
Tag: | X-ray; astronomy; coating stress; iridium; mirror |
GND Keyword: | Röntgenteleskop; Iridium; Spiegelteleskop |
Volume: | 2018 |
Issue: | 57 (29) |
First Page: | 8775 |
Last Page: | 8779 |
Urheberrecht: | 1 |
research focus : | Materials / Innovative Material Processing |
Materials / Material Testing & Sensor Technology | |
Licence (German): | Keine Lizenz - es gilt das deutsche Urheberrecht |