Resilience of ZERODUR glass ceramic under ionizing radiations

Antoine Carré; Rule Kirchhoff; Janina Krieg; Tony Hull; Thomas Westerhoff

doi:10.1117/12.2626863

29 August 2022 Resilience of ZERODUR glass ceramic under ionizing radiations

Antoine Carré, Rule Kirchhoff, Janina Krieg, Tony Hull, Thomas Westerhoff

Proceedings Volume 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V; 1218805 (2022) https://doi.org/10.1117/12.2626863
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

Spaceborne optical systems should ideally stay dimensionally stable under the conditions met over the orbital mission, e.g. stable under strong thermal gradients resulting from the instrument alternatively exposed to the sun then shielded by the terrestrial umbra and penumbra. In this situation, materials exhibiting a low coefficient of thermal expansion (CTE) mitigate the effect of thermal transients. However, deformations of the optics are not only due to thermal effects but can also be induced by environmental ionizing radiations resulting in compaction. Here we investigated the compaction of the glass-ceramic mirror material ZERODUR® under different types of ionizing radiations (γ, e-, H+) and for different deposited doses representative of the environment met over typical orbits. A phenomenological model binding the compaction to the estimated deposited dose based on the experimental data is proposed and compared with the data published.

Conference Presentation

Citation Download Citation

Antoine Carré, Rule Kirchhoff, Janina Krieg, Tony Hull, and Thomas Westerhoff "Resilience of ZERODUR glass ceramic under ionizing radiations", Proc. SPIE 12188, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation V, 1218805 (29 August 2022); https://doi.org/10.1117/12.2626863

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