Resilience of IRG glasses under ionizing radiations

A. Carré; J. Marro; G. Weber

doi:10.1117/12.2663905

14 June 2023 Resilience of IRG glasses under ionizing radiations

A. Carré, J. Marro, G. Weber

Proceedings Volume 12530, Advanced Optics for Imaging Applications: UV through LWIR VIII; 125300F (2023) https://doi.org/10.1117/12.2663905
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Spaceborn optics are exposed to extreme environmental conditions that may have short- and long-term effects on their performance. The periodic day/night transition over the orbit can induce strong temperature transient that may affect the optical figure due to e.g. high thermo-optic coefficients. Besides radiative heating, the ionizing radiation (high energetic e-, H+ and photons) can also damage the optics via solarization and/or compaction. Due to their low thermo-optical coefficients combined with low density, SCHOTT IRG InfraRed Glasses are a material of choice for astrospace applications. In this study we also show that these glasses are resilient to ionizing radiation. IRG 22, 24, 25, 26 and 27 chalcogenide glasses from the SCHOTT portfolio were irradiated by means of ⁶⁰Co gamma irradiation at the ESA ESTEC irradiation facility to an estimated ionizing dose of 10 kGy. The comparison of the transmittance and refractive index prior and after irradiation showed only marginal changes.

Conference Presentation

Citation Download Citation

A. Carré, J. Marro, and G. Weber "Resilience of IRG glasses under ionizing radiations", Proc. SPIE 12530, Advanced Optics for Imaging Applications: UV through LWIR VIII, 125300F (14 June 2023); https://doi.org/10.1117/12.2663905

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