Ypi, Ines;
Zuppella, Paola;
Chioetto, Paolo;
Araiza-Durán, Jose A;
Barozzi, Umberto;
Barubiani, Lorenzo;
Bishop, Georgia;
... Vernani, Dervis; + view all
(2024)
Protected silver coating for Ariel telescope mirrors: study of ageing effects.
In: Navarro, Ramón and Jedamzik, Ralf, (eds.)
Proceedings of the Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI.
(pp. p. 234).
Society of Photo-Optical Instrumentation Engineers (SPIE)
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Abstract
The Atmospheric Remote-sensing Infrared Exoplanet Large-survey (Ariel), selected as ESA’s fourth mediumclass mission in the Cosmic Vision program, is set to launch in 2029. The objective of the study is to conduct spectroscopic observations of approximately one thousand exoplanetary atmospheres for better understanding the planetary system formation and evolution and identifying a clear link between the characteristics of an exoplanet and those of its parent star. The realization of the Ariel’s telescope is a challenging task that is still ongoing. It is an off-axis Cassegrain telescope (M1 parabola, M2 hyperbola) followed by a re-collimating off-axis parabola (M3) and a plane fold mirror (M4). It is made of Al 6061 and designed to operate at visible and infrared wavelengths. The mirrors of the telescope will be coated with protected silver, qualified to operate at cryogenic temperatures. The qualification of the coating was performed according to the ECSS Q-ST-70-17C standard, on a set of samples that have been stored in ISO 6 cleanroom conditions and are subjected to periodic inspection and reflectance measurements to detect any potential performance degradation. The samples consist of a set of Aluminum alloy Al 6061-T651 disks coated with protected silver. This paper presents the results of the morphological characterization of the samples based on Atomic Force Microscopy (AFM) and the reflectivity measurement in the infrared by Fourier Transform Infrared (FTIR) spectroscopy.
| Type: | Proceedings paper |
|---|---|
| Title: | Protected silver coating for Ariel telescope mirrors: study of ageing effects |
| Event: | Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI |
| Location: | Yokohama, Japan |
| Dates: | 16th-22nd June 2024 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.3017768 |
| Publisher version: | http://dx.doi.org/10.1117/12.3017768 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher's terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10197933 |
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