Protected silver coating for Ariel telescope mirrors: study of ageing effects

Ines Ypi; Paola Zuppella; Paolo Chioetto; José Antonio Araiza-Durán; Umberto Barozzi; Lorenzo Barubiani; Georgia Bishop; Pasquale Bonfà; Daniele Brienza; Anna Brucalassi; Matteo Burresi; Andrew Caldwell; Fabio D'Anca; Alexander Davidson; Lucile Desjonqueres; Marco Di Giampietro; Rachel Drummond; Paul Eccleston; Paolo Ferro; Debora Ferruzzi; Enrico Fossati; Gabriele Grisoni; Elisa Guerriero; Lucia Ianni; Lorenzo Madii Fabiani; Giuseppe Malaguti; Giuseppina Micela; Federico Miceli; Emanuele Pace; Enzo Pascale; Raffaele Piazzolla; Paolo Picchi; Carlo Pompei; Giovanni Postiglione; Giampaolo Preti; Mario Salatti; Antonio Scippa; Caroline Simpson; Giovanna Tinetti; Elisabetta Tommasi; Leonardo Tommasi; Andrea Tozzi; Dervis Vernani

doi:10.1117/12.3017768

26 August 2024 Protected silver coating for Ariel telescope mirrors: study of ageing effects

Ines Ypi, Paola Zuppella, Paolo Chioetto, José Antonio Araiza-Durán, Umberto Barozzi, Lorenzo Barubiani, Georgia Bishop, Pasquale Bonfà, Daniele Brienza, Anna Brucalassi, Matteo Burresi, Andrew Caldwell, Fabio D'Anca, Alexander Davidson, Lucile Desjonqueres, Marco Di Giampietro, Rachel Drummond, Paul Eccleston, Paolo Ferro, Debora Ferruzzi, Enrico Fossati, Gabriele Grisoni, Elisa Guerriero, Lucia Ianni, Lorenzo Madii Fabiani, Giuseppe Malaguti, Giuseppina Micela, Federico Miceli, Emanuele Pace, Enzo Pascale, Raffaele Piazzolla, Paolo Picchi, Carlo Pompei, Giovanni Postiglione, Giampaolo Preti, Mario Salatti, Antonio Scippa, Caroline Simpson, Giovanna Tinetti, Elisabetta Tommasi, Leonardo Tommasi, Andrea Tozzi, Dervis Vernani

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 1310067 (2024) https://doi.org/10.1117/12.3017768
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

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.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Ines Ypi, Paola Zuppella, Paolo Chioetto, José Antonio Araiza-Durán, Umberto Barozzi, Lorenzo Barubiani, Georgia Bishop, Pasquale Bonfà, Daniele Brienza, Anna Brucalassi, Matteo Burresi, Andrew Caldwell, Fabio D'Anca, Alexander Davidson, Lucile Desjonqueres, Marco Di Giampietro, Rachel Drummond, Paul Eccleston, Paolo Ferro, Debora Ferruzzi, Enrico Fossati, Gabriele Grisoni, Elisa Guerriero, Lucia Ianni, Lorenzo Madii Fabiani, Giuseppe Malaguti, Giuseppina Micela, Federico Miceli, Emanuele Pace, Enzo Pascale, Raffaele Piazzolla, Paolo Picchi, Carlo Pompei, Giovanni Postiglione, Giampaolo Preti, Mario Salatti, Antonio Scippa, Caroline Simpson, Giovanna Tinetti, Elisabetta Tommasi, Leonardo Tommasi, Andrea Tozzi, and Dervis Vernani "Protected silver coating for Ariel telescope mirrors: study of ageing effects", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 1310067 (26 August 2024); https://doi.org/10.1117/12.3017768

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