Elisa, Guerriero;
Paolo, Chioetto;
Andrea, Tozzi;
Paola, Zuppella;
Rodolfo, Canestrari;
Anna, Brucalassi;
Marcella, Iuzzolino;
... Elisabetta, Tommasi; + view all
(2022)
Heat treatment procedure of the Aluminium 6061-T651 for the Ariel Telescope mirrors.
In: Coyle, LE and Matsuura, S and Perrin, MD, (eds.)
Proceedings of the Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave.
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Abstract
The Atmospheric Remote-Sensing Infrared Exoplanet Large Survey (Ariel) is the M4 mission adopted by ESA’s ”Cosmic Vision” program. Its launch is scheduled for 2029. The purpose of the mission is the study of exoplanetary atmospheres on a target of ∼ 1000 exoplanets. Ariel scientific payload consists of an off-axis, unobscured Cassegrain telescope. The light is directed towards a set of photometers and spectrometers with wavebands between 0.5 and 7.8 µm and operating at cryogenic temperatures. The Ariel Space Telescope consists of a primary parabolic mirror with an elliptical aperture of 1.1· 0.7 m, followed by a hyperbolic secondary, a parabolic collimating tertiary and a flat-folding mirror directing the output beam parallel to the optical bench; all in bare aluminium. The choice of bare aluminium for the realization of the mirrors is dictated by several factors: maximizing the heat exchange, reducing the costs of materials and technological advancement. To date, an aluminium mirror the size of Ariel’s primary has never been made. The greatest challenge is finding a heat treatment procedure that stabilizes the aluminium, particularly the Al6061T651 Laminated alloy. This paper describes the study and testing of the heat treatment procedure developed on aluminium samples of different sizes (from 50mm to 150mm diameter), on 0.7m diameter mirror, and discusses future steps.
| Type: | Proceedings paper |
|---|---|
| Title: | Heat treatment procedure of the Aluminium 6061-T651 for the Ariel Telescope mirrors |
| Event: | Conference on Space Telescopes and Instrumentation - Optical, Infrared, and Millimeter Wave |
| Location: | Montréal, Québec, Canada |
| Dates: | 17th-22nd July 2022 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2628178 |
| Publisher version: | https://doi.org/10.1117/12.2628178 |
| 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. |
| Keywords: | space telescope, Ariel mission, aluminium mirror, bare aluminium, Al6061T651, heat treatment, thermal cycle, laminated |
| 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-pp.ucl.ac.uk/id/eprint/10159730 |
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