Specifications and tolerancing for ARIEL’s aluminium primary mirror with mid-spatial-frequency errors

José A. Araiza-Durán; Paolo Chioetto; Anna Brucalassi; Andrea Tozzi; Enzo Pascale; Andrew Caldwell; Martin Caldwell; Dervis Vernani; Emanuele Pace; Antonio Scippa; Elisa Guerriero; Debora Ferruzzi; Paola Zuppella; Riccardo Lilli; Davide Bruzzi; Marina Vela Nuñez; Raffaele Piazzolla; Mario Salatti; Giampaolo Preti; Gianluca Morgante; Leonardo Tommasi

doi:10.1117/12.3019251

26 August 2024 Specifications and tolerancing for ARIEL’s aluminium primary mirror with mid-spatial-frequency errors

José A. Araiza-Durán, Paolo Chioetto, Anna Brucalassi, Andrea Tozzi, Enzo Pascale, Andrew Caldwell, Martin Caldwell, Dervis Vernani, Emanuele Pace, Antonio Scippa, Elisa Guerriero, Debora Ferruzzi, Paola Zuppella, Riccardo Lilli, Davide Bruzzi, Marina Vela Nuñez, Raffaele Piazzolla, Mario Salatti, Giampaolo Preti, Gianluca Morgante, Leonardo Tommasi

Author Affiliations +

Proceedings Volume 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI; 131003L (2024) https://doi.org/10.1117/12.3019251
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

ARIEL is ESA’s fourth medium-class mission in the Cosmic Vision program, is scheduled for launch in 2029. The telescope aims to conduct an expansive, unbiased spectroscopic survey, unraveling the complexities of exoplanet atmospheres and interiors to better comprehend the key factors influencing planetary system formation and evolution. The baseline payload features an off-axis Cassegrain telescope (M1-M2), a collimating off-axis parabola (M3), and a plane folding mirror (M4) channeling the collimated beam into two instrument modules. ARIEL’s capabilities span primary and secondary transit spectroscopy (1.10 to 7.80μm), broad-band photometry in the Optical (0.50 − 0.80μm) and Near IR (0.80 − 1.10μm) ranges, and a Fine Guidance System. This work will focus on M1, an aluminum mirror with an unobscured elliptical shape of size 1100 x 730mm. The Surface Error budget for M1 covers low and mid spatial frequencies. The work describes the manufacturing process of the mirror, the method used to quantify surface roughness, the characterization of MSF errors, and the study of the degradation of the system performance due to MSF errors.

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

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José A. Araiza-Durán, Paolo Chioetto, Anna Brucalassi, Andrea Tozzi, Enzo Pascale, Andrew Caldwell, Martin Caldwell, Dervis Vernani, Emanuele Pace, Antonio Scippa, Elisa Guerriero, Debora Ferruzzi, Paola Zuppella, Riccardo Lilli, Davide Bruzzi, Marina Vela Nuñez, Raffaele Piazzolla, Mario Salatti, Giampaolo Preti, Gianluca Morgante, and Leonardo Tommasi "Specifications and tolerancing for ARIEL’s aluminium primary mirror with mid-spatial-frequency errors", Proc. SPIE 13100, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 131003L (26 August 2024); https://doi.org/10.1117/12.3019251

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