Chioetto, Paolo;
Tozzi, Andrea;
Brucalassi, Anna;
Ferruzzi, Debora;
Caldwell, Andrew;
Caldwell, Martin;
Cortecchia, Fausto;
... Zuppella, Paola; + view all
(2022)
Preliminary analysis of ground-to-flight mechanical tolerances of the Ariel mission telescope.
In:
Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave.
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Abstract
Ariel (Atmospheric Remote-Sensing Infrared Exoplanet Large Survey) is the adopted M4 mission of ESA “Cosmic Vision” program. Its purpose is to conduct a survey of the atmospheres of known exoplanets through transit spectroscopy. Launch is scheduled for 2029. Ariel scientific payload consists of an off-axis, unobscured Cassegrain telescope feeding a set of photometers and spectrometers in the waveband between 0.5 and 7.8 μm, and operating at cryogenic temperatures. The Ariel Telescope consists of a primary parabolic mirror with an elliptical aperture of 1.1 m of major axis, followed by a hyperbolic secondary, a parabolic recollimating tertiary and a flat folding mirror directing the output beam parallel to the optical bench. The secondary mirror is mounted on a roto-translating stage for adjustments during the mission. Proper operation of the instruments prescribes a set of tolerances on the position and orientation of the telescope output beam: this needs to be verified against possible telescope misalignments as part of the ongoing Structural, Thermal, Optical and Performance Analysis. A specific part of this analysis concerns the mechanical misalignments, in terms of rigid body movements of the mirrors, that may arise after ground alignment, and how they can be compensated in flight. The purpose is to derive the mechanical constraints that can be used for the design of the opto-mechanical mounting systems of the mirrors. This paper describes the methodology and preliminary results of this analysis, and discusses future steps.
| Type: | Proceedings paper |
|---|---|
| Title: | Preliminary analysis of ground-to-flight mechanical tolerances of the Ariel mission telescope |
| Event: | Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave |
| Dates: | 17 Jul 2022 - 23 Jul 2022 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2628900 |
| Publisher version: | https://doi.org/10.1117/12.2628900 |
| 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 > 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 UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10158630 |
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