The MICADO first light imager for the ELT: overview of the SCAO module at its final design

Yann Clénet (1) , Tristan Buey (1) , Eric Gendron (1) , Sonia Karkar (1) , Fabrice Vidal (1) , Mathieu Cohen (2) , Frédéric Chapron (1) , Arnaud Sevin (1) , Simone Thijs (1) , Sylvestre Taburet (2) , Bruno Borgo (1) , Jean-Michel Huet (2) , Alexandre Blin (3) , Olivier Dupuis (1) , Julien Gaudemard (2) , Florian Ferreira (1) , Jordan Raffard (1) , Fanny Chemla (2) , Vincent Lapeyrère (1) , Vincent Deo (1) , Arielle Bertrou-Cantou (1) , Nicolas Galland (1) , Sylvain Guieu , Eric Meyer (4) , Nicolas Gautherot (4) , Emmanuel Tisserand (4) , Hervé Locatelli (4) , François Meyer (4) , Amal Zidi (1) , Caroline Kulcsár (5) , Henri-François Raynaud (5) , Benoit Sassolas (6) , Laurent Pinard (6) , Christophe Michel (6) , Damien Gratadour (1) , Bertrand Le Ruyet (1) , Roderick Dembet (1) , Manuel Ortiz (1) , Claude Collin (1) , Vartan Arslanyan (1) , Bosko Doncic (1) , Lahoucine Ghouchou (1) , Issan Ibn Taïeb (1) , Pierre Baudoz (1) , Elsa Huby (1) , Gérard Rousset (1) , Sebastian Rabien , Veronika Hörmann , Eckhard Sturm , Richard Davies

1 LESIA - Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics
2 GEPI - Galaxies, Etoiles, Physique, Instrumentation
3 DTI - Division technique INSU/SDU
4 UTINAM - Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213)
5 Laboratoire Charles Fabry / Imagerie et Information
6 LMA - Laboratoire des matériaux avancés

MICADO is the ELT first light instrument, an imager working at the diffraction limit of the telescope thanks to two adaptive optics (AO) modes: a single conjugate one (SCAO), available at the instrument first light and developed by the MICADO consortium, and a multi conjugate one (MCAO), developed by the MORFEO consortium. This contribution presents an overview of the SCAO module while MICADO and its SCAO are in the last phase of their final design review. We focus on the SCAO architecture choices and present the final design of the SCAO subsystems: the Green Doughnut structure, the SCAO wavefront sensor, the SCAO calibration unit, the SCAO ICS (i.e. AOCS) and the SCAO RTC. We also present the SCAO global performance in terms of AO correction, obtained from an error budget that includes contributors estimated from AO end-to-end simulations as well as instrumental contributors. Finally, we present the current SCAO subsystems prototyping and the main milestones of the SCAO AIT plan.

Domains: Sciences of the Universe [physics]

Yann Clénet, Tristan Buey, Eric Gendron, Sonia Karkar, Fabrice Vidal, et al.. The MICADO first light imager for the ELT: overview of the SCAO module at its final design. SPIE Astronomical Telescopes + Instrumentation 2022, Adaptive Optics Systems VIII, SPIE proceedings, 12185, pp.121854S, 2022, ⟨10.1117/12.2629856⟩. ⟨obspm-04009832⟩