Upgrading SPHERE with the second stage AO system SAXO+: exploration of the parameter space with end-to-end numerical simulations
Year: 2024
Type: conference-paper
Abstract: SAXO+ is the upgrade of SAXO, the adaptive optics system used by the SPHERE instrument on ESO’s Very Large Telescope. SAXO+ consists of a second stage adaptive optics downstream of the first stage, SAXO, to improve wavefront correction, achieve deeper contrast in the coronagraphic images and observe fainter and redder stars. Using the COMPASS end-to-end simulation tool, we assess the SAXO+ improved correction compared to SAXO in multiple science cases and turbulence conditions. The adaptive optics performance criterion is the starlight residual intensity in the coronagraph image: the lower the better. We show that SAXO+ improves the performance of the adaptive optics system by a factor of 10 in all simulated observing conditions. We specifically study the impact of the second stage frequency and we conclude that a 2kHz second stage is a reasonable trade-off between performance and technical constraints on the real-time system.
DOI: 10.1117/12.3018709
Authors: Charles Goulas, Raphaël Galicher, Fabrice Vidal, Johan Mazoyer, Florian Ferreira, Arnaud Sevin, Anthony Boccaletti, Eric Gendron, Clémentine Béchet, Michel Tallon, Isabelle Tallon, Maud Langlois, Magali Loupias, Eric Thiébaut, Caroline Kulcsár, Henri-François G. Raynaud, Nicolas Galland, Laura Schreiber, Emiliano Diolaiti, Isaac Bernardino Dinis, François Wildi, Gaël Chauvin, Julien Milli, David Mouillet, Markus Feldt, Markus Kasper, Miska Lelouarn, Raffaele Gratton
Institutions: Centre National de la Recherche Scientifique, Université Paris Cité, Observatoire de Paris, Laboratoire d’études spatiales et d’instrumentation en astrophysique, Lyon 1 Université, École Normale Supérieure de Lyon, Centre de Recherche Astrophysique de Lyon, Université Paris-Saclay, Laboratoire Charles Fabry, Osservatorio di Astrofisica e Scienza dello Spazio, National Institute for Astrophysics, University of Geneva, Université Côte d'Azur, Lagrange Laboratory, Observatoire de la Côte d’Azur, Institut de Planétologie et d'Astrophysique de Grenoble, Max Planck Institute for Astronomy, European Southern Observatory
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4402166253