Upgrading SPHERE with the second stage AO system SAXO+: exploration of the parameter space with end-to-end numerical simulations

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 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

doi:10.1117/12.3018709

3 September 2024 Upgrading SPHERE with the second stage AO system SAXO+: exploration of the parameter space with end-to-end numerical simulations

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 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

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 1309769 (2024) https://doi.org/10.1117/12.3018709
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

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.

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

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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 Raynaud, Nicolas Galland, Laura Schreiber, Emiliano Diolaiti, Isaac Bernardino Dinis, François Wildi, Gaël Chauvin, Julien Milli, David Mouillet, Markus Feldt, Markus Kasper, Miska Lelouarn, and Raffaele Gratton "Upgrading SPHERE with the second stage AO system SAXO+: exploration of the parameter space with end-to-end numerical simulations", Proc. SPIE 13097, Adaptive Optics Systems IX, 1309769 (3 September 2024); https://doi.org/10.1117/12.3018709

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