MAVIS: preliminary design of the adaptive optics module

Valentina Viotto; Enrico Pinna; Guido Agapito; Matteo Aliverti; Carmelo Arcidiacono; Andrea Balestra; Andrea Baruffolo; Olivier Beltramo-Martin; Maria Bergomi; Marco Bonaglia; Runa Briguglio; Giulio Capasso; Luca Carbonaro; Elena Carolo; Simonetta Chinellato; Mirko Colapietro; Elia Costa; Jesse Cranney; Ciro Del Vecchio; Simone Doniselli; Sergio D'Orsi; Daniela Fantinel; Jacopo Farinato; Thierry Fusco; Antony Galla; Gaston Gausachs; Paolo Grani; Damien Gratadour; Davide Greggio; Pierre Haguenauer; Nick Herrald; Demetrio Magrin; Luca Marafatto; Benoit Neichel; Cedric Plantet; Alfio Puglisi; Kalyan Radhakrishnan; Fabio Rossi; Bernardo Salasnich; Salvatore Savarese; Pietro Schipani; Chiara Selmi; Rosanna Sordo; Stefan Ströbele; Brian Taylor; Annino Vaccarella; Daniele Vassallo; Simone Esposito; Roberto Ragazzoni; David Brodrick; Jennifer Burgess; François Rigaut

doi:10.1117/12.2629441

29 August 2022 MAVIS: preliminary design of the adaptive optics module

Valentina Viotto, Enrico Pinna, Guido Agapito, Matteo Aliverti, Carmelo Arcidiacono, Andrea Balestra, Andrea Baruffolo, Olivier Beltramo-Martin, Maria Bergomi, Marco Bonaglia, Runa Briguglio, Giulio Capasso, Luca Carbonaro, Elena Carolo, Simonetta Chinellato, Mirko Colapietro, Elia Costa, Jesse Cranney, Ciro Del Vecchio, Simone Doniselli, Sergio D'Orsi, Daniela Fantinel, Jacopo Farinato, Thierry Fusco, Antony Galla, Gaston Gausachs, Paolo Grani, Damien Gratadour, Davide Greggio, Pierre Haguenauer, Nick Herrald, Demetrio Magrin, Luca Marafatto, Benoit Neichel, Cedric Plantet, Alfio Puglisi, Kalyan Radhakrishnan, Fabio Rossi, Bernardo Salasnich, Salvatore Savarese, Pietro Schipani, Chiara Selmi, Rosanna Sordo, Stefan Ströbele, Brian Taylor, Annino Vaccarella, Daniele Vassallo, Simone Esposito, Roberto Ragazzoni, David Brodrick, Jennifer Burgess, François Rigaut

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 1218520 (2022) https://doi.org/10.1117/12.2629441
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

MAVIS will be part of the next generation of VLT instrumentation and it will include a visible imager and a spectrograph, both fed by a common Adaptive Optics Module. The AOM consists in a MCAO system, whose challenge is to provide a 30” AO-corrected FoV in the visible domain, with good performance in a 50% sky coverage at the Galactic Pole. To reach the required performance, the current AOM scheme includes the use of up to 11 reference sources at the same time (8 LGSs + 3 NGSs) to drive more than 5000 actuators, divided into 3 deformable mirrors (one of them being UT4 secondary mirror). The system also includes some auxiliary loops, that are meant to compensate for internal instabilities (including WFSs focus signal, LGS tip-tilt signal and pupil position) so to push the stability of the main AO loop and the overall performance. Here we present the Preliminary Design of the AOM, which evolved, since the previous phase, as the result of further trade-offs and optimizations. We also introduce the main calibration strategy for the loops and sub-systems, including NCPA calibration approach. Finally, we present a summary of the main results of the performance and stability analyses performed for the current design phase, in order to show compliance to the performance requirements.

Conference Presentation

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Valentina Viotto, Enrico Pinna, Guido Agapito, Matteo Aliverti, Carmelo Arcidiacono, Andrea Balestra, Andrea Baruffolo, Olivier Beltramo-Martin, Maria Bergomi, Marco Bonaglia, Runa Briguglio, Giulio Capasso, Luca Carbonaro, Elena Carolo, Simonetta Chinellato, Mirko Colapietro, Elia Costa, Jesse Cranney, Ciro Del Vecchio, Simone Doniselli, Sergio D'Orsi, Daniela Fantinel, Jacopo Farinato, Thierry Fusco, Antony Galla, Gaston Gausachs, Paolo Grani, Damien Gratadour, Davide Greggio, Pierre Haguenauer, Nick Herrald, Demetrio Magrin, Luca Marafatto, Benoit Neichel, Cedric Plantet, Alfio Puglisi, Kalyan Radhakrishnan, Fabio Rossi, Bernardo Salasnich, Salvatore Savarese, Pietro Schipani, Chiara Selmi, Rosanna Sordo, Stefan Ströbele, Brian Taylor, Annino Vaccarella, Daniele Vassallo, Simone Esposito, Roberto Ragazzoni, David Brodrick, Jennifer Burgess, and François Rigaut "MAVIS: preliminary design of the adaptive optics module", Proc. SPIE 12185, Adaptive Optics Systems VIII, 1218520 (29 August 2022); https://doi.org/10.1117/12.2629441

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