Integration and test of the natural guide star wavefront sensor prototype for the Giant Magellan Telescope: the pyramid sensor

Cédric Plantet; Anne-Laure Cheffot; Simone Esposito; Nicolò Azzoroli; Fabio Rossi; Alfio Puglisi; Tommaso Lapucci; Luca Carbonaro; Enrico Pinna; Fernando Quirós-Pacheco; Antonin Bouchez; Patricio Schurter; Bo Xin; Juan-Pablo Haddad; Jordi Molgo; William Schoenell; Richard Demers; Laird Close; Sebastiaan Haffert; Maggie Kautz; Jared Males; Victor Gasho

doi:10.1117/12.3020619

27 August 2024 Integration and test of the natural guide star wavefront sensor prototype for the Giant Magellan Telescope: the pyramid sensor

Cédric Plantet, Anne-Laure Cheffot, Simone Esposito, Nicolò Azzoroli, Fabio Rossi, Alfio Puglisi, Tommaso Lapucci, Luca Carbonaro, Enrico Pinna, Fernando Quirós-Pacheco, Antonin Bouchez, Patricio Schurter, Bo Xin, Juan-Pablo Haddad, Jordi Molgo, William Schoenell, Richard Demers, Laird Close, Sebastiaan Haffert, Maggie Kautz, Jared Males, Victor Gasho

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 1309757 (2024) https://doi.org/10.1117/12.3020619
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The Giant Magellan telescope adaptive optics system will use two different diffraction-limited imaging modes. One of them is the Natural Guide Star Adaptive Optics mode (NGAO). NGAO uses a 7-segment ASM to provide wavefront correction and a single natural guide star coupled with a post focal wavefront sensor called the NGWS. The NGWS has two different channels: the main one featuring a high spatial sampling pyramid sensor dedicated to the fast frame rate correction of atmospheric turbulence and the second one featuring an Holographic Dispersed Fringe Sensor dedicated to phasing correction of the seven segments of the GMT. The Arcetri AO group, in collaboration with GMTO, designed and built a prototype of the NGWS. Arcetri AO group was in charge of providing the design, fabrication and testing of the pyramid wavefront sensor channel of the NGWS prototype that replicates all aspects of optical sensitivity including optical design, camera selection and data reduction of the final NGWS unit. The NGWS prototype was fully integrated at the University of Arizona in the High Contrast Adaptive Optics Testbed (HCAT) during summer 2023 and has been tested to demonstrate its capability to keep the segments of the GMT in phase during a high-performance AO loop. The paper focuses on the aspects of the integration and tests related to the pyramid sensor.

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

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Cédric Plantet, Anne-Laure Cheffot, Simone Esposito, Nicolò Azzoroli, Fabio Rossi, Alfio Puglisi, Tommaso Lapucci, Luca Carbonaro, Enrico Pinna, Fernando Quirós-Pacheco, Antonin Bouchez, Patricio Schurter, Bo Xin, Juan-Pablo Haddad, Jordi Molgo, William Schoenell, Richard Demers, Laird Close, Sebastiaan Haffert, Maggie Kautz, Jared Males, and Victor Gasho "Integration and test of the natural guide star wavefront sensor prototype for the Giant Magellan Telescope: the pyramid sensor", Proc. SPIE 13097, Adaptive Optics Systems IX, 1309757 (27 August 2024); https://doi.org/10.1117/12.3020619

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