GMagAO-X: A First Light Coronagraphic Adaptive Optics System for the GMT

Maggie Kautz; Jared Males; Laird Close; Sebastiaan Haffert; Olivier Guyon; Alexander Hedglen; Victor Gasho; Olivier Durney; Jamison Noenickx; Adam Fletcher; Fernando Coronado; John Ford; Tom Connors; Mark Sullivan; Tommy Salanski; Doug Kelly; Richard Demers; Antonin Bouchez; Breann Sitarski; Patricio Schurter

GMagAO-X: A First Light Coronagraphic Adaptive Optics System for the GMT

Maggie Kautz, Jared Males, Laird Close, Sebastiaan Haffert, Olivier Guyon, Alexander Hedglen, Victor Gasho, Olivier Durney, Jamison Noenickx, Adam Fletcher, Fernando Coronado, John Ford, Tom Connors, Mark Sullivan, Tommy Salanski, Doug Kelly, Richard Demers, Antonin Bouchez, Breann Sitarski, Patricio Schurter

Research output: Contribution to conference › Paper › peer-review

4 Scopus citations

Abstract

GMagAO-X is a visible to NIR extreme adaptive optics (ExAO) system that will be used at first light for the Giant Magellan Telescope (GMT). GMagAO-X is designed to deliver diffraction-limited performance at visible and NIR wavelengths (6 to 10 mas) and contrasts on the order of 10^-7. The primary science case of GMagAO-X will be the characterization of mature, and potentially habitable, exoplanets in reflected light. GMagAO-X employs a woofer-tweeter system and includes segment phasing control. The tweeter is a 21,000 actuator segmented deformable mirror (DM), composed of seven individual 3,000 actuator DMs. This new ExAO framework of seven DMs working in parallel to produce a 21,000 actuator DM significantly surpasses any current or near future actuator count for a monolithic DM architecture. Bootstrapping, phasing, and high order sensing are enabled by a multi-stage wavefront sensing system. GMT’s unprecedented 25.4 m aperture composed of seven segments brings a new challenge of co-phasing massive mirrors to 1/100^th of a wavelength. The primary mirror segments of the GMT are separated by large >30 cm gaps so there will be fluctuations in optical path length (piston) across the pupil due to vibration of the segments, atmospheric conditions, etc. We have developed the High Contrast Adaptive-optics Testbed (HCAT) to test new wavefront sensing and control approaches for GMT and GMagAO-X, such as the holographic dispersed fringe sensor (HDFS), and the new ExAO parallel DM concept for correcting aberrations across a segmented pupil. The CoDR for GMagAO-X was held in September 2021 and a preliminary design review is planned for early 2024. In this paper we will discuss the science cases and requirements for the overall architecture of GMagAO-X, as well as the current efforts to prototype the novel hardware components and new wavefront sensing and control concepts for GMagAO-X on HCAT.

Original language	English (US)
State	Published - 2023
Event	7th Adaptive Optics for Extremely Large Telescopes Conference, AO4ELT7 2023 - Avignon, France Duration: Jun 25 2023 → Jun 30 2023

Conference

Conference	7th Adaptive Optics for Extremely Large Telescopes Conference, AO4ELT7 2023
Country/Territory	France
City	Avignon
Period	6/25/23 → 6/30/23

Keywords

ELT
extreme adaptive optics
wavefront control

ASJC Scopus subject areas

Space and Planetary Science
Control and Systems Engineering
Mechanical Engineering
Electronic, Optical and Magnetic Materials
Astronomy and Astrophysics
Instrumentation

Cite this

Kautz, M., Males, J., Close, L., Haffert, S., Guyon, O., Hedglen, A., Gasho, V., Durney, O., Noenickx, J., Fletcher, A., Coronado, F., Ford, J., Connors, T., Sullivan, M., Salanski, T., Kelly, D., Demers, R., Bouchez, A., Sitarski, B., & Schurter, P. (2023). GMagAO-X: A First Light Coronagraphic Adaptive Optics System for the GMT. Paper presented at 7th Adaptive Optics for Extremely Large Telescopes Conference, AO4ELT7 2023, Avignon, France.

Kautz, M, Males, J, Close, L, Haffert, S, Guyon, O, Hedglen, A, Gasho, V, Durney, O, Noenickx, J, Fletcher, A, Coronado, F, Ford, J, Connors, T, Sullivan, M, Salanski, T, Kelly, D, Demers, R, Bouchez, A, Sitarski, B & Schurter, P 2023, 'GMagAO-X: A First Light Coronagraphic Adaptive Optics System for the GMT', Paper presented at 7th Adaptive Optics for Extremely Large Telescopes Conference, AO4ELT7 2023, Avignon, France, 6/25/23 - 6/30/23.

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abstract = "GMagAO-X is a visible to NIR extreme adaptive optics (ExAO) system that will be used at first light for the Giant Magellan Telescope (GMT). GMagAO-X is designed to deliver diffraction-limited performance at visible and NIR wavelengths (6 to 10 mas) and contrasts on the order of 10-7. The primary science case of GMagAO-X will be the characterization of mature, and potentially habitable, exoplanets in reflected light. GMagAO-X employs a woofer-tweeter system and includes segment phasing control. The tweeter is a 21,000 actuator segmented deformable mirror (DM), composed of seven individual 3,000 actuator DMs. This new ExAO framework of seven DMs working in parallel to produce a 21,000 actuator DM significantly surpasses any current or near future actuator count for a monolithic DM architecture. Bootstrapping, phasing, and high order sensing are enabled by a multi-stage wavefront sensing system. GMT{\textquoteright}s unprecedented 25.4 m aperture composed of seven segments brings a new challenge of co-phasing massive mirrors to 1/100th of a wavelength. The primary mirror segments of the GMT are separated by large >30 cm gaps so there will be fluctuations in optical path length (piston) across the pupil due to vibration of the segments, atmospheric conditions, etc. We have developed the High Contrast Adaptive-optics Testbed (HCAT) to test new wavefront sensing and control approaches for GMT and GMagAO-X, such as the holographic dispersed fringe sensor (HDFS), and the new ExAO parallel DM concept for correcting aberrations across a segmented pupil. The CoDR for GMagAO-X was held in September 2021 and a preliminary design review is planned for early 2024. In this paper we will discuss the science cases and requirements for the overall architecture of GMagAO-X, as well as the current efforts to prototype the novel hardware components and new wavefront sensing and control concepts for GMagAO-X on HCAT.",

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AU - Close, Laird

AU - Haffert, Sebastiaan

AU - Guyon, Olivier

AU - Hedglen, Alexander

AU - Gasho, Victor

AU - Durney, Olivier

AU - Noenickx, Jamison

AU - Fletcher, Adam

AU - Coronado, Fernando

AU - Ford, John

AU - Connors, Tom

AU - Sullivan, Mark

AU - Salanski, Tommy

AU - Kelly, Doug

AU - Demers, Richard

AU - Bouchez, Antonin

AU - Sitarski, Breann

AU - Schurter, Patricio

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GMagAO-X: A First Light Coronagraphic Adaptive Optics System for the GMT

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