Phasing the segmented Giant Magellan Telescope: progress in testbeds and prototypes

Date Issued
2022
Author(s)
Demers, Richard
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Bouchez, Antonin
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Quiros-Pacheco, Fernando
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Schurter, Patricio
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Sitarski, Breann
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van Dam, Marcos A.
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Catropa, Dan
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Kansky, Jan
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McLeod, Brian
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McMuldroch, Stuart
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Podgorski, Bill
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Close, Laird
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Gasho, Victor
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Haffert, Sebastiaan
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Hedglen, Alex
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Kautz, Maggie
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Males, Jared
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Gonzalez, Guillermo
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Nemati, Bijan
DOI
Abstract
One of the greatest technical challenges of the doubly-segmented Giant Magellan Telescope is the accurate and stable control of segment piston in the diffraction limited observation mode. To address this challenge, in collaboration with the University of Arizona, Smithsonian Astrophysical Observatory and the Istituto Nazionale di Astrofisica, GMTO is executing a project to optimize and validate segment piston control strategies and algorithms using a pair of testbeds. The testbeds provide disturbances to simulate atmospheric turbulence and differential atmospheric dispersion. In addition to the phasing demonstration, the testbeds offer the opportunity to validate hardware designs for the Acquisition & Guiding Wavefront Sensor (AGWS) and the Natural Guide Star Wavefront Sensor (NGWS) and to mitigate their fabrication and assembly risks. Significant progress is reported in the design of the AGWS and NGWS prototypes as well as preliminary test results from the testbeds....
Coverage
Adaptive Optics Systems VIII
All editors
Schreiber, Laura; Schmidt, Dirk; Vernet, Elise
Series
Volume
12185
Start page
44
Conferenece
Adaptive Optics Systems VIII
Conferenece place
Montréal, Québec, Canada
Conferenece date
17-23 July, 2022
Uri
Url
Issn Identifier
0277-786X
Rights
open.access
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