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

Demers, RichardRichardDemersBouchez, AntoninAntoninBouchezQuiros-Pacheco, FernandoFernandoQuiros-PachecoSchurter, PatricioPatricioSchurterSitarski, BreannBreannSitarskivan Dam, Marcos A.Marcos A.van DamCatropa, DanDanCatropaKansky, JanJanKanskyMcLeod, BrianBrianMcLeodMcMuldroch, StuartStuartMcMuldrochPodgorski, BillBillPodgorskiClose, LairdLairdCloseGasho, VictorVictorGashoHaffert, SebastiaanSebastiaanHaffertHedglen, AlexAlexHedglenKautz, MaggieMaggieKautzMales, JaredJaredMalesAGAPITO, GuidoGuidoAGAPITOAZZAROLI, NicoloNicoloAZZAROLICARBONARO, LucaLucaCARBONAROCHEFFOT, Anne Laure LucieAnne Laure LucieCHEFFOTESPOSITO, SimoneSimoneESPOSITOLAPUCCI, TommasoTommasoLAPUCCIPINNA, EnricoEnricoPINNAPLANTET, Cedric Antoine Adrien GabrielCedric Antoine Adrien GabrielPLANTETPUGLISI, Alfio TimothyAlfio TimothyPUGLISIROSSI, FabioFabioROSSIGonzalez, GuillermoGuillermoGonzalezNemati, BijanBijanNemati2025-03-072025-03-072022978151065351197815106535280277-786Xhttp://hdl.handle.net/20.500.12386/36534One 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....STAMPAenPhasing the segmented Giant Magellan Telescope: progress in testbeds and prototypesConference paper10.1117/12.26301442-s2.0-85140045953https://api.elsevier.com/content/abstract/scopus_id/85140045953https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12185/2630144/Phasing-the-segmented-Giant-Magellan-Telescope--progress-in-testbeds/10.1117/12.2630144.fullFIS/05 - ASTRONOMIA E ASTROFISICA