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The upcoming era of Extremely Large Telescopes will result in a significant increase in extrasolar planets detectable by direct imaging. Advances in wavefront sensing and control as well as coronagraphic technologies are necessary to achieve the contrasts and image quality required for detection on ground-based instruments. The Extreme Adaptive Optics Instrument for the Magellan Clay 6.5 m telescope (MagAO-X) serves as a testbed for ground-based adaptive optics and high contrast imaging technology development, working in the visible to near-IR. MagAO-X employs a primary wavefront control loop to correct for high order wavefront errors resulting from atmospheric turbulence. A secondary loop has been implemented for correcting non-common path aberrations and has shown to improve overall system and coronagraphic performance.
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Avalon McLeod, Jared R. Males, Laird M. Close, Olivier Guyon, Sebastiaan Y. Haffert, "Low order wavefront sensing and control on MagAO-X," Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 1268009 (6 October 2023); https://doi.org/10.1117/12.2677974