On-sky demonstration of high-order focal plane wavefront control with a second stage AO system on MagAO-X

S. Y. Haffert; J. Liberman; J. R. Males; J. Kueny; L. M. Close; K. Van Gorkom; O. Guyon; A. D. Hedglen; M. Y. Kautz; J. Li; J. D. Long; J. Lumbres; E. A. McEwen; L. A. Pearce; L. Schatz; K. Twitchell

doi:10.1117/12.3019208

28 August 2024 On-sky demonstration of high-order focal plane wavefront control with a second stage AO system on MagAO-X

S. Y. Haffert, J. Liberman, J. R. Males, J. Kueny, L. M. Close, K. Van Gorkom, O. Guyon, A. D. Hedglen, M. Y. Kautz, J. Li, J. D. Long, J. Lumbres, E. A. McEwen, L. A. Pearce, L. Schatz, K. Twitchell

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 130971K (2024) https://doi.org/10.1117/12.3019208
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

All high-contrast imaging instruments are plagued by non-common path aberrations (NCPA). MagAO-X has a unique second-stage Adaptive Optics (AO) system that contains a dedicated deformable mirror (DM) that is not seen by the main AO wavefront sensor for NCPA compensation. Our second stage AO system decouples the focal plane wavefront control from the main AO loop that is driven by a pyramid wavefront sensor. This Non-Common Path Aberration Correction DM (ncpcDM) has been recently upgraded from an ALPAO-97 to a Boston Micromachine Kilo-DM. The large increase in the number of actuators on the ncpcDM enables high-order focal plane wavefront control algorithms such as implicit Electric Field Conjugation (iEFC). We developed iEFC on MagAO-X to create a data-driven approach to coronagraphic dark hole digging. Our preliminary results indicate that iEFC together with the second-stage AO system can improve the raw contrast of MagAO-X by one to two orders of magnitude with an even larger gain expected after post-processing. We will review the focal-plane wavefront sensing and control strategies of MagAO-X and present the first on-sky results of iEFC with the second-stage AO system.

Conference Presentation

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

Citation Download Citation

S. Y. Haffert, J. Liberman, J. R. Males, J. Kueny, L. M. Close, K. Van Gorkom, O. Guyon, A. D. Hedglen, M. Y. Kautz, J. Li, J. D. Long, J. Lumbres, E. A. McEwen, L. A. Pearce, L. Schatz, and K. Twitchell "On-sky demonstration of high-order focal plane wavefront control with a second stage AO system on MagAO-X", Proc. SPIE 13097, Adaptive Optics Systems IX, 130971K (28 August 2024); https://doi.org/10.1117/12.3019208

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