KOLA: a concept for an optical multi-conjugate adaptive optics system for the W.M. Keck Observatory

Jessica R. Lu; Rich Dekany; Brianna Peck; Antonin Bouchez; Max Millar-Blanchaer; Phil Hinz; Kodi Rider; Mark Chun; Peter Wizinowich; Lianqi Wang; Steph Sallum; Brooke DiGia; Charles-Antoine Claveau

doi:10.1117/12.3020725

29 August 2024 KOLA: a concept for an optical multi-conjugate adaptive optics system for the W.M. Keck Observatory

Jessica R. Lu, Rich Dekany, Brianna Peck, Antonin Bouchez, Max Millar-Blanchaer, Phil Hinz, Kodi Rider, Mark Chun, Peter Wizinowich, Lianqi Wang, Steph Sallum, Brooke DiGia, Charles-Antoine Claveau

Author Affiliations +

Proceedings Volume 13097, Adaptive Optics Systems IX; 130970H (2024) https://doi.org/10.1117/12.3020725
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

We present progress on a conceptual design for a new Keck multi-conjugate adaptive optics system capable of visible light correction with a near-diffraction-limited spatial resolution. The KOLA (Keck Optical LGS AO) system will utilize a planned adaptive secondary mirror (ASM), 2 additional high-altitude deformable mirrors (DMs), and ≳8 laser guide stars (LGS) to sense and correct atmospheric turbulence. The field of regard for selecting guide stars will be 2’ and the corrected science field of view will be 60”. We describe science cases, system requirements, and performance simulations for the system performed with error budget spreadsheet tools and MAOS physical optics simulations. We will also present results from trade studies for the actuator count on the ASM. KOLA will feed a new optical imager and IFU spectrograph in addition to the planned Liger optical + infrared (λ>850nm) imager and IFU spectrograph. Performance simulations show KOLA will deliver a Strehl of 12% at g’, 21% at r’, 53% at Y, and 87% at K bands on axis with nearly uniform image quality over a 40”×40” field of view in the optical and over 60”×60” beyond 1 μm. Ultimately, the system will deliver spatial resolutions superior to HST and JWST (∼17 mas at r’-band) and comparable to the planned first-generation infrared AO systems for the ELTs.

Conference Presentation

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

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Jessica R. Lu, Rich Dekany, Brianna Peck, Antonin Bouchez, Max Millar-Blanchaer, Phil Hinz, Kodi Rider, Mark Chun, Peter Wizinowich, Lianqi Wang, Steph Sallum, Brooke DiGia, and Charles-Antoine Claveau "KOLA: a concept for an optical multi-conjugate adaptive optics system for the W.M. Keck Observatory", Proc. SPIE 13097, Adaptive Optics Systems IX, 130970H (29 August 2024); https://doi.org/10.1117/12.3020725

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