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Ground-layer adaptive-optics system modelling for the ChineseLarge Optical/Infrared Telescope

Peng, J.; Basden, A.; Osborn, J.

Ground-layer adaptive-optics system modelling for the ChineseLarge Optical/Infrared Telescope Thumbnail


Authors

J. Peng

A. Basden



Abstract

The Chinese Large Optical/Infrared Telescope is currently undergoing design studies. A ground-layer adaptive-optics system (GLAO) has been proposed, with a 14 -arcmin field of view (FOV) and moderate adaptive-optics correction using a deformable secondary mirror, several laser guide stars (LGS) and wavefront sensors. Due to its large FOV and relatively complex structure, some important problems should be analysed to aid budget considerations for the whole telescope. In this paper, we propose a FOV-related evaluation factor to describe the GLAO performance and use an end-to-end Monte Carlo simulation to test its performance under different configurations. To accelerate the parameter space exploration speed, we split the parameter space of the GLAO system and apply a bottom-up search procedure for parameter selection. We also propose a simplified turbulence geometric model to evaluate the GLAO performance with different turbulence-profile-related parameters. With the above methods, we analyse the required number of deformable mirror (DM) actuators, the number, position and magnitude of LGS and explore the DM tilt-conjugation problem for this GLAO system.

Citation

Peng, J., Basden, A., & Osborn, J. (2018). Ground-layer adaptive-optics system modelling for the ChineseLarge Optical/Infrared Telescope. Monthly Notices of the Royal Astronomical Society, 479(1), 829-843. https://doi.org/10.1093/mnras/sty1507

Journal Article Type Article
Acceptance Date Jun 6, 2018
Online Publication Date Jul 5, 2018
Publication Date Jul 5, 2018
Deposit Date Aug 20, 2018
Publicly Available Date Aug 22, 2018
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 479
Issue 1
Pages 829-843
DOI https://doi.org/10.1093/mnras/sty1507
Public URL https://durham-repository.worktribe.com/output/1322511

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Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2018 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.






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