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Wavefront error budget development for the Thirty Meter Telescope laser guide star adaptive optics system

Gilles, Luc and Wang, Lianqi and Ellerbroek, Brent (2008) Wavefront error budget development for the Thirty Meter Telescope laser guide star adaptive optics system. In: Adaptive Optics Systems. Proceedings of SPIE. No.7015. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 701520. ISBN 9780819472250. http://resolver.caltech.edu/CaltechAUTHORS:20180802-154731633

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Abstract

This paper describes the modeling effort undertaken to derive the wavefront error (WFE) budget for the Narrow Field Infrared Adaptive Optics System (NFIRAOS), which is the facility, laser guide star (LGS), dual-conjugate adaptive optics (AO) system for the Thirty Meter Telescope (TMT). The budget describes the expected performance of NFIRAOS at zenith, and has been decomposed into (i) first-order turbulence compensation terms (120 nm on-axis), (ii) opto-mechanical implementation errors (84 nm), (iii) AO component errors and higher-order effects (74 nm) and (iv) tip/tilt (TT) wavefront errors at 50% sky coverage at the galactic pole (61 nm) with natural guide star (NGS) tip/tilt/focus/astigmatism (TTFA) sensing in J band. A contingency of about 66 nm now exists to meet the observatory requirement document (ORD) total on-axis wavefront error of 187 nm, mainly on account of reduced TT errors due to updated windshake modeling and a low read-noise NGS wavefront sensor (WFS) detector. A detailed breakdown of each of these top-level terms is presented, together with a discussion on its evaluation using a mix of high-order zonal and low-order modal Monte Carlo simulations.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.786971DOIArticle
Additional Information:© 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). The authors gratefully acknowledge the support of the TMT partner institutions. They are the Association of Canadian Universities for Research in Astronomy (ACURA), the California Institute of Technology and the University of California. This work was supported as well by the Gordon and Betty Moore Foundation, the Canada Foundation for Innovation, the Ontario Ministry of Research and Innovation, the National Research Council of Canada, the Natural Sciences and Engineering Research Council of Canada, the British Columbia Knowledge Development Fund, the Association of Universities for Research in Astronomy (AURA) and the U.S. National Science Foundation.
Group:Thirty Meter Telescope
Funders:
Funding AgencyGrant Number
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
CaltechUNSPECIFIED
University of CaliforniaUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
British Columbia Knowledge Development FundUNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
NSFUNSPECIFIED
Subject Keywords:Thirty Meter Telescope, Laser guide stars, Modeling, Adaptive Optics
Record Number:CaltechAUTHORS:20180802-154731633
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180802-154731633
Official Citation:Luc Gilles, Lianqi Wang, Brent Ellerbroek, "Wavefront error budget development for the Thirty Meter Telescope laser guide star adaptive optics system", Proc. SPIE 7015, Adaptive Optics Systems, 701520 (10 July 2008); doi: 10.1117/12.786971; https://doi.org/10.1117/12.786971
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88549
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:02 Aug 2018 23:22
Last Modified:02 Aug 2018 23:22

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