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Thirty Meter Telescope Narrow Field InfraRed Adaptive Optics System Real-Time Controller Prototyping Results

Smith, Malcolm and Kerley, Dan and Chapin, Edward L. and Dunn, Jennifer and Herriot, Glen and Véran, Jean-Pierre and Boyer, Corinne and Ellerbroek, Brent and Gilles, Luc and Wang, Lianqi (2016) Thirty Meter Telescope Narrow Field InfraRed Adaptive Optics System Real-Time Controller Prototyping Results. In: Adaptive Optics Systems V. Proceedings of SPIE. No.9909. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 99094N. ISBN 978-1-5106-0198-7. http://resolver.caltech.edu/CaltechAUTHORS:20161202-103312352

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Abstract

Prototyping and benchmarking was performed for the Real-Time Controller (RTC) of the Narrow Field InfraRed Adaptive Optics System (NFIRAOS). To perform wavefront correction, NFIRAOS utilizes two deformable mirrors (DM) and one tip/tilt stage (TTS). The RTC receives wavefront information from six Laser Guide Star (LGS) Shack- Hartmann WaveFront Sensors (WFS), one high-order Natural Guide Star Pyramid WaveFront Sensor (PWFS) and multiple low-order instrument detectors. The RTC uses this information to determine the commands to send to the wavefront correctors. NFIRAOS is the first light AO system for the Thirty Meter Telescope (TMT). The prototyping was performed using dual-socket high performance Linux servers with the real-time (PREEMPT_RT) patch and demonstrated the viability of a commercial off-the-shelf (COTS) hardware approach to large scale AO reconstruction. In particular, a large custom matrix vector multiplication (MVM) was benchmarked which met the required latency requirements. In addition all major inter-machine communication was verified to be adequate using 10Gb and 40Gb Ethernet. The results of this prototyping has enabled a CPU-based NFIRAOS RTC design to proceed with confidence and that COTS hardware can be used to meet the demanding performance requirements.


Item Type:Book Section
Related URLs:
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http://dx.doi.org/10.1117/12.2233711 DOIArticle
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2540937PublisherArticle
Additional Information:© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE). The TMT Project gratefully acknowledges the support of the TMT collaborating institutions. They are the California Institute of Technology, the University of California, the National Astronomical Observatory of Japan, the National Astronomical Observatories of China and their consortium partners, the Department of Science and Technology of India and their supported institutes, and the National Research Council of Canada. 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 Natural Sciences and Engineering Research Council of Canada, the British Columbia Knowledge Development Fund, the Association of Canadian Universities for Research in Astronomy (ACURA) , the Association of Universities for Research in Astronomy (AURA), the U.S. National Science Foundation, the National Institutes of Natural Sciences of Japan, and the Department of Atomic Energy of India. NRC-Herzberg gratefully acknowledges the generous support of the Intel Corporation for providing hardware access to allow our benchmarking to continue in a timely manner.
Funders:
Funding AgencyGrant Number
CaltechUNSPECIFIED
University of CaliforniaUNSPECIFIED
National Astronomical Observatory of JapanUNSPECIFIED
National Astronomical Observatories, Chinese Academy of Sciences (NAOC) UNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
British Columbia Knowledge Development FundUNSPECIFIED
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
NSFUNSPECIFIED
National Institutes of Natural Sciences of JapanUNSPECIFIED
Department of Atomic Energy (India)UNSPECIFIED
Intel CorporationUNSPECIFIED
Subject Keywords:NFIRAOS, real-time controller, RTC, adaptive optics, TMT, prototyping, benchmarking
Record Number:CaltechAUTHORS:20161202-103312352
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20161202-103312352
Official Citation:Malcolm Smith ; Dan Kerley ; Edward L. Chapin ; Jennifer Dunn ; Glen Herriot ; Jean-Pierre Véran ; Corinne Boyer ; Brent Ellerbroek ; Luc Gilles ; Lianqi Wang; Thirty Meter Telescope narrow-field infrared adaptive optics system real-time controller prototyping results. Proc. SPIE 9909, Adaptive Optics Systems V, 99094N (July 27, 2016); doi:10.1117/12.2233711.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72524
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:02 Dec 2016 22:42
Last Modified:02 Dec 2016 22:42

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