Mr. Arthur H. Symmes Profile

Arthur H. Symmes

Chief Structural Engineer at National Radio Astronomy Observatory

SPIE Involvement:

Author

Area of Expertise:

Structural Engineering , Finite Element Analysis , Fabrication and Production

Websites:

Company Website

Publications (7)

Proceedings Article | 13 December 2020 Presentation + Paper

Lessons learned from the first ALMA antenna overhauls

M. Gallilee, A. Alfaro, R. Arriaza, P. Bello, R. Cabezas, P. Carrillo, J. Cortes, F. Cruzat, F. Gonzalez, A. Hales, O. Hernandez, C. Jara, S. Gairing, G. Gomez, V. Lopehandia, C. Lopez, M. Marchesi, H. Marroquin, S. Martin, J. Millar, N. Mizuno, K. Plarre, R. Price, M. Radiszcz, B. Sepulveda, A. Symmes, C. Zapata

Proceedings Volume 11449, 114490U (2020) https://doi.org/10.1117/12.2561367

KEYWORDS: Antennas, Corrosion, Control systems, Manufacturing

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The first Atacama Large Millimeter/submillimeter Array (ALMA) antennas were inaugurated during 2009 at the facility in San Pedro de Atacama, Chile. The requirement from the original ALMA specification was that antennas shall have a minimum of 10 years between major maintenance (overhauls); therefore the first antennas now require refurbishment at the ALMA technical facility. Refurbishment of the antennas was mainly focused on corrosion and sealing repair, drive system components analysis and exchange, cleaning, control system maintenance, and exchanging several electrical components. ALMA also used the opportunity of the overhaul to make some antenna improvements based on experience from operations. This paper will present the lessons learned from the first overhauls, the planning process, changes from the original manufacturer requirements, the checkout process, and some expected hurdles for future overhauls. The Atacama Large Millimeter/submillimeter Array (ALMA), an international astronomy facility, is a partnership of the European Organisation for Astronomical Research in the Southern Hemisphere (ESO), the U.S. National Science Foundation (NSF) and the National Institutes of Natural Sciences (NINS) of Japan in cooperation with the Republic of Chile. ALMA is funded by ESO on behalf of its Member States, by NSF in cooperation with the National Research Council of Canada (NRC) and the National Science Council of Taiwan (NSC) and by NINS in cooperation with the Academia Sinica (AS) in Taiwan and the Korea Astronomy and Space Science Institute (KASI). ALMA construction and operations are led by ESO on behalf of its Member States; by the National Radio Astronomy Observatory (NRAO), managed by Associated Universities, Inc. (AUI), on behalf of North America; and by the National Astronomical Observatory of Japan (NAOJ) on behalf of East Asia. The Joint ALMA Observatory (JAO) provides the unified leadership and management of the construction, commissioning and operation of ALMA

Proceedings Article | 13 December 2020 Poster + Paper

Correcting primary reflector surface errors produced by excessive thermal dependence on the North American ALMA 12-meter antennas

Art Symmes, Peter Fasel, Jeff Mangum, Klaus Willmeroth

Proceedings Volume 11445, 114455A (2020) https://doi.org/10.1117/12.2560188

KEYWORDS: Antennas, Reflectors, Observatories, Astronomy, Radio astronomy, Radio optics, Adaptive optics, Holography, Testing and analysis, Error analysis

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SPIE Journal Paper | 7 January 2016

Dynamic analysis of the Green Bank Telescope structure and servo system

Trupti Ranka, Mario Garcia-Sanz, Arthur Symmes, John Ford, Timothy Weadon

JATIS, Vol. 2, Issue 01, 014001, (January 2016) https://doi.org/10.1117/12.10.1117/1.JATIS.2.1.014001

KEYWORDS: Data modeling, Telescopes, Servomechanisms, Systems modeling, Finite element methods, Electroluminescence, Astronomical telescopes, Computer programming, Instrument modeling, Device simulation

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Proceedings Article | 5 October 2012 Paper

ALMA nutator design and preliminary performances

Pierre Martin-Cocher, John Ford, Patrick Koch, Chih-Wen Ni, Wei-Long Chen, Ming-Tang Chen, Philippe Raffin, Ching-Long Ong, Paul T. Ho, Arthur Symmes

Proceedings Volume 8452, 845221 (2012) https://doi.org/10.1117/12.925809

KEYWORDS: Mirrors, Servomechanisms, Control systems, Computer programming, Actuators, Control systems design, Field programmable gate arrays, Carbon, LabVIEW, Switching

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Proceedings Article | 23 July 2008 Paper

Study of simple CFRP-metal joint failure

Jingquan Cheng, Antonio Rodriguez, Nicolas Emerson, Arthur Symmes

Proceedings Volume 7018, 70183F (2008) https://doi.org/10.1117/12.786667

KEYWORDS: Adhesives, Epoxies, Metals, Interfaces, Safety, Telescopes, Manufacturing, Temperature metrology, Liquids, Solids

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Proceedings Article | 10 July 2008 Paper

Replacement of the Green Bank Telescope azimuth track

Robert Anderson, Arthur Symmes, Dennis Egan

Proceedings Volume 7012, 701237 (2008) https://doi.org/10.1117/12.784807

KEYWORDS: Telescopes, Californium, Distortion, Connectors, Epoxies, Inspection, Manufacturing, Failure analysis, Optical instrument design, Cements

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Proceedings Article | 10 July 2008 Paper

Improving the service life of the 100-meter Green Bank Telescope azimuth track

Arthur Symmes, Robert Anderson, Dennis Egan

Proceedings Volume 7012, 701238 (2008) https://doi.org/10.1117/12.784935

KEYWORDS: Finite element methods, Telescopes, Cements, Inspection, Antennas, Composites, Chronology, Interfaces, Stress analysis, Astronomical telescopes

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Showing 5 of 7 publications

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