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Experiments at the W.M. Keck Observatory to support the Thirty Meter Telescope design work

Skidmore, Warren and Travouillon, Tony and Riddle, Reed and Kinoshita, Kyle and Johnston, Richard and Murg, Phil and Thompson, Hugh and Matsuda, Richard and Colavita, Mark and Tolleth, Grant and Goodrich, Robert and Chock, Elizabeth and Lewis, Hilton and Panteleev, Sergey (2010) Experiments at the W.M. Keck Observatory to support the Thirty Meter Telescope design work. In: Ground-based and Airborne Telescopes III. Proceedings of SPIE. No.7733. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. no. 773350. ISBN 9780819482235.

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In order to validate various assumptions about the operating environment of the Thirty Meter Telescope (TMT), to validate the modeling packages being used to guide the design work for the TMT and to directly investigate the expected operation of several subsystems we have embarked on an extensive campaign of environmental measurements at the Keck telescopes. We have measured and characterized the vibration environment around the observatory floor and at certain locations on the telescope over a range of operating conditions. Similarly the acoustic environment around the telescope and primary mirror has been characterized for frequencies above 2 Hz. The internal and external wind and temperature fields are being measured using combined sonic anemometer and PRT sensors. We are measuring the telescope position error and drive torque signals in order to investigate the wind induced telescope motions. A scintillometer mounted on the telescope is measuring the optical turbulence inside the telescope tube. This experimental work is supplemented by an extensive analysis of telescope and engineering sensor log files and measurements, primarily those of accelerometers located on the main telescope optics, primary mirror segment edge sensor error signals (residuals), telescope structure temperature measurements and the telescope status information.

Item Type:Book Section
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Riddle, Reed0000-0002-0387-370X
Additional Information:© 2010 Society of Photo-Optical Instrumentation Engineers (SPIE). The TMT project gratefully acknowledges 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. We acknowledge the support of the WMKO Operations and Infrastructure Department supervisors and technicians, Observing Support Department supervisors and observing assistants, Technical Services Department designers and Safety, Health and Environmental Affairs Officer.
Group:Thirty Meter Telescope
Funding AgencyGrant Number
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
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
Subject Keywords:dome seeing, computational fluid dynamics, control system, edge sensors, humidity, vibration, actuators
Series Name:Proceedings of SPIE
Issue or Number:7733
Record Number:CaltechAUTHORS:20180713-143754100
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Official Citation:Warren Skidmore, Tony Travouillon, Reed Riddle, Kyle Kinoshita, Richard Johnston, Phil Murg, Hugh Thompson, Richard Matsuda, Mark Colavita, Grant Tolleth, Robert Goodrich, Elizabeth Chock, Hilton Lewis, Sergey Panteleev, "Experiments at the W.M. Keck Observatory to support the Thirty Meter Telescope design work", Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 773350 (6 August 2010); doi: 10.1117/12.857960;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87848
Deposited By: George Porter
Deposited On:16 Jul 2018 21:02
Last Modified:03 Oct 2019 20:00

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