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Jitter studies for the secondary and tertiary mirror systems on the Thirty Meter Telescope

Ford, Virginia and Carter, Christopher and Delrez, Christophe and Fumi, Pierluigi and Gabriel, Eric and Gallieni, Daniele (2014) Jitter studies for the secondary and tertiary mirror systems on the Thirty Meter Telescope. In: Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation. Proceedings of SPIE. No.9151. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 91512H. ISBN 978-0-8194-9619-5. http://resolver.caltech.edu/CaltechAUTHORS:20150612-135150018

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Abstract

The Secondary Mirror System (M2S) and Tertiary Mirror System (M3S) of the Thirty Meter Telescope (TMT) consist of passively mounted mirrors supported in kinematic cell assemblies that are moved during telescope tracking to counteract effects of changing zenith angle and thermal gradients within the telescope structure. TMT is concerned that the requirements for pointing jitter during Adaptive Optics tracking for the M2 and M3 Systems are very challenging with a risk of requiring complex stabilization systems for compliance. Both systems were researched to determine whether similar un-stabilized hardware exists that can meet the TMT jitter requirements. Tests using representative TMT tracking motions were then performed to measure jitter on similar existing hardware. The results of these hardware tests have been analyzed. Test results, remaining risk assessment and further testing plans are presented.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1117/12.2055036 DOIArticle
http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1890924PublisherArticle
Additional Information:© 2014 SPIE. I would like to acknowledge the expertise, guidance and support provided by management staff of ADS International, S.r.l, and Advanced Mechanical & Optical Systems S.A. The TMT Project gratefully acknowledges support of TMT collaborating institutions. They are: Association of Canadian Universities for Research in Astronomy (ACURA), the California Institute of Technology, the University of California, the National Astronomical Observatory of Japan, the National Astronomical Observatories of China and consortium partners, and the Department of Science and Technology of India and supported institutes. 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), the U.S. National Science Foundation, and the National Institutes of Natural Sciences of Japan.
Funders:
Funding AgencyGrant Number
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
CaltechUNSPECIFIED
University of CaliforniaUNSPECIFIED
National Astronomical Observatory of JapanUNSPECIFIED
National Astronomical Observatories of ChinaUNSPECIFIED
Department of Science and Technology of IndiaUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for Innovation (CFI) UNSPECIFIED
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
National Institutes of Natural Sciences of JapanUNSPECIFIED
Subject Keywords:jitter, filtered jitter. tracking, hexapod, following error, rotation-tilt gimbal, alt-az telescope, mirror positioner
Record Number:CaltechAUTHORS:20150612-135150018
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150612-135150018
Official Citation:Virginia Ford ; Christopher Carter ; Christophe Delrez ; Pierluigi Fumi ; Eric Gabriel ; Daniele Gallieni; Jitter studies for the secondary and tertiary mirror systems on the Thirty Meter Telescope. Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 91512H (July 25, 2014); doi:10.1117/12.2055036
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58216
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Jun 2015 01:11
Last Modified:13 Jun 2015 01:11

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