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Flexure compensation simulation tool for TMT-WFOS Spectrograph

Surya, Arun and Radovan, Matthew and Thirupathi, Sivarani and Sriram, S. and Divakar, Devika and Fucik, Jason (2018) Flexure compensation simulation tool for TMT-WFOS Spectrograph. In: Modeling, Systems Engineering, and Project Management for Astronomy VIII. Proceedings of SPIE. No.10705. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, Art. No. 107051G. ISBN 9781510619630. http://resolver.caltech.edu/CaltechAUTHORS:20180906-153833697

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Abstract

The Wide Field Optical Spectrograph (WFOS) is one of the first-light instruments of Thirty Meter Telescope. It is a medium resolution, multi object, wide field optical spectrograph. Since 2005 the conceptual design of the instrument has focused on a slit-mask based, grating exchange design that will be mounted at the Nasmyth focus of TMT. Based on the experience with ESI, MOSFIRE and DEIMOS for Keck we know flexure related image motion will be a major problem with such a spectrograph and a compensation system is required to mitigate these effects. We have developed a flexure Compensation and Simulation (FCS) tool for TMT-WFOS that provides an interface to accurately simulate the effects of instrument flexure at the WFOS detector plane (e.g image shifts) using perturbation of key optical elements and also derive corrective motions to compensate the image shifts caused by instrument flexure. We are currently using the tool to do mote-carlo simulations to validate the optical design of a slit-mask concept we call Xchange-WFOS, and to optimize the flexure compensation strategy. We intend to use the tool later in the design process to predict the actual flexure by replacing the randomized inputs with the signed displacement and rotations of each element predicted by global FEA model on the instrument.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.1117/12.2312155DOIArticle
Additional Information:© 2018 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.
Group:Thirty Meter Telescope
Funders:
Funding AgencyGrant Number
CaltechUNSPECIFIED
University of CaliforniaUNSPECIFIED
National Astronomical Observatory of JapanUNSPECIFIED
National Astronomical Observatories of ChinaUNSPECIFIED
Department of Science and Technology (India)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
Subject Keywords:Spectroscopy, Instrumentation
Record Number:CaltechAUTHORS:20180906-153833697
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180906-153833697
Official Citation:Arun Surya, Arun Surya, Matthew Radovan, Matthew Radovan, Sivarani Thirupathi, Sivarani Thirupathi, S. Sriram, S. Sriram, Devika Divakar, Devika Divakar, Jason Fucik, Jason Fucik, } "Flexure compensation simulation tool for TMT-WFOS Spectrograph", Proc. SPIE 10705, Modeling, Systems Engineering, and Project Management for Astronomy VIII, 107051G (10 July 2018); doi: 10.1117/12.2312155; https://doi.org/10.1117/12.2312155
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89434
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:06 Sep 2018 23:51
Last Modified:06 Sep 2018 23:51

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