Wind responses of the LSST secondary mirror

Myung K. Cho; Konstantinos Vogiatzis; Jacques Sebag; Douglas R. Neill

doi:10.1117/12.926649

25 September 2012 Wind responses of the LSST secondary mirror

Myung K. Cho, Konstantinos Vogiatzis, Jacques Sebag, Douglas R. Neill

Proceedings Volume 8449, Modeling, Systems Engineering, and Project Management for Astronomy V; 844905 (2012) https://doi.org/10.1117/12.926649
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

Abstract

The Large Synoptic Survey Telescope (LSST) optical design calls for a large annular 3.4 m diameter meniscus convex aspheric Secondary Mirror (M2). The M2 has a mass of approximately 1.5 metric tons and the optimized mirror support system consists of 72 axial actuators, mounted at the mirror back surface, and 6 tangent link lateral supports mounted around the outer edge. A fully integrated M2 Finite Element Model (FEM) including the mirror and the support systems has been developed to investigate the performance of the M2 assembly and to determine the image degradation due to dynamic wind loading. Detailed wind response analysis was performed based on the input from Computational Fluid Dynamics (CFD) simulations. Image quality calculations of the time history responses and Power Spectrum Density (PSD) are addressed.

Citation Download Citation

Myung K. Cho, Konstantinos Vogiatzis, Jacques Sebag, and Douglas R. Neill "Wind responses of the LSST secondary mirror", Proc. SPIE 8449, Modeling, Systems Engineering, and Project Management for Astronomy V, 844905 (25 September 2012); https://doi.org/10.1117/12.926649

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available