LUVOIR A Segment level thermo-mechanical stability requirements

Ananya Sahoo; Iva Laginja; Laurent Pueyo; Remi Soummer; Laura E. Coyle; J. Scott Knight; Matthew East

doi:10.1117/12.2594636

1 August 2021 LUVOIR A Segment level thermo-mechanical stability requirements

Ananya Sahoo, Iva Laginja, Laurent Pueyo, Remi Soummer, Laura E. Coyle, J. Scott Knight, Matthew East

Proceedings Volume 11823, Techniques and Instrumentation for Detection of Exoplanets X; 118231N (2021) https://doi.org/10.1117/12.2594636
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

We present a segment-level wavefront stability error budget for the LUVOIR A architecture essential for exoplanet detection. We start with a detailed finite element model to relate the temperature and gravity gradients at the location of the primary mirror to wavefront variations for each segment, and propagate the elements through a diffractive model of the observatory and coronagraphic instrument. Segment level errors are measured via a model of the WFS&C architecture in combination with a Zernike phase sensor and science camera. These sensitivities are used to relate semi-analytically the open and closed loop variance of the segments’ thermo-mechanical modes.

Conference Presentation

Citation Download Citation

Ananya Sahoo, Iva Laginja, Laurent Pueyo, Remi Soummer, Laura E. Coyle, J. Scott Knight, and Matthew East "LUVOIR A Segment level thermo-mechanical stability requirements", Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 118231N (1 August 2021); https://doi.org/10.1117/12.2594636

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