Segment-level Thermal Sensitivity Analysis For Exo-Earth Imaging
We present a segment-level wavefront stability error budget for space telescopes essential for exoplanet detection. We use a detailed finite element model to relate the temperature gradient at the location of the primary mirror to wavefront variations on each of the segment.
We apply the PASTIS sensitivity model forward approach to allocate static tolerances in physical units for each segment, and transfer these tolerances to the temporal domain via a model of the WFS&C architecture in combination with a Zernike phase sensor and science camera.
We finally estimate the close-loop variance and limiting contrast for the segments’ thermo-mechanical modes.
Ananya Sahoo, Iva Laginja, Laurent Pueyo, Remi Soummer, Laura E. Coyle, J. Scott Knight, Matthew East
Comments: 13 pages, 7 figures, appeared in the Proceedings of SPIE Astronomical Telescopes + Instrumentation, 2022
Subjects: Instrumentation and Methods for Astrophysics (astro-ph.IM)
Cite as: arXiv:2209.06762 [astro-ph.IM] (or arXiv:2209.06762v1 [astro-ph.IM] for this version)
Related DOI:
https://doi.org/10.1117/12.2630592
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Submission history
From: Ananya Sahoo [view email]
[v1] Wed, 14 Sep 2022 16:32:56 UTC (9,992 KB)
https://arxiv.org/abs/2209.06762
Astrobiology,