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High-contrast imager for complex aperture telescopes (HiCAT): 7. Dark zone demonstration with fully segmented aperture coronagraph

Soummer, Rémi and Laginja, Iva and Will, Scott D. and Perrin, Marshall D. and Noss, James and Por, Emiel H. and Redmond, Susan M. and Pourcelot, Raphaël and Sahoo, Ananya and Petrone, Peter and Brooks, Keira J. and Pueyo, Laurent and Nickson, Bryony and Maclay, Matthew and Brady, Gregory R. and Comeau, Thomas and Fowler, Julia and Glazer, Kelsey and Gontrum, Rob and Hagopian, John and Jolivet, Théo and Kautz, Maggie and Leboulleux, Lucie and McChesney, Evelyn and Mugnier, Laurent M. and N'Diaye, Mamadou and Nguyen, Meiji and Olszewski, Heather and Pogorelyuk, Leonid and Prothro, Jaret and Sauvage, Jean-François and Scott, Nathan and Shiri, Ron and Sivaramakrishnan, Anand and Subedi, Hari B. and Weinstock, Sam and Xin, Yinzi and Zhang, Rebecca (2021) High-contrast imager for complex aperture telescopes (HiCAT): 7. Dark zone demonstration with fully segmented aperture coronagraph. In: Techniques and Instrumentation for Detection of Exoplanets X. Proceedings of SPIE. No.11823. Society of Photo-optical Instrumentation Engineers , Bellingham, WA, Art. No. 118230T.

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We present recent laboratory results demonstrating high-contrast coronagraphy for future space-based large segmented telescopes such as the Large UV, Optical, IR telescope (LUVOIR) mission concept studied by NASA. The High-contrast Imager for Complex Aperture Telescopes (HiCAT) testbed aims to implement a system-level hardware demonstration for segmented aperture coronagraphs with wavefront control. The telescope hardware simulator employs a segmented deformable mirror with 36 hexagonal segments that can be controlled in piston, tip, and tilt. In addition, two continuous deformable mirrors are used for high-order wavefront sensing and control. The low-order sensing subsystem includes a dedicated tip-tilt stage, a coronagraphic target acquisition camera, and a Zernike wavefront sensor that is used to measure low-order aberration drifts. We explore the performance of a segmented aperture coronagraph both in “static” operations (limited by natural drifts and instabilities) and in “dynamic” operations (in the presence of artificial wavefront drifts added to the deformable mirrors), and discuss the estimation and control strategies used to reach and maintain the dark zone contrast. We summarize experimental results that quantify the performance of the testbed in terms of contrast, inner/outer working angle and bandpass, and analyze limiting factors by comparing against our end-to-end models.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Soummer, Rémi0000-0003-2753-2819
Perrin, Marshall D.0000-0002-3191-8151
Sahoo, Ananya0000-0003-2806-1254
Pueyo, Laurent0000-0003-3818-408X
Kautz, Maggie0000-0003-3253-2952
N'Diaye, Mamadou0000-0002-1721-3294
Sivaramakrishnan, Anand0000-0003-1251-4124
Xin, Yinzi0000-0002-6171-9081
Additional Information:© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:11823
Record Number:CaltechAUTHORS:20210917-183339804
Persistent URL:
Official Citation:Rémi Soummer, Iva Laginja, Scott Will, Marshall D. Perrin, James Noss, Emiel H. Por, Susan Redmond, Raphaël Pourcelot, Ananya Sahoo, Peter Petrone, Keira Brooks, Laurent Pueyo, Bryony Nickson, Matt Maclay, Gregory R. Brady, Thomas Comeau, Julia Fowler, Kelsey Glazer, Rob Gontrum, John Hagopian, Theo Jolivet, Maggie Kautz, Lucie Leboulleux, Evelyn McChesney, Laurent Mugnier, Mamadou N'Diaye, Meiji Nguyen, Heather Olszewski, Leonid Pogorelyuk, Jaret Prothro, Jean-François Sauvage, Nathan Scott, Ron Shiri, Anand Sivaramakrishnan, Hari Subedi, Sam Weinstock, Yinzi Xin, and Rebecca Zhang "High-contrast imager for complex aperture telescopes (HiCAT): 7. Dark zone demonstration with fully segmented aperture coronagraph", Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 118230T (4 August 2021);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110937
Deposited By: George Porter
Deposited On:17 Sep 2021 19:16
Last Modified:17 Sep 2021 19:16

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