Testbed multi-star wavefront control experiment modeling analysis

Hanying Zhou; David Marx; Camilo Mejia Prada; Dan Sirbu; Ruslan Belikov

doi:10.1117/12.2676172

5 October 2023 Testbed multi-star wavefront control experiment modeling analysis

Hanying Zhou, David Marx, Camilo Mejia Prada, Dan Sirbu, Ruslan Belikov

Proceedings Volume 12680, Techniques and Instrumentation for Detection of Exoplanets XI; 1268026 (2023) https://doi.org/10.1117/12.2676172
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

The Astro2020 Decadal Survey calls for a mission yield goal of 25 or more habitable zone planets detection and characterization in its recommendation of next NASA flagship mission, the Habitable World Observatory (HWO). Multi-Star Wavefront Control (MSWC) is a technique that enables simultaneous star light suppression of a binary or more star system. It has the potential to help achieve the goal by substantially increasing viable target samples to beyond single star systems. Technology development for MSWC has been ongoing for a number of years. Recently a better than 1e-7 monochromatic contrast was demonstrated at JPL’s High Contrast Imaging Testbed (HCIT) with a true binary source having similar Alpha Centauri star system separation for the first time. Here we present (High Order) Wavefront Sensing and Control (HOWFSC) modeling analysis of the testbed experiments for improving future performance. Our model is a modified extension of the HOWFSC engineering model that has proven to be a valuable tool for Roman Coronagraph Instrument (CGI) and was validated on the HCIT. It includes crucial engineering features and factors relevant to testbed (while omitting CGI specific elements) such as probing and sensing with detector noise and finite bandwidth used. The analysis provides important insight into and understanding of MSWC testbed experiments and identifies key performance-limiting factors that were not previously considered. Adjustments in both hardware and WFSC strategy and algorithm are discussed for next round testbed experiments to improve performance necessary for both Roman and HWO.

Citation Download Citation

Hanying Zhou, David Marx, Camilo Mejia Prada, Dan Sirbu, and Ruslan Belikov "Testbed multi-star wavefront control experiment modeling analysis", Proc. SPIE 12680, Techniques and Instrumentation for Detection of Exoplanets XI, 1268026 (5 October 2023); https://doi.org/10.1117/12.2676172

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