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The phase-induced amplitude apodization complex mask coronagraph (PIAACMC) provides high throughput and small inner working angle with little loss in image quality. Coronagraph compatibility with segmented apertures is essential for the success of habitable planet characterization with future large aperture space telescopes, such as the Large UV/Optical/Infrared (LUVOIR) and HabEx telescope mission concepts. The PIAACMC designs are compatible with such segmented telescope apertures with little loss of performance. We report the contrast and other performance results of a PIAACMC coronagraph with a LUVOIR-like pupil mask assembled and tested in a vacuum chamber at the JPL high contrast imaging testbed (HCIT). As the success of electric field conjugation (EFC) to achieve best contrast on the testbed is dependent upon a diffraction model of the coronagraph, we will also discuss variations of the testbed and its diffraction model with the PIAACMC design, including suspected sources of knowledge error in the EFC diffraction model.
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David Marx, Ruslan Belikov, Dan Sirbu, Brian Kern, Camilo Prada, Eduardo Bendek, Daniel Wilson, "Results from the laboratory demonstration of a PIAACMC coronagraph with a segmented aperture," Proc. SPIE 11823, Techniques and Instrumentation for Detection of Exoplanets X, 118230O (1 September 2021); https://doi.org/10.1117/12.2595066