28 July 2010 System study of EPICS: the exoplanets imager for the E-ELT
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Abstract
ESO and a large European consortium completed the phase-A study of EPICS, an instrument dedicated to exoplanets direct imaging for the EELT. The very ambitious science goals of EPICS, the imaging of reflected light of mature gas giant exoplanets around bright stars, sets extremely strong requirements in terms of instrumental contrast achievable. The segmented nature of an ELT appears as a very large source of quasi-static high order speckles that can impair the detection of faint sources with small brightness contrast with respect to their parent star. The paper shows how the overall system has been designed in order to maximize the efficiency of quasi-static speckles rejection by calibration and post-processing using the spectral and polarization dependency of light waves. The trade-offs that led to the choice of the concepts for common path and diffraction suppression system is presented. The performance of the instrument is predicted using simulations of the extreme Adaptive Optics system and polychromatic wave-front propagation through the various optical elements.
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Christophe Vérinaud, Christophe Vérinaud, Markus Kasper, Markus Kasper, Jean-Luc Beuzit, Jean-Luc Beuzit, Raffaele G. Gratton, Raffaele G. Gratton, Dino Mesa, Dino Mesa, Emmanuel Aller-Carpentier, Emmanuel Aller-Carpentier, Enrico Fedrigo, Enrico Fedrigo, Lyu Abe, Lyu Abe, Pierre Baudoz, Pierre Baudoz, Anthony Boccaletti, Anthony Boccaletti, Mariangela Bonavita, Mariangela Bonavita, Kjetil Dohlen, Kjetil Dohlen, Norbert Hubin, Norbert Hubin, Florian Kerber, Florian Kerber, Visa Korkiakoski, Visa Korkiakoski, Jacopo Antichi, Jacopo Antichi, Patrice Martinez, Patrice Martinez, Patrick Rabou, Patrick Rabou, Ronald Roelfsema, Ronald Roelfsema, Hans Martin Schmid, Hans Martin Schmid, Niranjan Thatte, Niranjan Thatte, Graeme Salter, Graeme Salter, Matthias Tecza, Matthias Tecza, Lars Venema, Lars Venema, Hiddo Hanenburg, Hiddo Hanenburg, Rieks Jager, Rieks Jager, Natalia Yaitskova, Natalia Yaitskova, Olivier Preis, Olivier Preis, Mélanie Orecchia, Mélanie Orecchia, Eric Stadler, Eric Stadler, } "System study of EPICS: the exoplanets imager for the E-ELT", Proc. SPIE 7736, Adaptive Optics Systems II, 77361N (28 July 2010); doi: 10.1117/12.857096; https://doi.org/10.1117/12.857096
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