27 July 2016 Accurate laser guide star wavefront sensor simulation for the E-ELT first light adaptive optics module
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Abstract
MAORY will be the multi-conjugate adaptive optics module for the E-ELT first light. The baseline is to operate wavefront sensing using 6 Sodium Laser Guide Stars and 3 Natural Guide Stars to solve intrinsic limitations of artificial beacons and to mitigate the impact of the sodium layer structure and variability. In particular, some critical components of MAORY require to be designed and dimensioned in order to reduce the spurious effects arising from the Sodium Layer density distribution and variation. The MAORY end-to-end simulation code has been designed to accurately model the Laser Guide Star image in the Shack-Hartmann wavefront sensor sub-apertures and to allow sodium profile temporal evolution. The fidelity with which the simulation code translates the sodium profiles in Laser Guide Star images at the wavefront sensor focal plane has been verified using a laboratory Prototype.
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Mauro Patti, Laura Schreiber, Carmelo Arcidiacono, Giovanni Bregoli, Paolo Ciliegi, Emiliano Diolaiti, Simone Esposito, Philippe Feautrier, Matteo Lombini, "Accurate laser guide star wavefront sensor simulation for the E-ELT first light adaptive optics module", Proc. SPIE 9909, Adaptive Optics Systems V, 990977 (27 July 2016); doi: 10.1117/12.2233055; https://doi.org/10.1117/12.2233055
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