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Proceedings Paper

Accurate laser guide star wavefront sensor simulation for the E-ELT first light adaptive optics module
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Paper 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.

Paper Details

Date Published: 27 July 2016
PDF: 14 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 990977 (27 July 2016); doi: 10.1117/12.2233055
Show Author Affiliations
Mauro Patti, Univ. di Bologna (Italy)
INAF - Osservatorio Astronomico di Bologna (Italy)
Laura Schreiber, INAF - Osservatorio Astronomico di Bologna (Italy)
Carmelo Arcidiacono, INAF - Osservatorio Astronomico di Bologna (Italy)
Giovanni Bregoli, INAF - Osservatorio Astronomico di Bologna (Italy)
Paolo Ciliegi, INAF - Osservatorio Astronomico di Bologna (Italy)
Emiliano Diolaiti, INAF - Osservatorio Astronomico di Bologna (Italy)
Simone Esposito, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Philippe Feautrier, Univ. Joseph Fourier-Grenoble 1, CNRS-INSU, Institut de Planétologie et d’Astrophysique de Grenoble (France)
Matteo Lombini, INAF - Osservatorio Astronomico di Bologna (Italy)

Published in SPIE Proceedings Vol. 9909:
Adaptive Optics Systems V
Enrico Marchetti; Laird M. Close; Jean-Pierre Véran, Editor(s)

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