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Proceedings Paper

Getting ready for the first on sky experiment using an ELT-scaled elongated sodium laser guide star
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Paper Abstract

The use of sodium laser guide star for Extremely Large Telescopes (ELT) adaptive optics systems is a key concern due to the perspective effect that produces elongated images in the Shack-Hartmann pattern. In order to assess the feasibility of using an elongated sodium beacon on an ELT, an on-sky experiment reproducing the extreme off-axis launch conditions of the European ELT is scheduled for summer and autumn 2016. The experiment will use the demonstrator CANARY installed on the William Herschel Telescope and the ESO transportable 20W CW fiber laser, embedded in the Wendelstein LGS unit. We will discuss here the challenges this experiment addresses as well as the details of its implementation and the derivation of the error budget.

Paper Details

Date Published: 27 July 2016
PDF: 11 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 990944 (27 July 2016); doi: 10.1117/12.2231611
Show Author Affiliations
Lisa Bardou, LESIA, Observatoire de Paris, CNRS, UPMC, Univ. Paris Diderot (France)
Eric Gendron, LESIA, Observatoire de Paris, CNRS, UPMC, Univ. Paris Diderot (France)
Gérard Rousset, LESIA, Observatoire de Paris, CNRS, UPMC, Univ. Paris Diderot (France)
Damien Gratadour, LESIA, Observatoire de Paris, CNRS, UPMC, Univ. Paris Diderot (France)
Fabrice Vidal, LESIA, Observatoire de Paris, CNRS, UPMC, Univ. Paris Diderot (France)
Tristan Buey, LESIA, Observatoire de Paris, CNRS, UPMC, Univ. Paris Diderot (France)
Fanny Chemla, LESIA, Observatoire de Paris, CNRS, UPMC, Univ. Paris Diderot (France)
Richard M. Myers, Durham Univ. (United Kingdom)
Timothy J. Morris, Durham Univ. (United Kingdom)
Alastair G. Basden, Durham Univ. (United Kingdom)
James Osborn, Durham Univ. (United Kingdom)
Andrew P. Reeves, Durham Univ. (United Kingdom)
Robert Gordon Talbot, Durham Univ. (United Kingdom)
Jean-Luc Gach, LAM, Aix Marseille Univ., CNRS (France)
First Light Imaging S.A.S. (France)
Eric Stadler, First Light Imaging S.A.S. (France)
Institut de Planétologie et d’Astrophysique de Grenoble (France)
Philippe Feautrier, First Light Imaging S.A.S. (France)
Institut de Planétologie et d’Astrophysique de Grenoble (France)
Domenico Bonaccini Calia, European Southern Observatory (Germany)
Thomas Pfrommer, European Southern Observatory (Germany)
Mauro Centrone, INAF - Osservatorio Astronomico di Roma (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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