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Proceedings Paper

Laboratory results of the AOF system testing
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Paper Abstract

For two years starting in February 2014, the AO modules GRAAL for HAWK-I and GALACSI for MUSE of the Adaptive Optics Facility project have undergone System Testing at ESO's Headquarters. They offer four different modes: NGS SCAO, LGS GLAO in the IR, LGS GLAO and LTAO in the visible. A detailed characterization of those modes was made possible by the existence of ASSIST, a test bench emulating an adaptive VLT including the Deformable Secondary Mirror, a star simulator and turbulence generator and a VLT focal plane re-imager. This phase aimed at validating all the possible components and loops of the AO modules before installation at the actual VLT that comprises the added complexity of real LGSs, a harsher non-reproducible environment and the adaptive telescope control.

In this paper we present some of the major results obtained and challenges encountered during the phase of System Tests, like the preparation of the Acquisition sequence, the testing of the Jitter loop, the performance optimization in GLAO and the offload of low-order modes from the DSM to the telescope (restricted to the M2 hexapod). The System Tests concluded with the successful acceptance, shipping, installation and first commissioning of GRAAL in 2015 as well as the acceptance and shipping of GALACSI, ready for installation and commissioning early 2017.

Paper Details

Date Published: 27 July 2016
PDF: 10 pages
Proc. SPIE 9909, Adaptive Optics Systems V, 99092S (27 July 2016); doi: 10.1117/12.2232788
Show Author Affiliations
Johann Kolb, European Southern Observatory (Germany)
Pierre-Yves Madec, European Southern Observatory (Germany)
Robin Arsenault, European Southern Observatory (Germany)
Sylvain Oberti, European Southern Observatory (Germany)
Jérôme Paufique, European Southern Observatory (Germany)
Paolo La Penna, European Southern Observatory (Germany)
Stefan Ströbele, European Southern Observatory (Germany)
Robert Donaldson, European Southern Observatory (Germany)
Christian Soenke, European Southern Observatory (Germany)
Marcos Suárez Valles, European Southern Observatory (Germany)
Mario Kiekebusch, European Southern Observatory (Germany)
Javier Argomedo, European Southern Observatory (Germany)
Miska Le Louarn, European Southern Observatory (Germany)
Elise Vernet, European Southern Observatory (Germany)
Pierre Haguenauer, European Southern Observatory (Chile)
Philippe Duhoux, European Southern Observatory (Chile)
Emmanuel Aller-Carpentier, European Southern Observatory (Germany)
Jose Javier Valenzuela, European Southern Observatory (Chile)
Juan Carlos Guerra, European Southern Observatory (Chile)


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

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