27 July 2016 Laboratory results of the AOF system testing
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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.
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Johann Kolb, Johann Kolb, Pierre-Yves Madec, Pierre-Yves Madec, Robin Arsenault, Robin Arsenault, Sylvain Oberti, Sylvain Oberti, Jérôme Paufique, Jérôme Paufique, Paolo La Penna, Paolo La Penna, Stefan Ströbele, Stefan Ströbele, Robert Donaldson, Robert Donaldson, Christian Soenke, Christian Soenke, Marcos Suárez Valles, Marcos Suárez Valles, Mario Kiekebusch, Mario Kiekebusch, Javier Argomedo, Javier Argomedo, Miska Le Louarn, Miska Le Louarn, Elise Vernet, Elise Vernet, Pierre Haguenauer, Pierre Haguenauer, Philippe Duhoux, Philippe Duhoux, Emmanuel Aller-Carpentier, Emmanuel Aller-Carpentier, Jose Javier Valenzuela, Jose Javier Valenzuela, Juan Carlos Guerra, Juan Carlos Guerra, "Laboratory results of the AOF system testing", Proc. SPIE 9909, Adaptive Optics Systems V, 99092S (27 July 2016); doi: 10.1117/12.2232788; https://doi.org/10.1117/12.2232788


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