28 July 2010 EAGLE MOAO system conceptual design and related technologies
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Abstract
EAGLE is the multi-object spatially-resolved near-IR spectrograph instrument concept for the E-ELT, relying on a distributed Adaptive Optics, so-called Multi Object Adaptive Optics. This paper presents the results of a phase A study. Using 84×84 actuator deformable mirrors, the performed analysis demonstrates that 6 laser guide stars (on an outer ring of 7.2' diameter) and up to 5 natural guide stars of magnitude R < 17, picked-up in a 7.3' diameter patrol field of view, allow us to obtain an overall performance in terms of Ensquared Energy of 35% in a 75×75mas2 resolution element at H band whatever the target direction in the centred 5' science field for median seeing conditions. In terms of sky coverage, the probability to find the 5 natural guide stars is close to 90% at galactic latitudes |b| ~ 60 deg. Several MOAO demonstration activities are also on-going.
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G. Rousset, G. Rousset, T. Fusco, T. Fusco, F. Assemat, F. Assemat, E. Gendron, E. Gendron, T. Morris, T. Morris, C. Robert, C. Robert, R. Myers, R. Myers, M. Cohen, M. Cohen, N. Dipper, N. Dipper, C. Evans, C. Evans, D. Gratadour, D. Gratadour, P. Jagourel, P. Jagourel, P. Laporte, P. Laporte, D. Le Mignant, D. Le Mignant, M. Puech, M. Puech, H. Schnetler, H. Schnetler, W. Taylor, W. Taylor, F. Vidal, F. Vidal, J.-G. Cuby, J.-G. Cuby, M. Lehnert, M. Lehnert, S. Morris, S. Morris, P. Parr-Burman, P. Parr-Burman, } "EAGLE MOAO system conceptual design and related technologies", Proc. SPIE 7736, Adaptive Optics Systems II, 77360S (28 July 2010); doi: 10.1117/12.856586; https://doi.org/10.1117/12.856586
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