Concept study of a multi-object AO system for the EAGLE instrument on the European ELT

T. Fusco; G. Rousset; F. Assémat; B. Neichel; E. Gendron; R. M. Myers; T. Morris; F. Chemla; C. Robert; I. Bryson; J. G. Cuby

doi:10.1117/12.788381

8 August 2008 Concept study of a multi-object AO system for the EAGLE instrument on the European ELT

T. Fusco, G. Rousset, F. Assémat, B. Neichel, E. Gendron, R. M. Myers, T. Morris, F. Chemla, C. Robert, I. Bryson, J. G. Cuby

Author Affiliations +

Proceedings Volume 7015, Adaptive Optics Systems; 70150T (2008) https://doi.org/10.1117/12.788381
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

EAGLE is a wide FoV (5 arcmin diameter), multi-objects (at least 20) integral-field spectrograph (R>4000) for the E-ELT. The top level requirements are to concentrate 30 to 40 % of the photons collected by the E-ELT in a focal area of 75x75 mas² in H band. This leads to the selection of the Multi Object Adaptive Optics in order to deliver such a performance in a so-large FoV. In this paper, we present a detailed analysis of the error budget for an MOAO system in EAGLE. It is based on numerical simulation results. The budget is splitted in LGS and NGS contributions. The analysis leads to share the specifications between low spatial frequencies and high spatial frequencies in the wave-front errors. Finally a preliminary conceptual design of the MOAO system is deduced including 9 LGS for tomography and a 9000 actuator deformable mirror per channel.

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T. Fusco, G. Rousset, F. Assémat, B. Neichel, E. Gendron, R. M. Myers, T. Morris, F. Chemla, C. Robert, I. Bryson, and J. G. Cuby "Concept study of a multi-object AO system for the EAGLE instrument on the European ELT", Proc. SPIE 7015, Adaptive Optics Systems, 70150T (8 August 2008); https://doi.org/10.1117/12.788381

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