Results of AO simulations for ELTs

Rodolphe Conan; Miska Le Louarn; J. Braud; Enrico Fedrigo; Norbert N. Hubin

doi:10.1117/12.457998

30 January 2003 Results of AO simulations for ELTs

Rodolphe Conan, Miska Le Louarn, J. Braud, Enrico Fedrigo, Norbert N. Hubin

Proceedings Volume 4840, Future Giant Telescopes; (2003) https://doi.org/10.1117/12.457998
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

Abstract

The design and elaboration of Extremely Large Telescopes (ELT) with primary mirror from 20m to 100m face with many challenges: mechanical, optical, computational, etc. To benefit completely of the full potentiality of such facilities, an Adaptive Optics System (AOS) have also to be designed for these telescopes. For whole field--of--view compensation and full sky coverage, the new but promising Multi--Conjugated Adaptive Optics (MCAO) technique has to be envisaged. The first step towards the design of an MCAO system is the numerical simulation. This is the first challenge we have to face. The scale of AO simulations being imposed by the ratio (D/r₀), the simulation requirements of a MCAOS for an ELT, in terms of computing power and memory available to store the data, reach and sometimes overcome the capacity of actual computers. In ESO, we have evaluated different hardware and software strategies to achieve MCAO simulations goals. Two codes have been developed to simulate MCAOS using an analytical and an end-to-end model. The goals and advantages/limitations of both approaches is shown. The hardware requirements for both methods is also given through the size of their largest matrices. And finally, results of hardware and software tests for MCAO simulations with PC--cluster and paralleled code are presented.

Citation Download Citation

Rodolphe Conan, Miska Le Louarn, J. Braud, Enrico Fedrigo, and Norbert N. Hubin "Results of AO simulations for ELTs", Proc. SPIE 4840, Future Giant Telescopes, (30 January 2003); https://doi.org/10.1117/12.457998

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