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28 June 2006 MAD star oriented: laboratory results for ground layer and multi-conjugate adaptive optics
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The Multi-Conjugate Adaptive Optics Demonstrator (MAD) built by ESO with the contribution of two external consortia is a powerful test bench for proving the feasibility of Ground Layer (GLAO) and Multi-Conjugate Adaptive Optics (MCAO) techniques both in the laboratory and on the sky. The MAD module will be installed at one of the VLT unit telescope in Paranal observatory to perform on-sky observations. MAD is based on a two deformable mirrors correction system and on two multi-reference wavefront sensors (Star Oriented and Layer Oriented) capable to observe simultaneously some pre-selected configurations of Natural Guide Stars. MAD is expected to correct up to 2 arcmin field of view in K band. MAD is completing the test phase in the Star Oriented mode based on Shack-Hartmann wavefront sensing. The GLAO and MCAO loops have been successfully closed on simulated atmosphere after a long phase of careful system characterization and calibration. In this paper we present the results obtained in laboratory for GLAO and MCAO corrections testing with bright guide star flux in Star Oriented mode paying also attention to the aspects involving the calibration of such a system. A short overview of the MAD system is also given.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Enrico Marchetti, Roland Brast, Bernard Delabre, Rob Donaldson, Enrico Fedrigo, Christoph Frank, Norbert Hubin, Johann Kolb, Miska Le Louarn, Jean-Louis Lizon, Sylvain Oberti, Fernando Quirós-Pacheco, Roland Reiss, Joana Santos, Sebastien Tordo, Andrea Baruffolo, Paolo Bagnara, Antonio Amorim, and Jorge Lima "MAD star oriented: laboratory results for ground layer and multi-conjugate adaptive optics", Proc. SPIE 6272, Advances in Adaptive Optics II, 62720O (28 June 2006);

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