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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 693886.0, MPI für Astronomie / Publikationen_mpia
Multiple FoV MCAO on its way to the sky
Authors:Bergomi, Maria; Viotto, Valentina; Farinato, Jacopo; Marafatto, Luca; Radakrishnan, Kalyan; Ragazzoni, Roberto; Dima, Marco; Magrin, Demetrio; Arcidiacono, Carmelo; Diolaiti, Emiliano; Foppiani, Italo; Lombini, Matteo; Schreiber, Laura; Bertram, Thomas; Bizenberger, Peter; Conrad, Al; Herbst, Tom; Kittmann, Frank; Kopon, Derek; Meschke, Daniel; Zhang, Xianyu; Fini, Luca
Date of Publication (YYYY-MM-DD):2013-01
Title of Proceedings:Proceedings of the Third AO4ELT Conference
Start Page:id. 40
Name of Conference/Meeting:Third AO4ELT Conference
Place of Conference/Meeting:Firenze, Italy
Review Status:Internal review
Audience:Experts Only
Abstract / Description:LINC-NIRVANA, an infrared camera working in a Fizeau interferometric layout, takes advantage of the Layer Oriented MCAO MFoV technique to correct a 2 arcmin FoV using only Natural Guide Stars (NGSs), exploiting the central 10 arcsec with a resolving power of a 23 meter telescope. For each arm of the LBT telescope 2 WaveFront Sensors (WFSs) optically conjugated, respectively at ground and high (7 km) layers, are used to search for NGSs. To avoid unnecessary waste of photons the two sensors look at different FoVs. The ground-layer one, essentially limited by practical conditions, searches for up to 12 NGSs in an annular 2-6 arcmin FoV, while the high-layer one, limited by the pupils superposition, looks for up to 8 NGSs in the central 2 arcmin FoV. The concept has left paper's realm to become glass and metal a few years ago. With the completion of the 2 high-layer WFSs by INAF-Bologna and, recently with the successful tests performed on the first ground-layer WFSs by INAF-Padova, further followed by the GWS Pathfinder experiment to test the ground layer correction at LBT, in collaboration with MPIA-Heidelberg, the concept is finally getting closer to its on-sky commissioning, foreseen in the next very few years. In this paper the basic concepts of MFoV MCAO will be revised, the current status of the system described and the near future toward final completion of the instrument depicted. Moreover a possible path for this concept toward an ELT will be traced.
Comment of the Author/Creator:Date: 2013 online, December 1, 2013
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2013aoel.confE..40B [ID No:1]
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