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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 3 CONTRIBUTI IN ATTI DI CONVEGNO (Proceedings)
  4. 3.01 Contributi in Atti di convegno
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/26858
Title: Design and status of the NGS WFS of MAORY
Authors: BONAGLIA, MARCO 
AGAPITO, GUIDO 
BUSONI, LORENZO 
CILIEGI, Paolo 
CORTECCHIA, Fausto 
DIOLAITI, EMILIANO 
DI RICO, Gianluca 
ESPOSITO, Simone 
Giordano, Christophe
PLANTET, CEDRIC ANTOINE ADRIEN GABRIEL 
RICCARDI, Armando 
Issue Date: 2017
Volume: Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5)
Abstract: MAORY is the first-light multi-conjugate AO facility of the E-ELT, providing a >30% Strehl ratio (evaluated inK band, median seeing conditions) over the MICADO 53 ×53 arcsec FoV and ensuring an overall sky coverageof 50%. MAORY will implement 3 NGS WFS having a double functionality: sensing the atmospheric low-ordermodes (LO-WFS) and de-trending the LGS WFS measurements (Ref-WFS).To maximize the AO sky-coverage the preliminary design of the LO-WFS foresees a 2×2 subapertures Shack-Hartmann sensor working in the H band, where the partial AO-correction regime and the low-noise detectorsbased on APD technology will enhance the WFS sensitivity. The Reference WFS will measure at slow rate(1÷10 s) the first ∼100 modes of the atmospheric aberration and it will correct the LGS measurements that areaffected by the Sodium layer drifts. The Ref-WFS will be a 10×10 SH making use of a CCD220-based detector.Hence it will work at visibile wavelenghts, using the same NGS of the LO-WFS.We present here the results of a study aimed to find the best design solutions for the MAORY NGS WFSin preparation of the project preliminary design review of scheduled in February 2018. We describe first theoutput of numerical simulations to find the best compromise between the working bandwidth and sampling of theLO-WFS and the sky-coverage corresponding to the expected performance. Then we describe the arrangementfor the NGS WFS module, hosted on top of the MICADO cryostat, analyzing the static and dynamic propertiesof the NGS module structure. Finally we present the opto-mechanical layout for the NGS WFS and its degreesof freedom.
Conference Name: Adaptive Optics for Extremely Large Telescopes 5 (AO4ELT5)
Conference Place: Tenerife, Canary Islands, Spain
Conference Date: 25-30 June, 2017
URI: http://hdl.handle.net/20.500.12386/26858
URL: http://research.iac.es/congreso/AO4ELT5/pages/proceeding0010.html
DOI: 10.26698/AO4ELT5.0010
Fulltext: open
Appears in Collections:3.01 Contributi in Atti di convegno

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