MAORY for E-ELT. Emiliano Diolaiti (INAF Osservatorio Astronomico di Bologna) On behalf of the MAORY Consortium
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1 MAORY for E-ELT Emiliano Diolaiti (INAF Osservatorio Astronomico di Bologna) On behalf of the MAORY Consortium Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio 2008
2 Multi Conjugate Adaptive Optics guide star target high altitude layer F. Rigaut, MCAO for dummies, SPIE 2000 conjugated plane MAORY: Multi conjugate Adaptive Optics RelaY Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio
3 E-ELT + MAORY F/16 Nasmyth focus Science Instrument MAORY MCAO module includes post-focal deformable mirrors Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio
4 Top level requirements Large field of view mode (up to 2 ) with moderate correction and medium field (20" to 1') mode with high correction quality and uniformity Wavelength range μm (goal 0.6μm) Low thermal background Better performance Better performance FoV λ=2.2μm λ=1.65μm λ=1.25μm λ=0.8μm 2' N/A 1' N/A 20" ~100 EE in 50 mas w.r.t seeing Expected Strehl Ratio ~30 EE in 50 mas w.r.t seeing FoV λ=2.2μm λ=1.65μm λ=1.25μm λ=0.8μm 1' N/A 20" Strehl Ratio on 50% of the sky at the NGP Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio
5 Post-focal relay Field lens M8 M7 Adaptive mirror M10 Adaptive mirror Dichroic To LGS WFS M9 2 arcmin science field of view RMS wavefront error vs. field telescope + MCAO module Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio
6 High-order wavefront sensing Sodium layer Shack-Hartmann WFS Sodium layer Pyramid WFS Pupil plane Pupil plane Detector plane Image plane Issues related to thickness and finite distance of Sodium layer Different solutions under investigation Increase LGS power Dynamic refocusing for pulsed lasers Others Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio
7 Low-order wavefront sensing Low orders of aberration have to be measured using natural guide stars Tip-tilt indetermination with LGS LGS focus error NGS wavefront sensor determines sky coverage! Two possible locations for NGS wavefront sensor Before the MCAO module large field, low correction After the MCAO module smaller field, higher correction NGS wavefront sensing in NIR benefits from MCAO correction Data from Besançon model Very good agreement with SDSS Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio
8 Performance analysis Strehl Ratio at λ = 1.65μm vs. Number of guide stars Number of deformable mirrors Field of view 20" Direction of SR evaluation Field of view 1' Field of view 2' 3 Deformable Mirrors (2 arcmin field) 2 Deformable Mirrors (2 arcmin field) 1 Deformable Mirror (2 arcmin field) Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio
9 Consortium INAF - Osservatorio Astronomico di Bologna + Università di Bologna E. Diolaiti (PI), I. Foppiani (System engineer), M. Lombini, L. Schreiber, G. Bregoli, G. Cosentino, G. Innocenti M. Bellazzini and P. Ciliegi (Science analysis) INAF - Osservatorio Astrofisico di Arcetri S. Esposito, V. Biliotti, L. Busoni, F. Quiros-Pacheco INAF - Osservatorio Astronomico di Padova A. Baruffolo, J. Farinato, C. Arcidiacono, R. Ragazzoni ONERA J.-M. Conan (deputy PI), C. Petit, C. Robert, T. Fusco ESO E. Marchetti (study supervisor), N. Hubin (deputy supervisor), S. D Odorico Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio
10 Project development Two funding sources ESO contract for Phase A study Memorandum of Understanding between INAF and ONERA Contract signed between INAF-OABo and ESO INAF-OABo represents Consortium FP7 study E-ELT Prep (INFRA ) ESO is unique contractor with EU INAF-OABo, UniBo, INAF-OAA, ONERA are 3 rd parties Participant FTE OABo + UniBo 6.3 ONERA 2.4 OAA 2.0 OAPd 0.7 ESO 1.1 TOTAL 12.5 Main project phases Phase 1: Requirements analysis and preliminary trade-off studies Phase 2: Advanced conceptual design Milestone Kick-off Phase 1 review Mid term review Phase 2 review Final acceptance From kick-off To To+9 To+17 To+24 To+36 Strumentazione per telescopi da 8m e E-ELT INAF, Roma, 5 Febbraio
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