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First Light LBT AO System introduction

First Light LBT AO System introduction. Presented by : S. Esposito Osservatorio Astrofisico di Arcetri / INAF. LBT672. AGW unit. First light AO for LBT: W LBT. Arcetri group 4 First Light AO (FLAO). PI S. Esposito. W LBT unit Resp. S. Esposito. LBT672 Resp. A. Riccardi. AO SW

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First Light LBT AO System introduction

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  1. AO review meeting, Florence, November 10-11 2005. First Light LBT AOSystem introduction Presented by: S. Esposito Osservatorio Astrofisico di Arcetri / INAF

  2. LBT672 AGW unit AO review meeting, Florence, November 10-11 2005. First light AO for LBT: WLBT

  3. AO review meeting, Florence, November 10-11 2005. Arcetri group 4 First Light AO (FLAO) PI S. Esposito WLBT unit Resp. S. Esposito LBT672 Resp. A. Riccardi AO SW Resp. L. Fini A. Tozzi A. Puglisi E. Pinna A. Cavallaro M. Xompero D. Zanotti C. Del vecchio L. Busoni A. Puglisi MicroGate ADS 15 people total P. Stefanini, P. Ranfagni, S. Busoni, F. Camiciottoli, R. Tubbs

  4. Contract No. AO104: Adaptive secondaries development test and comm. Responsible: A. Riccardi Test and Optimization of Secondary operation AdSec Contract: Adaptive secondaries production. Responsible: R. Biasi (MicroGate, ADS) Realization of 672 actuators secondary (2 units) AGW contract: Acquisition Guiding and Wavefront sensing unit Responsible: J. Storm (AIP) Design and realization of Acquisition, Guiding and Active Optics WFS (4 units) AO review meeting, Florence, November 10-11 2005. Various contracts related to FLAO Contract No. AO103: On Axis Wavefront sensing units, WLBT. Responsible: S. Esposito (Arcetri) WFS system Hardware (2 units) and Software (real time & supervisor) LBT TCS & LUCIFER HW and SW

  5. AO review meeting, Florence, November 10-11 2005. AO system network AO supervisor GUI LBT672 Look up tables LBT672 Parameters/Diagnostic Scripts Low level functions Real time link WLBT Operating modes AO loop Parameters/Diagnostic AO TCS GUI

  6. AO review meeting, Florence, November 10-11 2005. LBT First light AO system key-features Adaptive secondary pro: Optimal coupling with AO system, simple and effective: Overall AO system optical efficiency 0.5 including CCDQE Con: No easy measurement of interaction matrix Pyramid sensor pro: Pyramid WFS behaves better than Shack-Hartmann in faint and bright regime. Con: only one pyramid wavefront sensor working in AO. In use at AdOpt@TNG. • 911 mm convex secondary • 1.7mm adaptive shell thickness • 672 actuators • Stroke 30/40 Low order, 1 high order • Response time 0.5ms • Mirror fitting error 30-60nm • Small size unit 300x400mm • 2 channels: Sensing and Acq. • Ref. Star FoV 3.2x2.2 arcmin • Pupil sampling 30x30,15x15,..5x5 • Reference star acquired translating • the WFS board: 0.6mm/arcsec

  7. WF and WFS signal RMS for VLT adsec On sky results achieved with AdOpt@TNG SPWFS S±4l /D ? magnitudes AO review meeting, Florence, November 10-11 2005. What about cons ? A. Ghedina et al. SPIE 2004 MMT test ?

  8. AO review meeting, Florence, November 10-11 2005. FLAO general schedule & Milestones schedule milestones Acceptance test

  9. AO review meeting, Florence, November 10-11 2005. The FLAO Observing modes • Fixed Mode. Seeing limited mode (FXM) • MODS • LUCIFER • Tip-Tilt mode. Field Stabilization mode (TTM) • Auto configured AO mode (AAO). • Basic AO mode using look up tables for AO system configuration & and control • Auto configured Interactive AO mode (AIAO) • Interactive AO mode with selectable main loop parameters • Integration time • WFS CCD Binning • Number of corrected modes • Pyramid modulation

  10. AO review meeting, Florence, November 10-11 2005. Conclusion • FLAO system is made up of several contracts. • No contract cover the complete AO system telescope int., test and comms. • Two relatively new units are used in the FLAO system • LBT672 adaptive secondary, ensure better optical efficiency than conventional DMs. • WLBT pyramid wavefront sensor, better performance with NGS with respect to SH sensor (faint end, bright end) • FLAO schedule spans from today (Jan02-Jan08) to Jan 08. After February 05 AO progress meeting: • Milestones defined • Acceptance tests definition in progress (70%) • need some upgrades and syncro with LBT schedule

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