LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT672 1 LBT672: Arcetri progress report A. Riccardi, M. Xompero, D. Zanotti, A. Puglisi, C. del Vecchio, P. Ranfagni, P. Stefanini

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT672 2 Overview Sketch of LBT672 connections Arcetri activities and people P45 work progress Progress of AdSec-related SW development Arcetri optical test facility progress Schedule

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT672 3 spider-arm rack Tel. power LBT672 with 1st light AO TCS AO SupervisorTCS BCU of W-unit LBT672 BCUs +PB Hexapod RT comm Conf/diag comm Power Lines

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT672 4 Tel. power LBT672 with multiple AO sys TCS AO Supervisor TCS BCU of W-unit spider-arm rack LBT672 BCUs +PB Hexapod BCU of LBTI BCU of NIRVANA AO-selector BCU on elev. platform

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT672 5 LBT672 & Arcetri Activities AdSec contractual activities (contract#AO104) –A1) Development and test of proto and final units –A2) Numerical simulations (Shell FEA) –A3) Software development (configuration, characterization and diagnostic) –A4) Metrology and test equipment (Shell flattening) –A5) Closed-loop test (Arcetri Test Tower) –A6) Mountain integration and test –A7) Commissioning on the telescope People: –A. Riccardi (system, SW, test) –M. Xompero, D. Zanotti (SW, test) –A. Puglisi (interface to AO supervisor) –X. Xxxxx (Diagnostic data SW) (15/03/2005) –P. Ranfagni (Test equipment) –C. Del Vecchio (FEA) –P. Stefanini (Mechanical components)

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT672 6 A1: test of P45 in Arcetri P45 + MMT crate-electronics (till mid May 2004) Noise test of new capsens (typical 1.7nm 40  m gap) Flattening of P45 shell (14nm rms, 3% extra power) Test of digital damping concept (0.7ms 68  m gap) Flattening with bias magnets (17nm rms)

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT672 7 A1: test of P45 in Arcetri P45 + LBT crate-electronics (from mid May 2004) + Power Backplain Noise with large spectral features and crosstalk with coil Large noise due to crosstalk with new switching power supplies Most of the Microgate (hardware) and Arcetri (software) effort for noise analysis and optimization in order to freeze asap final electronic layout reorganization of ground connections optimization of ADC, DAC and capsens sample-hold timing optimization of analog filters including anti-aliasing optimization of current driver response

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT672 8 A1: test of P45 in Arcetri Optimized P45+final crate electronics: early Feb 2005 flat noise spectrum typical noise 1.3nm 40  m gap (old crates: 1.7nm rms) typical noise 3.5nm 68  m gap step response with ms settling 68  m gap chopping of ±70  m 128  m gap (to be optimized) Electronics definitively frozen and sent to production

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT672 9 A3: LBT672 SW development AO supervisor RT diagnostics BCU of W-unit RT DSP software RT reconstructor Provided by MG, currently under debugging in Arcetri with P45+W-BCU: modal recontructor modal filtering actuator command conv. FF computation wrt caps pos Ctrl current integration limits for: Mode coeffs and  coeffs capsens pos act  cmd act force FF  force 1st implementation: if out of limits skip the actual frame, keep the old data and increase a counter for slow diagnostics Future implementation: keep the old value for data out of limits, use the new data for others Limits computed by FEA of stress by C. del Vecchio (stress inf. Functions, on progress)

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT A3: LBT672 SW development AO supervisor Adsec Configuration SW (IDL) Adsec Diagnostic SW (C,C++) Adsec Calibration SW (IDL) BCU of W-unit RT DSP software FF matrix (done and tested) Flattening (need opt for 672) Optical Interaction matrix (to be written) 1sec sampling data: Temperatures Voltages Coil damages 10ms sampling data: capsens positions actuator currents RT fault detection Download data done Handling and postprocess tbw Configuration files (txt,fits) for any configurable parameter: ref square wave ctrl filter coeffs coil efficiency ff matrix ecc (about 30 files, actually)

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT A4+5: Optical tests Main target: Test and characterization of the Optical Closed Loop for the Complete and Final AO System before 1 st light Adaptive Secondary Tests: Optical Flattening and calibration Optical behavior at “mountain” ambient temperature Dynamical Behavior at “mountain” atmospheric pressure WFS Optical Test: Optical interaction with LBT672 Optical Closed loop operation

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT A4+5: Optical tests F2 F1 F/15.0 F/ mm mm 911mm Lab Winch

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT A4+5: Optical tests Delay in the ref-optics holder (not yet designed) Ref-optics already delivered. Currently under assembling in Arcetri (P. Stefanini) 3cm 2cm

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT Solved critical issues Hardware of new crate electronics (including Power BP) has been debugged and optimized Suitable grounding connections have been determined Bias magnets have been implemented and tested Digital damping has been successfully tested –AO at large gap (less sensitivity to contamination) –Chopping (to be optimized, see Xompero talk) Optical test tower has been erected and is mechanically and thermally stable

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT Work to do for LBT672 Test of multiple crate behavior on P45 Complete the diagnostic software Optical closed loop of P45+W for software and hardware validation at system level Detailed definitions of operative modes es. chopping mode: who provide sync, how? es. offloading of static aberrations Detailed definition of mountain operations: Accessibility to secondary location Telescope facilities (semi-clean room with electric lines, cooling lines for Adsec test and maintenance) Optical alignment procedure Commissioning: detailed sequence of operations

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT Schedule

LBT AO progress report meeting – Firenze, Feb 2005 A. Riccardi: LBT The end