MUSE ASSIST and GLAO Update

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MUSE - ASSIST and GLAO Update

• Remko Stuik and Ralf Flicker
• Leiden Observatory

Opticon AO-JRA Milestone 1 Meeting 16 17
September 2004, LAOG Grenoble, France
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Outline

• In this talk
• Introduction
• MUSE/MUSE AO
• Leiden HRA Laboratory
• ASSIST
• GLAO
• End the next half year brings

3
Remember MUSE

• MUSE is...
• ... the Multi Unit Spectroscopic Explorer
• ... an AO assisted Integral Field Spectrograph
• ... a gen-2 VLT instrument
• ... intended for deep surveys
• MUSE will use...
• The VLT DSM
• ... 4 laser guide stars in 2
• ... 1 VIS(lt18)/IR NGS in 3

4
Summary of Contribution

• MUSE, MUSE, MUSE
• MUSE/MUSE AO
• Leiden AO Laboratory and the High-Order AO
  testbed
• Adaptive Secondary Simulator and InStrument Test
  bed
• GLAO Algorithms

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MUSE/MUSE AO

• MUSE/MUSE AO
• Interface Control Documents
• MUSE AO - MUSE
• AO Technical Specifications
• LGS positioning
• On the edge or behind the secondary?
• Fratricide

6
Leiden AO Laboratory

• Infrastructure
• HO-AO test setup
• Initial tests for the development of ASSIST

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ASSIST (I) - Elements

• Adaptive Secondary Simulator and InStrument Test
  bed
• Your personal assistant for European testing of
  instruments which use the VLT DSM
• Opto-mechanical, data and control interface equal
  to
• VLT focal plane
• DSM electronical interface

Opto-mechanical interface
Star Simulator
Optics
Turbulence Simulator
Optics
DSM Simulator
Optics
Focal Plane Interface
Pupil Image Rotation Simulator
Optics
RTC
High-speed data interface
Control Computer
(Low-speed) control interface
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ASSIST (II) Requirement Overview
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ASSIST (III) - Challenges

• ASSIST
• Which instruments to test
• MUSE!, X-shooter, HAWK-I,
• Wavelength range?
• 10 µm all reflective
• FoV?
• 13.5 50 cm focal plane!
• Nasmyth Cassegrain?
• How to test the test setup?
• Requires a 5 WFS system?
• One WFS available for testing of individual
  subsystems
• RTC will be available in Leiden ? Closed loop on
  one guide star!

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ASSIST (IV) Status and Todo

• Done First iteration with ESO on specs
• To do next 6 months
• Finalize ASSIST specifications
• Interface Control Document
• Investigate ASSIST
• Size financing
• SOW

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GLAO (I) The Layout
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GLAO (II) - Reconstruction
One approach based on virtual tomography (Other
approaches plausible, e.g. minimum variance)
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GLAO (III) An example

• P I - U0U0T
• U0 null-modes
• I identity matrix
• T I (identical bases)

• High-order I-band AO(MUSE) Not working so well
• Tomographic estimation poor
• Tilt anisoplanatism off-axis
• Needs work!

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GLAO (IV) - Status

• Current Status
• Verifying Yorick AO (Rigaut) versus ESO (Miska)
• SVD versus MAP
• Implementing
• Extended source LGS
• Fratricide
• WFS optimization
• Sparse methods
• Searching for better reconstructors WFM/NFM
• Higher Strehl
• More uniform over FoV
• Robust for worse atmospheric conditions

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GLAO (IVa) YAO vs ESO
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GLAO (IVb) YAO vs ESO
PSFs
Ensquared Energy zoom
Ensquared Energy
Seeing Limited (YAO) Seeing Limited (ESO) AO
Corrected (ESO) AO Corrected (YAO)
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GLAO (IV) - Status

• Current Status
• Verifying Yorick AO (Rigaut) versus ESO (Miska)
• SVD versus MAP
• Implementing
• Extended source LGS
• Fratricide
• WFS optimization
• Sparse methods
• Searching for better reconstructors WFM/NFM
• Higher Strehl
• More uniform over FoV
• Robust for worse atmospheric conditions

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Timeline

• 03/2004 Kick-off ?
• 09/2004 Milestone meeting ?
• 10/2004 03/2005 MUSE Requirements
• MUSE TLR
• MUSE AO Specs
• LGS positioning
• 03/2004 04/2005 Development of LAOLAB
• Infrastructure ?
• HO-AO test setup
• Initial tests for the development of ASSIST
• 03/2004 03/2005 ASSIST Requirements
• Iterations with ESO ?
• Fix Requirements
• 04/2005 03/2006 ASSIST Preliminary Design
• 04/2006 03/2007 ASSIST Final Design
• 04/2007 02/2009 Construction ASSIST
• 03/2009 05/2009 ASSIST AIT
• 04/2004 03/2006 GLAO Real-time Control and
  Algorithms
• Verification of simulation environment ?

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• The End