E-ELT Status

1
E-ELT Status

• G. Monnet
• Faculty Meeting May 19th, 2006

2
E-ELT Design Process Status

• Toolbox produced by 5 topical Working Groups
• Science, Instruments, AO, Site Telescope Design
• accessible from ESO public web pages
• Core-ESE WG project definition report completed
• report presented to STC May 11th ESRC May 19th
• covers draft top-level requirements telescope
  system design options
• E-ELT Telescope Project Office installed by June
  1st
• R. Gilmozzi P.I. J. Spyromilio head P.O.
• Basic Reference Design to be presented to ESO
  Community by P.O. ESE November 29th 30th

3
E-ELT WG The Output

• 5 topical Community-ESO WGs
• Science, Instrument, AO, Site Telescope Design
• 586 pages Toolbox produced publicly available

4
E-ELT WG The Actors
5
Main Toolbox components

• 31 Science cases including 7 prominent ones
• prioritized Telescope Instrument requirements

• a timed 12-Instrument suite covering science
  cases
• requirements on Telescope, AO Site
• assessment of technology, complexity, cost risk

• a roadmap for the 5 AO systems required
• requirements on Telescope, Instruments Site
• AO/LGS concepts technological pathfinders

• Site parameters evaluation observing impact

• Telescope Design families evaluation

6
E-ELT Top Level Science Requirements

• a general-use multi-purpose facility(last-hour
  multi-telescope alternative opened)

• an efficient improved-seeing wide-field
  facility(down to visual wavelengths)

• an Instrument-friendly facility

7
E-ELT Design Decision Tree
Aspheric segments ?
AO mirror in Tel.?
Adaptive M2 ?
Option
Option
8
Two Alternative Designs (42-m)
? ? 0.45 µm throughput (high efficiency aged coatings) gt 86 gt 82
Obstruction (area) 1.2 9
Image quality at 5 0.2 diffraction-limited
Enclosure size 10m
9
E-ELT Top Level Science Requirements

• (too?) large impact on telescope design