the e-elt telescope, instruments, technology · the e-elt project top priority of european...
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Project Goal
To deliver and commission, in 2024 and within
budget, the fully functional and complete
European Extremely Large Telescope
➢39.3 m segmented optical telescope on Cerro
Armazones
➢Part of the La Silla Paranal Observatory, operated
from existing facilities at Paranal
➢ It has been organised to include the essential planning
and management staff with most of the effort being
provided by Directorate of Engineering through the
matrix structure
The E-ELT
40-m class telescope: largest optical-
infrared telescope in the world.
Segmented primary mirror.
Active optics to maintain collimation
and mirror figure.
Adaptive optics assisted telescope.
Diffraction limited performance.
Wide field of view: 10 arcmin.
Mid-latitude site (Armazones in Chile).
Fast instrument changes.
VLT level of efficiency in operations.
The Science
Contemporary science:
Exoplanets: radial velocity detections, direct imaging,
transit spectroscopy, proto-planetary disks
Fundamental physics: GR in the strong field limit,
variation of fundamental constants, expansion history
of the Universe
Resolved stellar populations: beyond the Local
Group
The physics of high-redshift galaxies
…and much more!
Synergies with other top facilities:ALMA
JWST
LSST and other survey telescopes
SKA
Discovery potential:Opening new parameter space in terms of
spatial resolution and sensitivity
SKA
JWST
ALMA
LSST
The E-ELT Project
Top priority of European ground-based astronomy (on Astronet and ESFRI lists).
Cerro Armazones in Chile selected as the E-ELT site in April 2010.
Detailed Design Phase completed in 2011. Construction Proposal published in Dec
2011.
Instrument Roadmap (Nov 2011): 2 first-light instruments + plan for 1st generation.
Project fully approved in Dec 2012.
Construction started in 2013.
Start of operations early next decade.
Construction cost: 1083 M€ (including first-light instrumentation).
The Telescope
Nasmyth telescope with a segmented
primary mirror.
Novel 5 mirror design to include
adaptive optics in the telescope.
Classical 3mirror anastigmat + 2 flat
fold mirrors (M4, M5).
M1 (seg): 39.3 mM1 (seg): 39.3 m
M2: 4.2 mM2: 4.2 m
M5 (TT): 2.6x2.1 mM5 (TT): 2.6x2.1 m
Nasmyth focusNasmyth focus
M3: 3.8 mM3: 3.8 m
M4 (AO): 2.4 mM4 (AO): 2.4 m
M1 (seg): 39.3 m
M2: 4.2 m
M5 (TT): 2.6x2.1 m
Nasmyth focus
M3: 3.8 m
M4 (AO): 2.4 m
• Two instrument platforms nearly the size
of tennis courts can host 3 instruments
each + Coudé lab.
• Multiple laser guide stars, launched from
the side.
• Nearly 3000 tonnes of moving structure.
The Mirrors
M1: 39.3 m, 798 hexagonal segments of 1.45 m tip-to-tip: 978 m2 collecting area
M4: 2.4 m, flat, adaptive 6000 to 8000 actuators
M5: 2.6 x 2.1 m, flat, provides tip-tilt correction
The Dome
Classical design.
Diameter = 86 m, height = 74 m.
~3000 tonnes of steel.
Fully air-conditioned and wind
shielded.
✓Site visit 29 January 2014
✓Release Call for Tender Phase 1 5 May 2014
✓Acknowledgement of receipt 3 June 2014
✓Bidders Conference 12 June 2014
✓Deadline questions phase 1 5 January 2015
✓Closing date phase 1 31 January 2015
➢ Release Call for tender Phase 2 15 April 2015
➢ Closing date phase 2 15 June 2015
➢ Release BAFO 1 Sept 2015
➢ Deadline BAFO 15 Sept 2015
DMS CfT updated Planning
Instrument projects
ESO
Consortium of
Institutes
ESO Project
Project
Industry
ESO Contracts and
Procurement
Instrument System
design
Subsystem
designSubsystem
design
manufacture manufacture
Industry
ESO/institutes
Level of procurement
Instrument Procurement model
Majority of instruments obtained from consortia (teams) of member-state institutes
➢Some instruments led by ESO often with institute participation
ESO establishes agreement for construction after a competitive phase
➢ESO pays full hardware/industrial costs• 2-6 M€ for VLT, 10-30 M€ for ELT
➢ Institutes pay for staff to run projects• ESO pays this back with Guaranteed time (200+ VLT nights)
Developed in
consultation with
scientific advisory
groups
Status: Working
with selected
consortia on
Technical
Specifications,
Statements of
Work, Agreements
Instrument RoadmapYear ELT-
IFUELT-CAM
ELT-MIR
ELT-MOS
ELT-HIRES
ELT-6 ELT-PCS
2014 Decide science requirements, AO
architecture.
VISIR start
on-sky
Develop TLRs for MOS/HIRES
Calls for Proposals
Start ETD
2015 Start Phase A
2016 Consortium Selection for construction
Call for proposal
2017
2018 TRL check
2019 Selection Start if ready
2020
2021
2022
2023
2024
Pre-studies taking the form of phase A or delta-phase A work and/or ESO-fundedEnabling Technology Development (ETD)
Decision point
We intend to sign 4 contracts for instrument
construction in 2015
➢ MICADO MCAO camera
➢ MAORY MCAO system
➢ HARMONI IFU spectrometer + LTAO system(PDR)
➢ METIS thermal IR imager & spectrometer
Instrument progress
HARMONI (+LTAO)
IFS spectrometer. PI : Niranjan Thatte
Univ of Oxford UK
UK ATC UK
CRAL France
ONERA France
Obs Marseille France
IAC Spain
CSIC Spain
ESO
MICADO
AO-corrected camera. PI: Ric Davies
MPIE Germany
USM Germany
MPIA Germany
IoA Gőttingen Germany
Nova Netherlands
LESIA France
Univ of Vienna & Linz Austria
INAF (Padova) Italy
ESO
METIS
Mid-IR imager & spectrometer. PI: B Brandl
NOVA Netherlands
CEA Saclay France
ETH Switzerland
KU Leuven Belgium
MPIA Germany
UKATC UK
Univ of Vienna Austria
ESO
MAORY
MCAO system for MICADO: Emiliano Diolaitti
INAF/IASF(Bol) Italy
INAF –Padova/Capod./Brera
Italy
UKATC UK
Univ of Durham UK
IPAG France
ESO
Base-line 39m E-ELT design to be kept➢No need for further technical or programmatic reviews
➢Essentially no scope for overall reduction in cost• All such options exercised by going from 42m to 39m design
Divide construction into two phases➢Phase 1 affordable without Brazil as MS
• Provides working 39m E-ELT with limited instrumentation
• Scientifically world-leading and programmatically feasible
• Council to authorize major spending in Dec 2014
➢Phase 2 should be possible at any time• Components could be approved when funding would allow it
• Would be reinstated in toto as soon as Brazil joins
The two-phase approach
27
KO
Foundations
Acceptance Dome Acceptance MS
Design
Manufacture
Assembly
Complete
M1 Blanks
M1 Polishing
M2 Blank
M2 Mirror and Cell
M3 Mirror and Cell
M3 Blank
M4
M5/PFS/Lasers
Road and Platform
ARM/PAR Facilities
Mirror Facilities 1st LightMirror Coating and Assembly
Integration and Alignment
Commissioning
E-ELT Construction Schedule & Critical Path
M1 Segment Supports
Cryogenics
Optics
Vacuum
Precision mechanics (also cryogenics)
Deformable mirrors
Stiff, light structures
Imaging detectors
Low-noise electronics
Real-time computing
Control systems and software
Technologies
29
HO deformable mirror systems
crucial for ELT instrumentation
➢ Currently in a very difficult situation
➢ MCAO. 2000 actuators.
➢ PCS (Epics). >20,000 actuators
➢ Open-loop DMs
VLT AO instruments envisioned
➢ MCAO
➢ Extension to optical range
SPHERE DM
First Light at OT, 21.1.2015
dbonacci@eso.org
589nm Na Laser testing ongoing
Brightness of artificial star
Seasonal variations
Variations with earths field angle
Pumping of satellite lines
Preliminary Design Review for the M1 Local Control System (LCS) PDR passed successfully end of 2014
➢Supported by prototyping activities
ELT Engineering
✓Contracts signed by CESA (Spain) and VDL-TNO (NL) for final
design. One to be selected for construction.
✓Kick-off-Meetings held with VDL (26 Jan), and with CESA (10 Feb)
M1 Segment Support
CESA proposed concept VDL-TNO proposed concept
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