Download - 1 E-ELT Programme status - 18th Nov 2015
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E-ELTLargest optical/infrared telescope in the world39m segmented primary mirror: transformational step Science: exo-earths, deep universe, resolved populations Design essentially complete, incl. instrumentation roadmap
ProjectConstruction 2014-2024, on Cerro Armazones
• As integral part of the Paranal Observatory (‘one more telescope’)ESO cost: ~1125 MEUR incl. instruments and contingency
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Science driversPlanets in other stellar systems Imaging and spectroscopy The quest for Earth-like exo-planets
Stellar populations In galaxies inaccessible today
(e.g. ellipticals in Virgo cluster)
Across the whole history (i.e. extent) of the Universe
Cosmology The first stars/galaxies, closer to Big Bang Direct measure of deceleration Evolution of cosmic parameters Dark matter, dark energy Tests of GR around black holes
The unknown Open new parameter space
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One top goal of the E-ELT is to find and to characterise exo-planets...
... it is the first telescope ever that can explore Earth-twins...
... with ultimately the chance to find life beyond the Solar system.
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Spectacular Resolution
HST
VLT+AO
E-ELT
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To put it in perspective…
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To put it in perspective…
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E-ELT Overview Description
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E-ELT Organigram
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Armazones and Paranal
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25 km
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Site definition
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Particularities: Altitude: 3046 m (Platform)c.a. 360 nights clear skyVery stable atmospheric and weather conditions
with rare (typ. 1-2/year) and short-duration storms in Winter associated with low temperature (down to typ. -10C), unusual rain or snow fall and possibly high windsDryness and UV radiationActive seismic area
Site Environment
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The E-ELT: overviewDome• 2 FEED contracts• Erection sequence
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Telescope foundation and Azimuth tracks
AltitudeStructure
Azimuth Structure
The Main Structure is about2500 tons of steel holding andmoving 700tons of opto-mechanics and electronicsaround two perpendicularaxes (azimuth and altitude)supported on hydrostaticbearings and driven byelectrical direct drive motorswith a precision of 0.3 arcsecunder the maximum winddisturbance.
38 m diameter
71 m width
65 m height
52m diameter
The E-ELT: Main Structure
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The E-ELT: overviewOptical design• 3-mirror anastigmat on axis + 2 flats• diffraction limited over full 10′ FoV• very low LGS wavefront aberrations
Primary Mirror M1
Secondary Mirror M2
Quaternary Mirror M4(adaptive)
Tertiary Mirror M3
Fifth Mirror M5(tip tilt correction)
F/17.5 FocusE-ELT Programme status - 18th Nov 2015 15
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E-ELT Optomechanics
M2 Unit4-mConvex Aspheric f/1.1 Passive + Position Control
M4 Unit2.4-mFlatSegmented (6 petals)Adaptive + Position Control
M5 Unit2.7x2.1-mFlatPassive + Fast Tip/Tilt
M3 Unit4-m – Concave – Aspheric f/2.6Active + Position Control
M1 Unit39-mConcave – Aspheric f/0.9 Segmented (798 Segments)Active + Segment shape Control
LGSU(Laser Guide Star Units)Laser Sources + Laser Beacons shaping and emitting
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The E-ELT: overview39m Primary Mirror• 798 segments mirror +1/family• 2 x 7 prototypes FEEDs• prototype support, PACTs, edge sensors
Prototype segments
The collecting area will be more than the total collective area of today ground based astronomy!
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M1 Unit
39‐m diameter6 x 133 segments (1.4‐m)1 x 133 spare segmentsTotal: 931 segments
M1 MirrorOuter diameter (mm) 39146.0Inner diameter (mm) 9418.4
M1 Optical PrescriptionRadius of curvature (mm) 68685
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M1 Unit931 x M1 Segments931 x Blanks + 19 x Spare Blanks
931 x Segments Polishing
M1 Auxiliary EquipmentAux. Sensors, Mass Dummies. Carts, Stands, Manipulator, Phasing Gun, Alignment Tools
931 x M1 Segment Supports
& SA Auxiliary Equipment[SA Handling Tools, SA Transport Containers,
SA AIV Tools]
2394 x M1 Position Actuators
2394 x Actuators + 798 x Electronics + Spares (16 x PACT – 6 x Controllers)
4530 x M1 Edge Sensors4530 x Sensors +813 x Electronics + Spares
(100 sensors – 15 x controllers)
Segment Assembly
Subcell
Including glass, mechanics, electronics:more than 10 000 components
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M1 Unit – Segment Supports
931 x M1 Segment Supports
1 x M1 SA AIV Tools
3 x M1 SA Handling Tools
798 x M1 SA Transport Containers
798 x M1 Fixed Frames
Segment Support
Fixed Frame
Prototype Segment SupportPrototype Fixed Frame
Prototype Transport Container AIV Tooling Handling Tool
Extraction & Handling
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M1 Unit – Edge Sensors
4630 x M1 Edge Sensors(Including 100 Spares)
813 x Controllers & Electronics(Including 15 Spares) – One for 6
Sensors
Dummy MassesTo equip M1 free edges
For figuring
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M1 Unit – Position Actuators2 Stage actuators – nm precision along 15 mm stroke.
2 Technologies still competing: Hard PACTs (Piezzo) / Soft PACTs (voice coil)
2410 x Position Actuators(Including 16 Spares)
804 x Controllers & Electronics(Including 6 Spares)
3 Channels
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The E-ELT: overview4.1mSecondaryMirror•M2unitFEED,3polishingstudies• Convexshape•Lookingdownward•passiveconcept,withwarpingharnesses• supportedon18points,whiffle tree.• totalstiffnesshasincreased.• passivesecondarysimplifiesthecontrolstrategy
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M2 UnitPassive 4-m f/1.1 convex mirror, highly aspheric (+ warping harness provision)
Axial support: 18 points whiffletree + tripods
Lateral support: 12 tangential struts + fixed lateral and clocking
Positioning system: hexapod with sub-micron accuracy
Earthquake protection: mirror restrainers + load limiters
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The E-ELT: overviewCentraltower• ADCvolume•M3• AdaptiveM4• FieldstabilizationM5
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The E-ELT: overviewADCvolume
M4mirror
M5mirror
M3mirror
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M3 UnitActive 4-m f/2.6 concave mirror, mild aspheric (warping harness shape control)
Axial support: 18 points whiffletree + tripods
Lateral support: 12 tangential struts + fixed lateral and clocking
Positioning system: hexapod with sub-micron accuracy
Earthquake protection: mirror restrainers + load limiters
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M4 Unit2.4-m flat adaptive mirror – 6 thin-shell petals only 1.95mm thick!
~5300 contactless actuators driving the mirror shape at 1 kHz
Preliminary Design Study contract completed
Contracts for Final Design and Manufacturing: awarded
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Laser Guide Star Units
6 +1 Laser Sources(Including 1 Spare)
20/25W Raman Fiber Amplifier6 Laser Beam Projection Subunits‐ Mechanical Structure & enclosure
‐ Beam relay and diagnostics ‐ Launch Telescope‐ Baffle towers
‐ Cooling‐ Control Electronics TNO 20W VLT AOF Launch
Telescope
Local Electronics and Control System
Toptica 20W VLT AOF Laser Source
Auxiliary Equipment(AIV, handling, shipping, testing)
Laser Source Control Electronics
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M5 Unit
M5 Electromechanical Subunit
M5 Local Control System
M5 Auxiliary Equipment [Shipping, Handling, AIV]
Spare Parts
M5 Mirror
Scale 1 Prototype Unit
Prototype Actuator
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Prefocal Station OverviewOpto-mechanical and optical sensing unit mounted on the Nasmyth platform
Distributes the light from the telescope to the instruments on the platform.
Performs optical sensing to support wavefront control of telescope.
Two PFS in total: one per Nasmyth platform
Representative dimensions approximately W5m x D4.75m x H10m
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Prefocal Station
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EAGLE
METIS OPTIMOS/EVE
The E-ELT: instruments overviewInstrumentation• 8instrumentconceptsPhaseAconcluded• 2post‐focalAOmodulesPhaseAconcluded
Possible instruments location
MICADO
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The instruments
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E-ELT Full Programme Schedule
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Procurement Approach
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Basic principle: outsource all what can be efficiently performed by outside partners (industry or institutes) while keeping inside ESO the tasks where ESO has a long and specific experience not readily available outside.
Examples of the first category are: • detailed design, construction and integration of large structures (e.g.
Dome, telescope Main Structure), • high-precision optical mirror production, design, construction and • integration of astronomical science instruments (by consortia of
astronomical institutes). Examples of the second category are:
• specification, design and implementation of telescope control systems, • AIV of high-precision opto-mechanical units, • Maintenance/coating of large mirrors.
Procurement Strategy Principles
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Specify at functional/performance level, rather than at design level;Procure complete system to minimize interface issues and limit ESO resources needed to follow-up contracts;Procure from a vendor no more than what he is experienced, keeping the risk clear;Ensure enough competition (to keep price low);Geographical return;Limit contractors’ on-site involvement to those tasks that local ESO personal cannot do efficiently;Technology Readiness Level (TRL);
Procurement StrategyOther Considerations
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E-ELT - Overall ESO/Industry share
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Procurements - RFI & PI -
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Procurements – CfT-
…and the DMS, with the goal to present it to FC on the 3rd of February 2016
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DMS Call for Tender Planning Site visit 29 January 2014
Release Call for Tender Phase 1 5 May 2014
Bidders Conference 12 June 2014
Deadline questions phase 1 5 January 2015
Closing date phase 1 31 January 2015
Visit to all bidders March 2015
Release Call for Tender Phase 2 15 April 2015
Closing date phase 2 17 July 2015
Release BAFO November 2015
FC Report ready January 2016
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MICADO agreement signed on the 18th Sept (ESO)HARMONI on the 22nd Sept (Oxford)METIS on the 28th Sept (Leiden)MAORY 10th Dec (ESO)Supporting documentation completed: SoW, Tech Specs, Common Requirements, Interface definitions.
MOS and HIRES are next Part of E-ELT construction programme until end of design phase Afterwards, part of Armazones Instrumentation Programme
Instrumentation
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Status of Running Contracts
Overview
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M1Segment Support Final Design and Qualification
VDL/TNO Eindhoven/Delft (The Netherlands)
Contract Signature: 14.12.14
Kick Off: 26.01.15
Last PM(5): 10.06.15
PDR: 02.09.15 (T0+8M) done
CESA Madrid (Spain)
Contract Signature: 14.01.15
Kick Off: 10.02.15
Last PM(3): 13.05.15
PDR: November 2015 (T0+8M) Done
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Final design, manufacturing, integration, testing, integration in Europe, transport to site, reintegration and verification on site by AdOptica (Italy)M4 unit with c.a. 5316 actuators, able to do adaptive optics correction at 1kHz with nanometric precisionContract signed on 19 June 2015
M4 Unit
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Manufacturing of 2 sets of 6 shells (blank, polishing, testing) by REOSC/SAGEM (France)Diameter 2.4m, 1.95mm thick 10nm RMS figuring errorsCompletion in 8 years(First set in 5 years, 2nd set in 8 years)
Contract signed on8 July 2015
M4 Shells
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The Road, Armazones ↔ Paranal
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Finished!
Road and Platform
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Most Recent Activities
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Most Recent Activities
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Most Recent Activities
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Most Recent Activities
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Additional drainage (against flood)
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Most Recent Activities
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Most Recent Activities
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Most Recent Activities
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Most Recent Activities
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Most Recent Activities
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During levelling
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Platform finished
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On-site work
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Platform finished
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