a global approach to elt instrument developments j.-g. cuby for the french elt wg
TRANSCRIPT
A global approach to ELT instrument developments
J.-G. Cuby
for the French ELT WG
FP7
• “The construction of an Extremely Large Telescope on a competitive time scale will be addressed by radical strategic planning…” (Council resolution)
Calls for a schedule compatible with other projects, TMT, GMT, ALMA, JWST, etc.– Assume 2016
Calls for forefront instrumentation– Key to science, e.g. the VLT success
• Reverse schedule:
• FP7 (2008-2012) in parallel with the instrument study
• No time left for generic studies for the first generation instruments
First / Main instruments need to be started NOW (2-4 years of demonstration)
ELT Instruments: timeline
A key word: demonstration• Some concepts for workhorse ELT instruments remain to be demonstrated
– E.g. MOAO, XAO instruments
• Demonstration requires focused and integrated studies at system level– Science
• Top Level Requirements, Simulations, Simulators, Data Reduction, etc.– Adaptive Optics
• TLRs, Simulations feeding science, AO system analysis, tests on existing systems, etc.– Instrumentation
• TLRs, concepts, interfaces with AO, at least 2 prototyping cycles, etc.– System
• Putting it all together, budgets, etc.– Demonstrators, either in lab (e.g. AO benches) or on-sky (e.g. VLT)
• Synergy with transverse AO developments– Requirements– Interfaces
• Synergy with telescope developments– Interfaces: focal plane, f ratio, back focal distance, platforms, ADCs, field of view
(scientific & technical), LGS, etc.
A key word: demonstration
• Demonstration by:– Study (simulations, concepts, etc.)– Prototypes– Demonstrators (benches, on-sky, etc.)
• Demonstrations on existing infrastructures (e.g. VLT) for the next infrastructures– Develop new demonstrators in lab or on sky– Use existing or planned instruments as demonstrators (e.g. SPHERE)
• Structuring activity– Teams with various competence, etc– Access to lab, possibly sky, demonstrators– Networks highly desirable, e.g. for the science activities
• FP7: ideal for the demonstration phase – until instrument FDR (~ 2012)– JRAs, networks, access (to demonstrators)
Examples
• WFSPEC, MOMFIS etc.– ‘High-z’ and mass assembly of
galaxies
• Complex
• To be demonstrated (MOAO)
• Major interface aspects with telescope and AO, etc.
ExamplesMOMFISWFSPEC
WBS for theInstrumentstudy
Demonstrators
Example: MOMFIS / WFSPEC demonstration
• Potential Participants: F, UK, I, tbd.
• Timescale: 2008-2012 for the bulk of the activities
• Cost: ~ 8 M€ all inclusive (included in N. Hubin’s presentation)
• Deliverables: reports, conceptual studies, several prototypes (hw & sw), Demonstrators (1 bench, 1 VLT)
• Industrial dimension: interest in short term applied R&D
• EU dimension: use of existing infrastructures, demonstration for future infrastructures, structuring activity, synergy with ELT Design Study
EPICS
A Planet Finder instrument for the
European ELT
(slides from J.-L. Beuzit)
EPICS Design philosophyEPICS Design philosophy
General approach -> Integrated conceptGeneral approach -> Integrated concept Science-driven: detection of exoplanetsScience-driven: detection of exoplanets Very detailed system analysisVery detailed system analysis Lessons learned from SPHERE on VLT (as Lessons learned from SPHERE on VLT (as
demonstrator)demonstrator) Globally optimized instrument (AO, corono, focal WFS Globally optimized instrument (AO, corono, focal WFS
control, observing modes)control, observing modes) Open concept, explore several options (corono, IFS...)Open concept, explore several options (corono, IFS...) Settle on well-established competences distributed in Settle on well-established competences distributed in
the XAO communitythe XAO community Extensive simulations -> end-to-end model Extensive simulations -> end-to-end model Prototyping, validations, test benches, demosntratorPrototyping, validations, test benches, demosntrator
EPICS Design StrategyEPICS Design Strategy
Spatially Filtered
SH
Advanced PYR
Experiments Simulations
FP6Point designSimulations experiments
EPICS SystemDimensioning
Prototypes
Conceptual& Preliminary
Design Reviews
HOT extension Aggressive
Calibration &Post-processing
Active suppressionof Systematic
specklesTheory
SPHEREfeedback
Conclusions• FP7 to support the design phase of E-ELT instruments in period
2008-2012 (JRAs, network & access)
• Global approach to instrument developments highly desirable– Better focus, better synergy– Allows smaller (integrated) teams– Higher efficiency, faster
• Structuring activity
• Not exclusive of transverse / generic activities– Activities in essence transverse, e.g. detectors, etc.– Upfront activities with longer development timescales
• Synergy with ELT DS– Instrumentation currently severely under funded
• Which call ? Preparatory phase or I3 ?