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A global approach to ELT instrument developments. J.-G. Cuby for the French ELT WG. FP7 . ELT Instruments: timeline.

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a global approach to elt instrument developments

A global approach to ELT instrument developments

J.-G. Cuby

for the French ELT WG

elt instruments timeline

FP7

ELT Instruments: timeline
  • “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)
a key word demonstration
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 demonstration1
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
Examples
  • WFSPEC, MOMFIS etc.
    • ‘High-z’ and mass assembly of galaxies
  • Complex
  • To be demonstrated (MOAO)
  • Major interface aspects with telescope and AO, etc.
examples1

Demonstrators

MOMFIS

WFSPEC

WBS for the

Instrument

study

Examples
example momfis wfspec demonstration
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
slide8

EPICS

A Planet Finder instrument for the European ELT

(slides from J.-L. Beuzit)

epics design philosophy
EPICS Design philosophy

General approach -> Integrated concept

  • Science-driven: detection of exoplanets
  • Very detailed system analysis
  • Lessons learned from SPHERE on VLT (as demonstrator)
  • Globally optimized instrument (AO, corono, focal WFS control, observing modes)
  • Open concept, explore several options (corono, IFS...)
  • Settle on well-established competences distributed in the XAO community
  • Extensive simulations -> end-to-end model
  • Prototyping, validations, test benches, demosntrator
epics design strategy
EPICS Design Strategy

Prototypes

HOT

extension

Aggressive

Calibration &

Post-processing

Spatially

Filtered

SH

FP6

Point design

Simulations

experiments

EPICS System

Dimensioning

Experiments

Simulations

Advanced

PYR

Active suppression

of Systematic

speckles

Theory

SPHERE

feedback

Conceptual

& Preliminary

Design Reviews

conclusions
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 ?
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