A global approach to elt instrument developments
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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

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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


A global approach to elt instrument developments

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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