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Update: SKA and PrepSKA Paul Alexander

Update: SKA and PrepSKA Paul Alexander. Overview. Internationally coordinated project has really started – PrepSKA SKA Programme Development Office (SPDO) coordinating development work Three concept specifications defined (Memo 100)

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Update: SKA and PrepSKA Paul Alexander

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  1. Update: SKA and PrepSKAPaul Alexander

  2. Overview • Internationally coordinated project has really started – PrepSKA • SKA Programme Development Office (SPDO) coordinating development work • Three concept specifications defined (Memo 100) • Reference science plan currently being constructed against which concept specifications will be tested • Costed system design by 2012 Q2 (2013 Q2)

  3. Specifications Freq Range Collector Aeff/Tsys Survey Speed m2 K-1 m4 K-2 deg2 70 – 450MHz Sparse AA 4-10,000 3x109 300 – 1000MHz Dense AA 10,000 2 x 1010 @ 800 MHz 0.8 – 10 GHZ 2400 12-15m Dish 10,000 4x107 Wide-band feeds @ 1.4 GHz

  4. Tailoring the AA system 1000 Sparse AA-lo Fully sampled AA-hi Aeff / Tsys (m2 / K) 100 Aeff Tsky Becoming sparse above fAA Sky Brightness Temperature (K) 10000 10 5000 Aeff/Tsys Dishes 800MHz 1 1000 100 500 1000 3000 Frequency (MHz)

  5. Conceptual Configuration Comms links Dishes spread along spiral Core ~5km dia Station Central Processing Facility 180km ~250 Aperture array stations Dishes AA-hi ~2500 Dishes Not to scale! AA-lo

  6. Where are we in the Global Project? • 2020- Operations and science exploitation • 2020 Completion of Phase-2 • 2016-2020 Construction of Phase-2 and Initial science • 2012-2016 Production verification and Phase-1 construction • 2011 Site selection • 2008-2012 Technology development • 2006 Short listing of sites • 2005-2009 Technology research • 2000 Start of global project PrepSKA SKADS

  7. ESFRI • Body set up by European Science Ministers • To develop a strategic roadmap for major Research Infrastructures (RIs) in Europe • Based on international peer-review • RIs must be • Of Pan-European interest • At a mature level • Some projects of global dimension ELT FAIR KM3NET SKA (Global) SPIRAL2

  8. PrepSKA Awarded €5.5M from EC + larger national matching funds • PrepSKA will address the following: • Design of the SKA • SKA location • Legal framework and governance structure for the SKA • Cost-effective mechanisms for SKA procurement • SKA funding • Socio-economic impact of the SKA Will deliver the design and plan for a coordinated funding proposal submission to governments in early 2012.

  9. SKA Global Collaboration

  10. SKA Project organisation FAWG Funding Agencies Working Group SSEC SKA Science & Eng. Committee FAWG Funding Agencies Working Group SSEC SKA Science & Eng. Committee SPDO SKA Project Development Office Director Project Engineer Executive Officer Project Scientist

  11. EC-FP7: PrepSKA System design, Funding Governance, Procurement, Site Selection SKA timeline Phase 2 Complete Site Select Anticipated SKA Funding Decison Reference Design selected SKA Pathfinders Complete Phase 1 complete Preliminary SKA specs External Engineering Review of design Sites short-listed Pathfinder science Early Science SKA mid+low 06|08 | 10 | 12 |14 | 16 | 18 | 20 | Concept Design System Design Phase 1 construction and commissioning Phase 2 construction and commissioning Pathfinder Suite Construction Target cost for Phases 1 & 2: €1.5B AAVP

  12. Global Collector R&D USA Canada S.Africa NL Australia EMBRACE+2PAD

  13. SKA Technology Work Package Structure (ISPO)

  14. Aperture Array Verification ProgrammeAAVP 2009-2012 • Coordination of the European technical work, primarily for the aperture arrays; • Ensure that the verification programme for aperture arrays meets the requirements of the SKA Project; • Provides a focus and information exchange for European SKA development work

  15. AAVP Principle Deliverables 1. Approved and verified design for Phase 1 AA integrated into the SKA-P1 system. 2. Clear development path to SKA Phase 2 AA system. A design provided with ‘Request for Quotation’ documents with substantial technical detail for industrial competitive selection and delivery of pre-production parts. These parts are expected to integrated within 2 years after funding availability (assumed coincident with PrepSKA end); Design performance verification in the form of independently refereed documentation

  16. AAVP Organisation Chart ESKAC + EU-PrepSKA PI’s (the ‘Board’) SSEC SPDO AAVP Team Programme - Coordinator Engineer System Engineer Scientist Director & PE Domain Leaders AA-SDS UK System design studies with close connection to the requirements to meet the science goals. Inc. simulations, costing & processing requirements. AA-SEM Portugal Provide a site, infrastructure and power for a representative site, including solar power. Assist with detailed testing of AAs installed. DAAVS UK Build, test & calibrate an all digital AA. On a representative site. Use 2-PAD & derivatives for ongoing test and development. A3IV ASTRON Build and test astronomically capable AA. Use EMBRACE & derivatives for ongoing test and development. AA-Lo INAF/IRA Development of the low frequency specific AA components. Most sub-systems will be re-used from AA-hi. Use lessons learned from activities in LOFAR and other LF Arrays. AA-Tech ASTRON The development programmes for the AA sub-systems. The technology developed here are used in the demonstrators.

  17. Calib- ration One Generic Aperture Array….. …. …. …. Dual Pol Antennas 1 2 n 1 2 n 1 2 n ….. Wideband RF Beamformer 1 Wideband RF Beamformer 2 Wideband RF Beamformer m b, Dual Pol Beam(s) Defined Interface 1 PWR PWR PWR 2 Digitisation Digitisation Digitisation p ….. ….. Signal Processing Beamformer Control & Monitor .. Tile processing Board: m channels RFI Shield ….. ….. Control System Station processing & Control & Monitor Time standard Output Data Time Standard Control Information

  18. AA-Tech Lead PrepSKA WP2. mapping: Antenna elements and array design Development of the antenna element, mechanical integration, matching with LNA and testing UK & NL 5.2 LNA and Matching LNA design, differential, packaging. Works closely with element and array design. NL 6.1 RF Beamforming & analogue transport RF beamforming development, analogue input to the RFI shield bunker and input signal cond. France 3.4 Digital processing Hardware Digital processor implementations and trade-offs. UK 8.1 Beamforming Algorithms Software algorithm, development and implementation NL 8.1 Calibration Hardware & implementation Hardware required, methodology and algorithms 8.1/ 3.4 UK Mechanical infrastructure Structural, materials, production engineering, RFI performance. MTBF and MTTR analysis Italy 3.4

  19. The Technology Programme UK contribution to core SKA technology Theme A Contribute to development of AA technology for use in the SKA (following on from SKADS) Theme B

  20. Workpackages & Tasks Task A.1 .1 Cost and design tool .2 AA cost modelling & design coord .3 Real time control & monitoring .4 System simulation A.2 .1 Data Links .2 Phase transfer A.3 .1 Signal processing A.4 .1 Fourier-plane processing .2 Calibration & image-plane effects .3 Algorithms for transient detection .4 Data management, data flow .5 Eff. imaging algorithms & parall’n Task B.1 .1 Mid-Frequency Array .2 Low frequency Array B.2 .1 LNAs and element matching .2 InP LNA development .3 Gain, filtering and equalization .4 Analogue signal transport .5 Digitization B.3 .1 AA infrastructure B.4 .1 Calibration for the AA B.5 .1 UK Contribution to the AAVP

  21. Conclusion • Three aspects of proposedUK strategy • eMERLIN – world-leading science now • LOFAR – exceptional low-frequency pathfinder science soon • Final goal – transformational science with the SKA

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