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MeerKAT DBE Past Present Future

MeerKAT DBE Past Present Future. Alan Langman. 28 September 2009. Overview. Objectives of MeerKAT MeerKAT Phase XDM KAT-7 ROACH/ katADC Fringe Finder MeerKAT Conclusions. Objectives of MeerKAT. Build a world class radio telescope (up to 80 dishes)

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MeerKAT DBE Past Present Future

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  1. MeerKAT DBEPast Present Future Alan Langman 28 September 2009

  2. Overview • Objectives of MeerKAT • MeerKAT Phase • XDM • KAT-7 • ROACH/katADC • Fringe Finder • MeerKAT • Conclusions

  3. Objectives of MeerKAT • Build a world class radio telescope (up to 80 dishes) • Choose a frequency range that is likely to have high science impact. • Commission a 7 dish system from end of 2010, engineering risk mitigation and do some early science. • Train a new generation of scientists and engineers who are capable to participate in large international projects, such as the SKA. • Provide an excellent facility for local and international scientists. • Implement mission-driven innovation to mobilise industry, academia and research fraternity. • SKA pathfinder (precursor)

  4. Definitions

  5. KAT element MeerKAT

  6. SKA-SA: MeerKAT Phases • XDM (Done) • Single Antenna HARTRAO • (PED) • KAT7 (7 antennas Karoo) • Fringe Finder • Phase 1 • KAT7 • Optimization/Learning?? • MeerKAT (80 Antennas Karoo)

  7. eXperimentalDeMonstrator

  8. Requirements • Initially FPA/Multiple Feed (7 feeds) • Spectrometer • 256MHz bandwidth • 2K channels • Minimum 100us dump time • Radiometer • Histogram

  9. XDM: Plan A Relax Component Placement Focus gateware and firmware on XDM Requirements ATX12 Power

  10. XDM: Plan B

  11. First Casper Solution

  12. XDM Results

  13. meerKAT-7

  14. Key Requirements • Input signal • 72->328MHz, -27dBm (max 0dBm), NF=40dB • Correlator/Beamformer • a) 1 band with total bandwidth >= 256MHz covering the whole input frequency range, with equi-spaced channels of at least 1 MHz bandwidth each • (b) 1 (goal 2 or 4) bands with total bandwidth >= 3.5 MHz selected from anywhere in the input frequency range, with equi-spaced channels of <= 10.7 kHz bandwidth each • (c) 1 (goal 2 or 4) bands with total bandwidth >= 580 kHz selected from anywhere in the input frequency range, with equi-spaced channels of <= 530 Hz bandwidth each

  15. KAT-7 Block Diagram

  16. Key Component ROACH

  17. katADC (production)

  18. katADC Prelim results

  19. Mechanical Enclosure

  20. Detailed Design

  21. Key Component ROACH

  22. Production (always fun)

  23. Stress testing tool chain Million channels, 512MHz BW, Single ROACH

  24. Fringe Finder -Risk Mitigation • Fringe Finder (same base specs as KAT-7) – End of 2009 • Single baseline dual polarized correlator • Quad baseline single polarization correlator. • 100ms dump time.

  25. Physical Solution

  26. FF Signal Flow

  27. Yet another PoCo

  28. Towards KAT-7 (Casper Collab)

  29. MeerKAT Key Specs

  30. MeerKAT Phasing

  31. MeerKAT Phasing

  32. Block Diagram

  33. Key Challenges • Digitization – Feed, Back Dish , Pedestal or correlator room • Distributed correlator architecture • Timing and synchronization • Array Process/Backend Processor

  34. Conclusions • Road to MeerKAT • XDM • KAT-7 • ROACH development • Fringe Finder Risk Mitigation • MeerKAT challenge

  35. Questions?

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