1 / 19

Pharos 2 – Upgraded C-Band PAF

Pharos 2 – Upgraded C-Band PAF. Simon Melhuish, Mike D’Cruze , Keith Grainge, Michael Keith and Mark McCulloch, Jodrell Bank Centre for Astrophysics, Manchester, UK. Origins. FP5 RTD programme FARADAY Jodrell Bank Observatory (JBO ) University of Birmingham

frankieb
Télécharger la présentation

Pharos 2 – Upgraded C-Band PAF

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Pharos 2 – Upgraded C-Band PAF Simon Melhuish, Mike D’Cruze, Keith Grainge, Michael Keith and Mark McCulloch, Jodrell Bank Centre for Astrophysics, Manchester, UK

  2. Origins • FP5 RTD programme FARADAY • Jodrell Bank Observatory (JBO) • University of Birmingham • Istitutodi Radioastronomia (INAF), • Microwave Engineering Centre for Space Applications (MECSA) • Netherlands Foundation for Research in Astronomy (ASTRON) • + others

  3. Pharos block diagram – original design

  4. Pharos – original design • Radome • Perspex • IR Filter • Polystyrene • LNAs • In-house • Beam-former • Analogue

  5. “Pharos2” – Why Upgrade? • Radome noise can be reduced • IR load can be reduced with RT-MLI • LNA state-of-the-art has improved • Old analogue beam-former never fully populated • Performance not so good either

  6. Pharos2 – New Configuration • New radome (NRC) • New IR filter (see e.g. Choi et al.) • New LNF LNAs + Chalmers / LNF bias supply • Italian warm electronics & beam-former (iTPM)

  7. New – IR Filter • Polystyrene foam – “Depron” • Demonstrated improvement over original IR filter • More disks → greater improvement • More disks added since test

  8. New LNAs (LNF-LNC4_8C_2)

  9. New Bias Supply – PSX

  10. Dewar contents old / new

  11. Test Results- Naked elements

  12. Test Results- Analogue beam-former

  13. Test Results - Comparison with old LNAs

  14. Next stepsNew back-end by INAF

  15. Where to Put It? • Original plan • Lovell Telescope, 76 m • Suggested • Noto, 32 m • Final • 25-m Merlin telescope at Pickmere

  16. New Location

  17. Installation into Focus Box

  18. Next stepsObservations • During EVN session 3 • October / November 2019 • Crane is booked!

  19. What then (in 2020)? • Replace the radome • Re-measure Tsys • Replace Vivaldi array • S-band prototype (later talk) • S-band LNF LNAs • INAF back-end covers S-band

More Related