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EddiCam: The Eddington Photometric Camera

EddiCam: The Eddington Photometric Camera. Preliminary design. Eddicam. EddiCam design drivers Integration times: 0.5 to 30 s Number of stars to be monitored simultaneously: up to few times 10 5 White light (TBC!!) Duty cycle: > 90%

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EddiCam: The Eddington Photometric Camera

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  1. EddiCam: The Eddington Photometric Camera Preliminary design . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  2. Eddicam • EddiCam design drivers • Integration times: 0.5 to 30 s • Number of stars to be monitored simultaneously: up to few times 105 • White light (TBC!!) • Duty cycle: > 90% • High photometric accuracy. Noise induced by random perturbations (readout noise, jitter, thermoelastic stability, CCD thermal stability,....): < photon noise. . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  3. Eddicam • Preliminary baseline design • Ø 3° field of view (1.5° x 3° effective FOV in asteroseismology mode) • 20 CCD mosaic • broad band (4000-9000 Å) coverage (white light) . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  4. Eddicam . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  5. Eddicam EddiCam location . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  6. Eddicam • EddiCam components • Focal Plane Assembly: • CCDs array • FEE • Frame store buffer covers • Calibration LEDs • Shutter/cover • Thermal control subsystem . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  7. Eddicam • CCD baseline characteristics • Format: 740 x 2900 pixels • Pixel size: 27 x 27 µm2 • Chip size: 20 x 80 mm2 • Full well capacity: 1.6 Me- • Minimum line readout time: 13 µs • Frame transfer time: 20 ms • Readout noise: 10 - 15 e- at 0.5 MHz • Operational temperature: -80 / -100 C . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  8. Eddicam CCD read out noise as a function of readout frequency . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  9. Eddicam • CCD array preliminary design • 16 + 4 CCDs covering the full FOV • CCDs working in frame transfer mode for asteroseismology (short integrations on bright stars) • CCDs working in full frame mode for planet finding(long integrations on weaker stars) . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  10. Eddicam Frame transfer covers Filters Planet finding CCD layout Asteroseismology layout . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  11. Eddicam • CCD mosaic proposed by Marconi: • 20 CCDs on individual INVAR packages • Each CCD individually mounted on a large INVAR baseplate • All CCDs within ±10 µm from the baseplate: no individual focussing required • Flatness variation < 3 µm from +20 to -100 C • Butting gap around 500 µm . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  12. Eddicam Prototype of CCD array proposed by Marconi . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  13. Eddicam Detail of individual CCD chip package . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  14. Eddicam Detail of XMM-EPIC 7 CCD mosaic . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  15. Eddicam . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  16. Eddicam . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  17. Eddicam . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  18. Eddicam • Wheel with 3 positions: • closed • open • dispersive element • Proably feasible, but expensive...... . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  19. Eddicam • CCD Control Unit • Integration time control • Full frame/transfer frame operation • CCDs windowing • CCDs binning • Selection of readout ports and speeds • Generation of CCDs clocks, bias and power supply • Read Out Electronics • CCD readout • Digitization • Data transmission to Data Processing Unit Simultaneously for 20 CCDs with 40 Mpixels . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  20. Eddicam • Data Processing Electronics • Telecommand management of EddiCam • Scientific onboard data processing (heavy!!) • Generation of TM and communications with OBDH • Power conditioning electronics • Conditioned power supply to CCU, FEE and ROE (very stable and low noise!) • Power supply for shutter, LEDs and covers . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  21. Eddicam . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  22. Eddicam • Preliminar budgets . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  23. Eddicam • The EddiCam Definition Working Group Centro de Astrobiología — Instituto Nacional de Técnica Aeroespacial Centre Spatial de Liège + Universite de Liège Deutsches Zentrum für Luft und Raumfahrt (DLR-Berlin) Institute of Space Sensor Technology and Planetary Exploration Instituto de Astrofísica de Andalucía + Instituto de Astrofísica de Canarias Leicester University + Mullard Space Sciences Laboratory (London) Observatoire de Paris + DAPNIA / CEA (Saclay) Universität Wien . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  24. Eddicam . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  25. Eddicam • EddiCam Definition Phase milestones • Mid July 2001: Official answer from ESA to the LoI. • September 2001: Telescope studies kick-off ==> interaction between Telescope and EddiCam • Summer - fall 2002: end of telescope, CCDs and mission studies. • End of 2002: EddiCam preliminary design and system specifications • Spring 2003: preliminary requirements review (PRR)==> start of Phase B launch in 2007/08!! . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

  26. Eddicam . Córdoba, June 14th, 2001 J. Miguel Mas-Hesse

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