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

1st Eddington Workshop. 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 10 5 –White light (TBC!!) –Duty cycle: > 90% –High photometric accuracy. Noise induced by random perturbations (readout noise, jitter, thermoelastic stability, CCD thermal stability,....): < photon noise.

1st Eddington Workshop. 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 ( Å) coverage (white light)

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 4 Eddicam

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 5 Eddicam EddiCam location

1st Eddington Workshop. 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

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 7 Eddicam CCD baseline characteristics –Format: 740 x 2900 pixels –Pixel size: 27 x 27 µm 2 –Chip size: 20 x 80 mm 2 –Full well capacity: 1.6 Me - –Minimum line readout time: 13 µs –Frame transfer time: 20 ms –Readout noise: e - at 0.5 MHz –Operational temperature:-80 / -100 C

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 8 Eddicam CCD read out noise as a function of readout frequency

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 9 Eddicam CCD array preliminary design – 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)

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 10 Eddicam Planet finding CCD layout Asteroseismology layout Filters Frame transfer covers

1st Eddington Workshop. 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

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 12 Eddicam Prototype of CCD array proposed by Marconi

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 13 Eddicam Detail of individual CCD chip package

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 14 Eddicam Detail of XMM-EPIC 7 CCD mosaic

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 15 Eddicam

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 16 Eddicam

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 17 Eddicam

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 18 Eddicam Wheel with 3 positions: closed open dispersive element Proably feasible, but expensive......

1st Eddington Workshop. 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

1st Eddington Workshop. 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

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 21 Eddicam

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 22 Eddicam Preliminar budgets

1st Eddington Workshop. 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

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 24 Eddicam

1st Eddington Workshop. 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!!

1st Eddington Workshop. Córdoba, June 14th, 2001 J. Miguel Mas-Hesse 26 Eddicam