EUCLID NEAR IR SPECTROGRAPH FOCAL PLANE People F

EUCLID NEAR IR SPECTROGRAPH FOCAL PLANE People: F. Bortoletto (OAPD) V. De. Caprio (OAMI) E. Giro (OAPD) L. Corcione (OATO) C. Bonoli (OAPD) S. Ligori (OATO) M. D’Alessandro (OAPD) G. Morgante (IASFBO) Munich 16/10/09 ENIS Focal Plane

EUCLID MISSION Ø Ø Ø Cosmology Medium-class mission in the ESA’s ‘Cosmic Vision’ program High-precision survey mission: centered on Weak Lensing and BAO L 2 Orbit 4 -5 year mission Passively cooled Telescope: 1. 2 m Korsh • Instruments: Visible imaging channel: 0. 5 deg 2, 0. 10 ’’/pixel, 0. 23’’ PSF FWHM, broad band R+I+Z (0. 55 -0. 92µ), CCD detectors, galaxy shapes Ø NIR photometry channel: 0. 5 deg 2, 0. 3 ’’/pixel, 3 bands Y, J, H (1. 0 -1. 7µ), Hg. Cd. Te detectors, photometric Z Ø NIR Spectroscopic channel: 0. 5 deg 2, R=200 -600, baseline: slitless (0. 82. 0µ), option: multi-object (0. 9 -1. 7µ) Digital-Micro-Devices (DMD) based, redshifts Ø Munich 16/10/09 ENIS Focal Plane

EUCLID MISSION Euclid will survey the entire extra galactic sky (20 000 deg 2) to simultaneously measure its two principal dark energy probes: l Weak lensing: • Diffraction limited galaxy shape measurements in one broad visible band (R+I+Z) up to 24. 5 ABmag • Photometric Z measurements in 3 NIR bands (Y, J, H) up to 24 ABmag (H) l Baryonic Acoustic Oscillations: • Spectroscopic Z survey for 33% of all galaxies brighter than 22 ABmag (H) Munich 16/10/09 ENIS Focal Plane

ENIS: Slitless Spectrograph Option Telescope beam is collected at an intermediate instrument position, hits the pick-off mirror (in grey), passes through a couple of corrector lenses (blue), then is directed to the collimating parabola by a flat folder. The same folder, after collimation, projects the beam to the removable disperser. Light is then refocused onto the NIR focal plane array by a four lenses f# 6. 8 camera. Munich 16/10/09 ENIS Focal Plane Input Tel. Beam To FP

ENIS: DMD Spectrograph Option Digital Micromirror Device at the f# 3 intermediate focal plane Input Tel. Beam Munich 16/10/09 ENIS Focal Plane

ENIS: Slitless and DMD Focal Planes ‘slitless’ mode FPA Munich 16/10/09 ENIS Focal Plane ‘DMD’ mode field is split at the pick-off optics in four independent channels

ENIS FOCAL PLANE Focal planes will be constructed making use of the forthcoming generation of 2048 x 2048 H 2 RG detectors with MBE processed Me. Cd. Te sensitive layer (2. 5 µ cut-off) and Si. C mechanical substrate. Readout electronics is based on the forthcoming 32 ch. SIDECAR ASIC mounted in CGA technology. Munich 16/10/09 ENIS Focal Plane

ENIS SLITLESS FOCAL PLANE ‘slitless’ mode FP mechanics: H 2 RG mosaic is mounted and aligned on a Si. C thermally controlled frame 228 x 148 x 61 mm TOT. MASS + 20% Cont. : 5700 Gr Munich 16/10/09 ENIS Focal Plane Readout ASICs can stay @ higher temperature

ENIS DMD FOCAL PLANE ‘DMD’ mode FP mechanics: 1 from 4 same concept as for ‘slitless’ mode. 140 x 95 x 70 mm Readout ASICs directly mounted in the housing back-cover to save space TOT. MASS + 20% Cont. : 3800 Gr Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE Extrapolated solar activity for the Euclid launch date. Preliminary Montecarlo simulations have been done considering the average fluence in L 2 for 0 -300 Mev Protons. Present mechanical design is compatible with shielding requirements. Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE THERMAL System: Temperature requirements derived from background radiometry: ‘slitless’ Nominal Long Term backgrounds Temperature : Stability : H 2 RG Detector 80 Kº < 10 m Kº (500 Sec) H 2 RG Housing 75 Kº < 2 Kº (annual) SIDECARs 75 or 150 Kº < 2 Kº “ SPW Adapters 150 Kº < 2 Kº “ Spectrograph 150 Kº < 2 Kº “ Optical Bench 150 Kº < 2 Kº “ Telescope M 1 < 200 Kº TBD Munich 16/10/09 ‘DMD’ backgrounds ENIS Focal Plane

ENIS FOCAL PLANE THERMAL 150 K 80 K 77 K 75 K Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE READOUT Achievement of RON requirements and CRs deglitching possibility require a readout strategy based on multiple-readouts: Sampling in continuous non-destructive readout (NDRO) mode illustrated for a single H 2 RG cell and results for a 15 e- single CDS device. Munich 16/10/09 ENIS Focal Plane Groups: NDROs: RON e. RMS : Buffer Gbytes: 15 2 6. 2 2 Groups: NDROs: RON e. RMS : Buffer Gbytes: 20 2 5. 5 2. 7

ENIS FOCAL PLANE READOUT Expected CR rates are 5÷ 30 events/Sec/Cm 2 I. E. 4÷ 25% of FP pixels @ 500 Sec exposure and with 5 pixels/CR Simulation with 5÷ 30 events/Sec/Cm 2 About 15÷ 20 UTR Groups needed to correct Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE CONTROL MODE : A B C 1 x FP = 67. 1 Mbytes CR removed on the live data stream: CR removed after UTRs stored on dual buffered memory: CR detected after UTRs stored on dual buffered memory. Affected pixels UTRs + good pixels downloaded: TOTAL frames needed: 10 (FP fit parameters) 15*2+2 (FP images) TOTAL Work/Buffer Memory Needed: 671 Mbytes 2. 1 x 2 Gbytes (dual buffered) Processing Speed: 25. 4 Mflop/Sec 14. 5/16. 6 Mflop/Sec 14 Mflop/Sec TOTAL Bytes to download: 67. 1 Mbytes 114 Mbytes @ 5% CR 302 Mbytes @ 25% CR TOTAL per Day Telemetry : 93 Gbaud 158 Gbaud @ 5% CR 418 Gbaud @ 25% CR Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE CONTROL Space Wire (SPW) communication architecture makes the FP electronics exactly compatible between the two configurations: slitless and DMD: 150 ºK 150 -75 ºK 80 -100 ºK 150 -75 ºK 150 ºK ENIS FP REQUIRED POWER + 20% CONTINGENCY: 5100 m. W Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE CONTROL Two redundant processing systems: • DAPU, data processing (averaging, deglitching) • ICU, Controls & Data Handling (compression) Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE CONCLUSIONS Ø ENIS yellowbook already presented Ø IDD document presented (end of September) Ø EUCLID ESA scientific presentation in november Ø Preselection results beginning next year Munich 16/10/09 ENIS Focal Plane