EUCLID NEAR IR SPECTROGRAPH FOCAL PLANE ENIS FOCAL PLANE EUCLID NEAR IR SPECTROGRAPH FOCAL PLANE People: F. Bortoletto (OAPD) V. DeCaprio (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

ENIS FOCAL PLANE EUCLID MISSION Cosmology Medium-class mission in the ESA’s ‘Cosmic Vision’ program High-precision survey mission: centered on Weak Lensing and BAO L2 Orbit 4-5 year mission Passively cooled Telescope: 1.2 m Korsh • Instruments: Visible imaging channel: 0.5 deg2, 0.10 ’’/pixel, 0.23’’ PSF FWHM, broad band R+I+Z (0.55-0.92µ), CCD detectors, galaxy shapes NIR photometry channel: 0.5 deg2, 0.3 ’’/pixel, 3bands Y,J,H (1.0-1.7µ), HgCdTe detectors, photometric Z NIR Spectroscopic channel: 0.5 deg2, R=200-600, baseline: slitless (0.8-2.0µ), option: multi-object (0.9-1.7µ) Digital-Micro-Devices (DMD) based, redshifts Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE EUCLID MISSION Euclid will survey the entire extra galactic sky (20 000 deg2) to simultaneously measure its two principal dark energy probes: 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) 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 ENIS FOCAL PLANE ENIS: Slitless Spectrograph Option Input Tel. Beam To FP 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

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

ENIS FOCAL PLANE Focal planes will be constructed making use of the forthcoming generation of 2048x2048 H2RG detectors with MBE processed MeCdTe sensitive layer (2.5 µ cut-off) and SiC 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 ENIS FOCAL PLANE ENIS SLITLESS FOCAL PLANE ‘slitless’ mode FP mechanics: H2RG mosaic is mounted and aligned on a SiC thermally controlled frame 228x148x61 mm TOT. MASS + 20% Cont. : 5700 Gr Readout ASICs can stay @ higher temperature Munich 16/10/09 ENIS Focal Plane

ENIS DMD FOCAL PLANE ‘DMD’ mode FP mechanics: 1 from 4 ENIS FOCAL PLANE ENIS DMD FOCAL PLANE ‘DMD’ mode FP mechanics: 1 from 4 same concept as for ‘slitless’ mode. 140x95x70 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 L2 for 0-300 Mev Protons. Present mechanical design is compatible with shielding requirements. Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE THERMAL Temperature requirements derived from background radiometry: ‘slitless’ backgrounds System: Nominal Temperature : Long Term Stability : H2RG Detector 80 Kº < 10 m Kº (500 Sec) H2RG Housing 75 Kº < 2 Kº (annual) SIDECARs 75 or 150 Kº < 2 Kº “ SPW Adapters 150 Kº Spectrograph Optical Bench Telescope M1 < 200 Kº TBD ‘DMD’ backgrounds Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE THERMAL 150 K 80 K 77 K 75 K 80 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: Groups: NDROs: RON e- RMS : Buffer Gbytes: 15 2 6.2 Sampling in continuous non-destructive readout (NDRO) mode illustrated for a single H2RG cell and results for a 15 e- single CDS device. Groups: NDROs: RON e- RMS : Buffer Gbytes: 20 2 5.5 2.7 Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE READOUT Expected CR rates are 5÷30 events/Sec/Cm2 I.E. 4÷25% of FP pixels @ 500 Sec exposure and with 5 pixels/CR Simulation with 5÷30 events/Sec/Cm2 About 15÷20 UTR Groups needed to correct Munich 16/10/09 ENIS Focal Plane

ENIS FOCAL PLANE CONTROL MODE : A B C 1x 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 2.1x2 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 mW 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 ENIS yellowbook already presented IDD document presented (end of September) EUCLID ESA scientific presentation in november Preselection results beginning next year Munich 16/10/09 ENIS Focal Plane