EUCLID NEAR IR SPECTROGRAPH FOCAL PLANE

Munich 16/10/09Munich 16/10/09 ENIS Focal PlaneENIS Focal Plane

EUCLID NEAR IR EUCLID NEAR IR SPECTROGRAPHSPECTROGRAPH

FOCAL PLANEFOCAL PLANE

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)

People:


EUCLID MISSIONEUCLID MISSION

Cosmology Medium-class mission in the ESA’s ‘Cosmic Vision’ programCosmology Medium-class mission in the ESA’s ‘Cosmic Vision’ program High-precision survey mission: centered on Weak Lensing and BAOHigh-precision survey mission: centered on Weak Lensing and BAO L2 OrbitL2 Orbit 4-5 year mission4-5 year mission Passively cooledPassively cooled Telescope: 1.2 m KorshTelescope: 1.2 m Korsh

• • Instruments:Instruments:

Visible imaging channel: 0.5 degVisible imaging channel: 0.5 deg22, 0.10 ’’/pixel, 0.23’’ PSF FWHM, broad , 0.10 ’’/pixel, 0.23’’ PSF FWHM, broad band R+I+Z (0.55-0.92band R+I+Z (0.55-0.92µµ), CCD detectors, ), CCD detectors, galaxy shapesgalaxy shapes

NIR photometry channel: 0.5 degNIR photometry channel: 0.5 deg22, 0.3 ’’/pixel, 3bands Y,J,H (1.0-1.7, 0.3 ’’/pixel, 3bands Y,J,H (1.0-1.7µµ), ), HgCdTe detectors, HgCdTe detectors, photometric Zphotometric Z

NIR Spectroscopic channel: 0.5 degNIR Spectroscopic channel: 0.5 deg22, R=200-600, baseline: slitless (0.8-, R=200-600, baseline: slitless (0.8-2.02.0µ)µ), option: multi-object (0.9-1.7, option: multi-object (0.9-1.7µ) µ) Digital-Micro-Devices (DMD) based, Digital-Micro-Devices (DMD) based, redshiftsredshifts


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)

EUCLID MISSIONEUCLID MISSION


ENIS: Slitless Spectrograph OptionENIS: 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.

Input Tel. Beam To FP


ENIS: DMD Spectrograph OptionENIS: DMD Spectrograph Option

Digital Micromirror Device at thef# 3 intermediate focal plane

Input Tel. Beam


ENIS: Slitless and DMD Focal PlanesENIS: Slitless and DMD Focal Planes

(2048x2048)2040x2040Sensitive

Pix1,2

1,1

WIRING SIDE

WIRING SIDE

BLIND ZONE~ 2.9 mm TICK

~1.03'~161 Pix

~76.34 mmG-Field X ~ 0.45°A-Field X = 0.44°

36.72 mmA-Field Y = 13.14'

Pixel:18 x 18 µ

0.39" x 0.39"

H2RG DetectorSensitive Area:

36.72x36.72 mm13.14'x13.14'

OUT 1,2,xx

OUT 1,1,xx

(2048x2048)2040x2040

Sensitive Pix1,2

1,1

2,2

2,1

3,2

3,1

4,2

4,1

WIRING SIDE

WIRING SIDE

BLIND ZONE~ 2.9 mm TICK~1.21 ArcMin

~161 Pix

~76.34 mmG-Field X ~ 0.53°A-Field X = 0.51°

~ 155.58 mmG-Field Y ~ 1.08°A-Field Y = 1.02°

Pixel:18 x 18 µ

0.45 x 0.45 ArcSec

H2RG DetectorSensitive Area:

36.72x36.72 mm15.3x15.3 ArcMin

OUT 3,2,xx

OUT 3,1,xx

‘slitless’ mode FPA ‘DMD’ mode field is split at the pick-off optics

in four independent channels


ENIS FOCAL PLANEENIS FOCAL PLANE

Focal planes will be constructedmaking use of the forthcoming generation of 2048x2048 H2RG detectors with MBE processed MeCdTesensitive layer (2.5 µ cut-off) and SiC mechanical substrate.Readout electronics is based on theforthcoming 32 ch. SIDECAR ASICmounted in CGA technology.


ENIS SLITLESS FOCAL PLANEENIS SLITLESS FOCAL PLANE

‘slitless’ mode FP mechanics:

228x148x61 mm

TOT. MASS + 20% Cont. : 5700 Gr

H2RG mosaic is mounted and alignedon a SiC thermally controlled frame

Readout ASICscan stay @ higher temperature


ENIS DMD FOCAL PLANEENIS DMD FOCAL PLANE

‘DMD’ mode FP mechanics:1 from 4

same concept as for ‘slitless’ mode.

140x95x70 mm

Readout ASICs directly mountedin the housing back-cover to save space

TOT. MASS + 20% Cont. : 3800 Gr


ENIS FOCAL PLANEENIS FOCAL PLANE

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.

Extrapolated solar activity forthe Euclid launch date.


ENIS FOCAL PLANE THERMALENIS FOCAL PLANE THERMAL

System:System: Nominal Nominal Temperature :Temperature :

Long Term Long Term Stability :Stability :

H2RG DetectorH2RG Detector 80 Kº80 Kº < 10 m Kº < 10 m Kº (500 Sec)(500 Sec)

H2RG HousingH2RG Housing 75 Kº75 Kº < 2 Kº < 2 Kº (annual)(annual)

SIDECARsSIDECARs 75 or 150 Kº75 or 150 Kº < 2 Kº “< 2 Kº “

SPW AdaptersSPW Adapters 150 Kº150 Kº < 2 Kº “< 2 Kº “

SpectrographSpectrograph 150 Kº150 Kº < 2 Kº “< 2 Kº “

Optical BenchOptical Bench 150 Kº150 Kº < 2 Kº “< 2 Kº “

Telescope M1Telescope M1 < 200 Kº< 200 Kº TBDTBD

‘slitless’backgrounds

‘DMD’backgrounds

Temperature requirements derived from background radiometry:


ENIS FOCAL PLANE THERMALENIS FOCAL PLANE THERMAL

150 K

80 K

77 K

75 K


ENIS FOCAL PLANE READOUTENIS FOCAL PLANE READOUT

EXP TIME (AET)

SMPT

SMPN

FT

PedestallFsamplingFNUM/2=5

FT

SignalFsamplingFNUM/2=5

SUMMEDNDROs

DISCARDEDNDROs Up the Ramp

GroupUPNUM=3

RESET to RESET TIME (RRT)

T1T0 T2 TN-1 TNTIME SEQ

Cosmic HitBehavior

NormalBehavior

Cosmic HitArrival

Achievement of RON requirements andCRs deglitching possibility require a readout strategy based on multiple-readouts:

Sampling in continuous non-destructive readout (NDRO) mode illustrated for a single H2RG cell and results for a 15 e-

singleCDS device.

Groups:

NDROs:

RON e- RMS :

BufferGbytes:

15 2 6.2 2

Groups:

NDROs:

RON e- RMS :

BufferGbytes:

20 2 5.5 2.7


ENIS FOCAL PLANE READOUTENIS 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/Cm2About 15÷20 UTR Groups needed to correct


ENIS FOCAL PLANE CONTROLENIS 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)

15*2+2

(FP images)

TOTAL Work/Buffer Memory Needed:

671 Mbytes 2.1x2 Gbytes

(dual buffered)

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 67.1 Mbytes 114 Mbytes @ 5% CR 302 Mbytes @ 25% CR

TOTAL per Day Telemetry : 93 Gbaud 93 Gbaud 158 Gbaud @ 5% CR

418 Gbaud @ 25% CR


HAWAII-2RG1,1

SIDECAR1,1

HAWAII-2RG2,1

SIDECAR2,1

HAWAII-2RG1,2

SIDECAR1,2

HAWAII-2RG2,2

SIDECAR2,2

HAWAII-2RG3,2

SIDECAR3,2

HAWAII-2RG4,2

SIDECAR4,2

SWL LinkADAPTER

1,12

SWL LinkADAPTER

2,22

SWL LinkADAPTER

2,34

SWL Link 1,12 SWL Link 2,22

SWL Link 2,34

HAWAII-2RG3,1

SIDECAR3,1

HAWAII-2RG4,1

SIDECAR4,1

SWL LinkADAPTER

1,34

SWL Link 4,34

DIGITAL/ANALOG

I/F

DIGITALLVDS

I/FCLOCKS

PsupSYNCs

SPACEWIRELINKSPowerSupp.

2x4 Focal PlaneHousing

DIGITAL/ANALOG

I/F

DIGITALLVDS

I/FCLOCKS

PsupSYNCs

SPACEWIRELINKSPowerSupp.

TBD Temperature Control& Monitoring

Power Supply Power Supply

ENIS FOCAL PLANE CONTROLENIS FOCAL PLANE CONTROLSpace Wire (SPW) communication architecture makes the FP electronicsexactly compatible between the two configurations: slitless and DMD:

ENIS FP REQUIRED POWER + 20% CONTINGENCY: 5100 mW

150 ºK 150-75 ºK 80-100 ºK 150-75 ºK 150 ºK


ENIS FOCAL PLANE CONTROLENIS FOCAL PLANE CONTROLTwo redundant processing systems:

• DAPU, data processing (averaging, deglitching)• ICU, Controls & Data Handling (compression)


ENIS yellowbook already presentedENIS yellowbook already presented

IDD document presented (end of September)IDD document presented (end of September)

EUCLID ESA scientific presentation in novemberEUCLID ESA scientific presentation in november

Preselection results beginning next year Preselection results beginning next year

ENIS FOCAL PLANE CONCLUSIONSENIS FOCAL PLANE CONCLUSIONS

Documents

EUCLID NEAR IR SPECTROGRAPH FOCAL PLANE