simbol–x workshopmay 14th, 2007 the simbol-x detector payload p. laurent cea/saclay & apc

Simbol–X workshop May 14th, 2007

The Simbol-X Detector Payload

P. LaurentCEA/Saclay & APC


Collimator : ~ 2 m long graded shield. Full out of FOV sky closed with associated sky-shield on mirror S/C.

The detector payload

Focal plane assembly

Warm electronics


Focal plane assembly


The focal plane assembly

• Spectro-imaging system 0.5-100 keV, fast reading• Full size : 8x8 cm2, 128x128 pixels of 625 m• Operation at ~ -40°C

Low energy detector (450 m Silicon)

High energy detector (2 mm Cd(Zn)Te)

Active and passive shielding


Low energy detector (MPE/IAAT)Macro Pixel Detector with integrated DEPFET

• Low power consumption• Internal amplification• Active Pixel Sensor type• 100 % filling factor• Adjustable pixel size (50 m to 1

mm)• Fast, parallel readout possible

625 μm²

0 1000 2000 3000 4000 5000 6000 70001

10

100-20 °C

Cou

nts

Energy (eV)

~ 130 eV FWHM @ -20°C

See Peter Lechner presentation !


High Energy Detector Basic Brick (CEA/Saclay)

• Electronics : 32 channel front end chip (IdeF-X) under development and tests

• Hybridization : on going qualification of process, 64 pixels “caliste” modules realized

• Detectors : 2 mm thick pixellated CdTe or CdZnTe crystals, under tests and promising

-18° / 400V / CdTe Schottky

1.0 keV FWHM

1 mm / 64 pixels


Test benches ready for systematic current and spectroscopy measurements of different types of CdTe and Cd(Zn)Te

HED Detectors Tests (CEA/Saclay)


IDeF-X V2 under test – Received on 1st of February 07– Step 1 : Basic behavior

•Slow control ok, – Trigger, parameter tuning, – data acquisition

•Acquisition and modes ok•Prototype software ok•Test channel ok

– Step 2 : Performances •On going•Full Multi-channel started

– Ready for SEL and SEU tests

HED Front End Tests (CEA/Saclay)


CEA/DAPNIA – CNES – 3D plus

First performance evaluation of HED Calistes w/o CdTeFirst tests Actual results

Gain

Noise performances

High uniformity of the matrix in gain and noise


The high energy focal plane building

One module256 pixels~ 1x1 cm2

One sector8 modules2048 pixels

The focal plane8 sectors16384 pixels


Background reduction in

Simbol-X• Photons background outside the FOV: passive shielding around the detectors + collimator + sky shield• Particles induced background: plastic scintillators around the detectors


Passive shielding

Plastic scintillator

LED

HED

Thermal Isolation

PM

WLS optical fibers

Simbol-X focal plane shielding


The focal plane passive shielding graded shield

Tantalum 3 mm

Aluminum 0, 27 mm

Carbon 0,1 mm

Tin 2,2 mmCopper 0,48 mm

material 1 material 2 material 3

photon X/ γX-ray fluorescence E1

X-ray fluorescence E2

X-ray fluorescence E3 Photon

energy below the LED low threshold

E3 < E2 < E1

Composition and thickness of the shields

layers have been optimized to suppress

all sky radiation and the resulting fluorescence

…


Plastic scintillator

WLS fibers

main PM 1

main PM 2

redundant PM 1

redundant PM 2

The focal plane anticoïncidence:Plastic read by fibers and 16 channels PM

Multianod PM 16 ch.


The focal plane assembly

Base Plate

Lower AC

LED et HED

Upper AC

Support


Inside the protective enclosure …

Calibration wheel

FPA

Protective enclosure


The collimator


Collimator geometry vs satellite movement


2m 2

0-The Honeycomb Structure has been validated by the CNES.-3 options have been studied with differents parameters for the honeycomb-Actually we have a solution fitting with the mass budget and with a first resonnant mode above 100Hz

1m 28

Total Mass : 23 kgGraded Shield: 6 kgStructure: 17 kg

The collimator


Warm electronics


FPA electronics scheme


DPDPA1DPDPA2 HEDE

LEDE ACDE

Green: Power SupplyOrange: FPA LinkBlue: Data LinkPink: TM/TC Link

Goals :

-Minimize the length of the cables-Thermal insulated from Stable Platform

FPA warm electronics boxes


Thank you !


LEDA

HEDA

Platform

ACDA

PERADIATOR@ -60°C

Tspace@ 4K

TIF= -45

TIF= -48,3

T= -57

T= +20

h=1 W.K-1

h=3 W.K-1

T= 1,8T= 19

FPA thermal budget


FPA mass budget

Mass /kg Marge / % Marged Mass / kg

FPA Protective Enclosure 11 15% 12,65

Mechanical IF 1,2 20% 1,44HEDA FP 0,86 20% 1,03

HEDA/LEDA Mechanical IF 0,3 20% 0,36LEDA FP 0,81 20% 0,97

LEDA+HEDA Mechanical Structure 0,5 20% 0,60

Anticoïncidence + Support 26 20% 31,20Calibration Wheel 2,5 20% 3,00

Connectors 1 15% 1,15Miscellaneous 1 30% 1,30

Total FPA 45,17 53,70Total Collimator 23,00 26,80

Total Warm electronics 32,70 38,33Total 100,87 118,83

simbol–x workshopmay 14th, 2007 the simbol-x detector payload p. laurent cea/saclay & apc

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