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Simbol–X workshopMay 14th, 2007 Focal plane assembly
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Simbol–X workshop May 14th, 2007
The Simbol-X Detector Payload
P. LaurentCEA/Saclay & APC
Simbol–X workshop May 14th, 2007
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
Simbol–X workshop May 14th, 2007
Focal plane assembly
Simbol–X workshop May 14th, 2007
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
Simbol–X workshop May 14th, 2007
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 !
Simbol–X workshop May 14th, 2007
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
Simbol–X workshop May 14th, 2007
Test benches ready for systematic current and spectroscopy measurements of different types of CdTe and Cd(Zn)Te
HED Detectors Tests (CEA/Saclay)
Simbol–X workshop May 14th, 2007
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)
Simbol–X workshop May 14th, 2007
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
Simbol–X workshop May 14th, 2007
The high energy focal plane building
One module256 pixels~ 1x1 cm2
One sector8 modules2048 pixels
The focal plane8 sectors16384 pixels
Simbol–X workshop May 14th, 2007
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
Simbol–X workshop May 14th, 2007
Passive shielding
Plastic scintillator
LED
HED
Thermal Isolation
PM
WLS optical fibers
Simbol-X focal plane shielding
Simbol–X workshop May 14th, 2007
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
…
Simbol–X workshop May 14th, 2007
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.
Simbol–X workshop May 14th, 2007
The focal plane assembly
Base Plate
Lower AC
LED et HED
Upper AC
Support
Simbol–X workshop May 14th, 2007
Inside the protective enclosure …
Calibration wheel
FPA
Protective enclosure
Simbol–X workshop May 14th, 2007
The collimator
Simbol–X workshop May 14th, 2007
Collimator geometry vs satellite movement
Simbol–X workshop May 14th, 2007
Collimator geometry vs satellite movement
Simbol–X workshop May 14th, 2007
Collimator geometry vs satellite movement
Simbol–X workshop May 14th, 2007
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
Simbol–X workshop May 14th, 2007
Warm electronics
Simbol–X workshop May 14th, 2007
FPA electronics scheme
Simbol–X workshop May 14th, 2007
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
Simbol–X workshop May 14th, 2007
Thank you !
Simbol–X workshop May 14th, 2007
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
Simbol–X workshop May 14th, 2007
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