Transcript Document 7528470

JRA2 Report
“Fast Detector for AO”
Opticon Mid-Term Review
chairman: Philippe Feautrier – INSU/CNRS
10-11 Sept 2007
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Content of this talk
Who we are?
What we do?
Work Packages review
Highlights of the JRA2
Schedule and comments
Future plans for FP7
Conclusion
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European
Community
Who we
are?
Opticon
board
WP2 Detector procurement
WP1 JRA-2 Coordinator
P. Feautrier
WP4 Cryogenics
WP3 Detector Controller
Industrial partner
Detector subcontract
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WP5 Detector testing
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What we do ?
JRA2 “Fast Detectors for AO”
Goal as defined in Annex I of the contract:
“define, fabricate and fully characterize the
best possible detector working at visible
wavelengths for Adaptive Optics (AO)
wavefront sensors.”
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Detector requirements
Next
Generation
Systems
Present
Systems
14x14
SH-WFS
40x40 SH-WFS
(mag~10, RON=1e-)
Each
Sub-aperture
6x6 pixels
240x240 pixels
1.
40x40 SH subapertures x 6x6 pixels/sub-aperture  240x240 pixels.
2.
Versatility: 100% fill factor / 240x240 square grid array of pixels
that can be used with any type of WFS system; SH, curvature, or pyramid.
3.
> 1.2 kHz frame rate to match the increased spatial sampling.
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The CCD 220 Design
Store slanted
to allow room for
multiple outputs.
OP 4
Metal Buttressed
2Φ 10 Mhz Clocks
for fast image to store
transfer rates.
Gain
Registers
Image
Area
OP 3
OP 2
Gain
Registers
8 L3Vision Gain
Registers/Outputs.
Each 15Mpix./s.
Gain
Registers
Image
Area
Store
Area
Store
Area
240x120
24µm
240x120
24µm
OP 1
OP 8
OP 7
Gain
Registers
OP 6
OP 5
Split frame transfer 8-output
back-illuminated e2v-L3Vision CCD.
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L3CCD with lower read noise wins
Strehl
ratio
EMCCD
RON=0
Strehl
ratio
EMCCD
RON=0
Thick CCD
RON=2
Thick CCD
RON=2
RON=3
RON=3
RON=5
RON=5
GS Magnitude.
GS Magnitude.
Low read noise of EMCCD is clearly better for white-yellow guide star
and better even for red GS if RON of Thick CCD > 2e.
Conclusion low RON (~ 0.1e-) is better than higher red response.
Reason e2v-L3 CCD was chosen.
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Funds and detector
sub-contract
CCD220 funds for the first contract with e2v: 700 k€
from Opticon JRA2, ~ 400 k€ from ESO internal
funds.
Contract signed between ESO and e2v after official
call for tender, e2v UK is a sub-contractor, not a
partner.
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The CCD220: firsts e2v
CCD220 detectors provided
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WP3 : Controller
Test Camera controller is being built by a collaboration of French Observatories
(LAM Marseille, LAOG Grenoble, and OHP Haute Provence):
– It will be loaned to e2v for testing.
– Very challenging design
– To be delivered to e2v next month
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WP4: mechanics and cryogenics
This WP was delivered and is achieved
Cooling specifications achieved
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Cryogenics results
Thermal modelling
Real measurements Arctic Silver 5
-10
CCD Temperature (°C)
-20
-30
-40
-50
-60
0
0,5
1
1,5
2
2,5
3
3,5
4
I (A)
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The OCam Test Camera
OCam, the Test Camera of the CCD220, is
the product of the WP3 + WP4:
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The OCam story
OCam will be duplicated for a lot of European places:
– On loan to e2v for detector testing
– OCam will be delivered to IAC (normal JRA2 plan), but also
duplicated for ESO for their CCD220 testing facility. Free OCam
license transfer between CNRS/INSU to help for ESO NGC
development
– But also implemented on the GTC…
Very high probability of OCam
license transfer to Andor
Technology Belfast (UK) for
commercial applications
(Astronomy, WFS, medical
imaging…): our mission is not to
infinitely duplicate cameras. Good
progress of negotiations.
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OCam on the GTC
OCam will also be used, with the CCD200 on the GTC (Gran
Telescopio Canarias), a 10.4 m segmented telescope in La Palma
under contruction.
Contract currently under negociation between CNRS (owner of
OCam) and GTC (GRANTECAN telescope, La Palma)
OCam + CCD220 will be used as WFS camera for the GTC AO
system
Schedule: signature of contract: autumn 2007, delivery ~ one year
later
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WP5: detector tests
Detector Tests at Factory
Tests under responsibility of the detector manufacturer (E2V)
To verify basic operational parameters and detector
characteristics.
Defined in VLT-PLA-E2V-14690-0008_issue_3_TestPlan and testing
equipement and facilities, according to VLT-SPE-E2V-146900002_issue_6_TestEquip_Req
Detector Controller and Camera supplied by JRA2
Tests at IAC split in 2 main topics:
Laboratory tests
Telescope tests
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Detector Tests in Laboratory
Detector characterization facility will be available on time
–
–
–
–
All the equipment has been already acquired
Test Bench components are computer controlled
Variable monochromatic flat field source is now under calibration
Direct imaging targets are assessed
IAC Test Objectives
– Verification of IAC Test Bench performance with calibrated detector systems
– Independent verification of all CCD220 factory test results
– Additional tests with emphasis on:
Long term gain stability
Detailed assessment of unwanted charge generation and charge confinement problems
(CIC, dark current, smear, PSF) and optimization of operational parameters
Detector / Camera health check procedures
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Detector Tests at IAC Telescope
The tests will run in a Telescope, either at the Observatory of El Teide in
Tenerife or at the Observatory of Roque de Los Muchachos on La
Palma.
Telescope/IAC Test Objectives
– Verification of performances of the CCD220 as the detector of a wavefront sensor
in a real situation
– To include the CCD220 WFS within the very-low-latency IAC AO Real Time
Controller, based on reconfigurable logic (FPGA), and test under real
circumstances, at the telescope. Comparison with previous detectors.
– To confirm the suitability of CCD220 for AO, measure system performances and
give inputs for further developments.
– AO Tests will be performed with science grade detectors, either on loan from ESO
or bought by IAC with a new joint ESO/IAC contract for CCD220 detectors
delivering.
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Detector Test Facility at IAC
Detector Characterization
Laboratory:
– A group called LISA
(Laboratory of Imaging and
Sensors in Astronomy) has
been created at the IAC to
be in charge of detector
testing and will characterize
the CCD220.
– LISA has a new general
Detector Test Facility at the
IAC complying with the
requirements of the
CCD220 test plan
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LISA Test Bench at IAC
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Status of deliverables and milestones (Month: 43)
WP
M/ D Description
Status
(Original)/Updated
schedule
2
M1
Science group discussions about the detector specification.
Achieved
(6) / 6
2
M2
Concept design review to agree the specification.
Achieved
(6) / 6
2
M3
Detailed design review of the detector.
Achieved
(12) / 18
2
M4
Delivery of demonstration device detector.
Achieved
(18) / 32
2
M5
Frontside device test.
Achieved
(24) / 32
2
M6
Backside device test.
Delayed
(24) / 48
2
D1
Detector specifications to the manufacturer
Achieved
(6) / 6
2
D2
Final detector acceptance report.
Delayed
(24) / 50
3
M1
Complete controller conceptual design
Achieved
(6) / 6
3
M2
Controller design review.
Achieved
(6) / 12
3
M3
Delivery of detector controller.
Delayed
(18) / 43
3
M4
Complete controller test.
Delayed
(18) / 44
3
D1
Controller acceptance report.
Delayed
(18) / 44
4
M1
Complete cryogenic system design
Achieved
(6) / 24
4
M2
Cryogenic system acceptance.
Achieved
(18) / 37
5
M1
Complete detector tests in laboratory.
Delayed
(36) / 56
5
M2
AO wavefront sensor manufactured
Delayed
(36) / 58
5
M3
Complete detector performances evaluation in an AO system.
Delayed
(42) / 60
5
M4
Acceptance of the AO wavefront sensor for AO tests
Delayed
(42) / 62
5
D1
Test report for the results on the AO test bench and/of on sky.
Delayed
(60) / 64
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Schedule: milestones and
deliverables
WP1
Management
Achieved:
M1
D1
WP2
Detector
WP3
Controller
WP4
Cryogenics
M2
M3
M4
M1
M2
M3
M4
D1
M1
M2
Delayed:
M5
M6
D2
WP5
Tests
6
2004
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2005
18
24
30
M1
M2
M3
M4
36
42
Elapsed
2006time (months)2007
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D1
48
54
60
2008
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Schedule and delays: some remarks
Schedule late, but this can be explained:
Late arrival of funds at beginning of the contract (6/12
months) has delayed activities where hardware/contracts are
concerned.
WP3 (controller) and WP4 (cryogenics) strongly dependent on
final detector design (WP2), so did not start as early as
expected
Under-estimation of the time to deliver detector controller and
cryogenics (extremely challenging development, critical path)
All these dependencies explain the delay of the overall
schedule, but this delay is under control . Main objectives of the
JRA2 will not be affected and remain compatible with the
Opticon FP6 schedule
Some testing activities may run after formal end of the FP6
contract (i.e. in 2009). Should be also tested on the GTC!
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FP7 proposal Edinburgh 07:
" Fast detectors for E-ELT AO "
JRA2 FP6: was dedicated to 2nd generation of AO instrument for 810 m class telescopes
FP7: two needs for E-ELT AO WFS detectors identified:
– LGS WFS detector: very large pixel format to sample spot elongation,
high frame rate (700 Hz), low noise (~1 e).
– XAO WFS detector: for a pyramid WFS, 2562 pixels are sufficient, but
extremely high frame rate (3 to 4 kHz) and very low noise (~1 e) are
required.
~ 5.5 years development (2008-2013)
3.6 M€ eligible cost: clearly too much… De-scope to be done.
For the proposed activity: at least ~ 3 European countries (Germany,
Spain, France), 2 European institutions (ESO, IAC), ~ 3 laboratories
(INSU/CNRS), 2 industrial partners .
AO applications are strategic for E-ELT but this activity open to
wider applications in the field of fast detectors.
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Conclusions
Great succes of the JRA2 activity:
– The CCD200 detector developed here by a European manufacturer (e2v UK) will
be used by every AO system in Europe: ESO, IAC, GTC. And also probably in the
US !
– The OCam test camera will be duplicated for a lot of European places: IAC, ESO,
GTC
– Products of this JRA will be re-used in the European astronomical community:
OCam will help for ESO NGC development, OCam will be used as GTC wavefront
sensor camera
– Complete program of detector validation carried out by IAC on telescope, as
foreseen at beginning of JRA2.
– Strong probability for a commercial transfer license of OCam to Andor Technlogy
(UK)
Excellent partnership between the European
laboratories/institutes/industry of the JRA2. Wish to continue during the
FP7, same kind of applications in the framework of E-ELT development.
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END
Many Thanks for
Listening
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