XUVLab - Università degli Studi di Firenze Dip. di...
Transcript of XUVLab - Università degli Studi di Firenze Dip. di...
XUVLab - Università degli Studi di Firenze Dip. di Astronomia e Scienza dello Spazio
CCD CCD camerascameras and and SpacewireSpacewire forfor HERSCHEL/SCOREHERSCHEL/SCORE suborbitalsuborbital
missionmissionAlessandro Gherardi
ElEl EscorialEscorial, 1 , 1 JuneJune 20072007
OverviewOverview
The HERSCHEL The HERSCHEL suborbitalsuborbital missionmissionThe HERSCHEL/SCORE The HERSCHEL/SCORE instrumentinstrumentThe SCORE CCD The SCORE CCD camerascamerasThe The SpaceWireSpaceWire interfacesinterfaces
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The The missionmission
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The HERSCHEL The HERSCHEL missionmission
Goddard
Space Flight CenterWallops
Flight Facilities
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The HERSCHEL The HERSCHEL missionmission
HEliumHElium
ResonantResonant
Scattering in the Corona Scattering in the Corona and and HELiosphereHELiosphere
SoundingSounding
COronagraphCOronagraph
ExperimentExperimentSCORESCORE
HERSCHEL HERSCHEL ExtremeExtreme
UltravioletUltraviolet
Imaging Imaging TelescopeTelescopeHEITHEIT
HeII, OVI, FeX, FeXII
solar
disc images
H 121.6 nmHeII
30.4 nm
Electronic
abundance
(VL)
FoV
overlapping
from
1.2 to
1.5 RR
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The HERSCHEL The HERSCHEL missionmission
First First HeHe observationobservation in the in the extendedextended corona corona (1(1÷÷3 R3 R ))First First HeHe and H EUV and H EUV imagesimages in the coronain the coronaHeHe abudanceabudance measurementmeasurement in the corona in the corona ((HeHe/H)/H)VerificationVerification of of solarsolar windwind modelsmodels basedbased on on HeHeabudanceabudanceTest of Test of instrumentationinstrumentation forfor future future missionsmissions
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The HERSCHEL The HERSCHEL missionmission
~ 300 s
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The HERSCHEL The HERSCHEL missionmission
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The The instrumentinstrument
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The SCORE The SCORE instrumentinstrument
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The SCORE The SCORE instrumentinstrument
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The SCORE The SCORE instrumentinstrument
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The SCORE The SCORE instrumentinstrumentPrimary
mirror
M1
Internal
occulter
Secondary
mirror
M2
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ElEl EscorialEscorial, 1 , 1 JuneJune 20072007
The The polarimeterpolarimeter
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The The polarimeterpolarimeter
Polarimeter
(LCVR)
LCVR Controller
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The SCORE The SCORE polarimeterpolarimeter
Passband
filter
Optics Optics
Linear
polarizer Quarter
wavelenght
plate
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LCVRLCVRVo
ltage
Mol
ecul
esal
ignm
ent
Mol
ecul
esal
ignm
ent
Maximum delay (V=0)
Minimum delay (V>0)
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LCVR ControllerLCVR Controller
•Arbitrary
pattern generation (time and pattern)
•Temperature control•Totally
reprogrammable
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CCD CCD camerascameras
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CCD CCD camerascameras
ICCD detector
CCD detector
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CCD CCD camerascameras
SpaceWireSpaceWire
Clock Clock generatorgeneratorSignalSignal analizeranalizerand and converterconverter
Power Power supplysupplyPeltierPeltier controllercontroller
DetectorDetector
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WhyWhy notnot commercial?commercial?
Space Space applicationapplication!!High High customizationcustomizationAutomaticAutomatic acquisitionacquisition proceduresprocedures((onlyonly 5 5 minmin!!)!!)
Smart Smart ElettronicsElettronicsCustomizedCustomized geometricalgeometrical requirementsrequirements
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GeometricalGeometrical constraintsconstraints
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Camera overviewCamera overview
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Camera overviewCamera overview
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BoardsBoardsSocket
& Pre SpaceWire
CDS & ADC Power Supplies Sequencer
& CD
Peltier
Power Supply
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CCDsCCDs
VLD E2V 47VLD E2V 47--2020 UVD E2V 42UVD E2V 42--4040
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UVD UVD -- ICCDICCD
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SimultaneousSimultaneous observationsobservations
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FilterFilter mechanismmechanism
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SpacewireSpacewire interfaceinterface
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SpaceWireSpaceWire interfaceinterface
WhyWhy SpaceWireSpaceWire??The The SpaceWireSpaceWire protocolprotocolWhyWhy ““customcustom”” interface?interface?CharacteristicsCharacteristics of of ourour circuitcircuit
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WhyWhy SpaceWireSpaceWire??
ESA StandardESA StandardRocketRocket interfaceinterfaceFast Fast transmissiontransmission protocolprotocol (200 (200 MbpsMbps) and ) and lowlow power power consumptionconsumption (LVDS)(LVDS)CodedCoded datadata
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SpaceWireSpaceWire featuresfeatures
SignalsSignals
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SpaceWireSpaceWire featuresfeatures
SignalsSignals
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SpaceWireSpaceWire featuresfeatures
WiresWiresMicro
D 9 poles
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WhyWhy a a customcustom interface?interface?
1.1.
NotNot
a common interfacea common interface2.2.
High High levellevel
of of automationautomation
((onlyonly
300 s!!)300 s!!)
3.3.
RecoveryRecovery
proceduresprocedures4.4.
HandshakeHandshake
5.5.
CustomCustom
data data transmissiontransmission
and and protocolprotocol
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WhyWhy a a customcustom interface?interface?
SpaceWireSpaceWireCCD cameraCCD camera
16 bits
coded
DATA
commands
handshake
16 bits
DATA + headerCheckHousekeeping
LCVR ControllerLCVR Controller
Commands
HousekeepingCommands
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SpacewireSpacewire board board
SMCSSMCSFIFOFIFO
μμCC
LogicsLogics
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ScheduleSchedule
VibrationalVibrational teststests at WFF at WFF –– AugustAugust 20072007System System integrationintegration –– SeptemberSeptember 20072007LaunchLaunch –– OctoberOctober 2007, 2007, WhiteWhite SandsSands
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Working Working groupgroup in in FlorenceFlorence
Marco Marco RomoliRomoliEmanuele PaceEmanuele PaceAlessandro GherardiAlessandro GherardiFederico Federico LandiniLandiniGianni CortiGianni CortiMaurizio PancrazziMaurizio PancrazziGuglielmo RossiGuglielmo RossiMauro Mauro FocardiFocardiDario Dario PaganiniPaganiniMauro SozziMauro Sozzi
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ThankThank youyou!!
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CountCount rate rate estimationestimation
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FiltersFilters
VL and H VL and H LyLyαα : : interferentialinterferential filterfilter MgFMgF and Siand Si
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FiltersFiltersHeHe II II LyLyαα: 2 : 2 lowlow pass Al pass Al filtersfilters
To
cut >80 nm
and 16 nm
reflected
by
multilayer
coating
of M1 and M2
Reflectivity
of SiMo
mirror
(blue)Trasmissivity
of Al filter
(red)
Total bandwith