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

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The The missionmission

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The HERSCHEL The HERSCHEL missionmission

Goddard

Space Flight CenterWallops

Flight Facilities

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

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

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

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

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The HERSCHEL The HERSCHEL missionmission

~ 300 s

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The HERSCHEL The HERSCHEL missionmission

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The The instrumentinstrument

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The SCORE The SCORE instrumentinstrument

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The SCORE The SCORE instrumentinstrument

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The SCORE The SCORE instrumentinstrument

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The SCORE The SCORE instrumentinstrumentPrimary

mirror

M1

Internal

occulter

Secondary

mirror

M2

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The The polarimeterpolarimeter

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The The polarimeterpolarimeter

Polarimeter

(LCVR)

LCVR Controller

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

The SCORE The SCORE polarimeterpolarimeter

Passband

filter

Optics Optics

Linear

polarizer Quarter

wavelenght

plate

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

LCVRLCVRVo

ltage

Mol

ecul

esal

ignm

ent

Mol

ecul

esal

ignm

ent

Maximum delay (V=0)

Minimum delay (V>0)

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

LCVR ControllerLCVR Controller

•Arbitrary

pattern generation (time and pattern)

•Temperature control•Totally

reprogrammable

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

CCD CCD camerascameras

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

CCD CCD camerascameras

ICCD detector

CCD detector

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

CCD CCD camerascameras

SpaceWireSpaceWire

Clock Clock generatorgeneratorSignalSignal analizeranalizerand and converterconverter

Power Power supplysupplyPeltierPeltier controllercontroller

DetectorDetector

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

WhyWhy notnot commercial?commercial?

Space Space applicationapplication!!High High customizationcustomizationAutomaticAutomatic acquisitionacquisition proceduresprocedures((onlyonly 5 5 minmin!!)!!)

Smart Smart ElettronicsElettronicsCustomizedCustomized geometricalgeometrical requirementsrequirements

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

GeometricalGeometrical constraintsconstraints

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

Camera overviewCamera overview

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

Camera overviewCamera overview

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

BoardsBoardsSocket

& Pre SpaceWire

CDS & ADC Power Supplies Sequencer

& CD

Peltier

Power Supply

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

CCDsCCDs

VLD E2V 47VLD E2V 47--2020 UVD E2V 42UVD E2V 42--4040

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

UVD UVD -- ICCDICCD

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

SimultaneousSimultaneous observationsobservations

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

FilterFilter mechanismmechanism

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

SpacewireSpacewire interfaceinterface

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

SpaceWireSpaceWire interfaceinterface

WhyWhy SpaceWireSpaceWire??The The SpaceWireSpaceWire protocolprotocolWhyWhy ““customcustom”” interface?interface?CharacteristicsCharacteristics of of ourour circuitcircuit

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

WhyWhy SpaceWireSpaceWire??

ESA StandardESA StandardRocketRocket interfaceinterfaceFast Fast transmissiontransmission protocolprotocol (200 (200 MbpsMbps) and ) and lowlow power power consumptionconsumption (LVDS)(LVDS)CodedCoded datadata

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

SpaceWireSpaceWire featuresfeatures

SignalsSignals

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

SpaceWireSpaceWire featuresfeatures

SignalsSignals

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

SpaceWireSpaceWire featuresfeatures

WiresWiresMicro

D 9 poles

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

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

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

WhyWhy a a customcustom interface?interface?

SpaceWireSpaceWireCCD cameraCCD camera

16 bits

coded

DATA

commands

handshake

16 bits

DATA + headerCheckHousekeeping

LCVR ControllerLCVR Controller

Commands

HousekeepingCommands

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

SpacewireSpacewire board board

SMCSSMCSFIFOFIFO

μμCC

LogicsLogics

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

ScheduleSchedule

VibrationalVibrational teststests at WFF at WFF –– AugustAugust 20072007System System integrationintegration –– SeptemberSeptember 20072007LaunchLaunch –– OctoberOctober 2007, 2007, WhiteWhite SandsSands

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

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

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

ThankThank youyou!!

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

CountCount rate rate estimationestimation

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

FiltersFilters

VL and H VL and H LyLyαα : : interferentialinterferential filterfilter MgFMgF and Siand Si

ElEl EscorialEscorial, 1 , 1 JuneJune 20072007

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