XUVLab - Università degli Studi di Firenze Dip. di ...webs.ucm.es/info/nuva/meetings/escorial2007/files/gherardi_a.pdf · El Escorial, 1 June 2007 The HERSCHEL mission zFirst He

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


The The missionmission


The HERSCHEL The HERSCHEL missionmission

Goddard

Space Flight CenterWallops

Flight Facilities



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



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



~ 300 s




The The instrumentinstrument


The SCORE The SCORE instrumentinstrument






The SCORE The SCORE instrumentinstrumentPrimary

mirror

M1

Internal

occulter

Secondary

mirror

M2



The The polarimeterpolarimeter


The The polarimeterpolarimeter

Polarimeter

(LCVR)

LCVR Controller


The SCORE The SCORE polarimeterpolarimeter

Passband

filter

Optics Optics

Linear

polarizer Quarter

wavelenght

plate


LCVRLCVRVo

ltage

Mol

ecul

esal

ignm

ent

Mol

ecul

esal

ignm

ent

Maximum delay (V=0)

Minimum delay (V>0)


LCVR ControllerLCVR Controller

•Arbitrary

pattern generation (time and pattern)

•Temperature control•Totally

reprogrammable


CCD CCD camerascameras



ICCD detector

CCD detector



SpaceWireSpaceWire

Clock Clock generatorgeneratorSignalSignal analizeranalizerand and converterconverter

Power Power supplysupplyPeltierPeltier controllercontroller

DetectorDetector


WhyWhy notnot commercial?commercial?

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

Smart Smart ElettronicsElettronicsCustomizedCustomized geometricalgeometrical requirementsrequirements


GeometricalGeometrical constraintsconstraints


Camera overviewCamera overview


Camera overviewCamera overview


BoardsBoardsSocket

& Pre SpaceWire

CDS & ADC Power Supplies Sequencer

& CD

Peltier

Power Supply


CCDsCCDs

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


UVD UVD -- ICCDICCD


SimultaneousSimultaneous observationsobservations


FilterFilter mechanismmechanism


SpacewireSpacewire interfaceinterface


SpaceWireSpaceWire interfaceinterface

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


WhyWhy SpaceWireSpaceWire??

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


SpaceWireSpaceWire featuresfeatures

SignalsSignals



SignalsSignals



WiresWiresMicro

D 9 poles


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


WhyWhy a a customcustom interface?interface?

SpaceWireSpaceWireCCD cameraCCD camera

16 bits

coded

DATA

commands

handshake

16 bits

DATA + headerCheckHousekeeping

LCVR ControllerLCVR Controller

Commands

HousekeepingCommands


SpacewireSpacewire board board

SMCSSMCSFIFOFIFO

μμCC

LogicsLogics


ScheduleSchedule

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


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


ThankThank youyou!!


CountCount rate rate estimationestimation


FiltersFilters

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


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

Documents

XUVLab - Università degli Studi di Firenze Dip. di ...webs.ucm.es/info/nuva/meetings/escorial2007/files/gherardi_a.pdf · El Escorial, 1 June 2007 The HERSCHEL mission zFirst He