EuropeanSpalla,onSource

EskoOksanenInstrumentScien,st,

MacromolecularCrystallography

EnterpriseEuropeNetwork

Lund2018-05-16

ESS at a glance

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Lund%MAX%IV%

ESS#

A European project to build the most powerful neutron source in the world

Fission: One neutron in, three neutrons out; Use a nuclear reactor

ILL - France

ESS-Sweden

Spallation: Up to 30 neutrons per proton; Accelerator to propel

proton onto target

How to produce neutron beams

Typically pulsed

Typically continuous

High-intensityspallationsources

OECD 1999: ”One powerful spallation source in every global region”

SNS, Tennessee 2008

ESS, Lund 2021

J-Parc, Tokai-Mura 2008

ESSHighLevelDesign

HighPowerAcceleratormeansmoreneutrons

AnInnova6veTargetSta6onthatcanhost>30instruments

Flatmoderatordeliveringsmallerandbrighterneutronbeams

Highbrightnessandtuneableresolu6onmakesnewmeasurementspossible

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Acceleratortunnel

Exp.Hall1

Targetbuilding

Exp.Hall2

Neutronguidehall

Exp.Hall3 5MWLinearprotonaccelerator(~600m)-2.86 ms pulses -2 GeV -62.5 mA -14 Hz -Flexible design for future upgrades

Long pulse

Targetsta<on-Rotating tungsten wheel 2.5 m diameter -He cooled -Water (293 K) and liquid hydrogen (20 K) moderators

High brilliance moderators

Theworld’sbrightestneutronsource

Lifesciencecanmakegooduseofthesource!

Tentativeinstrumentramp-up

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Journeytodelivertheworld’sleadingfacilityforresearchusingneutrons

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2014Construc.onStartsonGreenFieldSite

2009DecisiontoSiteESSinLund

2025ESSConstruc.onPhaseComplete

2003EuropeanDesignofESSCompleted

2012ESSDesignUpdatePhaseComplete

2019StartofIni.alOpera.onsPhase

2023ESSStartsUserProgram

• Theyhavewavelengthssimilartoatomicdistances

• Theyhaveenergiescomparabletomolecularmotions

• Theyinteractweakly→theypenetrateintothebulk

• Theyarenon-destructive

• Theyseeacompletelydifferentcontrasttox-rays→isotopelabelling

Neutronscatteringinlifesciences-whyneutrons?

Esko Oksanen, European Spallation Source9

ESS Instrument suite

NMX

KeyadvantagesofESSMacromolecularDiffractometer

NMX–MacromoleculardiffractometeratESS

Smallercrystalsneeded(200µmvs.1mm)

Datacollec,onfaster(daysvs.weeks)

Largerunitcellspossible(300Åvs.150Å)

Partners

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