A beam-shapingsystemforTIMEXbeamline

C. Svetina (1) , C. Masciovecchio (1) , G. Sostero (1) , R. Sergo (1) , R. Borghes (1) , C. Callegari (1) , Frank d'Amico (1) , F. Bencivenga (1) , A. Di Cicco (2, 3) , D. Cocco (1)

1 Sincrotrone Trieste
2 CNISM, DipartimentodiFisicaUniversit a degliStudidiCamerino
3 IMPMC - Institut de minéralogie et de physique des milieux condensés

FERMI@ElettraisaFreeElectronLaser(FEL)userfacilitycurrentlyunderconstructionatSincrotrone Trieste inItaly.Itwillprovideaspatiallycoherentandtransform-limitedphotonbeaminthesub-ps regime,coveringtheVUV/SoftX-rayrange(from100downto1.33nm).Thankstoitshighfluencethis 4th generationlightsourcewillbeabletocreateandprobewarmdensematter(WDM)insidethe TIMEX end-station.SincetheWDMstatehasashortlifetime(afewps),measurementofbasicphysical quantities,suchastemperatureanddensity,isachallengeandnewapproachesareneeded.Forthis reason anewmethodhasbeenproposedformeasuringtemperatureusingaslowlyresponding pyrometricprobe(Principietal.,2010 [1]).However,thetechniquedoesrequirethespatialphoton beam profiletobeproperlyshapedatthesample.Thiscanbedoneusinganactiveoptic(i.e.a deformableplanemirror)placedbeforetheellipticalfocusingmirror.Ray-tracingsimulationsand metrologymeasurementsonaprototypehavebeenperformedandtheresultsarepresentedhere

Mots clés: Free electronlaser(FEL); Beam-shaping; Active optics; Warm densematter(WDM)

Domaines: Autre [cond-mat.other]

C. Svetina, C. Masciovecchio, G. Sostero, R. Sergo, R. Borghes, et al.. A beam-shapingsystemforTIMEXbeamline. Nuclear Instruments and Methods in Physics Research, 2011, 635, pp.S12-S15. ⟨hal-00613300⟩