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1、PhysicaB248(1998)349Ð354ADAM,thenewreßectometerattheILLA.Schreyer!,*,R.Siebrecht!,U.Englisch",U.Pietsch",H.Zabel!!Experimentalphysik(Festko(rperphysik),Ruhr-Universita(tBochum,Postfach102148,D-44780Bochum,Germany"Institutfu(rFestko(rperphysik,Universita(tPotsdam,
2、D-14415Potsdam,GermanyAbstractThenewreßectometerADAMattheILLisdescribedandsomeoftheresultsobtainedintheÞrstyearofoperationarepresented.TheseincludeareßectivityofaSiwaferovereightordersofmagnitude,ameasurementofathick[56Fe/57Fe]isotopesuperlattice,andapolarisedreß
3、ectivityofaCo/Cumultilayer.Theinstrumentisnowavailabletooutsideusers.(1998ElsevierScienceB.V.Allrightsreserved.Keywords:Neutronreßectometry;Polarisationanalysis;InstrumentationThroughoutthelastdecadelayeredmaterialsofFebruary1996.InMay1996ADAMsawitsÞrstunpreceden
4、tedstructuralqualityhavebecomeneutrons.Sincethen,themachinehasbeensystem-available.Manyfascinatingnewpropertieshaveaticallytested,Þrstwithanunpolarisedbeam,andbeenfoundinthin-Þlmsystemsincludingpolymers,sinceSeptember1996withapolarisedbeamandbiologicalmembranes,a
5、ndmagneticmultilayerspolarisationanalysis.andsuperlattices.Neutronreßectometry(NR)wasADAMissituatedonILLÕsneutronguideH53developedtomakeuseofthewell-knownadvant-whichisfedbyaliquiddeuteriumcoldsource.InagesoftheneutronasaprobeforthestudyofsuchFig.1aschematicsketc
6、hoftheinstrumentisthin-Þlmsystems[1].CurrentlyNRisoneoftheshown.MakinguseofafocusingHOPGmono-fastestgrowingneutrontechniques.chromatoraÞxedwavelengthofj"4.4A_isse-0ThenewreßectometerADAM(AdvancedDif-lected.ABeÞlterremovesanyhigherharmonicsfractometerfortheAnalysi
7、sofMaterials)atthej/n,n"2,3,...whicharealsoreßectedbythe0ILLinGrenoble/Franceisoneofthelatestaddi-monochromator.Optionally,theBeÞltercanbetionstotheßeet.Afteradesignandconstructionremoved,allowingtheuseofj/2[2]toextendthe0phaseofaboutoneyearattheRuhr-Universitaet
8、scatteringvectorrange.TwomotorisedcollimationBochum,theinstrumentwasmovedtotheILLinslits,positioned2mapart,providethehighcol-limationrequiredforreßectometryexp
