简介:Wehavedevelopedanewradiographysetupwithashort-pulselaser-drivenx-raysource.Usingaradiographyaxisperpendiculartobothlong-andshort-pulselasersallowedoptimizingtheincidentangleoftheshort-pulselaseronthex-raysourcetarget.Thesetuphasbeentestedwithvariousx-raysourcetargetmaterialsanddifferentlaserwavelengths.Signaltonoiseratiosarepresentedaswellasachievedspatialresolutions.ThehighqualityofourtechniqueisillustratedonaplasmaflowradiographobtainedduringalaboratoryastrophysicsexperimentonPOLARs.
简介:Itisimpossibletodirectlyanalyzethemicrostructureofspin-valvemultilayersbasedonNi,F,CuandMnbyaconventionalX-raydiffractiontechniquebecausethelatticeparameterandatomicsatteringfactorsofthemareveryclose.Tosolvethisproblem,weuseanx-rayanomalousdiffractiontechniquetocharacterizethemicrostructuresofthe[Ni80Fe20/Fe50Mn50]15and[Ni80Fe20/Cu]15superlatticesystems.Theresultsshowthatmorediffractionpeaksandhigherinternsityinthereflectivetyprofileareobservedwhentheincidentenergyisclosetotheabsorptionedgeofthelighterelement(Mn)in[Ni80Fe20/Fe50Mn50]15multilayersystemsandtotheabsorptionedgeoftheheavierelement(Cu)inthe[Ni80Fe20/Cu]15multilayersystems.Theinterfaceandperiodicstructureof[Ni80F20/Fe50Mn50]15aremoreperfectthanthatofthe[Ni80Fe20/Cu]15superlattices.Theaboveresultsaredisussedinthispaper.
简介:Small-angleX-rayscattering(SAXS)usingsynchrotronradiationasX-raysourcehasbeenemployedtocharactcizcthemicroscopicstructrureoforgano-modifiedmesoporousmolecularsieves(organo-MSU-X)preparedbyaone-pottemplate-directedsynthesis.ItisshownthattheSAXSprofileishardlyconstantwithPorod’slawshowinganegativeslope,i.e.,negativedeviation.Thissuggeststhatthereisdiffuseinterfaciallayerlocatedbetweentheporesandthematrix.Thissuggeststhattheorganicgroupsremaincovalentlylinkedtothematrix,asindicatedby^29SiCPMASNMRandFT-IR.Theaveragethicknessoftheinterfaciallayerwasfoundtobeabout1nmforeachofthethreesampleswithdifferentkindsandthesameamounts(20?oforganicgroups.Thiskindofmaterialhasalsobeenprovedtopossessbothsurfaceandmassfractalstructureoftheamophousporoussilicamaterials.2001ElsevierScienceB.V.Allrightsreserved.
简介:ThispaperprovidesareviewonsampleinjectorswhichareprovidedatSPring-8AngstromCompactfreeelectronLAser(SACLA)forconductingserialmeasurementina‘diffract-before-destroy'schemeusinganx-rayfreeelectronlaser(XFEL).VersatileexperimentalplatformsatSACLAareabletoacceptvarioustypesofinjectors,amongwhichliquidjet,dropletandviscouscarrierinjectorsarefrequentlyutilized.Theseinjectorsproducedifferentformsoffluidtargetssuchasaliquidfilamentwithadiameterintheorderofmicrometer,micro-dropletsynchronizedtoXFELpulses,andslowlyflowingcolumnofhighlyviscousfluidwitharatebelow1μLmin-1.Characteristicsandapplicationsoftheinjectorsaredescribed.
简介:O434.122006065468强脉冲软X光辐照薄塑料闪烁体发光特性研究=LinearluminescenceforthinplasticscintillatorsunderintensesoftX-rayirradiation[刊,中]/宁家敏(中物院核物理与化学研究所.四川,绵阳(621900)),蒋世伦…//强激光与粒子束.—2006,18(7).—1215-1218介绍了Z-pinch实验用软X光功率仪的测量原理,利用“强光一号”产生的强脉冲软X光对薄塑料闪烁体((?)40min×0.1mm)进行了辐照。实验中,采用两套软X光功率仪并安装在同一个大法兰面上.其中一套作为标准系统,参数保持不变,另一套系统的狭缝宽度逐渐增加,以改
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简介:ThefabricationofX-raymasksisacriticalandchallengingprocessinLIGAtechnique.Asinductivelycoupledplasma(ICP)deepetchingappearstobethemostsuitablesourcefordeepsiliconetching,wefabricatedanewtypeX-raymaskusingthistechnique.IncomparisonwithothertypesofX-raymasks,themaskwefabricatedhastheadvantagesofitslowcostanditssimplefabricationprocess.BesiredmicrostructureshavealsobeenfabricatedusingthisnewtypeX-raymaskinLIGAtechnique.
简介:ThegrowinginterestintheuseofGalliumArsenidssemiconductormaterialshaspresentedmanyopportunitiesfordeviceoperationalspeedimprovementsbuthasalsopresentedmanyproblemsforthedevicemaker,Anoveldeep-submicronx-raylithographyprocessforT-shapedgatepatternsusefulforhigh-electron-mobilitytransistors(HEMT)isintroducedinthiswork.InthefabricationofT-shapedgateatherrlayerresistsmethodisused.Thex-rayexposureexperimentswerefinishedbyBeijingSynchrotronRadiationFacility(BSRF)3B1Abeamline,andgoodresulthasbeenobtained.