简介：WestudiedthespatialevolutionoftheFe-Niplasmageneratedbythefundamental(1064nm)andsecond(532nm)harmonicsofaQ-switchedNd:YAGlaser.Theexperimentallyobservedlineprofilesoftheneutraliron(FeI)havebeenusedtoextracttheplasmatemperature(Te)usingtheBoltzmannplotmethod,whereastheelectronnumberdensity(Ne)hasbeendeter-minedfromtheStarkbroadening.Inaddition,westudiedthespatialbehaviorofTeandNewiththevariationoflaserenergyforironplasmabyplacingthetargetmaterial(iron-nickelalloy)inairatatmosphericpressureforbothmodesoftheNd:YAGlaser.

简介：

简介：Moleculardynamicssimulationswereperformedtostudytheinteractionbetweenatomichydrogenandsiliconcarbide.Inthepresentstudy,wefocusontheeffectofthesurfacetemperatureonHinteractingwithsiliconcarbide.ThesimulationresultsshowthattheretentionofHatomsinthesampledecreaseslinearlywithincreasingsurfacetemperature.ThedepthprofileanalysisshowsthatthesampleismodifiedbyHbombardment,andthedensityofHatomsisgreaterthanthoseofSiandCatomsneartheinterfaceregionbetweentheH-containingregionandthebulk.However,nearthesurfaceregionthedensitiesofH,SiandCatomsarealmostequivalent.Inthemodifiedlayer,thebondsconsistofSi-CandSi-HandC-H.ThefractionofSi-Cbondsisthegreatest.OnlyafewC-Hbondsarepresent.

简介：Ahighlyreliableinterfaceofself-alignedbarrierCuSiNthinlayerbetweentheCufilmandthenano-porousSiC:H(p-SiC:H)cappingbarrier(k=3.3)hasbeendevelopedinthepresentwork.Withtheintroductionofself-alignedbarrier(SAB)CuSiNbetweenaCufilmandap-SiC:Hcappingbarrier,theinterfacialthermalstabilityandtheadhesionoftheCu/p-SiC:Hfilmareconsiderablyenhanced.AsignificantimprovementofadhesionstrengthandthermalstabilityofCu/p-SiC:H/SiOC:Hfilmstackhasbeenachievedbyoptimizingthepre-cleanstepbeforecap-layerdepositionandbyformingtheCuSiN-likephase.ThiscaplayeronthesurfaceoftheCucanprovideamorecohesiveinterfaceandeffectivelysuppressCuatommigrationaswell.

简介：

简介：利用角分辨紫外光电子谱对乙烯和乙炔气体在Ru(1010)表面的吸附及与K的共吸附的研究结果表明：当衬底温度超过200K，乙烯即发生脱氢反应，σCH和σCC能级均向高结合能方向移动。在室温下，σCH和σCC能级位置与乙炔在Ru(1010）表面的吸附时的分子能级完全一致。乙烯发生脱氢反应后的主要产物为乙炔。衬底温度从120K到室温，Ru(1010）表面上乙炔的σCH和σCC能级均未发现变化。室温下乙炔仍然可以在Ru(1010）表面以分子状态稳定吸附。在有K的Ru(1010）表面上，室温时σCC谱峰几乎。碱金属K的存在促进了乙炔的分解。

简介：InthedischargeofEASTtokamak,itisobservedthat（2,1）neoclassicaltearingmode（NTM）istriggeredbymodecouplingwitha（1,1）internalmode.Usingsingularvaluedecomposition（SVD）methodforsoftX-rayemissionandforelectroncyclotronemission（ECE）,thecouplingspatialstructuresandcouplingprocessbetweenthesetwomodesareanalyzedindetail.TheresultsofSVDforECErevealthatthephasedifferencebetweenthesetwomodesequalstozero.Thisisconsistentwiththeperfectcouplingcondition.Finally,performingstatisticalanalysisofγ1/1,ζ1/1andω2/1,wefindthatγ1/1moreaccuratelyrepresentsthecouplingstrengththanζ1/1,andγ1/1isalsostronglyrelatedtothe（2,1）NTMtriggering,whereγ1/1isthewidthof（1,1）internalmode,ζ1/1istheperturbedamplitudeof（1,1）internalmode,andω2/1denotesthemagneticislandwidthof（2,1）NTM.

简介：Thedeviceofacetyleneproductionbyhydrogen(H-)plasmapyrolysiscoalisexaminedanddevelopednotonlyforstudyingtheapplicationoflowtemperatureplasmabutalsoforstudyingthecleanuseofcoal.Thepower-supplycontrolsystemisusedtoensuresupplyingasteadyenergytogenerateandmaintaintheplasmaelectricarcofthedevice.Thehardwareconfigurationandthesoftwaredesignofthesystemaredescribedinthispaper.Verifiedbyexperiments,thissystemcanmeettherequirementsofreal-timeperformance,reliabilityandextensibilityforthedevice.

简介：

简介：

简介：

简介：本文通过对三聚氰胺(C3N6H6)的室温高压原位同步辐射能量散射x-ray衍射实验（EDXRD），在14．7GPa压力范围内，观察到常压下为单斜晶系的三聚氰胺经历了两次压致结构相变。在1．3GPa下，三聚氰胺分子晶体从单斜相转变为三斜相；在8．2GPa又转变为正交相。

简介：

简介：AnovelfittingprocedureisproposedforabetterdeterminationofH2rovibrationaldistributionfromtheFulcher-abandspectroscopy.WehaverecalculatedthetransitionprobabilitiesandtheresultsshowthattheydeviatefromFranck-Condonapproximationespeciallyforthenon-diagonaltransitions.Wealsocalculatedthecompletesetsofvibrationallyresolvedcrosssectionsforelectronimpactd3∏u-X3∑gtransitionbasedonthesemi-classicalGryzinskitheory.AnexampleofexperimentalstudyconfirmsthatcurrentapproachprovidesatoolforabetterdiagnosticsofH2rovibrationaldistributioninelectronicgroundstate.

简介：StableoperatingregionintheHL-1Mtokamakhasbeenextendedbymeansofwallconditioning,corefuellingandcurrentcontroltechniques.Themechanismsoftheextensionareanalyzedinthispaper.Lithiumizationdiminishestheimpuritiesandhydrogenrecyclingtothelowestlevel.Afterlithiumizationahighdensityupto7×1019m-3wasobtainedeasilybystronggaspuffingwithordinaryohmicdischargealone.MoreattractivelywefoundthatmetalLi-coatingexhibitedtheeffectsofwallstabilization.Thelowqalimitwithhigherdensitywasextendedbyafactorof1.5～2incomparisonwiththatforboronization,and1.2forsiliconization.Siliconizationnotonlyextendedstableoperatingregionsignificantlybyitself,butalsoprovidedagoodtargetplasmaforotherexperimentsofraisingdensitylimit.Corefuellingschemesarefavourableespeciallyforsiliconizedwallwithahigherlevelofmedium-Zimpurity(Z=14).Aftersiliconizationthemaximumdensitynearto1020m-3wasachievedbyacombinationofsupersonicmoleculebeaminjectionandmultipelletinjection.ThenewdefinedslopeofHugilllimitillustratingmoreclearlythesituationunderlowqaandhighnedischargeswascreatedtoindicatethenewregionextendedbycombiningIpramp-upwithcorefuelling.TheslopewithalargeMurakamicoefficientincreasedbyafactorof50～60%.

简介：

简介：某制造厂在核级阀门返厂维修过程中出现核l级阀门锻件违规补焊事件,之后又在核级阀门制造过程中出现无损检验违规事件,两起事件造成核级阀门出现了质量隐患.该违规事件反映出制造厂质量保证体系运转存在严重问题,工程公司和业主监造不力.事件相关方应加强质量管理和过程控制,消除质量隐患,做好经验反馈,确保核设备质量.

简介：

简介：

简介：给出了北京正负电子对撞机（BEPC）同步辐射新组装的3W1Wiggler束斑强度分布及光子束流的测量结果，并与理论计算作了比较，两者得出了一致的结果。