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简介：Thedefectchangesin6H-SiCafterannealingand10MeVelectronirradiationhavebeenstudiedbyusingavariable-energypositronbeam.Itwasfoundthatafterannealing,thedefectconcentrationinn-type6H-SiCdecreasedduetorecombinationwithinterstitials.Whenthesamplewasannealedat1400℃for30mininvacuum,a20-nmthicknessSilayerwasfoundonthetopoftheSiCsubstrate,thisisadirectproofoftheSiatomsdiffusingtosurfacewhenannealedathightemperaturestages.After10MeVelectronirradiation,forn-type6H-SiC,theSparameterincreasedfrom0.4739to0.4822,andtherelativepositron-trappingratewasabout27.878timesoftheoriginsample,thisshowsthattherearesomedefectscreatedinn-type6H-SiC.Forp-type6H-SiC,itisveryunclear,thismaybebecauseoftheoppositechargeofvacancydefects.

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简介：Theoreticalbeamintensitydistributionisderivedfortheneutral-beam-injectionionsourcewithamulti-slotextractioninEAST.Thebeamintensityprofile,bothalongandperpendiculartotheinjectingdirectionandthebeampowerdepositiontotheinnerelementsintheneutralbeaminjector(NBI)areevaluated.Theresultsindicatethatthetransversebeamintensityismuchhigherthanthelongitudinalone.Thisstudycouldprovideinformationforthedesignofvacuumsystem,structureofinnerelementsandcoolingsystemoftheneutralbeaminjectorinEAST.

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简介：TooptimizetheoperationparametersofthebeamlineofNBIonHL-2A,featuresofthebeamline,includingthebeamprofileandthepowerdepositedoncomponentsandinjectedintothetokamakplasma,weremeasured.Theoperationalparametersofthefoursourcesonthebeamlinewereoptimizedwiththemonitorofthebeamprofileandbeampower,andthetransmissionefficiencyoftheNBIinjectedpowerwasthereforeincreased.AbeamdiagnosticsystemforthebeamlineoftheNBIsystemonHL-2Aaswellasthediagnosedresultswasalsopresented.

简介：Wereportthefabricationofsubmicrometerpitsarray(SP-array)on6H-SiCsurfacebytheinterferenceoftwofemtosecondlaserbeams.FormationmechanismsandopticalabsorptionofSP-arrayarestudied.Therelativereflectivityandtransmissivityofwhitelightdecreaseto10%ofthevaluesofSiCcrystal,andtheopticalabsorptionisenhancedto97%.Therelativereflectivityandtransmissivityofincidentangleswithintherangeof20°-60°arekeptbelow25%.TheenhancementmechanismofopticalabsorptionoftheSP-arrayisalsodiscussed.

简介：ＢｅａｍＭｏｄｕｌａｔｏｒｏｆＰｈｏｔｏｅｌｅｃｔｒｉｃＰｕｌｓｅ￥ＧｕＺｈｏｎｇｄａｏ；ＷａｎｇＷｅｉａｎｄＤｏｎｇＣｈｅｎｇｆｕＴｈｅｅｘｐｌｏｒａｔｉｏｎｏｆｎｕｃｌｉｄｅｆａｒｆｒｏｍｔｉｌｅβｓｔａｂｉｌｉｔｙｌｉｎｅ（ｅｘｏｔｉｃ...

简介：ＢｅａｍＤｉａｇｎｏｓｔｉｃＳｙｓｔｅｍｆｏｒＳＦＣ￥ＳｏｎｇＨａｉｈｏｎｇＴｈｅｄｉａｇｎｏｓｔｉｃｄｅｖｉｃｅｓｆｏｒｔｈｅｉｎｊｅｃｔｏｒＳＦＣｉｎｃｌｕｄｅ３ｍｏｖａｂｌｅｒａｄｉａｌｐｒｏｂｅｓｗｉｔｈ１０ｄｉｆｆｅｒｅｎｔｉａｌａｎｄｉｎ...

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简介：Neutralbeaminjection(NBI)isrecognizedasoneofthemosteffectivemeansforplasmaheating.A100slongpulseneutralbeamwith30keVbeamenergy,10Abeamcurrentanda100slongpulsemodulatingneutralbeamwith50keVbeamenergy,16AbeamcurrentwereachievedintheEASTneutralbeaminjectoronthetest-stand.ThepreliminaryresultssuggestthatEAST-NBIsysteminitiallypossesstheabilityoflongpulsebeamextraction.

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简介：ＲａｄｉｏａｃｔｉｖｅＩｏｎＢｅａｍＬｉｎｅｉｎＬａｎｚｈｏｕ￥ＺｈａｎＷｅｎｌｏｎｇ；ＧｕｏＺｈｏｎｇｙａｎ；ＬｉｕＧｕａｎｈｕａ；ＹｉｎＱｕａｎｍｉｎ；ＺｈｏｕＪｉａｎｑｕｎａｎｄＷａｎｇＹｉｆａｎｇＡｓａｎｅｗｆｒｏｎｔｉｅｒｉｎｎｕ...

简介：在在10年的放射性的同位素横梁工厂的核物理学的研究活动被考察，未来方向也被讨论。在象试验性的设备一样设计设备的概念的想法被介绍。特殊强调被给在RIBF获得的加亮的结果。

简介：Inordertosolvetheproblemofhighprecision,completeelectricinsulatingdetectionofthepressuremeasuringsystem,wehavedevelopedthethree-beaminterferometer.Inthispaper,theoperationprinciple,structureofthesystemandmeasuringresultsaregiven.

简介：Thedynamicresponseofthenon-linearelasticsimplysupportedbeamsubjectedtoaxialforcesandtransverseperiodicloadisstudied.Melnikovmethodisusedtoconsiderthedynamicbehav-iorofthesystemwhosepost-bucklingpathissteady.Theeffectofthehigherordertermsinthecon-trollingequationistakenintoaccount.Itisfoundthatthefifth-ordertermshaveagreatinfluenceonthedynamicbehaviorofthesystem.Theresultshowsthatthereexisteitherhomoclinicorbitsorhete-roclinicorbitsinthesystem.Inthispaper,thecriticalvaluesofthesystementeringchaoticstatesaregiven.Thediagramofanexampleisshown.

简介：Wededuceacompletewavepropagationequationthatincludesinhomogeneityofthedielectricconstantandpresentthispropagationequationincompactvectorform.Althoughsimilarequationsareknowninnarrowfieldssuchasradiowavepropagationintheionosphereandelectromagneticandacousticwavepropagationinstratifiedmedia,wedevelophereanovelapproachofusingsuchequationsinthemodelingoflaserbeampropagationinnonlinearmedia.Ourapproachsatisfiesthecorrespondenceprinciplesinceinthelimitofzero-lengthwavelengthitreducesfromphysicaltogeometricaloptics.

简介：Inthispaper,theboundarystabiligstionoftbeTimoshenkoequationofanononiformbeam,withclarrmpedboundaryconditionatoneendandwitbbendingmomentandshearforcecontrolsattheotherend,isconsidered.Itisprovedthatthesystemisexponentiallystahilizablewhenthebendingmomentandshearforcecontrolsaresimultaneouslyappiied.Thefrequencydomainmethodandthemultipliertechniqueareused.

简介：Thedynamicresponseofastrain-softeningbeamsubjectedtoatransverseimpulsiveonitstipisinvestigated.Asofteningmoment-curvaturerelationisassumedforthebeamandaclosedformsolutionisobtainedforaspecialkindofload,whichshowsthatthereexistsasofteningregioninthebeamandthisre-gionpropagatesalongthebeam.Thisresultindicatesthat,exceptforthepossiblediscretesofteningpointswithrotationdiscontinuitycausedbythedeformationlocalization,theexistenceofthesofteningregionanditstravellingalongthebeamaretheessentialfeaturesofthedynamicresponseofastrain-softeningbeam.Theresultsalsoshowthatthefailureofthebeamshouldtakeplaceunderaspecialloadandthecriticalconditiononwhichthedynamicfailureoccursisgiven.

简介：Thequasi-conformingelementofthecurvedbeamandshallowcurvedbeamisgiveninthispaper.Numericalexamplesillustratethatthequasi-conformingelementsofthecurvedbeamandshallowcurvedbeamWhichisusedtoaooroximatethecurvedbeamhavebetteraccuracythanthestraightbeamelement.Thecurvedbeamelementconstructedbydisplacementmethodcannotsatislyrigidbodymotionconditionandthevervfinegridshavetobeusedinordertosatisfyrigidbodymotionconditionapproximately.Inthispaperitisprovedthatthestraightbeamelementandthequasi-conformingelementofthecurvedbeamandshallowcurvedbeam.whenelementsizeisreducedinfinitely,haveconvergenceratewiththesameorderO(l~2)andwhenregulurelementsareused,Iistheelementlength.