简介：X-rayThomsonscatteringtechniquefordiagnosingdenseplasmawasdemonstratedonShenguang-Πlaserfacility.Laserplasmax-raysourceoftitaniumHe-αlines(～4.75keV),generatedbylaserbeam(1.5kJ/527nm/2ns)heatedtitaniumthinfoil,wasusedasx-rayprobebeam.Thex-rayprobewasthenscatteredbycoldCHfoamcolumnof1g/cm3density.Thescatteredradiationat90wasdiffractedbypolyethyleneterephthalate(PET)crystalandrecordedonx-raycharge-coupleddevice.Well-definedscatteringspectrawereobtainedwithgoodsignaltonoiseratio.

简介：道德认知不能仅停留于知识层面。它最终应该内化为学生的一种品质,升华为学生的一种精神,而传统的教学方法使学生获得的道德认识却难以实现这一升华。因此,我们在思想道德教育中必须融入现代教育理念,让学生从自身实际出发,以兴趣为先导,以内需为动力,以实践为载体,积极倡导自主学习、合作学习与探究学习。使学生的主体性得到充分的发挥,让学生在主动思考、写作探索、亲身经历中自主地去发掘,自主地去构建科学的道德认知,为自身思想道德素质的全面提高创设扎实的基础。

简介：ThisworkinvestigatedC2F6/O2/ArplasmachemistryanditseffectontheetchingcharacteristicsofSiCOHlow-kdielectricsin60MHz/2MHzdual-frequencycapacitivelycoupleddischarge.FortheC2F6/Arplasma,theincreaseinthelow-frequency(LF)powerledtoanincreasedionimpact,promptingthedissociationofC2F6withhigherreactionenergy.Asaresult,fluorocarbonradicalswithahighF/Cratiodecreased.Theincreaseinthedischargepressureledtoadecreaseintheelectrontemperature,resultinginthedecreaseofC2F6dissociation.FortheC2F6/O2/Arplasma,theincreaseintheLFpowerpromptedthereactionbetweenO2andC2F6,resultingintheeliminationofCF3andCF2radicals,andtheproductionofanF-richplasmaenvironment.TheF-richplasmaimprovedtheetchingcharacteristicsofSiCOHlow-kfilms,leadingtoahighetchingrateandasmoothetchedsurface.

简介：Athreedimensionalsteady-statemagnetohydrodynamicmodelisdevelopedforthearcplasmainaDCsubmergedelectricarcfurnacefortheproductionoffusedMgO.Thearcisgeneratedinasmallsemi-enclosedspaceformedbythegraphiteelectrode,themoltenbathandunmeltedrawmaterials.Themodelisfirstusedtosolveasimilarprobleminasteelmakingfurnace,andthecalculatedresultsarefoundtobeingoodagreementwiththepublishedmeasurements.ThebehaviorofarcswithdifferentarclengthsisalsostudiedinthefurnaceforMgOproduction.Fromthedistributionofthearcpressureonthebathsurfaceitisshownthatthearcplasmaimpingementislargeenoughtocauseacrater-likedepressiononthesurfaceoftheMgObath.Thecirculationofthehightemperatureairundertheelectrodemayenhancethearcefficiency,especiallyforashorterarc.

简介：Thisworkinvestigatesinternalplasmaprocessparametersusingahairpinresonanceprobeandopticalemissionspectroscopy.ThedependenceofelectrondensityandatomicfluorineonthepercentageofoxygeninanSF6/O2dischargewasmeasuredusingthesemethods.AnRIEOxfordInstruments80pluschamberwasusedfortheexperiments.Twodifferentprocesspowers(100Wand300W)ataconstantpressure(100mTorr)wereused,anditwasfoundthattheopticalemissionintensityofthe703.7nmand685.6nmlinesofatomicfluorineincreasedrapidlyasoxygenwasaddedtotheSF6discharge,reachedtheirmaximumatanO2fractionof20%andthendecreasedwithfurtheradditionofoxygen.TheplasmaelectrondensitywasalsostronglyinfluencedbytheadditionofO2.

简介：WehavedevelopedaplasmaetchingsimulatortoinvestigatetheevolutionofpatternprofilesinSiO2materialunderdifferentplasmaconditions.Thismodelfocusesonenergyandangulardependentetchingyield(physicalsputteringinthispaper),neutralandionangulardistributions,andreflectionofionsorneutralsonthesurfaceofaphotoresistorSiO2.TheeffectofpositivechargeaccumulationonthesurfaceofinsulatedmaskorSiO2isstudiedandthechargeaccumulationcontributestoadeflectionofiontrajectory.Thewaferprofileevolutionhasbeensimulatedusingacellular-automata-likemethodunderradio-frequency(RF)biasanddirect-current(DC)bias,respectively.Onthebasisofthecriticalroleofangulardistributionofionsorneutrals,thewaferprofileevolutionhasbeensimulatedfordifferentvariancesofangles.Observedmicrotrenchinghasbeenwellreproducedinthesimulator.Theratioofneutralstoionshasbeenconsideredandtheresultshowsthatbecausetheneutralsarenotacceleratedbyanelectricfield,theirenergyismuchlowercomparedwithions,sotheyareeasilyreflectedonthesurfaceofSiO2,whichmakesthetrenchshallower.

简介：Themicroscopiceffectivechargesinmirrornuclei51Mnand51Feareinvestigatedwiththeparticle-vibrationcouplingmodelbasedontheself-consistentSkyrme-Hartree-Fockandcontinuumrandom-phase-approximationapproaches.Theisovectorpartsarepredictedtobearound0.15,andtheprotoneffectivechargesarearound1.25e,whichislessthantheempiricalvalueofeeffp=1.5e.Themicroscopiceffectivechargesinneutronrich51Mnareabout10%lessthanitsprotonrichmirror.TheseeffectivechargesarecombinedwiththeshellmodeltocalculatethereducedelectricquadrupoletransitionprobabilityB(E2)valuesin51Mnand51Fe.ItturnsoutthatthemicroscopiceffectivechargeshavewellreproducedtheB(E2)valuesanditsratiointheterminatingstates.