简介：Polymerethyleneoxide(PEO)functionalfilmscanbeusedasamaterialforbiocompatibleresearch.Inthispaper,weinvestigatedthestructuresofPEO-likefilmspolymerizedonSisurfacewithdiethlyeneglycoledimethylether(DEGDME)astheprecursorandArasthedilutiongasbyplasmaenhancedchemicalvapordeposition(PECVD).Andthepulseplasmamodelwasemployedtopolymerizethefunctionalfilms.ThechemicalstructureofthecoatingswasinvestigatedbyFouriertransforminference(FTIR)andX-rayphotoelectronspectroscopy(XPS).TheresultsindicatethatPEO-likestructurefilmscanbepolymerizedbyDEGDME/Arplasma.TheconcentrationofC-Ofunctionalgroupspolymerizedinthelohgplasma-offtimewasmuchhigherthanthatintheshortplasma-offtime.Withthesamedischargeparameters,moreover,theC-Oratioinpolymersincreasedwithahigherinjectedpower.

简介：Undercoronalconditions,thesteadystaterate-equationsareusedtocalculatetheinter-stagelineratiosbetweenLi-likels22p(2p3/2)→ls22s(2S1/2)andHe-likels2p(1P1)→ls2(1So)transitionsforTiintheelectronictemperaturerangesfrom0.1kevto20keV.Theresultsshowthatthetemperaturesensitivitiesarehigherattheelectronictemperaturelessthan5000eVandthetemperaturesensitivitieswilldecreasewiththeincreaseofelectronictemperature.

简介：Inthisresearch,thenonlinearevolutionofjet-likespikesinthesingle-modeablativeRayleigh-Taylorinstability(ARTI)inthepresenceofpreheating,isstudiednumerically.Itisdemonstratedthatthepreheatingplaysanessentialroleintheformationofjet-likespikesinthenonlinearARTI.Theevolutionofjet-likespikesintheARTIwithpreheatingconsistsofthreestageswithdistinctlydifferentdistinguishingfeatures.Intheearlystage,thepreheatingcontributestosignificantlyincreasethedensity-gradientscalelengthandbroadenthevelocityprofileoftheablationsurface,wheretheformercanreducethelineargrowthoftheARTIandmitigatethegrowthofitsharmonics.Inthemiddlestage,theablativeKelvin-Helmholtzinstabilityisdramaticallysuppressedduetotheablationeffects.Inthelatestage,thejet’slength(i.e.bubble-spikeamplitude)isfurtherincreasedbythebubbleaccelerationinthehighlynonlinearARTI,resultingeventuallyintheformationofjet-likespikes.

简介：Theq-profilecontrolproblemintheramp-upphaseofplasmadischargesisconsid-eredinthiswork.Themagneticdiffusionpartialdifferentialequation(PDE)modelsthedynamicsofthepoloidalmagneticfluxprofile,whichisusedinthisworktoformulateaPDE-constrainedop-timizationproblemunderaquasi-staticassumption.Theminimumsurfacetheoryandconstrainednumericoptimizationarethenappliedtoachievesuboptimalsolutions.Sincethetransientdy-namicsispre-givenbytheminimumsurfacetheory,thenthismethodcandramaticallyacceleratethesolutionprocess.Inordertoberobustunderexternaluncertaintiesinrealimplementations,PID(proportional-integral-derivative)controllersareusedtoforcetheactuatorstofollowthecomputationalinputtrajectories.Ithasthepotentialtoimplementinreal-timeforlongtimedischargesbycombiningthismethodwiththemagneticequilibriumupdate.

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