简介:An8-channelHCNlaserinterferometerwillbeinstalledonHL-2Ainnearterm.InordertogetthespatialprofileoftheelectrondensityBarrnumericalmethodisadoptedtorealizetheAbelinversion.InthisarticletheresultoftheAbelinversionbyMatlabGUIisgivenwhichcanbeupdatedtoprocessthemeasureddataofthe8-channellaserinterferometerandprovidethespatialdistributionoftheelectrondensity.
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简介:Thecharacteristicsofhomogeneousdischargesinmixedgasesofhydrogendilutedsilaneandargonatatmosphericpressureareinvestigatednumericallybasedonaone-dimensionalfluidmodel.Thismodeltakesintoaccounttheprimaryprocessesexcitationandionization,sixteenreactionsofradicalswithradicalsinsilane/hydrogen/argondischargesandtherefore,canadequatelyrepresentthedischargeplasma.Weanalyzetheeffectsofveryhighfrequency(VHF)onthedensitiesofspecies(e,H,SiH3,SiH+3andSiH2)insuchdischargesusingthemodel.ThesimulationresultsshowthatthedensitiesofSiH3,SiH+3,H,andSiH2increasewithVHFwhentheVHFrangesfrom30MHzto150MHz.Itisfoundthatthedepositionrateofμc-Si:HfilmdependsontheconcentrationofSiH3,SiH+3,SiH2,andHintheplasma.TheeffectsofVHFonthedepositionrateandtheamountofcrystallizedfractionforμc-Si:Hfilmgrowthisalsodiscussedinthispaper.
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简介:Inordertotransfertheheatfromthearmortothecoolant,tungstenhastobeconnectedwithacopperheatsink.Thejointtechnologyisthemostcriticalissueformanufacturingplasmafacingcomponents.Consequently,thereliabilityofthejointsshouldbeverifiedbyagreatnumberofhigh-heat-flux(HHF)teststosimulatetherealloadconditions.W/CubrazedjointtechnologywithsliverfreefillermetalCuMnNihasbeendevelopedatSouthwesternInstituteofPhysics(SWIP).Screeningandthermalfatiguetestsofonesmall-scaleflattileW/CuCrZrmockupwereperformedona60kWelectron-beamMaterialtestingscenario(EMS-60)constructedrecentlyatSWIP.Themodulesuccessfullysurvivedscreeningtestwiththeabsorbedpowerdensity(Pabs)of2MW/m2to10MW/m2andthefollowing1000cyclesatPabsof7.2MW/m2withouthotspotsandoverheatingzonesduringthewholetestcampaign.MetallurgyandSEMobservationsdidnotfindanycracksatbothsidesandtheinterface,indicatingagoodbondingofWandCuCrZralloy.Inaddition,finiteelementsimulationsbyANSYS12.0underexperimentalloadconditionswereperformedandcomparedwithexperimentalresults.
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简介:Athreedimensionalsteady-statemagnetohydrodynamicmodelisdevelopedforthearcplasmainaDCsubmergedelectricarcfurnacefortheproductionoffusedMgO.Thearcisgeneratedinasmallsemi-enclosedspaceformedbythegraphiteelectrode,themoltenbathandunmeltedrawmaterials.Themodelisfirstusedtosolveasimilarprobleminasteelmakingfurnace,andthecalculatedresultsarefoundtobeingoodagreementwiththepublishedmeasurements.ThebehaviorofarcswithdifferentarclengthsisalsostudiedinthefurnaceforMgOproduction.Fromthedistributionofthearcpressureonthebathsurfaceitisshownthatthearcplasmaimpingementislargeenoughtocauseacrater-likedepressiononthesurfaceoftheMgObath.Thecirculationofthehightemperatureairundertheelectrodemayenhancethearcefficiency,especiallyforashorterarc.