简介：AnewpelletinjectionsystemwasinstalledontheEASTtokamakandpreliminaryexperimentswereperformedduringthe2012runcampaign.TypicalphenomenaassociatedwithdeuteriumpelletinjectionintoaplasmadischargehavebeenobservedincludingsuddenincreasesoftheelectrondensityandHα/Dαemissionintensityaswellasasignificantdecreaseinplasmaelectrontemperature.ProfileshavebeenstudiedinordertounderstandtheinfluenceofpelletfuellingonEASTdischarges.Eventhoughtheinjectorwasspecificallydesignedforplasmafuelling,ELMtriggeringusingthepelletinjectionhasalsobeentested.InordertofindappropriateparametersfortriggeringELMsinH-modeplasmas,scanningofthepelletinjectionspeedwasemployedforpelletsinjectedfromboththehighfieldsideandlowfieldsideoftheplasmacolumn.Ithasbeenobservedthatlow-speedpelletsinjectedintoH-modeplasmafromthelow-fieldsidecouldtriggeranELMfollowedbyanumberofsmallerinducedELMsatabout300Hz.

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简介：Flyashfromamunicipalsolidwasteincinerator(MSWI)withoutpreprocessing(originalflyash,OFA)wasmeltedbyadirectcurrent(DC)plasmaarcfurnacetoinvestigatehowthefeedformsgovernedtheresults.Dioxinsinfluegasfromstackandbag-filterash(BFA)weredetected.ThedistributionofheavymetalsofPb,Cd,As,andCralongthefluegasprocesssystemwasanalyzed.Throughacomparisonoftheresultsfordioxinsandheavymetalsinthisstudyandpreviouswork,carrying-overofflyashparticleswiththefluegasstreamcanbededuced.BasedonthemagneticinductionequationandNavier-Stokesequations,amagnetohydrodynamic(MHD)modelfortheplasmaarcwasdevelopedtodescribetheparticle-carryingeffect.Theresultsindicatethat,a.whenmelted,thefeedformsofMSWIflyashaffecttheresultssignificantly;b.itisnotpreferabletomeltMSWIflyashdirectly,andeffortsshouldbemadetolimitthemasstransferofOFAfromtheplasmafurnace.

简介：Opticalemissionspectroscopy(OES)usingthetraceraregasesofArandXehavebeencarriedoutinaradiofrequency(RF)drivennegativeionsourceatInstituteofPlasmaPhysics,ChineseAcademyofScience(ASIPP),inordertodeterminetheelectrontemperatureanddensityofthehydrogenplasma.Theline-ratiomethodsbasedonpopulationmodelsareappliedtodescribetheradiationprocessoftheexcitedstateparticlesandestablishtheirrelationswiththeplasmaparameters.Thespectrallinesfromtheargonandxenonexcitedstateatomswiththewavelengthof750.4and828.0nmareusedtocalculatetheelectrontemperaturebasedonthecoronamodel.Theargonionsemissionlineswiththewavelengthof480and488nmareselectedtocalculatetheelectrondensitybasedonthecollisionalradiativemodel.OEShasgiventhepreliminaryresultsoftheelectrontemperatureanddensitybyvaryingthedischargegaspressureandRFpower.Accordingtotheexperimentalresults,thetypicalplasmaparametersisTe2≈2-4eVandne≈1x1017-8x1017m^-3infrontofplasmagrid.