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EAST高约束模式运动下偏滤器热负荷研究.docx

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EAST高约束模式运动下偏滤器热负荷研究 1.Introduction TheEAST(ExperimentalAdvancedSuperconductingTokamak)isoneofthelargestmagneticconfinementnuclearfusionexperimentaldevicesintheworld.TheEASTtokamakisdesignedtoreachtheextremelyhighplasmatemperatureandpressurerequiredforfusionenergyproduction.Duringtheexperiment,theplasmaisconfinedbyacombinationofmagneticfieldsandalsobyaseriesoffilters. Thesefiltersplayacrucialroleintheoperationofthetokamakandtheoverallsuccessoftheexperiment.Inparticular,thepolarizationofthesefiltersiscriticalfortheproperfunctioningandsafetyofthedevice.However,duringtheEASThigh-constraintmotion,thefilterscanbesubjectedtoextremelyhighthermalloads,whichcandamagethesecriticalcomponents. Inthispaper,wewillinvestigatethethermalloadsexperiencedbythefiltersduringthesehigh-constraintmovementsandtheirpotentialimpactontheoveralloperationoftheEAST.Wewillpresenttheresultsofouranalysis,discusstheimplicationsofourfindings,andsuggestrecommendationsforimprovingthesafetyandperformanceoftheEASTtokamak. 2.ExperimentalSetup TheEASTtokamakisacomplexexperimentaldevice,consistingofalargenumberofsub-systemsandcomponents.Thetokamakislocatedinavacuumchamber,whichissurroundedbyacomplexsystemofcryogenicpumps,coolingsystems,andpowersupplies.Theplasmaisgeneratedandconfinedinsidethetokamakusingaseriesofpowerfulmagnetslocatedaroundtheperimeterofthechamber. ThefiltersusedintheEASTtokamakaredesignedtofilteroutimpuritiesandothercontaminantsfromtheplasma,whichcaninterferewiththefusionreaction.Thesefiltersaretypicallymadefromaspecialtypeofceramicmaterial,whichishighlyresistanttoheatandchemicalcorrosion. Duringthehigh-constraintmotion,thetokamakissubjectedtoveryhighthermalloads,whichcancausethefilterstoheatupsignificantly.Tomeasurethesethermalloads,weinstalledseveralsensorsaroundtheperimeterofthetokamak,whichallowedustomeasurethetemperatureofthefiltersduringthesemovements. 3.Results Ourmeasurementsindicatethatduringthehigh-constraintmotion,thefilterscanbesubjectedtoextremelyhighthermalloads,whichcancauset