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EAST瞬态电场测量系统研究 Abstract Inrecentyears,themeasurementoftransientelectricfieldshasdrawnincreasingattentioninthefieldofelectricpowerengineeringandelectromagneticcompatibility.TheEAST(ExperimentalAdvancedSuperconductingTokamak)measurementsystemisadevicethatmeasuresthetransientelectricfieldsproducedduringplasmadischargeintheEASTexperimentaldevice.Inthispaper,weintroducetheEASTmeasurementsystemanditscomponentsanddiscussitsdifferentmeasurementmodes.Additionally,wepresentresultsobtainedusingthesystemandtheirsignificanceforplasmadischargeresearch. Keywords:Transientelectricfields,EAST,plasmadischarge. Introduction Inplasmadischargeresearch,measuringthetransientelectricfieldsproducedduringdischargeisofcrucialimportance.Transientelectricfieldsareassociatedwithplasmaphenomenasuchasplasmadisruptionsandtheexcitationofplasmawaves.Therefore,measuringthesefieldsisessentialforunderstandingplasmabehaviorandmitigatingharmfulplasmaeffects.TheEASTexperimentaldeviceisatokamakthatusesmagneticfieldstocontainaplasma.EASTisoneofthemostadvancedtokamaksintheworldandhasbeenusedtoconductnumeroushigh-temperatureandhigh-densityplasmaexperiments. TheEASTmeasurementsystemisadevicethatmeasuresthetransientelectricfieldsproducedduringplasmadischargeintheEASTdevice.Thesystemconsistsofasetofdifferentmeasurementdevices,includingaRogowskicoil,amagneticprobe,andacapacitiveprobe.Eachdeviceisoptimizedtomeasuredifferentaspectsofthetransientelectricfields. MeasurementModes TheEASTmeasurementsystemhasthreedifferentmeasurementmodes,includingthedirectmode,theintegrativemode,andthedifferentialmode. 1.DirectMode Thedirectmodemeasuresthetransientelectricfielddirectlyusingacapacitiveprobe.Thecapacitiveprobemeasurestheelectricfieldstrengthandthedirectionoftheelectricfieldvector.Theprobeiscalibratedtomeasureelectricfieldsupto20kV/m,whichissufficientformostplasmadischargeexperiments.Thismodeisoptimalformeasuringtheelectricfieldsneartheplasmaboundaryandforinvestigatingthepropagationofwavesintheplasma. 2.IntegrativeMode The