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飞秒激光成丝诱导电晕放电的实验研究 Title:ExperimentalStudyofFilament-InducedCoronaDischargebyFemtosecondLaser Abstract: Thephenomenonoffilament-inducedcoronadischargehasgainedconsiderableattentionduetoitspotentialapplicationsinvariousfields,suchasairpollutioncontrol,plasmaphysics,andhigh-voltageengineering.Inthisstudy,weconductedanexperimentalinvestigationofthefilament-inducedcoronadischargeusingfemtosecondlasertechnology.Theaimwastounderstandtheunderlyingmechanismsandexplorethepossibilitiesofutilizingthisphenomenonforpracticalapplications. Introduction: Coronadischargereferstoaphenomenonwherealocalizedregionsurroundingaconductorexperiencesionizationandelectriccurrentflowduetotheelectricfieldstrengthexceedingacertainthresholdvalue.Filament-inducedcoronadischarge,ontheotherhand,occurswhenahigh-intensitylaserpulsegeneratesahigh-densityplasmafilamentthattriggersthecoronadischargeinthesurroundingatmosphere.Thisuniquemethodoffersadvantagesintermsoffinecontrol,speed,andprecisioncomparedtotraditionalelectricaldischargetechniques. ExperimentalSetup: Ourexperimentalsetupconsistedofafemtosecondlasersystem,high-voltagepowersupply,gaschamber,anddiagnosticstools.Thefemtosecondlasersystemprovidedultrashortlaserpulseswithpulsedurationsinthefemtosecondrangeandhighpeakpowers.Thehigh-voltagepowersupplygeneratedavoltagepotentialacrosstwosharpelectrodes,resultinginastrongelectricfield.Thegaschambercontainedthetestingatmosphere,whichcouldbeadjustedtosimulatedifferentenvironmentalconditions. ResultsandDiscussion: Theexperimentalobservationsrevealedthatunderappropriatelaserpulseenergyandatmosphericconditions,thefemtosecondlasercouldgenerateaplasmafilamentthattraversesthegapbetweenthesharpelectrodes.Thisplasmafilamentthenactsasapathwayforcoronadischargetooccur.Weobservedcoronadischargeswithvariouscharacteristics,includingdifferentpatterns,intensities,andbranchingbehaviors.Thedischargecharacteristicswerestudiedandanalyzedbasedonparameterssuchaslaserpulseenergy,gascomposition,electrodegeometry,andspacing. Fu