›› 2017, Vol. 37 ›› Issue (2): 1-10.doi: 10.16708/j.cnki.1000-758X.2017.0031

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Surfacecharginganalysisinducedbyelectronbeamimpactdielectric

WANG  Dan1, HE  Yong-Ning1,*, LI  Yun1,2   

  1. 1SchoolofElectronicandInformationEngineering,Xi′anJiaotongUniversity,Xi′an710049,China
    2NationalKeyLaboratoryofScienceandTechnologyonSpaceMicrowave,ChinaAcademyofSpace〖DW〗Technology(Xi′an),Xi′an710100,China
  • Received:2016-08-31 Revised:2017-03-02 Online:2017-04-25 Published:2017-03-17

Abstract: Forexistingmultipactoroccurredindielectricmicrowavecomponents,moreattentionispaidtomultipactorsourceandsuppressionfromtheaspectofresonanceandemittedelectronyield,whilethestudyaboutinfluenceofsurfacepotentialonmultipactorisrarelyreported.Secondaryelectronemissioncharacteristicswereanalyzed.Finalsurfacepotentialandelectronimpactenergywereemphaticallystudiedwhenelectronbeamwithconstantenergysostenutoimpactedthedielectricsurfacewithvariousinitialsurfacepotential.Surfacepotentialandelectronimpactenergywerecalculatedwhenthesystembecamestable.Calculateddataindicatesthatsteadystateofthesystemisremarkablyinfluencedbyprimaryenergyandthesecondcriticalenergy.Theinfluenceofsurfacepotentialonsecondaryelectronemissionwassystematicallystudiedwhenelectronswithsingleandcontinuousenergyimpactedthedielectricsurface.An-energyshiftingofcriticalenergyisrevealedwhensurfacepotentialisφ.Forelectronbeamwithcontinuousincidentenergy,impactenergyrangeisdramaticllyeffectedbysurfacepotentialofthedielectric,andtheriskofmultipactorisfurtherinfluenced.

Key words: spacecraftsurfacecharging, secondaryelectronemission, impactenergy, surfacepotential, multipactor