Abstract: Thesecondaryelectronyield (SEY) hasgreatinfluenceontheefficiencyofthecollectorofspacetravelingwavetube.Therefore,
theefficiencyofcollectorwasimprovedbyreducingthesecondaryelectronyieldofthematerial′ssurfaceofcollector. TheOFHCcoppersamplewastreatedwithchemicaletching.Afterchemicaletching,somemicroporous arraystructureswereremainedonthesample.Thenthesecondaryelectronyieldofthesamplewasm easuredbythesecondaryelectronyieldmeasurementplatform.Andtheresultshowsthatcomparingwiththeoriginalsamplewhichisnottreated,themaximumofSEYdecreasesfrom1.33to0.96.And theSEYissuppressedwell.ThentheSEYcurvesobtainedfromSEYmeasurementplatformwereused  inthedesign ofSTWTcollector.TostudytheinfluenceoftheSEY,threecollectormodelswereusedtocalculate theefficiencyofthemodelswithsimulationsoftware.Itisverifiedthattheefficiencyofthe threecollectorsareimprovedfrom80.1%,57.5%,42.1%to82.55%,62.6%,59.2%,respectively.ThemethoddiscussedwillbehelpfulfortheSTWTdesign.

Key words: spacetravelingwavetube, collector, secondaryelectronyield, oxygenfreehighthermalconductivitycopper, chemicaletching oxygenfreehighthermalconductivitycopper, chemicaletching