中国空间科学技术

Chinese Space Science and Technology ›› 2017, Vol. 37 ›› Issue (2): 61-65.doi: 10.16708/j.cnki.1000-758X.2017.0037

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Improvingtheefficiencyofthecollectorofspacetravelingwavetubewithmicromachiningtechnology

 BAI  Chun-Jiang1, CUI  Wan-Zhao1,*, YE  Ming2, HE  Yong-Ning2   

  1. 1 NationalKeyLaboratoryofScienceandTechnologyonSpaceMicrowave,ChinaAcademyofSpaceTechnology (Xi′an)，Xi′an710100，China
    2SchoolofElectronicandInformationEngineering,Xi′anJiaotongUniversity，Xi′an710049,China
  • Received:2016-08-31 Revised:2017-02-16 Published:2017-04-25 Online:2017-03-21

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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