相对论速调管的理论研究及数值模拟-物理电子学专业论文.docx

ABSTRACTABSTRACTThesmallsignalspace—chargewavetheoryofintenserelativisticelectronbeams(I附!B)isanalysed．Theexpressionoflimitingcurrent，thedispersionrelationofIREB，thetransformmatrixofIREBwhichisindrifttube，andthevoltagegainequationareobtained．AftercomparedwithclassicKlystrontheory，wefindout thatthespacepotentialvoltageofIREBisSOlargethatitCannotbeignoredincalculation．Becauseofthepotentialvoltage，theIREBwillbelostenergywhiletranslatingindrifttube．Thenon-liner self-consistent formulations ofideal annular IREB are obtained．theseformulationswillbethesameasthelinearorstaticequationwhenwesetthemintospecialsituation．Althoughtheequationsarehardtosolve，butwecanstilldropsome unimportantfactors，andobtaintheharmoniccontentofmodulatedIREBcurrent．Baseonthese，wefindoutsomedifferentcharacteristicsofRelativisticKlystronAmplifierORKA)，thecurrentmodulationwill beenhancedbyit’Sownpacepotentialvoltage．ByusingofMAGIC，twokindsofOpenresonatorsimulationmethodareintroduced，theadvantagesanddisadvantagearecompared．Baseonsomesimpleresonatortheory,theQvalue，IVQvalueCanbecalculatedsystemically．thosemethodsnotonlysuitforklystronresonator,butalsosuitforallkindsofcomplicatedcavity．Oneo．fIREBimportantcharacteristicsisanalysed，pacepotentialvoltageandlimitingcurrentaresimulatedandcomparedwiththeory,theresultsareconsistent．Byusingofthetheoryandsimulationmethodsabove，theinjectcavity，bunchercavityandoutputcavityareanalysedseparably．WithAnannualelectronbeamofvoltage500kV,andcurrent310．averageoutputmicrowavepower455MWandpeak power1．3GMisobserved,bandwidthis60MHz，theefficiencyis30．3％。thegainiSabout36．8dB．andthefrequencyis2．85GHz，Theamplitudeandphaseofoutputmicrowaveisstable．TheefficiencyistheMghestofthreecavityklystron．Keywords：RelativisticKlystronAmplifier(RKA)，High-powerMicrowave(HPM)，IntenseRelativisticElectronBeams(IREB)，Particle．in—cell Simulation，ResonantCavityⅡ独创性声明本人声明所呈交的学位论文是本人在导师指导下进行的研究工作及取得的研究成果。据我所知，除了文中特别加以标注和致谢的地方外，论文中不包含其他人已经发表或撰写过的研究成果，也不包含为获得电子科技大学或其它教育机构的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的任何贡献均