icrh天线电流和等离子体密度分布对等离子体加热效果影响的理论分析

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1、AbstractThetheoryresearchfortheeffectsofICRHantennacurrentandplasmadensitydistributiononplasmaheatingIoncyclotronRangeofFrequency(ICRF)heatinghasbeenverifiedtobeoneofthemainauxiliaryheatingmethodsinTokamaksbymanyexperimentsandtheory.ButwithincreasingofTokamakdevices,thedemandforthepow

2、erofICRFwavewhichiscoupledwithplasmaisincreasing.Sotheoptimizationschemeofhowtoimprovetheantennacouplingpowerisstillthefocusoftheresearchinthisfieldandcuttingedge.Becauseoftheparameterssuchastheantennastructure,thespacebetweenantennaandplasma,plasmadistributionhasanimportantinfluenceo

3、nelectromagneticwaveexcitationandspread.Inordertoreduceradio-frequencywavesenergylossesasmuchaspossibleandmaketheioncyclotronheatingantennacouplingefficiencybehigher,itisnecessaryforustodeeplystudyonthemechanismofioncyclotronresonanceheating.ThecouplingofIoncyclotronwavewithplasmaisnu

4、mericallystimulatedbyusingaplasmaslabmodelandathree-dimensionalantennamodel.TheMaxwellequationsinthevacuumandthefastmagnetosonicwaveequationsintheplasmaareresolvedrespectivelybyGreen'sfunctionmethodandavariablesteplengthfourth-orderRunge-Kuttamethod,ontheconditionthatfastmagnetosonicw

5、avesareabsorbedcompletelyintheplasmaandelectromagneticcharactersoftheplasmaaredescribedwiththedielectrictensorof“cool”plasma.Variationofantennacouplingpowerversusthecentralregionofplasmadensity,parabolicfringedensity,thescrape-offlayeredgedensity,thepoloidalphasedifferenceorthetoroida

6、lphasedifferencearecalculated.Thesimulationresultsshowthatundercertainexperimentalconditions,Ioncyclotronwaveisbettercoupledwithplasmabyincreasingthecentralregionofplasmadensityorthescrape-offlayerdensity,aswellasdecreasingdensitygradientoftheparabolicregionortheexponentialfall-offreg

7、ion,andwhenthetoroidalphasedifferenceequalsto,theioncyclotronresonanceheatingeffectisII万方数据best.Keywords:Ioncyclotronresonanceheating(ICRH);PlasmaCoupling;Plasmadensity;AntennaphasedifferenceIII万方数据第一章引言1.1能源问题与核聚变能源问题是当今世界的主题。目前全球能源的分类如图1.1，其中主要以化石燃料为主，但随着人们对能源需求量的不断增大，估计全世界化石燃料的蕴藏量

8、将会在半个