欢迎来到天天文库
浏览记录
ID:57672738
大小:2.43 MB
页数:27页
时间:2020-08-31
《宇宙射线简介.pptx》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、AnIntroductiontoCOSMICRAYSWEIHONGJIANGSESS,PKU1785CharlesCoulombDiscoveredthatchargedbodyintheairbecomesdischarged1909TheodorWulfDiscoveredhigherlevelsofradiationatthetopoftheEiffelTowerthanatitsbasewithanelectrometerdevelopedbyhimselfDiscoveryofCosmicRays1912Vic
2、torHessFoundtheionizationrateincreasedapproximatelyfourfoldovertherateatgroundlevelatanaltitudeof5300metersMadeaballoonascentduringanear-totaleclipseandruledouttheSunastheradiation'ssourceWontheNobelPrizeinPhysicsin1936DiscoveryofCosmicRays1932C.AndersonDiscovered
3、theanti-electron1936S.NeddermeyerandC.AndersonDiscoveredthemuon1938PierreAugerandRolandMazeDiscoveredExtensiveAirShower1946G.RochesterandC.ButlerDiscoveredK01965A.PenziasandR.WilsonDiscoveredCBMRadiationDiscoverywithCosmicRaysAtomicnucleizoomingthroughspace90%prot
4、ons,9%heliumnuclei,nearly1%electronsandheavynucleus.Othersareneutrinos,GammaraysandantimatterPrimaryCosmicRaysElementalabundanceintheCRsandtheGalaxy(RelativetoH)PrimaryCosmicRaysTheenergyspectrumforcosmicraysPrimaryCosmicRaysParticlesgeneratedinthecascadeprocessth
5、atstartedbyPrimaryCRshitothernucleusintheatmosphereCantravelfasterthanthespeedoflightinair(stillslowerthanthatinvacuum)SecondaryCosmicRaysVerticalfluxesofcosmicraysintheatmosphereSecondaryCosmicRaysAnextensivecascadeofionizedparticlesandelectromagneticradiationpro
6、ducedintheatmosphereCascade:Anincidentparticle,whichcouldbeaproton,anucleus,anelectron,aphoton,or(rarely)apositron,strikesamoleculeintheairsoastoproducemanyenergetichadronsTheunstablehadronsdecayintheairspeedilyintootherparticlesandelectromagneticradiation,whichar
7、epartoftheshowercomponentsExtensiveAirShowerElectromagneticEASHadron-inducedEASExtensiveAirShowerShowerparticletracks:Proton(Simulation)ExtensiveAirShowerSpaceExperimentAMS[AlphaMagneticSpectrometer]OSSE[OrientedScintillationSpectrometerExperiment]NINA[NewInstrume
8、ntforNuclearAnalysis]PAMELA[PayloadforAntimatterMatterExplorationandLight-nucleiAstrophysics]EUSO[ExtremeUniverseSpaceObservatory]GLAST[Gamma-rayLargeAr
此文档下载收益归作者所有