bepcⅱ-linac试验束次级粒子分析与e3线性能-研究

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1、producesalargenumberofsecondaryparticles(protons，neutrons，gammaphones，7cs，positronsandelectrons)．TheenergyspectrumandangulardistributionofthesecondaryparticlesaresimulatedwiththeGeant4code．Theresultsindicatethattheprotonsofover35MeVhaveayieldof3．97×108

2、S一1andfluxof6．32×105s-1．cm-2．Measurementatfixed．angleof41。magneticspectrometeroftheBEPCII—LINACTest-Beamisconsistentwiththesimulationresults．ProtonsofsecondarybeamatBEPCII—LINACTest—BeamcanbeusedinSingleEventEffects(SEE)researchofthesemiconductordevice

3、s．Atthesametime，thispaperalseintroducedmagneticspectrometeranddetectorsystemontheBEPCII-E3testbeam，andonwhichsimulatedandtested．Thetestresultsshowthatmomentumresolutionofsingleparticeisbetterthan0．5％．positionseparatingofdouble—particeislessthan5mm．Dete

4、ctionefficiencyofthesingleMomentum600MeV／cparticleis62％，theelectronicenergylossforthe7．3MeV，theprotonenergylossis24．2MeV，兀mesonenergylossis5．2MeV，whichsatisfythedesignparametersofthemagneticspectrometertoserviceusers．Thispapercoversthefollowingaspects：

5、briefintroductiontoBEPCII—LINACTestBeamFacility(TBF)，MonteCarlosimulationmethodandGEANT4simulationsoftwareandROOTanalysissoftware，simulationofsecondaryparticlesandmeasurementoftheprotonspectrum，designandtransformationoftheE3Testbeamline，performancemeas

6、urementoftheE3Testbeam1ine．KEYWORDS：Testbeam，Secondaryparticles，SEE，Magneticspectrometer,GEANT4，ROOTV目录ABSTRACT⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．⋯⋯⋯⋯⋯⋯⋯⋯⋯．．IIf目录⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯VI第一章引言⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．1第二章BEPCII．LINAC上试验束(T

7、BF)装置的介绍⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．42．1高能物理研究所介绍⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．42．2北京正负电子对撞机(BEPC11)简介⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．62．2．1电子直线加速器⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯72．2．2束流输运线和储存环⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯82．3试验束装置(TBF)‘1引⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．92．3．1E1束流线(E1Line)⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯112．3．2E

8、2束流线(E2Line)⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯122．3．3E3束流线(E3Ljne)⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯13第三章MonteCarIo系统模拟方法及GEANT4模拟软件与ROOT分析软件⋯⋯⋯．163．1MonteCarlo系统模拟方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．163．1．1蒙特卡洛系统模拟方法的特征汹3⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯173．2探测器模拟框架及GEANT4模拟软件与工具包⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯233．2．1