利用漂移室信息計(jì)算北京譜儀事例起始時(shí)間的方法研究.pdf

1、湖南大學(xué)碩士學(xué)位論文利用漂移室信息計(jì)算北京譜儀事例起始時(shí)間的方法研究姓名：張令申請學(xué)位級(jí)別：碩士專業(yè)：微電子學(xué)與固體電子學(xué)指導(dǎo)教師：曾云20070407利用漂移室信息計(jì)算北京譜儀事例起始時(shí)間的方法研究IIAbstractTheBeijingElectronPositronCollider(BEPC)BeijingSpectrometer(BES)inIHEP(InstituteofHighEnergyPhysics)ofCAS(Chin

2、eseAcademyofSciences)asanationalsignificantscientifictechnologicalprojectareunderupgradetosatisfythehigherrequirementsfromthephysicalanalysisthephysicalarm.Thismakestheofflinedataprocessingsoftwaresystemneedredesigningre

3、developing.Theeventreconstructionsubsystemthatistheimptantceintheofflinesoftwaresystemisoneofimptantpartofthephysicsanalysistheeventstarttimedeterminationisthemostimptantfirststepineventreconstructionstage.Thisthesisgive

4、sageneralintroductionofparticlephysicsparticleacceleratsdevelopmentfollowedbythestructureofBEPCBESitsphysicalgoalintroductionbriefly.TheBESsoftwaredevelopmentenvironmentthetwomethodsofeventstarttimedeterminationarestudie

5、dcarefully.ThefirstoneisusinginfmationoftheTimeOfFlightcounter(TOF)theinfmationofthetracksprovidedbythefasttrackingcodeinmaindriftchamber(MDC).ThesecondoneisusingtheinfmationofMDCtimeinfmationofthefasttracking.Thediffere

6、ncesbetweencollidingeventscosmicrayeventsaretestedcarefullytodesignthealgithm.TheClanguagetheOOP(ObjectientedProgramming)areusedtodevelopthealgithmthecodesperfmanceistunedcheckedbydifferentMonteCarol(MC)datasamples(singl

7、eelectronhadronevents).Theresultsshowthatthealgithmisreasonablereliablemeanwhilethedeficienciesofthealgithmsarepresentedalso.Afterstudiedtheacteristicsofsomeeventswhosestarttimecan’tbecalculatedbythistwomethodsaccdingtot

8、herelationshipbetweenMDCgeometricstructureeventinfmationanewalgithmofeventstarttimedeterminationisdevelopedwithClanguageOOP.ThisnewalgithmistestedcheckedcarefullybytheMCdatasamplesthefinalresultsindicatethatthenewalgithm