冷中子照相裝置成像系統(tǒng)仿真分析.pdf

1、冷中子照相裝置成像系統(tǒng)仿真分析獨創(chuàng)性聲明本人聲明所呈交的學(xué)位論文是本人在導(dǎo)師指導(dǎo)下進行的研究工作及取得的研究成果。據(jù)我所知，除了文中特別加以標(biāo)注和致謝的地方外，論文中不包含其他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含為獲得中國工程物理研究院或其他教育機構(gòu)的學(xué)位或證書使用過的材料。與我一同工作的同志在本研究所做的任何貢獻己在論文中作了明確的說明并表示謝意。學(xué)位論文作者簽名：孑l’島簽字日期：工。f。年5月1日學(xué)位論文版權(quán)使用授權(quán)書本學(xué)位論文

2、作者完全了解并接受中國工程物理研究院研究生部有關(guān)保存、使用學(xué)位論文的規(guī)定，允許論文被查閱、借閱和送交國家有關(guān)部門或機構(gòu)，同時授權(quán)中國工程物理研究院研究生部可以將學(xué)位論文全部或部分內(nèi)容編入有關(guān)數(shù)據(jù)庫進行檢索，可以影印、縮印或掃描等復(fù)制手段保存、匯編學(xué)位論文。學(xué)位論文作者簽名：斟，島簽字日期：知l。年5月7日導(dǎo)師答名：o≮孝乞簽字日期：捌口年，月，7日冷中子照相裝置成像系統(tǒng)仿真分析AbstractNeutronradiography(NR)

3、isanascendantnondestructivetestingtechnologyItisavaluablecomplementaryofXand丫raysradiographyinthenondestructivedetectionofheavymetalsubassemblyandmaterialscontaininghydrogenThecoldneutronradiography(CNR)isanoffshootofNRB

4、ecauseoftheBraggcutoffofthecrosssectionwhilecoldneutronsreacttosomecrystalloidmaterials，theCNRhasagreatdealofexcellencescomparedwithNRtechniquesusingotherenergyneutronsRecentyearstheCNRbecomestobeahotresearchtechniquearo

5、undtheworldanddevelopsrapidlyGenerallytheCNRfacilityiscomposedofthecoldneutronsource，thecollimationsystemandtheimagingsystemDuetothelimitofthecoldneutronsource，therehavenotbeenCNRfacilitiesinlandyetChinaAcademyofEngineer

6、ingPhysics(CAEP)planstofoundaCNRfacilitybasedtheircoldneutronsource，anditisintheperiodofprincipiumdesignUptonowsimulationisthechieflyresearchmethodofCNRtechniqueinlandHoweverthespatialdistributionofneutronbeamspenetrated

7、throughthesamplewasalwaysconsideredastheimageresultofthesimulationintheexistingresearchTheinfluencetotheimagequalityoftheimagingsystemwasignoredThisdissertationmadeastudyofthesimulationmethodoftheimagingsystemwhichmainly

8、consistsoftheconverteLthemillroLthelensandtheCCDcameraInthedissertation：thesimulationmodelofthecoldneutronconverteriSfounded，thepointspreadfunction(PSF)oftheconverteriselicited，theinfluencetotheimagequalityoftheconverter

9、isanalyzed，thecalculationoftheoutputlightintensitydistributionoftheconverterisrealized；thesimulationofthemirrorthelens，andtheCCDcameraiscarriedout，thefinallyimageresultoftheCNRiscompleted；thesimulationmethodoftheimagings

10、ystemwhichissetupinthisdissertationisprovedtobevalidbytheexistedexperimentaldataAccordingtotheresearchresultofthisdissertation，theprincipiumdesignparametersoftheimagingsystemoftheCNRfacilityinCAEPareputforwardTheworkofth

11、isdissertationpromotesthedevelopmentofthesimulationresearchoftheCNRtechnologyItprovidesatechnicalreferencefortheprincipiumdesignoftheCNRfacilityinCAERInthefuture，itwillbecomeanimportanttechniquemeansinthefeasibilityanaly