铝膜反射镜60﹢keV质子辐照效应

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1、航天器环境工程第27卷第4期434SPACECRAFTENVIRONMENTENGINEERING2010年8月Theeffectsof60keYprotonirradiationonaluminumfilmreflectorWeiQian91，WangDanl，LiuShengxianl，LiuHal2(1．SchoolofMaterialsScienceandEngineering，TianjinUniversity,Tianjin300072，China；2．SpaceMateiralsandEnvironmentE

2、ngineeringLaboratory,HarbinInstituteofTechnology,Harbin150001，China)Abstract：Undertheenvironmentofvacuumandheatsink,theeffectsoftheirradiationofprotons谢thallenergyof60keVontheo砸calspecularreflectanceofAIreflectoraresmdied．Theexperimentalresultsshowthatthespecularr

3、eflectanceoftheAIfilmreflectorissignificantlyaffectedbytheirradiation．Withincreasingfluenea，thespecularreflectancedecreasesmonotonously．Atalowradiationflueneeoflxl0”cnl-2，thespecularreflectanceisdecreasedbutslightly,andthechangefirstlyoccursintheultravioletregion．

4、Withafurtha"increaseoffluence,asignificantdecreaseofthespecularreflectanceoc℃alrsparticularlyinthewavelengthrangeof250--800um．ThereAlsonfbrnlcdecreasecouldbeattributedtotheappearanceofripplesandhillocksonthesurfaceoftheAImirroratk-rtheprotonirradiation．Keywords：pr

5、otonirradiation；aluminumfilmreflector；specularreflectance；tipple；hillockcLCnumber：V416．5Documentcode：AArticleID：1673—1379(2010)04-0434-03DOI：10．39690．issn．1673—1379．2010．04．006OIntroductionAluminumfilmshavebeenusedinhighqualityopticsofspacecraftforalongtimeduetoit

6、sbroadbandfrontreflectingsurfaces．HoweveLafterprotonirradiation，itsspecularreflectancewoulddecreaseandripplesandhillockswouldappearonthesurface，thusasuperhighquailtyreflectormaybetumedintoalowperformancereflector[1-21．Opticalthinfilms，suchasopticalreflectors，arekn

7、owntobesubjecttothedamageofchargedparticlesinthespaceradiationbelt，especially,thelowenergyprotonsLsJInthepastyears，thestudiesconcerningradiationeffectsofspacechargedparticlesonopticalmaterialswerefocusedontheparticleswithenergiesover1MeV，withlittleattentiononlowen

8、ergeticradiationdamages．ButthefluxofparticlesincreaseswiththedecreaseoftheirenergyintheVanAllenradiationbeltconsistingprincipallyofchargedprotonsandelec