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ID:34933081
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页数:6页
时间:2019-03-14
《Optical Readout for Imaging Neutron Scintillation Detectors.pdf》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、OpticalReadoutforImagingNeutronScintillationDetectorsDonaldP.Hutchinson,RogerK.Richards,L.CurtMaxey,R.G.Cooper,andDavidE.HolcombEngineeringScienceandTechnologyDivisionOakRidgeNationalLaboratoryBethelValleyRoad,OakRidge,TN37831AbstractTheSpallationNeutronSource(SNS)underconstructionattheOakRidge
2、NationalLaboratory(ORNL)willbethemostimportantnewneutronscatteringfacilityintheUnitedStates.NeutronscatteringinstrumentsfortheSNSwillrequirelargeareadetectorswithfastresponse(<1microsecond),highefficiencyoverawiderangeofneutronenergies(0.1to10eV),andlowgammaraysensitivity.Wearecurrently6develop
3、ingareaneutrondetectorsbasedonacombinationofaLiF/ZnS(Ag)scintillatorscreencoupledtoawavelength-shiftingfiberopticreadoutarray.A25x25cmprototypedetectoriscurrentlyunderdevelopment.InitialtestsattheIntensePulsedNeutronSourceattheArgonneNationalLaboratoryhavedemonstratedgoodimagingpropertiescouple
4、dwithverylowgammaraysensitivity.Theresponsetimeofthisdetectorisapproximately1microsecond.Detailsofthedesignandtestresultsofthedetectorwillbepresented.PositionSensitiveDetectorAprototype25x25-cmpositionsensitivedetectorhasbeendesignedandconstructed.6Thedetectorusesascintillatorscreenfabricatedfr
5、omamixtureofLiF/ZnS(Ag)powdersheldinanepoxymatrixAphotographofthedetectorandfiberopticsreadoutarrayisshowninFigure1.Theneutronscintillatorscreen,fiberopticsreadoutandphotomultipliertubesaremountedinanaluminumlight-tightenclosure.Neutronsenterthedetectorthrougha0.125-inchthickcoverplate.Anarrayo
6、fwavelength-shiftingfibersisclampedonthescreenoppositethecoverplateina2-dimensionalarraywith48fibersineachdirection.OneendofeveryfiberismappedontoanindividualFigure1ScintillatorScreenandFiberReadoutArraycathodeofaPhilips262AdvancesinNeutronScatteringInstrumentation,IanS.Anderson,BrunoGuérard,Ed
7、itors,ProceedingsofSPIEVol.4785(2002)©2002SPIE·0277-786X/02/$15.00DownloadedfromSPIEDigitalLibraryon17Mar2011to211.68.3.254.TermsofUse:http://spiedl.org/termsXP1704multi-anodephotomultipliertube.Thistubecontains96individualanodesi
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