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1、2006IEEENuclearScienceSymposiumConferenceRecordN42-3BackIlluminatedDriftSiliconPhotomultiplierasNovelDetectorforSinglePhotonCountingChristineMerck,RouvenEckhardt,RobertHartmann,PeterHoll,ChristianKoitsch,RazmikMirzoyan,Hans-GuntherMoser,JelenaNinkovic,RainerH.Richter,
2、GerhardSchaller,FlorianSchopper,HeikeSoltau,¨LotharStruder,MasahiroTeshimaandGeorgeV¨alceanuˆAbstract—Singlephotoncountingplaysanessentialroleforamainlybyincidenthadronsofcosmicorigin[3]andalso,awidevarietyofapplications,rangingfrombiomedicalresearchsmallfractionofair
3、showersisgeneratedbyincidentgamma-toastronomy.Ingamma-rayastronomy,theCherenkovtelescoperaysandelectrons.Asaruleofthumb,thereisalinearMAGICisusedtodetectCherenkovphotonsgeneratedinatmo-relationshipbetweenenergyoftheprimaryincidentparticlesphericairshowers.Sincethefluxo
4、fCherenkovphotonsfromairshowersislow,thedevelopmentofnewsinglephotondetectorsandtheamountofCherenkovphotonsgenerated[4]:withhighquantumefficiencyisnecessary.TheconceptoftheThesmallertheenergyoftheincidentparticle,thesmallerBackIlluminatedDriftSiliconPhotomultiplier(BID
5、SiPM)isatheamountofCherenkovphotonsproducedduringshowernoveldetectordesignforsinglephotoncounting.Itcombinesthedevelopment.TheMAGIC(MajorAdvancedGamma-rayprinciplesofasiliconphotomultiplier(SiPM)andadriftdiode.ImagingCherenkov)telescopeiscurrentlytheworld’slargestTheb
6、ackilluminateddriftsiliconphotomultiplierisoperatedasbackilluminateddetectorthusprovidingafillfactorof100%.ACherenkovtelescopewithamirrordiameterof17m[5].Inhighquantumefficiencyofabout80%inawavelengthregionofordertolowertheenergythresholdoftheMAGICtelescope300–1000nmcan
7、beachieved.Thedriftregionisusedtofocusandgivegoodoverlapofdatareceivedwithsatellitesintheelectronsfromthebackthroughthedepletedbulktothesmallrangeofca.10GeV[6],thedevelopmentofdetectorswithhighpoint-likeavalancheregion.Thetimejitteroftheelectronslimitsquantumefficiency
8、isnecessarytoresolveimagesofshowersthetimeresolutionofthedetectortoabout1nsassimulationresultsshow.Aprototypeofanavalanchere
