伽玛光子辐射探测器

：PIN光电二极管，四个低噪声运算放大器和比较器，用于探测单个光子的伽玛射线。的原理，设计考虑和选择组件进行了讨论。Maxim/Dallas>AppNotes>AMPLIFIERANDCOMPARATORCIRCUITSAUTOMOTIVEMEASUREMENTCIRCUITSKeywords:gammaray,photon,radiationdetector,lownoiseopamp,PIN,photodiode,gammaradiation,Jul21,2003operationamplifiers,opamps,comparatorAPPLICATIONNOTE2236Gamma-PhotonRadiationDetectorAPINphotodiode,fourlow-noiseopampsandacomparatorareusedtodetectindividualphotonsofgammaradiation.Theschematic,designconsiderationsandcomponentselectionarediscussed.ThecircuitofFigure1includesaPINphotodiodethatdetectsindividualphotonsofgammaradiation.Whenaphotonstrikesadepletionregioncreatedbyreversebiasonthephotodiode,itproducesasmallamountofchargeinproportiontothephoton'senergy.Theresultingsignalisthen