烟支平均质量控制仪核检测部分电路设计

241Vol.24No.120041NuclearElectronics&DetectionTechnologyJan.20041,2,2(1,2,421001):,,,,,:;;;:TL99:A:025820934(2004)0120067203:2003204228:(19682),,,,0,,MR2925,,,,,,,,,1,B,[1,2]B,B:I1=I0exp(-Lm1),I=I0exp(-Lm)I0,I1B,IB,m1m,Lm=m1$m,,:II0(1-$möm1),$IöI1-$möm1,B$I$m2B[1,3],1176©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2.1nA,,CM1082,,,AD515AD549OPA128AD549AD515I2V,AD549,2,R,,RdCd,Csh,RfCf2,:1)AD5492323,23,100,10M8cm,AD54910138,AD549,23,,;,10158cm,2)Rf,;Cf,,10158cm,(101210188cm),(101210188cm)(101410188cm),,32ms3),,,4)23,8,,,,2.2,,1LA,,,SGS2ThomsonSG352507031%5.1V,,500kHz,f=1ö(0.7Rf+3R0)Cf,R057,,45%86©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.47.5%,;8;,,115,3,,,R45501800V,25mV3,,,2.3,,:,,;Csh[4],;,,,,2OP27R4,,,,3,10-12A,,,,:[1],.[J].(),2001,15(4):50.[2]S(,).[M].:,1995.[3],.[J].,1995,15(2):83.[4],.[M].:,1997.(53,Continuedonpage53)96©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.6,66,,[3],,7,,,,,:[1]InternationalAtomicEnergyAgencySelectedTop2icsinNuclear.IAEATrainingCourseonNUCLE2ARPORWER[2].[M].:.[3].ADC[J].2001,21(6):423.CollectandprocessthesignalsofisotopemeasurementGAOGe1,WUBing2zhe2(1Xi’anJiaotongUniversity,Xi’anofShaanxiProv.710049,China;2Xi’anNuclearInstrumentFactory,Xi’anofShaanxiProv.710061,China)AbstractThearticleintroducesthetechnologyaboutdetectinganddealonwithrandomsignalsiniso2topemeasurementforgettingenergylevelregionatlas.Itdescribesthecircuitdesignforinspectingsu2perposedsignalsandmethodofmultichannelanalyse.Keywords:isotopemeasurement,multichanneltechnology,dealwithsignals,circuitdesign.(69,Continuedfrompage69)ThenucleardetectorcircuitdesignofcigarettemeanweightCHENWen2guang,RAOYi2hua,LIWen2guang(SchoolofElectricalEng,DeptofMathematicsandPhysics,NanhuaUniversity,HengyangofHunanProv.421001,China)AbstractInthispaperthenucleardetectordefectofpresentcigarettemeanweightcontrollerisana2lyzed.Themainreasonandhowtosolveitaregot.Theconcretecircuitisgiven.Afterlongtimeoper2ationithasbeenprovedthatthecircuittechnologyisreliableandperformanceisgood.Keywords:ionizationchamber;microcurrent;meanweightcontroller;highvoltagepowersupply35©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.