【英文标准名称】:Nuclearinstrumentation-Multichannelpulseheightanalyzers-Maincharacteristics,technicalrequirementsandtestmethods
【原文标准名称】:核仪器多脉冲幅度分析仪主要特性、技术要求和试验方法
【标准号】:IEC61342-1995
【标准状态】:作废
【国别】:国际
【发布日期】:1995-02
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC45
【标准类型】:()
【标准水平】:()
【中文主题词】:核反应堆;反应堆装置;仪器装置;分析仪;特性;规范(批准);试验
【英文主题词】:Analyzers;Instrumentation;Nuclearreactors;Properties;Reactorinstrumentation;Specification(approval);Testing
【摘要】:ThisInternationalStandardisapplicabletomultichannelpulseheight(amplitude)analyzers(MCA)withlinearamplituderesponse,whicharemeasuringdevicesusedforacquisition,storageandprocessingofamplitudedistributions.Theseanalyzersautomaticallycarryoutthefollowingoperations:-acceptanceofpulsesfromdetectionsub-assembliesorothersources;-analogue-to-digitalconversion(ADC)ofthepulseheightinformation;-sortingofpulseheightdataaccordingtopredeterminedcharacteristics;-storageofdigitalinformation(histogram);-processingofstoredpulseheighthistogramandexternallysuppliedinformationinaccordancewithpredeterminedalgorithms;-datainputandoutputfunctions(forexample,drivingadisplay,aprinter,afloppydiskdrive,aplotter,etc.).Theaboveoperationsmaybeaccomplishedseparatelyorcombinedinanintegratedinstrument.Allthetestsdescribedhereinarenotmandatory,butifthetestiscarriedout,thenitshallbedoneinaccordancewiththeproceduresgivenherein.Inmanycasesinnuclearphysics,itisveryimportanttomeasurethedistributionofcertainkindsofparameters,suchastheenergyofparticles,theirmass,theirdistributionintime,theirscatteringoncertainangles,etc.Inmodernmeasuringpractice,thisperformanceisusuallyaccomplishedbymeansofamultichannelpulseheightanalyzer.Thistypeofadeviceisbuiltinsuchawaythataquantityofacertainphysicalqualityisdigitizedandthenstoredaccordingtoitsdigitizednumber.AllmodernMCAscontainspecialstoringunits(memories)forthispurpose.Afteraccomplishingthemeasurementtherequiredinformationisretrievedfromthememorysothatitcanbeusedforinterpretationofthephysicaldata.Nowadays,multichannelpulseheightanalyzersaremorewidelyusedindifferentfieldsofscienceandindustry.Theirspecificaiminnuclearapplicationsistotransformthepulseheightrelatedtoacertainnuclearevent(usuallyenergy)intoanumbercorrespondingtoamemorycell,sothatduringthemeasurementonecanstoreahistogramthatisverysimilartotheinitialpulseheightdistribution.Thisdistributionreflectstheprobabilitydensityofparticleenergy(energyspectrum).Usingthestoredinformationaboutthedistributionitiseasytodeterminetheinformationabouttheinitialenergyoftheparticles(alphaand/orbeta-particles,gammaandX-quantum,etc.).Further,thisinformationcanbeusedtodeterminefluxdensities,doseratesanddoses,isotopeandelementconcentrationsandcontents,etc.Usually,apulseheightanalyzerincludesanADC(analogue-to-digitalconverter),anacquisitionunit,amemory,adisplayanddifferentinput/output(I/O)units(display,printer,plotter,etc.).Theobjectofthisstandardistopresenttermsanddefinitions,tolistmaincharacteristicsofmultichannelanalyzers,technicalrequirementsandtestmethodsforthefollowingparameters:-minimumandmaximumsignalpulseheightstobemeasured;·mainerroroftheminimumandmaximummeasuredsignalpulseheights;·instabilityoftheminimumandmaximummeasuredsignalpulseheights;·additionalerrors(orvariations)oftheminimumandmaximummeasuredsignalpulseheights;-channelwidth;·totalerrorofthechannelwidth;·instabilityofthechannelwidth;·additionalerrorsofthechannelwidth;-zeropointposition;·offset;·instabilityofthezeropoint;·additionalerrorsofthezeropoint;-operatingrange;-integralnon-linearity;-differentialnon-linearity;-deadtime;-maximuminputpulseratetobemeasured;-livetimeerror;-nonrectangularfactorofchannelprofile;-systemthroughput.
【中国标准分类号】:F81
【国际标准分类号】:27_120_10
【页数】:105P.;A4
【正文语种】:英语