简介:BeamModulatorofPhotoelectricPulse¥GuZhongdao;WangWeiandDongChengfuTheexplorationofnuclidefarfromtileβstabilityline(exotic...
简介:Thetructure,equivalentcircuit,noisesoucesofsiliconphotodiodeareanalyzed.Inordertoimprovethemeasuringlinearity,wemustchoosethesiliconphotodiodewithalargeRd,smallRsandI0andunderanoperationstateofoutputshort-circuit.Wemustlettheoperationamplifierworkinthecurrent-voltagetransferform.Alsoweanalyzedtheeffectsoftheinputnoisevoltage,theinputnoisecurrent,theinputoffsetvoltage,theinputoffsetcurrentoftheoperationamplifierandthenoisesofthesiliconphotodiodeonthecombinedcircuitoftheoperationamplifierwiththesiliconphotodiode.Consideringthesefactors,wecandesignthedetectivecircuitwithhighresponse,sensitivity,stability,linearityandSNR.
简介:Photoelectricpropertyofpolyanilinedopedwithdodecyl-benzeneincreasesobviously,whenpolyanilinedopedwithDBSAisirradiatedwithlight,Mixtureofsensitivematerialisadvantageoustotheabsorptionofpolyanilineinvisiblelightspectrum,andtheconductivityisalsoimproved.TheresultsofdielectricmeasurementsonpolyanilinedopedwithDBSAinanAl-PAn-DBSA-Alconfigurationasfunctionoffrequencyandtemperaturearereported.Thespace-chargepolarizationphenomenonisobserved.Carrierlifetimeismicrosecondmagnitudeandmobilityis(0.001-0.1)cm^2/V·s,whichareobtainedbycalculationorexperiment.Theactiveenergyisobtainedfromtherelationbetweenconductivityandtemperature.TheconductingmechanismofPAn-DBSAisanalyzed.
简介:Inordertoovercometheinconvenienceofmanualbubblecounting,abubblecounterbasedonphotoelectrictechniqueaimingforautomaticallydetectingandmeasuringminutegasleakageofcryogenicvalvesisproposed.Experimentshavebeenconductedonaself-builtapparatus,testingtheperformancewithdifferentgasinletstrategies(bottomgas-inletstrategyandsidegas-inletstrategy)andtheinfluenceofgaspipelength(0,1,2,4,6,8,10m)andleakagerate(around10,20,30,40bubbles/min)onfirstbubbletimeandbubblerate.Abufferof110cm3isinsertedbetweenleakagesourceandgaspipetosimulatethedown-streamcavumadjacenttothevalveclack.Basedonanalyzingtheexperimentaldata,experientialparametershavealsobeensummarizedtoguideleakagedetectionandmeasurementforengineeringapplications.Apracticalsystemhasalreadybeensuc-cessfullyappliedinacryogenictestingapparatusforcryogenicvalves.
简介:Basedontheideaoftiltingaphotoelectricconversiondevice,themonocrystallinesiliconp-njunctiondevicewastiltedtomakelightincidentuponthedeviceatanangleof45°withthenormalofthedevicesurface,resultingininfraredmultiple-internal-reflectioninsidethedevice.Theinternalreflectionleadstopathlengthincreaseofinfraredlight,makingtheenhancementofinfraredabsorptionofthedevice.Anincreaseof11%inenergyconversionefficiencyhasbeenobtainedthroughtiltingthedevice.
简介:一个新奇的单个戒指的绝对的光柄编码器被在这篇论文学习传统的绝对的光柄编码器的编码原则设计。对编码器的取向算法的描述被指定,并且为向取向解释算术的一个例子被给它显示编码器的理论工作。获得电荷耦合器件的信号的视觉接口与VB被显示出,它提供可靠基础处理数据。编码器的测量精确的有效因素被分析。CLC数字TP212.14
简介:Thephotocurrent-voltagecharacteristicsandphotoelectricsensitivityofa-Si:Hsampleswithslitandcombelectrodesaremeasured.Amethodforcalculatingthechargeintensifyinggainfromthephotoelectricsensitivityisproposed.Theobtainedchargeintensifyinggainofa-Si:Hunderanelectricfieldof105V/cmthroughthismethodisashighas4.3×103.Thegenerationprocessofthechargeintensificationeffectina-Si:Hisdiscussedonthebasisoftheenergyleveldiagram.Andtheproductofelectron’smobilityanditslifetimeiscalculatedfromthemeasuredvaluesofthegains.