简介：Supposetherearetwoelectricitytesters,AandB(FigureA).AndametalcylinderCwhichisalmostclosed(calledFaradayCylinder)isfixedtotesterB,makingbothtesterBandcylinderCcharged.Asaresult,thealuminiumfoilontesterBopens.

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简介：BasedonthemethodofseparatingvariablesandthetechniqueofMuller’scalculatingroots,thepropagationcharacteristicsofhybridmodesinhomogeneousandinhomogeneouscircularFaradaychirowaveguidesareexaminedindetail.Numericalresultsarepresentedtodemonstratethecombinedeffectsofdifferentconstitutiveparametersonthemodebifurcation,symmetryandnonreciprocity,backward-waveandattenuationofhybridmodes,whicharedifferentfromthecasesofordinarygyrotropicandreciprocalchiralwaveguides.

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简介：Anewmethodtoreducethereflection-inducedphasebetweenthetwoortho-gonalcomponentsofthelinearlypolarizedlightafterthereflectionsispresented.Thiskindofsensorhaadessiertofabricateandadjustthanthatwhoseinternalreflectionisatcriticalangle.

简介：Quantumkeydistribution(QKD)isamajorresearchtopicbecauseitprovidesunconditionalsecurity.Unfortunately,manyimperfectionsremaininQKD’sexperimentalrealization.TheFaraday–Michelson(FM)QKDsystemisproposedtoeliminatetheseimperfectionsusingpolarization.However,thelongarm’sphasemodulator(PM)hasanunexpectedinsertionloss,meaningthatthestatesentisnolongerperfect.Inthisletter,weproposeanalternativeFM-QKDsystemstructure,andanalyzethesecurityandkeygenerationrateincomparisonwiththeoriginalsystemviadifferentanalysismethods.WefindanobviouskeyrateimprovementwhenthePMinsertionlossisnotextremelysmall.

简介：ThisstudypresentstheLangmuirandFaradayprobemeasurementsconductedtodeterminetheplumecharacteristicsoftheBUSTLabmicrowaveelectrothermalthruster(MET).Thethruster,designedtooperateat2.45GHzfrequency,isrunwithhelium,argonandnitrogengasesasthepropellant.Forthemeasurements,thepropellantvolumeflowrateandthedeliveredmicrowavepowerlevelsarevaried.Experimentswithnitrogengasrevealedcertainoperationregimeswhereaveryluminousplumeisobserved.Withtheuseofin-house-builtLangmuirprobesandaFaradayprobewithguardring,thrusterplumeelectrontemperature,plasmadensityandioncurrentdensityvaluesaremeasured,andtheresultsarepresented.ThemeasurementsshowthatMETthrusterplumeeffectsonspacecraftwilllikelybesimilartothoseofthearcjetplume.Itisobservedthatthemeasuredplumeionfluxlevelsareverylowforthehighvolumeflowratesusedfortheoperationofthisthruster.

简介：A459nmFaradayanomalousdispersionopticalfilter（FADOF）workingatthesidewingsofthecesium6S1∕2→7P1∕2transitionwithweakoscillatorstrengthisachieved.Thetransmittanceofthehighersidewingreaches98%atatemperatureof179°Candmagneticfieldabove323G.Theexperimentalresultscoincidewiththetheoreticalpredictionsin1982and1995,whichwerenotrealizedinexperimentsforoverthreedecades.Duetoitshightransmittance,highaccuracy,andnarrowlinewidth,the459nmFADOFcanbeappliedinunderwateropticalcommunications,thebuildingofactiveopticalclocks,andlaserfrequencystabilizationinactiveopticalclocks.

简介：在对近地空间目标进行预警跟踪时，雷达发射的电磁波会在电离层中传播，电离层作为磁化等离子体，会导致电磁波产生Faraday旋转，从而对雷达探测性能造成影响。通过数值计算的方式，仿真了Faraday旋转效应导致的雷达极化失配损耗，并对仿真结果进行了分析。通过仿真结果可以看出：太阳活动高年，Faraday旋转角比太阳活动低年大；雷达工作频率越高，受Faraday旋转影响越小；目标仰角较低时，线极化失配损耗较小；椭圆极化方式下，极化失配损耗随椭圆轴比增大而增大；用圆极化方式可以最大程度地减小由Faraday旋转导致的雷达探测性能降低。

简介：TheprecisionofplasmaelectrondensityandFaradayrotationanglemeasurementisakeyindicatorforfar-infraredlaserinterferometer/polarimeterplasmadiagnosis.Toimprovetheprecision,anewmulti-channelhighsignal-to-noiseratioHCOOHinterferometer/polarimeterhasbeendevelopedontheHL-2Atokamak.Ithasahigherlevelrequirementforphasedemodulationprecision.Thispaperintroducesanimprovedreal-timefastFouriertransformalgorithmbasedonthefieldprogrammablegatearray,whichsignificantlyimprovestheprecision.Wealsoapplyareal-timeerrormonitoringmodule(REMM)andastableerrorinhibitingmodule(SEIM)forprecisioncontroltodealwiththeweaksignal.Wetesttheinterferometer/polarimetersystemwiththisimprovedprecisioncontrolmethodinplasmadischargeexperimentsandsimulationexperiments.Theexperimentalresultsconfirmthattheplasmaelectrondensityprecisionisbetterthan1/3600fringeandtheFaradayrotationanglemeasurementprecisionisbetterthan1/900fringe,whilethetemporalresolutionis80ns.ThisperformancecanfullymeettherequirementsofHL-2A.

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