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简介：EmployingafiberFabry-Perot(FFP)interferometerhasbeenconsideredasatrianglenotchfiltertodemodulatethewavelengthoffiberBragggrating(FBG)sensor.Thesingleparameterofstrainhasbeendemodulated,andthecross-sensitivityinfluenceoftemperaturehasbeeneliminated.Theprincipleofthismethodissimpleandeasytobeimplemented,andhasbeenusedtodesigna30tfibergratingweightbridgesuccessfully.Themaximaltemperaturedrifterroroftheweightbridgeis4με,whichmeansthatthefullscaleerroris8‰.Theresultrevealsthattheaccuracyishighenoughtobeusedinmeasurement.

简介：Thephotonpolarizationtensorcarriesthefundamentalinformationofmagnetizedvacuumormedium[1{5].Acompletedescriptionofthevacuumpolarizationtensorisparticularlycomplicatedtoapproach,sincethevacuumphotonpolarizationtensorisexpressedintermsofadoublesummationofinfiniteserieswithrespecttotwoLandaulevelsoccupiedbyvirtualchargedparticles.MostworkswerefocusingonthestrongfiledlimitwithanassumptionofLowestLandauLevel(LLL)[2,6]InRef.[7]weobtainedafulldescriptionofvacuumpolarizationtensorinresponsetoalltheLandaulevelsatanyfieldstrengthofBforthefirsttimebeyondLLLapproximation,andwefoundoutthattheimaginarypartofthephotonpolarizationtensorξΠbecomesnonzeroatthetimelikemomentaregionQ2>4(M2+2neB)atT=0,i.e..,theLLLapproximationisanalyticallysatisfied[3,7].

简介：Anomaloustransportisoneofthemostimportantsubjectsforthetokamakresearch.Experimentshaveconfirmedthatanomaloustransportiscausedbyturbulencesdrivenbytemperatureanddensitygradientinplasma.Theexperimentsshowthationdiffusioncanbereducedtoneoclassicallevelinhighparameterplasmawithinternaltransportbarrier.

简介：Recently,theL-modetoH-mode(L-H)transitionintokamakplasmaconfinementwasfoundtoberelatedtothepresenceofthepoloidalflowshearneartheplasmaedge.Animportantmechanismistheionorbitlosscausedbyinteractionwiththelimiter.AcomplementaryexplanationisthegenerationofpoloidalflowsbyplasmafluctuationsviatheReynoldsstressandthepoloidalspin-upofplasmasfrompoloidalasymmetryofparticleandmomentumsources.

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简介：血浆nitrocarburizing和血浆氧化处理被执行改进wear和SKD61钢的腐蚀抵抗。血浆nitrocarburizing在生产epsilon-Fe2_3的氮，氢和甲烷空气在540°C为12h被进行(N，C)血浆nitrocarburising生产的phase.The混合物层主要由电子阶段组成，与gamma'-Fe4的一个小比例(N，C)复合的层和扩散层的phase.The厚度是大约10亩m和大约200/^m，respectively.Plasma柱子氧化为1h.The在500°C的经常的温度与各种各样的氧/氢比率在nitrocarburized样品上被执行在在复合的层上的厚度的1-2亩m的很薄的磁铁矿(Fe3O4)层被获得。阳极极化测试表明那个血浆nitrocarburizing过程贡献了SKD61钢的腐蚀抵抗的重要改进。然而，nitrocarburized混合物层的腐蚀特征被氧化处理败坏。

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简介：BulknanocrystallineSmCo6FesinteredmagnetwaspreparedbySparkPlasmaSinteringtechnique(SPS).XRDpatternsshowthatthemagnetexhibitsastableTbCu7structure.TEMobservationindicatesthatthemicrostructureofthemagnetiscomposedofSmCo6Fesinglephasegrainswithanaveragegrainsizeof30nm.Magneticmeasurementshowsthatunder9Tmagneticfield,thecoercivityofthemagnetreaches1.12T;thesaturationmagnetizationandtheremanenceare1.13and0.67T,respectively.Themagnethasa(BH)maxof75.6kJ·cm-3.

简介：Theelectrostaticsheathwithacylindricalgeometryinanion-electronplasmaisinvestigated.AssumingaBoltzmannresponsetoelectronsandcoldionswithbulkflow,itisshownthattheradiusofthecylindricalgeometrydonotaffectthesheathpotentialsignificantly.Wealsofoundthatthesheathpotentialprofileissteeperinthecylindricalsheathcomparedtotheslabsheath.Thedistinctfeatureofthecylindricalsheathisthattheiondensitydistributionisnotmonotonous.Thesheathregioncanbedividedintothreeregions,twoascendantregionsandonedescendantregion.

简介：AprototypeofPulsedPlasmaArcCladdingsystemwasdeveloped,inwhichsinglepowersourcesuppliesbothtransferredplasmaarc(TPA)andnon-transferredplasmaarc(N-TPA).BothplasmasworkinturninahighfrequencycontrolledbyanIGBTconnectingnozzleandworkpiece.TheworkingfrequencyofIGBTrangesfrom50～7000Hz,inwhichtheplasmascanworkinturnsmoothly.Higherthan500HzofworkingfrequencyissuggestedforpromotionofcladdingqualityandprotectionofIGBT.DragphenomenonofTPAintensifiesasthefrequencygoesup,whichtendstoincreasethecurrentproportionofTPAandsuppressN-TPA.TheoccupationratioofIGBTcanberegulatedfrom5%～95%,whichbalancesthepowersuppliesofbothplasmas.Anoccupationratiohigherthan50%givesadequateproportionofarccurrentforN-TPAtopreheatpowder.

简介：Thegenerationofplasmawhichcanabsorbmicrowavesiscurrentlyaresearchtopicofinterest.Thiskindofplasmaisoftenproducedbythedischargeorelectron-beamimpactofnoblegases.Inthispaperanalternaticeapproach,combustionplasma,isstudied.Theplasmaisproducedbycombustingsolidgrainspreparedspecially.Sixgroupsofpowdersweremadeandusedtogeneratetheplasma.Thetransmissivityofthewaveinplasmawasmeasuredbyemployingamicrowavescalarnetworkanalysersystem.Inaddition,theelectrondensityandthecollisionfrequencyoftheplasmawereexaminedbymicrowavedouble-frequencydiagnosis.Themeasurementresultsshowedthattheplasmacouldabsorbmicrowavesremarkablywithanaveragetransmissionattenuationbeingmorethan18dBinafrequencyrangeof2GHzto15GHz.Thediagnosisindicatedthattheelectrondensityoftheplasmavariedfrom10~(17)m~(-3)to10~(19)m~(-3)andthecollisionfrequencywasabout5×10~(10)s~(-1).

简介：高密度的RF离子来源是一个中立横梁注射者的必要部分。在这研究，作者试图由通过分泌物房间的对称的轴插入一个薄绝缘的试管翻新一个原来的常规RF离子来源反应堆。在这个内胎的帮助下，反应堆能够产生一个光线的磁场而不是原来的横向的磁场，它解决E????

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简介：Plasmasourceperformanceparameters,includingplasmaejectiondensityandvelocity,greatlyaffecttheoperationofashort-conduction-timeplasmaopeningswitch(POS).Inthispaper,theplasmasourceusedinthePOSofQiangguangIgeneratorischosenasthestudyobject.AtfirstthePOSworkingprocessisanalyzed.TheresultshowsthattheopeningperformanceofthePOScanbeimprovedbyincreasingtheplasmaejectionvelocityanddecreasingtheplasmadensity.Theinfluenceofthecableplasmagunstructureandnumberontheplasmaejectionparametersisexperimentallyinvestigatedwithtwochargecollectors.Finallyasemi-empiricalmodelisproposedtodescribetheexperimentalphenomenon.

简介：Opticalemissionspectroscopy(OES)wasappliedforplasmacharacterizationduringtheerosionofasphaltenesubstrates.Anamountof100mgofasphaltenewascarefullyappliedtoanelectrodeandexposedtoair-plasmaglowdischargeatapressureof1.0Torr.Theplasmawasgeneratedinastainlesssteeldischargechamberbyanacgeneratoratafrequencyof60Hz,outputpowerof50Wandagasflowrateof1.8L/min.Theelectrontemperatureandiondensitywereestimatedtobe2.15±0.11eVand(1.24±0.05)×1016m-3,respectively,usingadoubleLangmuirprobe.OESwasemployedtoobservetheemissionfromtheasphalteneexposedtoairplasma.BothmolecularbandemissionfromN2,N+2,OH,CH,NH,O2aswellasCN,andatomiclightemissionfromVandHγwereobservedandusedtomonitortheevolutionofasphalteneerosion.Theasphalteneerosionwasanalyzedwiththeaidofascanningelectronmicroscope(SEM)equippedwithanenergydispersiveX-ray(EDX)detector.TheEDXanalysisshowedthatthetimeevolutionofelementsC,O,SandVweresimilar;andthechemicalcompositionoftheexposedasphaltenesremainedconstant.Particlesizeevolutionwasmeasured,showingamaximumsizeof2307μmafter60min.Thisbehaviorismostlikelyrelatedtoparticleagglomerationasafunctionoftime.