简介：Heathandlinghasbeenasignificantproblemofthehighpowerfiberlasersystemsastheoutputpowerincreasesrapidly.Claddingpowerstripper(CPS)whichisusedtodealwiththeunwantedopticalpowerandlightisrequiredforhighercoolingability.Sothemethodsofstrippingtheunwantedlightattractedmuchattentionrecently,andthethermaleffectisgiven.However,fewinvestigationsfocusonthedissipationoftheheatconvertedfromtheunwantedlight.Inthispaper,anapproachofactivecoolingforCPSisdemonstrated.ThisisachievedbyusingmicrochannelcoolingtechnologyinheatsinkinginCPStoimprovetheefficiencyofheatexchange.InordertoexplainthemechanismofCPSthefunctionofitandconsistenceofcategoriesoftheunwantedlightaredetailedfirstly.Thenmicrochannelheatsinkingisproposedandverifiedbytheheatexchangetheory.Atlast,thedesignoftheCPSwithmicrochannelheatsinkingisshownandfollowingexperimentisconducted.Thefinaltemperatureofthedevicewith1000WcladdingpowerwasdemonstratedatlasttoverifytheabilityofheatdistributionoftheCPScomponent.ThissuggeststhattheseCPSscanbeusedtostripeathousandofwattsoflightinhighpowerdoublecladdingfiberlasers.

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简介：WehavecomprehensivelyinvestigatedthefrustratedJ1-J2-J3Heisenbergmodelonasimplecubiclattice.Thismodelallowsthreeregimesofmagneticorder,viz.,(π;π;π),(0;π;π)and(0;0;π),denotedasAF1,AF2,andAF3,respectively.Theeffectsoftheinterplayofneighboringcouplingsonthemodelarestudiedintheentiretemperaturerange.Thezerotemperaturemagneticpropertiesofthismodelarediscussedutilizingthelinearspinwave(LSW)theory,nonlinearspinwave(NLSW)theory,andGreen’sfunction(GF)method.ThezerotemperaturephasediagramsevaluatedbytheLSWandNLSWmethodsareillustrated,andareobservedtoexhibitdifferentparameterboundaries.Incertainregionsandalongtheparameterboundaries,thepossiblephasetransformationsdrivenbytheparametersarediscussed.TheresultsobtainedusingtheLSW,NLSW,andGFmethodsarecomparedwiththoseobtainedusingtheseriesexpansion(SE)method,andareobservedtobeingoodagreementwhenthevalueofJ2isnotclosetotheparameterboundaries.ThegroundstateenergiesobtainedusingtheLSWandNLSWmethodsareclosetothatobtainedusingtheSEmethod.Atfinitetemperatures,onlytheGFmethodisemployedtoevaluatethemagneticproperties,andthecalculatedphasediagramisobservedtobeidenticaltotheclassicalphasediagram.Theresultsindicatethatattheparameterboundaries,atemperature-drivenfirst-orderphasetransitionbetweenAF1andAF2mayoccuralongtheboundaryline.AlongtheAF1-AF3andAF2-AF3boundarylines,AF3islessstablethanAF1andAF2.OurcalculatedcriticaltemperatureagreeswiththatobtainedusingMonteCarlosimulationsandpseudofermionfunctionalrenormalizationgroupscheme.

简介：PowersupplysystemisanimportantsubsystemofCSR.Toapplyforrunning,theparametersofpowersupplymustbefitthedesign’sdemands.Wehavetestedallprototypeofpowersupplyasfollows.TheDCstabilitymeasurementisthatthepowersupplyrunsincertaincurrentlevelfromthelowervaluetothenormalvalue.Ineverycurrentlevel,weacquireabout550databydigitalmeter(model7081)in8h.

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简介：In2001,CSRpowersupplysystemmadeagreatprogress.ThreeprototypesweredesignedforCSRquadrupleandcorrectmagnet.Threedifferentcompaniesprovidedthethreeprototypes,butthesamecircuit-chopperwereemployed.ThesimplifieddiagramisshowedinFig.1.Allpulsedswitchingpowersupplyprototypesweretestedsuccessfullybeforetheendof2001.

简介：Inthispapertheeffectsofthecondenserdesignparameters(suchasturbineinletcondition.turbinepowerandcondenserpressure)onheattransferarea,coolingwaterflow-rate.condensercostandspecificenergygenerationcostarestudiedforsurfacetypecondenser.Theresultsaregiveninthetextandalsoshownasdiagrams.

简介：J/ψ→γγ是朗道-杨定理禁戒的过程，对该过程的研究能够为寻找新物理提供重要的信息。精确测量该过程的分支比，进而限制理论预期值的范围，能够用于检验C宇称守恒及寻找新物理。本研究将利用106Mψ（3686）单举蒙特卡罗样本研究在北京谱仪-Ⅲ上测量该过程能够达到的精度。本研究在90％置设定了该过程观测事例数的上限，并计算得到其分支比的上限为5．6×10^-7，此研究结果为在BESIII上进行相关实验提供了依据。

简介：Amorphouscarbonandgrapheneco-modifiedLiFePO4nanocompositehasbeensynthesizedviaafacilepolyolprocessinconnectionwithafollowingthermaltreatment.Variouscharacterizationtechniques,includingXRD.Mossbauerspectra,Ramanspectra,SEM,TEM,BET,O2-TPO,galvanocharge-discharge,CVandEISwereappliedtoinvestigatethephasecomposition,carboncontent,morphologicalstructureandelectrochemicalperformanceofthesynthesizedsamples.TheeffectofintroducingwayofcarbonsourcesonthepropertiesandperformanceofLiFePO4/C/graphenecompositewaspaidspecialattention.Underoptimizedsyntheticconditions,highlycrystalizedolivine-typeLiFePO4wassuccessfullyobtainedwithelectronconductiveFe2PandFePasthemainimpurityphases.SEMandTEManalysesdemonstratedthegraphenesheetswererandomlydistributedinsidethesampletocreateanopenstructuredLiFePO4withrespecttographene,whiletheglucosederivedcarbonmainlycoatedoverLiFeP04particleswhicheffectivelyconnectedthegraphenesheetsandLiFePO4particlestoresultinamoreefficientchargetransferprocess.Asaresult,favorableelectrochemicalperformancewasachieved.Theperformanceoftheamorphouscarbon-grapheneco-modifiedLiFePO4wasfurtherprogressivelyimproveduponcyclinginthefirst200cyclestoreachareversiblespecificcapacityashighas97mAh·g-1at10Crate.

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简介：Wepresenttheworkflowofthedesign,realizationandtestingofdeformablemirrorssuitableforhighpowerdiodepumpedsolid-statelasers.Itstartswiththestudyoftheaberrationtobecorrected,andthenitcontinueswiththedesignoftheactuatorspositionandcharacteristic.Inthispaper,wepresentandcomparethreedeformablemirrorsrealizedformulti-Jlevellaserfacilities.Weshowthatwiththesamedesignconceptitispossibletorealizedeformablemirrorsforothertypesoflasers.Asanexample,wereporttherealizationofadeformablemirrorforfemtosecondlasersandforaCWCO2laser.

简介：Laserresistanceandstress-freemirrors,windows,polarizers,andbeamsplittersupto400mm×400mmarerequiredfortheconstructionoftheseriesSGfacilities.Inordertoimprovethecoatingquality,aprogramhasbeeninplaceforthelasttenyears.Forthesmall-aperturepick-offmirror,thelaser-induceddamagethreshold(LIDT)isabove60J/cm2(1064nm,3ns),andthereflectedwavefrontislessthanλ/4(λ=633nm).TheBrewster-anglepolarizingbeamsplitter(Φ50×10mm)showsthebestLIDTresult,upto29.8Jcm2(1064nm,10ns)forap-polarizedwaveinthe2012damagecompetitionoftheXLIVAnnualBoulderDamageSymposium.Forthelarger-aperturemirrorandpolarizer,theLIDTisabove23Jcm2(1064nm,3ns)and14Jcm2(1064nm,3ns),respectively.Thereflectedwavefrontislessthanλ/3(λ=633nm)attheusedangle.

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简介：Asourunderstandingoftheenvironmentalimpactoffossilfuelbasedenergyproductionincreases,itisbecomingclearthattheworldneedsanewenergysolutiontomeetthechallengesofthefuture.Atransformationisrequiredintheenergymarkettomeettheneedforlowcarbon,sustainable,affordablegenerationmatchedwithsecurityofsupply.Intheshortterm,anincreasingcontributionfromrenewablesourcesmayprovideasolutioninsomelocations.Inthelongerterm,lowcarbon,sustainablesolutionsmustbedevelopedtomeetbaseloadenergydemand,iftheworldistoavoidaneverincreasingenergygapandtheattendantpoliticalinstabilities.Laser-driveninertialfusionenergy(IFE)mayoffersuchasolution.

简介：我们建议被用来在single-j壳的Hamiltonian决定联合参数C的一个修改公式。与以前已知的公式比较，新公式改进在入侵者single-j层次和尼尔逊之间的协议。为在粒子转子模型以内的chiral乐队的研究，新联合参数将更加影响在马甲乐队之间切开的精力。

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简介：Wewillreviewsomeoftherequirementsforalaserthatwouldbeusedwithalaserfusionenergypowerplant,includingfrequency,spatialbeamsmoothing,bandwidth,temporalpulseshaping,efficiency,repetitionrate,andreliability.Thelowestriskandoptimumapproachusesakryptonfluoridegaslaser.Adiode-pumpedsolid-statelaserisapossiblecontender.

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简介：Whenexposedtointenseelectromagneticfields,thequantumvacuumisexpectedtoexhibitpropertiesofapolarizablemediumakintoaweaklynonlineardielectricmaterial.Variousschemeshavebeenproposedtomeasuresuchvacuumpolarizationeffectsusingacombinationofhigh-powerlasers.Motivatedbyseveralplannedexperiments,weprovideanoverviewofexperimentalsignaturesthathavebeensuggestedtoconfirmthispredictionofquantumelectrodynamicsofrealphoton–photonscattering.

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