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  • 简介:TheGroupofNuclearStructureResearchatIMPhasdevotedmuchefforttothestudyofin-beam-rayspectroscopyandγ-decayspectroscopy.Oneterminalforin-beam-rayspectroscopyhasbeennewlybuiltupin2016.Asforγ-decayspectroscopy,twopointsneedtobeemphasized.Inordertostudythein-beam-rayspectroscopy,aballwasplacedattheterminalofnewTL2beamline.Threequadrupolemagnetsfollowingthedipolemagnetarethemainbuildingblocksalongthebeamline.Theballconsistsof8cloverand16HPGedetectorswithaCsIballinsidetoselectthechargedparticlechannel.Awallisolatingtheballfromthequadrupoleswasusedtoshieldtheradiationproducedbytheacceleratoranddepositingenergyinthedetectors,whichmayresultinahighbackground.Theinstallationwasfinishedin2016andtheexperimentforin-beam-rayspectroscopyisexpectedtoperformin2017.

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  • 简介:TheGroupofNuclearStructureResearchatIMPhasdevotedmuchefforttothelifetimemeasurementsoflowlyingexcitedstatesvia??fasttimingcoincidence.Twoexperimentswereperformedin2015attheradioactivebeamlineRIBLL[1]andgas-filledrecoilseparatorSHANS[2].

  • 标签: STRUCTURE RESEARCH GROUP
  • 简介:IthasbeentwoyearsandeightmonthssincethefirstissueofPhotonicsResearchwaspublishedinJune2013.Duringthattime,thephotonicsandopticscommunityhasprogressedonmanyfronts,ashasthejournal.Advanceshavebeenreportedinlasers,microringresonators,nanowaveguideproperties,nano-optics,ultrafastoptics,metamaterials,andnonlinearoptics,tonamebutafewthatcontinuetopushforwardtheboundariesofphotonicsandopticsresearch.In2014,

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  • 简介:Lastyears,severalexperimentsabouthalonucleiwereperformedatRIBLL.OntheanalyzingandfittingthedatabyusingGlaubertheorywithsomeassumptions,followingsomeresultswerededuced.1.~8Bshowsaprotonhalostructure.ThereactioncrosssectionσRof54MeV/u~8BonSiwasmeasuredas1634±49mb.Thedensitydistributionof~8BwasstudiedthroughafittingprocedureontheenhancementoftheσRatlowenergiesincludingthehighenergydatabyusingGlaubertheory.Theresultshowsalongtail...

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  • 简介:Collaborativeenvironmentssupportingpointtopointandmultipointvideoconferencing,documentandapplicationsharingacrossbothlocalandwideareanetworks,videoondemand(Broadcastandplayback)andinteractivetextfacilitieswillbeacrucialelementforthedevelopmentofthenextgenerationofHEPexperimentsbygeographicallydispersedcollaborations.The"VirtualRoomVideoconferencingSystem"(VRVS)hasbeendevelopedsince1995,inordertoprovidealowcost,bandwidth-efficient,extensiblemeansforvideoconferencingandremotecollaborationovernetworkswithinthehighEnergyandNuclearPhysicscommunities.TheVRVS(VirtualRoomsVideoconferencingSystem)providesworldwidevideoconferencingserviceandcollaborativeenvironmenttotheresearchandeducationcommunities,VRVSusestheInternet2andESnethigh-performancenetworksinfrastructuretodeployitsWeb-basedsystem,whichnowincludesmorethan5790registeredhostsrunningVRVSsoftwareinmorethan50differentcountries,VRVShostsanaverageof100-multipointvideconferenceandcollaborativesessionsworldwideeverymonth.Therearearound35reflectorsthatmanagethetrafficflow.atHENPlabsanduniversitiesintheUSandEurope,Sofar,thereare7VirtualRoomsforWorldWideConferences(involvingmorethanonecontient),and4VirtualRoomseachforintra-continentalconferencesintheUS,EuropeandAsia,VRVScontinuestoexpandandimplementnewdigitalvideotechnologies,includingH.323ITUstandardintegration,MPEG-2videoconferencingintegration,sharedenvironments,andQualityofService.

  • 标签: 电视会议 网络电视 电视电话
  • 简介:Nanoparticulate流动发生在大量自然现象和工程应用程序并且因此,吸引了许多注意。现在的论文的目的是提供在最后十年进行的研究的评论。盖住的研究在管子和隧道中由于凝结联系粒子,时刻的Taylor系列扩大方法,和nanoparticle分布到monodisperse和polydisperse的Brownian凝结流动,喷气流动,和混合的层并且在火焰合成和免职的过程。

  • 标签: 纳米颗粒 凝固 流动 综述 泰勒级数展开 自然现象
  • 简介:Afterlessthanayearofoperation,theBaBarexperimentatSLAChascollectedalmost100millionparticlecollisioneventsinadatabaseapproaching165TB.Around20TBofdatahasbeenexportedviatheInternettotheBaBarregionalcenteratIN2P3inLyon,France,andaround40TBofsimulateddatahasbeenimportedfromtheLawrenceLivermoreNationalLaboratory(LLNL),BaBarCollaboratorsplantodoubledatacollectioneachyearandexportathirdofthedatatoIN2P3.SowithinafewyearstheSLACOC3(155Mbps)connectionwillbefullyutilizedbyfiletransfertoFrancealone.Upgradestoinfrastructureisessentialanddetailedunderstandingofperformanceissuesandtherequirementsforreliablehighthroughputtransfersiscritical.Inthistalkresultsfromactiveandpassivemonitoringanddirectmeasurementsofthroughputwillbereviewed.Methodsforachievingtheambitiousrequirementswillbediscussed.

  • 标签: 粒子物理学 BaBar实验 高数据流网络
  • 简介:LIGAtechniquehasbeendevelopedsince1993atBSRF,includingthefabricationofLIGAmask,deepX-rayLithography,electroplating,thepouringmoldingandtheapplicationsinsomefields.TheLIGAmaskwithgoldabsorbingstructuresof20μmthicknessand5μmwidthandKaptonmembraneofaround5μmthicnesshasbeensuccessfullfabricatedandappliedtothedeepX-raylithographywiththePMMAstructureof1mmthicknessorobove.thebeamlineformawigglerisusedforthedeepX-raylithographyofLIGAstatiionandisopentootheinstitutesresearchingthedeepX-raylithography.ThenormalprocessofLIGAtechniquewiththeexceptionofmoldinghasbeenestablishedwiththePMMAstructuresof500μmthicknessatBSRF.ThelargestaspectratioofPMMAstructruescanreachabout50withtheheightof500μmandthelateralsiaeof10μm.Thenickelandcopperstructureswiththetheicknessof0.5mmand1mmhavebeenmadebyusingtheelectroplatingtechnique.TheSU8asaresistmaterialofdeepetchlithographywithUVlightisalsodevelopedinthefabricationofLIGAmaskandsomedevicesatBSRF.Electromagneticsteppingmicromotor,haetexchange,accelerator,structuresusedintheEDM(electrodischargemachinging)arebeingdevelopedforthefutureapplications.

  • 标签: BSRF 北京同步辐射装置 X射线 LIGA 微加工 超微步进电机