简介:Hightimeresolutionmeasurementsoftheelectrostaticfluctuations,radialelectricfieldErandturbulence-inducedelectronfluxΓehavebeenperformedacrossthetransitionoflowerhybridcurrentdriveimprovedconfinementwithagraphiteLangmuirprobearrayatthelastclosedfluxsurfaceoftheHT-7tokamak.ThedecreaseofΓeisdominatedbythesuppressionoffluctuationlevels,whichfollowsthechangeofEr.AreversalofthepoloidalpropagationdirectionofturbulencedemonstratesthatthepoloidalpropagationisdominatedbyEr×Bφdrift.Theenhancementofpoloidalcoherenceaccompaniesthefluctuationsuppression,whichsuggeststhesubtlevariationofturbulencefeatures.
简介:Asimplemethodisappliedtocalculatingtheisotopeshifts(ISs)on5S1/2→4D3/2,5/2transitionsof87,88Sr+.FirstwehavecalculatedtheISsoflowertransitionsonaseriesofalkali-likesystemssuchasB2+,Ca+andBa+,whichareinagreementwithotherworks.ThentheISson5S1/2→4D3/2,5/2transitionsof87,88Sr+,whichareusefultostudytheSr+opticalfrequencystandard,areevaluated.
简介:TernarymetalchalcogenidesemiconductorAg8SnS6,whichisanefficientphotocatalystundervisiblelightradiation,isstudiedbyplane-wavepseudopotentialdensityfunctionaltheory.Aftergeometryoptimization,theelectronicandopticalpropertiesarestudied.Ascissoroperatorvalueof0.81eVisintroducedtoovercometheunderestimationofthecalculationbandgaps.Thecontributionofdifferentbandsisanalyzedbyvirtueoftotalandpartialdensityofstates.Furthermore,inordertounderstandtheopticalpropertiesofAg8SnS6,thedielectricfunction,absorptioncoefficient,andrefractiveindexarealsoperformedintheenergyrangefrom0to11eV.TheabsorptionspectrumindicatesthatAg8SnS6hasagoodabsorbencyinvisiblelightarea.Surfaceenergiesandworkfunctionsof(411),(413),(211),and(112)orientationshavebeencalculated.TheseresultsrevealthereasonforanoutstandingphotocatalyticactivityofAg8SnS6.
简介:Nuclearmassisoneofthefundamentalquantityofatomicnucleus.Thetotalbindingenergyofanucleusderivedfromtherelatedmassvaluesreflectsalltheinteractionsamongtheconstitutingnucleons.Massesofshort-livedA=2Z+3nucleiof112SnprojectilefragmentshavebeenmeasuredattheexperimentalcoolerstorageringCSRe,employingtheIsochronousmassspectrometry(IMS).TheexperimentwasconductedattheHeavyIonResearchFacilityinLanzhouatthebeginningof2016.Theprimarybeamof112Sn35+wasaccumulatedinthesynchrotronCSRmandacceleratedto467.91MeV/u.Secondarybeamwereproducedbyimpingingthehighintensity112Sn35+beamontoa10mmberylliumtargetwhichwaslocatedattheentranceoftheradioactivebeamlineRIBLL2.Theprojectilefragmentsof112Snemergedfromthetargetwerethentransmitted,separatedinflightthroughRIBLL2andfinallyinjectedintoCSRe.
简介:IGUANA(InteractiveGraphicsforUserANAlysis)isaC++toolkitfordevelopinggraphicaluserinterfacesandhighperformance2-Dand3-Dgraphicsapplications,suchasdatabrowsersanddetectorandeventvisualisationprograms.TheIGUANAstrategyistousefreelyavailablesoftware(e.g.Qt,SoQt,OpenInventor,OpenGL,HEPVis)andpackageandextendittoprovideageneral-purposeandexperiment-independenttoolkit.WedescribetheevaluationandchoicesofpubliclyavailableGUI/graphicssoftwareandtheadditionalfunctionalitycurrentlyprovidedbyIGUANA.WedemonstratetheuseofIGUANAwithseveralapplicationsbuiltforCMSandD0.
简介:Aswellknown,iftheHiggsbosonwerenotobservedatLHC,thetechnicolormodelwouldbethemostfavorablecandidateresponsibleforthesymmetrybreaking.Toovercomesomedefectsinthepreviousmodel,someextendedversionshavebeenproposed.IntheTC2modeltypicalsignatureisexistenceofheavyH_(TC)andtechnipionП.Adirectproofofvalidityofthemodelistoproducethemataccelerator.Thuswestudytheproductionratesofe~+e~-→H_(TC)П~0ande~+e~-→П~+П~-atILCinthetopcolor-assistedtechnicolor(TC2)model.Infact,thereisafloodofmodelsbelongingtonewphysics,whichcanresultinproductswithcharacteristicssimilartoH_(TC)+ПoftheTC2model.ThereforetodistinguishthismodelfromothersonemayneedtoinvestigatesomedetailsbycalculatingthecrosssectiontoNLO.WeindeedfindthattheNLOcorrectionsaresignificant,namelytheratioδ2≡(σ_(NLO)-σ_(LO))/σ_(LO)ine~+e~-→H_(TC)П~0exceeds100%withinaplausibleparameterspace.
简介:ThespectrumoftheΣ(1193)excitedstates,Σ,withisospinI=1andstrangenessS=??1isoneofthemostimportantissuesinhadronicphysics.TheΣresonancesaremostlyproducedandstudiedinK-inducedreactions.ManyΣresonancesarenowcatalogedbytheParticleDataGroup[1].However,ourknowledgeoftheseresonancesisstillverypoor.Intheenergyregionbelow2GeV,onlyafewofthemarewellestablished,suchastheΣ(1385)ofspin-parityJP=3=2+,Σ(1670)ofJp=3=2??andΣ(1775)ofJp=5=2??.Theothersarenotwellestablishedandsomeofthemareevenoflargeuncertaintiesontheirexistence.Thus,thestudyoftheΣresonancewiththeavailableexperimentaldataisnecessary.