简介：ThelateststepsinthesteadyevolutionoftheCERNComputerCentrehavebeentoreducethemultitudeofclustersandarchitecturesandtoconcentrateoncommodityhardware.AnactiveRISCdecommissioningprogramhasbeenundertakentoencouragemigrationtoLinux,andaprogramofmergingdedicatedexperimentclustersintolargersharedfacilitieshasbeenlaunched.Thispaperdescribestheseprogramsandtheexperiencesrunningtheresultantmulti-hundrednodesharedLinuxclusters.

简介：HL-2Atokamakisafusionresearchdevicewithdouble-nulldivertom.Itprovidesbetterexperimentalconditionstoinvestigateedegplasmafeatures,suchasconfinementperformance,particleandimpuritybehaviour,powerdepositionandmaterialerosion.Particularly,impurityproductionandtransportduetoplasmasurfaceinteractionmaybeeffectivelycontrolledbythedivertor.

简介：Thefundamentalmomentumconservationrequirementq~0fortheRamanprocessisrelaxedinthenanocrystallites(NCs),andphononsawayfromtheBrillouin-zonecenterwillbeinvolvedintheRamanscattering,whichiswell-knownasthephononconfinementeffectinNCs.ThisusuallygivesadownshiftandasymmetricbroadeningoftheRamanpeakinvariousNCs.Recently,theA'_1modeof1LMoS2NCsisfoundtoexhibitablueshiftandasymmetricbroadeningtowardthehigh-frequencyside[Chem.Soc.Rev.44(2015)2757andPhys.Rev.B91(2015)195411].Inthiswork,wecarefullycheckthisissuebystudyingRamanspectraof1LMoS2NCspreparedbytheionimplantationtechniqueinawiderangeofion-implanteddosage.ThesameconfinementcoefficientisusedforbothE'andA'_1modesin1LMoS_2NCssincethephononuncertaintyinanNCismainlydeterminedbyitsdomainsize.TheasymmetricalbroadeningneartheA′_1andE′modesisattributedtotheappearanceofdefect-activatedphononsatthezoneedgeandtheintrinsicasymmetricalbroadeningofthetwomodes,wheretheanisotropyofphonondispersioncurvesalongΓ-KandΓ-Misalsoconsidered.Thephotoluminescencespectraconfirmtheformationofsmalldomainsizeof1LMoS_2nanocrystallitesintheion-implanted1LMoS_2.Thisstudyprovidesnotonlyanapproachtoquicklyprobephonondispersiontrendsof2DmaterialsawayfromΓbytheRamanscatteringofthecorrespondingNCs,butalsoareferencetocompletelyunderstandtheconfinementeffectofdifferentmodesinvariousnanomaterials.