Suprathermal electrons in kJ-laser produced plasmas: M- shell resolved high-resolution x-ray spectroscopic study of transient matter evolution

摘要

Hotelectronsareofkeyimportancetounderstandmanyphysicalprocessesinplasmaphysics.Theyimpactstronglyonatomicphysicsasalmostallradiativepropertiesareseriouslymodified.X-rayspectroscopyisofparticularinterestduetoreducedphotoabsorptionindensematter.WereportonastudyofthecopperKαX-rayemissionconductedatthens,kJlaserfacilityPALS,Prague,CzechRepublic.Thincopperfoilshavebeenirradiatedwith1ωpulses.TwosphericallybentquartzBraggcrystalspectrometerswithhighspectralandspatialresolutionhavebeensetupsimultaneouslytoachieveahighlevelofconfidenceinthespectraldistribution.Inparticular,anemissionontheredwingoftheKα2transition(λ=1.5444?)couldbeidentifiedwithcomplexatomicstructurecalculations.Wediscusspossibleimplicationsfortheanalysisofnon-equilibriumphenomenaandpresentfirstatomicphysicssimulations...