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Themotionofionsatatmosphericpressureisgovernedbyelectricalfield-andviscousdrag-forcestoacomparableextent.
Thusacomprehensivedescriptionoftheconditionsinanatmosphericpressureionsourcehastoincorporatethe-inmanycasesverycomplex-bulkgasflowsinthesourcegeometry.
Numericalmethods,inparticularmoderncomputationalfluiddynamics(CFD)solversystems,arethetoolsofchoicetosimulatethegasflowinAPionsources.Rigorousapplicationofthesemethodscouldresultinanimportantstepforwardonthewayfromtrial-and-errortowardsmodeldrivendesignapproachesfornewAPionsourcegeo-metries.
Fromourlatestresearchefforts(seeposter070insessionTP04fordetails)weproposethatsuchamodeldrivendesignprocessispossibleandfeasible.
Toanalyzethecurrentstateofthetech-nologyandtoproofthatCFDisausefultoolevenforcomplexfluiddynamicalproblems,wesimulatedthegasflowinacommerciallyavailableAPionsource(BrukerMPIS)andvalidatedtheflowsimulationswithappro-priateexperimentalmethods.
Inthiscontributionwepresenttheactualflowsimulation,anexperimentalverification,andadetaileddiscussionoftheresults.
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