Use of particle-in-cell simulations to improve the actinometry technique for determination of absolute atomic oxygen density

摘要: Actinometry is a non-invasive optical technique that can be used to quantitatively monitor atomic oxygen number densities [O] in gas discharges under certain operating conditions. However, careless application of the lead erroneous conclusions regarding behaviour plasma. One limitation on this an accurate knowledge various rate constants required, which turn hampered by insufficiently precise electron energy distribution function (EEDF) In work, particle-in-cell (PIC) simulations are generate theoretical EEDFs. To validate simulation density ne produced PIC code compared with experimental values measured using hairpin probe. The input parameters adjusted optimize agreement between and results. This approach should principle yield EEDF more accurately reflects true then for actinometry model improve accuracy quantitative result particular set plasma results obtained two-photon absorption laser-induced fluorescence (TALIF) approach.