SMuK 2023 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 15: Laser Plasmas II/Low Pressure Plasmas and their Applications II

P 15.5: Vortrag

Donnerstag, 23. März 2023, 15:15–15:30, CHE/0089

First-principles simulation of optical emission spectra for low-pressure argon plasmas and its experimental validation — Fatima Jenina Arellano¹, Márton Gyulai^2,3, Zoltán Donkó^1,3, Peter Hartmann³, •Tsanko Vaskov Tsankov⁴, Uwe Czarnetzki⁴, and Satoshi Hamaguchi¹ — ¹Center for Atomic and Molecular Technologies, Osaka University, Osaka, Japan — ²Eötvös Loránd University, Budapest, Hungary — ³Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Budapest, Hungary — ⁴Ruhr University Bochum, Faculty of Physics and Astronomy, Experimental Physics V, Germany

The emission intensity of various spectral lines are often used for the experimental characterization of low-temperature plasmas. However, the interpretation of the spectra requires knowledge of the electron distribution function and the population-depopulation kinetics of the emitting states. To investigate these relations and to test the suitability of numerical models for relating the measured emission spectra to the underlying plasma parameters, we perform here first-principle simulations for low-pressure radio-frequency driven capacitively-coupled argon plasmas via one-dimensional particle-in-cell/Monte Carlo collision (PIC/MCC) code coupled to a global collisional-radiative model. The model provides the emission intensities of various atomic lines which are compared with experimental data. The comparison shows good agreement for pressures up to about 20 Pa and increasingly notable deviations at higher pressures. Possible explanations for the deviations are discussed.