[18a-M_103-1~13] 8.1 Plasma production and diagnostics

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[18a-M_103-1] Analysis of Atmospheric-pressure Non-equilibrium Ar Plasma Based on Continuum and Line spectra with Weighted Analysis in DBD and JET Devices

〇Wataru Kikuchi¹, Jun Enomoto¹, Keren Lin², Tomoya Taguchi¹, Atsushi Nezu¹, Hiroshi Akatsuka¹ (1.Science Tokyo, 2.Seikei Univ.)

Keywords:

Atmospheric-pressure non-equilibrium plasma,bremsstrahlung,collisional-radiative model

This study presents a unified diagnostic framework for atmospheric-pressure non-equilibrium argon plasmas, addressing inconsistencies between parameters derived separately from continuum and line spectra. Using a weighted multi-objective optimization with a two-temperature generalized electron energy distribution function (GEEDF), the method simultaneously fits bremsstrahlung continuum and argon line spectra. The optimal weight parameter w is systematically determined via statistical criteria (MSLE, bias, max error) and Pareto analysis (L-curve) to balance spectral contributions. Applied to a closed-channel dielectric barrier discharge (DBD) and a plasma jet (APPJ), the method yielded a consistent bulk electron temperature of T_e ~=0.6 eV, correcting the overestimation typical of conventional line-ratio methods, and an electron density of n_e =10¹²-10¹³ cm^-3. This approach effectively constrains the EEDF shape, providing robust diagnostics for non-equilibrium plasma kinetics.