Practical considerations of the visible bremsstrahlung inversion (VBI) method for arbitrary EEDF determination in cold atmospheric-pressure plasma. (1st July 2022)

• Record Type: Journal Article
• Authors: van der Gaag, Thijs; Nezu, Atsushi; Akatsuka, Hiroshi
• Is Part Of: Japanese journal of applied physics. Volume 61:Number 7(2022)
• Publication Date: 2022-07-01
• Subjects: electron diagnostics -- cold atmospheric-pressure plasma -- electron energy distribution function; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/ac7835
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: The arbitrary electron energy distribution function (EEDF) of cold atmospheric-pressure plasma is determined from optical emission spectroscopy measurement. Using the electron-neutral bremsstrahlung-dominated continuum spectrum and relevant cross-section data, a partial arbitrary EEDF can be reconstructed through the reinforcement learning-based visible bremsstrahlung inversion method. From an atmospheric-pressure argon dielectric barrier discharge plasma emission spectrum (440–900 nm), a partial arbitrary EEDF can be determined with a resolution of 0.2 eV. The resemblance between the obtained arbitrary EEDF and a two-temperature Maxwellian was found with T e = 0.26 and 2.2 eV. The EEDF range is mostly constrained by the spectrum wavelength range.