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Title
Japanese: 
English:OES diagnostics of atmospheric pressure argon plasma: Electron temperature and density assessment through visible bremsstrahlung inversion method and collisional-radiative model 
Author
Japanese: 林珂任, タイス ヴァンデルハーク, 菊地航行, 赤塚洋, 後藤基志.  
English: Keren Lin, Thijs van der Gaag, Wataru Kikuchi, Hiroshi Akatsuka, Motoshi Goto.  
Language English 
Journal/Book name
Japanese: 
English:Applied Physics Letters 
Volume, Number, Page Vol. 124    Issue 23    234103
Published date June 5, 2024 
Publisher
Japanese: 
English:AIP Publishing 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL https://pubs.aip.org/aip/apl/article/124/23/234103/3296094/OES-diagnostics-of-atmospheric-pressure-argon
 
DOI https://doi.org/10.1063/5.0198632
Abstract This study determined the electron temperature and density in atmospheric pressure argon plasma using optical emission spectroscopy. The analysis combined continuum and line spectral data. Visible bremsstrahlung inversion was used to derive a partial electron energy probability function (EEPF) from the continuum spectrum. Subsequently, electron temperature was estimated assuming a two-temperature distribution based on the derived EEPF. Electron density was obtained by fitting a collisional-radiative (CR) model to the line spectrum, incorporating the obtained EEPF instead of assuming a Druyvesteynian EEPF. Comparative analysis revealed that the electron densities determined using the approach were approximately one order of magnitude lower than those derived from the CR model with the Druyvesteynian EEPF. However, they exhibited strong agreement with the results obtained by the CR model using a two-temperature distribution. This approach demonstrated favorable performance in reproducing both continuum and line spectra, revealing its high reliability and accuracy for atmospheric pressure argon plasma diagnosis.

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