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<p>Cold plasma sources have evolved fast in recent years as their use in various applications has increased. Extensive studies are being performed, focusing on the medicinal uses of cold atmospheric pressure plasma devices. Measurements of plasma characteristics (such as electron plasma temperature and density) are essential to ensure that the APCPJ is appropriate for the desired application. Thus, this study attempts to determine the electron temperature and density of a cold argon plasma jet caused by an AC high voltage utilizing optical emission spectroscopy (OES) as an inexpensive diagnostic technique. To determine the characteristics of the plasma, the radiation emitted by excited atoms, molecules, and reactive species in the cold plasma is collected and examined. The effect of raising the voltage was visible while analyzing the intensity of cold plasma’s optical emission spectra and measuring plasma parameters during diagnosis. The temperature and density of electron plasmas were measured using the two-ratio and Stark broadening methods. Electron temperature varied from 0.130 to 0.142&#xa0;eV, with electron density ranging from 4.50 × 10<sup>17</sup> to 9 × 1017&#xa0;cm<sup>− 3</sup> at 10 to 18 KV applied voltages. We also determined other basic plasma properties, including plasma frequency (f<sub>p</sub>), Debye length (λ<sub>D</sub>), and the number of particles in the Debye sphere (N<sub>D</sub>). We discovered that the applied voltage affects all plasma properties.</p>

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Optica Emission Spectroscopy Technique To Estimation Of Electron Temperature And Density Of Plasma Jet Induced By Applied AC High Voltage

  • 期刊论文

  • 发表日期：

    2025年3月13日

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  • Hagar H. Kadhim,
  • Raghad S. Mohammed,
  • Mohammed Al Marjine

摘要

Cold plasma sources have evolved fast in recent years as their use in various applications has increased. Extensive studies are being performed, focusing on the medicinal uses of cold atmospheric pressure plasma devices. Measurements of plasma characteristics (such as electron plasma temperature and density) are essential to ensure that the APCPJ is appropriate for the desired application. Thus, this study attempts to determine the electron temperature and density of a cold argon plasma jet caused by an AC high voltage utilizing optical emission spectroscopy (OES) as an inexpensive diagnostic technique. To determine the characteristics of the plasma, the radiation emitted by excited atoms, molecules, and reactive species in the cold plasma is collected and examined. The effect of raising the voltage was visible while analyzing the intensity of cold plasma’s optical emission spectra and measuring plasma parameters during diagnosis. The temperature and density of electron plasmas were measured using the two-ratio and Stark broadening methods. Electron temperature varied from 0.130 to 0.142 eV, with electron density ranging from 4.50 × 1017 to 9 × 1017 cm− 3 at 10 to 18 KV applied voltages. We also determined other basic plasma properties, including plasma frequency (fp), Debye length (λD), and the number of particles in the Debye sphere (ND). We discovered that the applied voltage affects all plasma properties.