Optical Emission Spectroscopy of H<inline-formula> <tex-math notation="LaTeX">$_{\mathrm {\gamma }}$ </tex-math> </inline-formula>, H<inline-formula> <tex-math notation="LaTeX">$_{\mathrm {\alpha }}$ </tex-math> </inline-formula>, and H<inline-formula> <tex-math notation="LaTeX">$_{\mathrm {\beta }}$ </tex-math> </inline-formula> in a Glow Discharge Mixture of Ar/H2

Abstract

In this paper, the addition of Ar to H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> is experimentally investigated. This paper primarily aims to observe the effects that this addition has on the intensity of hydrogen emission lines in a glow discharge mixture. The total pressure was 3 torr, at a power level of 3.9 W. Optical emission spectroscopy was used for plasma characterization, and the principal species observed were H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">γ</sub> (434 nm), H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">β</sub> (486.1 nm), H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">α</sub> (656.3 nm), and H <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> (603.1 nm), and Ar I (750.5 nm), Ar I (763.5 nm), and Ar I (811.6 nm). The electron temperature and ion density were determined by a double Langmuir probe. The electron temperature was found to be in the range of 2.5-6.5 eV, and the ion concentration was on the order of 109 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-3</sup> .