Optical Emission Spectroscopy of Hγ, Hα, and Hβ in a Glow Discharge Mixture of Ar/H2

In this paper, the addition of Ar to 112 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-gamma (434 nm), H-beta (486.1 nm), Ha (656.3 nm), and 112 (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(-3).