Abstract
The aim of this work is to study the atmospheric pressure glow discharge (APG discharge) in neon. The discharge was generated between two metal electrodes, which were covered with an alumina layer. A small admixture of hydrogen could be added to neon. The type of the discharge (as concerning filamentary or glow discharge) was mainly derived from electrical measurements. The light emitted by the discharge was studied by means of optical emission spectroscopy (OES) with a temporal and spatial resolution. The results confirm that in neon the same type of diffuse dielectric-barrier discharge can be generated as in helium, namely a transient sub-normal glow discharge. This regime was also observed if up to 1% of hydrogen was added to neon. In general the recorded spectra consisted of atomic spectral lines of neon, as well as hydrogen atomic lines and molecular bands of N2 and OH due to external admixture or impurities in the carrier gas. When the amount of impurities was low enough, a continuous spectrum probably belonging to bremsstrahlung of electrons on neutral atoms was observed.
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