Abstract
The spectroscopic characteristics of a bipolar, overstressed discharge of nanosecond duration between zinc electrodes in oxygen at a pressure p(O2) = 13.3 kPa are presented. In the process of microexplosions of inhomogeneities on the working surfaces of the electrodes in a strong electric field, zinc vapor is introduced into the discharge gap. This creates the prerequisites for the formation of zinc oxide molecules and clusters in the plasma and the synthesis of thin island zinc oxide films, which can be deposited on a dielectric substrate installed near the center of the discharge gap. The spectral characteristics of the discharge were investigated from the central part of the discharge gap 2 mm in size. The main excited components of the plasma of a vapor-gas mixture based on zinc and oxygen were established at high values of the parameter E / N (where E is the electric field strength; N is the total concentration of particles in the plasma), which, when deposited outside the discharge plasma, can lead to the formation of fine nanostructured films based on zinc oxide.
Highlights
The optical characteristics of a nanosecond discharge in air at atmospheric pressure at a distance between the metal electrodes d = 1-2 cm are determined in the UV range of the emission spectrum of the bands of the second positive system of the nitrogen molecule (280390 nm), hydroxyl radicals (OH), nitrogen oxides (NO), bands of carbon nitride (CN), as well as individual spectral lines of atoms and singly charged ions of nitrogen and oxygen [1]
Under the action of a beam of runaway electrons and the accompanying X-ray radiation, which play the role of preionization, a spatial homogeneous discharge is formed in the discharge gaps of the "sphere - sphere" type with an inhomogeneous distribution of the electric field strength, which can be used to develop new UV lamps with a small volume plasma medium (V
It was found that at an oxygen pressure of 13.3 kPa between zinc electrodes, at interelectrode distances of 2 and 7 mm, a sufficiently uniform in space intense nanosecond discharge with a pulsed electric power of up to 0.6 MW and an energy contribution to the plasma in one pulse was ignited
Summary
ФІЗИКА І ХІМІЯ ТВЕРДОГО ТІЛА Т. 22, No 4 (2021) С. 717-723 Фізико-математичні науки. The spectroscopic characteristics of a bipolar, overstressed discharge of nanosecond duration between zinc electrodes in oxygen at a pressure p (O2) = 13.3 kPa are presented. In the process of microexplosions of inhomogeneities on the working surfaces of the electrodes in a strong electric field, zinc vapor is introduced into the discharge gap. This creates the prerequisites for the formation of zinc oxide molecules and clusters in the plasma and the synthesis of thin island zinc oxide films, which can be deposited on a dielectric substrate installed near the center of the discharge gap. The main excited components of the plasma of a vapor-gas mixture based on zinc and oxygen were established at high values of the parameter E/N (where E is the electric field strength; N is the total concentration of particles in the plasma), which, when deposited outside the discharge plasma, can lead to the formation of fine nanostructured films based on zinc oxide.
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