The Spectral Characteristics of Ne-Ar Gas Mixtures in a Positive Column of a Discharge Tube with and without Superimposed RF Powers

Abstract

The spectral intensities emitted from a positive column in a rectangular discharge tube were measured as functions of the gas pressure, mixing ratio of argon/neon, and with and without superimposed RF powers. The tube used for measurements has a rectangular profile of 2×4cm. The discharge current was 20mA. The gas pressure was varied from 0.2 to 10 Torr. The superimposed RF power having a frequency of 13.56MHz varied from 0 to 30W. The experimental results were discussed qualitatively.