Abstract
Optical and electrical properties of a fast (∼50 ns) discharge in pure Xe were studied experimentally and simulated numerically. Afterglow vacuum ultraviolet (VUV) emission was revealed lasting for a few microseconds. Its duration depended on the Xe gas pressure. The length of the discharge was 42 cm. Operation of the discharge was limited in gas pressure by the development of instability. The highest pressure of pure Xe for a stable discharge run was 0.9 bars. A detailed kinetic model of discharge plasma was developed, which calculated self-consistently the electron energy distribution function and excited states including dimer population dynamics. VUV emission dynamics observed experimentally can be explained theoretically only in a model with an essentially increased number of electronic states taken into account. Calculated discharge voltage history and VUV emission dynamics agree satisfactorily with measurements.
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