Cross-Correlation Spectroscopy Study Of Negative Polarity Transient Spark Discharge Evolution In Ambient Air
Janda M., Sarani A., Gerling T., Brandenburg R., Machala Z.
21st Symposium on Application of Plasma Processes, Štrbské Pleso, Slovakia, January 13-18, p. 208-212 (2017)
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Abstract: A streamer-to-spark transition in a self-pulsing transient spark (TS) discharge of negative polarity in air was investigated using cross-correlation spectroscopy. The temporal evolution of the TS was
recorded for several spectral bands and lines: the second positive system of N2 (337.1 nm), the first negative system of N2+ (391.4 nm), and atomic oxygen (777.1 nm). The results enable the visualization of the different phases of discharge development including the streamer, followed by
the return stroke. The transition to the spark was not recorded due to relatively long (0.3-1.5 μs) and irregular duration of the streamer-to-spark transition phase.
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