Experimental study of energy delivered to the filaments in high pressure nanosecond surface discharge

Ding, Chenyang; Jean, Antonin; Shcherbanev, Sergey; Selivonin, I. V.; Moralev, I. A.; Попов, Н. А.; Starikovskaia, Svetlana

doi:10.2514/6.2020-1662

Cited by 3 publications

(1 citation statement)

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“…The difference between two polarities is the shape of the streamer front. The feather like structure can be seen better at negative polarity, which was reported in [9]. And for rest columns of figure 2, discharge only appears at the central channels rather than the propagation front.…”

Section: Resultssupporting

confidence: 58%

Spectral micro-scale measurements of the initial stage of streamer-to-filament transition in high pressure nanosecond surface dielectric barrier discharge

Ding

Jean

Попов

et al. 2021

AIAA Scitech 2021 Forum

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The paper presents the recent study of spectral composition of the filament during its propagation process in the single shot surface nanosecond dielectric barrier discharge (nSDBD) at high pressures. The micro-images and spectra at specific moments were recorded by the ICCD camera and spectrometer accompanied with the long distance microscope. This is the first time that we analysis nSDBD in the micrometer scale. The discharge starts with the streamer generated from the high-voltage electrode. A few nanoseconds later, there are a few protrusions passing through the streamer front. After the protrusions' propagation, the filaments are formed in the whole channel connecting the high-voltage electrode and the tip of protrusions. It is found that in the early stage of the streamer-to-filament transition, both the streamer and the protrusion are contributed by the second positive system of nitrogen while only when the whole filament is formed, the cw emission can be seen.

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Section: Resultssupporting

confidence: 58%