An electric field in nanosecond surface dielectric barrier discharge at different polarities of the high voltage pulse: spectroscopy measurements and numerical modeling

摘要

The ratio of emission intensities of the second positive N-2(C-3 Pi(u), nu' = 0). N-2(B-3 Pi(g), nu = 0), 337.1 nm and first negative N-2(+)(B-2 Sigma(+)(g), nu' = 0) -> N-2(+) (X-2 Sigma(+)(g), nu = 0), 391.4 nm systems of nitrogen have been measured in a nanosecond surface dielectric barrier discharge (SDBD). The measurements were carried out in synthetic air for a pressure range 1-3 bar for different polarities of the high-voltage (HV) pulse. For all the investigated conditions, the ratio of emission intensities at the wavelengthes 391.4 and 337.1 nm, measured experimentally, R-391/337(exp) is systematically higher for the positive polarity of HV electrodes.