title: Uniform and non-uniform modes of nanosecond-pulsed dielectric barrier discharge in atmospheric air: fast imaging and spectroscopic measurements of electric field.
abstract: In this study, we report experimental results on fast ICCD imaging of development of nanosecond-pulsed dielectric barrier discharge (DBD) in atmospheric air and spectroscopic measurements of electric field in the discharge. Uniformity of the discharge images obtained with nanosecond exposure times were analyzed using chi-square test. The results indicate that DBD uniformity strongly depends on applied (global) electric field in the discharge gap, and is a threshold phenomenon. We show that in the case of strong overvoltage on the discharge gap (provided by fast rise times), there is transition from filamentary to uniform DBD mode which correlates to the corresponding decrease of maximum local electric field in the discharge.
authors: A. J. Drexel Plasma Institute, Camden NJ 08103.
authors: Chong
authors: C
authors: Liu
authors: A. J. Drexel Plasma Institute, Camden NJ 08103.
authors: Danil
authors: D
authors: Dobrynin
authors: A. J. Drexel Plasma Institute, Camden NJ 08103.
authors: Alexander
authors: A
authors: Fridman
keywords: atmospheric air DBD uniformity; dielectric barrier discharge; electric field measurement; uniformity analysis