Electrical analysis and ultra-fast sequential imaging of surface barrier discharge with streamer-leader sequence generated with 100 kHz frequency at the water interface

Abstract

A time resolved study of the electrical parameters and ultra-fast 2D imaging of the surface barrier discharge emerging from liquid electrodes in atmospheric pressure argon is reported. Analysing the electrical measurements and the charge-voltage (Q-V) plots, a resistive component of the electrical system impedance is revealed and described by the logical progression of the method to current-voltage (I-V) plots. The necessity to include a resistive component in the simplest equivalent circuit is demonstrated. Net discharge current, charge or effective gap voltage are linked to the light emission. A special nanosecond-gated camera enabling multiple expositions within a few hundreds of nanoseconds is applied and reveals the spatiotemporal development of the discharge luminosity. Propagation of the streamer-leader stepping sequence on the dielectric surface is observed and the mean velocities and axial light-emission development is quantified. A light emission of an excited gas prior to and after the discharge's main current peak is detected revealing an increased activity between the subsequent discharges. This is caused by the high pre-ionisation of the gas volume and the intensive charging of the surface. The generation of subsequent streamers emerging from/between the surface charge domains is evidenced.

Dependence of dissipated power on applied voltage for surface barrier discharge from simplest equivalent circuit

“…The comparison of the results obtained with the equations ( 3) and (8) with experimental data is presented in figure 2. The measurements were taken from [14] and has been obtained with SDBD samples prepared by printed circuit board technology with 0.5 mm thick dielectric (FR-4 TG135) and straight electrodes, operated at ambient air.…”

“…For this reasons the first fit was made assuming C = 0 and C 0 = C cell . The obtained values of the coefficient α and V 0 were used as the initial parameters for the second fit by equation (8). The resulting values of the coefficients are presented in the first two rows of table 1.…”

“…1 and no. 2 are the active phase of the discharge by equation (8). Others are for fitting the dissipated power by equation (no.…”

“…The circuit of partial discharging [7] can partly consider the SDBD expansion [4], but the charge derivative of the voltage is suggested for the determination of the DBD capacitance [3], which has more complex physical interpretation in case of SDBDs [2]. In [8], a constant value resistor was introduced to the circuit, however we believe that the resistor represents high humidity in the set-up rather then a general peculiarity of the SDBD. The equivalent circuits for SDBDs on the basis of an infinite number of elements were presented in [9] and in [10].…”

Analysis of the effects of complex electrode geometries on the energy deposition and temporally and spatially averaged electric field measurements of surface dielectric barrier discharges

“…This effect of pulling out the Lissajous figure was described by Kriegseis et al [20] The effect of resistance on Lissajous figures can be seen in Figure 3. This resistance has been observed in other SDBDs as well, [21] and it is hypothesized here that it most likely stems from the manufacturing of SDBDs using an adhesive to attach the dielectric and conductive layers, resulting in a resistive adhesive layer to the electrode. Other manufacturing procedures that do not rely on adhesives have not reported a considerable equivalent series resistance.…”