Atmospheric-pressure DBD between plane steel mesh electrodes covered by dielectrics (borofloat glass, relative permittivity: 4.6); Electrode area: 8 cm^2; Thickness of dielectrics: 2 mm; Discharge gap: 1 mm; Voltage supply: sinusoidal voltage with variable amplitude and frequency of 86.2 kHz
\n" }, "medium": { "name": "Ar, TMS", "properties": "Gas temperature: 300 K; Pressure: 1 atm; Gas mixture: Ar + 0 to 200 ppm TMS
\n" }, "target": [], "diagnostics": { "name": "fluid-Poisson model, current measurement, voltage measurement", "properties": "Fluid-Poisson model:
\nMesh size: Non-equidistant spatial grid using typically 250 intervals with logarithmically refined mesh towards the boundaries; Time step size: adaptive time-step control
Voltage measurement:
\nHV probe: PHV 4002-3, dataTec, Reutlingen, Germany; Oscilloscope: MDO3052, Tektronix, Beaverton, OR, USA
Current measurement:
\nOscilloscope: MDO3052 from Tektronix, Beaverton, OR, USA; Methods: shunt resistor method using 1.00 \u2126 precision resistor and monitor capacitor method using 32.5 nF measuring capacitor
Fluid-Poisson model:
\nThe time-dependent, spatially one-dimensional fluid-Poisson model includes particle balance equations for the densities of electrons, relevant neutral particles and ions, the electron energy balance equation to determine the mean electron energy, the Poisson equation to calculate the electric potential and field, as well as a balance equation for the surface charge density to consider the accumulation of charge carriers on the dielectric surfaces.
Voltage measurement:
\nTo determine the ignition voltage U_i, the amplitude U_{a,0} of the applied voltage was increased step
\nby step for a specific Ar-TMS mixture until the discharge was ignited and covered the entire electrode area, i.e., U_i=U_{a,0}.
Current measurement:
\nThe current I(t) was obtained by monitoring the voltage drop at the precision resistor or the transferred charge at the measuring capacitor.