Emissions flow inside of the pipe. A phenomenon occurs when the voltage through the
beads exceeds the insulating effect of the beads and millions of micro-discharges occur. The
duration of these discharges is measured in nano-seconds.8
The individual discharges cannot be
seen with the human eye, but the overall effect produces a silent glow. This effect will only
occur when the power source is alternating current (AC). DBD cannot be induced with direct
current (DC) power because the capacitive coupling of the dielectric necessitates an AC field