  In this work, the effect of flashing corona enhancement by introducing Teflon
dielectric enclosure in vicinity to the electrode assembly was studied. The
discharge operating in air without the dielectric was able to operate within a
very narrow voltage range of approximately 200 V. The pulsing frequency was
below 1.2 kHz and current peaks were below 14 mA. Increasing the applied
voltage onto the positive electrode beyond this range would result in sparks
between the electrodes. When the Teflon tube enclosure surrounding the high
voltage electrode was used, the window of stable flashing corona operation
expanded up to 3-5 kV. The pulsing frequency increased up to 12 kHz and the
current peak level increased to approximately 35 mA. Increasing voltage beyond
the point with peak pulsing frequency would result in a drop of pulsing
frequency until the discharge pulsations stopped completely. The Teflon
enclosure was able to enhance the average power deposited into the discharge
from 10 to 220 mWatt. In addition, the product gases of the enhanced flashing
corona were tested to be mostly ozone with traceable amount of NO$_2$. The
discharge used about 150 eV and 1950 eV per one ozone molecule and nitrogen
dioxide molecule respectively.
