We have already studied atmospheric pressure surface
barrier discharge (APSBD) in air using kinds of pectinate
electrodes panels driven by audio-frequency power and
experimentally proved that such APSBD plasma was a very
simple, effective and innocuous tool for sterilization [10].
We found that if we offered a gas flow to blow out the
APSBD plasma and concentrated the highly active nonequilibrium
plasma into one line, we could obtain atmospheric
pressure plasma jet driven by audio-frequency power.
In the present study, we have developed two structure types
of atmospheric pressure plasma jet sources named PJ-1 and
PJ-2, which are driven by easily generated audio-frequency
power variable range from 5 kHz to 20 kHz. Using PJ-1 or
PJ-2, we can obtain a stable, near-homogeneous, arc-free
dielectric barrier discharge (DBD) with argon at atmospheric
pressure, without water-cooling device.