Introduction
Atmospheric radio-frequency plasma
Advantage
-High-density plasmacan be generate
-Low cost (because does not require a vacuum system)
Generating method
DBD (Dielectric Barrier Discharge)
-The DBD pladma canbe easily generated using simple equipments configuration
-The non-thermal equilibrium plasma can be generatedunder atmospheric-pressure
DBD reactor
Heat generation by discharge
-Dielectric barrier
-Electrode temperature increased
However, the temperature gradient exhibits a complex spacial distribution and an unstale time evolution because of gas flow and heat transfer characteristics.
To avoid the instability, temperature of the dielectric barrier was controlled by heating or cooling the DBDreactor.
Effect of thetemperature of reactor and gas
-Heating of the barrier by discharge
-cooling the discharge gas in cryogenic
Effect on the discharge aspect (ex. Self-organization ofdischarge plasma)
The inherent variability associated with the temperature of the dielectric barrier
Purpose
To identify the discharge mode of a stable atmospheric RF DBD having two regions (i.e. Bright and dark regions) under condition of controlled barrier temperature