Development of a Cold Atmospheric Plasma Array
College of Engineering
Department of Electrical & Computer Engineering
Dr. Jim Browning
Cold atmospheric pressure plasma (CAP) is being studied as a method to remove bacteria and biofilms on surfaces. Experiments are being conducted with a parallel plate plasma source fabricated from a low temperature co-fired ceramic (LTCC). The CAP operates at 20 kHz and 2-4 kV, driving a discharge current of 1-3 mA. The main limitation to this current apparatus is the plasma device size (2 mm x 2 cm), which requires the biofilm sample to rotate to achieve coverage of a typical sample of 2 cm x 2 cm. In order to resolve this inconsistency in data collection, an array of plasma sources is being developed. This new configuration will allow for even streams of plasma to come in contact with an entire sample of bacteria all at once. In the research to be presented, different array designs are tested to determine the optimal configuration. However, initial inconsistencies in the geometry of the sources, results in different plasma discharge condition in each source. Ballast resistors (~ 100 kΩ) are connected to the ground side of each CAP source in order to improve the uniformity of the plasma discharge. Preliminary results show this method does improve plasma uniformity.
Tran, Steven; Sheets, Megan; and Simmons, Zach, "Development of a Cold Atmospheric Plasma Array" (2019). 2019 Undergraduate Research and Scholarship Conference. 176.