DBD plasma source operated in single-filamentary mode for therapeutic use in dermatology
Priyadarshini Rajasekaran, Philipp Mertmann, Nikita Bibinov, Dirk Wandke, Wolfgang Vioel, Peter Awakowicz
JOURNAL OF PHYSICS D-APPLIED PHYSICS 42(22), volume 42, NOV 21 2009
Our dielectric barrier discharge (DBD) plasma source for bio-medical application comprises a copper electrode covered with ceramic. Objects of high capacitance such as the human body can be used as the opposite electrode. In this study, the DBD source is operated in single-filamentary mode using an aluminium spike as the opposite electrode, to imitate the conditions when the discharge is ignited on a raised point, such as hair, during therapeutic use on the human body. The single-filamentary discharge thus obtained is characterized using optical emission spectroscopy, numerical simulation, voltage-current measurements and microphotography. For characterization of the discharge, averaged plasma parameters such as electron distribution function and electron density are determined. Fluxes of nitric oxide (NO), ozone (O-3) and photons reaching the treated surface are simulated. The calculated fluxes are finally compared with corresponding fluxes used in different bio-medical applications.