Plasma propagation speed and electron temperature of ar and N2 in atmospheric pressure non-thermal bioplasma jet

摘要

Space and time resolved discharge images from an atmospheric pressure non-thermal bioplasma jet have been observed by a high-speed single-frame camera to investigate the electron temperatures. The Ar and Ar/N2 plasma propagation speed with the group velocity in the plasma column of jet has been shown to be about 3.4–4.8 km/s of the early part, and about 1.2–1.5 km/s of the late part of plasma exposure with an input discharge voltage of 3.0 kV and driving frequency of about 44 kHz. Particularly, the electron temperature in atmospheric pressure non-thermal bioplasma jet were found to be about 4.9–9.8 eV of the early part, and about 0.6–1.0 eV of the late part of plasma exposure, respectively. Implications of the results and directions for further studies are discussed.