Characterization of a Low-Cost Kilohertz-Driven Plasma Pen Operated in Ar Gas

This work describes the physical properties of a self-designed kilohertz-driven plasma pen operated in Ar designed for biomedical applications. The special design of the plasma pen resulted in stable operation at gas flow as low as 100
$\hbox{cm}^{3}\cdot\hbox{min}^{-1}$
. Important plasma parameters such as electron concentration
$n_{e}$
, electron temperature
$T_{e}$
and gas temperature
$T_{g}$
, and geometry of the discharge jet were estimated using both electric measurements and optical emission spectroscopy.