Electron Temperature and Density of Non-Thermal Atmospheric Pressure Argon Plasma Jet by Convective Wave Packet Model

The propagation velocities ($u_g$) of argon plasma jet are obtained by intensified charge coupled device (ICCD) camera images at fixed gate width time of 5 ns. The propagation velocities in upstream and downstream regions are in the order of $10^4-10^5m/s$. The plasma ambipolar diffusion velocities are measured to be in the order of $10-10^2m/s$. Plasma jet discharges are generated by sinusoidal power supply in varying voltages from 2 to 4 kV at repetition frequency of about 40 kHz. By employing convective wave packet model, the electron temperature ($T_e$) inside plasma bullet for argon non-thermal atmospheric pressure plasma jet is estimated to be about 1.18 eV. Also, the electron density ($n_e$) is found to be $8.0{\times}10^{14}-2.5{\tim}10^{15}cm^{-3}$.