Using plasma propagation speed model for investigation of electron temperature of AR/N2 in non-thermal atmospheric pressure indirect-plasma jet

A high-speed single-frame ICCD camera has been used to observe a plasma propagation speed for electron temperature investigation. Space and time-resolved discharge images from a non-thermal atmospheric-pressure indirect path of bio-plasma jet are provided to measure group velocity (ug). The propagation velocity of the indirect Ar and mixture N2 (0–5%) plasmas along the plasma column has been shown to be in the order of 104 m/s, and that corresponds to an ion acoustic velocity (cs) in order of 102 m/s. Plasma has been generated by input discharge voltage of 3.0 kV at driving frequency of about 40 kHz. Particularly, there are two kinds of the electron, and it has been presented in atmospheric pressure non-thermal indirect-plasma jet. At slow electron energy, the average electron temperature has been found to be about 0.33 eV for Ar plasma and change to 0.42 eV for mixture Ar/N2 plasma. And regular electron energy, the average electron temperature has been found to be about 1.19 eV for Ar plasma and change to 1.40 eV for mixture Ar/N2 plasma. Implications of the results and directions for further studies are discussed.