Characterization of an Atmospheric-Pressure Argon Plasma Generated by 915 MHz Microwaves Using Optical Emission Spectroscopy

Figure 2

Measured emission spectra of argon plasma (with a small amount of H₂O vapour) with selected argon 4p–4s and 5p–4s transition lines for Boltzmann plot method. Absorbed microwave power P_A = 3 kW and argon flow rate Q = 50 l/min.