Measurement of translational temperature of neutral species in low temperature plasmas in a DC glow discharge
Auteurs
Randolph R., Bak J., Gerakis A.
Référence
AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022, art. no. AIAA 2022-0287, 2022
Description
Single-shot coherent Rayleigh Brillouin scattering (CRBS) is applied to measure simultaneously the temperature and density of neutral particles in a weakly ionized DC glow discharge plasma. The DC glow discharge is generated at a pressure range of 15 Torr using xenon gas. For this application, we employ a newly developed dual-color CRBS scheme where the frequency doubled 532 nm beam serves as a probe beam to achieve a higher signal-to-noise ratio at the low-pressure environment versus the most commonly employed single color CRBS approach. The temperature and density of neutral xenon particles inside the DC glow discharge is evaluated simultaneouslyby analyzing the resolved single-shot CRBS lineshapes, and is characterized as a function of the discharge current, successfully demonstrating the use of CRBS in a partially ionized plasma environment.
