Torr-level, seedless, non-resonant velocity distribution function measurement with a dual-color, single-shot coherent Rayleigh-Brillouin scattering scheme
Authors
Bak J., Randolph R., Gerakis A.
Reference
Journal of Physics D: Applied Physics, vol. 56, n° 7, art. no. 074001, 2023
Description
A two order of magnitude spectral acquisition improvement in velocity distribution function measurement is demonstrated with a novel single-shot, dual-color coherent Rayleigh-Brillouin scattering (CRBS) scheme. By performing this non-resonant and seedless spectral diagnostic technique, capable of obtaining a spectrum in ∼ 300 ns, we demonstrate accurate temperature (ranging from 300 K to 500 K) and pressure (ranging from 760 Torr down to 1 Torr) measurement capabilities, for a variety of atomic, molecular and multispecies gases. This demonstrated gas thermodynamic characterization capability of the dual-color CRBS scheme over broad ranges of pressure and temperature for a variety of gases is anticipated to be of great interest to a plethora of fields, ranging from aerospace applications to low-temperature plasmas, providing with an accurate measurement of physical properties of neutral particles, for a range of gases.
