Torr-level, seedless, non-resonant velocity distribution function measurement with a dual-color, single-shot coherent Rayleigh-Brillouin scattering scheme

被引：1

作者：

Bak, Junhwi ^{[1
]}

Randolph, Robert ^{[1
]}

Gerakis, Alexandros ^{[1
,2
]}

机构：

[1] Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA

[2] Luxembourg Inst Sci & Technol, L-4422 Belvaux, Luxembourg

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2023年 / 56卷 / 07期

基金：

美国国家科学基金会;

关键词：

laser diagnostics; temperature and pressure measurement; gas diagnostics; plasma diagnostics; flow velocimetry; TEMPERATURE-MEASUREMENTS; PROFILES; AIR;

D O I：

10.1088/1361-6463/acb275

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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 similar to 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.

引用

页数：12