Torr-level, seedless, non-resonant velocity distribution function measurement with a dual-color, single-shot coherent Rayleigh–Brillouin scattering scheme
Torr-level, seedless, non-resonant velocity distribution function measurement with a dual-color, single-shot coherent Rayleigh–Brillouin scattering scheme
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DOI：
10.1088/1361-6463/acb275
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发表时间：
2023-01
期刊：
影响因子：
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通讯作者：
J. Bak;R. Randolph;A. Gerakis
中科院分区：
文献类型：
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作者：
J. Bak;R. Randolph;A. Gerakis
提出了一种新的单次双色相干瑞利-布里渊散射（CRBS）方法，可以在速度分布函数测量中获得两个数量级的光谱采集性能。通过执行这种非共振和无籽光谱诊断技术，能够获得一个频谱在300纳秒，我们展示了准确的温度（范围从300 K到500 K）和压力（范围从760托下降到1托）测量能力，为各种原子，分子和多物种气体。这证明了双色CRBS方案在各种气体的宽压力和温度范围内的气体热力学表征能力，预计将对从航空航天应用到低温等离子体的众多领域产生极大的兴趣，为一系列气体提供中性粒子物理特性的精确测量。
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.