Light scattering from Ne, Ar, and Xe arcs
作者:
L. Vriens,
M. Adriaansz,
期刊:
Journal of Applied Physics
(AIP Available online 1974)
卷期:
Volume 45,
issue 10
页码: 4422-4431
ISSN:0021-8979
年代: 1974
DOI:10.1063/1.1663067
出版商: AIP
数据来源: AIP
摘要:
A procedure is described whereby nonresonant polarized and depolarized Rayleigh, electronic Raman, and Thomson scattering are used as a diagnostic tool for high‐pressure nonhomogeneous plasmas. The method is applied to 0.1–3 atm Ne, Ar, and Xe arcs, with currents not exceeding 3 A. Polarized Rayleigh scattering is dominant in these cases. Radial gas temperature and density distributions, an axis electron density, and upper limits of excited state and electron densities are obtained. The temperature range covered extends from about 350 K (near the wall) up to 4500 K (at the axis of a 2‐A 3‐atm Ne arc). A comparison with spectroscopically obtained temperatures is shown to yield interesting information on the deviations from local thermodynamic equilibrium.
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