Optical depth measurement of self-reversed line emitted from in-homogenous plasma in laser induced breakdown spectroscopy

IF 1.6 3区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS

High Energy Density Physics Pub Date : 2023-12-01 DOI:10.1016/j.hedp.2023.101069

Jalloul Trabelsi, Mounir Esboui, Neïla Terzi

引用次数: 0

Abstract

In this work, an original method is proposed and used for measurement of the optical depth of a self-reversed spectral line. A theoretical approach is utilized in an inhomogenous laser induced plasma at local thermodynamic to simulate self-reversed line and then to get the main line profile without self-absorption. The spatial and temporal evolution of optical depth of two spectral lines of Ca II at 393.4 nm and 396.9 nm is studied. Furthermore, the variation of optical depth versus the concentration of species emitter inside of plasma plume is investigated. In addition, the validity of this method is affirmed during comparison with results obtained by other techniques.

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激光诱导击穿光谱中非均匀等离子体发射自反转线的光学深度测量

本文提出了一种测量自反转光谱线光深的新方法。利用理论方法，在局部热力学条件下模拟非均匀激光诱导等离子体的自反转线，得到无自吸收的主线轮廓。研究了Ca II在393.4 nm和396.9 nm处两条光谱线光深的时空演变。此外，还研究了等离子体羽流内部光深随物质发射体浓度的变化规律。并与其他方法的结果进行了比较，验证了该方法的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

High Energy Density Physics PHYSICS, FLUIDS & PLASMAS-

CiteScore

4.20

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： High Energy Density Physics is an international journal covering original experimental and related theoretical work studying the physics of matter and radiation under extreme conditions. ''High energy density'' is understood to be an energy density exceeding about 1011 J/m3. The editors and the publisher are committed to provide this fast-growing community with a dedicated high quality channel to distribute their original findings. Papers suitable for publication in this journal cover topics in both the warm and hot dense matter regimes, such as laboratory studies relevant to non-LTE kinetics at extreme conditions, planetary interiors, astrophysical phenomena, inertial fusion and includes studies of, for example, material properties and both stable and unstable hydrodynamics. Developments in associated theoretical areas, for example the modelling of strongly coupled, partially degenerate and relativistic plasmas, are also covered.