arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.08783physics.plasm-ph
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laser产生等离子体的光学诊断

Optical diagnostics of laser-produced plasmas

S. S. Harilal, M. C. Phillips, D. H. Froula, K. K. Anoop, R. C. Issac, F. N. Beg

摘要:

激光产生的等离子体(LPPs)基于照射条件、目标几何形状和背景覆盖气体而吞没温度、密度、压力、磁场和电场、电荷状态、带电粒子动力学和气相反应的奇异和复杂条件。LPP的应用潜力是如此的多样化,以至于它在基础和应用研究领域都产生了相当大的兴趣。虽然大多数传统的表征技术开发的其他等离子体源可以用来表征的LPP,必须小心解释的结果,因为它们的小尺寸,瞬态性质,和不均匀性。大的时空密度和温度梯度的存在往往需要在距离和时间上进行非均匀加权平均。在各种等离子体表征工具中,基于光学的诊断工具在LPP参数的精确测量中起着关键作用。光学工具箱包含光学探测方法(汤姆逊散射,阴影,纹影,干涉,测速和偏转),光谱学(发射,吸收和荧光),以及被动和主动成像。每种技术都可用于测量特定的属性,并且由于与所选测量工具相关的灵敏度问题,其使用仅限于LPP演进期间的某个时间跨度。因此,多种诊断工具对于全面了解整个等离子体行为至关重要。近年来,激光器和检测器系统性能的改进扩展了上述被动和主动诊断工具的能力。这篇评论提供了一个概述的光学诊断工具,经常采用的LPP的表征,并强调技术,相关的假设和挑战。

英文摘要:

Laser-produced plasmas (LPPs) engulf exotic and complex conditions ranging in temperature, density, pressure, magnetic and electric fields, charge states, charged particle kinetics, and gas-phase reactions, based on the irradiation conditions, target geometries, and the background cover gas. The application potential of the LPP is so diverse that it generates considerable interest for both basic and applied research areas. Although most of the traditional characterization techniques developed for other plasma sources can be used to characterize the LPPs, care must be taken to interpret the results because of their small size, transient nature, and inhomogeneities. The existence of the large spatiotemporal density and temperature gradients often necessitates non-uniform weighted averaging over distance and time. Among the various plasma characterization tools, optical-based diagnostic tools play a key role in the accurate measurements of LPP parameters. The optical toolbox contains optical probing methods (Thomson scattering, shadowgraphy, Schlieren, interferometry, velocimetry, and deflectometry), optical spectroscopy (emission, absorption, and fluorescence), and passive and active imaging. Each technique is useful for measuring a specific property, and its use is limited to a certain time span during the LPP evolution because of the sensitivity issues related to the selected measuring tool. Therefore, multiple diagnostic tools are essential for a comprehensive insight into the entire plasma behavior. In recent times, the improvements in performance in the lasers and detector systems expanded the capability of the aforementioned passive and active diagnostics tools. This review provides an overview of optical diagnostic tools frequently employed for the characterization of the LPPs and emphasizes techniques, associated assumptions, and challenges.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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