Laboratory measurements of the opacity of solar plasmas

太阳等离子体不透明度的实验室测量

• 批准号: EP/F019289/1
• 负责人: Greg Tallents
• 金额: $ 110.33万
• 依托单位: University of York
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FF019289%2F1
• 关键词: Laboratory; measurements; opacity; solar; plasmas

Accurate quantitative opacities relevant to the boundary between the convection and radiative zone of the Sun and other similar plasmas will be made using a novel EUV laser probing technique. To produce quantitative opacity measurements that can be used to improve the precision of the Rosseland mean opacity employed in the Standard Solar Model, we need to implement advances in experimental technique and increase the plasma density and temperature uniformity and range of measurement alongside a major modelling and simulation effort on plasma opacity. The positions of spectral lines and their oscillator strengths are tabulated by databases such as the Opacity Project. Our measurements will enable comparisons between theory and experiment to check the systematic absolute accuracy of the spectral line wavelengths (to within +/- 0.02 nm) and the accuracy of spectral line broadening models at high density (again to within +/- 0.02 nm). The measurement of laser ablation using EUV laser probing under different ablation regimes including with x-ray heating will be explored and the production of plasmas directly by focussed EUV irradiation will be investigated.

利用一种新的极紫外激光探测技术，将对太阳和其他类似等离子体的对流和辐射区之间的边界进行精确的定量不透明度测量。为了产生定量的不透明度测量，可用于提高标准太阳模型中采用的Rosseland平均不透明度的精度，我们需要在实验技术方面取得进展，并增加等离子体密度和温度的均匀性和测量范围，同时对等离子体不透明度进行主要的建模和模拟。谱线的位置和它们的振子强度由数据库如不透明度项目制成表格。我们的测量将使理论和实验之间的比较，以检查光谱线波长的系统绝对精度（在+/- 0.02 nm内）和光谱线展宽模型在高密度（再次在+/- 0.02 nm内）的准确性。将探索在不同烧蚀制度下使用EUV激光探测测量激光烧蚀，包括X射线加热，并将研究直接通过聚焦EUV照射产生等离子体。

项目成果

Extreme ultraviolet interferometry of warm dense matter in laser plasmas.

激光等离子体中热致密物质的极紫外干涉测量。

• DOI: 10.1364/ol.35.003820
• 发表时间: 2010
• 期刊: Optics letters
• 影响因子: 3.6
• 作者: Gartside LM

Measurements of opacity and temperature of warm dense matter heated by focused soft X-ray laser irradiation

聚焦软 X 射线激光照射加热的热致密物质的不透明度和温度测量

• DOI: 10.1016/j.hedp.2009.03.006
• 发表时间: 2009
• 期刊: High Energy Density Physics
• 影响因子: 1.6
• 作者: Tallents G