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Measurements of free-free absorption in warm dense aluminium
Plasma Physics and Controlled Fusion ( IF 2.2 ) Pub Date : 2021-06-04 , DOI: 10.1088/1361-6587/ac0353
C Hyland 1 , S White 1 , B Kettle 2 , R Irwin 1 , D Bailie 1 , M Yeung 1 , G Williams 3 , R Heathcote 4 , I East 4 , C Spindloe 4 , M Notley 4 , D Riley 1
Affiliation  

Extreme ultraviolet radiation from a high harmonic source has been used to measure the free-free attenuation coefficient and real refractive index of warm dense aluminium, with sample conditions of near solid density and temperature of 0.9 0.23 eV. These were compared to results from the literature, where the measured attenuation coefficients showed some consistency with the modelling and existing data from a previous experiment. The absolute values of the attenuation coefficient were found to reside between the different sets of models for the warm dense matter (WDM) attenuation coefficient, and were found to be more in line with modelling and measurements of the cold opacity from the literature. Novel measurements of the real refractive index of WDM were also achieved—while ambiguity makes these measurements consistent with all the models, they prove useful as a proof-of-concept for future WDM studies.



中文翻译:

暖致密铝中游离吸收的测量

来自高次谐波源的极紫外辐射已被用于测量暖致密铝的自由衰减系数和真实折射率,样品条件为近固体密度和温度为 0.9 0.23 eV。将这些结果与文献结果进行比较,其中测量的衰减系数显示出与先前实验的建模和现有数据的一些一致性。发现衰减系数的绝对值位于不同的暖致密物质 (WDM) 衰减系数模型集之间,并且发现更符合文献中冷不透明度的建模和测量。还实现了 WDM 真实折射率的新测量——而模糊性使这些测量与所有模型一致,

更新日期:2021-06-04
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