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面向多散射角温稠密物质的无模型温度诊断

Towards Model-free Temperature Diagnostics of Warm Dense Matter from Multiple Scattering Angles

Hannah M. Bellenbaum, Benjamin Bachmann, Dominik Kraus, Thomas Gawne, Maximilian P. Böhme, Tilo Döppner, Luke B. Fletcher, Michael J. MacDonald, Zhandos A. Mold… 展开作者

Hannah M. Bellenbaum, Benjamin Bachmann, Dominik Kraus, Thomas Gawne, Maximilian P. Böhme, Tilo Döppner, Luke B. Fletcher, Michael J. MacDonald, Zhandos A. Moldabekov, Thomas R. Preston, Jan Vorberger, Tobias Dornheim

AI总结:

本文提出一种无模型的多散射角X射线汤姆逊散射分析方法,用于温稠密物质温度诊断,在LCLS等容加热石墨实验中验证了小角与大角温度的一致性,并指向改进实验装置。

摘要:

温稠密物质(WDM)在天体物理对象和技术应用中扮演着重要角色,但相应实验的严格诊断以困难著称。在本工作中,我们提出了一种对多散射角X射线汤姆逊散射(XRTS)测量的无模型分析方法。具体而言,我们分析了在直线加速器相干光源(LCLS)上对等容加热石墨所收集的散射数据。总体而言,我们发现小散射角与大散射角之间提取的温度具有良好的一致性,而可能的非平衡特征可能被源函数以及可用的动态光谱范围所掩盖。本原理验证研究直接指向了改进的状态方程测量实验装置以及无模型弛豫时间研究。

英文摘要:

Warm dense matter (WDM) plays an important role in astrophysical objects and technological applications, but the rigorous diagnostics of corresponding experiments is notoriously difficult. In this work, we present a model-free analysis of x-ray Thomson scattering (XRTS) measurements at multiple scattering angles. Specifically, we analyze scattering data that have been collected for isochorically heated graphite at the Linac Coherent Light Source (LCLS). Overall, we find good consistency in the extracted temperature between small and large scattering angles, whereas possible signatures of non-equilibrium may be hidden by the source function, and by the available dynamic spectral range. The present proof-of-principle study directly points to improved experimental set-ups for equation-of-state measurements and for the model-free study of relaxation times.

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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