XUV and X-ray Probing of Warm Dense Matter

热致密物质的 XUV 和 X 射线探测

• 批准号: EP/N009487/1
• 负责人: David Riley
• 金额: $ 78.3万
• 依托单位: Queen's University Belfast
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FN009487%2F1
• 关键词: XUV; ray; Probing; Warm; Dense

In this research we are seeking to further investigate a very interesting form of matter called 'warm dense matter' or WDM. This is a state of matter that is expected to be found, for example, in the cores of giant planets like Jupiter and Saturn and to a lesser extent the Earth. The matter is characterized by being at high density (sometimes above normal solid density) and at an elevated temperature ranging from 10,000K to well above 1 million degrees. This means that the pressure is enormous, reaching several million times atmospheric pressure. Under these conditions the matter is not expected to behave either like a normal solid or like a classical plasma. We will make samples of warm dense matter in a variety of ways. One of these involves using intense laser pulses to drive very strong shocks into solid samples, thus compressing and heating them. We will probe these samples with intense x-rays generated from another laser-plasma. This takes place on a timescale of less than a billionth of a second. The results will test the electronic structure of the matter under WDM conditions. In other types of experiment, we will heat solid foils with x-rays generated from laser-heated targets. This will raise the temperature of the solid matter to several thousand degrees. We will probe this matter with XUV radiation generated from gas-laser interactions using high harmonics of the initial laser wavelength. This will help to measure the degree to which XUV radiation is absorbed.

在这项研究中，我们试图进一步研究一种非常有趣的物质形式，称为“热致密物质”或WDM。例如，这是一种物质状态，预计会在木星和土星等巨型行星的核心中找到，在较小程度上也会在地球中发现。这种物质的特征是密度高(有时高于正常固体密度)，温度从10000K到远高于100万度的高温。这意味着压力是巨大的，达到大气压的几百万倍。在这些条件下，物质的行为既不像正常的固体，也不像经典的等离子体。我们将以各种方式制作热致密物质的样本。其中之一涉及使用强激光脉冲将非常强的冲击波驱动到固体样品中，从而对它们进行压缩和加热。我们将用另一种激光等离子体产生的强X射线探测这些样品。这发生在不到十亿分之一秒的时间尺度上。结果将测试WDM条件下物质的电子结构。在其他类型的实验中，我们将用激光加热目标产生的X射线来加热固体箔。这将把固体物质的温度提高到几千度。我们将利用气体-激光相互作用产生的XUV辐射来探测这个问题，使用的是初始激光波长的高次谐波。这将有助于测量XUV辐射被吸收的程度。

项目成果

Experimental measurements of the collisional absorption of XUV radiation in warm dense aluminium.

暖致密铝中 XUV 辐射碰撞吸收的实验测量。

• DOI: 10.1103/physreve.94.023203
• 发表时间: 2016
• 期刊: Physical review. E
• 作者: Kettle B

Warm Dense Matter: Laboratory generation and diagnosis

温暖的致密物质：实验室生成和诊断

• 发表时间: 2021
• 作者: Riley

K-Edge Structure in Shock-Compressed Chlorinated Parylene

冲击压缩氯化聚对二甲苯中的 K 边缘结构

• DOI: 10.3390/atoms11100135
• 发表时间: 2023
• 期刊: Atoms
• 影响因子: 1.8
• 作者: Bailie D

Using a commercial mini-X-ray source for calibrating Bragg crystals

使用商用微型 X 射线源校准布拉格晶体

• DOI: 10.1088/1748-0221/13/12/p12004
• 发表时间: 2018
• 期刊: Journal of Instrumentation
• 影响因子: 1.3
• 作者: Brozas F

Time-dependent effects in melting and phase change for laser-shocked iron

激光冲击铁的熔化和相变随时间变化的影响

• DOI: 10.1103/physrevresearch.2.033366
• 发表时间: 2020
• 期刊: Physical Review Research
• 影响因子: 4.2
• 作者: White S