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Measurements of optical properties of solid plasma and development of detail physical modeling

固体等离子体光学特性的测量和详细物理模型的开发

基本信息

批准号：
16204048
负责人：
YONEDA Hitoki
金额：
$ 18.22万
依托单位：
University of Electro-Communications
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16204048/
关键词：
ultra-short-pulse laser warm dense matter conductivity equation of states adiabatic expansion two fluid region electron localization metal-nonmetal transition equation of state droplet lens photonic crystal fiber

项目摘要

In this research, we investigate warm dense mater (WDM) physics which is located at the middle parameter range between condensed matter and plasmas. In this matter, atoms in high density matter is electronically excited and/or ionized. That means internal pressure in this matter is beyond Mbar and that number is the similar to the interia pressure in the large planets. Physically, there are difficulties to create the details model because both extrapolation from the condensed mater and plasma physics is failed. In the case of condensed matter model, the material condition is considered as sum of the ideal, well ordered wave-functions of atoms, but in WDM, some atoms excited electronically, some atoms keep the electron more tightly with bounded orbit. In plasma physics, the electron would be free from the individual ions, but in WDM, electrons are strongly affected by the nearest atom potential. In addition, the reason why in this parameter region, there are not good physical models is … More the lack of the precised experimental data. This is mainly caused from the difficulties in measurements of such short-live extreme conditions.For overcome of these difficulties, we have developed ultra-short pulse white light probe and deep ultraviolet pump laser system to identify the optical properties of these transient condition. In this measurement, the WDM condition created with deep ultra-violet ultra-short pulse lasers is diagnosed with polarimater measurements of reflected light. To obtain full set of the Stokes parameters, the reflected light is divided into four different polarization component beams and observed with frequency resolved measurements system. The temporal structures are obtained with changing the delay of the arrival time of the probe beam. With this method, we identify when the transition occurs or how parameters are changed in time and space, and what is resonant frequency of this transient material.To compare these measured data, we also construct new equation state model for this WDM. According to the comparison with Mercury behaviors, the strong interaction between each atom should be involved in this model. For example, to achieve the enough accurate curve of two-fluid region, we should include the cluster like formation of Hg atoms up to several tens of atoms. In addition, during these studies, we have found even with s and p orbit of electrons, the potential energy curves are crossed each other and the energy of 6p conditions, in some parameters, is lower than that of 6s. Finally, we find that it is necessary to include all these detail into the equation-of-state model in WDM to achieve the realistic reasonable properties. Less

在这项研究中，我们研究了位于凝聚态和等离子体之间的中间参数范围的暖密物质（WDM）物理。在这种物质中，高密度物质中的原子被电子激发和/或电离。这意味着这种物质的内部压力超过了Mbar，这个数字与大型行星的内部压力相似。在物理上，由于从凝聚态物质和等离子体物理的外推都是失败的，因此建立细节模型是困难的。在凝聚态模型中，物质条件被认为是理想的、有序的原子波函数之和，而在WDM中，一些原子被电子激发，一些原子将电子更紧密地保持在有界轨道上。在等离子体物理学中，电子将不受单个离子的影响，但在WDM中，电子受到最近原子势的强烈影响。此外，在这个参数区域中，没有好的物理模型的原因是， ...更多信息缺乏精确的实验数据。这主要是由于这种短寿命的极端条件测量困难，为了克服这些困难，我们研制了超短脉冲白色光探针和深紫外泵浦激光系统，以识别这些瞬态条件的光学特性。在该测量中，利用反射光的偏振计测量来诊断用深紫外超短脉冲激光器创建的WDM条件。为了获得完整的斯托克斯参数，反射光被分成四个不同的偏振分量光束，并使用频率分辨测量系统进行观察。通过改变探测光束到达时间的延迟来获得时间结构。利用这种方法，我们确定了跃迁发生的时间、参数在时间和空间上是如何变化的，以及这种瞬态材料的共振频率是多少，为了比较这些测量数据，我们还为这种WDM构造了新的方程态模型。通过与汞原子的行为比较，认为该模型应考虑原子间的强相互作用。例如，为了获得足够精确的双流体区曲线，我们应该包括Hg原子的团簇形成，直到几十个原子。另外，在这些研究中，我们发现即使电子的轨道是s和p，势能曲线也是交叉的，并且在某些参数下，6p条件下的能量低于6s条件下的能量。最后，我们发现在WDM的状态方程模型中包含所有这些细节是必要的，以获得现实合理的性质。少

项目成果

期刊论文数量（16）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Warm dense matterの計測

热致密物质的测量

DOI：
发表时间：
2007
期刊：
プラズマ・核融合学会誌 Vol.83 No.8(印刷中)
影响因子：
0
作者：
M.;Kojima;Y.;Sunatsuki;S.;Iijima;N.;Matsumoto;F.;Dahan;J.P.;Tuchagues;松本尚英;H.Kitamura;米田仁紀
通讯作者：
米田仁紀

Cohesive properties of mercury clusters in the ground and excited states

基态和激发态汞簇的内聚特性