High-power lasers are at the forefront of science in many domains. While their fields are still far from reaching the Schwinger limit, they have been used in extreme regimes, to successfully accelerate particles at high energies, or to reproduce phenomena observed in astrophysical settings. However, our understanding of laser plasma interactions is limited by numerical simulations, which are very expensive to run as short temporal and spatial scales need to be resolved explicitly. Under such circumstances, a non-collisional approach to model laser-plasma interactions becomes numerically expensive. Even a collisional approach, modeling the electrons and ions as independent fluids, is slow in practice. In both cases, the limitation comes from a direct computation of electron motion. In this work, we show how the generalized Ohm's law captures collisional absorption phenomena through the macroscopic interactions of laser fields, electron flows, and ion dynamics. This approach replicates several features usually associated with explicit electron motion, such as cut-off density, reflection and absorption. As the electron dynamics is now solved implicitly, the spatial and temporal scales of this model fit well between multi-fluid and standard magnetohydrodynamics scales, allowing to study a new class of problems that would be too expensive to solve numerically with other methods.
Quantum statistical model of nonlinear inverse bremsstrahlung absorption in strongly coupled plasmas
本文提出了一种计算激光在稠密等离子体中碰撞逆韧致辐射吸收的新方法。所使用的量子统计形式主义允许避免在经典方法中必需的{ \em ad hoc}截止。因此，目前的方法仍然可靠的强电子-离子相互作用。此外，这两个动态的，依赖于场的响应和硬电子-离子碰撞，始终纳入。后者以平均的方式被视为阻止力，而阻止力又被转换为摩擦力的形式。在这里，第一次阻止功率和碰撞激光吸收的问题之间的联系。这使得理论开发的阻止功率计算，如量子T矩阵的方法，被应用到碰撞激光吸收的问题。新的方法适应的低频和高频的限制，在文中解释，是有效的任意激光场强度。与经典的MD模拟的比较表明，新方法的有效性在宽的参数范围内测试。
Damped dust-ion-acoustic solitons in collisional magnetized nonthermal plasmas
研究了一个多粒子磁化碰撞非热等离子体系统中的耗散尘埃-离子-声（DIA）孤子模\textbf{theoretically and parametrically}的特性。该系统中包含惯性离子、服从非热$κ-$分布的非惯性电子和不动尘埃粒子。静电孤波模与低频耗散尘埃离子声孤波（DIASW）有关。考虑了离子与中性粒子的碰撞效应，研究了离子与中性粒子碰撞效应对耗散型DIASW动力学的影响。空间和实验室中的等离子体介质大多远离热平衡，粒子分布更符合$κ-$非热分布，而非热麦克斯韦分布。采用约化摄动方法导出阻尼KdV（dKdV）方程，并利用切双曲方法导出dKdV方程的孤波解，分析其基本特征（振幅、宽度、速度、时间演化等）.分散的潜水员的传播性质，也耗散DIASW的基本特征被认为是影响显着由于等离子体配置参数的变化，也由于在所考虑的等离子体系统中的超热指数$κ$的变化。这项研究的结果的含义可能是有用的，更好地了解静电本地化的扰动，在离子长度和时间尺度，在空间和实验尘埃等离子体，其中存在的过量高能电子和离子中性碰撞阻尼是负责。
Design of experiments characterising heat conduction in magnetised, weakly collisional plasma
University of Oxford（牛津大学）；Rutherford Appleton Laboratory（卢瑟福阿普尔顿实验室）；AWE（英国原子能管理局）；University of Chicago（芝加哥大学）；Gettysburg College（盖提斯堡学院）；Queen’s University Belfast（贝尔法斯特女王大学）；University of California Berkeley（加州大学伯克利分校）；University of Rochester（罗切斯特大学）
X-Ray Spectroscopy for Characterizing Stimulated Raman Scattering in Inertial Confinement Fusion
Key Laboratory of Radiation Physics and Technology of Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University（四川大学核科学技术学院辐射物理与技术教育部重点实验室）；National Key Laboratory of Plasma Physics, Laser Fusion Research Center, China Academy of Engineering Physics（中国工程物理研究院激光聚变研究中心等离子体物理全国重点实验室）；College of Intelligent Manufacturing, Sichuan University of Arts and Science（四川文理学院智能制造学院）
Experimental observations of microturbulence-suppressed parallel heat conduction in a weakly collisional, high-\b{eta} plasma
University of Oxford（牛津大学）；Rutherford Appleton Laboratory（鲁瑟福阿普尔顿实验室）；AWE（英国原子武器研究局）；University of Chicago（芝加哥大学）；Gettysburg College（盖茨堡学院）；Queen’s University Belfast（贝尔法斯特女王大学）；University of Rochester（罗切斯特大学）；University of California Berkeley（加州大学伯克利分校）
Probing ultrafast heating and ionization dynamics in solid density plasmas with time-resolved resonant X-ray absorption and emission
Helmholtz-Zentrum Dresden-Rossendorf（德累斯顿罗森多夫亥姆霍兹中心）；European XFEL（欧洲X射线自由电子激光设施）；Technische Universität Bergakademie Freiberg（弗莱贝格矿业科技大学）；Technische Universität Dresden（德累斯顿工业大学）；Center for X-ray and Nano Science CXNS, Deutsches Elektronen-Synchrotron DESY（德国电子同步辐射中心X射线与纳米科学中心）；Universität Siegen（锡根大学）；The Extreme Light Infrastructure ERIC, ELI Beamlines Facility（极端光基础设施欧洲研究联盟，ELI光束线设施）；National Institute for Fusion Sciences（国立融合科学研究所）
Informing spectral models for dense plasmas with K-edge absorption measurements of warm dense copper
Lawrence Livermore National Laboratory（劳伦斯利弗莫尔国家实验室）；University of California San Diego（加州大学圣地亚哥分校）；Laboratory for Laser Energetics, University of Rochester（罗切斯特大学激光能量学实验室）；Sandia National Laboratories（桑迪亚国家实验室）；University of Oxford（牛津大学）
