One of the long-standing puzzles observed in many laser-plasma experiments is the gap in the Raman backscattering spectrum. This gap is characterized by the absence of backscattered light between some critical wavelength and twice the incident laser wavelength. The latter is associated with the absolute Raman instability from the quarter-critical density surface. Supported by particle-in-cell (PIC) simulations, it is suggested that the gap can result from the collisional damping of the backscattered light. A linear analysis of the competition between the Raman growth rate and the damping rate in a non-homogenous plasma predicts the gap's existence and width as a function of the system's parameters. The theory is compared with the PIC simulations and past experiments.
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。
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）
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）
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）
