北京大学应用物理与技术研究中心

高能量密度物理数值模拟教育部重点实验室

Dimitri Batani Visiting professor（University of Bordeaux）

时  间：2023年10月26日（周四）中午12:20

地  点：北京大学工学院1号楼210会议室

报告内容摘要：

The study of the physics of high energy density matter requires the development of adequate diagnostics to probe matter state and its hydrodynamics. Time resolved X-ray radiography is often used to retrieve information on phenomena like shock wave propagation, implosion dynamics, etc. This normally used a laser-produced plasma as a powerful source of X-rays which are used to “backlight” the sample to be probed. X-ray radiography is based on the difference in the absorption of X-rays by matter with different characteristics. In the introduction, I will give a few examples of application of resolved X-ray radiography. Despite being a powerful diagnostic, it fails when the difference in absorption becomes small because in this case there is not enough contrast in the formed images. One particular case when this happens is the propagation of a second shock in matter which has already been compressed and heated by a first shock (a problem clearly relevant for the “Shock Ignition” approach to Inertial Fusion). For this reason, we are trying to develop X-ray Phase contrast Imaging. Unlike X-ray radiography, XPCI is based on the difference in refraction index of matter which induces a phase shift in the probing X-ray radiation. In the talk, I will present the results of an experiment performed at GSI, Germany, using the laser Phelix, the approach developed to analyze XPCI images, and the perspectives of future use.

报告人简历：

Dimitri Batani，法国波尔多大学特级教授，欧洲科学院院士，欧洲物理学会会士。高能量密度物理专家。在激光产生等离子体、高能量密度物质状态、激光驱动的辐射和粒子源、等离子体诊断、惯性约束聚变物理等多个方向上做出了开拓性的贡献。发表SCI论文400余篇，H因子>40，引用7000余次。获意大利物理学会(SIF)和法国物理学会联合颁发的“2017年弗里德尔沃尔特拉奖”(Friedel Volterra Prize 2017)以及韩国原子能研究院奖(Award of Korea Atomic Energy Research Institute)。担任Applied Physics B 期刊编辑，Laser and Particle Beams 期刊编委会委员和High Power Laser Science and Engineering 期刊编委会委员。Matter and Radiation at Extremes 特邀专刊编辑。 

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